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mpv/libmpdemux/aviheader.c

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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include "config.h"
#include "mp_msg.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"
#include "bswap.h"
#include "aviheader.h"
#define MIN(a,b) (((a)<(b))?(a):(b))
static MainAVIHeader avih;
extern void print_avih(MainAVIHeader *h);
extern void print_avih_flags(MainAVIHeader *h);
extern void print_strh(AVIStreamHeader *h);
extern void print_wave_header(WAVEFORMATEX *h);
extern void print_video_header(BITMAPINFOHEADER *h);
extern void print_index(AVIINDEXENTRY *idx,int idx_size);
extern void print_avistdindex_chunk(avistdindex_chunk *h);
extern void print_avisuperindex_chunk(avisuperindex_chunk *h);
extern void print_vprp(VideoPropHeader *vprp);
static int odml_get_vstream_id(int id, unsigned char res[])
{
unsigned char *p = (unsigned char *)&id;
id = le2me_32(id);
if (p[2] == 'd') {
if (res) {
res[0] = p[0];
res[1] = p[1];
}
return 1;
}
return 0;
}
/*
* Simple quicksort for AVIINDEXENTRYs
*/
static void avi_idx_quicksort(AVIINDEXENTRY *idx, int from, int to)
{
AVIINDEXENTRY temp;
int lo = to;
int hi = from;
off_t pivot_ofs = AVI_IDX_OFFSET(&idx[(from + to) / 2]);
do {
while(pivot_ofs < AVI_IDX_OFFSET(&idx[lo])) lo--;
while(pivot_ofs > AVI_IDX_OFFSET(&idx[hi])) hi++;
if(hi <= lo) {
if (hi != lo) {
memcpy(&temp, &idx[lo], sizeof(temp));
memcpy(&idx[lo], &idx[hi], sizeof(temp));
memcpy(&idx[hi], &temp, sizeof(temp));
}
lo--; hi++;
}
} while (lo >= hi);
if (from < lo) avi_idx_quicksort(idx, from, lo);
if (to > hi) avi_idx_quicksort(idx, hi, to);
}
void read_avi_header(demuxer_t *demuxer,int index_mode){
sh_audio_t *sh_audio=NULL;
sh_video_t *sh_video=NULL;
int stream_id=-1;
int idxfix_videostream=0;
int idxfix_divx=0;
avi_priv_t* priv=demuxer->priv;
off_t list_end=0;
//---- AVI header:
priv->idx_size=0;
priv->audio_streams=0;
while(1){
int id=stream_read_dword_le(demuxer->stream);
unsigned chunksize,size2;
static int last_fccType=0;
char* hdr=NULL;
//
if(stream_eof(demuxer->stream)) break;
// Imply -forceidx if -saveidx is specified
if (index_file_save)
index_mode = 2;
//
if(id==mmioFOURCC('L','I','S','T')){
unsigned len=stream_read_dword_le(demuxer->stream); // list size
id=stream_read_dword_le(demuxer->stream); // list type
mp_msg(MSGT_HEADER,MSGL_DBG2,"LIST %.4s len=%u\n",(char *) &id,len);
if(len >= 4) {
len -= 4;
list_end=stream_tell(demuxer->stream)+((len+1)&(~1));
} else {
mp_msg(MSGT_HEADER,MSGL_WARN,"** empty list?!\n");
list_end = 0;
}
mp_msg(MSGT_HEADER,MSGL_V,"list_end=0x%X\n",(int)list_end);
if(id==listtypeAVIMOVIE){
// found MOVI header
if(!demuxer->movi_start) demuxer->movi_start=stream_tell(demuxer->stream);
demuxer->movi_end=stream_tell(demuxer->stream)+len;
mp_msg(MSGT_HEADER,MSGL_V,"Found movie at 0x%X - 0x%X\n",(int)demuxer->movi_start,(int)demuxer->movi_end);
if(demuxer->stream->end_pos>demuxer->movi_end) demuxer->movi_end=demuxer->stream->end_pos;
if(index_mode==-2 || index_mode==2 || index_mode==0)
break; // reading from non-seekable source (stdin) or forced index or no index forced
if(list_end>0) stream_seek(demuxer->stream,list_end); // skip movi
list_end=0;
}
continue;
}
size2=stream_read_dword_le(demuxer->stream);
mp_msg(MSGT_HEADER,MSGL_DBG2,"CHUNK %.4s len=%u\n",(char *) &id,size2);
chunksize=(size2+1)&(~1);
switch(id){
// Indicates where the subject of the file is archived
case mmioFOURCC('I','A','R','L'): hdr="Archival Location";break;
// Lists the artist of the original subject of the file;
// for example, "Michaelangelo."
