dolphin/Source/Core/Common/Src/WaveFile.cpp

121 lines
3.0 KiB
C++

// Copyright (C) 2003-2008 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include "Common.h"
#include "WaveFile.h"
enum {BUF_SIZE = 32*1024};
WaveFileWriter::WaveFileWriter()
{
conv_buffer = 0;
skip_silence = false;
}
WaveFileWriter::~WaveFileWriter()
{
delete [] conv_buffer;
Stop();
}
bool WaveFileWriter::Start(const char *filename)
{
if (!conv_buffer)
conv_buffer = new short[BUF_SIZE];
if (file)
return false;
file = fopen(filename, "wb");
if (!file)
return false;
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 = 32000;
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 (ftell(file) != 44)
PanicAlert("wrong offset: %i", ftell(file));
}
void WaveFileWriter::Stop()
{
if (!file)
return;
u32 file_size = (u32)ftell(file);
fseek(file, 4, SEEK_SET);
Write(audio_size + 36);
fseek(file, 40, SEEK_SET);
Write(audio_size);
fclose(file);
file = 0;
}
void WaveFileWriter::Write(u32 value)
{
fwrite(&value, 4, 1, file);
}
void WaveFileWriter::Write4(const char *ptr)
{
fwrite(ptr, 4, 1, file);
}
void WaveFileWriter::AddStereoSamples(const short *sample_data, int count)
{
if (!file)
PanicAlert("WaveFileWriter - file not open.");
if (skip_silence) {
bool all_zero = true;
for (int i = 0; i < count * 2; i++)
if (sample_data[i])
all_zero = false;
if (all_zero)
return;
}
fwrite(sample_data, count * 4, 1, file);
audio_size += count * 4;
}
void WaveFileWriter::AddStereoSamplesBE(const short *sample_data, int count)
{
if (!file)
PanicAlert("WaveFileWriter - file not open.");
if (count > BUF_SIZE * 2)
PanicAlert("WaveFileWriter - buffer too small (count = %i).", count);
if (skip_silence) {
bool all_zero = true;
for (int i = 0; i < count * 2; i++)
if (sample_data[i])
all_zero = false;
if (all_zero)
return;
}
for (int i = 0; i < count * 2; i++) {
conv_buffer[i] = Common::swap16((u16)sample_data[i]);
}
fwrite(conv_buffer, count * 4, 1, file);
audio_size += count * 4;
}