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stm32-f4discovery-cc256x: commented code to measure sample rate

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This commit is contained in:
Matthias Ringwald 2019-02-21 15:24:40 +01:00
parent c5fccf8bfc
commit 2948493268
1 changed files with 29 additions and 0 deletions
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29
port/stm32-f4discovery-cc256x/src/hal_audio_f4discovery.c
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@ -36,22 +36,51 @@
*/
#include "hal_audio.h"
#include "btstack_debug.h"
#include "stm32f4_discovery_audio.h"
#define OUTPUT_BUFFER_NUM_SAMPLES 512
#define NUM_OUTPUT_BUFFERS 2
// #define MEASURE_SAMPLE_RATE
static void (*audio_played_handler)(uint8_t buffer_index);
static int started;
// our storage
static int16_t output_buffer[NUM_OUTPUT_BUFFERS * OUTPUT_BUFFER_NUM_SAMPLES * 2]; // stereo
#ifdef MEASURE_SAMPLE_RATE
static uint32_t stream_start_ms;
static uint32_t stream_samples;
#endif
void BSP_AUDIO_OUT_HalfTransfer_CallBack(void){
#ifdef MEASURE_SAMPLE_RATE
if (stream_start_ms == 0){
stream_start_ms = btstack_run_loop_get_time_ms();
} else {
stream_samples++;
}
#endif
(*audio_played_handler)(0);
}
void BSP_AUDIO_OUT_TransferComplete_CallBack(void){
#ifdef MEASURE_SAMPLE_RATE
if (stream_samples == 500){
uint32_t now = btstack_run_loop_get_time_ms();
uint32_t delta = now - stream_start_ms;
log_info("Samples per second: %u", stream_samples * OUTPUT_BUFFER_NUM_SAMPLES * 1000 / delta);
stream_start_ms = now;
stream_samples = 0;
}
stream_samples++;
#endif
(*audio_played_handler)(1);
}