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wrath-darkplaces/cap_avi.c

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#include "quakedef.h"
#include "cap_avi.h"
#define AVI_MASTER_INDEX_SIZE 640 // GB ought to be enough for anyone
typedef struct capturevideostate_avi_formatspecific_s
{
// AVI stuff
fs_offset_t videofile_firstchunkframes_offset;
fs_offset_t videofile_totalframes_offset1;
fs_offset_t videofile_totalframes_offset2;
fs_offset_t videofile_totalsampleframes_offset;
int videofile_ix_master_audio_inuse;
fs_offset_t videofile_ix_master_audio_inuse_offset;
fs_offset_t videofile_ix_master_audio_start_offset;
int videofile_ix_master_video_inuse;
fs_offset_t videofile_ix_master_video_inuse_offset;
fs_offset_t videofile_ix_master_video_start_offset;
fs_offset_t videofile_ix_movistart;
fs_offset_t position;
qboolean canseek;
sizebuf_t riffbuffer;
unsigned char riffbufferdata[128];
sizebuf_t riffindexbuffer;
int riffstacklevel;
fs_offset_t riffstackstartoffset[4];
fs_offset_t riffstacksizehint[4];
const char *riffstackfourcc[4];
}
capturevideostate_avi_formatspecific_t;
#define LOAD_FORMATSPECIFIC_AVI() capturevideostate_avi_formatspecific_t *format = (capturevideostate_avi_formatspecific_t *) cls.capturevideo.formatspecific
static void SCR_CaptureVideo_RIFF_Start(void)
{
LOAD_FORMATSPECIFIC_AVI();
memset(&format->riffbuffer, 0, sizeof(sizebuf_t));
format->riffbuffer.maxsize = sizeof(format->riffbufferdata);
format->riffbuffer.data = format->riffbufferdata;
format->position = 0;
}
static void SCR_CaptureVideo_RIFF_Flush(void)
{
LOAD_FORMATSPECIFIC_AVI();
if (format->riffbuffer.cursize > 0)
{
if (!FS_Write(cls.capturevideo.videofile, format->riffbuffer.data, format->riffbuffer.cursize))
cls.capturevideo.error = true;
format->position += format->riffbuffer.cursize;
format->riffbuffer.cursize = 0;
format->riffbuffer.overflowed = false;
}
}
static void SCR_CaptureVideo_RIFF_FlushNoIncrease(void)
{
LOAD_FORMATSPECIFIC_AVI();
if (format->riffbuffer.cursize > 0)
{
if (!FS_Write(cls.capturevideo.videofile, format->riffbuffer.data, format->riffbuffer.cursize))
cls.capturevideo.error = true;
format->riffbuffer.cursize = 0;
format->riffbuffer.overflowed = false;
}
}
static void SCR_CaptureVideo_RIFF_WriteBytes(const unsigned char *data, size_t size)
{
LOAD_FORMATSPECIFIC_AVI();
SCR_CaptureVideo_RIFF_Flush();
if (!FS_Write(cls.capturevideo.videofile, data, size))
cls.capturevideo.error = true;
format->position += size;
}
static void SCR_CaptureVideo_RIFF_Write32(int n)
{
LOAD_FORMATSPECIFIC_AVI();
if (format->riffbuffer.cursize + 4 > format->riffbuffer.maxsize)
SCR_CaptureVideo_RIFF_Flush();
MSG_WriteLong(&format->riffbuffer, n);
}
static void SCR_CaptureVideo_RIFF_Write16(int n)
{
LOAD_FORMATSPECIFIC_AVI();
if (format->riffbuffer.cursize + 2 > format->riffbuffer.maxsize)
SCR_CaptureVideo_RIFF_Flush();
MSG_WriteShort(&format->riffbuffer, n);
}
static void SCR_CaptureVideo_RIFF_WriteFourCC(const char *chunkfourcc)
{
LOAD_FORMATSPECIFIC_AVI();
if (format->riffbuffer.cursize + (int)strlen(chunkfourcc) > format->riffbuffer.maxsize)
SCR_CaptureVideo_RIFF_Flush();
MSG_WriteUnterminatedString(&format->riffbuffer, chunkfourcc);
}
static void SCR_CaptureVideo_RIFF_WriteTerminatedString(const char *string)
{
LOAD_FORMATSPECIFIC_AVI();
if (format->riffbuffer.cursize + (int)strlen(string) > format->riffbuffer.maxsize)
SCR_CaptureVideo_RIFF_Flush();
MSG_WriteString(&format->riffbuffer, string);
}
static fs_offset_t SCR_CaptureVideo_RIFF_GetPosition(void)
{
LOAD_FORMATSPECIFIC_AVI();
SCR_CaptureVideo_RIFF_Flush();
//return FS_Tell(cls.capturevideo.videofile);
return format->position;
}
static void SCR_CaptureVideo_RIFF_Push(const char *chunkfourcc, const char *listtypefourcc, fs_offset_t sizeHint)
{
LOAD_FORMATSPECIFIC_AVI();
if (listtypefourcc && sizeHint >= 0)
sizeHint += 4; // size hint is for INNER size
SCR_CaptureVideo_RIFF_WriteFourCC(chunkfourcc);
SCR_CaptureVideo_RIFF_Write32(sizeHint);
SCR_CaptureVideo_RIFF_Flush();
format->riffstacksizehint[format->riffstacklevel] = sizeHint;
