mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
synced 2024-12-26 11:51:56 +01:00
1a0908497a
than before if problems occur -replaced most malloc by MEM2_alloc, as well as free and SAFE_FREE replaced by MEM2_free
829 lines
18 KiB
C++
829 lines
18 KiB
C++
/***************************************************************************
|
|
* Copyright (C) 2010
|
|
* by thakis
|
|
*
|
|
* Modification and adjustment for the Wii by Dimok
|
|
*
|
|
* This software is provided 'as-is', without any express or implied
|
|
* warranty. In no event will the authors be held liable for any
|
|
* damages arising from the use of this software.
|
|
*
|
|
* Permission is granted to anyone to use this software for any
|
|
* purpose, including commercial applications, and to alter it and
|
|
* redistribute it freely, subject to the following restrictions:
|
|
*
|
|
* 1. The origin of this software must not be misrepresented; you
|
|
* must not claim that you wrote the original software. If you use
|
|
* this software in a product, an acknowledgment in the product
|
|
* documentation would be appreciated but is not required.
|
|
*
|
|
* 2. Altered source versions must be plainly marked as such, and
|
|
* must not be misrepresented as being the original software.
|
|
*
|
|
* 3. This notice may not be removed or altered from any source
|
|
* distribution.
|
|
*
|
|
* gcvid.cpp
|
|
***************************************************************************/
|
|
|
|
#include <cstdlib> //NULL
|
|
#include <cstring> //memcmp
|
|
#include <string>
|
|
#include <cassert>
|
|
|
|
#include "gcvid.h"
|
|
#include "utils.h"
|
|
#include "mem2.hpp"
|
|
|
|
using namespace std;
|
|
|
|
void readThpHeader(FILE* f, ThpHeader& h)
|
|
{
|
|
fread(&h, sizeof(h), 1, f);
|
|
}
|
|
|
|
void readThpComponents(FILE* f, ThpComponents& c)
|
|
{
|
|
fread(&c, sizeof(c), 1, f);
|
|
}
|
|
|
|
void readThpVideoInfo(FILE* f, ThpVideoInfo& i, bool isVersion11)
|
|
{
|
|
fread(&i, sizeof(i), 1, f);
|
|
if(!isVersion11)
|
|
{
|
|
i.unknown = 0;
|
|
fseek(f, -4, SEEK_CUR);
|
|
}
|
|
}
|
|
|
|
void readThpAudioInfo(FILE* f, ThpAudioInfo& i, bool isVersion11)
|
|
{
|
|
fread(&i, sizeof(i), 1, f);
|
|
if(!isVersion11)
|
|
{
|
|
i.numData = 1;
|
|
fseek(f, -4, SEEK_CUR);
|
|
}
|
|
}
|
|
|
|
void readMthHeader(FILE* f, MthHeader& h)
|
|
{
|
|
fread(&h, sizeof(h), 1, f);
|
|
}
|
|
|
|
|
|
struct DecStruct
|
|
{
|
|
const u8* currSrcByte;
|
|
u32 blockCount;
|
|
u8 index;
|
|
u8 shift;
|
|
};
|
|
|
|
void thpAudioInitialize(DecStruct& s, const u8* srcStart)
|
|
{
|
|
s.currSrcByte = srcStart;
|
|
s.blockCount = 2;
|
|
s.index = (*s.currSrcByte >> 4) & 0x7;
|
|
s.shift = *s.currSrcByte & 0xf;
|
|
++s.currSrcByte;
|
|
}
|
|
|
|
s32 thpAudioGetNewSample(DecStruct& s)
|
|
{
|
|
//the following if is executed all 14 calls
|
|
//to thpAudioGetNewSample() (once for each
|
|
//microblock) because mask & 0xf can contain
|
|
//16 different values and starts with 2
|
|
if((s.blockCount & 0xf) == 0)
|
|
{
|
|
