mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-11-24 18:00:09 +01:00
689 lines
18 KiB
C++
689 lines
18 KiB
C++
#if !defined(NSV_READER_HPP)
|
|
#define NSV_READER_HPP
|
|
//______________________________________________________________________________
|
|
//
|
|
// NSV_Reader.hpp
|
|
// NSV Reader Class
|
|
|
|
#include "NSV.hpp"
|
|
#include "endian.hpp"
|
|
|
|
#include <string>
|
|
#include <memory>
|
|
#include <fstream>
|
|
#include <sstream>
|
|
#include <cassert>
|
|
|
|
namespace NSV
|
|
{
|
|
|
|
//--------------------------------------
|
|
// Defines the interface for the basic_Reader template instantiations
|
|
class Reader_base
|
|
{
|
|
public:
|
|
virtual ~Reader_base()
|
|
{
|
|
}
|
|
|
|
virtual void open(const std::string& strFile) = 0;
|
|
virtual void close() = 0;
|
|
|
|
virtual File& file() = 0;
|
|
virtual const std::string& fileName() const = 0;
|
|
|
|
virtual void readFileHeader() = 0;
|
|
virtual void readFrame() = 0;
|
|
virtual void readFrameInfo() = 0;
|
|
virtual void readFrameHeader() = 0;
|
|
virtual void readPayload() = 0;
|
|
virtual void readPayloadInfo() = 0;
|
|
virtual void readPayloadHeader(int& nAux, int& iAuxPlusVideo, int& iAudio) = 0;
|
|
|
|
virtual void buildIndex(int nIndexEntries) = 0;
|
|
|
|
virtual INT64 frames() const = 0;
|
|
virtual INT64 frame() const = 0;
|
|
virtual void seek(INT64 nFrame) = 0;
|
|
virtual void readSample(int nStream, unsigned char* pData, size_t sizeDataMax, size_t& sizeData, bool& bKeyFrame) = 0;
|
|
virtual bool eof() = 0;
|
|
|
|
virtual const FileHeader& fileHeader() const = 0;
|
|
virtual const FrameHeader& frameHeader() const = 0;
|
|
|
|
virtual void* get_ifs() = 0;
|
|
};
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
class basic_Reader : public Reader_base
|
|
{
|
|
public:
|
|
basic_Reader(File& f);
|
|
~basic_Reader();
|
|
|
|
void open(const std::string& strFile);
|
|
void close();
|
|
|
|
File& file();
|
|
const std::string& fileName() const;
|
|
|
|
void readFileHeader();
|
|
void readFrame();
|
|
void readFrameInfo();
|
|
void readFrameHeader();
|
|
void readPayload();
|
|
void readPayloadInfo();
|
|
void readPayloadHeader(int& nAux, int& iAuxPlusVideo, int& iAudio);
|
|
|
|
void buildIndex(int nIndexEntries = 0); // index all frames by default
|
|
|
|
INT64 frames() const;
|
|
INT64 frame() const;
|
|
void seek(INT64 nFrame);
|
|
void readSample(int nStream, unsigned char* pData, size_t sizeDataMax, size_t& sizeData, bool& bKeyFrame);
|
|
bool eof();
|
|
|
|
const FileHeader& fileHeader() const;
|
|
const FrameHeader& frameHeader() const;
|
|
|
|
void* get_ifs();
|
|
|
|
private:
|
|
basic_Reader(const basic_Reader& r); // Not implemented
|
|
basic_Reader& operator=(const basic_Reader& r); // Not implemented
|
|
|
|
short read_i16();
|
|
unsigned short read_ui16();
|
|
int read_i32();
|
|
unsigned int read_ui32();
|
|
|
|
File& m_file;
|
|
std::string m_strFile;
|
|
T m_ifs;
|
|
|
|
FileHeader m_fileHeader;
|
|
FrameHeader m_frameHeader;
|
|
bool m_bFrameHeader;
|
|
|
|
INT64 m_nFrame;
|
|
};
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
basic_Reader<T>::basic_Reader(File& f) :
|
|
m_file(f),
|
|
m_strFile(),
|
|
m_fileHeader(),
|
|
m_frameHeader(),
|
|
m_bFrameHeader(false),
|
|
m_nFrame(0)
|
|
{
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
basic_Reader<T>::~basic_Reader()
|
|
{
|
|
close();
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::open(const std::string& strFile)
|
|
{
|
|
m_strFile = strFile;
|
|
|
|
m_ifs.open(m_strFile.c_str(), IOS_BASE::binary);
|
|
if (!m_ifs)
|
|
{
|
|
std::ostringstream ossError;
|
|
ossError << "Error opening file " << m_strFile;
