mirror/btstack
1
0
Fork 0
mirror of https://github.com/bluekitchen/btstack.git synced 2025-03-29 22:20:37 +00:00
Code Issues Packages Projects Releases Wiki Activity

stm32-f4discovery-cc256x: single PCM recording buffer

Browse Source
This commit is contained in:
Matthias Ringwald 2019-03-02 10:25:28 +01:00
parent e8a3f5a989
commit 46a20e6bfa
1 changed files with 7 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
port/stm32-f4discovery-cc256x/src/hal_audio_f4discovery.c
View File

@ -59,20 +59,17 @@ static uint32_t stream_samples;
#endif
// input
#define INPUT_BUFFER_NUM_SAMPLES 512
#define NUM_INPUT_BUFFERS 2
#define INPUT_BUFFER_NUM_SAMPLES 256
static int recording_started;
static int32_t recording_sample_rate;
static void (*audio_recorded_callback)(const int16_t * buffer, uint16_t num_samples);
static int16_t input_buffer[NUM_INPUT_BUFFERS * INPUT_BUFFER_NUM_SAMPLES]; // mono
static int16_t input_buffer[INPUT_BUFFER_NUM_SAMPLES]; // single mono buffer
// 2048 16-bit samples decimation -> half/complete every 10 ms -> 160 audio samples
static uint16_t pdm_buffer[2048];
#define NUM_SINE_SAMPLES 160
static uint16_t pdm_buffer[INPUT_BUFFER_NUM_SAMPLES*8];
void BSP_AUDIO_OUT_HalfTransfer_CallBack(void){
@ -212,20 +209,15 @@ static void sco_demo_sine_wave_int16_at_16000_hz_host_endian(unsigned int num_sa
}
}
static int buffer = 0;
static void generate_sine(void){
log_info("generate_sine %u", NUM_SINE_SAMPLES);
log_info("generate_sine %u", INPUT_BUFFER_NUM_SAMPLES);
if (recording_sample_rate == 8000){
sco_demo_sine_wave_int16_at_8000_hz_host_endian(NUM_SINE_SAMPLES, &input_buffer[buffer * NUM_SINE_SAMPLES]);
sco_demo_sine_wave_int16_at_8000_hz_host_endian(INPUT_BUFFER_NUM_SAMPLES, input_buffer);
} else {
sco_demo_sine_wave_int16_at_16000_hz_host_endian(NUM_SINE_SAMPLES, &input_buffer[buffer * NUM_SINE_SAMPLES]);
sco_demo_sine_wave_int16_at_16000_hz_host_endian(INPUT_BUFFER_NUM_SAMPLES, input_buffer);
}
// notify
(*audio_recorded_callback)(&input_buffer[buffer * NUM_SINE_SAMPLES], NUM_SINE_SAMPLES);
// swap buffer
buffer = 1 - buffer;
(*audio_recorded_callback)(input_buffer, INPUT_BUFFER_NUM_SAMPLES);
}
void BSP_AUDIO_IN_TransferComplete_CallBack(void){