619 строки
15 KiB
C
619 строки
15 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* u_audio.c -- interface to USB gadget "ALSA sound card" utilities
|
|
*
|
|
* Copyright (C) 2016
|
|
* Author: Ruslan Bilovol <ruslan.bilovol@gmail.com>
|
|
*
|
|
* Sound card implementation was cut-and-pasted with changes
|
|
* from f_uac2.c and has:
|
|
* Copyright (C) 2011
|
|
* Yadwinder Singh (yadi.brar01@gmail.com)
|
|
* Jaswinder Singh (jaswinder.singh@linaro.org)
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
|
|
#include "u_audio.h"
|
|
|
|
#define BUFF_SIZE_MAX (PAGE_SIZE * 16)
|
|
#define PRD_SIZE_MAX PAGE_SIZE
|
|
#define MIN_PERIODS 4
|
|
|
|
struct uac_req {
|
|
struct uac_rtd_params *pp; /* parent param */
|
|
struct usb_request *req;
|
|
};
|
|
|
|
/* Runtime data params for one stream */
|
|
struct uac_rtd_params {
|
|
struct snd_uac_chip *uac; /* parent chip */
|
|
bool ep_enabled; /* if the ep is enabled */
|
|
|
|
struct snd_pcm_substream *ss;
|
|
|
|
/* Ring buffer */
|
|
ssize_t hw_ptr;
|
|
|
|
void *rbuf;
|
|
|
|
unsigned int max_psize; /* MaxPacketSize of endpoint */
|
|
struct uac_req *ureq;
|
|
|
|
spinlock_t lock;
|
|
};
|
|
|
|
struct snd_uac_chip {
|
|
struct g_audio *audio_dev;
|
|
|
|
struct uac_rtd_params p_prm;
|
|
struct uac_rtd_params c_prm;
|
|
|
|
struct snd_card *card;
|
|
struct snd_pcm *pcm;
|
|
|
|
/* timekeeping for the playback endpoint */
|
|
unsigned int p_interval;
|
|
unsigned int p_residue;
|
|
|
|
/* pre-calculated values for playback iso completion */
|
|
unsigned int p_pktsize;
|
|
unsigned int p_pktsize_residue;
|
|
unsigned int p_framesize;
|
|
};
|
|
|
|
static const struct snd_pcm_hardware uac_pcm_hardware = {
|
|
.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER
|
|
| SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID
|
|
| SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
|
|
.rates = SNDRV_PCM_RATE_CONTINUOUS,
|
|
.periods_max = BUFF_SIZE_MAX / PRD_SIZE_MAX,
|
|
.buffer_bytes_max = BUFF_SIZE_MAX,
|
|
.period_bytes_max = PRD_SIZE_MAX,
|
|
.periods_min = MIN_PERIODS,
|
|
};
|
|
|
|
static void u_audio_iso_complete(struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
unsigned int pending;
|
|
unsigned long flags, flags2;
|
|
unsigned int hw_ptr;
|
|
int status = req->status;
|
|
struct uac_req *ur = req->context;
|
|
struct snd_pcm_substream *substream;
|
|
struct snd_pcm_runtime *runtime;
|
|
struct uac_rtd_params *prm = ur->pp;
|
|
struct snd_uac_chip *uac = prm->uac;
|
|
|
|
/* i/f shutting down */
|
|
if (!prm->ep_enabled || req->status == -ESHUTDOWN)
|
|
return;
|
|
|
|
/*
|
|
* We can't really do much about bad xfers.
|
|
* Afterall, the ISOCH xfers could fail legitimately.
|
|
*/
|
|
if (status)
|
|
pr_debug("%s: iso_complete status(%d) %d/%d\n",
|
|
__func__, status, req->actual, req->length);
|
|
|
|
substream = prm->ss;
|
|
|
|
/* Do nothing if ALSA isn't active */
|
|
if (!substream)
|
|
goto exit;
|
|
|
|
snd_pcm_stream_lock_irqsave(substream, flags2);
|
|
|
|
runtime = substream->runtime;
|
|
if (!runtime || !snd_pcm_running(substream)) {
|
|
snd_pcm_stream_unlock_irqrestore(substream, flags2);
|
|
goto exit;
|
|
}
|
|
|
|
spin_lock_irqsave(&prm->lock, flags);
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
/*
|
|
* For each IN packet, take the quotient of the current data
|
|
* rate and the endpoint's interval as the base packet size.