|
|
throw Exception(ossError.str());
|
|
}
|
|
|
|
readFileHeader();
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::close()
|
|
{
|
|
if (m_ifs)
|
|
{
|
|
m_ifs.close();
|
|
}
|
|
|
|
m_strFile.erase();
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
File& basic_Reader<T>::file()
|
|
{
|
|
return m_file;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
const std::string& basic_Reader<T>::fileName() const
|
|
{
|
|
return m_strFile;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::readFileHeader()
|
|
{
|
|
assert(m_ifs);
|
|
|
|
// Read file header signature
|
|
char cSignature[5];
|
|
m_ifs.read(cSignature, 4);
|
|
if (strncmp(cSignature, "NSVf", 4) == 0)
|
|
{
|
|
cSignature[4] = '\0';
|
|
m_fileHeader.m_fccSignature = cSignature;
|
|
m_fileHeader.m_sizeHeader = read_i32();
|
|
m_fileHeader.m_sizeFile = read_i32();
|
|
m_fileHeader.m_iFileSize_ms = read_i32();
|
|
m_fileHeader.m_sizeMetaData = read_i32();
|
|
m_fileHeader.m_nTOCAlloc = read_i32();
|
|
m_fileHeader.m_nTOCSize = read_i32();
|
|
|
|
if ((m_fileHeader.m_sizeFile > 0 && m_fileHeader.m_sizeFile < m_fileHeader.m_sizeHeader)
|
|
|| m_fileHeader.m_nTOCSize > m_fileHeader.m_nTOCAlloc)
|
|
{
|
|
throw Exception("Invalid NSV file header");
|
|
}
|
|
|
|
if (m_fileHeader.m_sizeMetaData > 0)
|
|
{
|
|
std::auto_ptr<char> apcMetaData(new char[m_fileHeader.m_sizeMetaData + 1]);
|
|
char* pcMetaData = apcMetaData.get();
|
|
if (pcMetaData == 0)
|
|
{
|
|
throw Exception("Out of memory");
|
|
}
|
|
|
|
m_ifs.read(pcMetaData, m_fileHeader.m_sizeMetaData);
|
|
pcMetaData[m_fileHeader.m_sizeMetaData] = '\0';
|
|
|
|
m_file.header(pcMetaData, m_fileHeader.m_nTOCSize);
|
|
}
|
|
else
|
|
{
|
|
m_file.header("", m_fileHeader.m_nTOCSize);
|
|
}
|
|
|
|
for (int nEntry = 0; nEntry < m_fileHeader.m_nTOCSize; ++nEntry)
|
|
{
|
|
POS_TYPE posOffset;
|
|
posOffset = read_ui32();
|
|
m_file.indexEntry(nEntry, posOffset);
|
|
}
|
|
|
|
m_ifs.ignore((m_fileHeader.m_nTOCAlloc - m_fileHeader.m_nTOCSize) * 4);
|
|
|
|
if (m_ifs.tellg() > static_cast<POS_TYPE>(m_fileHeader.m_sizeHeader))
|
|
{
|
|
throw Exception("Invalid NSV file header");
|
|
}
|
|
|
|
m_file.dataOffset(m_fileHeader.m_sizeHeader);
|
|
m_ifs.seekg(m_file.dataOffset());
|
|
}
|
|
else // No file header present
|
|
{
|
|
m_fileHeader.m_sizeHeader = 0;
|
|
m_ifs.seekg(0, IOS_BASE::end);
|
|
m_fileHeader.m_sizeFile = m_ifs.tellg();
|
|
|
|
m_fileHeader.m_iFileSize_ms = 0;
|
|
m_fileHeader.m_nTOCAlloc = 0;
|
|
m_file.header("", 0);
|
|
|
|
m_file.dataOffset(0);
|
|
m_ifs.seekg(m_file.dataOffset());
|
|
}
|
|
|
|
// Read stream info from first frame header
|
|
readFrameHeader();
|
|
int nAux;
|
|
int iAuxPlusVideo;
|
|
int iAudio;
|
|
readPayloadHeader(nAux, iAuxPlusVideo, iAudio);
|
|
|
|
m_file.size(m_frameHeader.m_iWidth, m_frameHeader.m_iHeight);
|
|
m_file.frameRate(m_frameHeader.m_iFrameRate);
|
|
|
|
if (m_fileHeader.m_iFileSize_ms > 0)
|
|
{
|
|
INT64 nFramesDenom = static_cast<INT64>(m_file.rateDenom()) * 1000;
|
|
INT64 nFrames = (static_cast<INT64>(m_fileHeader.m_iFileSize_ms) * static_cast<INT64>(m_file.rateNum()) + nFramesDenom / 2) / nFramesDenom;
|
|
m_file.frames(nFrames);
|
|
}
|
|
|
|
// Set up primary video and audio streams
|
|
m_file.newStream(m_frameHeader.m_fccVideo);
|
|
m_file.newStream(m_frameHeader.m_fccAudio);
|
|
m_file.stream(0).rate(m_file.rateNum(), m_file.rateDenom());
|
|
m_file.stream(0).samples(m_file.frames());
|
|
|
|
// Set up aux streams
|
|
for (int n = 0; n < nAux; ++n)
|
|
{
|
|
unsigned short uh = read_ui16();
|
|
unsigned long ul = read_ui32();
|
|
m_ifs.ignore(uh);
|
|
|
|
m_file.newStream(FourCC(ul));
|
|
// More info ...
