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stm32-f4discovery-cc256x: single PCM recording buffer
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@ -59,20 +59,17 @@ static uint32_t stream_samples;
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#endif
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// input
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#define INPUT_BUFFER_NUM_SAMPLES 512
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#define NUM_INPUT_BUFFERS 2
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#define INPUT_BUFFER_NUM_SAMPLES 256
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static int recording_started;
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static int32_t recording_sample_rate;
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static void (*audio_recorded_callback)(const int16_t * buffer, uint16_t num_samples);
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static int16_t input_buffer[NUM_INPUT_BUFFERS * INPUT_BUFFER_NUM_SAMPLES]; // mono
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static int16_t input_buffer[INPUT_BUFFER_NUM_SAMPLES]; // single mono buffer
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// 2048 16-bit samples decimation -> half/complete every 10 ms -> 160 audio samples
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static uint16_t pdm_buffer[2048];
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#define NUM_SINE_SAMPLES 160
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static uint16_t pdm_buffer[INPUT_BUFFER_NUM_SAMPLES*8];
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void BSP_AUDIO_OUT_HalfTransfer_CallBack(void){
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@ -212,20 +209,15 @@ static void sco_demo_sine_wave_int16_at_16000_hz_host_endian(unsigned int num_sa
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}
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}
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static int buffer = 0;
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static void generate_sine(void){
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log_info("generate_sine %u", NUM_SINE_SAMPLES);
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log_info("generate_sine %u", INPUT_BUFFER_NUM_SAMPLES);
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if (recording_sample_rate == 8000){
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sco_demo_sine_wave_int16_at_8000_hz_host_endian(NUM_SINE_SAMPLES, &input_buffer[buffer * NUM_SINE_SAMPLES]);
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sco_demo_sine_wave_int16_at_8000_hz_host_endian(INPUT_BUFFER_NUM_SAMPLES, input_buffer);
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} else {
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sco_demo_sine_wave_int16_at_16000_hz_host_endian(NUM_SINE_SAMPLES, &input_buffer[buffer * NUM_SINE_SAMPLES]);
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sco_demo_sine_wave_int16_at_16000_hz_host_endian(INPUT_BUFFER_NUM_SAMPLES, input_buffer);
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}
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// notify
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(*audio_recorded_callback)(&input_buffer[buffer * NUM_SINE_SAMPLES], NUM_SINE_SAMPLES);
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// swap buffer
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buffer = 1 - buffer;
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(*audio_recorded_callback)(input_buffer, INPUT_BUFFER_NUM_SAMPLES);
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}
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void BSP_AUDIO_IN_TransferComplete_CallBack(void){
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