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portaudio: allow to select sink/source audio device

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This commit is contained in:
Matthias Ringwald 2024-05-14 12:19:55 +02:00
parent 14200bb85a
commit 409f627cf8
2 changed files with 70 additions and 18 deletions
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84
platform/posix/btstack_audio_portaudio.c
View File

@ -64,6 +64,9 @@ static int num_channels_source;
static int num_bytes_per_sample_sink;
static int num_bytes_per_sample_source;
static const char * sink_device_name;
static const char * source_device_name = "4-chan";
// portaudio
static int portaudio_initialized;
@ -227,24 +230,42 @@ static int btstack_audio_portaudio_sink_init(
portaudio_initialized = 1;
}
/* -- setup output -- */
PaStreamParameters theOutputParameters;
theOutputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
theOutputParameters.channelCount = channels;
theOutputParameters.sampleFormat = PA_SAMPLE_TYPE;
theOutputParameters.suggestedLatency = Pa_GetDeviceInfo( theOutputParameters.device )->defaultHighOutputLatency;
theOutputParameters.hostApiSpecificStreamInfo = NULL;
/* -- find output device by name if requested -- */
PaDeviceIndex device_index = -1;
const PaDeviceInfo *output_device_info;
if (sink_device_name != NULL){
int num_devices = Pa_GetDeviceCount();
for (int i = 0; i < num_devices; i++) {
output_device_info = Pa_GetDeviceInfo(i);
// Match device by prefix
if (strncmp(output_device_info->name, sink_device_name, strlen(sink_device_name)) == 0) {
device_index = i;
break;
}
}
}
const PaDeviceInfo *outputDeviceInfo;
outputDeviceInfo = Pa_GetDeviceInfo( theOutputParameters.device );
log_info("PortAudio: sink device: %s", outputDeviceInfo->name);
UNUSED(outputDeviceInfo);
/* -- use default device otherwise -- */
if (device_index < 0){
device_index = Pa_GetDefaultOutputDevice();
output_device_info = Pa_GetDeviceInfo(device_index );
}
/* -- setup output -- */
PaStreamParameters output_parameters;
output_parameters.device = device_index;
output_parameters.channelCount = channels;
output_parameters.sampleFormat = PA_SAMPLE_TYPE;
output_parameters.suggestedLatency = output_device_info->defaultHighOutputLatency;
output_parameters.hostApiSpecificStreamInfo = NULL;
log_info("PortAudio: sink device: %s", output_device_info->name);
UNUSED(output_device_info);
/* -- setup stream -- */
err = Pa_OpenStream(
&stream_sink,
NULL,
&theOutputParameters,
&output_parameters,
samplerate,
NUM_FRAMES_PER_PA_BUFFER,
paClipOff, /* we won't output out of range samples so don't bother clipping them */
@ -300,18 +321,37 @@ static int btstack_audio_portaudio_source_init(
portaudio_initialized = 1;
}
/* -- find input device by name if requested -- */
PaDeviceIndex device_index = -1;
const PaDeviceInfo *input_device_info;
if (source_device_name != NULL){
int num_devices = Pa_GetDeviceCount();
for (int i = 0; i < num_devices; i++) {
input_device_info = Pa_GetDeviceInfo(i);
// Match device by prefix
if (strncmp(input_device_info->name, source_device_name, strlen(source_device_name)) == 0) {
device_index = i;
break;
}
}
}
/* -- use default device otherwise -- */
if (device_index < 0){
device_index = Pa_GetDefaultInputDevice();
input_device_info = Pa_GetDeviceInfo(device_index );
}
/* -- setup input -- */
PaStreamParameters theInputParameters;
theInputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
theInputParameters.device = device_index;
theInputParameters.channelCount = channels;
theInputParameters.sampleFormat = PA_SAMPLE_TYPE;
theInputParameters.suggestedLatency = Pa_GetDeviceInfo( theInputParameters.device )->defaultHighInputLatency;
theInputParameters.suggestedLatency = input_device_info->defaultHighInputLatency;
theInputParameters.hostApiSpecificStreamInfo = NULL;
const PaDeviceInfo *inputDeviceInfo;
inputDeviceInfo = Pa_GetDeviceInfo( theInputParameters.device );
log_info("PortAudio: source device: %s", inputDeviceInfo->name);
UNUSED(inputDeviceInfo);
log_info("PortAudio: source device: %s", input_device_info->name);
UNUSED(input_device_info);
/* -- setup stream -- */
err = Pa_OpenStream(
@ -512,4 +552,12 @@ const btstack_audio_source_t * btstack_audio_portaudio_source_get_instance(void)
return &btstack_audio_portaudio_source;
}
void btstack_audio_portaudio_sink_set_device(const char * device_name){
sink_device_name = device_name;
}
void btstack_audio_portaudio_source_set_device(const char * device_name){
source_device_name = device_name;
}
#endif

4
src/btstack_audio.h
View File

@ -177,6 +177,10 @@ const btstack_audio_source_t * btstack_audio_embedded_source_get_instance(void);
const btstack_audio_sink_t * btstack_audio_esp32_sink_get_instance(void);
const btstack_audio_source_t * btstack_audio_esp32_source_get_instance(void);
// platform-specific extension
void btstack_audio_portaudio_sink_set_device(const char * device_name);
void btstack_audio_portaudio_source_set_device(const char * device_name);
/* API_END */
#if defined __cplusplus