|
|
}
|
|
|
|
m_ifs.seekg(m_file.dataOffset());
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::readFrame()
|
|
{
|
|
readFrameHeader();
|
|
readPayload();
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::readFrameInfo()
|
|
{
|
|
readFrameHeader();
|
|
readPayloadInfo();
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::readFrameHeader()
|
|
{
|
|
assert(m_ifs);
|
|
|
|
// Read frame header signature
|
|
char cSignature[5];
|
|
m_ifs.read(cSignature, 2);
|
|
if (strncmp(cSignature, "\xef\xbe", 2) == 0)
|
|
{
|
|
m_frameHeader.m_fccSignature = 0UL;
|
|
m_frameHeader.m_bKeyFrame = false;
|
|
m_file.syncOffset(0);
|
|
return;
|
|
}
|
|
|
|
m_ifs.read(&cSignature[2], 2);
|
|
if (strncmp(cSignature, "NSVs", 4) != 0)
|
|
{
|
|
throw Exception("Invalid NSV frame header");
|
|
}
|
|
|
|
cSignature[4] = '\0';
|
|
m_frameHeader.m_fccSignature = cSignature;
|
|
m_ifs.read(reinterpret_cast<char*>(&m_frameHeader.m_fccVideo), 4);
|
|
m_ifs.read(reinterpret_cast<char*>(&m_frameHeader.m_fccAudio), 4);
|
|
m_frameHeader.m_iWidth = read_i16();
|
|
m_frameHeader.m_iHeight = read_i16();
|
|
unsigned char uc;
|
|
m_ifs.read(reinterpret_cast<char*>(&uc), 1);
|
|
m_frameHeader.m_iFrameRate = uc;
|
|
m_frameHeader.m_iSyncOffset_ms = read_i16();
|
|
m_frameHeader.m_bKeyFrame = true;
|
|
|
|
if (!m_bFrameHeader)
|
|
{
|
|
// m_file.newStream(m_frameHeader.m_fccVideo);
|
|
// m_file.newStream(m_frameHeader.m_fccAudio);
|
|
// m_file.size(m_frameHeader.m_iWidth, m_frameHeader.m_iHeight);
|
|
// m_file.frameRate(m_frameHeader.m_iFrameRate);
|
|
|
|
m_bFrameHeader = true;
|
|
}
|
|
else
|
|
{
|
|
if ((m_file.streamVideo() >= 0 && m_file.videoFormat() != m_frameHeader.m_fccVideo)
|
|
|| (m_file.streamAudio() >= 0 && m_file.audioFormat() != m_frameHeader.m_fccAudio)
|
|
|| m_file.width() != m_frameHeader.m_iWidth
|
|
|| m_file.height() != m_frameHeader.m_iHeight
|
|
|| m_file.frameRate() != m_frameHeader.m_iFrameRate)
|
|
{
|
|
throw Exception("Invalid NSV frame header");
|
|
}
|
|
}
|
|
|
|
m_file.syncOffset(m_frameHeader.m_iSyncOffset_ms);
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::readPayload()
|
|
{
|
|
assert(m_ifs);
|
|
|
|
int nAux;
|
|
int iAuxPlusVideo;
|
|
int iAudio;
|
|
readPayloadHeader(nAux, iAuxPlusVideo, iAudio);
|
|
|
|
int iAux = 0;
|
|
|
|
