/**
* Record
*/
void *record_alsa(struct bat *bat)
{
int err = 0;
FILE *fp = NULL;
struct pcm_container sndpcm;
struct wav_container wav;
int count;
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
fprintf(bat->log, _("Entering capture thread (ALSA).\n"));
retval_record = 0;
memset(&sndpcm, 0, sizeof(sndpcm));
if (bat->capture.device == NULL) {
fprintf(bat->err, _("No PCM device for capture: exit\n"));
retval_record = 1;
goto exit1;
}
err = snd_pcm_open(&sndpcm.handle, bat->capture.device,
SND_PCM_STREAM_CAPTURE, 0);
if (err != 0) {
fprintf(bat->err, _("Cannot open PCM capture device: "));
fprintf(bat->err, _("%s(%d)\n"), snd_strerror(err), err);
retval_record = 1;
goto exit1;
}
err = set_snd_pcm_params(bat, &sndpcm);
if (err != 0) {
retval_record = 1;
goto exit2;
}
remove(bat->capture.file);
fp = fopen(bat->capture.file, "w+");
if (fp == NULL) {
fprintf(bat->err, _("Cannot open file for capture: %s %d\n"),
bat->capture.file, -errno);
retval_record = 1;
goto exit3;
}
prepare_wav_info(&wav, bat);
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL);
pthread_cleanup_push(snd_pcm_close, sndpcm.handle);
pthread_cleanup_push(free, sndpcm.buffer);
pthread_cleanup_push(fclose, fp);
err = write_wav_header(fp, &wav, bat);
if (err != 0) {
retval_record = 1;
goto exit4;
}
count = wav.chunk.length;
fprintf(bat->log, _("Recording ...\n"));
err = read_from_pcm_loop(fp, count, &sndpcm, bat);
if (err != 0) {
retval_record = 1;
goto exit4;
}
/* Normally we will never reach this part of code (before fail_exit) as
this thread will be cancelled by end of play thread. */
pthread_cleanup_pop(0);
pthread_cleanup_pop(0);
pthread_cleanup_pop(0);
snd_pcm_drain(sndpcm.handle);
exit4:
fclose(fp);
exit3:
free(sndpcm.buffer);
exit2:
snd_pcm_close(sndpcm.handle);
exit1:
pthread_exit(&retval_record);
}
/**
* Record
*/
void *record_alsa(struct bat *bat)
{
int err = 0;
FILE *fp = NULL;
struct snd_pcm_container sndpcm;
struct wav_container wav;
int size, offset, count, frames;
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
printf("Entering capture thread (ALSA).\n");
memset(&sndpcm, 0, sizeof(sndpcm));
if (NULL != bat->capture.device) {
err = snd_pcm_open(&sndpcm.handle, bat->capture.device,
SND_PCM_STREAM_CAPTURE, 0);
if (err < 0) {
loge(E_OPENPCMC, "%s(%d)", snd_strerror(err), err);
goto fail_exit;
}
} else {
loge(E_OPENPCMC, "exit");
goto fail_exit;
}
err = set_snd_pcm_params(bat, &sndpcm);
if (err != 0)
goto fail_exit;
prepare_wav_info(&wav, bat);
remove(bat->capture.file);
fp = fopen(bat->capture.file, "w+");
if (NULL == fp) {
loge(E_OPENFILEC, "%s", bat->capture.file);
goto fail_exit;
}
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL);
pthread_cleanup_push(close_handle, sndpcm.handle);
pthread_cleanup_push(destroy_mem, sndpcm.buffer);
pthread_cleanup_push((void *)close_file, fp);
if (fwrite(&wav.header, 1,
sizeof(wav.header), fp)
!= sizeof(wav.header)) {
loge(E_WRITEFILE, "header %s(%d)", snd_strerror(err), err);
goto fail_exit;
}
if (fwrite(&wav.format, 1,
sizeof(wav.format), fp)
!= sizeof(wav.format)) {
loge(E_WRITEFILE, "format %s(%d)", snd_strerror(err), err);
goto fail_exit;
}
if (fwrite(&wav.chunk, 1,
sizeof(wav.chunk), fp)
!= sizeof(wav.chunk)) {
loge(E_WRITEFILE, "chunk %s(%d)", snd_strerror(err), err);
goto fail_exit;
}
count = wav.chunk.length;
printf("Recording ...\n");
while (count > 0) {
size = (count <= sndpcm.period_bytes) ?