s.index = (*s.currSrcByte >> 4) & 0x7;
|
|
s.shift = *s.currSrcByte & 0xf;
|
|
++s.currSrcByte;
|
|
s.blockCount += 2;
|
|
}
|
|
|
|
s32 ret;
|
|
if((s.blockCount & 1) != 0)
|
|
{
|
|
s32 t = (*s.currSrcByte << 28) & 0xf0000000;
|
|
ret = t >> 28; //this has to be an arithmetic shift
|
|
++s.currSrcByte;
|
|
}
|
|
else
|
|
{
|
|
s32 t = (*s.currSrcByte << 24) & 0xf0000000;
|
|
ret = t >> 28; //this has to be an arithmetic shift
|
|
}
|
|
|
|
++s.blockCount;
|
|
return ret;
|
|
}
|
|
|
|
int thpAudioDecode(s16 * destBuffer, const u8* srcBuffer, bool separateChannelsInOutput, bool isInputStereo)
|
|
{
|
|
if(destBuffer == NULL || srcBuffer == NULL)
|
|
return 0;
|
|
|
|
ThpAudioBlockHeader* head = (ThpAudioBlockHeader*)srcBuffer;
|
|
|
|
u32 channelInSize = head->channelSize;
|
|
u32 numSamples = head->numSamples;
|
|
|
|
const u8* srcChannel1 = srcBuffer + sizeof(ThpAudioBlockHeader);
|
|
const u8* srcChannel2 = srcChannel1 + channelInSize;
|
|
|
|
s16* table1 = head->table1;
|
|
s16* table2 = head->table2;
|
|
|
|
s16* destChannel1, * destChannel2;
|
|
u32 delta;
|
|
|
|
if(separateChannelsInOutput)
|
|
{
|
|
//separated channels in output
|
|
destChannel1 = destBuffer;
|
|
destChannel2 = destBuffer + numSamples;
|
|
delta = 1;
|
|
}
|
|
else
|
|
{
|
|
//interleaved channels in output
|
|
destChannel1 = destBuffer;
|
|
destChannel2 = destBuffer + 1;
|
|
delta = 2;
|
|
}
|
|
|
|
DecStruct s;
|
|
if(!isInputStereo)
|
|
{
|
|
//mono channel in input
|
|
|
|
thpAudioInitialize(s, srcChannel1);
|
|
|
|
s16 prev1 = *(s16*)(srcBuffer + 72);
|
|
s16 prev2 = *(s16*)(srcBuffer + 74);
|
|
|
|
for(u32 i = 0; i < numSamples; ++i)
|
|
{
|
|
s64 res = (s64)thpAudioGetNewSample(s);
|
|
res = ((res << s.shift) << 11); //convert to 53.11 fixedpoint
|
|
|
|
//these values are 53.11 fixed point numbers
|
|
s64 val1 = table1[2*s.index];
|
|
s64 val2 = table1[2*s.index + 1];
|
|
|
|
//convert to 48.16 fixed point
|
|
res = (val1*prev1 + val2*prev2 + res) << 5;
|
|
|
|
//rounding:
|
|
u16 decimalPlaces = res & 0xffff;
|
|
if(decimalPlaces > 0x8000) //i.e. > 0.5
|
|
//round up
|
|
++res;
|
|
else if(decimalPlaces == 0x8000) //i.e. == 0.5
|
|
if((res & 0x10000) != 0)
|
|
//round up every other number
|
|
++res;
|
|
|
|
//get nonfractional parts of number, clamp to [-32768, 32767]
|
|
s32 final = (res >> 16);
|
|
if(final > 32767) final = 32767;
|
|
else if(final < -32768) final = -32768;
|
|
|
|
prev2 = prev1;
|
|
prev1 = final;
|
|
*destChannel1 = (s16)final;
|
|
*destChannel2 = (s16)final;
|
|
destChannel1 += delta;
|
|
destChannel2 += delta;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//two channels in input - nearly the same as for one channel,
|
|
//so no comments here (different lines are marked with XXX)
|
|
|
|
thpAudioInitialize(s, srcChannel1);
|
|
s16 prev1 = *(s16*)(srcBuffer + 72);
|
|
s16 prev2 = *(s16*)(srcBuffer + 74);
|
|
for(u32 i = 0; i < numSamples; ++i)
|
|
{
|
|
s64 res = (s64)thpAudioGetNewSample(s);
|
|
res = ((res << s.shift) << 11);
|
|
s64 val1 = table1[2*s.index];