case mmioFOURCC('I','A','R','T'): hdr="Artist";break;
// Lists the name of the person or organization that commissioned
// the subject of the file; for example "Pope Julian II."
case mmioFOURCC('I','C','M','S'): hdr="Commissioned";break;
// Provides general comments about the file or the subject
// of the file. If the comment is several sentences long, end each
// sentence with a period. Do not include new-line characters.
case mmioFOURCC('I','C','M','T'): hdr="Comments";break;
// Records the copyright information for the file; for example,
// "Copyright Encyclopedia International 1991." If there are multiple
// copyrights, separate them by semicolon followed by a space.
case mmioFOURCC('I','C','O','P'): hdr="Copyright";break;
// Describes whether an image has been cropped and, if so, how it
// was cropped; for example, "lower-right corner."
case mmioFOURCC('I','C','R','D'): hdr="Creation Date";break;
// Describes whether an image has been cropped and, if so, how it
// was cropped; for example, "lower-right corner."
case mmioFOURCC('I','C','R','P'): hdr="Cropped";break;
// Specifies the size of the original subject of the file; for
// example, "8.5 in h, 11 in w."
case mmioFOURCC('I','D','I','M'): hdr="Dimensions";break;
// Stores dots per inch setting of the digitizer used to
// produce the file, such as "300."
case mmioFOURCC('I','D','P','I'): hdr="Dots Per Inch";break;
// Stores the of the engineer who worked on the file. If there are
// multiple engineers, separate the names by a semicolon and a blank;
// for example, "Smith, John; Adams, Joe."
case mmioFOURCC('I','E','N','G'): hdr="Engineer";break;
// Describes the original work, such as "landscape,", "portrait,"
// "still liefe," etc.
case mmioFOURCC('I','G','N','R'): hdr="Genre";break;
// Provides a list of keywords that refer to the file or subject of the
// file. Separate multiple keywords with a semicolon and a blank;
// for example, "Seattle, aerial view; scenery."
case mmioFOURCC('I','K','E','Y'): hdr="Keywords";break;
// ILGT - Describes the changes in the lightness settings on the digitizer
// required to produce the file. Note that the format of this information
// depends on the hardware used.
case mmioFOURCC('I','L','G','T'): hdr="Lightness";break;
// IMED - Decribes the original subject of the file, such as
// "computer image," "drawing," "lithograph," and so on.
case mmioFOURCC('I','M','E','D'): hdr="Medium";break;
// INAM - Stores the title of the subject of the file, such as
// "Seattle from Above."
case mmioFOURCC('I','N','A','M'): hdr="Name";break;
// IPLT - Specifies the number of colors requested when digitizing
// an image, such as "256."
case mmioFOURCC('I','P','L','T'): hdr="Palette Setting";break;
// IPRD - Specifies the name of title the file was originally intended
// for, such as "Encyclopedia of Pacific Northwest Geography."
case mmioFOURCC('I','P','R','D'): hdr="Product";break;
// ISBJ - Decsribes the contents of the file, such as
// "Aerial view of Seattle."
case mmioFOURCC('I','S','B','J'): hdr="Subject";break;
// ISFT - Identifies the name of the software packages used to create the
// file, such as "Microsoft WaveEdit"
case mmioFOURCC('I','S','F','T'): hdr="Software";break;
// ISHP - Identifies the change in sharpness for the digitizer
// required to produce the file (the format depends on the hardware used).
case mmioFOURCC('I','S','H','P'): hdr="Sharpness";break;
// ISRC - Identifies the name of the person or organization who
// suplied the original subject of the file; for example, "Try Research."
