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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include <memory>
#include <vector>
#include <opus.h>
#include "common/common_funcs.h"
#include "common/logging/log.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/hle_ipc.h"
#include "core/hle/service/audio/hwopus.h"
namespace Service::Audio {
struct OpusDeleter {
void operator()(void* ptr) const {
operator delete(ptr);
}
};
class IHardwareOpusDecoderManager final : public ServiceFramework<IHardwareOpusDecoderManager> {
public:
IHardwareOpusDecoderManager(std::unique_ptr<OpusDecoder, OpusDeleter> decoder, u32 sample_rate,
u32 channel_count)
: ServiceFramework("IHardwareOpusDecoderManager"), decoder(std::move(decoder)),
sample_rate(sample_rate), channel_count(channel_count) {
static const FunctionInfo functions[] = {
{0, &IHardwareOpusDecoderManager::DecodeInterleaved, "DecodeInterleaved"},
{1, nullptr, "SetContext"},
{2, nullptr, "DecodeInterleavedForMultiStream"},
{3, nullptr, "SetContextForMultiStream"},
{4, nullptr, "Unknown4"},
{5, nullptr, "Unknown5"},
{6, nullptr, "Unknown6"},
{7, nullptr, "Unknown7"},
};
RegisterHandlers(functions);
}
private:
void DecodeInterleaved(Kernel::HLERequestContext& ctx) {
u32 consumed = 0;
u32 sample_count = 0;
std::vector<opus_int16> samples(ctx.GetWriteBufferSize() / sizeof(opus_int16));
if (!Decoder_DecodeInterleaved(consumed, sample_count, ctx.ReadBuffer(), samples)) {
IPC::ResponseBuilder rb{ctx, 2};
// TODO(ogniK): Use correct error code
rb.Push(ResultCode(-1));
return;
}
IPC::ResponseBuilder rb{ctx, 4};
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(consumed);
rb.Push<u32>(sample_count);
ctx.WriteBuffer(samples.data(), samples.size() * sizeof(s16));
}
bool Decoder_DecodeInterleaved(u32& consumed, u32& sample_count, const std::vector<u8>& input,
std::vector<opus_int16>& output) {
size_t raw_output_sz = output.size() * sizeof(opus_int16);
if (sizeof(OpusHeader) > input.size())
return false;
OpusHeader hdr{};
std::memcpy(&hdr, input.data(), sizeof(OpusHeader));
if (sizeof(OpusHeader) + static_cast<u32>(hdr.sz) > input.size()) {
return false;
}
auto frame = input.data() + sizeof(OpusHeader);
auto decoded_sample_count = opus_packet_get_nb_samples(
frame, static_cast<opus_int32>(input.size() - sizeof(OpusHeader)),
static_cast<opus_int32>(sample_rate));
if (decoded_sample_count * channel_count * sizeof(u16) > raw_output_sz)
return false;
auto out_sample_count =
opus_decode(decoder.get(), frame, hdr.sz, output.data(),
(static_cast<int>(raw_output_sz / sizeof(s16) / channel_count)), 0);
if (out_sample_count < 0)
return false;
sample_count = out_sample_count;
consumed = static_cast<u32>(sizeof(OpusHeader) + hdr.sz);
return true;
}
struct OpusHeader {
u32_be sz; // Needs to be BE for some odd reason
INSERT_PADDING_WORDS(1);
};
static_assert(sizeof(OpusHeader) == 0x8, "OpusHeader is an invalid size");
std::unique_ptr<OpusDecoder, OpusDeleter> decoder;
u32 sample_rate;
u32 channel_count;
};
static size_t WorkerBufferSize(u32 channel_count) {
ASSERT_MSG(channel_count == 1 || channel_count == 2, "Invalid channel count");
return opus_decoder_get_size(static_cast<int>(channel_count));
}
void HwOpus::GetWorkBufferSize(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
auto sample_rate = rp.Pop<u32>();
auto channel_count = rp.Pop<u32>();
ASSERT_MSG(sample_rate == 48000 || sample_rate == 24000 || sample_rate == 16000 ||
sample_rate == 12000 || sample_rate == 8000,
"Invalid sample rate");
ASSERT_MSG(channel_count == 1 || channel_count == 2, "Invalid channel count");
u32 worker_buffer_sz = static_cast<u32>(WorkerBufferSize(channel_count));
LOG_DEBUG(Audio, "called worker_buffer_sz={}", worker_buffer_sz);
IPC::ResponseBuilder rb{ctx, 3};
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(worker_buffer_sz);
}
void HwOpus::OpenOpusDecoder(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
auto sample_rate = rp.Pop<u32>();
auto channel_count = rp.Pop<u32>();
auto buffer_sz = rp.Pop<u32>();
LOG_DEBUG(Audio, "called sample_rate={}, channel_count={}, buffer_size={}", sample_rate,
channel_count, buffer_sz);
ASSERT_MSG(sample_rate == 48000 || sample_rate == 24000 || sample_rate == 16000 ||
sample_rate == 12000 || sample_rate == 8000,
"Invalid sample rate");
ASSERT_MSG(channel_count == 1 || channel_count == 2, "Invalid channel count");
size_t worker_sz = WorkerBufferSize(channel_count);
ASSERT_MSG(buffer_sz < worker_sz, "Worker buffer too large");
std::unique_ptr<OpusDecoder, OpusDeleter> decoder{
static_cast<OpusDecoder*>(operator new(worker_sz))};
if (opus_decoder_init(decoder.get(), sample_rate, channel_count)) {
IPC::ResponseBuilder rb{ctx, 2};
// TODO(ogniK): Use correct error code
rb.Push(ResultCode(-1));
return;
}
IPC::ResponseBuilder rb{ctx, 2, 0, 1};
rb.Push(RESULT_SUCCESS);
rb.PushIpcInterface<IHardwareOpusDecoderManager>(std::move(decoder), sample_rate,
channel_count);
}
HwOpus::HwOpus() : ServiceFramework("hwopus") {
static const FunctionInfo functions[] = {
{0, &HwOpus::OpenOpusDecoder, "OpenOpusDecoder"},
{1, &HwOpus::GetWorkBufferSize, "GetWorkBufferSize"},
{2, nullptr, "OpenOpusDecoderForMultiStream"},
{3, nullptr, "GetWorkBufferSizeForMultiStream"},
};
RegisterHandlers(functions);
}
HwOpus::~HwOpus() = default;
} // namespace Service::Audio
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