|
|
s64 val2 = table1[2*s.index + 1];
|
|
res = (val1*prev1 + val2*prev2 + res) << 5;
|
|
u16 decimalPlaces = res & 0xffff;
|
|
if(decimalPlaces > 0x8000)
|
|
++res;
|
|
else if(decimalPlaces == 0x8000)
|
|
if((res & 0x10000) != 0)
|
|
++res;
|
|
s32 final = (res >> 16);
|
|
if(final > 32767) final = 32767;
|
|
else if(final < -32768) final = -32768;
|
|
prev2 = prev1;
|
|
prev1 = final;
|
|
*destChannel1 = (s16)final;
|
|
destChannel1 += delta;
|
|
}
|
|
|
|
thpAudioInitialize(s, srcChannel2);//XXX
|
|
prev1 = *(s16*)(srcBuffer + 76);//XXX
|
|
prev2 = *(s16*)(srcBuffer + 78);//XXX
|
|
for(u32 j = 0; j < numSamples; ++j)
|
|
{
|
|
s64 res = (s64)thpAudioGetNewSample(s);
|
|
res = ((res << s.shift) << 11);
|
|
s64 val1 = table2[2*s.index];//XXX
|
|
s64 val2 = table2[2*s.index + 1];//XXX
|
|
res = (val1*prev1 + val2*prev2 + res) << 5;
|
|
u16 decimalPlaces = res & 0xffff;
|
|
if(decimalPlaces > 0x8000)
|
|
++res;
|
|
else if(decimalPlaces == 0x8000)
|
|
if((res & 0x10000) != 0)
|
|
++res;
|
|
s32 final = (res >> 16);
|
|
if(final > 32767) final = 32767;
|
|
else if(final < -32768) final = -32768;
|
|
prev2 = prev1;
|
|
prev1 = final;
|
|
*destChannel2 = (s16)final;
|
|
destChannel2 += delta;
|
|
}
|
|
}
|
|
|
|
return numSamples;
|
|
}
|
|
|
|
|
|
VideoFrame::VideoFrame()
|
|
: _data(NULL), _w(0), _h(0), _p(0)
|
|
{}
|
|
|
|
VideoFrame::~VideoFrame()
|
|
{ dealloc(); }
|
|
|
|
void VideoFrame::resize(int width, int height)
|
|
{
|
|
if(width == _w && height == _h)
|
|
return;
|
|
|
|
dealloc();
|
|
_w = width;
|
|
_h = height;
|
|
|
|
//24 bpp, 4 byte padding
|
|
_p = 3*width;
|
|
_p += (4 - _p%4)%4;
|
|
|
|
_data = (u8 *)MEM2_alloc(_p * _h);
|
|
}
|
|
|
|
int VideoFrame::getWidth() const
|
|
{ return _w; }
|
|
|
|
int VideoFrame::getHeight() const
|
|
{ return _h; }
|
|
|
|
int VideoFrame::getPitch() const
|
|
{ return _p; }
|
|
|
|
u8* VideoFrame::getData()
|
|
{ return _data; }
|
|
|
|
const u8* VideoFrame::getData() const
|
|
{ return _data; }
|
|
|
|
void VideoFrame::dealloc()
|
|
{
|
|
MEM2_free(_data);
|
|
_w = _h = _p = 0;
|
|
}
|
|
|
|
//swaps red and blue channel of a video frame
|
|
void swapRB(VideoFrame& f)
|
|
{
|
|
u8* currLine = f.getData();
|
|
|
|
int hyt = f.getHeight();
|
|
int pitch = f.getPitch();
|
|
|
|
for(int y = 0; y < hyt; ++y)
|
|
{
|
|
for(int x = 0, x2 = 2; x < pitch; x += 3, x2 += 3)
|
|
{
|
|
u8 t = currLine[x];
|
|
currLine[x] = currLine[x2];
|
|
currLine[x2] = t;
|
|
}
|
|
currLine += pitch;
|
|
}
|
|
}
|
|
|
|
enum FILETYPE
|
|
{
|
|
THP, MTH, JPG,
|
|
UNKNOWN = -1
|
|
};
|
|
|
|
FILETYPE getFiletype(FILE* f)
|
|
{
|
|
long t = ftell(f);
|
|
fseek(f, 0, SEEK_SET);
|
|
|
|
u8 buff[4];
|
|
fread(buff, 1, 4, f);
|
|
|
|
FILETYPE ret = UNKNOWN;
|
|
if(memcmp("THP\0", buff, 4) == 0)
|
|
ret = THP;
|
|
else if(memcmp("MTHP", buff, 4) == 0)
|
|
ret = MTH;
|
|
else if(buff[0] == 0xff && buff[1] == 0xd8)
|
|
ret = JPG;
|
|
|
|
fseek(f, t, SEEK_SET);
|
|
return ret;
|
|
}
|
|
|
|
long getFilesize(FILE* f)
|
|
{
|
|
long t = ftell(f);