|
|
* If there is a residue from this division, add it to the
|
|
* residue accumulator.
|
|
*/
|
|
req->length = uac->p_pktsize;
|
|
uac->p_residue += uac->p_pktsize_residue;
|
|
|
|
/*
|
|
* Whenever there are more bytes in the accumulator than we
|
|
* need to add one more sample frame, increase this packet's
|
|
* size and decrease the accumulator.
|
|
*/
|
|
if (uac->p_residue / uac->p_interval >= uac->p_framesize) {
|
|
req->length += uac->p_framesize;
|
|
uac->p_residue -= uac->p_framesize *
|
|
uac->p_interval;
|
|
}
|
|
|
|
req->actual = req->length;
|
|
}
|
|
|
|
hw_ptr = prm->hw_ptr;
|
|
|
|
spin_unlock_irqrestore(&prm->lock, flags);
|
|
|
|
/* Pack USB load in ALSA ring buffer */
|
|
pending = runtime->dma_bytes - hw_ptr;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
if (unlikely(pending < req->actual)) {
|
|
memcpy(req->buf, runtime->dma_area + hw_ptr, pending);
|
|
memcpy(req->buf + pending, runtime->dma_area,
|
|
req->actual - pending);
|
|
} else {
|
|
memcpy(req->buf, runtime->dma_area + hw_ptr,
|
|
req->actual);
|
|
}
|
|
} else {
|
|
if (unlikely(pending < req->actual)) {
|
|
memcpy(runtime->dma_area + hw_ptr, req->buf, pending);
|
|
memcpy(runtime->dma_area, req->buf + pending,
|
|
req->actual - pending);
|
|
} else {
|
|
memcpy(runtime->dma_area + hw_ptr, req->buf,
|
|
req->actual);
|
|
}
|
|
}
|
|
|
|
spin_lock_irqsave(&prm->lock, flags);
|
|
/* update hw_ptr after data is copied to memory */
|
|
prm->hw_ptr = (hw_ptr + req->actual) % runtime->dma_bytes;
|
|
hw_ptr = prm->hw_ptr;
|
|
spin_unlock_irqrestore(&prm->lock, flags);
|
|
snd_pcm_stream_unlock_irqrestore(substream, flags2);
|
|
|
|
if ((hw_ptr % snd_pcm_lib_period_bytes(substream)) < req->actual)
|
|
snd_pcm_period_elapsed(substream);
|
|
|
|
exit:
|
|
if (usb_ep_queue(ep, req, GFP_ATOMIC))
|
|
dev_err(uac->card->dev, "%d Error!\n", __LINE__);
|
|
}
|
|
|
|
static int uac_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_uac_chip *uac = snd_pcm_substream_chip(substream);
|
|
struct uac_rtd_params *prm;
|
|
struct g_audio *audio_dev;
|
|
struct uac_params *params;
|
|
unsigned long flags;
|
|
int err = 0;
|
|
|
|
audio_dev = uac->audio_dev;
|
|
params = &audio_dev->params;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
prm = &uac->p_prm;
|
|
else
|
|
prm = &uac->c_prm;
|
|
|
|
spin_lock_irqsave(&prm->lock, flags);
|
|
|
|
/* Reset */
|
|
prm->hw_ptr = 0;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
prm->ss = substream;
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
prm->ss = NULL;
|
|
break;
|
|
default:
|
|
err = -EINVAL;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&prm->lock, flags);
|
|
|
|
/* Clear buffer after Play stops */
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && !prm->ss)
|
|
memset(prm->rbuf, 0, prm->max_psize * params->req_number);
|
|
|
|
return err;
|
|
}
|
|
|
|
static snd_pcm_uframes_t uac_pcm_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_uac_chip *uac = snd_pcm_substream_chip(substream);
|
|
struct uac_rtd_params *prm;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
prm = &uac->p_prm;
|
|
else
|
|
prm = &uac->c_prm;
|
|
|
|
return bytes_to_frames(substream->runtime, prm->hw_ptr);
|
|
}
|
|
|
