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Parametric mic gain inside codec2 module

This commit is contained in:
Silvano Seva 2022-04-02 10:16:32 +02:00
parent b144657257
commit 49e5486ea6
1 changed files with 11 additions and 3 deletions
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14
openrtx/src/core/audio_codec.c
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@ -44,6 +44,14 @@ static uint8_t writePos;
static uint8_t numElements;
static uint64_t dataBuffer[BUF_SIZE];
#ifdef PLATFORM_MOD17
static const uint8_t micGainPre = 4;
static const uint8_t micGainPost = 6;
#else
static const uint8_t micGainPre = 8;
static const uint8_t micGainPost = 4;
#endif
static void *encodeFunc(void *arg);
static void *decodeFunc(void *arg);
static void startThread(void *(*func) (void *));
@ -174,15 +182,15 @@ static void *encodeFunc(void *arg)
if(audio.data != NULL)
{
#if defined(PLATFORM_MD3x0) || defined(PLATFORM_MDUV3x0)
#ifndef PLATFORM_LINUX
// Pre-amplification stage
for(size_t i = 0; i < audio.len; i++) audio.data[i] <<= 3;
for(size_t i = 0; i < audio.len; i++) audio.data[i] *= micGainPre;
// DC removal
dsp_dcRemoval(audio.data, audio.len);
// Post-amplification stage
for(size_t i = 0; i < audio.len; i++) audio.data[i] *= 4;
for(size_t i = 0; i < audio.len; i++) audio.data[i] *= micGainPost;
#endif
// CODEC2 encodes 160ms of speech into 8 bytes: here we write the