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(ALSA) Use macro for determing frames from bytes instead of snd_pcm_bytes_to_frames

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This commit is contained in:
twinaphex 2017-04-20 11:20:34 +02:00
parent d1664481c2
commit 9faae7eb3f
1 changed files with 10 additions and 0 deletions
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10
audio/drivers/alsa.c
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@ -29,6 +29,7 @@ typedef struct alsa
snd_pcm_t *pcm;
size_t buffer_size;
bool nonblock;
unsigned int frame_bits;
bool has_float;
bool can_pause;
bool is_paused;
@ -92,6 +93,9 @@ static void *alsa_init(const char *device, unsigned rate, unsigned latency,
alsa->pcm, params, SND_PCM_ACCESS_RW_INTERLEAVED) < 0)
goto error;
/* channels hardcoded to 2 for now */
alsa->frame_bits = snd_pcm_format_physical_width(format) * 2;
if (snd_pcm_hw_params_set_format(alsa->pcm, params, format) < 0)
goto error;
@ -173,13 +177,19 @@ error:
return NULL;
}
#define BYTES_TO_FRAMES(bytes, frame_bits) ((bytes) * 8 / frame_bits)
static ssize_t alsa_write(void *data, const void *buf_, size_t size_)
{
alsa_t *alsa = (alsa_t*)data;
const uint8_t *buf = (const uint8_t*)buf_;
bool eagain_retry = true;
snd_pcm_sframes_t written = 0;
#if 0
snd_pcm_sframes_t size = snd_pcm_bytes_to_frames(alsa->pcm, size_);
#else
snd_pcm_sframes_t size = BYTES_TO_FRAMES(size_, alsa->frame_bits);
#endif
while (size)
{