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// Copyright 2008 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "AudioCommon/WaveFile.h"
#include <string>
#include <fmt/format.h>
#include "AudioCommon/Mixer.h"
#include "Common/CommonTypes.h"
#include "Common/FileUtil.h"
#include "Common/IOFile.h"
#include "Common/Logging/Log.h"
#include "Common/MsgHandler.h"
#include "Common/StringUtil.h"
#include "Common/Swap.h"
#include "Core/Config/MainSettings.h"
constexpr size_t WaveFileWriter::BUFFER_SIZE;
WaveFileWriter::WaveFileWriter()
{
}
WaveFileWriter::~WaveFileWriter()
{
Stop();
}
bool WaveFileWriter::Start(const std::string& filename, u32 sample_rate_divisor)
{
// Ask to delete file
if (File::Exists(filename))
{
if (Config::Get(Config::MAIN_DUMP_AUDIO_SILENT) ||
AskYesNoFmtT("Delete the existing file '{0}'?", filename))
{
File::Delete(filename);
}
else
{
// Stop and cancel dumping the audio
return false;
}
}
// Check if the file is already open
if (m_file)
{
PanicAlertFmtT("The file {0} was already open, the file header will not be written.", filename);
return false;
}
m_file.Open(filename, "wb");
if (!m_file)
{
PanicAlertFmtT(
"The file {0} could not be opened for writing. Please check if it's already opened "
"by another program.",
filename);
return false;
}
m_audio_size = 0;
if (m_basename.empty())
SplitPath(filename, nullptr, &m_basename, nullptr);
m_current_sample_rate_divisor = sample_rate_divisor;
// -----------------
// Write file header
// -----------------
Write4("RIFF");
Write(100 * 1000 * 1000); // write big value in case the file gets truncated
Write4("WAVE");
Write4("fmt ");
Write(16); // size of fmt block
Write(0x00020001); // two channels, uncompressed
const u32 sample_rate = Mixer::FIXED_SAMPLE_RATE_DIVIDEND / sample_rate_divisor;
Write(sample_rate);
Write(sample_rate * 2 * 2); // two channels, 16bit
Write(0x00100004);
Write4("data");
Write(100 * 1000 * 1000 - 32);
// We are now at offset 44
if (m_file.Tell() != 44)
PanicAlertFmt("Wrong offset: {}", m_file.Tell());
return true;
}
void WaveFileWriter::Stop()
{
m_file.Seek(4, File::SeekOrigin::Begin);
Write(m_audio_size + 36);
m_file.Seek(40, File::SeekOrigin::Begin);
Write(m_audio_size);
m_file.Close();
}
void WaveFileWriter::Write(u32 value)
{
m_file.WriteArray(&value, 1);
}
void WaveFileWriter::Write4(const char* ptr)
{
m_file.WriteBytes(ptr, 4);
}
void WaveFileWriter::AddStereoSamplesBE(const short* sample_data, u32 count,
u32 sample_rate_divisor, int l_volume, int r_volume)
{
if (!m_file)
{
ERROR_LOG_FMT(AUDIO, "WaveFileWriter - file not open.");
return;
}
if (count * 2 > BUFFER_SIZE)
{
ERROR_LOG_FMT(AUDIO, "WaveFileWriter - buffer too small (count = {}).", count);
return;
}
if (m_skip_silence)
{
bool all_zero = true;
for (u32 i = 0; i < count * 2; i++)
{
if (sample_data[i])
all_zero = false;
}
if (all_zero)
return;
}
for (u32 i = 0; i < count; i++)
{
// Flip the audio channels from RL to LR
m_conv_buffer[2 * i] = Common::swap16((u16)sample_data[2 * i + 1]);
m_conv_buffer[2 * i + 1] = Common::swap16((u16)sample_data[2 * i]);
// Apply volume (volume ranges from 0 to 256)
m_conv_buffer[2 * i] = m_conv_buffer[2 * i] * l_volume / 256;
m_conv_buffer[2 * i + 1] = m_conv_buffer[2 * i + 1] * r_volume / 256;
}
if (sample_rate_divisor != m_current_sample_rate_divisor)
{
Stop();
m_file_index++;
const std::string filename =
fmt::format("{}{}{}.wav", File::GetUserPath(D_DUMPAUDIO_IDX), m_basename, m_file_index);
Start(filename, sample_rate_divisor);
m_current_sample_rate_divisor = sample_rate_divisor;
}
m_file.WriteBytes(m_conv_buffer.data(), count * 4);
m_audio_size += count * 4;
}
bool AudioCommon::LoadWavFile(const std::string& filename, std::vector<s16>* out_data,
u32* out_sample_rate, u16* out_channels)
{
File::IOFile file(filename, "rb");
if (!file)
return false;
char magic[4];
if (!file.ReadBytes(magic, 4) || strncmp(magic, "RIFF", 4) != 0)
return false;
file.Seek(4, File::SeekOrigin::Current);
if (!file.ReadBytes(magic, 4) || strncmp(magic, "WAVE", 4) != 0)
return false;
bool found_fmt = false;
bool found_data = false;
while (file.ReadBytes(magic, 4))
{
u32 chunk_size;
if (!file.ReadArray(&chunk_size, 1))
break;
if (strncmp(magic, "fmt ", 4) == 0)
{
u16 audio_format;
file.ReadArray(&audio_format, 1);
file.ReadArray(out_channels, 1);
file.ReadArray(out_sample_rate, 1);
file.Seek(6, File::SeekOrigin::Current);
u16 bits_per_sample;
file.ReadArray(&bits_per_sample, 1);
if (audio_format != 1 || bits_per_sample != 16)
return false;
if (chunk_size > 16)
file.Seek(chunk_size - 16, File::SeekOrigin::Current);
found_fmt = true;
}
else if (strncmp(magic, "data", 4) == 0)
{
out_data->resize(chunk_size / 2);
file.ReadArray(out_data->data(), out_data->size());
found_data = true;
if (chunk_size % 2 != 0)
file.Seek(1, File::SeekOrigin::Current);
}
else
{
file.Seek((chunk_size + 1) & ~1, File::SeekOrigin::Current);
}
}
return found_fmt && found_data;
}
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