3243 строки
87 KiB
C
3243 строки
87 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Digital Audio (PCM) abstract layer / OSS compatible
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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*/
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#if 0
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#define PLUGIN_DEBUG
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#endif
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#if 0
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#define OSS_DEBUG
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#endif
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/sched/signal.h>
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#include <linux/time.h>
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#include <linux/vmalloc.h>
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#include <linux/module.h>
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#include <linux/math64.h>
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#include <linux/string.h>
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#include <linux/compat.h>
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#include <sound/core.h>
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#include <sound/minors.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include "pcm_plugin.h"
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#include <sound/info.h>
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#include <linux/soundcard.h>
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#include <sound/initval.h>
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#include <sound/mixer_oss.h>
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#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
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static int dsp_map[SNDRV_CARDS];
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static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
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static bool nonblock_open = 1;
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MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
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MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
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MODULE_LICENSE("GPL");
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module_param_array(dsp_map, int, NULL, 0444);
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MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
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module_param_array(adsp_map, int, NULL, 0444);
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MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
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module_param(nonblock_open, bool, 0644);
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MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
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MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
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MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
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static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
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static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
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static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
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/*
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* helper functions to process hw_params
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*/
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static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
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{
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int changed = 0;
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if (i->min < min) {
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i->min = min;
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i->openmin = openmin;
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changed = 1;
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} else if (i->min == min && !i->openmin && openmin) {
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i->openmin = 1;
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changed = 1;
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}
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if (i->integer) {
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if (i->openmin) {
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i->min++;
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i->openmin = 0;
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}
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}
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if (snd_interval_checkempty(i)) {
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snd_interval_none(i);
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return -EINVAL;
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}
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return changed;
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}
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static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
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{
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int changed = 0;
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if (i->max > max) {
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i->max = max;
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i->openmax = openmax;
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changed = 1;
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} else if (i->max == max && !i->openmax && openmax) {
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i->openmax = 1;
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changed = 1;
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}
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if (i->integer) {
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if (i->openmax) {
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i->max--;
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i->openmax = 0;
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}
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}
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if (snd_interval_checkempty(i)) {
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snd_interval_none(i);
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return -EINVAL;
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}
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return changed;
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}
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static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
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{
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struct snd_interval t;
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t.empty = 0;
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t.min = t.max = val;
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t.openmin = t.openmax = 0;
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t.integer = 1;
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return snd_interval_refine(i, &t);
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}
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/**
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* snd_pcm_hw_param_value_min
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* @params: the hw_params instance
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* @var: parameter to retrieve
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* @dir: pointer to the direction (-1,0,1) or NULL
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*
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* Return the minimum value for field PAR.
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*/
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static unsigned int
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snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
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snd_pcm_hw_param_t var, int *dir)
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{
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if (hw_is_mask(var)) {
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if (dir)
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*dir = 0;
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return snd_mask_min(hw_param_mask_c(params, var));
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}
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if (hw_is_interval(var)) {
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const struct snd_interval *i = hw_param_interval_c(params, var);
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if (dir)
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*dir = i->openmin;
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return snd_interval_min(i);
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}
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return -EINVAL;
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}
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/**
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* snd_pcm_hw_param_value_max
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* @params: the hw_params instance
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* @var: parameter to retrieve
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* @dir: pointer to the direction (-1,0,1) or NULL
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*
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* Return the maximum value for field PAR.
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*/
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static int
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snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
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snd_pcm_hw_param_t var, int *dir)
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{
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if (hw_is_mask(var)) {
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if (dir)
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*dir = 0;
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return snd_mask_max(hw_param_mask_c(params, var));
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}
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if (hw_is_interval(var)) {
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const struct snd_interval *i = hw_param_interval_c(params, var);
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if (dir)
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*dir = - (int) i->openmax;
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return snd_interval_max(i);
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}
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return -EINVAL;
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}
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static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
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snd_pcm_hw_param_t var,
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const struct snd_mask *val)
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{
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int changed;
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changed = snd_mask_refine(hw_param_mask(params, var), val);
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if (changed > 0) {
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params->cmask |= 1 << var;
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params->rmask |= 1 << var;
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}
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return changed;
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}
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static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
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struct snd_pcm_hw_params *params,
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snd_pcm_hw_param_t var,
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const struct snd_mask *val)
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{
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int changed = _snd_pcm_hw_param_mask(params, var, val);
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if (changed < 0)
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return changed;
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if (params->rmask) {
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int err = snd_pcm_hw_refine(pcm, params);
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if (err < 0)
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return err;
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}
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return 0;
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}
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static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
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snd_pcm_hw_param_t var, unsigned int val,
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int dir)
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{
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int changed;
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int open = 0;
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if (dir) {
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if (dir > 0) {
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open = 1;
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} else if (dir < 0) {
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if (val > 0) {
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open = 1;
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val--;
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}
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}
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}
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if (hw_is_mask(var))
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changed = snd_mask_refine_min(hw_param_mask(params, var),
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val + !!open);
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else if (hw_is_interval(var))
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changed = snd_interval_refine_min(hw_param_interval(params, var),
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val, open);
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else
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return -EINVAL;
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if (changed > 0) {
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params->cmask |= 1 << var;
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params->rmask |= 1 << var;
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}
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return changed;
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}
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/**
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* snd_pcm_hw_param_min
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* @pcm: PCM instance
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* @params: the hw_params instance
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* @var: parameter to retrieve
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* @val: minimal value
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* @dir: pointer to the direction (-1,0,1) or NULL
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*
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* Inside configuration space defined by PARAMS remove from PAR all
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* values < VAL. Reduce configuration space accordingly.
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* Return new minimum or -EINVAL if the configuration space is empty
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*/
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static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
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struct snd_pcm_hw_params *params,
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snd_pcm_hw_param_t var, unsigned int val,
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int *dir)
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{
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int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
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if (changed < 0)
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return changed;
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if (params->rmask) {
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int err = snd_pcm_hw_refine(pcm, params);
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if (err < 0)
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return err;
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}
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return snd_pcm_hw_param_value_min(params, var, dir);
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}
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static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
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snd_pcm_hw_param_t var, unsigned int val,
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int dir)
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{
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int changed;
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int open = 0;
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if (dir) {
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if (dir < 0) {
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open = 1;
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} else if (dir > 0) {
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open = 1;
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val++;
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}
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}
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if (hw_is_mask(var)) {
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if (val == 0 && open) {
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snd_mask_none(hw_param_mask(params, var));
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changed = -EINVAL;
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} else
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changed = snd_mask_refine_max(hw_param_mask(params, var),
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val - !!open);
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} else if (hw_is_interval(var))
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changed = snd_interval_refine_max(hw_param_interval(params, var),
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val, open);
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else
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return -EINVAL;
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if (changed > 0) {
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params->cmask |= 1 << var;
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params->rmask |= 1 << var;
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}
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return changed;
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}
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/**
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* snd_pcm_hw_param_max
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* @pcm: PCM instance
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* @params: the hw_params instance
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* @var: parameter to retrieve
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* @val: maximal value
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* @dir: pointer to the direction (-1,0,1) or NULL
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*
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* Inside configuration space defined by PARAMS remove from PAR all
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* values >= VAL + 1. Reduce configuration space accordingly.
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* Return new maximum or -EINVAL if the configuration space is empty
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*/
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static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
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struct snd_pcm_hw_params *params,
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snd_pcm_hw_param_t var, unsigned int val,
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int *dir)
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{
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int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
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if (changed < 0)
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return changed;
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if (params->rmask) {
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int err = snd_pcm_hw_refine(pcm, params);
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if (err < 0)
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return err;
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}
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return snd_pcm_hw_param_value_max(params, var, dir);
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}
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static int boundary_sub(int a, int adir,
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int b, int bdir,
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int *c, int *cdir)
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{
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adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
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bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
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*c = a - b;
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*cdir = adir - bdir;
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if (*cdir == -2) {
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(*c)--;
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} else if (*cdir == 2) {
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(*c)++;
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}
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return 0;
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}
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static int boundary_lt(unsigned int a, int adir,
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unsigned int b, int bdir)
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{
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if (adir < 0) {
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a--;
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adir = 1;
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} else if (adir > 0)
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adir = 1;
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if (bdir < 0) {
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b--;
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bdir = 1;
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} else if (bdir > 0)
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bdir = 1;
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return a < b || (a == b && adir < bdir);
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}
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/* Return 1 if min is nearer to best than max */
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static int boundary_nearer(int min, int mindir,
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int best, int bestdir,
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int max, int maxdir)
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{
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int dmin, dmindir;
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int dmax, dmaxdir;
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boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
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boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
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return boundary_lt(dmin, dmindir, dmax, dmaxdir);
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}
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/**
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* snd_pcm_hw_param_near
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* @pcm: PCM instance
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* @params: the hw_params instance
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* @var: parameter to retrieve
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* @best: value to set
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* @dir: pointer to the direction (-1,0,1) or NULL
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*
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* Inside configuration space defined by PARAMS set PAR to the available value
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* nearest to VAL. Reduce configuration space accordingly.
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* This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
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* SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
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* Return the value found.
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*/
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static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
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struct snd_pcm_hw_params *params,
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snd_pcm_hw_param_t var, unsigned int best,
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int *dir)
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{
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struct snd_pcm_hw_params *save = NULL;
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int v;
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unsigned int saved_min;
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int last = 0;
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int min, max;
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int mindir, maxdir;
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int valdir = dir ? *dir : 0;
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/* FIXME */
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if (best > INT_MAX)
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best = INT_MAX;
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min = max = best;
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mindir = maxdir = valdir;
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if (maxdir > 0)
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maxdir = 0;
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else if (maxdir == 0)
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maxdir = -1;
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else {
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maxdir = 1;
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max--;
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}
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save = kmalloc(sizeof(*save), GFP_KERNEL);
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if (save == NULL)
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return -ENOMEM;
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*save = *params;
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saved_min = min;
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min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
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if (min >= 0) {
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struct snd_pcm_hw_params *params1;
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if (max < 0)
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goto _end;
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if ((unsigned int)min == saved_min && mindir == valdir)
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goto _end;
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params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
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if (params1 == NULL) {
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kfree(save);
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return -ENOMEM;
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}
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*params1 = *save;
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max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
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if (max < 0) {
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kfree(params1);
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goto _end;
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}
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if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
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*params = *params1;
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last = 1;
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}
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kfree(params1);
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} else {
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*params = *save;
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max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
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if (max < 0) {
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kfree(save);
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return max;
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}
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last = 1;
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}
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_end:
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kfree(save);
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if (last)
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v = snd_pcm_hw_param_last(pcm, params, var, dir);
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else
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v = snd_pcm_hw_param_first(pcm, params, var, dir);
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return v;
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}
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static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
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snd_pcm_hw_param_t var, unsigned int val,
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int dir)
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{
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int changed;
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if (hw_is_mask(var)) {
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struct snd_mask *m = hw_param_mask(params, var);
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if (val == 0 && dir < 0) {
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changed = -EINVAL;
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snd_mask_none(m);
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} else {
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if (dir > 0)
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val++;
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else if (dir < 0)
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val--;
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changed = snd_mask_refine_set(hw_param_mask(params, var), val);
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}
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} else if (hw_is_interval(var)) {
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struct snd_interval *i = hw_param_interval(params, var);
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if (val == 0 && dir < 0) {
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changed = -EINVAL;
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snd_interval_none(i);
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} else if (dir == 0)
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changed = snd_interval_refine_set(i, val);
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else {
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struct snd_interval t;
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t.openmin = 1;
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t.openmax = 1;
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t.empty = 0;
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t.integer = 0;
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if (dir < 0) {
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t.min = val - 1;
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t.max = val;
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} else {
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t.min = val;
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t.max = val+1;
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}
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changed = snd_interval_refine(i, &t);
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}
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} else
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return -EINVAL;
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if (changed > 0) {
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params->cmask |= 1 << var;
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params->rmask |= 1 << var;
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}
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return changed;
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}
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/**
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* snd_pcm_hw_param_set
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* @pcm: PCM instance
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* @params: the hw_params instance
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* @var: parameter to retrieve
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* @val: value to set
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* @dir: pointer to the direction (-1,0,1) or NULL
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*
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* Inside configuration space defined by PARAMS remove from PAR all
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* values != VAL. Reduce configuration space accordingly.