|
static int uac_pcm_open(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_uac_chip *uac = snd_pcm_substream_chip(substream);
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct g_audio *audio_dev;
|
|
struct uac_params *params;
|
|
int p_ssize, c_ssize;
|
|
int p_srate, c_srate;
|
|
int p_chmask, c_chmask;
|
|
|
|
audio_dev = uac->audio_dev;
|
|
params = &audio_dev->params;
|
|
p_ssize = params->p_ssize;
|
|
c_ssize = params->c_ssize;
|
|
p_srate = params->p_srate;
|
|
c_srate = params->c_srate;
|
|
p_chmask = params->p_chmask;
|
|
c_chmask = params->c_chmask;
|
|
uac->p_residue = 0;
|
|
|
|
runtime->hw = uac_pcm_hardware;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
spin_lock_init(&uac->p_prm.lock);
|
|
runtime->hw.rate_min = p_srate;
|
|
switch (p_ssize) {
|
|
case 3:
|
|
runtime->hw.formats = SNDRV_PCM_FMTBIT_S24_3LE;
|
|
break;
|
|
case 4:
|
|
runtime->hw.formats = SNDRV_PCM_FMTBIT_S32_LE;
|
|
break;
|
|
default:
|
|
runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
|
|
break;
|
|
}
|
|
runtime->hw.channels_min = num_channels(p_chmask);
|
|
runtime->hw.period_bytes_min = 2 * uac->p_prm.max_psize
|
|
/ runtime->hw.periods_min;
|
|
} else {
|
|
spin_lock_init(&uac->c_prm.lock);
|
|
runtime->hw.rate_min = c_srate;
|
|
switch (c_ssize) {
|
|
case 3:
|
|
runtime->hw.formats = SNDRV_PCM_FMTBIT_S24_3LE;
|
|
break;
|
|
case 4:
|
|
runtime->hw.formats = SNDRV_PCM_FMTBIT_S32_LE;
|
|
break;
|
|
default:
|
|
runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
|
|
break;
|
|
}
|
|
runtime->hw.channels_min = num_channels(c_chmask);
|
|
runtime->hw.period_bytes_min = 2 * uac->c_prm.max_psize
|
|
/ runtime->hw.periods_min;
|
|
}
|
|
|
|
runtime->hw.rate_max = runtime->hw.rate_min;
|
|
runtime->hw.channels_max = runtime->hw.channels_min;
|
|
|
|
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ALSA cries without these function pointers */
|
|
static int uac_pcm_null(struct snd_pcm_substream *substream)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_pcm_ops uac_pcm_ops = {
|
|
.open = uac_pcm_open,
|
|
.close = uac_pcm_null,
|
|
.trigger = uac_pcm_trigger,
|
|
.pointer = uac_pcm_pointer,
|
|
.prepare = uac_pcm_null,
|
|
};
|
|
|
|
static inline void free_ep(struct uac_rtd_params *prm, struct usb_ep *ep)
|
|
{
|
|
struct snd_uac_chip *uac = prm->uac;
|
|
struct g_audio *audio_dev;
|
|
struct uac_params *params;
|
|
int i;
|
|
|
|
if (!prm->ep_enabled)
|
|
return;
|
|
|
|
prm->ep_enabled = false;
|
|
|
|
audio_dev = uac->audio_dev;
|
|
params = &audio_dev->params;
|
|
|
|
for (i = 0; i < params->req_number; i++) {
|
|
if (prm->ureq[i].req) {
|
|
usb_ep_dequeue(ep, prm->ureq[i].req);
|
|
usb_ep_free_request(ep, prm->ureq[i].req);
|
|
prm->ureq[i].req = NULL;
|
|
}
|
|
}
|
|
|
|
if (usb_ep_disable(ep))
|
|
dev_err(uac->card->dev, "%s:%d Error!\n", __func__, __LINE__);
|
|
}
|
|
|
|
|
|
int u_audio_start_capture(struct g_audio *audio_dev)
|
|
{
|
|
struct snd_uac_chip *uac = audio_dev->uac;
|
|
struct usb_gadget *gadget = audio_dev->gadget;
|
|
struct device *dev = &gadget->dev;
|
|
struct usb_request *req;
|
|
struct usb_ep *ep;
|
|
struct uac_rtd_params *prm;
|
|
struct uac_params *params = &audio_dev->params;
|
|
int req_len, i;