case mmioFOURCC('I','S','R','C'): hdr="Source";break;
// ISRF - Identifies the original form of the material that was digitized,
// such as "slide," "paper," "map," and so on. This is not necessarily
// the same as IMED
case mmioFOURCC('I','S','R','F'): hdr="Source Form";break;
// ITCH - Identifies the technician who digitized the subject file;
// for example, "Smith, John."
case mmioFOURCC('I','T','C','H'): hdr="Technician";break;
case mmioFOURCC('I','S','M','P'): hdr="Time Code";break;
case mmioFOURCC('I','D','I','T'): hdr="Digitization Time";break;
case ckidAVIMAINHDR: // read 'avih'
stream_read(demuxer->stream,(char*) &avih,MIN(size2,sizeof(avih)));
le2me_MainAVIHeader(&avih); // swap to machine endian
chunksize-=MIN(size2,sizeof(avih));
if(verbose>0) print_avih(&avih); // else print_avih_flags(&avih);
break;
case ckidSTREAMHEADER: { // read 'strh'
AVIStreamHeader h;
stream_read(demuxer->stream,(char*) &h,MIN(size2,sizeof(h)));
le2me_AVIStreamHeader(&h); // swap to machine endian
chunksize-=MIN(size2,sizeof(h));
++stream_id;
if(h.fccType==streamtypeVIDEO){
sh_video=new_sh_video(demuxer,stream_id);
memcpy(&sh_video->video,&h,sizeof(h));
} else
if(h.fccType==streamtypeAUDIO){
sh_audio=new_sh_audio(demuxer,stream_id);
memcpy(&sh_audio->audio,&h,sizeof(h));
}
last_fccType=h.fccType;
if(verbose>=1) print_strh(&h);
break; }
case mmioFOURCC('i', 'n', 'd', 'x'): {
uint32_t i;
unsigned msize = 0;
avisuperindex_chunk *s;
priv->suidx_size++;
priv->suidx = realloc(priv->suidx, priv->suidx_size * sizeof (avisuperindex_chunk));
s = &priv->suidx[priv->suidx_size-1];
chunksize-=24;
memcpy(s->fcc, "indx", 4);
s->dwSize = size2;
s->wLongsPerEntry = stream_read_word_le(demuxer->stream);
s->bIndexSubType = stream_read_char(demuxer->stream);
s->bIndexType = stream_read_char(demuxer->stream);
s->nEntriesInUse = stream_read_dword_le(demuxer->stream);
*(uint32_t *)s->dwChunkId = stream_read_dword_le(demuxer->stream);
stream_read(demuxer->stream, (char *)s->dwReserved, 3*4);
memset(s->dwReserved, 0, 3*4);
print_avisuperindex_chunk(s);
msize = sizeof (uint32_t) * s->wLongsPerEntry * s->nEntriesInUse;
s->aIndex = malloc(msize);
memset (s->aIndex, 0, msize);
s->stdidx = malloc (s->nEntriesInUse * sizeof (avistdindex_chunk));
memset (s->stdidx, 0, s->nEntriesInUse * sizeof (avistdindex_chunk));
// now the real index of indices
for (i=0; i<s->nEntriesInUse; i++) {
chunksize-=16;
s->aIndex[i].qwOffset = stream_read_dword_le(demuxer->stream) & 0xffffffff;
s->aIndex[i].qwOffset |= ((uint64_t)stream_read_dword_le(demuxer->stream) & 0xffffffff)<<32;
s->aIndex[i].dwSize = stream_read_dword_le(demuxer->stream);
s->aIndex[i].dwDuration = stream_read_dword_le(demuxer->stream);
mp_msg (MSGT_HEADER, MSGL_V, "ODML (%.4s): [%d] 0x%016llx 0x%04lx %ld\n",
(s->dwChunkId), i,
(uint64_t)s->aIndex[i].qwOffset, s->aIndex[i].dwSize, s->aIndex[i].dwDuration);
}
break; }
case ckidSTREAMFORMAT: { // read 'strf'
if(last_fccType==streamtypeVIDEO){
sh_video->bih=calloc((chunksize<sizeof(BITMAPINFOHEADER))?sizeof(BITMAPINFOHEADER):chunksize,1);
// sh_video->bih=malloc(chunksize); memset(sh_video->bih,0,chunksize);