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* Return VAL or -EINVAL if the configuration space is empty
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*/
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static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
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struct snd_pcm_hw_params *params,
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snd_pcm_hw_param_t var, unsigned int val,
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int dir)
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{
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int changed = _snd_pcm_hw_param_set(params, var, val, dir);
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if (changed < 0)
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return changed;
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if (params->rmask) {
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int err = snd_pcm_hw_refine(pcm, params);
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if (err < 0)
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|
return err;
|
|
}
|
|
return snd_pcm_hw_param_value(params, var, NULL);
|
|
}
|
|
|
|
static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
int changed;
|
|
changed = snd_interval_setinteger(hw_param_interval(params, var));
|
|
if (changed > 0) {
|
|
params->cmask |= 1 << var;
|
|
params->rmask |= 1 << var;
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
/*
|
|
* plugin
|
|
*/
|
|
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
|
|
static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct snd_pcm_plugin *plugin, *next;
|
|
|
|
plugin = runtime->oss.plugin_first;
|
|
while (plugin) {
|
|
next = plugin->next;
|
|
snd_pcm_plugin_free(plugin);
|
|
plugin = next;
|
|
}
|
|
runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
|
|
{
|
|
struct snd_pcm_runtime *runtime = plugin->plug->runtime;
|
|
plugin->next = runtime->oss.plugin_first;
|
|
plugin->prev = NULL;
|
|
if (runtime->oss.plugin_first) {
|
|
runtime->oss.plugin_first->prev = plugin;
|
|
runtime->oss.plugin_first = plugin;
|
|
} else {
|
|
runtime->oss.plugin_last =
|
|
runtime->oss.plugin_first = plugin;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
|
|
{
|
|
struct snd_pcm_runtime *runtime = plugin->plug->runtime;
|
|
plugin->next = NULL;
|
|
plugin->prev = runtime->oss.plugin_last;
|
|
if (runtime->oss.plugin_last) {
|
|
runtime->oss.plugin_last->next = plugin;
|
|
runtime->oss.plugin_last = plugin;
|
|
} else {
|
|
runtime->oss.plugin_last =
|
|
runtime->oss.plugin_first = plugin;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
|
|
|
|
static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
long buffer_size = snd_pcm_lib_buffer_bytes(substream);
|
|
long bytes = frames_to_bytes(runtime, frames);
|
|
if (buffer_size == runtime->oss.buffer_bytes)
|
|
return bytes;
|
|
#if BITS_PER_LONG >= 64
|
|
return runtime->oss.buffer_bytes * bytes / buffer_size;
|
|
#else
|
|
{
|
|
u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
|
|
return div_u64(bsize, buffer_size);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
long buffer_size = snd_pcm_lib_buffer_bytes(substream);
|
|
if (buffer_size == runtime->oss.buffer_bytes)
|
|
return bytes_to_frames(runtime, bytes);
|
|
return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
|
|
}
|
|
|
|
static inline
|
|
snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
|
|
{
|
|
return runtime->hw_ptr_interrupt;
|
|
}
|
|
|
|
/* define extended formats in the recent OSS versions (if any) */
|
|
/* linear formats */
|
|
#define AFMT_S32_LE 0x00001000
|
|
#define AFMT_S32_BE 0x00002000
|
|
#define AFMT_S24_LE 0x00008000
|
|
#define AFMT_S24_BE 0x00010000
|
|
#define AFMT_S24_PACKED 0x00040000
|
|
|
|
/* other supported formats */
|
|
#define AFMT_FLOAT 0x00004000
|
|
#define AFMT_SPDIF_RAW 0x00020000
|
|
|
|
/* unsupported formats */
|
|
#define AFMT_AC3 0x00000400
|
|
#define AFMT_VORBIS 0x00000800
|
|
|
|
static snd_pcm_format_t snd_pcm_oss_format_from(int format)
|
|
{
|
|
switch (format) {
|
|
case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
|
|
case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
|
|
case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
|
|
case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
|
|
case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
|
|
case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
|
|
case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
|
|
case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
|
|
case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
|
|
case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
|
|
case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
|
|
case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
|
|
case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
|
|
case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
|
|
case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
|
|
case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
|
|
case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
|
|
default: return SNDRV_PCM_FORMAT_U8;
|
|
}
|
|
}
|
|
|
|
static int snd_pcm_oss_format_to(snd_pcm_format_t format)
|
|
{
|
|
switch (format) {
|
|
case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
|
|
case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
|
|
case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
|
|
case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
|
|
case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
|
|
case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
|
|
case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
|
|
case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
|
|
case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
|
|
case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
|
|
case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
|
|
case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
|
|
case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
|
|
case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
|
|
case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
|
|
case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
|
|
case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
|
|
default: return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *oss_params,
|
|
struct snd_pcm_hw_params *slave_params)
|
|
{
|
|
ssize_t s;
|
|
ssize_t oss_buffer_size;
|
|
ssize_t oss_period_size, oss_periods;
|
|
ssize_t min_period_size, max_period_size;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
size_t oss_frame_size;
|
|
|
|
oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
|
|
params_channels(oss_params) / 8;
|
|
|
|
oss_buffer_size = snd_pcm_hw_param_value_max(slave_params,
|
|
SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
|
|
NULL);
|
|
if (oss_buffer_size <= 0)
|
|
return -EINVAL;
|
|
oss_buffer_size = snd_pcm_plug_client_size(substream,
|
|
oss_buffer_size * oss_frame_size);
|
|
if (oss_buffer_size <= 0)
|
|
return -EINVAL;
|
|
oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
|
|
if (atomic_read(&substream->mmap_count)) {
|
|
if (oss_buffer_size > runtime->oss.mmap_bytes)
|
|
oss_buffer_size = runtime->oss.mmap_bytes;
|
|
}
|
|
|
|
if (substream->oss.setup.period_size > 16)
|
|
oss_period_size = substream->oss.setup.period_size;
|
|
else if (runtime->oss.fragshift) {
|
|
oss_period_size = 1 << runtime->oss.fragshift;
|
|
if (oss_period_size > oss_buffer_size / 2)
|
|
oss_period_size = oss_buffer_size / 2;
|
|
} else {
|
|
int sd;
|
|
size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
|
|
|
|
oss_period_size = oss_buffer_size;
|
|
do {
|
|
oss_period_size /= 2;
|
|
} while (oss_period_size > bytes_per_sec);
|
|
if (runtime->oss.subdivision == 0) {
|
|
sd = 4;
|
|
if (oss_period_size / sd > 4096)
|
|
sd *= 2;
|
|
if (oss_period_size / sd < 4096)
|
|
sd = 1;
|
|
} else
|
|
sd = runtime->oss.subdivision;
|
|
oss_period_size /= sd;
|
|
if (oss_period_size < 16)
|
|
oss_period_size = 16;
|
|
}
|
|
|
|
min_period_size = snd_pcm_plug_client_size(substream,
|
|
snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
|
|
if (min_period_size > 0) {
|
|
min_period_size *= oss_frame_size;
|
|
min_period_size = roundup_pow_of_two(min_period_size);
|
|
if (oss_period_size < min_period_size)
|
|
oss_period_size = min_period_size;
|
|
}
|
|
|
|
max_period_size = snd_pcm_plug_client_size(substream,
|
|
snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
|
|
if (max_period_size > 0) {
|
|
max_period_size *= oss_frame_size;
|
|
max_period_size = rounddown_pow_of_two(max_period_size);
|
|
if (oss_period_size > max_period_size)
|
|
oss_period_size = max_period_size;
|
|
}
|
|
|
|
oss_periods = oss_buffer_size / oss_period_size;
|
|
|
|
if (substream->oss.setup.periods > 1)
|
|
oss_periods = substream->oss.setup.periods;
|
|
|
|
s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
|
|
if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags)
|
|
s = runtime->oss.maxfrags;
|
|
if (oss_periods > s)
|
|
oss_periods = s;
|
|
|
|
s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
|
|
if (s < 2)
|
|
s = 2;
|
|
if (oss_periods < s)
|
|
oss_periods = s;
|
|
|
|
while (oss_period_size * oss_periods > oss_buffer_size)
|
|
oss_period_size /= 2;
|
|
|
|
if (oss_period_size < 16)
|
|
return -EINVAL;
|
|
|
|
/* don't allocate too large period; 1MB period must be enough */
|
|
if (oss_period_size > 1024 * 1024)
|
|
return -ENOMEM;
|
|
|
|
runtime->oss.period_bytes = oss_period_size;
|
|
runtime->oss.period_frames = 1;
|
|
runtime->oss.periods = oss_periods;
|
|
return 0;
|
|
}
|
|
|
|
static int choose_rate(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params, unsigned int best_rate)
|
|
{
|
|
const struct snd_interval *it;
|
|
struct snd_pcm_hw_params *save;
|
|
unsigned int rate, prev;
|
|
|
|
save = kmalloc(sizeof(*save), GFP_KERNEL);
|
|
if (save == NULL)
|
|
return -ENOMEM;
|
|
*save = *params;
|
|
it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
|
|
|
|
/* try multiples of the best rate */
|
|
rate = best_rate;
|
|
for (;;) {
|
|
if (it->max < rate || (it->max == rate && it->openmax))
|
|
break;
|
|
if (it->min < rate || (it->min == rate && !it->openmin)) {
|
|
int ret;
|
|
ret = snd_pcm_hw_param_set(substream, params,
|
|
SNDRV_PCM_HW_PARAM_RATE,
|
|
rate, 0);
|
|
if (ret == (int)rate) {
|
|
kfree(save);
|
|
return rate;
|
|
}
|
|
*params = *save;
|
|
}
|
|
prev = rate;
|
|
rate += best_rate;
|
|
if (rate <= prev)
|
|
break;
|
|
}
|
|
|
|
/* not found, use the nearest rate */
|
|
kfree(save);
|
|
return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
|
|
}
|
|
|
|
/* parameter locking: returns immediately if tried during streaming */
|
|
static int lock_params(struct snd_pcm_runtime *runtime)
|
|
{
|
|
if (mutex_lock_interruptible(&runtime->oss.params_lock))
|
|
return -ERESTARTSYS;
|
|
if (atomic_read(&runtime->oss.rw_ref)) {
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
return -EBUSY;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void unlock_params(struct snd_pcm_runtime *runtime)
|
|
{
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
}
|
|
|
|
/* call with params_lock held */
|
|
static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct snd_pcm_hw_params *params, *sparams;
|
|
struct snd_pcm_sw_params *sw_params;
|
|
ssize_t oss_buffer_size, oss_period_size;
|
|
size_t oss_frame_size;
|
|
int err;
|
|
int direct;
|
|
snd_pcm_format_t format, sformat;
|
|
int n;
|
|
const struct snd_mask *sformat_mask;
|
|