format->riffstackstartoffset[format->riffstacklevel] = SCR_CaptureVideo_RIFF_GetPosition();
format->riffstackfourcc[format->riffstacklevel] = chunkfourcc;
++format->riffstacklevel;
if (listtypefourcc)
SCR_CaptureVideo_RIFF_WriteFourCC(listtypefourcc);
}
static void SCR_CaptureVideo_RIFF_Pop(void)
{
LOAD_FORMATSPECIFIC_AVI();
fs_offset_t offset, sizehint;
int x;
unsigned char sizebytes[4];
// write out the chunk size and then return to the current file position
format->riffstacklevel--;
offset = SCR_CaptureVideo_RIFF_GetPosition();
sizehint = format->riffstacksizehint[format->riffstacklevel];
x = (int)(offset - (format->riffstackstartoffset[format->riffstacklevel]));
if(x != sizehint)
{
if(sizehint != -1)
{
int i;
Con_Printf("WARNING: invalid size hint %d when writing video data (actual size: %d)\n", (int) sizehint, x);
for(i = 0; i <= format->riffstacklevel; ++i)
{
Con_Printf(" RIFF level %d = %s\n", i, format->riffstackfourcc[i]);
}
}
sizebytes[0] = (x) & 0xff;sizebytes[1] = (x >> 8) & 0xff;sizebytes[2] = (x >> 16) & 0xff;sizebytes[3] = (x >> 24) & 0xff;
if(FS_Seek(cls.capturevideo.videofile, -(x + 4), SEEK_END) >= 0)
{
FS_Write(cls.capturevideo.videofile, sizebytes, 4);
}
FS_Seek(cls.capturevideo.videofile, 0, SEEK_END);
}
if (offset & 1)
{
SCR_CaptureVideo_RIFF_WriteBytes((unsigned char *) "\0", 1);
}
}
static void GrowBuf(sizebuf_t *buf, int extralen)
{
if(buf->cursize + extralen > buf->maxsize)
{
int oldsize = buf->maxsize;
unsigned char *olddata;
olddata = buf->data;
buf->maxsize = max(buf->maxsize * 2, 4096);
buf->data = (unsigned char *) Mem_Alloc(tempmempool, buf->maxsize);
if(olddata)
{
memcpy(buf->data, olddata, oldsize);
Mem_Free(olddata);
}
}
}
static void SCR_CaptureVideo_RIFF_IndexEntry(const char *chunkfourcc, int chunksize, int flags)
{
LOAD_FORMATSPECIFIC_AVI();
if(!format->canseek)
Sys_Error("SCR_CaptureVideo_RIFF_IndexEntry called on non-seekable AVI");
if (format->riffstacklevel != 2)
Sys_Error("SCR_Capturevideo_RIFF_IndexEntry: RIFF stack level is %i (should be 2)\n", format->riffstacklevel);
GrowBuf(&format->riffindexbuffer, 16);
SCR_CaptureVideo_RIFF_Flush();
MSG_WriteUnterminatedString(&format->riffindexbuffer, chunkfourcc);
MSG_WriteLong(&format->riffindexbuffer, flags);
MSG_WriteLong(&format->riffindexbuffer, (int)FS_Tell(cls.capturevideo.videofile) - format->riffstackstartoffset[1]);
MSG_WriteLong(&format->riffindexbuffer, chunksize);
}
static void SCR_CaptureVideo_RIFF_MakeIxChunk(const char *fcc, const char *dwChunkId, fs_offset_t masteridx_counter, int *masteridx_count, fs_offset_t masteridx_start)
{
LOAD_FORMATSPECIFIC_AVI();
int nMatching;
int i;
fs_offset_t ix = SCR_CaptureVideo_RIFF_GetPosition();
fs_offset_t pos, sz;
if(!format->canseek)
Sys_Error("SCR_CaptureVideo_RIFF_MakeIxChunk called on non-seekable AVI");
if(*masteridx_count >= AVI_MASTER_INDEX_SIZE)
return;
nMatching = 0; // go through index and enumerate them
for(i = 0; i < format->riffindexbuffer.cursize; i += 16)
if(!memcmp(format->riffindexbuffer.data + i, dwChunkId, 4))
++nMatching;
sz = 2+2+4+4+4+4+4;
for(i = 0; i < format->riffindexbuffer.cursize; i += 16)
if(!memcmp(format->riffindexbuffer.data + i, dwChunkId, 4))
sz += 8;
SCR_CaptureVideo_RIFF_Push(fcc, NULL, sz);
SCR_CaptureVideo_RIFF_Write16(2); // wLongsPerEntry
SCR_CaptureVideo_RIFF_Write16(0x0100); // bIndexType=1, bIndexSubType=0
SCR_CaptureVideo_RIFF_Write32(nMatching); // nEntriesInUse
SCR_CaptureVideo_RIFF_WriteFourCC(dwChunkId); // dwChunkId
SCR_CaptureVideo_RIFF_Write32(format->videofile_ix_movistart & (fs_offset_t) 0xFFFFFFFFu);
SCR_CaptureVideo_RIFF_Write32(((fs_offset_t) format->videofile_ix_movistart) >> 32);
SCR_CaptureVideo_RIFF_Write32(0); // dwReserved
for(i = 0; i < format->riffindexbuffer.cursize; i += 16)
if(!memcmp(format->riffindexbuffer.data + i, dwChunkId, 4))
{
unsigned int *p = (unsigned int *) (format->riffindexbuffer.data + i);
unsigned int flags = p[1];
unsigned int rpos = p[2];
unsigned int size = p[3];
size &= ~0x80000000;
if(!(flags & 0x10)) // no keyframe?
