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improve switch audio driver buffering behaviour

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misson20000 2017-12-25 00:09:21 -08:00 committed by twinaphex
parent 033a7259b4
commit 1d6e8baa03
1 changed files with 26 additions and 13 deletions
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27
audio/drivers/switch_audio.c
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@ -40,6 +40,8 @@ typedef struct {
audio_output_buffer_t *current_buffer;
bool blocking;
bool is_paused;
uint64_t last_append;
unsigned latency;
} switch_audio_t;
static ssize_t switch_audio_write(void *data, const void *buf, size_t size) {
@ -53,7 +55,7 @@ static ssize_t switch_audio_write(void *data, const void *buf, size_t size) {
printf("failed to get released buffer?\n");
return -1;
}
printf("got buffer, num %d, ptr %p\n", num, swa->current_buffer);
//printf("got buffer, num %d, ptr %p\n", num, swa->current_buffer);
if(num < 1) {
swa->current_buffer = NULL;
}
@ -72,28 +74,34 @@ static ssize_t switch_audio_write(void *data, const void *buf, size_t size) {
}
}
} else {
printf("no buffer, nonblocking...\n");
//printf("no buffer, nonblocking...\n");
return 0;
}
}
swa->current_buffer->data_size = 0;
}
size_t to_write = size;
if(size > sample_buffer_size) {
size = sample_buffer_size;
if(to_write > sample_buffer_size - swa->current_buffer->data_size) {
to_write = sample_buffer_size - swa->current_buffer->data_size;
}
memcpy(swa->current_buffer->sample_data, buf, to_write);
swa->current_buffer->data_size = to_write;
memcpy(((uint8_t*) swa->current_buffer->sample_data) + swa->current_buffer->data_size, buf, to_write);
swa->current_buffer->data_size+= to_write;
swa->current_buffer->buffer_size = sample_buffer_size;
if(swa->current_buffer->data_size > (48000*swa->latency)/1000) {
result_t r;
if((r = audio_ipc_output_append_buffer(&swa->output, swa->current_buffer)) != RESULT_OK) {
printf("failed to append buffer: 0x%x\n", r);
return -1;
}
swa->current_buffer = NULL;
}
//printf("submitted samples\n");
//printf("submitted %ld samples, %ld samples since last submit\n", to_write/num_channels/sizeof(uint16_t), (svcGetSystemTick() - swa->last_append) * sample_rate / 19200000);
swa->last_append = svcGetSystemTick();
return to_write;
}
@ -107,6 +115,8 @@ static bool switch_audio_stop(void *data) {
static bool switch_audio_start(void *data, bool is_shutdown) {
switch_audio_t *swa = (switch_audio_t*) data;
printf("start\n");
if(audio_ipc_output_start(&swa->output) != RESULT_OK) {
return false;
}
@ -214,6 +224,9 @@ static void *switch_audio_init(const char *device,
}
swa->current_buffer = NULL;
swa->latency = latency;
swa->last_append = svcGetSystemTick();
if(audio_ipc_output_start(&swa->output) != RESULT_OK) {
goto fail_audio_output;