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Diffstat (limited to 'src/libsound/sound_alsa.c')
-rw-r--r--src/libsound/sound_alsa.c124
1 files changed, 74 insertions, 50 deletions
diff --git a/src/libsound/sound_alsa.c b/src/libsound/sound_alsa.c
index 21199c9..6cb0cc2 100644
--- a/src/libsound/sound_alsa.c
+++ b/src/libsound/sound_alsa.c
@@ -28,6 +28,9 @@
typedef struct sound {
snd_pcm_t *phandle, *chandle;
int pchannels, cchannels;
+ int channels; /* required number of channels */
+ int samplerate; /* required sample rate */
+ char *audiodev; /* required device */
double spl_deviation; /* how much deviation is one sample step */
double paging_phaseshift; /* phase to shift every sample */
double paging_phase; /* current phase */
@@ -112,9 +115,48 @@ error:
return rc;
}
-static int sound_prepare(sound_t *sound)
+static int dev_open(sound_t *sound)
{
- int rc;
+ int rc, rc_rec, rc_play;
+
+ rc_play = snd_pcm_open(&sound->phandle, sound->audiodev, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
+ rc_rec = snd_pcm_open(&sound->chandle, sound->audiodev, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
+ if (rc_play < 0 && rc_rec < 0) {
+ PDEBUG(DSOUND, DEBUG_ERROR, "Failed to open '%s'! (%s)\n", sound->audiodev, snd_strerror(rc_play));
+ PDEBUG(DSOUND, DEBUG_ERROR, "Run 'aplay -l' to get a list of available cards and devices.\n");
+ PDEBUG(DSOUND, DEBUG_ERROR, "Then use 'hw:<card>:<device>' for audio device.\n");
+ return rc_play;
+ }
+ if (rc_play < 0) {
+ PDEBUG(DSOUND, DEBUG_ERROR, "Failed to open '%s' for playback! (%s) Please select a device that supports both direction audio.\n", sound->audiodev, snd_strerror(rc_play));
+ return rc_play;
+ }
+ if (rc_rec < 0) {
+ PDEBUG(DSOUND, DEBUG_ERROR, "Failed to open '%s' for capture! (%s) Please select a device that supports both direction audio.\n", sound->audiodev, snd_strerror(rc_rec));
+ return rc_rec;
+ }
+
+ rc = set_hw_params(sound->phandle, sound->samplerate, &sound->pchannels);
+ if (rc < 0) {
+ PDEBUG(DSOUND, DEBUG_ERROR, "Failed to set playback hw params\n");
+ return rc;
+ }
+ if (sound->pchannels < sound->channels) {
+ PDEBUG(DSOUND, DEBUG_ERROR, "Sound card only supports %d channel for playback.\n", sound->pchannels);
+ return rc;
+ }
+ PDEBUG(DSOUND, DEBUG_DEBUG, "Playback with %d channels.\n", sound->pchannels);
+
+ rc = set_hw_params(sound->chandle, sound->samplerate, &sound->cchannels);
+ if (rc < 0) {
+ PDEBUG(DSOUND, DEBUG_ERROR, "Failed to set capture hw params\n");
+ return rc;
+ }
+ if (sound->cchannels < sound->channels) {
+ PDEBUG(DSOUND, DEBUG_ERROR, "Sound card only supports %d channel for capture.\n", sound->cchannels);
+ return -EIO;
+ }
+ PDEBUG(DSOUND, DEBUG_DEBUG, "Capture with %d channels.\n", sound->cchannels);
rc = snd_pcm_prepare(sound->phandle);
if (rc < 0) {
@@ -131,10 +173,18 @@ static int sound_prepare(sound_t *sound)
return 0;
}
+static void dev_close(sound_t *sound)
+{
+ if (sound->phandle != NULL)
+ snd_pcm_close(sound->phandle);
+ if (sound->chandle != NULL)
+ snd_pcm_close(sound->chandle);
+}
+
void *sound_open(const char *audiodev, double __attribute__((unused)) *tx_frequency, double __attribute__((unused)) *rx_frequency, int __attribute__((unused)) *am, int channels, double __attribute__((unused)) paging_frequency, int samplerate, int __attribute((unused)) latspl, double max_deviation, double __attribute__((unused)) max_modulation, double __attribute__((unused)) modulation_index)
{
sound_t *sound;
- int rc, rc_rec, rc_play;
+ int rc;
if (channels < 1 || channels > 2) {
PDEBUG(DSOUND, DEBUG_ERROR, "Cannot use more than two channels with the same sound card!\n");
