1055 строки
37 KiB
C
1055 строки
37 KiB
C
#ifndef __SOUND_PCM_H
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#define __SOUND_PCM_H
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/*
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* Digital Audio (PCM) abstract layer
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* Abramo Bagnara <abramo@alsa-project.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/asound.h>
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#include <sound/memalloc.h>
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#include <sound/minors.h>
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#include <linux/poll.h>
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#include <linux/mm.h>
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#include <linux/bitops.h>
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#include <linux/pm_qos_params.h>
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#define snd_pcm_substream_chip(substream) ((substream)->private_data)
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#define snd_pcm_chip(pcm) ((pcm)->private_data)
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#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
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#include "pcm_oss.h"
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#endif
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/*
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* Hardware (lowlevel) section
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*/
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struct snd_pcm_hardware {
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unsigned int info; /* SNDRV_PCM_INFO_* */
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u64 formats; /* SNDRV_PCM_FMTBIT_* */
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unsigned int rates; /* SNDRV_PCM_RATE_* */
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unsigned int rate_min; /* min rate */
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unsigned int rate_max; /* max rate */
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unsigned int channels_min; /* min channels */
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unsigned int channels_max; /* max channels */
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size_t buffer_bytes_max; /* max buffer size */
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size_t period_bytes_min; /* min period size */
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size_t period_bytes_max; /* max period size */
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unsigned int periods_min; /* min # of periods */
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unsigned int periods_max; /* max # of periods */
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size_t fifo_size; /* fifo size in bytes */
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};
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struct snd_pcm_substream;
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struct snd_pcm_ops {
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int (*open)(struct snd_pcm_substream *substream);
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int (*close)(struct snd_pcm_substream *substream);
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int (*ioctl)(struct snd_pcm_substream * substream,
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unsigned int cmd, void *arg);
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int (*hw_params)(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params);
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int (*hw_free)(struct snd_pcm_substream *substream);
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int (*prepare)(struct snd_pcm_substream *substream);
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int (*trigger)(struct snd_pcm_substream *substream, int cmd);
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snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
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int (*copy)(struct snd_pcm_substream *substream, int channel,
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snd_pcm_uframes_t pos,
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void __user *buf, snd_pcm_uframes_t count);
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int (*silence)(struct snd_pcm_substream *substream, int channel,
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snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
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struct page *(*page)(struct snd_pcm_substream *substream,
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unsigned long offset);
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int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
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int (*ack)(struct snd_pcm_substream *substream);
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};
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/*
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*
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*/
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#if defined(CONFIG_SND_DYNAMIC_MINORS)
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#define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2)
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#else
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#define SNDRV_PCM_DEVICES 8
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#endif
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#define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
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#define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
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#define SNDRV_PCM_IOCTL1_RESET 0
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#define SNDRV_PCM_IOCTL1_INFO 1
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#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
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#define SNDRV_PCM_IOCTL1_GSTATE 3
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#define SNDRV_PCM_IOCTL1_FIFO_SIZE 4
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#define SNDRV_PCM_TRIGGER_STOP 0
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#define SNDRV_PCM_TRIGGER_START 1
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#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
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#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
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#define SNDRV_PCM_TRIGGER_SUSPEND 5
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#define SNDRV_PCM_TRIGGER_RESUME 6
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#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
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/* If you change this don't forget to change rates[] table in pcm_native.c */
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#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
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#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
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#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
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#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
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#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
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#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
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#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