size |= 0x80000000;
SCR_CaptureVideo_RIFF_Write32(rpos + 8);
SCR_CaptureVideo_RIFF_Write32(size);
}
SCR_CaptureVideo_RIFF_Flush();
SCR_CaptureVideo_RIFF_Pop();
pos = SCR_CaptureVideo_RIFF_GetPosition();
if(FS_Seek(cls.capturevideo.videofile, masteridx_start + 16 * *masteridx_count, SEEK_SET) >= 0)
{
SCR_CaptureVideo_RIFF_Write32(ix & (fs_offset_t) 0xFFFFFFFFu);
SCR_CaptureVideo_RIFF_Write32(((fs_offset_t) ix) >> 32);
SCR_CaptureVideo_RIFF_Write32(pos - ix);
SCR_CaptureVideo_RIFF_Write32(nMatching);
SCR_CaptureVideo_RIFF_FlushNoIncrease();
}
if(FS_Seek(cls.capturevideo.videofile, masteridx_counter, SEEK_SET) >= 0)
{
SCR_CaptureVideo_RIFF_Write32(++*masteridx_count);
SCR_CaptureVideo_RIFF_FlushNoIncrease();
}
FS_Seek(cls.capturevideo.videofile, 0, SEEK_END); // return value doesn't matter here
}
static void SCR_CaptureVideo_RIFF_Finish(qboolean final)
{
LOAD_FORMATSPECIFIC_AVI();
// close the "movi" list
SCR_CaptureVideo_RIFF_Pop();
if(format->videofile_ix_master_video_inuse_offset)
SCR_CaptureVideo_RIFF_MakeIxChunk("ix00", "00dc", format->videofile_ix_master_video_inuse_offset, &format->videofile_ix_master_video_inuse, format->videofile_ix_master_video_start_offset);
if(format->videofile_ix_master_audio_inuse_offset)
SCR_CaptureVideo_RIFF_MakeIxChunk("ix01", "01wb", format->videofile_ix_master_audio_inuse_offset, &format->videofile_ix_master_audio_inuse, format->videofile_ix_master_audio_start_offset);
// write the idx1 chunk that we've been building while saving the frames (for old style players)
if(final && format->videofile_firstchunkframes_offset)
// TODO replace index creating by OpenDML ix##/##ix/indx chunk so it works for more than one AVI part too
{
SCR_CaptureVideo_RIFF_Push("idx1", NULL, format->riffindexbuffer.cursize);
SCR_CaptureVideo_RIFF_WriteBytes(format->riffindexbuffer.data, format->riffindexbuffer.cursize);
SCR_CaptureVideo_RIFF_Pop();
}
format->riffindexbuffer.cursize = 0;
// pop the RIFF chunk itself
while (format->riffstacklevel > 0)
SCR_CaptureVideo_RIFF_Pop();
SCR_CaptureVideo_RIFF_Flush();
if(format->videofile_firstchunkframes_offset)
{
Con_DPrintf("Finishing first chunk (%d frames)\n", cls.capturevideo.frame);
if(FS_Seek(cls.capturevideo.videofile, format->videofile_firstchunkframes_offset, SEEK_SET) >= 0)
{
SCR_CaptureVideo_RIFF_Write32(cls.capturevideo.frame);
SCR_CaptureVideo_RIFF_FlushNoIncrease();
}
FS_Seek(cls.capturevideo.videofile, 0, SEEK_END);
format->videofile_firstchunkframes_offset = 0;
}
else
Con_DPrintf("Finishing another chunk (%d frames)\n", cls.capturevideo.frame);
}
static void SCR_CaptureVideo_RIFF_OverflowCheck(int framesize)
{
LOAD_FORMATSPECIFIC_AVI();
fs_offset_t cursize;
//fs_offset_t curfilesize;
if (format->riffstacklevel != 2)
Sys_Error("SCR_CaptureVideo_RIFF_OverflowCheck: chunk stack leakage!\n");
if(!format->canseek)