struct snd_mask mask;
|
|
|
|
if (!runtime->oss.params)
|
|
return 0;
|
|
sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
|
|
params = kmalloc(sizeof(*params), GFP_KERNEL);
|
|
sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
|
|
if (!sw_params || !params || !sparams) {
|
|
err = -ENOMEM;
|
|
goto failure;
|
|
}
|
|
|
|
if (atomic_read(&substream->mmap_count))
|
|
direct = 1;
|
|
else
|
|
direct = substream->oss.setup.direct;
|
|
|
|
_snd_pcm_hw_params_any(sparams);
|
|
_snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
|
|
_snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
|
|
snd_mask_none(&mask);
|
|
if (atomic_read(&substream->mmap_count))
|
|
snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
|
|
else {
|
|
snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
|
|
if (!direct)
|
|
snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
|
|
}
|
|
err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
|
|
if (err < 0) {
|
|
pcm_dbg(substream->pcm, "No usable accesses\n");
|
|
err = -EINVAL;
|
|
goto failure;
|
|
}
|
|
|
|
err = choose_rate(substream, sparams, runtime->oss.rate);
|
|
if (err < 0)
|
|
goto failure;
|
|
err = snd_pcm_hw_param_near(substream, sparams,
|
|
SNDRV_PCM_HW_PARAM_CHANNELS,
|
|
runtime->oss.channels, NULL);
|
|
if (err < 0)
|
|
goto failure;
|
|
|
|
format = snd_pcm_oss_format_from(runtime->oss.format);
|
|
|
|
sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
|
|
if (direct)
|
|
sformat = format;
|
|
else
|
|
sformat = snd_pcm_plug_slave_format(format, sformat_mask);
|
|
|
|
if ((__force int)sformat < 0 ||
|
|
!snd_mask_test_format(sformat_mask, sformat)) {
|
|
pcm_for_each_format(sformat) {
|
|
if (snd_mask_test_format(sformat_mask, sformat) &&
|
|
snd_pcm_oss_format_to(sformat) >= 0)
|
|
goto format_found;
|
|
}
|
|
pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
|
|
err = -EINVAL;
|
|
goto failure;
|
|
}
|
|
format_found:
|
|
err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
|
|
if (err < 0)
|
|
goto failure;
|
|
|
|
if (direct) {
|
|
memcpy(params, sparams, sizeof(*params));
|
|
} else {
|
|
_snd_pcm_hw_params_any(params);
|
|
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
|
|
(__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
|
|
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
|
|
(__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
|
|
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
|
|
runtime->oss.channels, 0);
|
|
_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
|
|
runtime->oss.rate, 0);
|
|
pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
|
|
params_access(params), params_format(params),
|
|
params_channels(params), params_rate(params));
|
|
}
|
|
pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
|
|
params_access(sparams), params_format(sparams),
|
|
params_channels(sparams), params_rate(sparams));
|
|
|
|
oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
|
|
params_channels(params) / 8;
|
|
|
|
err = snd_pcm_oss_period_size(substream, params, sparams);
|
|
if (err < 0)
|
|
goto failure;
|
|
|
|
n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
|
|
err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
|
|
if (err < 0)
|
|
goto failure;
|
|
|
|
err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
|
|
runtime->oss.periods, NULL);
|
|
if (err < 0)
|
|
goto failure;
|
|
|
|
snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
|
|
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
|
|
if (err < 0) {
|
|
pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
|
|
goto failure;
|
|
}
|
|
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
|
|
snd_pcm_oss_plugin_clear(substream);
|
|
if (!direct) {
|
|
/* add necessary plugins */
|
|
snd_pcm_oss_plugin_clear(substream);
|
|
err = snd_pcm_plug_format_plugins(substream, params, sparams);
|
|
if (err < 0) {
|
|
pcm_dbg(substream->pcm,
|
|
"snd_pcm_plug_format_plugins failed: %i\n", err);
|
|
snd_pcm_oss_plugin_clear(substream);
|
|
goto failure;
|
|
}
|
|
if (runtime->oss.plugin_first) {
|
|
struct snd_pcm_plugin *plugin;
|
|
err = snd_pcm_plugin_build_io(substream, sparams, &plugin);
|
|
if (err < 0) {
|
|
pcm_dbg(substream->pcm,
|
|
"snd_pcm_plugin_build_io failed: %i\n", err);
|
|
snd_pcm_oss_plugin_clear(substream);
|
|
goto failure;
|
|
}
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
err = snd_pcm_plugin_append(plugin);
|
|
} else {
|
|
err = snd_pcm_plugin_insert(plugin);
|
|
}
|
|
if (err < 0) {
|
|
snd_pcm_oss_plugin_clear(substream);
|
|
goto failure;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (runtime->oss.trigger) {
|
|
sw_params->start_threshold = 1;
|
|
} else {
|
|
sw_params->start_threshold = runtime->boundary;
|
|
}
|
|
if (atomic_read(&substream->mmap_count) ||
|
|
substream->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
sw_params->stop_threshold = runtime->boundary;
|
|
else
|
|
sw_params->stop_threshold = runtime->buffer_size;
|
|
sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
|
|
sw_params->period_step = 1;
|
|
sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
|
|
1 : runtime->period_size;
|
|
if (atomic_read(&substream->mmap_count) ||
|
|
substream->oss.setup.nosilence) {
|
|
sw_params->silence_threshold = 0;
|
|
sw_params->silence_size = 0;
|
|
} else {
|
|
snd_pcm_uframes_t frames;
|
|
frames = runtime->period_size + 16;
|
|
if (frames > runtime->buffer_size)
|
|
frames = runtime->buffer_size;
|
|
sw_params->silence_threshold = frames;
|
|
sw_params->silence_size = frames;
|
|
}
|
|
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params);
|
|
if (err < 0) {
|
|
pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
|
|
goto failure;
|
|
}
|
|
|
|
runtime->oss.periods = params_periods(sparams);
|
|
oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
|
|
if (oss_period_size < 0) {
|
|
err = -EINVAL;
|
|
goto failure;
|
|
}
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
|
|
if (runtime->oss.plugin_first) {
|
|
err = snd_pcm_plug_alloc(substream, oss_period_size);
|
|
if (err < 0)
|
|
goto failure;
|
|
}
|
|
#endif
|
|
oss_period_size = array_size(oss_period_size, oss_frame_size);
|
|
oss_buffer_size = array_size(oss_period_size, runtime->oss.periods);
|
|
if (oss_buffer_size <= 0) {
|
|
err = -EINVAL;
|
|
goto failure;
|
|
}
|
|
|
|
runtime->oss.period_bytes = oss_period_size;
|
|
runtime->oss.buffer_bytes = oss_buffer_size;
|
|
|
|
pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
|
|
runtime->oss.period_bytes,
|
|
runtime->oss.buffer_bytes);
|
|
pdprintf("slave: period_size = %i, buffer_size = %i\n",
|
|
params_period_size(sparams),
|
|
params_buffer_size(sparams));
|
|
|
|
runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
|
|
runtime->oss.channels = params_channels(params);
|
|
runtime->oss.rate = params_rate(params);
|
|
|
|
kvfree(runtime->oss.buffer);
|
|
runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
|
|
if (!runtime->oss.buffer) {
|
|
err = -ENOMEM;
|
|
goto failure;
|
|
}
|
|
|
|
runtime->oss.params = 0;
|
|
runtime->oss.prepare = 1;
|
|
runtime->oss.buffer_used = 0;
|
|
if (runtime->dma_area)
|
|
snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
|
|
|
|
runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
|
|
|
|
err = 0;
|
|
failure:
|
|
kfree(sw_params);
|
|
kfree(params);
|
|
kfree(sparams);
|
|
return err;
|
|
}
|
|
|
|
/* this one takes the lock by itself */
|
|
static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
|
|
bool trylock)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
int err;
|
|
|
|
if (trylock) {
|
|
if (!(mutex_trylock(&runtime->oss.params_lock)))
|
|
return -EAGAIN;
|
|
} else if (mutex_lock_interruptible(&runtime->oss.params_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
err = snd_pcm_oss_change_params_locked(substream);
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
return err;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
|
|
{
|
|
int idx, err;
|
|
struct snd_pcm_substream *asubstream = NULL, *substream;
|
|
|
|
for (idx = 0; idx < 2; idx++) {
|
|
substream = pcm_oss_file->streams[idx];
|
|
if (substream == NULL)
|
|
continue;
|
|
if (asubstream == NULL)
|
|
asubstream = substream;
|
|
if (substream->runtime->oss.params) {
|
|
err = snd_pcm_oss_change_params(substream, false);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
if (!asubstream)
|
|
return -EIO;
|
|
if (r_substream)
|
|
*r_substream = asubstream;
|
|
return 0;
|
|
}
|
|
|
|
/* call with params_lock held */
|
|
/* NOTE: this always call PREPARE unconditionally no matter whether
|
|
* runtime->oss.prepare is set or not
|
|
*/
|
|
static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
|
|
{
|
|
int err;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
|
|
if (err < 0) {
|
|
pcm_dbg(substream->pcm,
|
|
"snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
|
|
return err;
|
|
}
|
|
runtime->oss.prepare = 0;
|
|
runtime->oss.prev_hw_ptr_period = 0;
|
|
runtime->oss.period_ptr = 0;
|
|
runtime->oss.buffer_used = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime;
|
|
int err;
|
|
|
|
runtime = substream->runtime;
|
|
if (runtime->oss.params) {
|
|
err = snd_pcm_oss_change_params(substream, false);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
if (runtime->oss.prepare) {
|
|
if (mutex_lock_interruptible(&runtime->oss.params_lock))
|
|
return -ERESTARTSYS;
|
|
err = snd_pcm_oss_prepare(substream);
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* call with params_lock held */
|
|
static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime;
|
|
int err;
|
|
|
|
runtime = substream->runtime;
|
|
if (runtime->oss.params) {
|
|
err = snd_pcm_oss_change_params_locked(substream);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
if (runtime->oss.prepare) {
|
|
err = snd_pcm_oss_prepare(substream);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
|
|
{
|
|
struct snd_pcm_runtime *runtime;
|
|
snd_pcm_uframes_t frames;
|
|
int err = 0;
|
|
|
|
while (1) {
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
|
|
if (err < 0)
|
|
break;
|
|
runtime = substream->runtime;
|
|
if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
|
|
break;
|
|
/* in case of overrun, skip whole periods like OSS/Linux driver does */
|
|
/* until avail(delay) <= buffer_size */
|
|
frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
|
|
frames /= runtime->period_size;
|
|
frames *= runtime->period_size;
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
|
|
if (err < 0)
|
|
break;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
int ret;
|
|
while (1) {
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
|
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
|
|
#ifdef OSS_DEBUG
|
|
pcm_dbg(substream->pcm,
|
|
"pcm_oss: write: recovering from %s\n",
|
|
runtime->status->state == SNDRV_PCM_STATE_XRUN ?
|
|
"XRUN" : "SUSPEND");
|
|
#endif
|
|
ret = snd_pcm_oss_prepare(substream);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
|
|
frames, in_kernel);
|
|
mutex_lock(&runtime->oss.params_lock);
|
|
if (ret != -EPIPE && ret != -ESTRPIPE)
|
|
break;
|
|
/* test, if we can't store new data, because the stream */
|
|
/* has not been started */
|
|
if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
|
|
return -EAGAIN;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
snd_pcm_sframes_t delay;
|
|
int ret;
|
|
while (1) {
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
|
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
|
|
#ifdef OSS_DEBUG
|
|
pcm_dbg(substream->pcm,
|
|
"pcm_oss: read: recovering from %s\n",
|
|
runtime->status->state == SNDRV_PCM_STATE_XRUN ?