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#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
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#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
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#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
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#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
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#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
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#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
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#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
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#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
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#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
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SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
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SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
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#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
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#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
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SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
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#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
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SNDRV_PCM_RATE_192000)
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#define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt)
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#define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8)
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#define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8)
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#define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE)
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#define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE)
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#define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE)
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#define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE)
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#define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE)
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#define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE)
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#define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE)
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#define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE)
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#define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE)
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#define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE)
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#define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE)
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#define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE)
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#define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE)
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#define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE)
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#define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE)
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#define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE)
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#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE)
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#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE)
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#define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW)
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#define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW)
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#define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM)
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#define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG)
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#define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM)
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#define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL)
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#define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE)
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#define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE)
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#define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE)
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#define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE)
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#define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE)
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#define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE)
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#define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE)
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#define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE)
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#define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE)
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#define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE)
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#define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE)
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#define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE)
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#define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24)
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#define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B)
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#define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40)
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#define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B)
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#ifdef SNDRV_LITTLE_ENDIAN
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#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
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#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
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#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
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#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
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#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
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#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
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#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
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#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
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#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
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#endif
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#ifdef SNDRV_BIG_ENDIAN
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#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
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#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
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#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
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#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
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#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
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#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
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#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
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#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
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#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
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#endif
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struct snd_pcm_file {
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struct snd_pcm_substream *substream;
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int no_compat_mmap;
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};
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struct snd_pcm_hw_rule;
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typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
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struct snd_pcm_hw_rule *rule);
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struct snd_pcm_hw_rule {
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unsigned int cond;
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snd_pcm_hw_rule_func_t func;
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int var;
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int deps[4];
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void *private;
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};
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struct snd_pcm_hw_constraints {
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struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
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SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
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struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
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SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
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unsigned int rules_num;
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unsigned int rules_all;
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struct snd_pcm_hw_rule *rules;
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};
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static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
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snd_pcm_hw_param_t var)
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{
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return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
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}
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static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
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snd_pcm_hw_param_t var)
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{
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return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
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}
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struct snd_ratnum {
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unsigned int num;
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unsigned int den_min, den_max, den_step;
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};
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struct snd_ratden {
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unsigned int num_min, num_max, num_step;
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unsigned int den;
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};
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struct snd_pcm_hw_constraint_ratnums {
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int nrats;
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struct snd_ratnum *rats;
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};
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struct snd_pcm_hw_constraint_ratdens {
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int nrats;
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struct snd_ratden *rats;
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};
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struct snd_pcm_hw_constraint_list {
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unsigned int count;
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unsigned int *list;
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unsigned int mask;
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};
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struct snd_pcm_hwptr_log;
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struct snd_pcm_runtime {
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/* -- Status -- */
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struct snd_pcm_substream *trigger_master;
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struct timespec trigger_tstamp; /* trigger timestamp */
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int overrange;
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snd_pcm_uframes_t avail_max;
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snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
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snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
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unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
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unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */
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snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
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/* -- HW params -- */
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snd_pcm_access_t access; /* access mode */
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snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
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snd_pcm_subformat_t subformat; /* subformat */
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unsigned int rate; /* rate in Hz */
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unsigned int channels; /* channels */
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snd_pcm_uframes_t period_size; /* period size */
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unsigned int periods; /* periods */
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snd_pcm_uframes_t buffer_size; /* buffer size */
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snd_pcm_uframes_t min_align; /* Min alignment for the format */
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size_t byte_align;
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unsigned int frame_bits;
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unsigned int sample_bits;
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unsigned int info;
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unsigned int rate_num;
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unsigned int rate_den;
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unsigned int no_period_wakeup: 1;
