mirror of
https://github.com/libretro/pcsx2.git
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130 lines
3.4 KiB
C++
130 lines
3.4 KiB
C++
/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2022 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "common/PrecompiledHeader.h"
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#include "common/WAVWriter.h"
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#include "common/FileSystem.h"
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#include "common/Console.h"
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#pragma pack(push, 1)
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struct WAV_HEADER
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{
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u32 chunk_id; // RIFF
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u32 chunk_size;
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u32 format; // WAVE
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struct FormatChunk
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{
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u32 chunk_id; // "fmt "
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u32 chunk_size;
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u16 audio_format; // pcm = 1
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u16 num_channels;
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u32 sample_rate;
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u32 byte_rate;
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u16 block_align;
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u16 bits_per_sample;
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} fmt_chunk;
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struct DataChunkHeader
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{
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u32 chunk_id; // "data "
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u32 chunk_size;
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} data_chunk_header;
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};
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#pragma pack(pop)
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using namespace Common;
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WAVWriter::WAVWriter() = default;
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WAVWriter::~WAVWriter()
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{
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if (IsOpen())
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Close();
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}
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bool WAVWriter::Open(const char* filename, u32 sample_rate, u32 num_channels)
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{
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if (IsOpen())
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Close();
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m_file = FileSystem::OpenCFile(filename, "wb");
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if (!m_file)
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return false;
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m_sample_rate = sample_rate;
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m_num_channels = num_channels;
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if (!WriteHeader())
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{
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Console.Error("Failed to write header to file");
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m_sample_rate = 0;
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m_num_channels = 0;
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std::fclose(m_file);
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m_file = nullptr;
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return false;
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}
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return true;
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}
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void WAVWriter::Close()
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{
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if (!IsOpen())
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return;
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if (std::fseek(m_file, 0, SEEK_SET) != 0 || !WriteHeader())
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Console.Error("Failed to re-write header on file, file may be unplayable");
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std::fclose(m_file);
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m_file = nullptr;
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m_sample_rate = 0;
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m_num_channels = 0;
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m_num_frames = 0;
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}
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void WAVWriter::WriteFrames(const s16* samples, u32 num_frames)
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{
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const u32 num_frames_written =
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static_cast<u32>(std::fwrite(samples, sizeof(s16) * m_num_channels, num_frames, m_file));
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if (num_frames_written != num_frames)
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Console.Error("Only wrote %u of %u frames to output file", num_frames_written, num_frames);
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m_num_frames += num_frames_written;
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}
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bool WAVWriter::WriteHeader()
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{
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const u32 data_size = sizeof(SampleType) * m_num_channels * m_num_frames;
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WAV_HEADER header = {};
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header.chunk_id = 0x46464952; // 0x52494646
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header.chunk_size = sizeof(WAV_HEADER) - 8 + data_size;
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header.format = 0x45564157; // 0x57415645
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header.fmt_chunk.chunk_id = 0x20746d66; // 0x666d7420
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header.fmt_chunk.chunk_size = sizeof(header.fmt_chunk) - 8;
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header.fmt_chunk.audio_format = 1;
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header.fmt_chunk.num_channels = static_cast<u16>(m_num_channels);
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header.fmt_chunk.sample_rate = m_sample_rate;
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header.fmt_chunk.byte_rate = m_sample_rate * m_num_channels * sizeof(SampleType);
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header.fmt_chunk.block_align = static_cast<u16>(m_num_channels * sizeof(SampleType));
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header.fmt_chunk.bits_per_sample = 16;
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header.data_chunk_header.chunk_id = 0x61746164; // 0x64617461
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header.data_chunk_header.chunk_size = data_size;
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return (std::fwrite(&header, sizeof(header), 1, m_file) == 1);
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}
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