return;
// check where we are in the file
SCR_CaptureVideo_RIFF_Flush();
cursize = SCR_CaptureVideo_RIFF_GetPosition() - format->riffstackstartoffset[0];
//curfilesize = SCR_CaptureVideo_RIFF_GetPosition();
// if this would overflow the windows limit of 1GB per RIFF chunk, we need
// to close the current RIFF chunk and open another for future frames
if (8 + cursize + framesize + format->riffindexbuffer.cursize + 8 + format->riffindexbuffer.cursize + 64 > 1<<30) // note that the Ix buffer takes less space... I just don't dare to / 2 here now... sorry, maybe later
{
SCR_CaptureVideo_RIFF_Finish(false);
// begin a new 1GB extended section of the AVI
SCR_CaptureVideo_RIFF_Push("RIFF", "AVIX", -1);
SCR_CaptureVideo_RIFF_Push("LIST", "movi", -1);
format->videofile_ix_movistart = format->riffstackstartoffset[1];
}
}
// converts from BGRA32 to I420 colorspace (identical to YV12 except chroma plane order is reversed), this colorspace is handled by the Intel(r) 4:2:0 codec on Windows
static void SCR_CaptureVideo_ConvertFrame_BGRA_to_I420_flip(int width, int height, unsigned char *instart, unsigned char *outstart)
{
int x, y;
int blockr, blockg, blockb;
int outoffset = (width/2)*(height/2);
unsigned char *b, *out;
// process one line at a time, and CbCr every other line at 2 pixel intervals
for (y = 0;y < height;y++)
{
// 1x1 Y
for (b = instart + (height-1-y)*width*4, out = outstart + y*width, x = 0;x < width;x++, b += 4, out++)
{
blockr = b[2];
blockg = b[1];
blockb = b[0];
*out = cls.capturevideo.yuvnormalizetable[0][cls.capturevideo.rgbtoyuvscaletable[0][0][blockr] + cls.capturevideo.rgbtoyuvscaletable[0][1][blockg] + cls.capturevideo.rgbtoyuvscaletable[0][2][blockb]];
}
if ((y & 1) == 0 && y/2 < height/2) // if h is odd, this skips the last row
{
// 2x2 Cr and Cb planes
int inpitch = width*4;
for (b = instart + (height-2-y)*width*4, out = outstart + width*height + (y/2)*(width/2), x = 0;x < width/2;x++, b += 8, out++)
{
blockr = (b[2] + b[6] + b[inpitch+2] + b[inpitch+6]) >> 2;
blockg = (b[1] + b[5] + b[inpitch+1] + b[inpitch+5]) >> 2;
blockb = (b[0] + b[4] + b[inpitch+0] + b[inpitch+4]) >> 2;
// Cr
out[0 ] = cls.capturevideo.yuvnormalizetable[1][cls.capturevideo.rgbtoyuvscaletable[1][0][blockr] + cls.capturevideo.rgbtoyuvscaletable[1][1][blockg] + cls.capturevideo.rgbtoyuvscaletable[1][2][blockb] + 128];
// Cb
out[outoffset] = cls.capturevideo.yuvnormalizetable[2][cls.capturevideo.rgbtoyuvscaletable[2][0][blockr] + cls.capturevideo.rgbtoyuvscaletable[2][1][blockg] + cls.capturevideo.rgbtoyuvscaletable[2][2][blockb] + 128];
}
}
}
}
static void SCR_CaptureVideo_Avi_VideoFrames(int num)
{
LOAD_FORMATSPECIFIC_AVI();
int x = 0, width = cls.capturevideo.width, height = cls.capturevideo.height;
unsigned char *in, *out;
// FIXME: width/height must be multiple of 2, enforce this?