|
|
fseek(f, 0, SEEK_END);
|
|
long ret = ftell(f);
|
|
fseek(f, t, SEEK_SET);
|
|
return ret;
|
|
}
|
|
|
|
void decodeJpeg(const u8* data, int size, VideoFrame& dest);
|
|
|
|
|
|
VideoFile::VideoFile(FILE* f)
|
|
: loop(true), _f(f)
|
|
{}
|
|
|
|
VideoFile::~VideoFile()
|
|
{
|
|
SAFE_CLOSE(_f);
|
|
}
|
|
|
|
int VideoFile::getWidth() const
|
|
{ return 0; }
|
|
|
|
int VideoFile::getHeight() const
|
|
{ return 0; }
|
|
|
|
float VideoFile::getFps() const
|
|
{ return 0.f; }
|
|
|
|
int VideoFile::getFrameCount() const
|
|
{ return 0; }
|
|
|
|
int VideoFile::getCurrentFrameNr() const
|
|
{ return 0; }
|
|
|
|
bool VideoFile::hasSound() const
|
|
{ return false; }
|
|
|
|
int VideoFile::getNumChannels() const
|
|
{ return 0; }
|
|
|
|
int VideoFile::getFrequency() const
|
|
{ return 0; }
|
|
|
|
int VideoFile::getMaxAudioSamples() const
|
|
{ return 0; }
|
|
|
|
int VideoFile::getCurrentBuffer(s16*) const
|
|
{ return 0; }
|
|
|
|
void VideoFile::loadFrame(VideoFrame& frame, const u8* data, int size) const
|
|
{
|
|
decodeJpeg(data, size, frame);
|
|
}
|
|
|
|
|
|
ThpVideoFile::ThpVideoFile(FILE* f)
|
|
: VideoFile(f)
|
|
{
|
|
readThpHeader(f, _head);
|
|
|
|
//this is just to find files that have this field != 0, i
|
|
//have no such a file
|
|
assert(_head.offsetsDataOffset == 0);
|
|
|
|
readThpComponents(f, _components);
|
|
for(u32 i = 0; i < _components.numComponents; ++i)
|
|
{
|
|
if(_components.componentTypes[i] == 0) //video
|
|
readThpVideoInfo(_f, _videoInfo, _head.version == 0x00011000);
|
|
else if(_components.componentTypes[i] == 1) //audio
|
|
{
|
|
readThpAudioInfo(_f, _audioInfo, _head.version == 0x00011000);
|
|
assert(_head.maxAudioSamples != 0);
|
|
}
|
|
}
|
|
|
|
_numInts = 3;
|
|
if(_head.maxAudioSamples != 0)
|
|
_numInts = 4;
|
|
|
|
_currFrameNr = -1;
|
|
_nextFrameOffset = _head.firstFrameOffset;
|
|
_nextFrameSize = _head.firstFrameSize;
|
|
_currFrameData.resize(_head.maxBufferSize); //include some padding
|
|
loadNextFrame();
|
|
}
|
|
|
|
int ThpVideoFile::getWidth() const
|
|
{ return _videoInfo.width; }
|
|
|
|
int ThpVideoFile::getHeight() const
|
|
{ return _videoInfo.height; }
|
|
|
|
float ThpVideoFile::getFps() const
|
|
{ return _head.fps; }
|
|
|
|
int ThpVideoFile::getFrameCount() const
|
|
{ return _head.numFrames; }
|
|
|
|
int ThpVideoFile::getCurrentFrameNr() const
|
|
{ return _currFrameNr; }
|
|
|
|
bool ThpVideoFile::loadNextFrame()
|
|
{
|
|
++_currFrameNr;
|
|
if(_currFrameNr >= (int) _head.numFrames)
|
|
{
|
|
if (!loop)
|
|
return false;
|
|
|
|
_currFrameNr = 0;
|
|
_nextFrameOffset = _head.firstFrameOffset;
|
|
_nextFrameSize = _head.firstFrameSize;
|
|
}
|
|
|
|
fseek(_f, _nextFrameOffset, SEEK_SET);
|
|
fread(&_currFrameData[0], 1, _nextFrameSize, _f);
|
|
|
|
_nextFrameOffset += _nextFrameSize;
|
|
_nextFrameSize = *(u32*)&_currFrameData[0];
|
|
return true;
|
|
}
|
|
|
|
void ThpVideoFile::getCurrentFrame(VideoFrame& f) const
|
|
{
|
|
int size = *(u32*)(&_currFrameData[0] + 8);
|
|
