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sco_util_demo: enable to start/stop audio multiple times

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This commit is contained in:
Matthias Ringwald 2017-01-20 15:39:39 +01:00
parent b038503d09
commit e4f319364d
1 changed files with 55 additions and 21 deletions
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74
example/sco_demo_util.c
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@ -102,7 +102,8 @@
// portaudio globals
static PaStream * stream;
static uint8_t pa_stream_started = 0;
static int pa_stream_started = 0;
static int pa_stream_paused = 0;
static uint8_t ring_buffer_storage[2*MSBC_PREBUFFER_BYTES];
static btstack_ring_buffer_t ring_buffer;
@ -111,7 +112,7 @@ static btstack_ring_buffer_t ring_buffer;
static int dump_data = 1;
static int count_sent = 0;
static int count_received = 0;
static uint8_t negotiated_codec = 0;
static int negotiated_codec = -1;
#if SCO_DEMO_MODE != SCO_DEMO_MODE_55
static int phase = 0;
#endif
@ -189,21 +190,38 @@ static int patestCallback( const void *inputBuffer, void *outputBuffer,
(void) inputBuffer;
(void) userData;
uint32_t bytes_read = 0;
int bytes_per_buffer = framesPerBuffer;
// config based on codec
int bytes_to_copy;
int prebuffer_bytes;
if (negotiated_codec == HFP_CODEC_MSBC){
bytes_per_buffer *= MSBC_BYTES_PER_FRAME;
bytes_to_copy = framesPerBuffer * MSBC_BYTES_PER_FRAME;
prebuffer_bytes = MSBC_PREBUFFER_BYTES;
} else {
bytes_per_buffer *= CVSD_BYTES_PER_FRAME;
bytes_to_copy = framesPerBuffer * CVSD_BYTES_PER_FRAME;
prebuffer_bytes = CVSD_PREBUFFER_BYTES;
}
if (btstack_ring_buffer_bytes_available(&ring_buffer) >= bytes_per_buffer){
btstack_ring_buffer_read(&ring_buffer, outputBuffer, bytes_per_buffer, &bytes_read);
} else {
printf("NOT ENOUGH DATA!\n");
memset(outputBuffer, 0, bytes_per_buffer);
// fill with silence while paused
if (pa_stream_paused){
if (btstack_ring_buffer_bytes_available(&ring_buffer) < prebuffer_bytes){
memset(outputBuffer, 0, bytes_to_copy);
return 0;
} else {
// resume playback
pa_stream_paused = 0;
}
}
// get data from ringbuffer
uint32_t bytes_read = 0;
btstack_ring_buffer_read(&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_stream_paused = 1;
}
// printf("bytes avail after read: %d\n", btstack_ring_buffer_bytes_available(&ring_buffer));
return 0;
}
#endif
@ -213,8 +231,8 @@ static void handle_pcm_data(int16_t * data, int num_samples, int num_channels, i
UNUSED(sample_rate);
// printf("handle_pcm_data num samples %u, sample rate %d\n", num_samples, num_channels);
#ifdef USE_PORTAUDIO
if (!pa_stream_started && btstack_ring_buffer_bytes_available(&ring_buffer) >= MSBC_PREBUFFER_BYTES){
#ifdef HAVE_PORTAUDIO
if (!pa_stream_started){
/* -- start stream -- */
PaError err = Pa_StartStream(stream);
if (err != paNoError){
@ -222,9 +240,9 @@ static void handle_pcm_data(int16_t * data, int num_samples, int num_channels, i
return;
}
pa_stream_started = 1;
pa_stream_paused = 1;
}
btstack_ring_buffer_write(&ring_buffer, (uint8_t *)data, num_samples*num_channels*2);
// printf("bytes avail after write: %d\n", btstack_ring_buffer_bytes_available(&ring_buffer));
#else
UNUSED(num_channels);
#endif
@ -242,6 +260,8 @@ static void handle_pcm_data(int16_t * data, int num_samples, int num_channels, i
}
static void sco_demo_init_mSBC(void){
printf("SCO Demo: Init CVSD\n");
int sample_rate = 16000;
wav_writer_open(SCO_WAV_FILENAME, 1, sample_rate);
btstack_sbc_decoder_init(&decoder_state, SBC_MODE_mSBC, &handle_pcm_data, NULL);
@ -265,6 +285,7 @@ static void sco_demo_init_mSBC(void){
PaStreamParameters outputParameters;
/* -- initialize PortAudio -- */
