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example/audio_duplex: add option to test start/stop audio driver

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This commit is contained in:
Matthias Ringwald 2019-03-03 21:07:13 +01:00
parent cbf638a901
commit 04cbc450ea
1 changed files with 61 additions and 10 deletions
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71
example/audio_duplex.c
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@ -42,6 +42,16 @@
#include "btstack.h"
// uncomment to test start/stop of loopback / audio driver
// #define TEST_START_STOP_INTERVAL 5000
#ifdef TEST_START_STOP_INTERVAL
static void stop_loopback(btstack_timer_source_t * ts);
#endif
static btstack_timer_source_t start_stop_timer;
// samplerate
const uint32_t samplerate = 16000;
@ -106,6 +116,56 @@ static void audio_playback(int16_t * pcm_buffer, uint16_t num_samples_to_write){
}
}
static void start_loopback(btstack_timer_source_t * ts){
const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance();
const btstack_audio_source_t * audio_source = btstack_audio_source_get_instance();
// prepare audio buffer
btstack_ring_buffer_init(&audio_buffer, (uint8_t*) &audio_buffer_storage[0], sizeof(audio_buffer_storage));
// setup audio: mono input -> stereo output
audio_sink->init(2, samplerate, &audio_playback);
audio_source->init(1, samplerate, &audio_recording);
// start duplex
audio_sink->start_stream();
audio_source->start_stream();
printf("Start Audio Loopback\n");
#ifdef TEST_START_STOP_INTERVAL
// schedule stop
btstack_run_loop_set_timer_handler(ts, &stop_loopback);
btstack_run_loop_set_timer(ts, TEST_START_STOP_INTERVAL);
btstack_run_loop_add_timer(ts);
#endif
}
#ifdef TEST_START_STOP_INTERVAL
static void stop_loopback(btstack_timer_source_t * ts){
const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance();
const btstack_audio_source_t * audio_source = btstack_audio_source_get_instance();
// stop streams
audio_sink->stop_stream();
audio_source->stop_stream();
// close audio
audio_sink->close();
audio_source->close();
playback_started = 0;
printf("Stop Audio Loopback\n");
// schedule stop
btstack_run_loop_set_timer_handler(ts, &start_loopback);
btstack_run_loop_set_timer(ts, TEST_START_STOP_INTERVAL);
btstack_run_loop_add_timer(ts);
}
#endif
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
(void)argc;
@ -124,16 +184,7 @@ int btstack_main(int argc, const char * argv[]){
return 10;
}
// prepare audio buffer
btstack_ring_buffer_init(&audio_buffer, (uint8_t*) &audio_buffer_storage[0], sizeof(audio_buffer_storage));
// setup audio: mono input -> stereo output
audio_sink->init(2, samplerate, &audio_playback);
audio_source->init(1, samplerate, &audio_recording);
// start duplex
audio_sink->start_stream();
audio_source->start_stream();
start_loopback(&start_stop_timer);
return 0;
}