loadFrame(f, &_currFrameData[0] + 4*_numInts, size);
|
|
}
|
|
|
|
bool ThpVideoFile::hasSound() const
|
|
{ return _head.maxAudioSamples != 0; }
|
|
|
|
int ThpVideoFile::getNumChannels() const
|
|
{
|
|
if(hasSound())
|
|
return _audioInfo.numChannels;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
int ThpVideoFile::getFrequency() const
|
|
{
|
|
if(hasSound())
|
|
return _audioInfo.frequency;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
int ThpVideoFile::getMaxAudioSamples() const
|
|
{ return _head.maxAudioSamples; }
|
|
|
|
int ThpVideoFile::getCurrentBuffer(s16* data) const
|
|
{
|
|
if(!hasSound())
|
|
return 0;
|
|
|
|
int jpegSize = *(u32*)(&_currFrameData[0] + 8);
|
|
const u8* src = &_currFrameData[0] + _numInts*4 + jpegSize;
|
|
|
|
return thpAudioDecode(data, src, false, _audioInfo.numChannels == 2);
|
|
}
|
|
|
|
MthVideoFile::MthVideoFile(FILE* f)
|
|
: VideoFile(f)
|
|
{
|
|
readMthHeader(f, _head);
|
|
|
|
_currFrameNr = -1;
|
|
_nextFrameOffset = _head.offset;
|
|
_nextFrameSize = _head.firstFrameSize;
|
|
_thisFrameSize = 0;
|
|
|
|
_currFrameData.resize(_head.maxFrameSize);
|
|
loadNextFrame();
|
|
}
|
|
|
|
|
|
int MthVideoFile::getWidth() const
|
|
{ return _head.width; }
|
|
|
|
int MthVideoFile::getHeight() const
|
|
{ return _head.height; }
|
|
|
|
float MthVideoFile::getFps() const
|
|
{
|
|
return (float) 1.0f*_head.fps; //TODO: This has to be in there somewhere
|
|
}
|
|
|
|
int MthVideoFile::getFrameCount() const
|
|
{
|
|
return _head.numFrames;
|
|
}
|
|
|
|
int MthVideoFile::getCurrentFrameNr() const
|
|
{ return _currFrameNr; }
|
|
|
|
bool MthVideoFile::loadNextFrame()
|
|
{
|
|
++_currFrameNr;
|
|
if(_currFrameNr >= (int) _head.numFrames)
|
|
{
|
|
if (!loop)
|
|
return false;
|
|
_currFrameNr = 0;
|
|
_nextFrameOffset = _head.offset;
|
|
_nextFrameSize = _head.firstFrameSize;
|
|
}
|
|
|
|
fseek(_f, _nextFrameOffset, SEEK_SET);
|
|
_currFrameData.resize(_nextFrameSize);
|
|
fread(&_currFrameData[0], 1, _nextFrameSize, _f);
|
|
_thisFrameSize = _nextFrameSize;
|
|
|
|
u32 nextSize;
|
|
nextSize = *(u32*)(&_currFrameData[0]);
|
|
_nextFrameOffset += _nextFrameSize;
|
|
_nextFrameSize = nextSize;
|
|
return true;
|
|
}
|
|
|
|
void MthVideoFile::getCurrentFrame(VideoFrame& f) const
|
|
{
|
|
int size = _thisFrameSize;
|
|
loadFrame(f, &_currFrameData[0] + 4, size - 4);
|
|
}
|
|
|
|
|
|
JpgVideoFile::JpgVideoFile(FILE* f)
|
|
: VideoFile(f)
|
|
{
|
|
vector<u8> data(getFilesize(f));
|
|
fread(&data[0], 1, getFilesize(f), f);
|
|
|
|
loadFrame(_currFrame, &data[0], getFilesize(f));
|
|
}
|
|
|
|
int JpgVideoFile::getWidth() const
|
|
{ return _currFrame.getWidth(); }
|
|
|
|
int JpgVideoFile::getHeight() const
|
|
{ return _currFrame.getHeight(); }
|
|
|
|
int JpgVideoFile::getFrameCount() const
|
|
{ return 1; }
|
|
|
|
void JpgVideoFile::getCurrentFrame(VideoFrame& f) const
|
|
{
|
|
f.resize(_currFrame.getWidth(), _currFrame.getHeight());
|
|
memcpy(f.getData(), _currFrame.getData(),f.getPitch()*f.getHeight());
|
|