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/* -- SW params -- */
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int tstamp_mode; /* mmap timestamp is updated */
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unsigned int period_step;
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snd_pcm_uframes_t start_threshold;
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snd_pcm_uframes_t stop_threshold;
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snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
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noise is nearest than this */
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snd_pcm_uframes_t silence_size; /* Silence filling size */
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snd_pcm_uframes_t boundary; /* pointers wrap point */
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snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
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snd_pcm_uframes_t silence_filled; /* size filled with silence */
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union snd_pcm_sync_id sync; /* hardware synchronization ID */
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/* -- mmap -- */
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struct snd_pcm_mmap_status *status;
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struct snd_pcm_mmap_control *control;
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/* -- locking / scheduling -- */
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snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */
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wait_queue_head_t sleep; /* poll sleep */
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wait_queue_head_t tsleep; /* transfer sleep */
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struct fasync_struct *fasync;
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/* -- private section -- */
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void *private_data;
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void (*private_free)(struct snd_pcm_runtime *runtime);
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/* -- hardware description -- */
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struct snd_pcm_hardware hw;
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struct snd_pcm_hw_constraints hw_constraints;
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/* -- interrupt callbacks -- */
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void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
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void (*transfer_ack_end)(struct snd_pcm_substream *substream);
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/* -- timer -- */
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unsigned int timer_resolution; /* timer resolution */
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int tstamp_type; /* timestamp type */
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/* -- DMA -- */
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unsigned char *dma_area; /* DMA area */
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dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
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size_t dma_bytes; /* size of DMA area */
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struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
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#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
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/* -- OSS things -- */
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struct snd_pcm_oss_runtime oss;
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#endif
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#ifdef CONFIG_SND_PCM_XRUN_DEBUG
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struct snd_pcm_hwptr_log *hwptr_log;
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#endif
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};
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struct snd_pcm_group { /* keep linked substreams */
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spinlock_t lock;
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struct list_head substreams;
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int count;
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};
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struct pid;
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struct snd_pcm_substream {
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struct snd_pcm *pcm;
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struct snd_pcm_str *pstr;
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void *private_data; /* copied from pcm->private_data */
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int number;
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char name[32]; /* substream name */
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int stream; /* stream (direction) */
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struct pm_qos_request_list latency_pm_qos_req; /* pm_qos request */
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size_t buffer_bytes_max; /* limit ring buffer size */
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struct snd_dma_buffer dma_buffer;
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unsigned int dma_buf_id;
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size_t dma_max;
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/* -- hardware operations -- */
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struct snd_pcm_ops *ops;
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/* -- runtime information -- */
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struct snd_pcm_runtime *runtime;
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/* -- timer section -- */
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struct snd_timer *timer; /* timer */
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unsigned timer_running: 1; /* time is running */
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/* -- next substream -- */
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struct snd_pcm_substream *next;
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/* -- linked substreams -- */
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struct list_head link_list; /* linked list member */
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struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
|
|
struct snd_pcm_group *group; /* pointer to current group */
|
|
/* -- assigned files -- */
|
|
void *file;
|
|
int ref_count;
|
|
atomic_t mmap_count;
|
|
unsigned int f_flags;
|
|
void (*pcm_release)(struct snd_pcm_substream *);
|
|
struct pid *pid;
|
|
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
|
|
/* -- OSS things -- */
|
|
struct snd_pcm_oss_substream oss;
|
|
#endif
|
|
#ifdef CONFIG_SND_VERBOSE_PROCFS
|
|
struct snd_info_entry *proc_root;
|
|
struct snd_info_entry *proc_info_entry;
|
|
struct snd_info_entry *proc_hw_params_entry;
|
|
struct snd_info_entry *proc_sw_params_entry;
|
|
struct snd_info_entry *proc_status_entry;
|
|
struct snd_info_entry *proc_prealloc_entry;
|
|
struct snd_info_entry *proc_prealloc_max_entry;
|
|
#endif
|
|
/* misc flags */
|
|
unsigned int hw_opened: 1;
|
|
};
|
|
|
|
#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
|
|
|
|
|
|
struct snd_pcm_str {
|
|
int stream; /* stream (direction) */
|
|
struct snd_pcm *pcm;
|
|
/* -- substreams -- */
|
|
unsigned int substream_count;
|
|
unsigned int substream_opened;
|
|
struct snd_pcm_substream *substream;
|
|
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
|
|
/* -- OSS things -- */
|
|
struct snd_pcm_oss_stream oss;