|
|
"XRUN" : "SUSPEND");
|
|
#endif
|
|
ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
|
|
if (ret < 0)
|
|
break;
|
|
} else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
|
|
ret = snd_pcm_oss_prepare(substream);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
|
|
if (ret < 0)
|
|
break;
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
|
|
frames, in_kernel);
|
|
mutex_lock(&runtime->oss.params_lock);
|
|
if (ret == -EPIPE) {
|
|
if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
|
|
ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
if (ret != -ESTRPIPE)
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
|
|
snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
int ret;
|
|
while (1) {
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
|
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
|
|
#ifdef OSS_DEBUG
|
|
pcm_dbg(substream->pcm,
|
|
"pcm_oss: writev: recovering from %s\n",
|
|
runtime->status->state == SNDRV_PCM_STATE_XRUN ?
|
|
"XRUN" : "SUSPEND");
|
|
#endif
|
|
ret = snd_pcm_oss_prepare(substream);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
ret = snd_pcm_kernel_writev(substream, bufs, frames);
|
|
if (ret != -EPIPE && ret != -ESTRPIPE)
|
|
break;
|
|
|
|
/* test, if we can't store new data, because the stream */
|
|
/* has not been started */
|
|
if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
|
|
return -EAGAIN;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
int ret;
|
|
while (1) {
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
|
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
|
|
#ifdef OSS_DEBUG
|
|
pcm_dbg(substream->pcm,
|
|
"pcm_oss: readv: recovering from %s\n",
|
|
runtime->status->state == SNDRV_PCM_STATE_XRUN ?
|
|
"XRUN" : "SUSPEND");
|
|
#endif
|
|
ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
|
|
if (ret < 0)
|
|
break;
|
|
} else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
|
|
ret = snd_pcm_oss_prepare(substream);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
ret = snd_pcm_kernel_readv(substream, bufs, frames);
|
|
if (ret != -EPIPE && ret != -ESTRPIPE)
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
|
|
|
|
static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
snd_pcm_sframes_t frames, frames1;
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
|
|
if (runtime->oss.plugin_first) {
|
|
struct snd_pcm_plugin_channel *channels;
|
|
size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
|
|
if (!in_kernel) {
|
|
if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
|
|
return -EFAULT;
|
|
buf = runtime->oss.buffer;
|
|
}
|
|
frames = bytes / oss_frame_bytes;
|
|
frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
|
|
if (frames1 < 0)
|
|
return frames1;
|
|
frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
|
|
if (frames1 <= 0)
|
|
return frames1;
|
|
bytes = frames1 * oss_frame_bytes;
|
|
} else
|
|
#endif
|
|
{
|
|
frames = bytes_to_frames(runtime, bytes);
|
|
frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
|
|
if (frames1 <= 0)
|
|
return frames1;
|
|
bytes = frames_to_bytes(runtime, frames1);
|
|
}
|
|
return bytes;
|
|
}
|
|
|
|
static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
|
|
{
|
|
size_t xfer = 0;
|
|
ssize_t tmp = 0;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
|
|
if (atomic_read(&substream->mmap_count))
|
|
return -ENXIO;
|
|
|
|
atomic_inc(&runtime->oss.rw_ref);
|
|
while (bytes > 0) {
|
|
if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
|
|
tmp = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
tmp = snd_pcm_oss_make_ready_locked(substream);
|
|
if (tmp < 0)
|
|
goto err;
|
|
if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
|
|
tmp = bytes;
|
|
if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
|
|
tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
|
|
if (tmp > 0) {
|
|
if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
|
|
tmp = -EFAULT;
|
|
goto err;
|
|
}
|
|
}
|
|
runtime->oss.buffer_used += tmp;
|
|
buf += tmp;
|
|
bytes -= tmp;
|
|
xfer += tmp;
|
|
if (substream->oss.setup.partialfrag ||
|
|
runtime->oss.buffer_used == runtime->oss.period_bytes) {
|
|
tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
|
|
runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
|
|
if (tmp <= 0)
|
|
goto err;
|
|
runtime->oss.bytes += tmp;
|
|
runtime->oss.period_ptr += tmp;
|
|
runtime->oss.period_ptr %= runtime->oss.period_bytes;
|
|
if (runtime->oss.period_ptr == 0 ||
|
|
runtime->oss.period_ptr == runtime->oss.buffer_used)
|
|
runtime->oss.buffer_used = 0;
|
|
else if ((substream->f_flags & O_NONBLOCK) != 0) {
|
|
tmp = -EAGAIN;
|
|
goto err;
|
|
}
|
|
}
|
|
} else {
|
|
tmp = snd_pcm_oss_write2(substream,
|
|
(const char __force *)buf,
|
|
runtime->oss.period_bytes, 0);
|
|
if (tmp <= 0)
|
|
goto err;
|
|
runtime->oss.bytes += tmp;
|
|
buf += tmp;
|
|
bytes -= tmp;
|
|
xfer += tmp;
|
|
if ((substream->f_flags & O_NONBLOCK) != 0 &&
|
|
tmp != runtime->oss.period_bytes)
|
|
tmp = -EAGAIN;
|
|
}
|
|
err:
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
if (tmp < 0)
|
|
break;
|
|
if (signal_pending(current)) {
|
|
tmp = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
tmp = 0;
|
|
}
|
|
atomic_dec(&runtime->oss.rw_ref);
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
|
|
}
|
|
|
|
static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
snd_pcm_sframes_t frames, frames1;
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
|
|
char __user *final_dst = (char __force __user *)buf;
|
|
if (runtime->oss.plugin_first) {
|
|
struct snd_pcm_plugin_channel *channels;
|
|
size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
|
|
if (!in_kernel)
|
|
buf = runtime->oss.buffer;
|
|
frames = bytes / oss_frame_bytes;
|
|
frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
|
|
if (frames1 < 0)
|
|
return frames1;
|
|
frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
|
|
if (frames1 <= 0)
|
|
return frames1;
|
|
bytes = frames1 * oss_frame_bytes;
|
|
if (!in_kernel && copy_to_user(final_dst, buf, bytes))
|
|
return -EFAULT;
|
|
} else
|
|
#endif
|
|
{
|
|
frames = bytes_to_frames(runtime, bytes);
|
|
frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
|
|
if (frames1 <= 0)
|
|
return frames1;
|
|
bytes = frames_to_bytes(runtime, frames1);
|
|
}
|
|
return bytes;
|
|
}
|
|
|
|
static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
|
|
{
|
|
size_t xfer = 0;
|
|
ssize_t tmp = 0;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
|
|
if (atomic_read(&substream->mmap_count))
|
|
return -ENXIO;
|
|
|
|
atomic_inc(&runtime->oss.rw_ref);
|
|
while (bytes > 0) {
|
|
if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
|
|
tmp = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
tmp = snd_pcm_oss_make_ready_locked(substream);
|
|
if (tmp < 0)
|
|
goto err;
|
|
if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
|
|
if (runtime->oss.buffer_used == 0) {
|
|
tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
|
|
if (tmp <= 0)
|
|
goto err;
|
|
runtime->oss.bytes += tmp;
|
|
runtime->oss.period_ptr = tmp;
|
|
runtime->oss.buffer_used = tmp;
|
|
}
|
|
tmp = bytes;
|
|
if ((size_t) tmp > runtime->oss.buffer_used)
|
|
tmp = runtime->oss.buffer_used;
|
|
if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
|
|
tmp = -EFAULT;
|
|
goto err;
|
|
}
|
|
buf += tmp;
|
|
bytes -= tmp;
|
|
xfer += tmp;
|
|
runtime->oss.buffer_used -= tmp;
|
|
} else {
|
|
tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
|
|
runtime->oss.period_bytes, 0);
|
|
if (tmp <= 0)
|
|
goto err;
|
|
runtime->oss.bytes += tmp;
|
|
buf += tmp;
|
|
bytes -= tmp;
|
|
xfer += tmp;
|
|
}
|
|
err:
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
if (tmp < 0)
|
|
break;
|
|
if (signal_pending(current)) {
|
|
tmp = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
tmp = 0;
|
|
}
|
|
atomic_dec(&runtime->oss.rw_ref);
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
|
|
}
|
|
|
|
static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
struct snd_pcm_runtime *runtime;
|
|
int i;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
substream = pcm_oss_file->streams[i];
|
|
if (!substream)
|
|
continue;
|
|
runtime = substream->runtime;
|
|
snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
|
|
mutex_lock(&runtime->oss.params_lock);
|
|
runtime->oss.prepare = 1;
|
|
runtime->oss.buffer_used = 0;
|
|
runtime->oss.prev_hw_ptr_period = 0;
|
|
runtime->oss.period_ptr = 0;
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
int err;
|
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream != NULL) {
|
|
err = snd_pcm_oss_make_ready(substream);
|
|
if (err < 0)
|
|
return err;
|
|
snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
|
|
}
|
|
/* note: all errors from the start action are ignored */
|
|
/* OSS apps do not know, how to handle them */
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
|
|
{
|
|
struct snd_pcm_runtime *runtime;
|
|
ssize_t result = 0;
|
|
snd_pcm_state_t state;
|
|
long res;
|
|
wait_queue_entry_t wait;
|
|
|
|
runtime = substream->runtime;
|
|
init_waitqueue_entry(&wait, current);
|
|
add_wait_queue(&runtime->sleep, &wait);
|
|
#ifdef OSS_DEBUG
|
|
pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
|
|
#endif
|
|
while (1) {
|
|
result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
|
|
if (result > 0) {
|
|
runtime->oss.buffer_used = 0;
|
|
result = 0;
|
|
break;
|
|
}
|
|
if (result != 0 && result != -EAGAIN)
|
|
break;
|
|
result = 0;
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
snd_pcm_stream_lock_irq(substream);
|
|
state = runtime->status->state;
|
|
snd_pcm_stream_unlock_irq(substream);
|
|
if (state != SNDRV_PCM_STATE_RUNNING) {
|
|
set_current_state(TASK_RUNNING);
|
|
break;
|
|
}
|
|
res = schedule_timeout(10 * HZ);
|
|
if (signal_pending(current)) {
|
|
result = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
if (res == 0) {
|
|
pcm_err(substream->pcm,
|
|
"OSS sync error - DMA timeout\n");
|
|
result = -EIO;
|
|
break;
|
|
}
|
|
}
|
|
remove_wait_queue(&runtime->sleep, &wait);
|
|
return result;
|
|
}
|
|
|
|
static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
int err = 0;
|
|
unsigned int saved_f_flags;
|
|
struct snd_pcm_substream *substream;
|
|
struct snd_pcm_runtime *runtime;
|
|
snd_pcm_format_t format;
|
|
unsigned long width;
|
|
size_t size;
|
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream != NULL) {
|
|
runtime = substream->runtime;
|
|
if (atomic_read(&substream->mmap_count))
|
|
goto __direct;
|
|
atomic_inc(&runtime->oss.rw_ref);
|
|
if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
|
|
atomic_dec(&runtime->oss.rw_ref);
|
|
return -ERESTARTSYS;
|
|
}
|
|
err = snd_pcm_oss_make_ready_locked(substream);
|
|
if (err < 0)
|
|
goto unlock;
|
|
format = snd_pcm_oss_format_from(runtime->oss.format);
|
|
width = snd_pcm_format_physical_width(format);
|
|
if (runtime->oss.buffer_used > 0) {
|
|
#ifdef OSS_DEBUG
|
|
pcm_dbg(substream->pcm, "sync: buffer_used\n");
|
|
#endif
|
|
size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
|
|
snd_pcm_format_set_silence(format,
|
|
runtime->oss.buffer + runtime->oss.buffer_used,
|
|
size);
|
|
err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
|
|
if (err < 0)
|
|
goto unlock;
|
|
} else if (runtime->oss.period_ptr > 0) {
|
|
#ifdef OSS_DEBUG
|
|
pcm_dbg(substream->pcm, "sync: period_ptr\n");
|
|
#endif
|
|
size = runtime->oss.period_bytes - runtime->oss.period_ptr;
|
|
snd_pcm_format_set_silence(format,
|
|
runtime->oss.buffer,
|
|
size * 8 / width);
|
|
err = snd_pcm_oss_sync1(substream, size);
|
|
if (err < 0)
|
|
goto unlock;
|
|
}
|
|
/*
|
|
* The ALSA's period might be a bit large than OSS one.