in = cls.capturevideo.outbuffer;
out = cls.capturevideo.outbuffer + width*height*4;
SCR_CaptureVideo_ConvertFrame_BGRA_to_I420_flip(width, height, in, out);
x = width*height+(width/2)*(height/2)*2;
while(num-- > 0)
{
if(format->canseek)
{
SCR_CaptureVideo_RIFF_OverflowCheck(8 + x);
SCR_CaptureVideo_RIFF_IndexEntry("00dc", x, 0x10); // AVIIF_KEYFRAME
}
if(!format->canseek)
{
SCR_CaptureVideo_RIFF_Push("RIFF", "AVIX", 12+8+x);
SCR_CaptureVideo_RIFF_Push("LIST", "movi", 8+x);
}
SCR_CaptureVideo_RIFF_Push("00dc", NULL, x);
SCR_CaptureVideo_RIFF_WriteBytes(out, x);
SCR_CaptureVideo_RIFF_Pop();
if(!format->canseek)
{
SCR_CaptureVideo_RIFF_Pop();
SCR_CaptureVideo_RIFF_Pop();
}
}
}
static void SCR_CaptureVideo_Avi_EndVideo(void)
{
LOAD_FORMATSPECIFIC_AVI();
if(format->canseek)
{
// close any open chunks
SCR_CaptureVideo_RIFF_Finish(true);
// go back and fix the video frames and audio samples fields
if(format->videofile_totalframes_offset1)
if(FS_Seek(cls.capturevideo.videofile, format->videofile_totalframes_offset1, SEEK_SET) >= 0)
{
SCR_CaptureVideo_RIFF_Write32(cls.capturevideo.frame);
SCR_CaptureVideo_RIFF_FlushNoIncrease();
}
if(format->videofile_totalframes_offset2)
if(FS_Seek(cls.capturevideo.videofile, format->videofile_totalframes_offset2, SEEK_SET) >= 0)
{
SCR_CaptureVideo_RIFF_Write32(cls.capturevideo.frame);
SCR_CaptureVideo_RIFF_FlushNoIncrease();
}
if (cls.capturevideo.soundrate)
{
if(format->videofile_totalsampleframes_offset)
if(FS_Seek(cls.capturevideo.videofile, format->videofile_totalsampleframes_offset, SEEK_SET) >= 0)
{
SCR_CaptureVideo_RIFF_Write32(cls.capturevideo.soundsampleframe);
SCR_CaptureVideo_RIFF_FlushNoIncrease();
}
}
}
if (format->riffindexbuffer.data)
{
Mem_Free(format->riffindexbuffer.data);
format->riffindexbuffer.data = NULL;
}
FS_Close(cls.capturevideo.videofile);
cls.capturevideo.videofile = NULL;
Mem_Free(format);
}
static void SCR_CaptureVideo_Avi_SoundFrame(const portable_sampleframe_t *paintbuffer, size_t length)
{
LOAD_FORMATSPECIFIC_AVI();
int x;
unsigned char bufstereo16le[PAINTBUFFER_SIZE * 4];
unsigned char* out_ptr;
size_t i;
// write the sound buffer as little endian 16bit interleaved stereo
for(i = 0, out_ptr = bufstereo16le; i < length; i++, out_ptr += 4)
{
int n0, n1;
n0 = paintbuffer[i].sample[0] * 32768.0f;
n0 = bound(-32768, n0, 32767);
out_ptr[0] = (unsigned char)n0;
out_ptr[1] = (unsigned char)(n0 >> 8);
n1 = paintbuffer[i].sample[1] * 32768.0f;
n1 = bound(-32768, n1, 32767);
out_ptr[2] = (unsigned char)n1;
out_ptr[3] = (unsigned char)(n1 >> 8);
}
x = length*4;
if(format->canseek)
{
SCR_CaptureVideo_RIFF_OverflowCheck(8 + x);
SCR_CaptureVideo_RIFF_IndexEntry("01wb", x, 0x10); // AVIIF_KEYFRAME
}
if(!format->canseek)
{
SCR_CaptureVideo_RIFF_Push("RIFF", "AVIX", 12+8+x);
SCR_CaptureVideo_RIFF_Push("LIST", "movi", 8+x);
}
SCR_CaptureVideo_RIFF_Push("01wb", NULL, x);
SCR_CaptureVideo_RIFF_WriteBytes(bufstereo16le, x);
SCR_CaptureVideo_RIFF_Pop();
if(!format->canseek)
{
SCR_CaptureVideo_RIFF_Pop();
SCR_CaptureVideo_RIFF_Pop();
}
}
void SCR_CaptureVideo_Avi_BeginVideo(void)
{
int width = cls.capturevideo.width;
int height = cls.capturevideo.height;
int n, d;
unsigned int i;
double aspect;
char vabuf[1024];
aspect = vid.width / (vid.height * vid_pixelheight.value);
cls.capturevideo.format = CAPTUREVIDEOFORMAT_AVI_I420;
cls.capturevideo.formatextension = "avi";
cls.capturevideo.videofile = FS_OpenRealFile(va(vabuf, sizeof(vabuf), "%s.%s", cls.capturevideo.basename, cls.capturevideo.formatextension), "wb", false);
cls.capturevideo.endvideo = SCR_CaptureVideo_Avi_EndVideo;
cls.capturevideo.videoframes = SCR_CaptureVideo_Avi_VideoFrames;