|
|
#endif
|
|
#ifdef CONFIG_SND_VERBOSE_PROCFS
|
|
struct snd_info_entry *proc_root;
|
|
struct snd_info_entry *proc_info_entry;
|
|
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
|
|
unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
|
|
struct snd_info_entry *proc_xrun_debug_entry;
|
|
#endif
|
|
#endif
|
|
};
|
|
|
|
struct snd_pcm {
|
|
struct snd_card *card;
|
|
struct list_head list;
|
|
int device; /* device number */
|
|
unsigned int info_flags;
|
|
unsigned short dev_class;
|
|
unsigned short dev_subclass;
|
|
char id[64];
|
|
char name[80];
|
|
struct snd_pcm_str streams[2];
|
|
struct mutex open_mutex;
|
|
wait_queue_head_t open_wait;
|
|
void *private_data;
|
|
void (*private_free) (struct snd_pcm *pcm);
|
|
struct device *dev; /* actual hw device this belongs to */
|
|
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
|
|
struct snd_pcm_oss oss;
|
|
#endif
|
|
};
|
|
|
|
struct snd_pcm_notify {
|
|
int (*n_register) (struct snd_pcm * pcm);
|
|
int (*n_disconnect) (struct snd_pcm * pcm);
|
|
int (*n_unregister) (struct snd_pcm * pcm);
|
|
struct list_head list;
|
|
};
|
|
|
|
/*
|
|
* Registering
|
|
*/
|
|
|
|
extern const struct file_operations snd_pcm_f_ops[2];
|
|
|
|
int snd_pcm_new(struct snd_card *card, const char *id, int device,
|
|
int playback_count, int capture_count,
|
|
struct snd_pcm **rpcm);
|
|
int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
|
|
|
|
int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
|
|
|
|
/*
|
|
* Native I/O
|
|
*/
|
|
|
|
extern rwlock_t snd_pcm_link_rwlock;
|
|
|
|
int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
|
|
int snd_pcm_info_user(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_info __user *info);
|
|
int snd_pcm_status(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_status *status);
|
|
int snd_pcm_start(struct snd_pcm_substream *substream);
|
|
int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status);
|
|
int snd_pcm_drain_done(struct snd_pcm_substream *substream);
|
|
#ifdef CONFIG_PM
|
|
int snd_pcm_suspend(struct snd_pcm_substream *substream);
|
|
int snd_pcm_suspend_all(struct snd_pcm *pcm);
|
|
#endif
|
|
int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
|
|
int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
|
|
struct snd_pcm_substream **rsubstream);
|
|
void snd_pcm_release_substream(struct snd_pcm_substream *substream);
|
|
int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
|
|
struct snd_pcm_substream **rsubstream);
|
|
void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
|
|
void snd_pcm_vma_notify_data(void *client, void *data);
|
|
int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
|
|
|
|
/*
|
|
* PCM library
|
|
*/
|
|
|
|
static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
|
|
{
|
|
return substream->group != &substream->self_group;
|
|
}
|
|
|
|
static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
|
|
{
|
|
read_lock(&snd_pcm_link_rwlock);
|
|
spin_lock(&substream->self_group.lock);
|
|
}
|
|
|
|
static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
|
|
{
|
|
spin_unlock(&substream->self_group.lock);
|
|
read_unlock(&snd_pcm_link_rwlock);
|
|
}
|
|
|
|
static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
|
|
{
|
|
read_lock_irq(&snd_pcm_link_rwlock);
|
|
spin_lock(&substream->self_group.lock);
|
|
}
|
|
|
|
static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
|
|
{
|
|
spin_unlock(&substream->self_group.lock);
|
|
read_unlock_irq(&snd_pcm_link_rwlock);
|
|
}
|
|
|
|
#define snd_pcm_stream_lock_irqsave(substream, flags) \
|
|
do { \
|
|
read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
|
|
spin_lock(&substream->self_group.lock); \
|
|
} while (0)
|
|
|
|
#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
|
|
do { \
|
|
spin_unlock(&substream->self_group.lock); \
|
|
read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
|
|
} while (0)
|
|
|
|
#define snd_pcm_group_for_each_entry(s, substream) \
|
|
list_for_each_entry(s, &substream->group->substreams, link_list)
|
|
|
|
static inline int snd_pcm_running(struct snd_pcm_substream *substream)
|
|
{
|
|
return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
|
|
(substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
|
|
substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
|
|
}
|
|
|
|
static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
|
|
{
|
|
return size * 8 / runtime->sample_bits;
|
|
}
|
|
|
|
static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
|
|
{
|
|
return size * 8 / runtime->frame_bits;
|
|
}
|
|
|
|
static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
|
|
{
|
|
return size * runtime->sample_bits / 8;
|
|
}
|
|
|
|
static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
|
|
{
|
|
return size * runtime->frame_bits / 8;
|
|
}
|
|
|
|
static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
|
|
{
|
|
return bytes % runtime->byte_align == 0;
|
|
}
|
|
|
|
static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return frames_to_bytes(runtime, runtime->buffer_size);
|
|
}
|
|
|
|
static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return frames_to_bytes(runtime, runtime->period_size);
|
|
}
|
|
|
|
/*
|
|
* result is: 0 ... (boundary - 1)
|
|
*/
|
|
static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
|
|
{
|
|
snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
|
|
if (avail < 0)
|
|
avail += runtime->boundary;
|
|
else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
|
|
avail -= runtime->boundary;
|
|
return avail;
|
|
}
|
|
|
|
/*
|
|
* result is: 0 ... (boundary - 1)
|
|
*/
|
|
static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
|
|
{
|
|
snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
|
|
if (avail < 0)
|
|
avail += runtime->boundary;
|
|
return avail;
|
|
}
|
|
|
|
static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
|
|
{
|
|
return runtime->buffer_size - snd_pcm_playback_avail(runtime);
|
|
}
|
|
|
|
static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
|
|
{
|
|
return runtime->buffer_size - snd_pcm_capture_avail(runtime);
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_playback_ready - check whether the playback buffer is available
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* Checks whether enough free space is available on the playback buffer.
|
|
*
|
|
* Returns non-zero if available, or zero if not.
|
|
*/
|
|
static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_capture_ready - check whether the capture buffer is available
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* Checks whether enough capture data is available on the capture buffer.
|
|
*
|
|
* Returns non-zero if available, or zero if not.
|
|
*/
|
|
static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_playback_data - check whether any data exists on the playback buffer
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* Checks whether any data exists on the playback buffer. If stop_threshold
|
|
* is bigger or equal to boundary, then this function returns always non-zero.
|
|
*
|
|
* Returns non-zero if exists, or zero if not.
|
|
*/
|
|
static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
|
|
if (runtime->stop_threshold >= runtime->boundary)
|
|
return 1;
|
|
return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_playback_empty - check whether the playback buffer is empty
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* Checks whether the playback buffer is empty.
|
|
*
|
|
* Returns non-zero if empty, or zero if not.
|
|
*/
|
|
static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
|
|
}
|
|
|
|
/**
|
|
* snd_pcm_capture_empty - check whether the capture buffer is empty
|
|
* @substream: the pcm substream instance
|
|
*
|
|
* Checks whether the capture buffer is empty.
|
|
*
|
|
* Returns non-zero if empty, or zero if not.