|
|
* Fill the remain portion of ALSA period with zeros.
|
|
*/
|
|
size = runtime->control->appl_ptr % runtime->period_size;
|
|
if (size > 0) {
|
|
size = runtime->period_size - size;
|
|
if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
|
|
snd_pcm_lib_write(substream, NULL, size);
|
|
else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
|
|
snd_pcm_lib_writev(substream, NULL, size);
|
|
}
|
|
unlock:
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
atomic_dec(&runtime->oss.rw_ref);
|
|
if (err < 0)
|
|
return err;
|
|
/*
|
|
* finish sync: drain the buffer
|
|
*/
|
|
__direct:
|
|
saved_f_flags = substream->f_flags;
|
|
substream->f_flags &= ~O_NONBLOCK;
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
|
|
substream->f_flags = saved_f_flags;
|
|
if (err < 0)
|
|
return err;
|
|
mutex_lock(&runtime->oss.params_lock);
|
|
runtime->oss.prepare = 1;
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
}
|
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
if (substream != NULL) {
|
|
err = snd_pcm_oss_make_ready(substream);
|
|
if (err < 0)
|
|
return err;
|
|
runtime = substream->runtime;
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
mutex_lock(&runtime->oss.params_lock);
|
|
runtime->oss.buffer_used = 0;
|
|
runtime->oss.prepare = 1;
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
|
|
{
|
|
int idx;
|
|
|
|
for (idx = 1; idx >= 0; --idx) {
|
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
|
|
struct snd_pcm_runtime *runtime;
|
|
int err;
|
|
|
|
if (substream == NULL)
|
|
continue;
|
|
runtime = substream->runtime;
|
|
if (rate < 1000)
|
|
rate = 1000;
|
|
else if (rate > 192000)
|
|
rate = 192000;
|
|
err = lock_params(runtime);
|
|
if (err < 0)
|
|
return err;
|
|
if (runtime->oss.rate != rate) {
|
|
runtime->oss.params = 1;
|
|
runtime->oss.rate = rate;
|
|
}
|
|
unlock_params(runtime);
|
|
}
|
|
return snd_pcm_oss_get_rate(pcm_oss_file);
|
|
}
|
|
|
|
static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
int err;
|
|
|
|
err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
|
|
if (err < 0)
|
|
return err;
|
|
return substream->runtime->oss.rate;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
|
|
{
|
|
int idx;
|
|
if (channels < 1)
|
|
channels = 1;
|
|
if (channels > 128)
|
|
return -EINVAL;
|
|
for (idx = 1; idx >= 0; --idx) {
|
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
|
|
struct snd_pcm_runtime *runtime;
|
|
int err;
|
|
|
|
if (substream == NULL)
|
|
continue;
|
|
runtime = substream->runtime;
|
|
err = lock_params(runtime);
|
|
if (err < 0)
|
|
return err;
|
|
if (runtime->oss.channels != channels) {
|
|
runtime->oss.params = 1;
|
|
runtime->oss.channels = channels;
|
|
}
|
|
unlock_params(runtime);
|
|
}
|
|
return snd_pcm_oss_get_channels(pcm_oss_file);
|
|
}
|
|
|
|
static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
int err;
|
|
|
|
err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
|
|
if (err < 0)
|
|
return err;
|
|
return substream->runtime->oss.channels;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
int err;
|
|
|
|
err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
|
|
if (err < 0)
|
|
return err;
|
|
return substream->runtime->oss.period_bytes;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
int err;
|
|
int direct;
|
|
struct snd_pcm_hw_params *params;
|
|
unsigned int formats = 0;
|
|
const struct snd_mask *format_mask;
|
|
int fmt;
|
|
|
|
err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
|
|
if (err < 0)
|
|
return err;
|
|
if (atomic_read(&substream->mmap_count))
|
|
direct = 1;
|
|
else
|
|
direct = substream->oss.setup.direct;
|
|
if (!direct)
|
|
return AFMT_MU_LAW | AFMT_U8 |
|
|
AFMT_S16_LE | AFMT_S16_BE |
|
|
AFMT_S8 | AFMT_U16_LE |
|
|
AFMT_U16_BE |
|
|
AFMT_S32_LE | AFMT_S32_BE |
|
|
AFMT_S24_LE | AFMT_S24_BE |
|
|
AFMT_S24_PACKED;
|
|
params = kmalloc(sizeof(*params), GFP_KERNEL);
|
|
if (!params)
|
|
return -ENOMEM;
|
|
_snd_pcm_hw_params_any(params);
|
|
err = snd_pcm_hw_refine(substream, params);
|
|
if (err < 0)
|
|
goto error;
|
|
format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
|
|
for (fmt = 0; fmt < 32; ++fmt) {
|
|
if (snd_mask_test(format_mask, fmt)) {
|
|
int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
|
|
if (f >= 0)
|
|
formats |= f;
|
|
}
|
|
}
|
|
|
|
error:
|
|
kfree(params);
|
|
return err < 0 ? err : formats;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
|
|
{
|
|
int formats, idx;
|
|
int err;
|
|
|
|
if (format != AFMT_QUERY) {
|
|
formats = snd_pcm_oss_get_formats(pcm_oss_file);
|
|
if (formats < 0)
|
|
return formats;
|
|
if (!(formats & format))
|
|
format = AFMT_U8;
|
|
for (idx = 1; idx >= 0; --idx) {
|
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
|
|
struct snd_pcm_runtime *runtime;
|
|
if (substream == NULL)
|
|
continue;
|
|
runtime = substream->runtime;
|
|
err = lock_params(runtime);
|
|
if (err < 0)
|
|
return err;
|
|
if (runtime->oss.format != format) {
|
|
runtime->oss.params = 1;
|
|
runtime->oss.format = format;
|
|
}
|
|
unlock_params(runtime);
|
|
}
|
|
}
|
|
return snd_pcm_oss_get_format(pcm_oss_file);
|
|
}
|
|
|
|
static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
int err;
|
|
|
|
err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
|
|
if (err < 0)
|
|
return err;
|
|
return substream->runtime->oss.format;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
|
|
{
|
|
struct snd_pcm_runtime *runtime;
|
|
|
|
runtime = substream->runtime;
|
|
if (subdivide == 0) {
|
|
subdivide = runtime->oss.subdivision;
|
|
if (subdivide == 0)
|
|
subdivide = 1;
|
|
return subdivide;
|
|
}
|
|
if (runtime->oss.subdivision || runtime->oss.fragshift)
|
|
return -EINVAL;
|
|
if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
|
|
subdivide != 8 && subdivide != 16)
|
|
return -EINVAL;
|
|
runtime->oss.subdivision = subdivide;
|
|
runtime->oss.params = 1;
|
|
return subdivide;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
|
|
{
|
|
int err = -EINVAL, idx;
|
|
|
|
for (idx = 1; idx >= 0; --idx) {
|
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
|
|
struct snd_pcm_runtime *runtime;
|
|
|
|
if (substream == NULL)
|
|
continue;
|
|
runtime = substream->runtime;
|
|
err = lock_params(runtime);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_pcm_oss_set_subdivide1(substream, subdivide);
|
|
unlock_params(runtime);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
|
|
{
|
|
struct snd_pcm_runtime *runtime;
|
|
int fragshift;
|
|
|
|
runtime = substream->runtime;
|
|
if (runtime->oss.subdivision || runtime->oss.fragshift)
|
|
return -EINVAL;
|
|
fragshift = val & 0xffff;
|
|
if (fragshift >= 25) /* should be large enough */
|
|
return -EINVAL;
|
|
runtime->oss.fragshift = fragshift;
|
|
runtime->oss.maxfrags = (val >> 16) & 0xffff;
|
|
if (runtime->oss.fragshift < 4) /* < 16 */
|
|
runtime->oss.fragshift = 4;
|
|
if (runtime->oss.maxfrags < 2)
|
|
runtime->oss.maxfrags = 2;
|
|
runtime->oss.params = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
|
|
{
|
|
int err = -EINVAL, idx;
|
|
|
|
for (idx = 1; idx >= 0; --idx) {
|
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
|
|
struct snd_pcm_runtime *runtime;
|
|
|
|
if (substream == NULL)
|
|
continue;
|
|
runtime = substream->runtime;
|
|
err = lock_params(runtime);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_pcm_oss_set_fragment1(substream, val);
|
|
unlock_params(runtime);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int snd_pcm_oss_nonblock(struct file * file)
|
|
{
|
|
spin_lock(&file->f_lock);
|
|
file->f_flags |= O_NONBLOCK;
|
|
spin_unlock(&file->f_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
|
|
{
|
|
|
|
if (substream == NULL) {
|
|
res &= ~DSP_CAP_DUPLEX;
|
|
return res;
|
|
}
|
|
#ifdef DSP_CAP_MULTI
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
if (substream->pstr->substream_count > 1)
|
|
res |= DSP_CAP_MULTI;
|
|
#endif
|
|
/* DSP_CAP_REALTIME is set all times: */
|
|
/* all ALSA drivers can return actual pointer in ring buffer */
|
|
#if defined(DSP_CAP_REALTIME) && 0
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
|
|
res &= ~DSP_CAP_REALTIME;
|
|
}
|
|
#endif
|
|
return res;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
int result, idx;
|
|
|
|
result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
|
|
for (idx = 0; idx < 2; idx++) {
|
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
|
|
result = snd_pcm_oss_get_caps1(substream, result);
|
|
}
|
|
result |= 0x0001; /* revision - same as SB AWE 64 */
|
|
return result;
|
|
}
|
|
|
|
static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
|
|
snd_pcm_uframes_t hw_ptr)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
snd_pcm_uframes_t appl_ptr;
|
|
appl_ptr = hw_ptr + runtime->buffer_size;
|
|
appl_ptr %= runtime->boundary;
|
|
runtime->control->appl_ptr = appl_ptr;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
|
|
{
|
|
struct snd_pcm_runtime *runtime;
|
|
struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
|
|
int err, cmd;
|
|
|
|
#ifdef OSS_DEBUG
|
|
pr_debug("pcm_oss: trigger = 0x%x\n", trigger);
|
|
#endif
|
|
|
|
psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
|
|
if (psubstream) {
|
|
err = snd_pcm_oss_make_ready(psubstream);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
if (csubstream) {
|
|
err = snd_pcm_oss_make_ready(csubstream);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
if (psubstream) {
|
|
runtime = psubstream->runtime;
|
|
cmd = 0;
|
|
if (mutex_lock_interruptible(&runtime->oss.params_lock))
|
|
return -ERESTARTSYS;
|
|
if (trigger & PCM_ENABLE_OUTPUT) {
|
|
if (runtime->oss.trigger)
|
|
goto _skip1;
|
|
if (atomic_read(&psubstream->mmap_count))
|
|
snd_pcm_oss_simulate_fill(psubstream,
|
|
get_hw_ptr_period(runtime));
|
|
runtime->oss.trigger = 1;
|
|
runtime->start_threshold = 1;
|
|
cmd = SNDRV_PCM_IOCTL_START;
|
|
} else {
|
|
if (!runtime->oss.trigger)
|
|
goto _skip1;
|
|
runtime->oss.trigger = 0;
|
|
runtime->start_threshold = runtime->boundary;
|
|
cmd = SNDRV_PCM_IOCTL_DROP;
|
|
runtime->oss.prepare = 1;
|
|
}
|
|
_skip1:
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
