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esp32: support mono audio input

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This commit is contained in:
Matthias Ringwald 2021-12-28 15:53:39 +01:00
parent b57bbaee10
commit c93c6de44c
1 changed files with 9 additions and 2 deletions
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11
port/esp32/components/btstack/btstack_audio_esp32.c
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@ -363,8 +363,16 @@ static void btstack_audio_esp32_source_process_buffer(void){
size_t bytes_read;
uint8_t buffer[DMA_BUFFER_SAMPLES * BYTES_PER_SAMPLE_STEREO];
i2s_read(BTSTACK_AUDIO_I2S_NUM, buffer, DMA_BUFFER_SAMPLES * BYTES_PER_SAMPLE_STEREO, &bytes_read, portMAX_DELAY);
int16_t * buffer16 = (int16_t *) buffer;
if (btstack_audio_esp32_source_state == BTSTACK_AUDIO_ESP32_STREAMING) {
(*btstack_audio_esp32_source_recording_callback)((int16_t *) buffer, DMA_BUFFER_SAMPLES);
// drop second channel if configured for mono
if (btstack_audio_esp32_source_num_channels == 1){
uint16_t i;
for (i=0;i<DMA_BUFFER_SAMPLES;i++){
buffer16[i] = buffer16[2*i];
}
}
(*btstack_audio_esp32_source_recording_callback)(buffer16, DMA_BUFFER_SAMPLES);
}
}
@ -374,7 +382,6 @@ static int btstack_audio_esp32_source_init(
void (*recording)(const int16_t * buffer, uint16_t num_samples)
){
btstack_assert(recording != NULL);
btstack_assert(channels == 2);
// store config
btstack_audio_esp32_source_recording_callback = recording;