cls.capturevideo.soundframe = SCR_CaptureVideo_Avi_SoundFrame;
cls.capturevideo.formatspecific = Mem_Alloc(tempmempool, sizeof(capturevideostate_avi_formatspecific_t));
{
LOAD_FORMATSPECIFIC_AVI();
format->canseek = (FS_Seek(cls.capturevideo.videofile, 0, SEEK_SET) == 0);
SCR_CaptureVideo_RIFF_Start();
// enclosing RIFF chunk (there can be multiple of these in >1GB files, the later ones are "AVIX" instead of "AVI " and have no header/stream info)
SCR_CaptureVideo_RIFF_Push("RIFF", "AVI ", format->canseek ? -1 : 12+(8+56+12+(12+52+8+40+8+68)+(cls.capturevideo.soundrate?(12+12+52+8+18):0)+12+(8+4))+12+(8+(((int) strlen(engineversion) | 1) + 1))+12);
// AVI main header
SCR_CaptureVideo_RIFF_Push("LIST", "hdrl", format->canseek ? -1 : 8+56+12+(12+52+8+40+8+68)+(cls.capturevideo.soundrate?(12+12+52+8+18):0)+12+(8+4));
SCR_CaptureVideo_RIFF_Push("avih", NULL, 56);
SCR_CaptureVideo_RIFF_Write32((int)(1000000.0 / (cls.capturevideo.framerate / cls.capturevideo.framestep))); // microseconds per frame
SCR_CaptureVideo_RIFF_Write32(0); // max bytes per second
SCR_CaptureVideo_RIFF_Write32(0); // padding granularity
SCR_CaptureVideo_RIFF_Write32(0x910); // flags (AVIF_HASINDEX | AVIF_ISINTERLEAVED | AVIF_TRUSTCKTYPE)
format->videofile_firstchunkframes_offset = SCR_CaptureVideo_RIFF_GetPosition();
SCR_CaptureVideo_RIFF_Write32(0); // total frames
SCR_CaptureVideo_RIFF_Write32(0); // initial frames
if (cls.capturevideo.soundrate)
SCR_CaptureVideo_RIFF_Write32(2); // number of streams
else
SCR_CaptureVideo_RIFF_Write32(1); // number of streams
SCR_CaptureVideo_RIFF_Write32(0); // suggested buffer size
SCR_CaptureVideo_RIFF_Write32(width); // width
SCR_CaptureVideo_RIFF_Write32(height); // height
SCR_CaptureVideo_RIFF_Write32(0); // reserved[0]
SCR_CaptureVideo_RIFF_Write32(0); // reserved[1]
SCR_CaptureVideo_RIFF_Write32(0); // reserved[2]
SCR_CaptureVideo_RIFF_Write32(0); // reserved[3]
SCR_CaptureVideo_RIFF_Pop();
// video stream info
SCR_CaptureVideo_RIFF_Push("LIST", "strl", format->canseek ? -1 : 12+52+8+40+8+68);
SCR_CaptureVideo_RIFF_Push("strh", "vids", 52);
SCR_CaptureVideo_RIFF_WriteFourCC("I420"); // stream fourcc (I420 colorspace, uncompressed)
SCR_CaptureVideo_RIFF_Write32(0); // flags
SCR_CaptureVideo_RIFF_Write16(0); // priority
SCR_CaptureVideo_RIFF_Write16(0); // language
SCR_CaptureVideo_RIFF_Write32(0); // initial frames
// find an ideal divisor for the framerate
FindFraction(cls.capturevideo.framerate / cls.capturevideo.framestep, &n, &d, 1000);
SCR_CaptureVideo_RIFF_Write32(d); // samples/second divisor
SCR_CaptureVideo_RIFF_Write32(n); // samples/second multiplied by divisor
SCR_CaptureVideo_RIFF_Write32(0); // start
format->videofile_totalframes_offset1 = SCR_CaptureVideo_RIFF_GetPosition();
SCR_CaptureVideo_RIFF_Write32(0xFFFFFFFF); // length
SCR_CaptureVideo_RIFF_Write32(width*height+(width/2)*(height/2)*2); // suggested buffer size
SCR_CaptureVideo_RIFF_Write32(0); // quality
SCR_CaptureVideo_RIFF_Write32(0); // sample size
SCR_CaptureVideo_RIFF_Write16(0); // frame left
SCR_CaptureVideo_RIFF_Write16(0); // frame top
SCR_CaptureVideo_RIFF_Write16(width); // frame right
SCR_CaptureVideo_RIFF_Write16(height); // frame bottom
SCR_CaptureVideo_RIFF_Pop();
// video stream format
SCR_CaptureVideo_RIFF_Push("strf", NULL, 40);
SCR_CaptureVideo_RIFF_Write32(40); // BITMAPINFO struct size
SCR_CaptureVideo_RIFF_Write32(width); // width
SCR_CaptureVideo_RIFF_Write32(height); // height
SCR_CaptureVideo_RIFF_Write16(3); // planes
SCR_CaptureVideo_RIFF_Write16(12); // bitcount
SCR_CaptureVideo_RIFF_WriteFourCC("I420"); // compression