for (int n = 0; n < nAux; ++n)
|
|
{
|
|
unsigned short uh = read_ui16();
|
|
unsigned int ui = read_ui32();
|
|
|
|
Stream& s = m_file.stream(m_file.streamAux(n));
|
|
s.dataSize(uh);
|
|
m_ifs.read(reinterpret_cast<char*>(s.data()), uh);
|
|
|
|
iAux += uh;
|
|
}
|
|
|
|
if (m_file.streamVideo() >= 0)
|
|
{
|
|
int iVideo = iAuxPlusVideo - iAux;
|
|
Stream& sVideo = m_file.stream(m_file.streamVideo());
|
|
sVideo.dataSize(iVideo);
|
|
m_ifs.read(reinterpret_cast<char*>(sVideo.data()), iVideo);
|
|
sVideo.keyFrame(m_frameHeader.m_bKeyFrame);
|
|
}
|
|
else
|
|
{
|
|
m_ifs.seekg(iAuxPlusVideo - iAux, IOS_BASE::cur);
|
|
}
|
|
|
|
if (m_file.streamAudio() >= 0)
|
|
{
|
|
Stream& sAudio = m_file.stream(m_file.streamAudio());
|
|
sAudio.dataSize(iAudio);
|
|
m_ifs.read(reinterpret_cast<char*>(sAudio.data()), iAudio);
|
|
sAudio.keyFrame(true);
|
|
}
|
|
else
|
|
{
|
|
m_ifs.seekg(iAudio, IOS_BASE::cur);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::readPayloadInfo()
|
|
{
|
|
assert(m_ifs);
|
|
|
|
int nAux;
|
|
int iAuxPlusVideo;
|
|
int iAudio;
|
|
readPayloadHeader(nAux, iAuxPlusVideo, iAudio);
|
|
|
|
int iAux = 0;
|
|
|
|
for (int n = 0; n < nAux; ++n)
|
|
{
|
|
unsigned short uh = read_ui16();
|
|
unsigned int ui = read_ui32();
|
|
m_ifs.ignore(uh);
|
|
|
|
Stream& s = m_file.stream(m_file.streamAux(n));
|
|
s.dataSize(uh);
|
|
|
|
iAux += uh;
|
|
}
|
|
|
|
if (m_file.streamVideo() >= 0)
|
|
{
|
|
int iVideo = iAuxPlusVideo - iAux;
|
|
Stream& sVideo = m_file.stream(m_file.streamVideo());
|
|
sVideo.dataSize(iVideo);
|
|
sVideo.keyFrame(m_frameHeader.m_bKeyFrame);
|
|
}
|
|
|
|
if (m_file.streamAudio() >= 0)
|
|
{
|
|
Stream& sAudio = m_file.stream(m_file.streamAudio());
|
|
sAudio.dataSize(iAudio);
|
|
sAudio.keyFrame(true);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::readPayloadHeader(int& nAux, int& iAuxPlusVideo, int& iAudio)
|
|
{
|
|
assert(m_ifs);
|
|
|
|
char c;
|
|
unsigned short uh;
|
|
unsigned short uhAudio;
|
|
|
|
m_ifs.get(c);
|
|
uh = read_ui16();
|
|
uhAudio = read_ui16();
|
|
|
|
nAux = c & 0xf;
|
|
iAuxPlusVideo = (static_cast<int>(uh) << 4) | ((c >> 4) & 0xf);
|
|
iAudio = uhAudio;
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::buildIndex(int nIndexEntries)
|
|
{
|
|
assert(nIndexEntries == 0); // Only creates full index for now ...
