121 lines
3.0 KiB
C++
121 lines
3.0 KiB
C++
// Copyright (C) 2003-2008 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "Common.h"
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#include "WaveFile.h"
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enum {BUF_SIZE = 32*1024};
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WaveFileWriter::WaveFileWriter()
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{
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conv_buffer = 0;
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skip_silence = false;
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}
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WaveFileWriter::~WaveFileWriter()
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{
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delete [] conv_buffer;
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Stop();
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}
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bool WaveFileWriter::Start(const char *filename)
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{
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if (!conv_buffer)
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conv_buffer = new short[BUF_SIZE];
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if (file)
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return false;
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file = fopen(filename, "wb");
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if (!file)
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return false;
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Write4("RIFF");
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Write(100 * 1000 * 1000); // write big value in case the file gets truncated
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Write4("WAVE");
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Write4("fmt ");
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Write(16); // size of fmt block
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Write(0x00020001); //two channels, uncompressed
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const u32 sample_rate = 32000;
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Write(sample_rate);
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Write(sample_rate * 2 * 2); //two channels, 16bit
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Write(0x00100004);
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Write4("data");
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Write(100 * 1000 * 1000 - 32);
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// We are now at offset 44
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if (ftell(file) != 44)
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PanicAlert("wrong offset: %i", ftell(file));
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}
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void WaveFileWriter::Stop()
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{
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if (!file)
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return;
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u32 file_size = (u32)ftell(file);
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fseek(file, 4, SEEK_SET);
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Write(audio_size + 36);
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fseek(file, 40, SEEK_SET);
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Write(audio_size);
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fclose(file);
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file = 0;
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}
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void WaveFileWriter::Write(u32 value)
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{
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fwrite(&value, 4, 1, file);
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}
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void WaveFileWriter::Write4(const char *ptr)
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{
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fwrite(ptr, 4, 1, file);
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}
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void WaveFileWriter::AddStereoSamples(const short *sample_data, int count)
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{
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if (!file)
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PanicAlert("WaveFileWriter - file not open.");
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if (skip_silence) {
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bool all_zero = true;
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for (int i = 0; i < count * 2; i++)
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if (sample_data[i])
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all_zero = false;
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if (all_zero)
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return;
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}
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fwrite(sample_data, count * 4, 1, file);
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audio_size += count * 4;
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}
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void WaveFileWriter::AddStereoSamplesBE(const short *sample_data, int count)
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{
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if (!file)
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PanicAlert("WaveFileWriter - file not open.");
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if (count > BUF_SIZE * 2)
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PanicAlert("WaveFileWriter - buffer too small (count = %i).", count);
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if (skip_silence) {
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bool all_zero = true;
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for (int i = 0; i < count * 2; i++)
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if (sample_data[i])
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all_zero = false;
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if (all_zero)
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return;
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}
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for (int i = 0; i < count * 2; i++) {
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conv_buffer[i] = Common::swap16((u16)sample_data[i]);
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}
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fwrite(conv_buffer, count * 4, 1, file);
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audio_size += count * 4;
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} |