static int host_recv_pkt_cb(uint8_t *data, uint16_t len){
if (xPortInIsrContext()){
report_recv_called_from_isr();
return 0;
}
xSemaphoreTake(ring_buffer_mutex, portMAX_DELAY);
// check space
uint16_t space = btstack_ring_buffer_bytes_free(&hci_ringbuffer);
if (space < len){
xSemaphoreGive(ring_buffer_mutex);
log_error("transport_recv_pkt_cb packet %u, space %u -> dropping packet", len, space);
return 0;
}
// store size in ringbuffer
uint8_t len_tag[2];
little_endian_store_16(len_tag, 0, len);
btstack_ring_buffer_write(&hci_ringbuffer, len_tag, sizeof(len_tag));
// store in ringbuffer
btstack_ring_buffer_write(&hci_ringbuffer, data, len);
xSemaphoreGive(ring_buffer_mutex);
// set flag and trigger delivery of packets on main thread
transport_packets_to_deliver = 1;
btstack_run_loop_freertos_trigger();
return 0;
}
static void handle_pcm_data(int16_t * data, int num_samples, int num_channels, int sample_rate, void * context){
UNUSED(sample_rate);
UNUSED(context);
#ifdef STORE_SBC_TO_WAV_FILE
wav_writer_write_int16(num_samples*num_channels, data);
frame_count++;
#endif
total_num_samples+=num_samples*num_channels;
#ifdef HAVE_PORTAUDIO
if (!pa_stream_started){
/* -- start stream -- */
PaError err = Pa_StartStream(stream);
if (err != paNoError){
printf("Error starting the stream: \"%s\"\n", Pa_GetErrorText(err));
return;
}
pa_stream_started = 1;
pa_stream_paused = 1;
}
btstack_ring_buffer_write(&ring_buffer, (uint8_t *)data, num_samples*num_channels*2);
#endif
}
static void handle_pcm_data(int16_t * data, int num_samples, int num_channels, int sample_rate, void * context){
UNUSED(context);
UNUSED(sample_rate);
UNUSED(data);
UNUSED(num_samples);
UNUSED(num_channels);
#if (SCO_DEMO_MODE == SCO_DEMO_MODE_SINE) || (SCO_DEMO_MODE == SCO_DEMO_MODE_MICROPHONE)
// printf("handle_pcm_data num samples %u, sample rate %d\n", num_samples, num_channels);
#ifdef HAVE_PORTAUDIO
// samples in callback in host endianess, ready for PortAudio playback
btstack_ring_buffer_write(&pa_output_ring_buffer, (uint8_t *)data, num_samples*num_channels*2);
#endif /* HAVE_PORTAUDIO */
#ifdef SCO_WAV_FILENAME
if (!num_samples_to_write) return;
num_samples = btstack_min(num_samples, num_samples_to_write);
num_samples_to_write -= num_samples;
wav_writer_write_int16(num_samples, data);
if (num_samples_to_write == 0){
wav_writer_close();
}
#endif /* SCO_WAV_FILENAME */
#endif /* Demo mode sine or microphone */
}
static int portaudio_callback( const void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData ) {
(void) timeInfo; /* Prevent unused variable warnings. */
(void) statusFlags;
(void) inputBuffer;
(void) userData;
// output part
// config based on codec
int bytes_to_copy;
uint32_t prebuffer_bytes;
switch (negotiated_codec){
case HFP_CODEC_MSBC:
bytes_to_copy = framesPerBuffer * MSBC_BYTES_PER_FRAME;
prebuffer_bytes = MSBC_PA_PREBUFFER_BYTES;
break;
case HFP_CODEC_CVSD:
bytes_to_copy = framesPerBuffer * CVSD_BYTES_PER_FRAME;
prebuffer_bytes = CVSD_PA_PREBUFFER_BYTES;
break;
default:
bytes_to_copy = framesPerBuffer * 2; // assume 1 channel / 16 bit audio samples
prebuffer_bytes = 0xfffffff;
break;
}
// fill with silence while paused
if (pa_output_paused){
if (btstack_ring_buffer_bytes_available(&pa_output_ring_buffer) < prebuffer_bytes){
memset(outputBuffer, 0, bytes_to_copy);
return 0;
} else {
// resume playback
pa_output_paused = 0;
}
}
// get data from ringbuffer
uint32_t bytes_read = 0;
btstack_ring_buffer_read(&pa_output_ring_buffer, outputBuffer, bytes_to_copy, &bytes_read);
bytes_to_copy -= bytes_read;
// fill with 0 if not enough
if (bytes_to_copy){
memset(outputBuffer + bytes_read, 0, bytes_to_copy);
pa_output_paused = 1;
}
// end of output part
// input part -- just store in ring buffer
#ifdef USE_PORTAUDIO_INPUT
btstack_ring_buffer_write(&pa_input_ring_buffer, (uint8_t *)inputBuffer, framesPerBuffer * 2);
pa_input_counter += framesPerBuffer * 2;
#endif
return 0;
}
static void handle_pcm_data(int16_t * data, int num_samples, int num_channels, int sample_rate, void * context){
UNUSED(sample_rate);
UNUSED(context);
#ifdef STORE_SBC_TO_WAV_FILE