|
|
|
|
ep = audio_dev->out_ep;
|
|
prm = &uac->c_prm;
|
|
config_ep_by_speed(gadget, &audio_dev->func, ep);
|
|
req_len = ep->maxpacket;
|
|
|
|
prm->ep_enabled = true;
|
|
usb_ep_enable(ep);
|
|
|
|
for (i = 0; i < params->req_number; i++) {
|
|
if (!prm->ureq[i].req) {
|
|
req = usb_ep_alloc_request(ep, GFP_ATOMIC);
|
|
if (req == NULL)
|
|
return -ENOMEM;
|
|
|
|
prm->ureq[i].req = req;
|
|
prm->ureq[i].pp = prm;
|
|
|
|
req->zero = 0;
|
|
req->context = &prm->ureq[i];
|
|
req->length = req_len;
|
|
req->complete = u_audio_iso_complete;
|
|
req->buf = prm->rbuf + i * ep->maxpacket;
|
|
}
|
|
|
|
if (usb_ep_queue(ep, prm->ureq[i].req, GFP_ATOMIC))
|
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(u_audio_start_capture);
|
|
|
|
void u_audio_stop_capture(struct g_audio *audio_dev)
|
|
{
|
|
struct snd_uac_chip *uac = audio_dev->uac;
|
|
|
|
free_ep(&uac->c_prm, audio_dev->out_ep);
|
|
}
|
|
EXPORT_SYMBOL_GPL(u_audio_stop_capture);
|
|
|
|
int u_audio_start_playback(struct g_audio *audio_dev)
|
|
{
|
|
struct snd_uac_chip *uac = audio_dev->uac;
|
|
struct usb_gadget *gadget = audio_dev->gadget;
|
|
struct device *dev = &gadget->dev;
|
|
struct usb_request *req;
|
|
struct usb_ep *ep;
|
|
struct uac_rtd_params *prm;
|
|
struct uac_params *params = &audio_dev->params;
|
|
unsigned int factor;
|
|
const struct usb_endpoint_descriptor *ep_desc;
|
|
int req_len, i;
|
|
|
|
ep = audio_dev->in_ep;
|
|
prm = &uac->p_prm;
|
|
config_ep_by_speed(gadget, &audio_dev->func, ep);
|
|
|
|
ep_desc = ep->desc;
|
|
|
|
/* pre-calculate the playback endpoint's interval */
|
|
if (gadget->speed == USB_SPEED_FULL)
|
|
factor = 1000;
|
|
else
|
|
factor = 8000;
|
|
|
|
/* pre-compute some values for iso_complete() */
|
|
uac->p_framesize = params->p_ssize *
|
|
num_channels(params->p_chmask);
|
|
uac->p_interval = factor / (1 << (ep_desc->bInterval - 1));
|
|
uac->p_pktsize = min_t(unsigned int,
|
|
uac->p_framesize *
|
|
(params->p_srate / uac->p_interval),
|
|
ep->maxpacket);
|
|
|
|
if (uac->p_pktsize < ep->maxpacket)
|
|
uac->p_pktsize_residue = uac->p_framesize *
|
|
(params->p_srate % uac->p_interval);
|
|
else
|
|
uac->p_pktsize_residue = 0;
|
|
|
|
req_len = uac->p_pktsize;
|
|
uac->p_residue = 0;
|
|
|
|
prm->ep_enabled = true;
|
|
usb_ep_enable(ep);
|
|
|
|
for (i = 0; i < params->req_number; i++) {
|
|
if (!prm->ureq[i].req) {
|
|
req = usb_ep_alloc_request(ep, GFP_ATOMIC);
|
|
if (req == NULL)
|
|
return -ENOMEM;
|
|
|
|
prm->ureq[i].req = req;
|
|
prm->ureq[i].pp = prm;
|
|
|
|
req->zero = 0;
|
|
req->context = &prm->ureq[i];
|
|
req->length = req_len;
|
|
req->complete = u_audio_iso_complete;
|
|
req->buf = prm->rbuf + i * ep->maxpacket;
|
|
}
|
|
|
|
if (usb_ep_queue(ep, prm->ureq[i].req, GFP_ATOMIC))
|
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(u_audio_start_playback);
|
|
|
|
void u_audio_stop_playback(struct g_audio *audio_dev)
|
|
{
|
|
struct snd_uac_chip *uac = audio_dev->uac;
|
|
|
|
free_ep(&uac->p_prm, audio_dev->in_ep);
|
|
}
|
|
EXPORT_SYMBOL_GPL(u_audio_stop_playback);
|
|
|
|
int g_audio_setup(struct g_audio *g_audio, const char *pcm_name,
|
|
const char *card_name)
|
|
{
|
|
struct snd_uac_chip *uac;
|
|
struct snd_card *card;
