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(ALSA QSA) Now infers fragment size from audio hardware - max fragment sizes

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of 1 and 2 gave continuous 'sample got stuck somewhere' errors -
bumping it up to 8 seems to get rid of it but can still produce
the odd audio crackle every minute or so.
This commit is contained in:
twinaphex 2014-05-24 06:12:44 +02:00
parent 491a4a98d8
commit 3c327c99fc
1 changed files with 23 additions and 2 deletions
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23
blackberry-qnx/alsa_qsa.c
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@ -46,6 +46,7 @@ static void *alsa_qsa_init(const char *device, unsigned rate, unsigned latency)
int err, card, dev; int err, card, dev;
snd_pcm_channel_params_t params = {0}; snd_pcm_channel_params_t params = {0};
snd_pcm_channel_info_t pi;
snd_pcm_channel_setup_t setup = {0}; snd_pcm_channel_setup_t setup = {0};
alsa_t *alsa = (alsa_t*)calloc(1, sizeof(alsa_t)); alsa_t *alsa = (alsa_t*)calloc(1, sizeof(alsa_t));
if (!alsa) if (!alsa)
@ -70,6 +71,15 @@ static void *alsa_qsa_init(const char *device, unsigned rate, unsigned latency)
goto error; goto error;
} }
memset(&pi, 0, sizeof(pi));
pi.channel = SND_PCM_CHANNEL_PLAYBACK;
if ((err = snd_pcm_plugin_info(alsa->pcm, &pi)) < 0)
{
RARCH_ERR("[ALSA QSA]: snd_pcm_plugin_info failed: %s\n",
snd_strerror(err));
goto error;
}
memset(&params, 0, sizeof(params)); memset(&params, 0, sizeof(params));
params.channel = SND_PCM_CHANNEL_PLAYBACK; params.channel = SND_PCM_CHANNEL_PLAYBACK;
@ -83,10 +93,21 @@ static void *alsa_qsa_init(const char *device, unsigned rate, unsigned latency)
params.start_mode = SND_PCM_START_FULL; params.start_mode = SND_PCM_START_FULL;
params.stop_mode = SND_PCM_STOP_STOP; params.stop_mode = SND_PCM_STOP_STOP;
params.buf.block.frag_size = MAX_FRAG_SIZE; params.buf.block.frag_size = pi.max_fragment_size;
params.buf.block.frags_min = 1; params.buf.block.frags_min = 1;
params.buf.block.frags_max = 8; params.buf.block.frags_max = 8;
//FIXME: Hack turning on g_extern.verbose
bool original_verbosity = g_extern.verbose;
g_extern.verbose = true;
RARCH_LOG("Fragment size: %d\n", params.buf.block.frag_size);
RARCH_LOG("Min Fragment size: %d\n", params.buf.block.frags_min);
RARCH_LOG("Max Fragment size: %d\n", params.buf.block.frags_max);
//FIXME: Hack turning on/off g_extern.verbose
g_extern.verbose = original_verbosity;
if ((err = snd_pcm_plugin_params(alsa->pcm, &params)) < 0) if ((err = snd_pcm_plugin_params(alsa->pcm, &params)) < 0)
{ {
RARCH_ERR("[ALSA QSA]: Channel Parameter Error: %s\n", snd_strerror(err)); RARCH_ERR("[ALSA QSA]: Channel Parameter Error: %s\n", snd_strerror(err));