printf("PortAudio: Initialize\n");
err = Pa_Initialize();
if( err != paNoError ) return;
/* -- setup input and output -- */
@ -274,6 +295,7 @@ static void sco_demo_init_mSBC(void){
outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
/* -- setup stream -- */
printf("PortAudio: Open stream\n");
err = Pa_OpenStream(
&stream,
NULL, // &inputParameters,
@ -284,7 +306,7 @@ static void sco_demo_init_mSBC(void){
patestCallback, /* no callback, use blocking API */
NULL ); /* no callback, so no callback userData */
if (err != paNoError){
printf("Error initializing portaudio: \"%s\"\n", Pa_GetErrorText(err));
printf("Error opening portaudio stream: \"%s\"\n", Pa_GetErrorText(err));
return;
}
memset(ring_buffer_storage, 0, sizeof(ring_buffer_storage));
@ -304,6 +326,8 @@ static void sco_demo_receive_mSBC(uint8_t * packet, uint16_t size){
}
static void sco_demo_init_CVSD(void){
printf("SCO Demo: Init CVSD\n");
int sample_rate = 8000;
wav_writer_open(SCO_WAV_FILENAME, 1, sample_rate);
btstack_cvsd_plc_init(&cvsd_plc_state);
@ -314,6 +338,7 @@ static void sco_demo_init_CVSD(void){
PaStreamParameters outputParameters;
/* -- initialize PortAudio -- */
printf("PortAudio: Initialize\n");
err = Pa_Initialize();
if( err != paNoError ) return;
/* -- setup input and output -- */
@ -323,6 +348,7 @@ static void sco_demo_init_CVSD(void){
outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
/* -- setup stream -- */
printf("PortAudio: Open stream\n");
err = Pa_OpenStream(
&stream,
NULL, // &inputParameters,
@ -333,7 +359,7 @@ static void sco_demo_init_CVSD(void){
patestCallback, /* no callback, use blocking API */
NULL ); /* no callback, so no callback userData */
if (err != paNoError){
printf("Error initializing portaudio: \"%s\"\n", Pa_GetErrorText(err));
printf("Error opening portaudio stream: \"%s\"\n", Pa_GetErrorText(err));
return;
}
memset(ring_buffer_storage, 0, sizeof(ring_buffer_storage));
@ -362,14 +388,15 @@ static void sco_demo_receive_CVSD(uint8_t * packet, uint16_t size){
sco_demo_close();
}
#ifdef USE_PORTAUDIO
if (!pa_stream_started && btstack_ring_buffer_bytes_available(&ring_buffer) >= CVSD_PREBUFFER_BYTES){
if (!pa_stream_started){
/* -- start stream -- */
PaError err = Pa_StartStream(stream);
if (err != paNoError){
printf("Error starting the stream: \"%s\"\n", Pa_GetErrorText(err));
printf("sco_demo_receive_CVSD: 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 *)audio_frame_out, samples_to_write);
#endif
@ -379,6 +406,7 @@ static void sco_demo_receive_CVSD(uint8_t * packet, uint16_t size){
#endif
void sco_demo_close(void){
printf("SCO demo close\n");
#if SCO_DEMO_MODE == SCO_DEMO_MODE_SINE
#if defined(SCO_WAV_FILENAME) || defined(SCO_SBC_FILENAME)
wav_writer_close();
@ -392,18 +420,21 @@ void sco_demo_close(void){
#ifdef HAVE_PORTAUDIO
if (pa_stream_started){
printf("PortAudio: Stop Stream\n");
PaError err = Pa_StopStream(stream);
if (err != paNoError){
printf("Error stopping the stream: \"%s\"\n", Pa_GetErrorText(err));
return;
}
pa_stream_started = 0;
printf("PortAudio: Close Stream\n");
err = Pa_CloseStream(stream);
if (err != paNoError){
printf("Error closing the stream: \"%s\"\n", Pa_GetErrorText(err));
return;
}
printf("PortAudio: Terminate\n");
err = Pa_Terminate();
if (err != paNoError){
printf("Error terminating portaudio: \"%s\"\n", Pa_GetErrorText(err));
@ -411,8 +442,8 @@ void sco_demo_close(void){
}
}
#endif
#ifdef SCO_WAV_FILENAME
#ifdef SCO_WAV_FILENAME
#if 0
printf("SCO Demo: closing wav file\n");
if (negotiated_codec == HFP_CODEC_MSBC){
@ -425,6 +456,9 @@ void sco_demo_close(void){
}
#endif
#endif
negotiated_codec = -1;
#endif
}