@@ -147,49 +197,13 @@ void *sound_open(const char *audiodev, double __attribute__((unused)) *tx_freque
return NULL;
}
+ sound->audiodev = strdup(audiodev);
+ sound->channels = channels;
+ sound->samplerate = samplerate;
sound->spl_deviation = max_deviation / 32767.0;
sound->paging_phaseshift = 1.0 / ((double)samplerate / 1000.0);
- rc_play = snd_pcm_open(&sound->phandle, audiodev, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
- rc_rec = snd_pcm_open(&sound->chandle, audiodev, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
- if (rc_play < 0 && rc_rec < 0) {
- PDEBUG(DSOUND, DEBUG_ERROR, "Failed to open '%s'! (%s)\n", audiodev, snd_strerror(rc_play));
- PDEBUG(DSOUND, DEBUG_ERROR, "Run 'aplay -l' to get a list of available cards and devices.\n");
- PDEBUG(DSOUND, DEBUG_ERROR, "Then use 'hw:<card>:<device>' for audio device.\n");
- goto error;
- }
- if (rc_play < 0) {
- PDEBUG(DSOUND, DEBUG_ERROR, "Failed to open '%s' for playback! (%s) Please select a device that supports both direction audio.\n", audiodev, snd_strerror(rc_play));
- goto error;
- }
- if (rc_rec < 0) {
- PDEBUG(DSOUND, DEBUG_ERROR, "Failed to open '%s' for capture! (%s) Please select a device that supports both direction audio.\n", audiodev, snd_strerror(rc_rec));
- goto error;
- }
-
- rc = set_hw_params(sound->phandle, samplerate, &sound->pchannels);
- if (rc < 0) {
- PDEBUG(DSOUND, DEBUG_ERROR, "Failed to set playback hw params\n");
- goto error;
- }
- if (sound->pchannels < channels) {
- PDEBUG(DSOUND, DEBUG_ERROR, "Sound card only supports %d channel for playback.\n", sound->pchannels);
- goto error;
- }
- PDEBUG(DSOUND, DEBUG_DEBUG, "Playback with %d channels.\n", sound->pchannels);
-
- rc = set_hw_params(sound->chandle, samplerate, &sound->cchannels);
- if (rc < 0) {
- PDEBUG(DSOUND, DEBUG_ERROR, "Failed to set capture hw params\n");
- goto error;
- }
- if (sound->cchannels < channels) {
- PDEBUG(DSOUND, DEBUG_ERROR, "Sound card only supports %d channel for capture.\n", sound->cchannels);
- goto error;
- }
- PDEBUG(DSOUND, DEBUG_DEBUG, "Capture with %d channels.\n", sound->cchannels);
-
- rc = sound_prepare(sound);
+ rc = dev_open(sound);
if (rc < 0)
goto error;
@@ -228,10 +242,8 @@ void sound_close(void *inst)
{
sound_t *sound = (sound_t *)inst;
- if (sound->phandle != NULL)
- snd_pcm_close(sound->phandle);
- if (sound->chandle != NULL)
- snd_pcm_close(sound->chandle);
+ dev_close(sound);
+ free(sound->audiodev);
free(sound);
}
@@ -344,8 +356,12 @@ int sound_write(void *inst, sample_t **samples, uint8_t __attribute__((unused))
if (rc < 0) {
PDEBUG(DSOUND, DEBUG_ERROR, "failed to write audio to interface (%s)\n", snd_strerror(rc));
if (rc == -EPIPE) {
- sound_prepare(sound);
+ dev_close(sound);
+ rc = dev_open(sound);
+ if (rc < 0)
+ return rc;
sound_start(sound);
+ return -EPIPE; /* indicate what happened */
}
return rc;
}
@@ -390,8 +406,12 @@ int sound_read(void *inst, sample_t **samples, int num, int channels, double *rf
PDEBUG(DSOUND, DEBUG_ERROR, "failed to read audio from interface (%s)\n", snd_strerror(rc));
/* recover read */
if (rc == -EPIPE) {
- sound_prepare(sound);
+ dev_close(sound);
+ rc = dev_open(sound);
+ if (rc < 0)
+ return rc;
sound_start(sound);
+ return -EPIPE; /* indicate what happened */
}
return rc;
}
@@ -464,8 +484,12 @@ int sound_get_tosend(void *inst, int latspl)
else
PDEBUG(DSOUND, DEBUG_ERROR, "failed to get delay from interface (%s)\n", snd_strerror(rc));
if (rc == -EPIPE) {
- sound_prepare(sound);
+ dev_close(sound);
+ rc = dev_open(sound);
+ if (rc < 0)
+ return rc;
sound_start(sound);
+ return -EPIPE; /* indicate what happened */
}
return rc;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-23 20:49:03 +0000