if (cmd) {
|
|
err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
if (csubstream) {
|
|
runtime = csubstream->runtime;
|
|
cmd = 0;
|
|
if (mutex_lock_interruptible(&runtime->oss.params_lock))
|
|
return -ERESTARTSYS;
|
|
if (trigger & PCM_ENABLE_INPUT) {
|
|
if (runtime->oss.trigger)
|
|
goto _skip2;
|
|
runtime->oss.trigger = 1;
|
|
runtime->start_threshold = 1;
|
|
cmd = SNDRV_PCM_IOCTL_START;
|
|
} else {
|
|
if (!runtime->oss.trigger)
|
|
goto _skip2;
|
|
runtime->oss.trigger = 0;
|
|
runtime->start_threshold = runtime->boundary;
|
|
cmd = SNDRV_PCM_IOCTL_DROP;
|
|
runtime->oss.prepare = 1;
|
|
}
|
|
_skip2:
|
|
mutex_unlock(&runtime->oss.params_lock);
|
|
if (cmd) {
|
|
err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
|
|
int result = 0;
|
|
|
|
psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
|
|
result |= PCM_ENABLE_OUTPUT;
|
|
if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
|
|
result |= PCM_ENABLE_INPUT;
|
|
return result;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
struct snd_pcm_runtime *runtime;
|
|
snd_pcm_sframes_t delay;
|
|
int err;
|
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream == NULL)
|
|
return -EINVAL;
|
|
err = snd_pcm_oss_make_ready(substream);
|
|
if (err < 0)
|
|
return err;
|
|
runtime = substream->runtime;
|
|
if (runtime->oss.params || runtime->oss.prepare)
|
|
return 0;
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
|
|
if (err == -EPIPE)
|
|
delay = 0; /* hack for broken OSS applications */
|
|
else if (err < 0)
|
|
return err;
|
|
return snd_pcm_oss_bytes(substream, delay);
|
|
}
|
|
|
|
static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
struct snd_pcm_runtime *runtime;
|
|
snd_pcm_sframes_t delay;
|
|
int fixup;
|
|
struct count_info info;
|
|
int err;
|
|
|
|
if (_info == NULL)
|
|
return -EFAULT;
|
|
substream = pcm_oss_file->streams[stream];
|
|
if (substream == NULL)
|
|
return -EINVAL;
|
|
err = snd_pcm_oss_make_ready(substream);
|
|
if (err < 0)
|
|
return err;
|
|
runtime = substream->runtime;
|
|
if (runtime->oss.params || runtime->oss.prepare) {
|
|
memset(&info, 0, sizeof(info));
|
|
if (copy_to_user(_info, &info, sizeof(info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
|
|
if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
|
|
err = 0;
|
|
delay = 0;
|
|
fixup = 0;
|
|
} else {
|
|
fixup = runtime->oss.buffer_used;
|
|
}
|
|
} else {
|
|
err = snd_pcm_oss_capture_position_fixup(substream, &delay);
|
|
fixup = -runtime->oss.buffer_used;
|
|
}
|
|
if (err < 0)
|
|
return err;
|
|
info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
|
|
if (atomic_read(&substream->mmap_count)) {
|
|
snd_pcm_sframes_t n;
|
|
delay = get_hw_ptr_period(runtime);
|
|
n = delay - runtime->oss.prev_hw_ptr_period;
|
|
if (n < 0)
|
|
n += runtime->boundary;
|
|
info.blocks = n / runtime->period_size;
|
|
runtime->oss.prev_hw_ptr_period = delay;
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
snd_pcm_oss_simulate_fill(substream, delay);
|
|
info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
|
|
} else {
|
|
delay = snd_pcm_oss_bytes(substream, delay);
|
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
if (substream->oss.setup.buggyptr)
|
|
info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
|
|
else
|
|
info.blocks = (delay + fixup) / runtime->oss.period_bytes;
|
|
info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
|
|
} else {
|
|
delay += fixup;
|
|
info.blocks = delay / runtime->oss.period_bytes;
|
|
info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
|
|
}
|
|
}
|
|
if (copy_to_user(_info, &info, sizeof(info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
struct snd_pcm_runtime *runtime;
|
|
snd_pcm_sframes_t avail;
|
|
int fixup;
|
|
struct audio_buf_info info;
|
|
int err;
|
|
|
|
if (_info == NULL)
|
|
return -EFAULT;
|
|
substream = pcm_oss_file->streams[stream];
|
|
if (substream == NULL)
|
|
return -EINVAL;
|
|
runtime = substream->runtime;
|
|
|
|
if (runtime->oss.params) {
|
|
err = snd_pcm_oss_change_params(substream, false);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
info.fragsize = runtime->oss.period_bytes;
|
|
info.fragstotal = runtime->periods;
|
|
if (runtime->oss.prepare) {
|
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
|
|
info.fragments = runtime->oss.periods;
|
|
} else {
|
|
info.bytes = 0;
|
|
info.fragments = 0;
|
|
}
|
|
} else {
|
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
|
|
if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
|
|
avail = runtime->buffer_size;
|
|
err = 0;
|
|
fixup = 0;
|
|
} else {
|
|
avail = runtime->buffer_size - avail;
|
|
fixup = -runtime->oss.buffer_used;
|
|
}
|
|
} else {
|
|
err = snd_pcm_oss_capture_position_fixup(substream, &avail);
|
|
fixup = runtime->oss.buffer_used;
|
|
}
|
|
if (err < 0)
|
|
return err;
|
|
info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
|
|
info.fragments = info.bytes / runtime->oss.period_bytes;
|
|
}
|
|
|
|
#ifdef OSS_DEBUG
|
|
pcm_dbg(substream->pcm,
|
|
"pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
|
|
info.bytes, info.fragments, info.fragstotal, info.fragsize);
|
|
#endif
|
|
if (copy_to_user(_info, &info, sizeof(info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
|
|
{
|
|
// it won't be probably implemented
|
|
// pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const char *strip_task_path(const char *path)
|
|
{
|
|
const char *ptr, *ptrl = NULL;
|
|
for (ptr = path; *ptr; ptr++) {
|
|
if (*ptr == '/')
|
|
ptrl = ptr + 1;
|
|
}
|
|
return ptrl;
|
|
}
|
|
|
|
static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
|
|
const char *task_name,
|
|
struct snd_pcm_oss_setup *rsetup)
|
|
{
|
|
struct snd_pcm_oss_setup *setup;
|
|
|
|
mutex_lock(&pcm->streams[stream].oss.setup_mutex);
|
|
do {
|
|
for (setup = pcm->streams[stream].oss.setup_list; setup;
|
|
setup = setup->next) {
|
|
if (!strcmp(setup->task_name, task_name))
|
|
goto out;
|
|
}
|
|
} while ((task_name = strip_task_path(task_name)) != NULL);
|
|
out:
|
|
if (setup)
|
|
*rsetup = *setup;
|
|
mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
|
|
}
|
|
|
|
static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime;
|
|
runtime = substream->runtime;
|
|
kvfree(runtime->oss.buffer);
|
|
runtime->oss.buffer = NULL;
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
|
|
snd_pcm_oss_plugin_clear(substream);
|
|
#endif
|
|
substream->oss.oss = 0;
|
|
}
|
|
|
|
static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_oss_setup *setup,
|
|
int minor)
|
|
{
|
|
struct snd_pcm_runtime *runtime;
|
|
|
|
substream->oss.oss = 1;
|
|
substream->oss.setup = *setup;
|
|
if (setup->nonblock)
|
|
substream->f_flags |= O_NONBLOCK;
|
|
else if (setup->block)
|
|
substream->f_flags &= ~O_NONBLOCK;
|
|
runtime = substream->runtime;
|
|
runtime->oss.params = 1;
|
|
runtime->oss.trigger = 1;
|
|
runtime->oss.rate = 8000;
|
|
mutex_init(&runtime->oss.params_lock);
|
|
switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
|
|
case SNDRV_MINOR_OSS_PCM_8:
|
|
runtime->oss.format = AFMT_U8;
|
|
break;
|
|
case SNDRV_MINOR_OSS_PCM_16:
|
|
runtime->oss.format = AFMT_S16_LE;
|
|
break;
|
|
default:
|
|
runtime->oss.format = AFMT_MU_LAW;
|
|
}
|
|
runtime->oss.channels = 1;
|
|
runtime->oss.fragshift = 0;
|
|
runtime->oss.maxfrags = 0;
|
|
runtime->oss.subdivision = 0;
|
|
substream->pcm_release = snd_pcm_oss_release_substream;
|
|
atomic_set(&runtime->oss.rw_ref, 0);
|
|
}
|
|
|
|
static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
|
|
{
|
|
int cidx;
|
|
if (!pcm_oss_file)
|
|
return 0;
|
|
for (cidx = 0; cidx < 2; ++cidx) {
|
|
struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
|
|
if (substream)
|
|
snd_pcm_release_substream(substream);
|
|
}
|
|
kfree(pcm_oss_file);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_open_file(struct file *file,
|
|
struct snd_pcm *pcm,
|
|
struct snd_pcm_oss_file **rpcm_oss_file,
|
|
int minor,
|
|
struct snd_pcm_oss_setup *setup)
|
|
{
|
|
int idx, err;
|
|
struct snd_pcm_oss_file *pcm_oss_file;
|
|
struct snd_pcm_substream *substream;
|
|
fmode_t f_mode = file->f_mode;
|
|
|
|
if (rpcm_oss_file)
|
|
*rpcm_oss_file = NULL;
|
|
|
|
pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
|
|
if (pcm_oss_file == NULL)
|
|
return -ENOMEM;
|
|
|
|
if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
|
|
(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
|
|
f_mode = FMODE_WRITE;
|
|
|
|
file->f_flags &= ~O_APPEND;
|
|
for (idx = 0; idx < 2; idx++) {
|
|
if (setup[idx].disable)
|
|
continue;
|
|
if (! pcm->streams[idx].substream_count)
|
|
continue; /* no matching substream */
|
|
if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
if (! (f_mode & FMODE_WRITE))
|
|
continue;
|
|
} else {
|
|
if (! (f_mode & FMODE_READ))
|
|
continue;
|
|
}
|
|
err = snd_pcm_open_substream(pcm, idx, file, &substream);
|
|
if (err < 0) {
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
return err;
|
|
}
|
|
|
|
pcm_oss_file->streams[idx] = substream;
|
|
snd_pcm_oss_init_substream(substream, &setup[idx], minor);
|
|
}
|
|
|
|
if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
return -EINVAL;
|
|
}
|
|
|
|
file->private_data = pcm_oss_file;
|
|
if (rpcm_oss_file)
|
|
*rpcm_oss_file = pcm_oss_file;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int snd_task_name(struct task_struct *task, char *name, size_t size)
|
|
{
|
|
unsigned int idx;
|
|
|
|
if (snd_BUG_ON(!task || !name || size < 2))
|
|
return -EINVAL;
|
|
for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
|
|
name[idx] = task->comm[idx];
|
|
name[idx] = '\0';
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_open(struct inode *inode, struct file *file)
|
|
{
|
|
int err;
|
|
char task_name[32];
|
|
struct snd_pcm *pcm;
|
|
struct snd_pcm_oss_file *pcm_oss_file;
|
|
struct snd_pcm_oss_setup setup[2];
|
|
int nonblock;
|
|
wait_queue_entry_t wait;
|
|
|
|
err = nonseekable_open(inode, file);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
pcm = snd_lookup_oss_minor_data(iminor(inode),
|
|
SNDRV_OSS_DEVICE_TYPE_PCM);
|
|
if (pcm == NULL) {
|
|
err = -ENODEV;
|
|
goto __error1;
|
|
}
|
|