mp_msg(MSGT_HEADER,MSGL_V,"found 'bih', %u bytes of %d\n",chunksize,sizeof(BITMAPINFOHEADER));
stream_read(demuxer->stream,(char*) sh_video->bih,chunksize);
le2me_BITMAPINFOHEADER(sh_video->bih); // swap to machine endian
// fixup MS-RLE header (seems to be broken for <256 color files)
if(sh_video->bih->biCompression<=1 && sh_video->bih->biSize==40)
sh_video->bih->biSize=chunksize;
if(verbose>=1) print_video_header(sh_video->bih);
chunksize=0;
// sh_video->fps=(float)sh_video->video.dwRate/(float)sh_video->video.dwScale;
// sh_video->frametime=(float)sh_video->video.dwScale/(float)sh_video->video.dwRate;
// if(demuxer->video->id==-1) demuxer->video->id=stream_id;
// IdxFix:
idxfix_videostream=stream_id;
switch(sh_video->bih->biCompression){
case mmioFOURCC('M', 'P', 'G', '4'):
case mmioFOURCC('m', 'p', 'g', '4'):
case mmioFOURCC('D', 'I', 'V', '1'):
idxfix_divx=3; // set index recovery mpeg4 flavour: msmpeg4v1
mp_msg(MSGT_HEADER,MSGL_V,"Regenerating keyframe table for M$ mpg4v1 video\n");
break;
case mmioFOURCC('D', 'I', 'V', '3'):
case mmioFOURCC('d', 'i', 'v', '3'):
case mmioFOURCC('D', 'I', 'V', '4'):
case mmioFOURCC('d', 'i', 'v', '4'):
case mmioFOURCC('D', 'I', 'V', '5'):
case mmioFOURCC('d', 'i', 'v', '5'):
case mmioFOURCC('D', 'I', 'V', '6'):
case mmioFOURCC('d', 'i', 'v', '6'):
case mmioFOURCC('M', 'P', '4', '3'):
case mmioFOURCC('m', 'p', '4', '3'):
case mmioFOURCC('M', 'P', '4', '2'):
case mmioFOURCC('m', 'p', '4', '2'):
case mmioFOURCC('D', 'I', 'V', '2'):
case mmioFOURCC('A', 'P', '4', '1'):
idxfix_divx=1; // set index recovery mpeg4 flavour: msmpeg4v3
mp_msg(MSGT_HEADER,MSGL_V,"Regenerating keyframe table for DIVX3 video\n");
break;
case mmioFOURCC('D', 'I', 'V', 'X'):
case mmioFOURCC('d', 'i', 'v', 'x'):
case mmioFOURCC('D', 'X', '5', '0'):
case mmioFOURCC('X', 'V', 'I', 'D'):
case mmioFOURCC('x', 'v', 'i', 'd'):
idxfix_divx=2; // set index recovery mpeg4 flavour: generic mpeg4
mp_msg(MSGT_HEADER,MSGL_V,"Regenerating keyframe table for MPEG4 video\n");
break;
}
} else
if(last_fccType==streamtypeAUDIO){
unsigned wf_size = chunksize<sizeof(WAVEFORMATEX)?sizeof(WAVEFORMATEX):chunksize;
sh_audio->wf=calloc(wf_size,1);
// sh_audio->wf=malloc(chunksize); memset(sh_audio->wf,0,chunksize);
mp_msg(MSGT_HEADER,MSGL_V,"found 'wf', %d bytes of %d\n",chunksize,sizeof(WAVEFORMATEX));
stream_read(demuxer->stream,(char*) sh_audio->wf,chunksize);
le2me_WAVEFORMATEX(sh_audio->wf);
if (sh_audio->wf->cbSize != 0 &&
wf_size < sizeof(WAVEFORMATEX)+sh_audio->wf->cbSize) {
sh_audio->wf=realloc(sh_audio->wf, sizeof(WAVEFORMATEX)+sh_audio->wf->cbSize);
}
chunksize=0;
if(verbose>=1) print_wave_header(sh_audio->wf);
++priv->audio_streams;
// if(demuxer->audio->id==-1) demuxer->audio->id=stream_id;
}
break;
}
case mmioFOURCC('v', 'p', 'r', 'p'): {
VideoPropHeader *vprp = malloc(chunksize);
unsigned int i;
stream_read(demuxer->stream, (void*)vprp, chunksize);
le2me_VideoPropHeader(vprp);
chunksize -= sizeof(*vprp)-sizeof(vprp->FieldInfo);
chunksize /= sizeof(VIDEO_FIELD_DESC);
if (vprp->nbFieldPerFrame > chunksize) {
vprp->nbFieldPerFrame = chunksize;
}
chunksize = 0;
for (i=0; i<vprp->nbFieldPerFrame; i++) {
le2me_VIDEO_FIELD_DESC(&vprp->FieldInfo[i]);
}