}
|
|
|
|
VideoFile* openVideo(const string& fileName)
|
|
{
|
|
FILE* f = fopen(fileName.c_str(), "rb");
|
|
if(f == NULL)
|
|
return NULL;
|
|
|
|
FILETYPE type = getFiletype(f);
|
|
switch(type)
|
|
{
|
|
case THP:
|
|
return new ThpVideoFile(f);
|
|
case MTH:
|
|
return new MthVideoFile(f);
|
|
case JPG:
|
|
return new JpgVideoFile(f);
|
|
|
|
default:
|
|
SAFE_CLOSE(f);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
void closeVideo(VideoFile*& vf)
|
|
{
|
|
if(vf != NULL)
|
|
delete vf;
|
|
vf = NULL;
|
|
}
|
|
|
|
//as mentioned above, we have to convert 0xff to 0xff 0x00
|
|
//after the image date has begun (ie, after the 0xff 0xda marker)
|
|
//but we must not convert the end-of-image-marker (0xff 0xd9)
|
|
//this way. There may be 0xff 0xd9 bytes embedded in the image
|
|
//data though, so I add 4 bytes to the input buffer
|
|
//and fill them with zeroes and check for 0xff 0xd9 0 0
|
|
//as end-of-image marker. this is not correct, but works
|
|
//and is easier to code... ;-)
|
|
//a better solution would be to patch jpeglib so that this conversion
|
|
//is not neccessary
|
|
|
|
u8 endBytesThp[] = { 0xff, 0xd9, 0, 0 }; //used in thp files
|
|
u8 endBytesMth[] = { 0xff, 0xd9, 0xff, 0 }; //used in mth files
|
|
|
|
int countRequiredSize(const u8* data, int size, int& start, int& end)
|
|
{
|
|
start = 2*size;
|
|
end = size;
|
|
int count = 0;
|
|
|
|
int j;
|
|
for(j = size - 1; data[j] == 0; --j)
|
|
; //search end of data
|
|
|
|
if(data[j] == 0xd9) //thp file
|
|
end = j - 1;
|
|
else if(data[j] == 0xff) //mth file
|
|
end = j - 2;
|
|
|
|
for(int i = 0; i < end; ++i)
|
|
{
|
|
if(data[i] == 0xff)
|
|
{
|
|
//if i == srcSize - 1, then this would normally overrun src - that's why 4 padding
|
|
//bytes are included at the end of src
|
|
if(data[i + 1] == 0xda && start == 2*size)
|
|
start = i;
|
|
if(i > start)
|
|
++count;
|
|
}
|
|
}
|
|
return size + count;
|
|
}
|
|
|
|
void convertToRealJpeg(u8* dest, const u8* src, int srcSize, int start, int end)
|
|
{
|
|
int di = 0;
|
|
for(int i = 0; i < srcSize; ++i, ++di)
|
|
{
|
|
dest[di] = src[i];
|
|
//if i == srcSize - 1, then this would normally overrun src - that's why 4 padding
|
|
//bytes are included at the end of src
|
|
if(src[i] == 0xff && i > start && i < end)
|
|
{
|
|
++di;
|
|
dest[di] = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
void decodeRealJpeg(const u8* data, int size, VideoFrame& dest);
|
|
|
|
void decodeJpeg(const u8* data, int size, VideoFrame& dest)
|
|
{
|
|
//convert format so jpeglib understands it...
|
|
int start, end;
|
|
int newSize = countRequiredSize(data, size, start, end);
|
|
u8* buff = new u8[newSize];
|
|
convertToRealJpeg(buff, data, size, start, end);
|
|
|
|
//...and feed it to jpeglib
|
|
decodeRealJpeg(buff, newSize, dest);
|
|
|
|
delete [] buff;
|
|
}
|
|
|
|
extern "C"
|
|
{
|
|
#include "jpeglib.h"
|
|
#include <setjmp.h>
|
|
}
|
|
|
|
//the following functions are needed to let
|
|
//libjpeg read from memory instead of from a file...
