diff options
Diffstat (limited to 'src/audio_core/sink/sink_stream.cpp')
| -rw-r--r-- | src/audio_core/sink/sink_stream.cpp | 41 |
1 files changed, 24 insertions, 17 deletions
diff --git a/src/audio_core/sink/sink_stream.cpp b/src/audio_core/sink/sink_stream.cpp index 2a09db599..c047b0668 100644 --- a/src/audio_core/sink/sink_stream.cpp +++ b/src/audio_core/sink/sink_stream.cpp @@ -40,29 +40,36 @@ void SinkStream::AppendBuffer(SinkBuffer& buffer, std::span<s16> samples) { if (system_channels == 6 && device_channels == 2) { // We're given 6 channels, but our device only outputs 2, so downmix. - static constexpr std::array<f32, 4> down_mix_coeff{1.0f, 0.707f, 0.251f, 0.707f}; + // Front = 1.0 + // Center = 0.596 + // LFE = 0.354 + // Back = 0.707 + static constexpr std::array<f32, 4> down_mix_coeff{1.0, 0.596f, 0.354f, 0.707f}; for (u32 read_index = 0, write_index = 0; read_index < samples.size(); read_index += system_channels, write_index += device_channels) { + const auto fl = + static_cast<f32>(samples[read_index + static_cast<u32>(Channels::FrontLeft)]); + const auto fr = + static_cast<f32>(samples[read_index + static_cast<u32>(Channels::FrontRight)]); + const auto c = + static_cast<f32>(samples[read_index + static_cast<u32>(Channels::Center)]); + const auto lfe = + static_cast<f32>(samples[read_index + static_cast<u32>(Channels::LFE)]); + const auto bl = + static_cast<f32>(samples[read_index + static_cast<u32>(Channels::BackLeft)]); + const auto br = + static_cast<f32>(samples[read_index + static_cast<u32>(Channels::BackRight)]); + const auto left_sample{ - ((Common::FixedPoint<49, 15>( - samples[read_index + static_cast<u32>(Channels::FrontLeft)]) * - down_mix_coeff[0] + - samples[read_index + static_cast<u32>(Channels::Center)] * down_mix_coeff[1] + - samples[read_index + static_cast<u32>(Channels::LFE)] * down_mix_coeff[2] + - samples[read_index + static_cast<u32>(Channels::BackLeft)] * down_mix_coeff[3]) * - volume) - .to_int()}; + static_cast<s32>((fl * down_mix_coeff[0] + c * down_mix_coeff[1] + + lfe * down_mix_coeff[2] + bl * down_mix_coeff[3]) * + volume)}; const auto right_sample{ - ((Common::FixedPoint<49, 15>( - samples[read_index + static_cast<u32>(Channels::FrontRight)]) * - down_mix_coeff[0] + - samples[read_index + static_cast<u32>(Channels::Center)] * down_mix_coeff[1] + - samples[read_index + static_cast<u32>(Channels::LFE)] * down_mix_coeff[2] + - samples[read_index + static_cast<u32>(Channels::BackRight)] * down_mix_coeff[3]) * - volume) - .to_int()}; + static_cast<s32>((fr * down_mix_coeff[0] + c * down_mix_coeff[1] + + lfe * down_mix_coeff[2] + br * down_mix_coeff[3]) * + volume)}; samples[write_index + static_cast<u32>(Channels::FrontLeft)] = static_cast<s16>(std::clamp(left_sample, min, max)); |