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/******************************************************************************
* recordMyDesktop *
*******************************************************************************
* *
* Copyright (C) 2006,2007,2008 John Varouhakis *
* *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software *
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
* *
* *
* *
* For further information contact me at johnvarouhakis@gmail.com *
******************************************************************************/
#include "config.h"
#include "rmd_capture_audio.h"
#include "rmd_jack.h"
#include "rmd_opendev.h"
#include "rmd_threads.h"
#include "rmd_types.h"
#include <pthread.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
void *rmdCaptureAudio(ProgData *pdata)
{
#ifdef HAVE_LIBASOUND
int frames = pdata->periodsize;
#endif
rmdThreadsSetName("rmdCaptureAudio");
//start capturing only after first frame is taken
nanosleep(&(struct timespec){ .tv_nsec = pdata->frametime_us * 1000 }, NULL);
while (pdata->running) {
int sret = 0;
SndBuffer *newbuf, *tmp;
if (pdata->paused) {
#ifdef HAVE_LIBASOUND
if (!pdata->hard_pause) {
snd_pcm_pause(pdata->sound_handle, 1);
pthread_mutex_lock(&pdata->pause_mutex);
pthread_cond_wait(&pdata->pause_cond, &pdata->pause_mutex);
pthread_mutex_unlock(&pdata->pause_mutex);
snd_pcm_pause(pdata->sound_handle, 0);
} else {//device doesn't support pause(is this the norm?mine doesn't)
snd_pcm_close(pdata->sound_handle);
pthread_mutex_lock(&pdata->pause_mutex);
pthread_cond_wait(&pdata->pause_cond, &pdata->pause_mutex);
pthread_mutex_unlock(&pdata->pause_mutex);
pdata->sound_handle =
rmdOpenDev(pdata->args.device,
&pdata->args.channels,
&pdata->args.frequency,
&pdata->args.buffsize,
NULL,
NULL,
NULL//let's hope that the device capabilities
//didn't magically change
);
if (pdata->sound_handle == NULL) {
fprintf(stderr, "Couldn't reopen audio device. Exiting\n");
pdata->running = FALSE;
errno = 3;
pthread_exit(&errno);
}
}
#else
close(pdata->sound_handle);
pthread_mutex_lock(&pdata->pause_mutex);
pthread_cond_wait(&pdata->pause_cond, &pdata->pause_mutex);
pthread_mutex_unlock(&pdata->pause_mutex);
pdata->sound_handle = rmdOpenDev( pdata->args.device,
pdata->args.channels,
pdata->args.frequency);
if (pdata->sound_handle < 0) {
fprintf(stderr, "Couldn't reopen audio device. Exiting\n");
pdata->running = FALSE;
errno = 3;
pthread_exit(&errno);
}
#endif
}
//create new buffer
newbuf = (SndBuffer *)malloc(sizeof(SndBuffer));
#ifdef HAVE_LIBASOUND
newbuf->data = (signed char *)malloc(frames * pdata->sound_framesize);
#else
newbuf->data = (signed char *)malloc((pdata->args.buffsize << 1) * pdata->args.channels);
#endif
newbuf->next = NULL;
//read data into new buffer
#ifdef HAVE_LIBASOUND
while (sret < frames) {
int temp_sret = snd_pcm_readi( pdata->sound_handle,
newbuf->data + pdata->sound_framesize * sret,
frames-sret);
if (temp_sret == -EPIPE) {
fprintf(stderr, "%s: Overrun occurred.\n",
snd_strerror(temp_sret));
snd_pcm_prepare(pdata->sound_handle);
} else if (temp_sret < 0) {
fprintf(stderr, "An error occured while reading audio data:\n"
" %s\n",
snd_strerror(temp_sret));
snd_pcm_prepare(pdata->sound_handle);
} else
sret += temp_sret;
}
#else
sret = 0;
//oss recording loop
do {
int temp_sret = read( pdata->sound_handle,
&newbuf->data[sret],
(pdata->args.buffsize << 1) *
pdata->args.channels)-sret;
if (temp_sret < 0) {
fprintf(stderr, "An error occured while reading from soundcard"
"%s\nError description:\n%s\n",
pdata->args.device, strerror(errno));
} else
sret += temp_sret;
} while (sret < (pdata->args.buffsize << 1) * pdata->args.channels);
#endif
/* Since sound buffers are queued here by allocating buffers, their "stream time"
* can be accounted for here instead of after encoding, since encoding isn't lossy
* in the time domain there shouldn't be any disparity. Infact, buffer underruns
* should get accounted for too FIXME TODO
*/
pthread_mutex_lock(&pdata->avd_mutex);
pdata->avd -= pdata->periodtime_us;
pthread_mutex_unlock(&pdata->avd_mutex);
//queue the new buffer
pthread_mutex_lock(&pdata->sound_buffer_mutex);
tmp = pdata->sound_buffer;
if (!tmp)
pdata->sound_buffer = newbuf;
else {
while (tmp->next != NULL)
tmp = tmp->next;
tmp->next = newbuf;
}
pthread_cond_signal(&pdata->sound_data_read);
pthread_mutex_unlock(&pdata->sound_buffer_mutex);
}
#ifdef HAVE_LIBASOUND
snd_pcm_close(pdata->sound_handle);
#else
close(pdata->sound_handle);
#endif
pthread_exit(&errno);
}
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