|
|
//it's a little clumsy to do :-|
|
|
const u8* g_jpegBuffer;
|
|
int g_jpegSize;
|
|
bool g_isLoading = false;
|
|
|
|
void jpegInitSource(j_decompress_ptr)
|
|
{}
|
|
|
|
boolean jpegFillInputBuffer(j_decompress_ptr cinfo)
|
|
{
|
|
cinfo->src->next_input_byte = g_jpegBuffer;
|
|
cinfo->src->bytes_in_buffer = g_jpegSize;
|
|
return TRUE;
|
|
}
|
|
|
|
void jpegSkipInputData(j_decompress_ptr cinfo, long num_bytes)
|
|
{
|
|
cinfo->src->next_input_byte += num_bytes;
|
|
cinfo->src->bytes_in_buffer -= num_bytes;
|
|
}
|
|
|
|
boolean jpegResyncToRestart(j_decompress_ptr cinfo, int desired)
|
|
{
|
|
jpeg_resync_to_restart(cinfo, desired);
|
|
return TRUE;
|
|
}
|
|
|
|
void jpegTermSource(j_decompress_ptr)
|
|
{}
|
|
|
|
void jpegErrorHandler(j_common_ptr cinfo)
|
|
{
|
|
char buff[1024];
|
|
(*cinfo->err->format_message)(cinfo, buff);
|
|
//MessageBox(g_hWnd, buff, "JpegLib error:", MB_OK);
|
|
}
|
|
|
|
void decodeRealJpeg(const u8* data, int size, VideoFrame& dest)
|
|
{
|
|
if(g_isLoading)
|
|
return;
|
|
g_isLoading = true;
|
|
|
|
//decompressor state
|
|
jpeg_decompress_struct cinfo;
|
|
jpeg_error_mgr errorMgr;
|
|
|
|
//read from memory manager
|
|
jpeg_source_mgr sourceMgr;
|
|
|
|
cinfo.err = jpeg_std_error(&errorMgr);
|
|
errorMgr.error_exit = jpegErrorHandler;
|
|
|
|
jpeg_create_decompress(&cinfo);
|
|
|
|
//setup read-from-memory
|
|
g_jpegBuffer = data;
|
|
g_jpegSize = size;
|
|
sourceMgr.bytes_in_buffer = size;
|
|
sourceMgr.next_input_byte = data;
|
|
sourceMgr.init_source = jpegInitSource;
|
|
sourceMgr.fill_input_buffer = jpegFillInputBuffer;
|
|
sourceMgr.skip_input_data = jpegSkipInputData;
|
|
sourceMgr.resync_to_restart = jpegResyncToRestart;
|
|
sourceMgr.term_source = jpegTermSource;
|
|
cinfo.src = &sourceMgr;
|
|
|
|
jpeg_read_header(&cinfo, TRUE);
|
|
|
|
#if 1
|
|
//set quality/speed parameters to speed:
|
|
cinfo.do_fancy_upsampling = FALSE;
|
|
cinfo.do_block_smoothing = FALSE;
|
|
|
|
//this actually slows decoding down:
|
|
//cinfo.dct_method = JDCT_FASTEST;
|
|
#endif
|
|
|
|
jpeg_start_decompress(&cinfo);
|
|
|
|
dest.resize(cinfo.output_width, cinfo.output_height);
|
|
|
|
if(cinfo.num_components == 3)
|
|
{
|
|
int y = 0;
|
|
while(cinfo.output_scanline < cinfo.output_height)
|
|
{
|
|
//invert image because windows wants it downside up
|
|
u8* destBuffer = &dest.getData()[(dest.getHeight() - y - 1)*dest.getPitch()];
|
|
|
|
//NO idea why jpeglib wants a pointer to a pointer
|
|
jpeg_read_scanlines(&cinfo, &destBuffer, 1);
|
|
++y;
|
|
}
|
|
|
|
//jpeglib gives an error in jpeg_finish_decompress() if no all
|
|
//scanlines are read by the application... :-|
|
|
//(but because we read all scanlines, it's not really needed)
|
|
cinfo.output_scanline = cinfo.output_height;
|
|
|
|
}
|
|
else
|
|
{
|
|
//MessageBox(g_hWnd, "Only RGB videos are currently supported.", "oops?", MB_OK);
|
|
}
|
|
|
|
jpeg_finish_decompress(&cinfo);
|
|
jpeg_destroy_decompress(&cinfo);
|
|
g_isLoading = false;
|
|
}
|