|
|
struct snd_pcm *pcm;
|
|
struct uac_params *params;
|
|
int p_chmask, c_chmask;
|
|
int err;
|
|
|
|
if (!g_audio)
|
|
return -EINVAL;
|
|
|
|
uac = kzalloc(sizeof(*uac), GFP_KERNEL);
|
|
if (!uac)
|
|
return -ENOMEM;
|
|
g_audio->uac = uac;
|
|
uac->audio_dev = g_audio;
|
|
|
|
params = &g_audio->params;
|
|
p_chmask = params->p_chmask;
|
|
c_chmask = params->c_chmask;
|
|
|
|
if (c_chmask) {
|
|
struct uac_rtd_params *prm = &uac->c_prm;
|
|
|
|
uac->c_prm.uac = uac;
|
|
prm->max_psize = g_audio->out_ep_maxpsize;
|
|
|
|
prm->ureq = kcalloc(params->req_number, sizeof(struct uac_req),
|
|
GFP_KERNEL);
|
|
if (!prm->ureq) {
|
|
err = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
prm->rbuf = kcalloc(params->req_number, prm->max_psize,
|
|
GFP_KERNEL);
|
|
if (!prm->rbuf) {
|
|
prm->max_psize = 0;
|
|
err = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (p_chmask) {
|
|
struct uac_rtd_params *prm = &uac->p_prm;
|
|
|
|
uac->p_prm.uac = uac;
|
|
prm->max_psize = g_audio->in_ep_maxpsize;
|
|
|
|
prm->ureq = kcalloc(params->req_number, sizeof(struct uac_req),
|
|
GFP_KERNEL);
|
|
if (!prm->ureq) {
|
|
err = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
prm->rbuf = kcalloc(params->req_number, prm->max_psize,
|
|
GFP_KERNEL);
|
|
if (!prm->rbuf) {
|
|
prm->max_psize = 0;
|
|
err = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* Choose any slot, with no id */
|
|
err = snd_card_new(&g_audio->gadget->dev,
|
|
-1, NULL, THIS_MODULE, 0, &card);
|
|
if (err < 0)
|
|
goto fail;
|
|
|
|
uac->card = card;
|
|
|
|
/*
|
|
* Create first PCM device
|
|
* Create a substream only for non-zero channel streams
|
|
*/
|
|
err = snd_pcm_new(uac->card, pcm_name, 0,
|
|
p_chmask ? 1 : 0, c_chmask ? 1 : 0, &pcm);
|
|
if (err < 0)
|
|
goto snd_fail;
|
|
|
|
strlcpy(pcm->name, pcm_name, sizeof(pcm->name));
|
|
pcm->private_data = uac;
|
|
uac->pcm = pcm;
|
|
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &uac_pcm_ops);
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &uac_pcm_ops);
|
|
|
|
strlcpy(card->driver, card_name, sizeof(card->driver));
|
|
strlcpy(card->shortname, card_name, sizeof(card->shortname));
|
|
sprintf(card->longname, "%s %i", card_name, card->dev->id);
|
|
|
|
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
|
|
NULL, 0, BUFF_SIZE_MAX);
|
|
|
|
err = snd_card_register(card);
|
|
|
|
if (!err)
|
|
return 0;
|
|
|
|
snd_fail:
|
|
snd_card_free(card);
|
|
fail:
|
|
kfree(uac->p_prm.ureq);
|
|
kfree(uac->c_prm.ureq);
|
|
kfree(uac->p_prm.rbuf);
|
|
kfree(uac->c_prm.rbuf);
|
|
kfree(uac);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(g_audio_setup);
|
|
|
|
void g_audio_cleanup(struct g_audio *g_audio)
|
|
{
|
|
struct snd_uac_chip *uac;
|
|
struct snd_card *card;
|
|
|
|
if (!g_audio || !g_audio->uac)
|
|
return;
|
|
|
|
uac = g_audio->uac;
|
|
card = uac->card;
|
|
if (card)
|
|
snd_card_free(card);
|
|
|
|
kfree(uac->p_prm.ureq);
|
|
kfree(uac->c_prm.ureq);
|
|
kfree(uac->p_prm.rbuf);
|
|
kfree(uac->c_prm.rbuf);
|
|
kfree(uac);
|
|
}
|
|
EXPORT_SYMBOL_GPL(g_audio_cleanup);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("USB gadget \"ALSA sound card\" utilities");
|
|
MODULE_AUTHOR("Ruslan Bilovol");
|