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// 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/mix_ramp.h"
#include "common/fixed_point.h"
#include "common/logging/log.h"
namespace AudioCore::AudioRenderer {
/**
* Mix input mix buffer into output mix buffer, with volume applied to the input.
*
* @tparam Q - Number of bits for fixed point operations.
* @param output - Output mix buffer.
* @param input - Input mix buffer.
* @param volume - Volume applied to the input.
* @param ramp - Ramp applied to volume every sample.
* @param sample_count - Number of samples to process.
* @return The final gained input sample, used for depopping.
*/
template <size_t Q>
s32 ApplyMixRamp(std::span<s32> output, std::span<const s32> input, const f32 volume_,
const f32 ramp_, const u32 sample_count) {
Common::FixedPoint<64 - Q, Q> volume{volume_};
Common::FixedPoint<64 - Q, Q> sample{0};
if (ramp_ == 0.0f) {
for (u32 i = 0; i < sample_count; i++) {
sample = input[i] * volume;
output[i] = (output[i] + sample).to_int();
}
} else {
Common::FixedPoint<64 - Q, Q> ramp{ramp_};
for (u32 i = 0; i < sample_count; i++) {
sample = input[i] * volume;
output[i] = (output[i] + sample).to_int();
volume += ramp;
}
}
return sample.to_int();
}
template s32 ApplyMixRamp<15>(std::span<s32>, std::span<const s32>, const f32, const f32,
const u32);
template s32 ApplyMixRamp<23>(std::span<s32>, std::span<const s32>, const f32, const f32,
const u32);
void MixRampCommand::Dump(const ADSP::CommandListProcessor& processor, std::string& string) {
const auto ramp{(volume - prev_volume) / static_cast<f32>(processor.sample_count)};
string += fmt::format("MixRampCommand");
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 MixRampCommand::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)};
auto prev_sample_ptr{reinterpret_cast<s32*>(previous_sample)};
// If previous volume and ramp are both 0, nothing will be added to the output, so just skip.
if (prev_volume == 0.0f && ramp == 0.0f) {
*prev_sample_ptr = 0;
return;
}
switch (precision) {
case 15:
*prev_sample_ptr =
ApplyMixRamp<15>(output, input, prev_volume, ramp, processor.sample_count);
break;
case 23:
*prev_sample_ptr =
ApplyMixRamp<23>(output, input, prev_volume, ramp, processor.sample_count);
break;
default:
LOG_ERROR(Service_Audio, "Invalid precision {}", precision);
break;
}
}
bool MixRampCommand::Verify(const ADSP::CommandListProcessor& processor) {
return true;
}
} // namespace AudioCore::AudioRenderer
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