SCR_CaptureVideo_RIFF_Write32(width*height+(width/2)*(height/2)*2); // size of image
SCR_CaptureVideo_RIFF_Write32(0); // x pixels per meter
SCR_CaptureVideo_RIFF_Write32(0); // y pixels per meter
SCR_CaptureVideo_RIFF_Write32(0); // color used
SCR_CaptureVideo_RIFF_Write32(0); // color important
SCR_CaptureVideo_RIFF_Pop();
// master index
if(format->canseek)
{
SCR_CaptureVideo_RIFF_Push("indx", NULL, -1);
SCR_CaptureVideo_RIFF_Write16(4); // wLongsPerEntry
SCR_CaptureVideo_RIFF_Write16(0); // bIndexSubType=0, bIndexType=0
format->videofile_ix_master_video_inuse_offset = SCR_CaptureVideo_RIFF_GetPosition();
SCR_CaptureVideo_RIFF_Write32(0); // nEntriesInUse
SCR_CaptureVideo_RIFF_WriteFourCC("00dc"); // dwChunkId
SCR_CaptureVideo_RIFF_Write32(0); // dwReserved1
SCR_CaptureVideo_RIFF_Write32(0); // dwReserved2
SCR_CaptureVideo_RIFF_Write32(0); // dwReserved3
format->videofile_ix_master_video_start_offset = SCR_CaptureVideo_RIFF_GetPosition();
for(i = 0; i < AVI_MASTER_INDEX_SIZE * 4; ++i)
SCR_CaptureVideo_RIFF_Write32(0); // fill up later
SCR_CaptureVideo_RIFF_Pop();
}
// extended format (aspect!)
SCR_CaptureVideo_RIFF_Push("vprp", NULL, 68);
SCR_CaptureVideo_RIFF_Write32(0); // VideoFormatToken
SCR_CaptureVideo_RIFF_Write32(0); // VideoStandard
SCR_CaptureVideo_RIFF_Write32((int)(cls.capturevideo.framerate / cls.capturevideo.framestep)); // dwVerticalRefreshRate (bogus)
SCR_CaptureVideo_RIFF_Write32(width); // dwHTotalInT
SCR_CaptureVideo_RIFF_Write32(height); // dwVTotalInLines
FindFraction(aspect, &n, &d, 1000);
SCR_CaptureVideo_RIFF_Write32((n << 16) | d); // dwFrameAspectRatio // TODO a word
SCR_CaptureVideo_RIFF_Write32(width); // dwFrameWidthInPixels
SCR_CaptureVideo_RIFF_Write32(height); // dwFrameHeightInLines
SCR_CaptureVideo_RIFF_Write32(1); // nFieldPerFrame
SCR_CaptureVideo_RIFF_Write32(width); // CompressedBMWidth
SCR_CaptureVideo_RIFF_Write32(height); // CompressedBMHeight
SCR_CaptureVideo_RIFF_Write32(width); // ValidBMHeight
SCR_CaptureVideo_RIFF_Write32(height); // ValidBMWidth
SCR_CaptureVideo_RIFF_Write32(0); // ValidBMXOffset
SCR_CaptureVideo_RIFF_Write32(0); // ValidBMYOffset
SCR_CaptureVideo_RIFF_Write32(0); // ValidBMXOffsetInT
SCR_CaptureVideo_RIFF_Write32(0); // ValidBMYValidStartLine
SCR_CaptureVideo_RIFF_Pop();
SCR_CaptureVideo_RIFF_Pop();
if (cls.capturevideo.soundrate)
{
// audio stream info
SCR_CaptureVideo_RIFF_Push("LIST", "strl", format->canseek ? -1 : 12+52+8+18);
SCR_CaptureVideo_RIFF_Push("strh", "auds", 52);
SCR_CaptureVideo_RIFF_Write32(1); // stream fourcc (PCM audio, uncompressed)
SCR_CaptureVideo_RIFF_Write32(0); // flags
SCR_CaptureVideo_RIFF_Write16(0); // priority
SCR_CaptureVideo_RIFF_Write16(0); // language
SCR_CaptureVideo_RIFF_Write32(0); // initial frames
SCR_CaptureVideo_RIFF_Write32(1); // samples/second divisor
SCR_CaptureVideo_RIFF_Write32((int)(cls.capturevideo.soundrate)); // samples/second multiplied by divisor
SCR_CaptureVideo_RIFF_Write32(0); // start
format->videofile_totalsampleframes_offset = SCR_CaptureVideo_RIFF_GetPosition();
SCR_CaptureVideo_RIFF_Write32(0xFFFFFFFF); // length
SCR_CaptureVideo_RIFF_Write32(cls.capturevideo.soundrate * 2); // suggested buffer size (this is a half second)
SCR_CaptureVideo_RIFF_Write32(0); // quality
SCR_CaptureVideo_RIFF_Write32(4); // sample size
SCR_CaptureVideo_RIFF_Write16(0); // frame left
SCR_CaptureVideo_RIFF_Write16(0); // frame top
SCR_CaptureVideo_RIFF_Write16(0); // frame right
SCR_CaptureVideo_RIFF_Write16(0); // frame bottom
SCR_CaptureVideo_RIFF_Pop();
// audio stream format
SCR_CaptureVideo_RIFF_Push("strf", NULL, 18);
SCR_CaptureVideo_RIFF_Write16(1); // format (uncompressed PCM?)
