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[audio_core] Fix jamboree crash due to OOB access (#4252) 

Signed-off-by: lizzie <lizzie@eden-emu.dev>

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------

PLEASE test diablo 3 or ANY game that's sensitive to audio changes
Just TEST that there's NO regressions on the audio front

this fixes a rare Jamboree crash with audio DSP

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4252
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: Shinmegumi <shinmegumi@eden-emu.dev>
master
lizzie 19 hours ago
committed by crueter
parent
a0f1cd1baf
commit
a43664c0fd
No known key found for this signature in database GPG Key ID: 425ACD2D4830EBC6
2 changed files with 74 additions and 105 deletions
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  1. 150
      src/audio_core/renderer/command/data_source/decode.cpp
  2. 29
      src/audio_core/renderer/command/resample/resample.cpp

150
src/audio_core/renderer/command/data_source/decode.cpp
View File

@ -18,20 +18,15 @@
namespace AudioCore::Renderer {
constexpr u32 TempBufferSize = 0x3F00;
constexpr std::array<u8, 3> PitchBySrcQuality = {4, 8, 4};
/**
* Decode PCM data. Only s16 or f32 is supported.
*
* @tparam T - Type to decode. Only s16 and f32 are supported.
* @param memory - Core memory for reading samples.
* @param out_buffer - Output mix buffer to receive the samples.
* @param req - Information for how to decode.
* @return Number of samples decoded.
*/
/// @brief Decode PCM data. Only s16 or f32 is supported.
/// @tparam T - Type to decode. Only s16 and f32 are supported.
/// @param memory - Core memory for reading samples.
/// @param out_buffer - Output mix buffer to receive the samples.
/// @param req - Information for how to decode.
/// @return Number of samples decoded.
template <typename T>
static u32 DecodePcm(Core::Memory::Memory& memory, std::span<s16> out_buffer,
const DecodeArg& req) {
static u32 DecodePcm(Core::Memory::Memory& memory, std::span<s16> out_buffer, const DecodeArg& req) {
constexpr s32 min{(std::numeric_limits<s16>::min)()};
constexpr s32 max{(std::numeric_limits<s16>::max)()};
@ -94,16 +89,12 @@ static u32 DecodePcm(Core::Memory::Memory& memory, std::span<s16> out_buffer,
return samples_to_decode;
}
/**
* Decode ADPCM data.
*
* @param memory - Core memory for reading samples.
* @param out_buffer - Output mix buffer to receive the samples.
* @param req - Information for how to decode.
* @return Number of samples decoded.
*/
static u32 DecodeAdpcm(Core::Memory::Memory& memory, std::span<s16> out_buffer,
const DecodeArg& req) {
/// @brief Decode ADPCM data.
/// @param memory - Core memory for reading samples.
/// @param out_buffer - Output mix buffer to receive the samples.
/// @param req - Information for how to decode.
/// @return Number of samples decoded.
static u32 DecodeAdpcm(Core::Memory::Memory& memory, std::span<s16> out_buffer, const DecodeArg& req) {
constexpr u32 SamplesPerFrame{14};
constexpr u32 NibblesPerFrame{16};
@ -115,8 +106,7 @@ static u32 DecodeAdpcm(Core::Memory::Memory& memory, std::span<s16> out_buffer,
return 0;
}
auto end{(req.end_offset % SamplesPerFrame) +
NibblesPerFrame * (req.end_offset / SamplesPerFrame)};
auto end{(req.end_offset % SamplesPerFrame) + NibblesPerFrame * (req.end_offset / SamplesPerFrame)};
if (req.end_offset % SamplesPerFrame) {
end += 3;
} else {
@ -133,52 +123,49 @@ static u32 DecodeAdpcm(Core::Memory::Memory& memory, std::span<s16> out_buffer,
return 0;
}
auto samples_to_read{samples_to_process};
auto samples_remaining_in_frame{start_pos % SamplesPerFrame};
auto position_in_frame{(start_pos / SamplesPerFrame) * NibblesPerFrame +
