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Optimize audio_4_channel_mic waveform data.

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This commit is contained in:
HiFiPhile 2024-04-09 23:11:43 +02:00
parent 5f4d6ae20c
commit 0d4465a098
1 changed files with 10 additions and 10 deletions
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20
examples/device/audio_4_channel_mic/src/main.c
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@ -104,39 +104,39 @@ int main(void)
// Generate dummy data // Generate dummy data
#if CFG_TUD_AUDIO_ENABLE_ENCODING #if CFG_TUD_AUDIO_ENABLE_ENCODING
uint16_t * p_buff = i2s_dummy_buffer[0]; uint16_t * p_buff = i2s_dummy_buffer[0];
uint16_t dataVal = 1; uint16_t dataVal = 0;
for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++) for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++)
{ {
// CH0 saw wave // CH0 saw wave
*p_buff++ = dataVal; *p_buff++ = dataVal;
// CH1 inverted saw wave // CH1 inverted saw wave
*p_buff++ = 60 + AUDIO_SAMPLE_RATE/1000 - dataVal; *p_buff++ = 3200 + AUDIO_SAMPLE_RATE/1000 - dataVal;
dataVal++; dataVal+= 32;
} }
p_buff = i2s_dummy_buffer[1]; p_buff = i2s_dummy_buffer[1];
for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++) for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++)
{ {
// CH3 square wave // CH3 square wave
*p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 120:170; *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 3400:5000;
// CH4 sinus wave // CH4 sinus wave
float t = 2*3.1415f * cnt / (AUDIO_SAMPLE_RATE/1000); float t = 2*3.1415f * cnt / (AUDIO_SAMPLE_RATE/1000);
*p_buff++ = (uint16_t)(sinf(t) * 25) + 200; *p_buff++ = (uint16_t)((int16_t)(sinf(t) * 750) + 6000);
} }
#else #else
uint16_t * p_buff = i2s_dummy_buffer; uint16_t * p_buff = i2s_dummy_buffer;
uint16_t dataVal = 1; uint16_t dataVal = 0;
for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++) for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++)
{ {
// CH0 saw wave // CH0 saw wave
*p_buff++ = dataVal; *p_buff++ = dataVal;
// CH1 inverted saw wave // CH1 inverted saw wave
*p_buff++ = 60 + AUDIO_SAMPLE_RATE/1000 - dataVal; *p_buff++ = 3200 + AUDIO_SAMPLE_RATE/1000 - dataVal;
dataVal++; dataVal+= 32;
// CH3 square wave // CH3 square wave
*p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 120:170; *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 3400:5000;
// CH4 sinus wave // CH4 sinus wave
float t = 2*3.1415f * cnt / (AUDIO_SAMPLE_RATE/1000); float t = 2*3.1415f * cnt / (AUDIO_SAMPLE_RATE/1000);
*p_buff++ = (uint16_t)(sinf(t) * 25) + 200; *p_buff++ = (uint16_t)((int16_t)(sinf(t) * 750) + 6000);
} }
#endif #endif