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Add MpegDemux for demuxing audios.
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@@ -233,6 +233,7 @@
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<ClCompile Include="HW\atrac3plus.cpp" />
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<ClCompile Include="HW\MediaEngine.cpp" />
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<ClCompile Include="HW\MemoryStick.cpp" />
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<ClCompile Include="HW\MpegDemux.cpp" />
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<ClCompile Include="HW\OMAConvert.cpp" />
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<ClCompile Include="HW\SasAudio.cpp" />
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<ClCompile Include="Loaders.cpp" />
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@@ -411,6 +412,7 @@
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<ClInclude Include="Host.h" />
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<ClInclude Include="HW\atrac3plus.h" />
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<ClInclude Include="HW\MediaEngine.h" />
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<ClInclude Include="HW\MpegDemux.h" />
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<ClInclude Include="HW\OMAConvert.h" />
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<ClInclude Include="HW\SasAudio.h" />
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<ClInclude Include="HW\MemoryStick.h" />
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@@ -430,6 +430,9 @@
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<ClCompile Include="HW\atrac3plus.cpp">
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<Filter>HW</Filter>
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</ClCompile>
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<ClCompile Include="HW\MpegDemux.cpp">
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<Filter>HW</Filter>
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</ClCompile>
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</ItemGroup>
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<ItemGroup>
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<ClInclude Include="ELF\ElfReader.h">
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@@ -795,6 +798,9 @@
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<ClInclude Include="HW\atrac3plus.h">
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<Filter>HW</Filter>
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</ClInclude>
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<ClInclude Include="HW\MpegDemux.h">
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<Filter>HW</Filter>
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</ClInclude>
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</ItemGroup>
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<ItemGroup>
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<None Include="CMakeLists.txt" />
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@@ -802,4 +808,4 @@
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<None Include="..\android\jni\Android.mk" />
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<None Include="GameLogNotes.txt" />
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</ItemGroup>
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</Project>
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</Project>
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@@ -0,0 +1,192 @@
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#include "MpegDemux.h"
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const int PACKET_START_CODE_MASK = 0xffffff00;
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const int PACKET_START_CODE_PREFIX = 0x00000100;
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const int SEQUENCE_START_CODE = 0x000001b3;
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const int EXT_START_CODE = 0x000001b5;
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const int SEQUENCE_END_CODE = 0x000001b7;
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const int GOP_START_CODE = 0x000001b8;
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const int ISO_11172_END_CODE = 0x000001b9;
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const int PACK_START_CODE = 0x000001ba;
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const int SYSTEM_HEADER_START_CODE = 0x000001bb;
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const int PROGRAM_STREAM_MAP = 0x000001bc;
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const int PRIVATE_STREAM_1 = 0x000001bd;
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const int PADDING_STREAM = 0x000001be;
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const int PRIVATE_STREAM_2 = 0x000001bf;
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MpegDemux::MpegDemux(u8* buffer, int size, int offset)
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{
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m_buf = buffer;
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m_len = size;
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m_index = offset;
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m_audioStream = 0;
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m_audiopos = 0;
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m_audioChannel = -1;
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m_readSize = 0;
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}
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MpegDemux::~MpegDemux(void)
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{
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if (m_audioStream)
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delete [] m_audioStream;
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}
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void MpegDemux::setReadSize(int readSize)
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{
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m_readSize = readSize;
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}
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int MpegDemux::readPesHeader(PesHeader &pesHeader, int length, int startCode) {
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int c = 0;
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while (length > 0) {
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c = read8();
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length--;
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if (c != 0xFF) {
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break;
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}
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}
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if ((c & 0xC0) == 0x40) {
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read8();
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c = read8();
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length -= 2;
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}
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pesHeader.pts = 0;
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pesHeader.dts = 0;
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if ((c & 0xE0) == 0x20) {
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pesHeader.dts = pesHeader.pts = readPts(c);
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length -= 4;
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if ((c & 0x10) != 0) {
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pesHeader.dts = readPts();
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length -= 5;
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}
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} else if ((c & 0xC0) == 0x80) {
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int flags = read8();
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int headerLength = read8();
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length -= 2;
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length -= headerLength;
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if ((flags & 0x80) != 0) {
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pesHeader.dts = pesHeader.pts = readPts();
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headerLength -= 5;
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if ((flags & 0x40) != 0) {
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pesHeader.dts = readPts();
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headerLength -= 5;
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}
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}
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if ((flags & 0x3F) != 0 && headerLength == 0) {
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flags &= 0xC0;
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}
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if ((flags & 0x01) != 0) {
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int pesExt = read8();
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headerLength--;
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int skip = (pesExt >> 4) & 0x0B;
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skip += skip & 0x09;
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if ((pesExt & 0x40) != 0 || skip > headerLength) {
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pesExt = skip = 0;
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}
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this->skip(skip);
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headerLength -= skip;
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if ((pesExt & 0x01) != 0) {
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int ext2Length = read8();
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headerLength--;
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if ((ext2Length & 0x7F) != 0) {
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int idExt = read8();
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headerLength--;
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if ((idExt & 0x80) == 0) {
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startCode = ((startCode & 0xFF) << 8) | idExt;
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}
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}
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}