samples_remaining_in_frame};
auto samples_to_read = samples_to_process;
auto samples_remaining_in_frame = start_pos % SamplesPerFrame;
auto position_in_frame = (start_pos / SamplesPerFrame) * NibblesPerFrame + samples_remaining_in_frame;
if (samples_remaining_in_frame) {
position_in_frame += 2;
}
const auto size{(std::max)((samples_to_process / 8U) * SamplesPerFrame, 8U)};
Core::Memory::CpuGuestMemory<u8, Core::Memory::GuestMemoryFlags::UnsafeRead> wavebuffer(
memory, req.buffer + position_in_frame / 2, size);
auto context{req.adpcm_context};
auto header{context->header};
u8 coeff_index{static_cast<u8>((header >> 4U) & 0xFU)};
u8 scale{static_cast<u8>(header & 0xFU)};
s32 coeff0{req.coefficients[coeff_index * 2 + 0]};
s32 coeff1{req.coefficients[coeff_index * 2 + 1]};
auto yn0{context->yn0};
auto yn1{context->yn1};
static constexpr std::array<s32, 16> Steps{
0, 1, 2, 3, 4, 5, 6, 7, -8, -7, -6, -5, -4, -3, -2, -1,
Core::Memory::CpuGuestMemory<u8, Core::Memory::GuestMemoryFlags::UnsafeRead> wavebuffer(memory, req.buffer + position_in_frame / 2, size);
auto context = req.adpcm_context;
auto header = context->header;
u8 scale = u8(header & 0xfU);
u8 coeff_index = u8((header >> 4U) & 0x7u);
s32 coeff0 = req.coefficients[coeff_index * 2 + 0];
s32 coeff1 = req.coefficients[coeff_index * 2 + 1];
auto yn0 = context->yn0;
auto yn1 = context->yn1;
auto const get_step = [](u32 index) {
// Emulates the following table
// 0, 1, 2, 3, 4, 5, 6, 7, -8, -7, -6, -5, -4, -3, -2, -1,
constexpr u64 steps_table = 0x1234567876543210ull;
constexpr u64 steps_sign = 0b1111111100000000ull;
auto const r = s32((steps_table >> (index * 4)) & 0xf);
return ((steps_sign >> index) & 1) == 0 ? -r : r;
};
const auto decode_sample = [&](const s32 code) -> s16 {
auto const decode_sample = [&](const s32 code) -> s16 {
const auto xn = code * (1 << scale);
const auto prediction = coeff0 * yn0 + coeff1 * yn1;
const auto sample = ((xn << 11) + 0x400 + prediction) >> 11;
const auto saturated = std::clamp<s32>(sample, -0x8000, 0x7FFF);
yn1 = yn0;
yn0 = static_cast<s16>(saturated);
return yn0;
return yn0 = s16(saturated);
};
u32 read_index{0};
u32 write_index{0};
while (samples_to_read > 0) {
u32 read_index = 0;
for (u32 write_index = 0; samples_to_read > 0 && write_index < out_buffer.size(); ) {
// Are we at a new frame?
if ((position_in_frame % NibblesPerFrame) == 0) {
header = wavebuffer[read_index++];
coeff_index = (header >> 4) & 0xF;
scale = header & 0xF;
scale = header & 0xFu;
coeff_index = (header >> 4) & 0x7u;
coeff0 = req.coefficients[coeff_index * 2 + 0];
coeff1 = req.coefficients[coeff_index * 2 + 1];
position_in_frame += 2;
@ -187,14 +174,12 @@ static u32 DecodeAdpcm(Core::Memory::Memory& memory, std::span<s16> out_buffer,
if (samples_to_read >= SamplesPerFrame) {
// Can grab all samples until the next header
for (u32 i = 0; i < SamplesPerFrame / 2; i++) {
auto code0{Steps[(wavebuffer[read_index] >> 4) & 0xF]};
auto code1{Steps[wavebuffer[read_index] & 0xF]};
read_index++;
auto code0 = get_step((wavebuffer[read_index + i] >> 4) & 0xF);
auto code1 = get_step(wavebuffer[read_index + i] & 0xF);
out_buffer[write_index++] = decode_sample(code0);
out_buffer[write_index++] = decode_sample(code1);
}
read_index += SamplesPerFrame / 2;
position_in_frame += SamplesPerFrame;
samples_to_read -= SamplesPerFrame;
continue;
@ -202,15 +187,14 @@ static u32 DecodeAdpcm(Core::Memory::Memory& memory, std::span<s16> out_buffer,
}
// Decode a single sample
auto code{wavebuffer[read_index]};
auto code = wavebuffer[read_index];
if (position_in_frame & 1) {
code &= 0xF;
read_index++;
} else {
code >>= 4;
}
