diff options
Diffstat (limited to 'src/audio_core/renderer/command/mix/volume_ramp.cpp')
-rw-r--r-- | src/audio_core/renderer/command/mix/volume_ramp.cpp | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/audio_core/renderer/command/mix/volume_ramp.cpp b/src/audio_core/renderer/command/mix/volume_ramp.cpp new file mode 100644 index 000000000..424307148 --- /dev/null +++ b/src/audio_core/renderer/command/mix/volume_ramp.cpp @@ -0,0 +1,84 @@ +// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "audio_core/renderer/adsp/command_list_processor.h" +#include "audio_core/renderer/command/mix/volume_ramp.h" +#include "common/fixed_point.h" + +namespace AudioCore::AudioRenderer { +/** + * Apply volume with ramping to the input mix buffer, saving to the output buffer. + * + * @tparam Q - Number of bits for fixed point operations. + * @param output - Output mix buffers. + * @param input - Input mix buffers. + * @param volume - Volume applied to the input. + * @param ramp - Ramp applied to volume every sample. + * @param sample_count - Number of samples to process. + */ +template <size_t Q> +static void ApplyLinearEnvelopeGain(std::span<s32> output, std::span<const s32> input, + const f32 volume, const f32 ramp_, const u32 sample_count) { + if (volume == 0.0f && ramp_ == 0.0f) { + std::memset(output.data(), 0, output.size_bytes()); + } else if (volume == 1.0f && ramp_ == 0.0f) { + std::memcpy(output.data(), input.data(), output.size_bytes()); + } else if (ramp_ == 0.0f) { + const Common::FixedPoint<64 - Q, Q> gain{volume}; + for (u32 i = 0; i < sample_count; i++) { + output[i] = (input[i] * gain).to_int(); + } + } else { + Common::FixedPoint<64 - Q, Q> gain{volume}; + const Common::FixedPoint<64 - Q, Q> ramp{ramp_}; + for (u32 i = 0; i < sample_count; i++) { + output[i] = (input[i] * gain).to_int(); + gain += ramp; + } + } +} + +void VolumeRampCommand::Dump(const ADSP::CommandListProcessor& processor, std::string& string) { + const auto ramp{(volume - prev_volume) / static_cast<f32>(processor.sample_count)}; + string += fmt::format("VolumeRampCommand"); + string += fmt::format("\n\tinput {:02X}", input_index); + string += fmt::format("\n\toutput {:02X}", output_index); + string += fmt::format("\n\tvolume {:.8f}", volume); + string += fmt::format("\n\tprev_volume {:.8f}", prev_volume); + string += fmt::format("\n\tramp {:.8f}", ramp); + string += "\n"; +} + +void VolumeRampCommand::Process(const ADSP::CommandListProcessor& processor) { + auto output{processor.mix_buffers.subspan(output_index * processor.sample_count, + processor.sample_count)}; + auto input{processor.mix_buffers.subspan(input_index * processor.sample_count, + processor.sample_count)}; + const auto ramp{(volume - prev_volume) / static_cast<f32>(processor.sample_count)}; + + // If input and output buffers are the same, and the volume is 1.0f, and there's no ramping, + // this won't do anything, so just skip. + if (input_index == output_index && prev_volume == 1.0f && ramp == 0.0f) { + return; + } + + switch (precision) { + case 15: + ApplyLinearEnvelopeGain<15>(output, input, prev_volume, ramp, processor.sample_count); + break; + + case 23: + ApplyLinearEnvelopeGain<23>(output, input, prev_volume, ramp, processor.sample_count); + break; + + default: + LOG_ERROR(Service_Audio, "Invalid precision {}", precision); + break; + } +} + +bool VolumeRampCommand::Verify(const ADSP::CommandListProcessor& processor) { + return true; +} + +} // namespace AudioCore::AudioRenderer |