if (sh_video) {
sh_video->aspect = GET_AVI_ASPECT(vprp->dwFrameAspectRatio);
}
if(verbose>=1) print_vprp(vprp);
break;
}
case mmioFOURCC('d', 'm', 'l', 'h'): {
// dmlh 00 00 00 04 frms
unsigned int total_frames = stream_read_dword_le(demuxer->stream);
mp_msg(MSGT_HEADER,MSGL_V,"AVI: dmlh found (size=%d) (total_frames=%d)\n", chunksize, total_frames);
stream_skip(demuxer->stream, chunksize-4);
chunksize = 0;
}
break;
case ckidAVINEWINDEX:
if(demuxer->movi_end>stream_tell(demuxer->stream))
demuxer->movi_end=stream_tell(demuxer->stream); // fixup movi-end
if(index_mode && !priv->isodml){
int i;
off_t base = 0;
uint32_t last_off = 0;
priv->idx_size=size2>>4;
mp_msg(MSGT_HEADER,MSGL_V,"Reading INDEX block, %d chunks for %ld frames (fpos=%p)\n",
priv->idx_size,avih.dwTotalFrames, stream_tell(demuxer->stream));
priv->idx=malloc(priv->idx_size<<4);
// printf("\nindex to %p !!!!! (priv=%p)\n",priv->idx,priv);
stream_read(demuxer->stream,(char*)priv->idx,priv->idx_size<<4);
for (i = 0; i < priv->idx_size; i++) { // swap index to machine endian
AVIINDEXENTRY *entry=(AVIINDEXENTRY*)priv->idx + i;
le2me_AVIINDEXENTRY(entry);
/*
* We (ab)use the upper word for bits 32-47 of the offset, so
* we'll clear them here.
* FIXME: AFAIK no codec uses them, but if one does it will break
*/
entry->dwFlags&=0xffff;
}
chunksize-=priv->idx_size<<4;
if(verbose>=2) print_index(priv->idx,priv->idx_size);
}
break;
/* added May 2002 */
case mmioFOURCC('R','I','F','F'): {
char riff_type[4];
mp_msg(MSGT_HEADER, MSGL_V, "additional RIFF header...\n");
stream_read(demuxer->stream, riff_type, sizeof riff_type);
if (strncmp(riff_type, "AVIX", sizeof riff_type))
mp_msg(MSGT_HEADER, MSGL_WARN,
"** warning: this is no extended AVI header..\n");
else {
/*
* We got an extended AVI header, so we need to switch to
* ODML to get seeking to work, provided we got indx chunks
* in the header (suidx_size > 0).
*/
if (priv->suidx_size > 0)
priv->isodml = 1;
}
chunksize = 0;
list_end = 0; /* a new list will follow */
break; }
case ckidAVIPADDING:
stream_skip(demuxer->stream, chunksize);
chunksize = 0;
break;
}
if(hdr){
mp_msg(MSGT_HEADER,MSGL_V,"hdr=%s size=%u\n",hdr,size2);
if(size2==3)
chunksize=1; // empty
else {
char buf[256];
int len=(size2<250)?size2:250;
stream_read(demuxer->stream,buf,len);
chunksize-=len;
buf[len]=0;
mp_msg(MSGT_HEADER,MSGL_V,"%-10s: %s\n",hdr,buf);
demux_info_add(demuxer, hdr, buf);
}
}
mp_msg(MSGT_HEADER,MSGL_DBG2,"list_end=0x%X pos=0x%X chunksize=0x%X next=0x%X\n",
(int)list_end, (int)stream_tell(demuxer->stream),
chunksize, (int)chunksize+stream_tell(demuxer->stream));
if(list_end>0 &&
chunksize+stream_tell(demuxer->stream) == list_end) list_end=0;
if(list_end>0 && chunksize+stream_tell(demuxer->stream)>list_end){
mp_msg(MSGT_HEADER,MSGL_V,"Broken chunk? chunksize=%d (id=%.4s)\n",chunksize,(char *) &id);
stream_seek(demuxer->stream,list_end);
list_end=0;
} else
if(chunksize>0) stream_skip(demuxer->stream,chunksize); else
if((int)chunksize<0) mp_msg(MSGT_HEADER,MSGL_WARN,"chunksize=%u (id=%.4s)\n",chunksize,(char *) &id);
}
if (priv->suidx_size > 0 && priv->idx_size == 0) {
/*
* No NEWAVIINDEX, but we got an OpenDML index.