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}
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skip(headerLength);
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}
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if (startCode == PRIVATE_STREAM_1) {
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int channel = read8();
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pesHeader.channel = channel;
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length--;
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if (channel >= 0x80 && channel <= 0xCF) {
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// Skip audio header
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skip(3);
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length -= 3;
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if (channel >= 0xB0 && channel <= 0xBF) {
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skip(1);
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length--;
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}
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} else {
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// PSP audio has additional 3 bytes in header
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skip(3);
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length -= 3;
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}
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}
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return length;
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}
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int MpegDemux::demuxStream(bool bdemux, int startCode, int channel)
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{
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int length = read16();
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if (bdemux) {
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PesHeader pesHeader(channel);
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length = readPesHeader(pesHeader, length, startCode);
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if (pesHeader.channel == channel || channel < 0) {
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channel = pesHeader.channel;
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memcpy(m_audioStream + m_audiopos, m_buf + m_index, length);
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m_audiopos += length;
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}
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skip(length);
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} else {
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skip(length);
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}
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return channel;
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}
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void MpegDemux::demux()
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{
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if (!m_audioStream)
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m_audioStream = new u8[m_len - m_index];
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while (m_index < m_len)
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{
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if (m_readSize != m_len && m_index + 2048 > m_readSize)
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return;
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// Search for start code
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int startCode = 0xFF;
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while ((startCode & PACKET_START_CODE_MASK) != PACKET_START_CODE_PREFIX && !isEOF()) {
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startCode = (startCode << 8) | read8();
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}
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switch (startCode) {
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case PACK_START_CODE: {
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skip(10);
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break;
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}
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case SYSTEM_HEADER_START_CODE: {
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skip(14);
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break;
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}
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case PADDING_STREAM:
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case PRIVATE_STREAM_2: {
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int length = read16();
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skip(length);
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break;
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}
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case PRIVATE_STREAM_1: {
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// Audio stream
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m_audioChannel = demuxStream(true, startCode, m_audioChannel);
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break;
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}
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case 0x1E0: case 0x1E1: case 0x1E2: case 0x1E3:
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case 0x1E4: case 0x1E5: case 0x1E6: case 0x1E7:
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case 0x1E8: case 0x1E9: case 0x1EA: case 0x1EB:
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case 0x1EC: case 0x1ED: case 0x1EE: case 0x1EF: {
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// Video Stream
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demuxStream(false, startCode, -1);
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break;
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}
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}
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}
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}
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int MpegDemux::getaudioStream(u8** audioStream)
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{
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*audioStream = m_audioStream;
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return m_audiopos;
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}
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@@ -0,0 +1,63 @@
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// This is a simple version MpegDemux that can get media's audio stream.
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// Thanks to JPCSP project.
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#pragma once
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#include "../../Globals.h"
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class MpegDemux
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{
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public:
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MpegDemux(u8* buffer, int size, int offset);
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~MpegDemux(void);
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void setReadSize(int readSize);
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void demux();
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// return it's size
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int getaudioStream(u8 **audioStream);
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private:
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struct PesHeader {
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long pts;
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long dts;
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int channel;
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PesHeader(int chan) {
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pts = 0;
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dts = 0;
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channel = chan;
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}
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};
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int read8() {
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return m_buf[m_index++] & 0xFF;
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}
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int read16() {
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return (read8() << 8) | read8();
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}
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long readPts() {
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return readPts(read8());
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}
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long readPts(int c) {
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return (((long) (c & 0x0E)) << 29) | ((read16() >> 1) << 15) | (read16() >> 1);
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}
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bool isEOF() {
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return m_index >= m_len;
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}
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void skip(int n) {
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if (n > 0) {
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m_index += n;
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}
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}
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int readPesHeader(PesHeader &pesHeader, int length, int startCode);
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int demuxStream(bool bdemux, int startCode, int channel);
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private:
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int m_index;
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int m_len;
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u8* m_buf;
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u8* m_audioStream;
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int m_audiopos;
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int m_audioChannel;
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int m_readSize;
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};
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