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example/audio_duplex: improve for stereo input

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This commit is contained in:
Matthias Ringwald 2021-12-28 15:40:13 +01:00
parent 0e83ff1de7
commit f5cfc39fc2
1 changed files with 5 additions and 5 deletions
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10
example/audio_duplex.c
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@ -63,12 +63,12 @@ const uint32_t samplerate = 16000;
// ring buffer for audio
#define BUFFER_SAMPLES 1024
static uint16_t audio_buffer_storage[BUFFER_SAMPLES];
static uint16_t audio_buffer_storage[BUFFER_SAMPLES * NUM_INPUT_CHANNELS];
static btstack_ring_buffer_t audio_buffer;
// transfer buffer
#define TRANSFER_BUFFER_LEN 128
static int16_t transfer_buffer[TRANSFER_BUFFER_LEN];
#define TRANSFER_SAMPLES 128
static int16_t transfer_buffer[TRANSFER_SAMPLES * NUM_INPUT_CHANNELS];
// playback starts after audio_buffer is half full
static int playback_started;
@ -96,7 +96,7 @@ static void audio_playback(int16_t * pcm_buffer, uint16_t num_samples_to_write){
num_samples_in_buffer = btstack_ring_buffer_bytes_available(&audio_buffer) / BYTES_PER_SAMPLE;
int num_samples_ready = btstack_min(num_samples_in_buffer, num_samples_to_write);
// limit by transfer_buffer
int num_samples_from_buffer = btstack_min(num_samples_ready, TRANSFER_BUFFER_LEN);
int num_samples_from_buffer = btstack_min(num_samples_ready, TRANSFER_SAMPLES);
if (!num_samples_from_buffer) break;
uint32_t bytes_read;
btstack_ring_buffer_read(&audio_buffer, (uint8_t *) transfer_buffer, num_samples_from_buffer * BYTES_PER_SAMPLE, &bytes_read);
@ -208,4 +208,4 @@ int btstack_main(int argc, const char * argv[]){
return 0;
}
/* EXAMPLE_END */
/* EXAMPLE_END */