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rearranged and fixed alsa init code

master
Ahmet Inan 2015-02-23 13:29:52 +01:00
rodzic b7bb471c4f
commit c609ba488f
1 zmienionych plików z 108 dodań i 121 usunięć
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229
alsa.c
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@ -79,6 +79,64 @@ int write_alsa(struct pcm *pcm, short *buff, int frames)
int open_alsa_read(struct pcm **p, char *name)
{
snd_pcm_t *pcm;
if (snd_pcm_open(&pcm, name, SND_PCM_STREAM_CAPTURE, 0) < 0) {
fprintf(stderr, "Error opening PCM device %s\n", name);
return 0;
}
snd_pcm_hw_params_t *params;
snd_pcm_hw_params_alloca(&params);
if (snd_pcm_hw_params_any(pcm, params) < 0) {
fprintf(stderr, "Can not configure this PCM device.\n");
snd_pcm_close(pcm);
return 0;
}
if (snd_pcm_hw_params_set_access(pcm, params, SND_PCM_ACCESS_RW_INTERLEAVED) < 0) {
fprintf(stderr, "Error setting access.\n");
snd_pcm_close(pcm);
return 0;
}
if (snd_pcm_hw_params_set_format(pcm, params, SND_PCM_FORMAT_S16_LE) < 0) {
fprintf(stderr, "Error setting S16_LE format.\n");
snd_pcm_close(pcm);
return 0;
}
if (snd_pcm_hw_params_set_rate_resample(pcm, params, 0) < 0) {
fprintf(stderr, "Error disabling resampling.\n");
snd_pcm_close(pcm);
return 0;
}
unsigned rate_min = 8000;
int dir_min = 0;
if (snd_pcm_hw_params_set_rate_min(pcm, params, &rate_min, &dir_min) < 0 || rate_min < 8000) {
fprintf(stderr, "Error setting min rate.\n");
snd_pcm_close(pcm);
return 0;
}
if (snd_pcm_hw_params(pcm, params) < 0) {
fprintf(stderr, "Error setting HW params.\n");
snd_pcm_close(pcm);
return 0;
}
unsigned int rate = 0;
if (snd_pcm_hw_params_get_rate(params, &rate, 0) < 0) {
fprintf(stderr, "Error getting rate.\n");
snd_pcm_close(pcm);
return 0;
}
unsigned int channels = 0;
if (snd_pcm_hw_params_get_channels(params, &channels) < 0) {
fprintf(stderr, "Error getting channels.\n");
snd_pcm_close(pcm);
return 0;
}
struct alsa *alsa = (struct alsa *)malloc(sizeof(struct alsa));
alsa->base.close = close_alsa;
alsa->base.info = info_alsa;
@ -87,73 +145,6 @@ int open_alsa_read(struct pcm **p, char *name)
alsa->base.rw = read_alsa;
alsa->base.data = (void *)alsa;
snd_pcm_t *pcm;
snd_pcm_hw_params_t *params;
snd_pcm_hw_params_alloca(&params);
if (snd_pcm_open(&pcm, name, SND_PCM_STREAM_CAPTURE, 0) < 0) {
fprintf(stderr, "Error opening PCM device %s\n", name);
free(alsa);
return 0;
}
if (snd_pcm_hw_params_any(pcm, params) < 0) {
fprintf(stderr, "Can not configure this PCM device.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
if (snd_pcm_hw_params_set_access(pcm, params, SND_PCM_ACCESS_RW_INTERLEAVED) < 0) {
fprintf(stderr, "Error setting access.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
if (snd_pcm_hw_params_set_format(pcm, params, SND_PCM_FORMAT_S16_LE) < 0) {
fprintf(stderr, "Error setting S16_LE format.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
if (snd_pcm_hw_params_set_rate_resample(pcm, params, 0) < 0) {
fprintf(stderr, "Error disabling resampling.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
unsigned rate_min = 8000;
int dir_min = 0;
if (snd_pcm_hw_params_set_rate_min(pcm, params, &rate_min, &dir_min) < 0 || rate_min < 8000) {
fprintf(stderr, "Error setting min rate.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
if (snd_pcm_hw_params(pcm, params) < 0) {
fprintf(stderr, "Error setting HW params.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
unsigned int rate = 0;