err = snd_card_file_add(pcm->card, file);
|
|
if (err < 0)
|
|
goto __error1;
|
|
if (!try_module_get(pcm->card->module)) {
|
|
err = -EFAULT;
|
|
goto __error2;
|
|
}
|
|
if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
|
|
err = -EFAULT;
|
|
goto __error;
|
|
}
|
|
memset(setup, 0, sizeof(setup));
|
|
if (file->f_mode & FMODE_WRITE)
|
|
snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
|
|
task_name, &setup[0]);
|
|
if (file->f_mode & FMODE_READ)
|
|
snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
|
|
task_name, &setup[1]);
|
|
|
|
nonblock = !!(file->f_flags & O_NONBLOCK);
|
|
if (!nonblock)
|
|
nonblock = nonblock_open;
|
|
|
|
init_waitqueue_entry(&wait, current);
|
|
add_wait_queue(&pcm->open_wait, &wait);
|
|
mutex_lock(&pcm->open_mutex);
|
|
while (1) {
|
|
err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
|
|
iminor(inode), setup);
|
|
if (err >= 0)
|
|
break;
|
|
if (err == -EAGAIN) {
|
|
if (nonblock) {
|
|
err = -EBUSY;
|
|
break;
|
|
}
|
|
} else
|
|
break;
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
mutex_unlock(&pcm->open_mutex);
|
|
schedule();
|
|
mutex_lock(&pcm->open_mutex);
|
|
if (pcm->card->shutdown) {
|
|
err = -ENODEV;
|
|
break;
|
|
}
|
|
if (signal_pending(current)) {
|
|
err = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
}
|
|
remove_wait_queue(&pcm->open_wait, &wait);
|
|
mutex_unlock(&pcm->open_mutex);
|
|
if (err < 0)
|
|
goto __error;
|
|
snd_card_unref(pcm->card);
|
|
return err;
|
|
|
|
__error:
|
|
module_put(pcm->card->module);
|
|
__error2:
|
|
snd_card_file_remove(pcm->card, file);
|
|
__error1:
|
|
if (pcm)
|
|
snd_card_unref(pcm->card);
|
|
return err;
|
|
}
|
|
|
|
static int snd_pcm_oss_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct snd_pcm *pcm;
|
|
struct snd_pcm_substream *substream;
|
|
struct snd_pcm_oss_file *pcm_oss_file;
|
|
|
|
pcm_oss_file = file->private_data;
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream == NULL)
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
if (snd_BUG_ON(!substream))
|
|
return -ENXIO;
|
|
pcm = substream->pcm;
|
|
if (!pcm->card->shutdown)
|
|
snd_pcm_oss_sync(pcm_oss_file);
|
|
mutex_lock(&pcm->open_mutex);
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
mutex_unlock(&pcm->open_mutex);
|
|
wake_up(&pcm->open_wait);
|
|
module_put(pcm->card->module);
|
|
snd_card_file_remove(pcm->card, file);
|
|
return 0;
|
|
}
|
|
|
|
static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct snd_pcm_oss_file *pcm_oss_file;
|
|
int __user *p = (int __user *)arg;
|
|
int res;
|
|
|
|
pcm_oss_file = file->private_data;
|
|
if (cmd == OSS_GETVERSION)
|
|
return put_user(SNDRV_OSS_VERSION, p);
|
|
if (cmd == OSS_ALSAEMULVER)
|
|
return put_user(1, p);
|
|
#if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
|
|
if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
|
|
struct snd_pcm_substream *substream;
|
|
int idx;
|
|
for (idx = 0; idx < 2; ++idx) {
|
|
substream = pcm_oss_file->streams[idx];
|
|
if (substream != NULL)
|
|
break;
|
|
}
|
|
if (snd_BUG_ON(idx >= 2))
|
|
return -ENXIO;
|
|
return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
|
|
}
|
|
#endif
|
|
if (((cmd >> 8) & 0xff) != 'P')
|
|
return -EINVAL;
|
|
#ifdef OSS_DEBUG
|
|
pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
|
|
#endif
|
|
switch (cmd) {
|
|
case SNDCTL_DSP_RESET:
|
|
return snd_pcm_oss_reset(pcm_oss_file);
|
|
case SNDCTL_DSP_SYNC:
|
|
return snd_pcm_oss_sync(pcm_oss_file);
|
|
case SNDCTL_DSP_SPEED:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
res = snd_pcm_oss_set_rate(pcm_oss_file, res);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SOUND_PCM_READ_RATE:
|
|
res = snd_pcm_oss_get_rate(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_STEREO:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
res = res > 0 ? 2 : 1;
|
|
res = snd_pcm_oss_set_channels(pcm_oss_file, res);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(--res, p);
|
|
case SNDCTL_DSP_GETBLKSIZE:
|
|
res = snd_pcm_oss_get_block_size(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_SETFMT:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
res = snd_pcm_oss_set_format(pcm_oss_file, res);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SOUND_PCM_READ_BITS:
|
|
res = snd_pcm_oss_get_format(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_CHANNELS:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
res = snd_pcm_oss_set_channels(pcm_oss_file, res);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SOUND_PCM_READ_CHANNELS:
|
|
res = snd_pcm_oss_get_channels(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SOUND_PCM_WRITE_FILTER:
|
|
case SOUND_PCM_READ_FILTER:
|
|
return -EIO;
|
|
case SNDCTL_DSP_POST:
|
|
return snd_pcm_oss_post(pcm_oss_file);
|
|
case SNDCTL_DSP_SUBDIVIDE:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_SETFRAGMENT:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
return snd_pcm_oss_set_fragment(pcm_oss_file, res);
|
|
case SNDCTL_DSP_GETFMTS:
|
|
res = snd_pcm_oss_get_formats(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_GETOSPACE:
|
|
case SNDCTL_DSP_GETISPACE:
|
|
return snd_pcm_oss_get_space(pcm_oss_file,
|
|
cmd == SNDCTL_DSP_GETISPACE ?
|
|
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
|
|
(struct audio_buf_info __user *) arg);
|
|
case SNDCTL_DSP_NONBLOCK:
|
|
return snd_pcm_oss_nonblock(file);
|
|
case SNDCTL_DSP_GETCAPS:
|
|
res = snd_pcm_oss_get_caps(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_GETTRIGGER:
|
|
res = snd_pcm_oss_get_trigger(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_SETTRIGGER:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
return snd_pcm_oss_set_trigger(pcm_oss_file, res);
|
|
case SNDCTL_DSP_GETIPTR:
|
|
case SNDCTL_DSP_GETOPTR:
|
|
return snd_pcm_oss_get_ptr(pcm_oss_file,
|
|
cmd == SNDCTL_DSP_GETIPTR ?
|
|
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
|
|
(struct count_info __user *) arg);
|
|
case SNDCTL_DSP_MAPINBUF:
|
|
case SNDCTL_DSP_MAPOUTBUF:
|
|
return snd_pcm_oss_get_mapbuf(pcm_oss_file,
|
|
cmd == SNDCTL_DSP_MAPINBUF ?
|
|
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
|
|
(struct buffmem_desc __user *) arg);
|
|
case SNDCTL_DSP_SETSYNCRO:
|
|
/* stop DMA now.. */
|
|
return 0;
|
|
case SNDCTL_DSP_SETDUPLEX:
|
|
if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
|
|
return 0;
|
|
return -EIO;
|
|
case SNDCTL_DSP_GETODELAY:
|
|
res = snd_pcm_oss_get_odelay(pcm_oss_file);
|
|
if (res < 0) {
|
|
/* it's for sure, some broken apps don't check for error codes */
|
|
put_user(0, p);
|
|
return res;
|
|
}
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_PROFILE:
|
|
return 0; /* silently ignore */
|
|
default:
|
|
pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
/* all compatible */
|
|
static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
/*
|
|
* Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF,
|
|
* which are not implemented for the native case either
|
|
*/
|
|
return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
|
|
}
|
|
#else
|
|
#define snd_pcm_oss_ioctl_compat NULL
|
|
#endif
|
|
|
|
static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
|
|
{
|
|
struct snd_pcm_oss_file *pcm_oss_file;
|
|
struct snd_pcm_substream *substream;
|
|
|
|
pcm_oss_file = file->private_data;
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
if (substream == NULL)
|
|
return -ENXIO;
|
|
substream->f_flags = file->f_flags & O_NONBLOCK;
|
|
#ifndef OSS_DEBUG
|
|
return snd_pcm_oss_read1(substream, buf, count);
|
|
#else
|
|
{
|
|
ssize_t res = snd_pcm_oss_read1(substream, buf, count);
|
|
pcm_dbg(substream->pcm,
|
|
"pcm_oss: read %li bytes (returned %li bytes)\n",
|
|
(long)count, (long)res);
|
|
return res;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
|
|
{
|
|
struct snd_pcm_oss_file *pcm_oss_file;
|
|
struct snd_pcm_substream *substream;
|
|
long result;
|
|
|
|
pcm_oss_file = file->private_data;
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream == NULL)
|
|
return -ENXIO;
|
|
substream->f_flags = file->f_flags & O_NONBLOCK;
|
|
result = snd_pcm_oss_write1(substream, buf, count);
|
|
#ifdef OSS_DEBUG
|
|
pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
|
|
(long)count, (long)result);
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
if (atomic_read(&substream->mmap_count))
|
|
return runtime->oss.prev_hw_ptr_period !=
|
|
get_hw_ptr_period(runtime);
|
|
else
|
|
return snd_pcm_playback_avail(runtime) >=
|
|
runtime->oss.period_frames;
|
|
}
|
|
|
|
static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
if (atomic_read(&substream->mmap_count))
|
|
return runtime->oss.prev_hw_ptr_period !=
|
|
get_hw_ptr_period(runtime);
|
|
else
|
|
return snd_pcm_capture_avail(runtime) >=
|
|
runtime->oss.period_frames;
|
|
}
|
|
|
|
static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
|
|
{
|
|
struct snd_pcm_oss_file *pcm_oss_file;
|
|
__poll_t mask;
|
|
struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
|
|
|
|
pcm_oss_file = file->private_data;
|
|
|
|
psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
|
|
mask = 0;
|
|
if (psubstream != NULL) {
|
|
struct snd_pcm_runtime *runtime = psubstream->runtime;
|
|
poll_wait(file, &runtime->sleep, wait);
|
|
snd_pcm_stream_lock_irq(psubstream);
|
|
if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
|
|
(runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
|
|
snd_pcm_oss_playback_ready(psubstream)))
|
|
mask |= EPOLLOUT | EPOLLWRNORM;
|
|
snd_pcm_stream_unlock_irq(psubstream);
|
|
}
|
|
if (csubstream != NULL) {
|
|
struct snd_pcm_runtime *runtime = csubstream->runtime;
|
|
snd_pcm_state_t ostate;
|
|
poll_wait(file, &runtime->sleep, wait);
|
|
snd_pcm_stream_lock_irq(csubstream);
|
|
ostate = runtime->status->state;
|
|
if (ostate != SNDRV_PCM_STATE_RUNNING ||
|
|
snd_pcm_oss_capture_ready(csubstream))
|
|
mask |= EPOLLIN | EPOLLRDNORM;
|
|
snd_pcm_stream_unlock_irq(csubstream);
|
|
if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
|
|
struct snd_pcm_oss_file ofile;
|
|
memset(&ofile, 0, sizeof(ofile));
|
|
ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
runtime->oss.trigger = 0;
|
