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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <algorithm>
#include <limits>
#include <span>
#include "audio_core/adsp/apps/audio_renderer/command_list_processor.h"
#include "audio_core/renderer/command/mix/mix.h"
#include "common/fixed_point.h"
namespace AudioCore::Renderer {
/**
* 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 sample_count - Number of samples to process.
*/
template <size_t Q>
static void ApplyMix(std::span<s32> output, std::span<const s32> input, const f32 volume_,
const u32 sample_count) {
const Common::FixedPoint<64 - Q, Q> volume{volume_};
for (u32 i = 0; i < sample_count; i++) {
output[i] = (output[i] + input[i] * volume).to_int();
}
}
void MixCommand::Dump([[maybe_unused]] const AudioRenderer::CommandListProcessor& processor,
std::string& string) {
string += fmt::format("MixCommand");
string += fmt::format("\n\tinput {:02X}", input_index);
string += fmt::format("\n\toutput {:02X}", output_index);
string += fmt::format("\n\tvolume {:.8f}", volume);
string += "\n";
}
void MixCommand::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)};
// If volume is 0, nothing will be added to the output, so just skip.
if (volume == 0.0f) {
return;
}
switch (precision) {
case 15:
ApplyMix<15>(output, input, volume, processor.sample_count);
break;
case 23:
ApplyMix<23>(output, input, volume, processor.sample_count);
break;
default:
LOG_ERROR(Service_Audio, "Invalid precision {}", precision);
break;
}
}
bool MixCommand::Verify(const AudioRenderer::CommandListProcessor& processor) {
return true;
}
} // namespace AudioCore::Renderer
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