if (snd_pcm_hw_params_get_rate(params, &rate, 0) < 0) {
fprintf(stderr, "Error getting rate.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
unsigned int channels = 0;
if (snd_pcm_hw_params_get_channels(params, &channels) < 0) {
fprintf(stderr, "Error getting channels.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
alsa->pcm = pcm;
alsa->r = rate;
alsa->c = channels;
@ -164,6 +155,56 @@ int open_alsa_read(struct pcm **p, char *name)
int open_alsa_write(struct pcm **p, char *name, int rate, int channels, float seconds)
{
snd_pcm_t *pcm;
if (snd_pcm_open(&pcm, name, SND_PCM_STREAM_PLAYBACK, 0) < 0) {
fprintf(stderr, "Error opening PCM device %s\n", name);
return 0;
}
snd_pcm_hw_params_t *params;
snd_pcm_hw_params_alloca(&params);
if (snd_pcm_hw_params_any(pcm, params) < 0) {
fprintf(stderr, "Can not configure this PCM device.\n");
snd_pcm_close(pcm);
return 0;
}
if (snd_pcm_hw_params_set_access(pcm, params, SND_PCM_ACCESS_RW_INTERLEAVED) < 0) {
fprintf(stderr, "Error setting access.\n");
snd_pcm_close(pcm);
return 0;
}
if (snd_pcm_hw_params_set_format(pcm, params, SND_PCM_FORMAT_S16_LE) < 0) {
fprintf(stderr, "Error setting S16_LE format.\n");
snd_pcm_close(pcm);
return 0;
}
if (snd_pcm_hw_params_set_rate_resample(pcm, params, 0) < 0) {
fprintf(stderr, "Error disabling resampling.\n");
snd_pcm_close(pcm);
return 0;
}
if (snd_pcm_hw_params_set_rate_near(pcm, params, (unsigned int *)&rate, 0) < 0) {
fprintf(stderr, "Error setting rate.\n");
snd_pcm_close(pcm);
return 0;
}
if (snd_pcm_hw_params_set_channels_near(pcm, params, (unsigned int *)&channels) < 0) {
fprintf(stderr, "Error setting channels.\n");
snd_pcm_close(pcm);
return 0;
}
if (snd_pcm_hw_params(pcm, params) < 0) {
fprintf(stderr, "Error setting HW params.\n");
snd_pcm_close(pcm);
return 0;
}
struct alsa *alsa = (struct alsa *)malloc(sizeof(struct alsa));
alsa->base.close = close_alsa;
alsa->base.info = info_alsa;
@ -172,60 +213,6 @@ int open_alsa_write(struct pcm **p, char *name, int rate, int channels, float se
alsa->base.rw = write_alsa;
alsa->base.data = (void *)alsa;
snd_pcm_t *pcm;
snd_pcm_hw_params_t *params;
snd_pcm_hw_params_alloca(&params);
if (snd_pcm_open(&pcm, name, SND_PCM_STREAM_PLAYBACK, 0) < 0) {
fprintf(stderr, "Error opening PCM device %s\n", name);
free(alsa);
return 0;
}
if (snd_pcm_hw_params_any(pcm, params) < 0) {
fprintf(stderr, "Can not configure this PCM device.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
if (snd_pcm_hw_params_set_access(pcm, params, SND_PCM_ACCESS_RW_INTERLEAVED) < 0) {
fprintf(stderr, "Error setting access.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
if (snd_pcm_hw_params_set_format(pcm, params, SND_PCM_FORMAT_S16_LE) < 0) {
fprintf(stderr, "Error setting S16_LE format.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
if (snd_pcm_hw_params_set_rate_resample(pcm, params, 0) < 0) {
fprintf(stderr, "Error disabling resampling.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
if (snd_pcm_hw_params_set_rate_near(pcm, params, (unsigned int *)&rate, 0) < 0) {
fprintf(stderr, "Error setting rate.\n");
return 0;
}
if (snd_pcm_hw_params_set_channels_near(pcm, params, (unsigned int *)&channels) < 0) {
fprintf(stderr, "Error setting channels.\n");
return 0;
}
if (snd_pcm_hw_params(pcm, params) < 0) {
fprintf(stderr, "Error setting HW params.\n");
snd_pcm_close(alsa->pcm);
free(alsa);
return 0;
}
alsa->pcm = pcm;
alsa->r = rate;
alsa->c = channels;