|
|
*/
|
|
static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
return snd_pcm_capture_avail(runtime) == 0;
|
|
}
|
|
|
|
static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_substream *master)
|
|
{
|
|
substream->runtime->trigger_master = master;
|
|
}
|
|
|
|
static inline int hw_is_mask(int var)
|
|
{
|
|
return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
|
|
var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
|
|
}
|
|
|
|
static inline int hw_is_interval(int var)
|
|
{
|
|
return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
|
|
var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
|
|
}
|
|
|
|
static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
|
|
}
|
|
|
|
static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
|
|
}
|
|
|
|
static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
|
|
}
|
|
|
|
static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
|
|
snd_pcm_hw_param_t var)
|
|
{
|
|
return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
|
|
}
|
|
|
|
#define params_access(p) ((__force snd_pcm_access_t)snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)))
|
|
#define params_format(p) ((__force snd_pcm_format_t)snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)))
|
|
#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
|
|
#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
|
|
#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
|
|
#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
|
|
#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
|
|
#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
|
|
#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
|
|
#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
|
|
|
|
|
|
int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
|
|
void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
|
|
void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
|
|
void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b,
|
|
unsigned int k, struct snd_interval *c);
|
|
void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
|
|
const struct snd_interval *b, struct snd_interval *c);
|
|
int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask);
|
|
int snd_interval_ratnum(struct snd_interval *i,
|
|
unsigned int rats_count, struct snd_ratnum *rats,
|
|
unsigned int *nump, unsigned int *denp);
|
|
|
|
void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
|
|
void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
|
|
int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
|
|
|
|
int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
|
|
|
|
int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
|
|
int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
|
|
|
|
int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
|
u_int32_t mask);
|
|
int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
|
u_int64_t mask);
|
|
int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
|
|
unsigned int min, unsigned int max);
|
|
int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
|
|
int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
struct snd_pcm_hw_constraint_list *l);
|
|
int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
struct snd_pcm_hw_constraint_ratnums *r);
|
|
int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
struct snd_pcm_hw_constraint_ratdens *r);
|
|
int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
unsigned int width,
|
|
unsigned int msbits);
|
|
int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var,
|
|
unsigned long step);
|
|
int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
snd_pcm_hw_param_t var);
|
|
int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
|
|
unsigned int cond,
|
|
int var,
|
|
snd_pcm_hw_rule_func_t func, void *private,
|
|
int dep, ...);
|
|
|
|
int snd_pcm_format_signed(snd_pcm_format_t format);
|
|
int snd_pcm_format_unsigned(snd_pcm_format_t format);
|
|
int snd_pcm_format_linear(snd_pcm_format_t format);
|
|
int snd_pcm_format_little_endian(snd_pcm_format_t format);
|
|
int snd_pcm_format_big_endian(snd_pcm_format_t format);
|
|
#if 0 /* just for DocBook */
|
|
/**
|
|
* snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
|
|
* @format: the format to check
|
|
*
|
|
* Returns 1 if the given PCM format is CPU-endian, 0 if
|
|
* opposite, or a negative error code if endian not specified.
|
|
*/
|
|
int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
|
|
#endif /* DocBook */
|
|
#ifdef SNDRV_LITTLE_ENDIAN
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#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
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#else
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#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
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#endif
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int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
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int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
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ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
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const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
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int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
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snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
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void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
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void snd_pcm_set_sync(struct snd_pcm_substream *substream);
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int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
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int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
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unsigned int cmd, void *arg);
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int snd_pcm_update_state(struct snd_pcm_substream *substream,
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struct snd_pcm_runtime *runtime);
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int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
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int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
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int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
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int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
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int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
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void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
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void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
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snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
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const void __user *buf,
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snd_pcm_uframes_t frames);
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snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
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void __user *buf, snd_pcm_uframes_t frames);
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snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
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void __user **bufs, snd_pcm_uframes_t frames);
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snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
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void __user **bufs, snd_pcm_uframes_t frames);
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extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
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int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
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unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
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static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
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struct snd_dma_buffer *bufp)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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if (bufp) {
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runtime->dma_buffer_p = bufp;
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runtime->dma_area = bufp->area;
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runtime->dma_addr = bufp->addr;
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runtime->dma_bytes = bufp->bytes;
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} else {
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runtime->dma_buffer_p = NULL;
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runtime->dma_area = NULL;
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runtime->dma_addr = 0;
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runtime->dma_bytes = 0;
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}
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}
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/*
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* Timer interface
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*/
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void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
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void snd_pcm_timer_init(struct snd_pcm_substream *substream);
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void snd_pcm_timer_done(struct snd_pcm_substream *substream);
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static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
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struct timespec *tv)
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{
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if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
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do_posix_clock_monotonic_gettime(tv);
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else
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getnstimeofday(tv);
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}
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/*
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* Memory
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*/
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int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
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int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
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int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
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int type, struct device *data,
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size_t size, size_t max);
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int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
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int type, void *data,
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size_t size, size_t max);
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int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
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int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
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int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
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size_t size, gfp_t gfp_flags);
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int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
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struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
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unsigned long offset);
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#if 0 /* for kernel-doc */
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/**
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* snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
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* @substream: the substream to allocate the buffer to
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* @size: the requested buffer size, in bytes
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*
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* Allocates the PCM substream buffer using vmalloc(), i.e., the memory is
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* contiguous in kernel virtual space, but not in physical memory. Use this
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* if the buffer is accessed by kernel code but not by device DMA.