|
|
|
|
m_file.index().clear();
|
|
m_file.frames(0);
|
|
|
|
m_ifs.seekg(m_file.dataOffset());
|
|
|
|
INT64 nFrames = 0;
|
|
for (; !eof(); ++nFrames)
|
|
{
|
|
m_file.appendIndexEntry(static_cast<POS_TYPE>(m_ifs.tellg()) - m_file.dataOffset());
|
|
|
|
readFrameHeader();
|
|
int nAux;
|
|
int iAuxPlusVideo;
|
|
int iAudio;
|
|
readPayloadHeader(nAux, iAuxPlusVideo, iAudio);
|
|
m_ifs.seekg(iAuxPlusVideo + iAudio, IOS_BASE::cur);
|
|
}
|
|
|
|
m_file.frames(nFrames);
|
|
|
|
m_ifs.seekg(m_file.dataOffset());
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
INT64 basic_Reader<T>::frames() const
|
|
{
|
|
return m_file.frames();
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
INT64 basic_Reader<T>::frame() const
|
|
{
|
|
return m_nFrame;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::seek(INT64 nFrame)
|
|
{
|
|
assert(m_ifs);
|
|
INT64 nFrames = m_file.frames();
|
|
assert(nFrame < nFrames || nFrames == -1);
|
|
|
|
int nIndexEntries = m_file.index().size();
|
|
|
|
if (nIndexEntries > 0)
|
|
{
|
|
int nIndexEntry = nIndexEntries * nFrame / nFrames;
|
|
INT64 nFrameIndex = (nIndexEntry * nFrames + nIndexEntries / 2) / nIndexEntries;
|
|
|
|
m_ifs.seekg(m_file.dataOffset() + m_file.index()[nIndexEntry].m_posOffset);
|
|
|
|
for (; nFrameIndex < nFrame; ++nFrameIndex)
|
|
{
|
|
readFrameHeader();
|
|
int nAux;
|
|
int iAuxPlusVideo;
|
|
int iAudio;
|
|
readPayloadHeader(nAux, iAuxPlusVideo, iAudio);
|
|
m_ifs.seekg(iAuxPlusVideo + iAudio, IOS_BASE::cur);
|
|
}
|
|
|
|
m_nFrame = nFrame;
|
|
}
|
|
else
|
|
{
|
|
m_ifs.seekg(m_file.dataOffset());
|
|
|
|
for (m_nFrame = 0; m_nFrame < nFrame; ++m_nFrame)
|
|
{
|
|
readFrameHeader();
|
|
int nAux;
|
|
int iAuxPlusVideo;
|
|
int iAudio;
|
|
readPayloadHeader(nAux, iAuxPlusVideo, iAudio);
|
|
m_ifs.seekg(iAuxPlusVideo + iAudio, IOS_BASE::cur);
|
|
}
|
|
|
|
assert(m_nFrame == nFrame);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void basic_Reader<T>::readSample(int nStream, unsigned char* pData, size_t sizeDataMax, size_t& sizeData, bool& bKeyFrame)
|
|
{
|
|
assert(m_ifs);
|
|
assert(pData != 0);
|
|
|
|
readFrame();
|
|
|
|
Stream& s = m_file.stream(nStream);
|
|
|
|
size_t size = s.dataSize();
|
|
if (sizeDataMax < s.dataSize())
|
|
{
|
|
size = sizeDataMax;
|
|
}
|
|
|
|
memcpy(pData, s.data(), size);
|
|
sizeData = s.dataSize();
|
|
|
|
bKeyFrame = s.keyFrame();
|
|
|
|
return;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
bool basic_Reader<T>::eof()
|
|
{
|
|
return m_ifs.tellg() >= m_fileHeader.m_sizeFile;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
const FileHeader& basic_Reader<T>::fileHeader() const
|
|
{
|
|
return m_fileHeader;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
const FrameHeader& basic_Reader<T>::frameHeader() const
|
|
{
|
|
return m_frameHeader;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
void* basic_Reader<T>::get_ifs()
|
|
{
|
|
return &m_ifs;
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
short basic_Reader<T>::read_i16()
|
|
{
|
|
assert(m_ifs);
|
|
|
|
short i16;
|
|
m_ifs.read(reinterpret_cast<char*>(&i16), 2);
|
|
|
|
return native_endian(i16, false);
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
unsigned short basic_Reader<T>::read_ui16()
|
|
{
|
|
assert(m_ifs);
|
|
|
|
unsigned short ui16;
|
|
m_ifs.read(reinterpret_cast<char*>(&ui16), 2);
|
|
|
|
return native_endian(ui16, false);
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
int basic_Reader<T>::read_i32()
|
|
{
|
|
assert(m_ifs);
|
|
|
|
int i32;
|
|
m_ifs.read(reinterpret_cast<char*>(&i32), 4);
|
|
|
|
return native_endian(i32, false);
|
|
}
|
|
|
|
//--------------------------------------
|
|
template<typename T>
|
|
unsigned int basic_Reader<T>::read_ui32()
|
|
{
|
|
assert(m_ifs);
|
|
|
|
unsigned int ui32;
|
|
m_ifs.read(reinterpret_cast<char*>(&ui32), 4);
|
|
|
|
return native_endian(ui32, false);
|
|
}
|
|
|
|
} // namespace NSV
|
|
|
|
#endif // NSV_READER_HPP
|