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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "audio_core/adsp/apps/audio_renderer/command_list_processor.h"
#include "audio_core/renderer/command/mix/volume_ramp.h"
#include "common/fixed_point.h"
namespace AudioCore::Renderer {
/**
* 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 AudioRenderer::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 AudioRenderer::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 AudioRenderer::CommandListProcessor& processor) {
return true;
}
} // namespace AudioCore::Renderer
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