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*
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* Returns 1 if the buffer was changed, 0 if not changed, or a negative error
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* code.
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*/
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static int snd_pcm_lib_alloc_vmalloc_buffer
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(struct snd_pcm_substream *substream, size_t size);
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/**
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* snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer
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* @substream: the substream to allocate the buffer to
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* @size: the requested buffer size, in bytes
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*
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* This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
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* vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
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*/
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static int snd_pcm_lib_alloc_vmalloc_32_buffer
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(struct snd_pcm_substream *substream, size_t size);
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#endif
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#define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \
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_snd_pcm_lib_alloc_vmalloc_buffer \
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(subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO)
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#define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \
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_snd_pcm_lib_alloc_vmalloc_buffer \
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(subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO)
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#ifdef CONFIG_SND_DMA_SGBUF
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/*
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* SG-buffer handling
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*/
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#define snd_pcm_substream_sgbuf(substream) \
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((substream)->runtime->dma_buffer_p->private_data)
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static inline dma_addr_t
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snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
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{
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struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
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return snd_sgbuf_get_addr(sg, ofs);
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}
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static inline void *
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snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
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{
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struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
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return snd_sgbuf_get_ptr(sg, ofs);
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}
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struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
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unsigned long offset);
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unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
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unsigned int ofs, unsigned int size);
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#else /* !SND_DMA_SGBUF */
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/*
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* fake using a continuous buffer
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*/
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static inline dma_addr_t
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snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
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{
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return substream->runtime->dma_addr + ofs;
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}
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static inline void *
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snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
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{
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return substream->runtime->dma_area + ofs;
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}
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#define snd_pcm_sgbuf_ops_page NULL
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#define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size)
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#endif /* SND_DMA_SGBUF */
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/* handle mmap counter - PCM mmap callback should handle this counter properly */
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static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
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{
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struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
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atomic_inc(&substream->mmap_count);
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}
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static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
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{
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struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
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atomic_dec(&substream->mmap_count);
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}
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/* mmap for io-memory area */
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#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
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#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
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int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
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#else
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#define SNDRV_PCM_INFO_MMAP_IOMEM 0
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#define snd_pcm_lib_mmap_iomem NULL
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#endif
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#define snd_pcm_lib_mmap_vmalloc NULL
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static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
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{
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*max = dma < 4 ? 64 * 1024 : 128 * 1024;
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}
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|
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/*
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* Misc
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*/
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#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
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(IEC958_AES1_CON_ORIGINAL<<8)|\
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(IEC958_AES1_CON_PCM_CODER<<8)|\
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(IEC958_AES3_CON_FS_48000<<24))
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#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
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const char *snd_pcm_format_name(snd_pcm_format_t format);
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#endif /* __SOUND_PCM_H */
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