SCR_CaptureVideo_RIFF_Write16(2); // channels (stereo)
SCR_CaptureVideo_RIFF_Write32(cls.capturevideo.soundrate); // sampleframes per second
SCR_CaptureVideo_RIFF_Write32(cls.capturevideo.soundrate * 4); // average bytes per second
SCR_CaptureVideo_RIFF_Write16(4); // block align
SCR_CaptureVideo_RIFF_Write16(16); // bits per sample
SCR_CaptureVideo_RIFF_Write16(0); // size
SCR_CaptureVideo_RIFF_Pop();
// master index
if(format->canseek)
{
SCR_CaptureVideo_RIFF_Push("indx", NULL, -1);
SCR_CaptureVideo_RIFF_Write16(4); // wLongsPerEntry
SCR_CaptureVideo_RIFF_Write16(0); // bIndexSubType=0, bIndexType=0
format->videofile_ix_master_audio_inuse_offset = SCR_CaptureVideo_RIFF_GetPosition();
SCR_CaptureVideo_RIFF_Write32(0); // nEntriesInUse
SCR_CaptureVideo_RIFF_WriteFourCC("01wb"); // dwChunkId
SCR_CaptureVideo_RIFF_Write32(0); // dwReserved1
SCR_CaptureVideo_RIFF_Write32(0); // dwReserved2
SCR_CaptureVideo_RIFF_Write32(0); // dwReserved3
format->videofile_ix_master_audio_start_offset = SCR_CaptureVideo_RIFF_GetPosition();
for(i = 0; i < AVI_MASTER_INDEX_SIZE * 4; ++i)
SCR_CaptureVideo_RIFF_Write32(0); // fill up later
SCR_CaptureVideo_RIFF_Pop();
}
SCR_CaptureVideo_RIFF_Pop();
}
format->videofile_ix_master_audio_inuse = format->videofile_ix_master_video_inuse = 0;
// extended header (for total #frames)
SCR_CaptureVideo_RIFF_Push("LIST", "odml", 8+4);
SCR_CaptureVideo_RIFF_Push("dmlh", NULL, 4);
format->videofile_totalframes_offset2 = SCR_CaptureVideo_RIFF_GetPosition();
SCR_CaptureVideo_RIFF_Write32(0xFFFFFFFF);
SCR_CaptureVideo_RIFF_Pop();
SCR_CaptureVideo_RIFF_Pop();
// close the AVI header list
SCR_CaptureVideo_RIFF_Pop();
// software that produced this AVI video file
SCR_CaptureVideo_RIFF_Push("LIST", "INFO", 8+((strlen(engineversion) | 1) + 1));
SCR_CaptureVideo_RIFF_Push("ISFT", NULL, strlen(engineversion) + 1);
SCR_CaptureVideo_RIFF_WriteTerminatedString(engineversion);
SCR_CaptureVideo_RIFF_Pop();
// enable this junk filler if you like the LIST movi to always begin at 4KB in the file (why?)
#if 0
SCR_CaptureVideo_RIFF_Push("JUNK", NULL);
x = 4096 - SCR_CaptureVideo_RIFF_GetPosition();
while (x > 0)
{
const char *junkfiller = "[ DarkPlaces junk data ]";
int i = min(x, (int)strlen(junkfiller));
SCR_CaptureVideo_RIFF_WriteBytes((const unsigned char *)junkfiller, i);
x -= i;
}
SCR_CaptureVideo_RIFF_Pop();
#endif
SCR_CaptureVideo_RIFF_Pop();
// begin the actual video section now
SCR_CaptureVideo_RIFF_Push("LIST", "movi", format->canseek ? -1 : 0);
format->videofile_ix_movistart = format->riffstackstartoffset[1];
// we're done with the headers now...
SCR_CaptureVideo_RIFF_Flush();
if (format->riffstacklevel != 2)
Sys_Error("SCR_CaptureVideo_BeginVideo: broken AVI writing code (stack level is %i (should be 2) at end of headers)\n", format->riffstacklevel);
if(!format->canseek)
{
// close the movi immediately
SCR_CaptureVideo_RIFF_Pop();
// close the AVI immediately (we'll put all frames into AVIX)
SCR_CaptureVideo_RIFF_Pop();
}
}
}
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