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Change baseband floats to normalize at +/-1.0.

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Jared Boone
2016-02-14 12:38:50 -08:00
parent a5ed3b20b4
commit ef86848139
10 changed files with 35 additions and 26 deletions
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4
firmware/baseband/audio_output.cpp
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@@ -46,7 +46,7 @@ void AudioOutput::write(
) {
std::array<float, 32> audio_f;
for(size_t i=0; i<audio.count; i++) {
audio_f[i] = audio.p[i];
audio_f[i] = audio.p[i] * ki;
}
write(buffer_f32_t {
audio_f.data(),
@@ -89,7 +89,7 @@ void AudioOutput::on_block(
void AudioOutput::fill_audio_buffer(const buffer_f32_t& audio) {
auto audio_buffer = audio::dma::tx_empty_buffer();
for(size_t i=0; i<audio_buffer.count; i++) {
const int32_t sample_int = audio.p[i];
const int32_t sample_int = audio.p[i] * k;
const int32_t sample_saturated = __SSAT(sample_int, 16);
audio_buffer.p[i].left = audio_buffer.p[i].right = sample_saturated;
}