wav_writer_write_int16(num_samples*num_channels, data);
frame_count++;
#endif
#ifdef HAVE_PORTAUDIO
// store pcm samples in ring buffer
btstack_ring_buffer_write(&ring_buffer, (uint8_t *)data, num_samples*num_channels*2);
if (!audio_stream_started){
audio_stream_paused = 1;
/* -- start stream -- */
PaError err = Pa_StartStream(stream);
if (err != paNoError){
printf("Error starting the stream: \"%s\"\n", Pa_GetErrorText(err));
return;
}
audio_stream_started = 1;
}
#endif
#ifdef HAVE_AUDIO_DMA
// store in ring buffer
uint8_t * write_data = start_of_buffer(write_buffer);
uint16_t len = num_samples*num_channels*2;
memcpy(write_data, data, len);
audio_samples_len[write_buffer] = len;
// add/drop audio frame to fix drift
if (sbc_samples_fix > 0){
memcpy(write_data + len, write_data + len - 4, 4);
audio_samples_len[write_buffer] += 4;
}
if (sbc_samples_fix < 0){
audio_samples_len[write_buffer] -= 4;
}
write_buffer = next_buffer(write_buffer);
#endif
}
static void fill_ring_buffer(void *userData){
paTestData *data = (paTestData*)userData;
while (btstack_ring_buffer_bytes_free(&ring_buffer) > BYTES_PER_FRAME){
uint8_t write_data[BYTES_PER_FRAME];
*(int16_t*)&write_data[0] = data->sine[data->left_phase];
*(int16_t*)&write_data[2] = data->sine[data->right_phase];
btstack_ring_buffer_write(&ring_buffer, write_data, BYTES_PER_FRAME);
write_wav_data((int16_t*)write_data, 1, NUM_CHANNELS, SAMPLE_RATE);
data->left_phase += 1;
if (data->left_phase >= TABLE_SIZE){
data->left_phase -= TABLE_SIZE;
}
data->right_phase += 2; /* higher pitch so we can distinguish left and right. */
if (data->right_phase >= TABLE_SIZE){
data->right_phase -= TABLE_SIZE;
}
}
}
static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size){
UNUSED(seid);
int pos = 0;
avdtp_media_packet_header_t media_header;
if (!read_media_data_header(packet, size, &pos, &media_header)) return;
avdtp_sbc_codec_header_t sbc_header;
if (!read_sbc_header(packet, size, &pos, &sbc_header)) return;
#ifdef HAVE_AUDIO_DMA
// store sbc frame size for buffer management
sbc_frame_size = (size-pos)/ sbc_header.num_frames;
#endif
#if defined(HAVE_PORTAUDIO) || defined(STORE_SBC_TO_WAV_FILE)
btstack_sbc_decoder_process_data(&state, 0, packet+pos, size-pos);
#endif
#ifdef HAVE_AUDIO_DMA
btstack_ring_buffer_write(&ring_buffer, packet+pos, size-pos);
// decide on audio sync drift based on number of sbc frames in queue
int sbc_frames_in_buffer = btstack_ring_buffer_bytes_available(&ring_buffer) / sbc_frame_size;
if (sbc_frames_in_buffer < OPTIMAL_FRAMES_MIN){
sbc_samples_fix = 1; // duplicate last sample
} else if (sbc_frames_in_buffer <= OPTIMAL_FRAMES_MAX){
sbc_samples_fix = 0; // nothing to do
} else {
sbc_samples_fix = -1; // drop last sample
}
// dump
printf("%6u %03u %d\n", (int) btstack_run_loop_get_time_ms(), sbc_frames_in_buffer, sbc_samples_fix);
#endif
#ifdef STORE_SBC_TO_SBC_FILE
fwrite(packet+pos, size-pos, 1, sbc_file);
#endif
}
static void sco_demo_receive_CVSD(uint8_t * packet, uint16_t size){
if (!num_samples_to_write) return;
int16_t audio_frame_out[128]; //
if (size > sizeof(audio_frame_out)){
printf("sco_demo_receive_CVSD: SCO packet larger than local output buffer - dropping data.\n");
return;
}
#if defined(SCO_WAV_FILENAME) || defined(USE_PORTAUDIO)
const int audio_bytes_read = size - 3;
const int num_samples = audio_bytes_read / CVSD_BYTES_PER_FRAME;
// convert into host endian
int16_t audio_frame_in[128];
int i;
for (i=0;i<num_samples;i++){
audio_frame_in[i] = little_endian_read_16(packet, 3 + i * 2);
}
btstack_cvsd_plc_process_data(&cvsd_plc_state, audio_frame_in, num_samples, audio_frame_out);
#endif
#ifdef SCO_WAV_FILENAME
// Samples in CVSD SCO packet are in little endian, ready for wav files (take shortcut)
const int samples_to_write = btstack_min(num_samples, num_samples_to_write);
wav_writer_write_le_int16(samples_to_write, audio_frame_out);
num_samples_to_write -= samples_to_write;
if (num_samples_to_write == 0){
wav_writer_close();
}
#endif
#ifdef USE_PORTAUDIO
btstack_ring_buffer_write(&pa_output_ring_buffer, (uint8_t *)audio_frame_out, audio_bytes_read);
#endif
}