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decoder.cpp
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decoder.cpp
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// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "audio_core/opus/decoder.h"
#include "audio_core/opus/hardware_opus.h"
#include "audio_core/opus/parameters.h"
#include "common/alignment.h"
#include "common/swap.h"
#include "core/core.h"
namespace AudioCore::OpusDecoder {
using namespace Service::Audio;
namespace {
OpusPacketHeader ReverseHeader(OpusPacketHeader header) {
OpusPacketHeader out;
out.size = Common::swap32(header.size);
out.final_range = Common::swap32(header.final_range);
return out;
}
} // namespace
OpusDecoder::OpusDecoder(Core::System& system_, HardwareOpus& hardware_opus_)
: system{system_}, hardware_opus{hardware_opus_} {}
OpusDecoder::~OpusDecoder() {
if (decode_object_initialized) {
hardware_opus.ShutdownDecodeObject(shared_buffer.get(), shared_buffer_size);
}
}
Result OpusDecoder::Initialize(const OpusParametersEx& params,
Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size) {
auto frame_size{params.use_large_frame_size ? 5760 : 1920};
shared_buffer_size = transfer_memory_size;
shared_buffer = std::make_unique<u8[]>(shared_buffer_size);
shared_memory_mapped = true;
buffer_size =
Common::AlignUp((frame_size * params.channel_count) / (48'000 / params.sample_rate), 16);
out_data = {shared_buffer.get() + shared_buffer_size - buffer_size, buffer_size};
size_t in_data_size{0x600u};
in_data = {out_data.data() - in_data_size, in_data_size};
ON_RESULT_FAILURE {
if (shared_memory_mapped) {
shared_memory_mapped = false;
ASSERT(R_SUCCEEDED(hardware_opus.UnmapMemory(shared_buffer.get(), shared_buffer_size)));
}
};
R_TRY(hardware_opus.InitializeDecodeObject(params.sample_rate, params.channel_count,
shared_buffer.get(), shared_buffer_size));
sample_rate = params.sample_rate;
channel_count = params.channel_count;
use_large_frame_size = params.use_large_frame_size;
decode_object_initialized = true;
R_SUCCEED();
}
Result OpusDecoder::Initialize(const OpusMultiStreamParametersEx& params,
Kernel::KTransferMemory* transfer_memory, u64 transfer_memory_size) {
auto frame_size{params.use_large_frame_size ? 5760 : 1920};
shared_buffer_size = transfer_memory_size;
shared_buffer = std::make_unique<u8[]>(shared_buffer_size);
shared_memory_mapped = true;
buffer_size =
Common::AlignUp((frame_size * params.channel_count) / (48'000 / params.sample_rate), 16);
out_data = {shared_buffer.get() + shared_buffer_size - buffer_size, buffer_size};
size_t in_data_size{Common::AlignUp(1500ull * params.total_stream_count, 64u)};
in_data = {out_data.data() - in_data_size, in_data_size};
ON_RESULT_FAILURE {
if (shared_memory_mapped) {
shared_memory_mapped = false;
ASSERT(R_SUCCEEDED(hardware_opus.UnmapMemory(shared_buffer.get(), shared_buffer_size)));
}
};
R_TRY(hardware_opus.InitializeMultiStreamDecodeObject(
params.sample_rate, params.channel_count, params.total_stream_count,
params.stereo_stream_count, params.mappings.data(), shared_buffer.get(),
shared_buffer_size));
sample_rate = params.sample_rate;
channel_count = params.channel_count;
total_stream_count = params.total_stream_count;
stereo_stream_count = params.stereo_stream_count;
use_large_frame_size = params.use_large_frame_size;
decode_object_initialized = true;
R_SUCCEED();
}
Result OpusDecoder::DecodeInterleaved(u32* out_data_size, u64* out_time_taken,
u32* out_sample_count, std::span<const u8> input_data,
std::span<u8> output_data, bool reset) {
u32 out_samples;
u64 time_taken{};
R_UNLESS(input_data.size_bytes() > sizeof(OpusPacketHeader), ResultInputDataTooSmall);
auto* header_p{reinterpret_cast<const OpusPacketHeader*>(input_data.data())};
OpusPacketHeader header{ReverseHeader(*header_p)};
R_UNLESS(in_data.size_bytes() >= header.size &&
header.size + sizeof(OpusPacketHeader) <= input_data.size_bytes(),
ResultBufferTooSmall);
if (!shared_memory_mapped) {
R_TRY(hardware_opus.MapMemory(shared_buffer.get(), shared_buffer_size));
shared_memory_mapped = true;
}
std::memcpy(in_data.data(), input_data.data() + sizeof(OpusPacketHeader), header.size);
R_TRY(hardware_opus.DecodeInterleaved(out_samples, out_data.data(), out_data.size_bytes(),
channel_count, in_data.data(), header.size,
shared_buffer.get(), time_taken, reset));
std::memcpy(output_data.data(), out_data.data(), out_samples * channel_count * sizeof(s16));
*out_data_size = header.size + sizeof(OpusPacketHeader);
*out_sample_count = out_samples;
if (out_time_taken) {
*out_time_taken = time_taken / 1000;
}
R_SUCCEED();
}
Result OpusDecoder::SetContext([[maybe_unused]] std::span<const u8> context) {
R_SUCCEED_IF(shared_memory_mapped);
shared_memory_mapped = true;
R_RETURN(hardware_opus.MapMemory(shared_buffer.get(), shared_buffer_size));
}
Result OpusDecoder::DecodeInterleavedForMultiStream(u32* out_data_size, u64* out_time_taken,
u32* out_sample_count,
std::span<const u8> input_data,
std::span<u8> output_data, bool reset) {
u32 out_samples;
u64 time_taken{};
R_UNLESS(input_data.size_bytes() > sizeof(OpusPacketHeader), ResultInputDataTooSmall);
auto* header_p{reinterpret_cast<const OpusPacketHeader*>(input_data.data())};
OpusPacketHeader header{ReverseHeader(*header_p)};
LOG_TRACE(Service_Audio, "header size 0x{:X} input data size 0x{:X} in_data size 0x{:X}",
header.size, input_data.size_bytes(), in_data.size_bytes());
R_UNLESS(in_data.size_bytes() >= header.size &&
header.size + sizeof(OpusPacketHeader) <= input_data.size_bytes(),
ResultBufferTooSmall);
if (!shared_memory_mapped) {
R_TRY(hardware_opus.MapMemory(shared_buffer.get(), shared_buffer_size));
shared_memory_mapped = true;
}
std::memcpy(in_data.data(), input_data.data() + sizeof(OpusPacketHeader), header.size);
R_TRY(hardware_opus.DecodeInterleavedForMultiStream(
out_samples, out_data.data(), out_data.size_bytes(), channel_count, in_data.data(),
header.size, shared_buffer.get(), time_taken, reset));
std::memcpy(output_data.data(), out_data.data(), out_samples * channel_count * sizeof(s16));
*out_data_size = header.size + sizeof(OpusPacketHeader);
*out_sample_count = out_samples;
if (out_time_taken) {
*out_time_taken = time_taken / 1000;
}
R_SUCCEED();
}
} // namespace AudioCore::OpusDecoder