out_buffer[write_index++] = decode_sample(Steps[code]);
out_buffer[write_index++] = decode_sample(get_step(code));
position_in_frame++;
samples_to_read--;
@ -219,27 +203,21 @@ static u32 DecodeAdpcm(Core::Memory::Memory& memory, std::span<s16> out_buffer,
context->header = header;
context->yn0 = yn0;
context->yn1 = yn1;
return samples_to_process;
}
/**
* Decode implementation.
* Decode wavebuffers according to the given args.
*
* @param memory - Core memory to read data from.
* @param args - The wavebuffer data, and information for how to decode it.
*/
/// @brief Decode implementation.
/// Decode wavebuffers according to the given args.
///
/// @param memory - Core memory to read data from.
/// @param args - The wavebuffer data, and information for how to decode it.
void DecodeFromWaveBuffers(Core::Memory::Memory& memory, const DecodeFromWaveBuffersArgs& args) {
static constexpr auto EndWaveBuffer = [](auto& voice_state, auto& wavebuffer, auto& index,
auto& played_samples, auto& consumed) -> void {
constexpr auto EndWaveBuffer = [](auto& voice_state, auto& wavebuffer, auto& index, auto& played_samples, auto& consumed) -> void {
voice_state.wave_buffer_valid[index] = false;
voice_state.loop_count = 0;
if (wavebuffer.stream_ended) {
played_samples = 0;
}
index = (index + 1) % MaxWaveBuffers;
consumed++;
};
@ -255,8 +233,9 @@ void DecodeFromWaveBuffers(Core::Memory::Memory& memory, const DecodeFromWaveBuf
return;
}
auto pitch{PitchBySrcQuality[static_cast<u32>(args.src_quality)]};
if (static_cast<u32>(pitch + size_required.to_int_floor()) > TempBufferSize) {
// 0 -> 4, 1 -> 8, 2 -> 4
auto pitch = u32((0x040804ul >> (u32(args.src_quality) * 8)) & 0xfful);
if (u32(pitch + size_required.to_int_floor()) > TempBufferSize) {
return;
}
@ -272,7 +251,7 @@ void DecodeFromWaveBuffers(Core::Memory::Memory& memory, const DecodeFromWaveBuf
bool is_buffer_starved{false};
u32 offset{voice_state.offset};
auto output_buffer{args.output};
auto output_buffer = args.output;
std::array<s16, TempBufferSize> temp_buffer{};
while (remaining_sample_count > 0) {
@ -294,8 +273,8 @@ void DecodeFromWaveBuffers(Core::Memory::Memory& memory, const DecodeFromWaveBuf
if (wavebuffer_index >= MaxWaveBuffers) {
LOG_ERROR(Service_Audio, "Invalid wavebuffer index! {}", wavebuffer_index);
wavebuffer_index = 0;
voice_state.wave_buffer_valid.fill(false);
wavebuffers_consumed = MaxWaveBuffers;
voice_state.wave_buffer_valid.fill(false);
}
if (!voice_state.wave_buffer_valid[wavebuffer_index]) {
@ -303,12 +282,9 @@ void DecodeFromWaveBuffers(Core::Memory::Memory& memory, const DecodeFromWaveBuf
break;
}
auto& wavebuffer{args.wave_buffers[wavebuffer_index]};
if (offset == 0 && args.sample_format == SampleFormat::Adpcm &&
wavebuffer.context != 0) {
memory.ReadBlockUnsafe(wavebuffer.context, &voice_state.adpcm_context,
wavebuffer.context_size);
auto& wavebuffer = args.wave_buffers[wavebuffer_index];
if (offset == 0 && args.sample_format == SampleFormat::Adpcm && wavebuffer.context != 0) {
memory.ReadBlockUnsafe(wavebuffer.context, &voice_state.adpcm_context, wavebuffer.context_size);
}
auto start_offset{wavebuffer.start_offset};
@ -351,9 +327,7 @@ void DecodeFromWaveBuffers(Core::Memory::Memory& memory, const DecodeFromWaveBuf
case SampleFormat::Adpcm: {
decode_arg.adpcm_context = &voice_state.adpcm_context;
memory.ReadBlockUnsafe(args.data_address, &decode_arg.coefficients, args.data_size);
samples_decoded = DecodeAdpcm(
memory, {&temp_buffer[temp_buffer_pos], TempBufferSize - temp_buffer_pos},
decode_arg);
samples_decoded = DecodeAdpcm( memory, {&temp_buffer[temp_buffer_pos], TempBufferSize - temp_buffer_pos}, decode_arg);
} break;
default:

29
src/audio_core/renderer/command/resample/resample.cpp
View File

@ -1,3 +1,6 @@
// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
@ -5,21 +8,13 @@
namespace AudioCore::Renderer {
static void ResampleLowQuality(std::span<s32> output, std::span<const s16> input,
const Common::FixedPoint<49, 15>& sample_rate_ratio,
Common::FixedPoint<49, 15>& fraction, const u32 samples_to_write) {
if (sample_rate_ratio == 1.0f) {
for (u32 i = 0; i < samples_to_write; i++) {
output[i] = input[i];
}
} else {
u32 read_index{0};
for (u32 i = 0; i < samples_to_write; i++) {
output[i] = input[read_index + (fraction >= 0.5f)];
fraction += sample_rate_ratio;
read_index += static_cast<u32>(fraction.to_int_floor());
fraction.clear_int();
}
static void ResampleLowQuality(std::span<s32> output, std::span<const s16> input, const Common::FixedPoint<49, 15>& sample_rate_ratio, Common::FixedPoint<49, 15>& fraction, const u32 samples_to_write) {
u32 read_index{0};
for (u32 i = 0; i < samples_to_write; i++) {
output[i] = input[read_index + (fraction >= 0.5f)];
fraction += sample_rate_ratio;
read_index += u32(fraction.to_int_floor());
fraction.clear_int();
}
}
@ -295,7 +290,7 @@ static void ResampleNormalQuality(std::span<s32> output, std::span<const s16> in
auto lut{get_lut()};
u32 read_index{0};
for (u32 i = 0; i < samples_to_write; i++) {
const auto lut_index{(fraction.get_frac() >> 8) * 4};
const auto lut_index = ((fraction.get_frac() >> 8) << 2) & 511;
const Common::FixedPoint<56, 8> sample0{input[read_index + 0] * lut[lut_index + 0]};
const Common::FixedPoint<56, 8> sample1{input[read_index + 1] * lut[lut_index + 1]};
const Common::FixedPoint<56, 8> sample2{input[read_index + 2] * lut[lut_index + 2]};
@ -845,7 +840,7 @@ static void ResampleHighQuality(std::span<s32> output, std::span<const s16> inpu
auto lut{get_lut()};
u32 read_index{0};
for (u32 i = 0; i < samples_to_write; i++) {
const auto lut_index{(fraction.get_frac() >> 8) * 8};
const auto lut_index = ((fraction.get_frac() >> 8) << 3) & 1023;
const Common::FixedPoint<56, 8> sample0{input[read_index + 0] * lut[lut_index + 0]};
const Common::FixedPoint<56, 8> sample1{input[read_index + 1] * lut[lut_index + 1]};
const Common::FixedPoint<56, 8> sample2{input[read_index + 2] * lut[lut_index + 2]};

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