count : sndpcm.period_bytes;
frames = size * 8
/ sndpcm.frame_bits;
offset = 0;
while (frames > 0) {
err = snd_pcm_readi(sndpcm.handle,
sndpcm.buffer + offset, frames);
if (err == -EAGAIN || (err >= 0 && err < frames)) {
snd_pcm_wait(sndpcm.handle, 500);
} else if (err == -EPIPE) {
snd_pcm_prepare(sndpcm.handle);
loge(E_READPCM S_OVERRUN, "%s(%d)",
snd_strerror(err), err);
} else if (err < 0) {
loge(E_READPCM, "%s(%d)",
snd_strerror(err), err);
goto fail_exit;
}
if (err > 0) {
frames -= err;
offset += err * sndpcm.frame_bits / 8;
}
}
if (fwrite(sndpcm.buffer, 1, size, fp) != size) {
loge(E_WRITEFILE, "%s(%d)", snd_strerror(err), err);
goto fail_exit;
}
count -= size;
bat->periods_played++;
if (bat->period_limit
&& bat->periods_played >= bat->periods_total)
break;
}
/* Normally we will never reach this part of code (before fail_exit) as
this thread will be cancelled by end of play thread. */
pthread_cleanup_pop(0);
pthread_cleanup_pop(0);
pthread_cleanup_pop(0);
snd_pcm_drain(sndpcm.handle);
fclose(fp);
free(sndpcm.buffer);
snd_pcm_close(sndpcm.handle);
retval_record = 0;
pthread_exit(&retval_record);
fail_exit:
if (fp)
fclose(fp);
if (sndpcm.buffer)
free(sndpcm.buffer);
if (sndpcm.handle)
snd_pcm_close(sndpcm.handle);
retval_record = 1;
pthread_exit(&retval_record);
}
static int write_to_pcm_loop(struct pcm_container *sndpcm, struct bat *bat)
{
int err;
int bytes = sndpcm->period_bytes; /* playback buffer size */
int frames = bytes * 8 / sndpcm->frame_bits; /* frame count */
FILE *fp = NULL;
struct wav_container wav;
int bytes_total = 0;
if (bat->debugplay) {
fp = fopen(bat->debugplay, "wb");
if (fp == NULL) {
fprintf(bat->err, _("Cannot open file for capture: "));
fprintf(bat->err, _("%s %d\n"), bat->debugplay, -errno);
return -errno;
}
/* leave space for wav header */
err = fseek(fp, sizeof(wav), SEEK_SET);
if (err != 0) {
fprintf(bat->err, _("Seek file error: %d %d\n"),
err, -errno);
return -errno;
}
}
while (1) {
err = generate_input_data(sndpcm, bytes, bat);
if (err < 0)
return err;
else if (err > 0)
break;
if (bat->debugplay) {
err = fwrite(sndpcm->buffer, 1, bytes, fp);
if (err != bytes) {
fprintf(bat->err, _("Write file error: "));
fprintf(bat->err, _("%s(%d)\n"),
snd_strerror(err), err);
return -EIO;
}
bytes_total += bytes;
}
bat->periods_played++;
if (bat->period_is_limited
&& bat->periods_played >= bat->periods_total)
break;
err = write_to_pcm(sndpcm, frames, bat);
if (err != 0)
return err;
}
if (bat->debugplay) {
/* update wav header */
prepare_wav_info(&wav, bat);
wav.chunk.length = bytes_total;
wav.header.length = (wav.chunk.length) + sizeof(wav.chunk)
+ sizeof(wav.format) + sizeof(wav.header) - 8;
rewind(fp);
err = write_wav_header(fp, &wav, bat);
if (err != 0) {
fprintf(bat->err, _("Write file error: %s %s(%d)\n"),
bat->debugplay, snd_strerror(err), err);
return err;
}
fclose(fp);
}
snd_pcm_drain(sndpcm->handle);
return 0;
}