|
snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
|
|
}
|
|
}
|
|
|
|
return mask;
|
|
}
|
|
|
|
static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
|
|
{
|
|
struct snd_pcm_oss_file *pcm_oss_file;
|
|
struct snd_pcm_substream *substream = NULL;
|
|
struct snd_pcm_runtime *runtime;
|
|
int err;
|
|
|
|
#ifdef OSS_DEBUG
|
|
pr_debug("pcm_oss: mmap begin\n");
|
|
#endif
|
|
pcm_oss_file = file->private_data;
|
|
switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
|
|
case VM_READ | VM_WRITE:
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream)
|
|
break;
|
|
fallthrough;
|
|
case VM_READ:
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
break;
|
|
case VM_WRITE:
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
/* set VM_READ access as well to fix memset() routines that do
|
|
reads before writes (to improve performance) */
|
|
area->vm_flags |= VM_READ;
|
|
if (substream == NULL)
|
|
return -ENXIO;
|
|
runtime = substream->runtime;
|
|
if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
|
|
return -EIO;
|
|
if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
|
|
runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
|
|
else
|
|
return -EIO;
|
|
|
|
if (runtime->oss.params) {
|
|
/* use mutex_trylock() for params_lock for avoiding a deadlock
|
|
* between mmap_lock and params_lock taken by
|
|
* copy_from/to_user() in snd_pcm_oss_write/read()
|
|
*/
|
|
err = snd_pcm_oss_change_params(substream, true);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
|
|
if (runtime->oss.plugin_first != NULL)
|
|
return -EIO;
|
|
#endif
|
|
|
|
if (area->vm_pgoff != 0)
|
|
return -EINVAL;
|
|
|
|
err = snd_pcm_mmap_data(substream, file, area);
|
|
if (err < 0)
|
|
return err;
|
|
runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
|
|
runtime->silence_threshold = 0;
|
|
runtime->silence_size = 0;
|
|
#ifdef OSS_DEBUG
|
|
pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
|
|
runtime->oss.mmap_bytes);
|
|
#endif
|
|
/* In mmap mode we never stop */
|
|
runtime->stop_threshold = runtime->boundary;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_SND_VERBOSE_PROCFS
|
|
/*
|
|
* /proc interface
|
|
*/
|
|
|
|
static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_pcm_str *pstr = entry->private_data;
|
|
struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
|
|
mutex_lock(&pstr->oss.setup_mutex);
|
|
while (setup) {
|
|
snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
|
|
setup->task_name,
|
|
setup->periods,
|
|
setup->period_size,
|
|
setup->disable ? " disable" : "",
|
|
setup->direct ? " direct" : "",
|
|
setup->block ? " block" : "",
|
|
setup->nonblock ? " non-block" : "",
|
|
setup->partialfrag ? " partial-frag" : "",
|
|
setup->nosilence ? " no-silence" : "");
|
|
setup = setup->next;
|
|
}
|
|
mutex_unlock(&pstr->oss.setup_mutex);
|
|
}
|
|
|
|
static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
|
|
{
|
|
struct snd_pcm_oss_setup *setup, *setupn;
|
|
|
|
for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
|
|
setup; setup = setupn) {
|
|
setupn = setup->next;
|
|
kfree(setup->task_name);
|
|
kfree(setup);
|
|
}
|
|
pstr->oss.setup_list = NULL;
|
|
}
|
|
|
|
static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_pcm_str *pstr = entry->private_data;
|
|
char line[128], str[32], task_name[32];
|
|
const char *ptr;
|
|
int idx1;
|
|
struct snd_pcm_oss_setup *setup, *setup1, template;
|
|
|
|
while (!snd_info_get_line(buffer, line, sizeof(line))) {
|
|
mutex_lock(&pstr->oss.setup_mutex);
|
|
memset(&template, 0, sizeof(template));
|
|
ptr = snd_info_get_str(task_name, line, sizeof(task_name));
|
|
if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
|
|
snd_pcm_oss_proc_free_setup_list(pstr);
|
|
mutex_unlock(&pstr->oss.setup_mutex);
|
|
continue;
|
|
}
|
|
for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
|
|
if (!strcmp(setup->task_name, task_name)) {
|
|
template = *setup;
|
|
break;
|
|
}
|
|
}
|
|
ptr = snd_info_get_str(str, ptr, sizeof(str));
|
|
template.periods = simple_strtoul(str, NULL, 10);
|
|
ptr = snd_info_get_str(str, ptr, sizeof(str));
|
|
template.period_size = simple_strtoul(str, NULL, 10);
|
|
for (idx1 = 31; idx1 >= 0; idx1--)
|
|
if (template.period_size & (1 << idx1))
|
|
break;
|
|
for (idx1--; idx1 >= 0; idx1--)
|
|
template.period_size &= ~(1 << idx1);
|
|
do {
|
|
ptr = snd_info_get_str(str, ptr, sizeof(str));
|
|
if (!strcmp(str, "disable")) {
|
|
template.disable = 1;
|
|
} else if (!strcmp(str, "direct")) {
|
|
template.direct = 1;
|
|
} else if (!strcmp(str, "block")) {
|
|
template.block = 1;
|
|
} else if (!strcmp(str, "non-block")) {
|
|
template.nonblock = 1;
|
|
} else if (!strcmp(str, "partial-frag")) {
|
|
template.partialfrag = 1;
|
|
} else if (!strcmp(str, "no-silence")) {
|
|
template.nosilence = 1;
|
|
} else if (!strcmp(str, "buggy-ptr")) {
|
|
template.buggyptr = 1;
|
|
}
|
|
} while (*str);
|
|
if (setup == NULL) {
|
|
setup = kmalloc(sizeof(*setup), GFP_KERNEL);
|
|
if (! setup) {
|
|
buffer->error = -ENOMEM;
|
|
mutex_unlock(&pstr->oss.setup_mutex);
|
|
return;
|
|
}
|
|
if (pstr->oss.setup_list == NULL)
|
|
pstr->oss.setup_list = setup;
|
|
else {
|
|
for (setup1 = pstr->oss.setup_list;
|
|
setup1->next; setup1 = setup1->next);
|
|
setup1->next = setup;
|
|
}
|
|
template.task_name = kstrdup(task_name, GFP_KERNEL);
|
|
if (! template.task_name) {
|
|
kfree(setup);
|
|
buffer->error = -ENOMEM;
|
|
mutex_unlock(&pstr->oss.setup_mutex);
|
|
return;
|
|
}
|
|
}
|
|
*setup = template;
|
|
mutex_unlock(&pstr->oss.setup_mutex);
|
|
}
|
|
}
|
|
|
|
static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
|
|
{
|
|
int stream;
|
|
for (stream = 0; stream < 2; ++stream) {
|
|
struct snd_info_entry *entry;
|
|
struct snd_pcm_str *pstr = &pcm->streams[stream];
|
|
if (pstr->substream_count == 0)
|
|
continue;
|
|
entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root);
|
|
if (entry) {
|
|
entry->content = SNDRV_INFO_CONTENT_TEXT;
|
|
entry->mode = S_IFREG | 0644;
|
|
entry->c.text.read = snd_pcm_oss_proc_read;
|
|
entry->c.text.write = snd_pcm_oss_proc_write;
|
|
entry->private_data = pstr;
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
pstr->oss.proc_entry = entry;
|
|
}
|
|
}
|
|
|
|
static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
|
|
{
|
|
int stream;
|
|
for (stream = 0; stream < 2; ++stream) {
|
|
struct snd_pcm_str *pstr = &pcm->streams[stream];
|
|
snd_info_free_entry(pstr->oss.proc_entry);
|
|
pstr->oss.proc_entry = NULL;
|
|
snd_pcm_oss_proc_free_setup_list(pstr);
|
|
}
|
|
}
|
|
#else /* !CONFIG_SND_VERBOSE_PROCFS */
|
|
static inline void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
|
|
{
|
|
}
|
|
static inline void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
|
|
{
|
|
}
|
|
#endif /* CONFIG_SND_VERBOSE_PROCFS */
|
|
|
|
/*
|
|
* ENTRY functions
|
|
*/
|
|
|
|
static const struct file_operations snd_pcm_oss_f_reg =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.read = snd_pcm_oss_read,
|
|
.write = snd_pcm_oss_write,
|
|
.open = snd_pcm_oss_open,
|
|
.release = snd_pcm_oss_release,
|
|
.llseek = no_llseek,
|
|
.poll = snd_pcm_oss_poll,
|
|
.unlocked_ioctl = snd_pcm_oss_ioctl,
|
|
.compat_ioctl = snd_pcm_oss_ioctl_compat,
|
|
.mmap = snd_pcm_oss_mmap,
|
|
};
|
|
|
|
static void register_oss_dsp(struct snd_pcm *pcm, int index)
|
|
{
|
|
if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
|
|
pcm->card, index, &snd_pcm_oss_f_reg,
|
|
pcm) < 0) {
|
|
pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
|
|
pcm->card->number, pcm->device);
|
|
}
|
|
}
|
|
|
|
static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
|
|
{
|
|
pcm->oss.reg = 0;
|
|
if (dsp_map[pcm->card->number] == (int)pcm->device) {
|
|
char name[128];
|
|
int duplex;
|
|
register_oss_dsp(pcm, 0);
|
|
duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
|
|
pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
|
|
!(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
|
|
sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
|
|
#ifdef SNDRV_OSS_INFO_DEV_AUDIO
|
|
snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
|
|
pcm->card->number,
|
|
name);
|
|
#endif
|
|
pcm->oss.reg++;
|
|
pcm->oss.reg_mask |= 1;
|
|
}
|
|
if (adsp_map[pcm->card->number] == (int)pcm->device) {
|
|
register_oss_dsp(pcm, 1);
|
|
pcm->oss.reg++;
|
|
pcm->oss.reg_mask |= 2;
|
|
}
|
|
|
|
if (pcm->oss.reg)
|
|
snd_pcm_oss_proc_init(pcm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
|
|
{
|
|
if (pcm->oss.reg) {
|
|
if (pcm->oss.reg_mask & 1) {
|
|
pcm->oss.reg_mask &= ~1;
|
|
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
|
|
pcm->card, 0);
|
|
}
|
|
if (pcm->oss.reg_mask & 2) {
|
|
pcm->oss.reg_mask &= ~2;
|
|
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
|
|
pcm->card, 1);
|
|
}
|
|
if (dsp_map[pcm->card->number] == (int)pcm->device) {
|
|
#ifdef SNDRV_OSS_INFO_DEV_AUDIO
|
|
snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
|
|
#endif
|
|
}
|
|
pcm->oss.reg = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
|
|
{
|
|
snd_pcm_oss_disconnect_minor(pcm);
|
|
snd_pcm_oss_proc_done(pcm);
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_pcm_notify snd_pcm_oss_notify =
|
|
{
|
|
.n_register = snd_pcm_oss_register_minor,
|
|
.n_disconnect = snd_pcm_oss_disconnect_minor,
|
|
.n_unregister = snd_pcm_oss_unregister_minor,
|
|
};
|
|
|
|
static int __init alsa_pcm_oss_init(void)
|
|
{
|
|
int i;
|
|
int err;
|
|
|
|
/* check device map table */
|
|
for (i = 0; i < SNDRV_CARDS; i++) {
|
|
if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
|
|
pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
|
|
i, dsp_map[i]);
|
|
dsp_map[i] = 0;
|
|
}
|
|
if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
|
|
pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
|
|
i, adsp_map[i]);
|
|
adsp_map[i] = 1;
|
|
}
|
|
}
|
|
err = snd_pcm_notify(&snd_pcm_oss_notify, 0);
|
|
if (err < 0)
|
|
return err;
|
|
return 0;
|
|
}
|
|
|
|
static void __exit alsa_pcm_oss_exit(void)
|
|
{
|
|
snd_pcm_notify(&snd_pcm_oss_notify, 1);
|
|
}
|
|
|
|
module_init(alsa_pcm_oss_init)
|
|
module_exit(alsa_pcm_oss_exit)
|