*/
priv->isodml = 1;
}
if (priv->isodml && (index_mode==-1 || index_mode==0)) {
int i, j, k;
int safety=1000;
avisuperindex_chunk *cx;
AVIINDEXENTRY *idx;
if (priv->idx_size) free(priv->idx);
priv->idx_size = 0;
priv->idx_offset = 0;
priv->idx = NULL;
mp_msg(MSGT_HEADER, MSGL_INFO,
"AVI: ODML: Building odml index (%d superindexchunks)\n", priv->suidx_size);
// read the standard indices
for (cx = &priv->suidx[0], i=0; i<priv->suidx_size; cx++, i++) {
stream_reset(demuxer->stream);
for (j=0; j<cx->nEntriesInUse; j++) {
int ret1, ret2;
memset(&cx->stdidx[j], 0, 32);
ret1 = stream_seek(demuxer->stream, (off_t)cx->aIndex[j].qwOffset);
ret2 = stream_read(demuxer->stream, (char *)&cx->stdidx[j], 32);
if (ret1 != 1 || ret2 != 32 || cx->stdidx[j].nEntriesInUse==0) {
// this is a broken file (probably incomplete) let the standard
// gen_index routine handle this
priv->isodml = 0;
priv->idx_size = 0;
mp_msg(MSGT_HEADER, MSGL_WARN,
"AVI: ODML: Broken (incomplete?) file detected. Will use traditional index\n");
goto freeout;
}
le2me_AVISTDIDXCHUNK(&cx->stdidx[j]);
print_avistdindex_chunk(&cx->stdidx[j]);
priv->idx_size += cx->stdidx[j].nEntriesInUse;
cx->stdidx[j].aIndex = malloc(cx->stdidx[j].nEntriesInUse*sizeof(avistdindex_entry));
stream_read(demuxer->stream, (char *)cx->stdidx[j].aIndex,
cx->stdidx[j].nEntriesInUse*sizeof(avistdindex_entry));
for (k=0;k<cx->stdidx[j].nEntriesInUse; k++)
le2me_AVISTDIDXENTRY(&cx->stdidx[j].aIndex[k]);
cx->stdidx[j].dwReserved3 = 0;
}
}
/*
* We convert the index by translating all entries into AVIINDEXENTRYs
* and sorting them by offset. The result should be the same index
* we would get with -forceidx.
*/
idx = priv->idx = malloc(priv->idx_size * sizeof (AVIINDEXENTRY));
for (cx = priv->suidx; cx != &priv->suidx[priv->suidx_size]; cx++) {
avistdindex_chunk *sic;
for (sic = cx->stdidx; sic != &cx->stdidx[cx->nEntriesInUse]; sic++) {
avistdindex_entry *sie;
for (sie = sic->aIndex; sie != &sic->aIndex[sic->nEntriesInUse]; sie++) {
uint64_t off = sic->qwBaseOffset + sie->dwOffset - 8;
memcpy(&idx->ckid, sic->dwChunkId, 4);
idx->dwChunkOffset = off;
idx->dwFlags = (off >> 32) << 16;
idx->dwChunkLength = sie->dwSize & 0x7fffffff;
idx->dwFlags |= (sie->dwSize&0x80000000)?0x0:AVIIF_KEYFRAME; // bit 31 denotes !keyframe
idx++;
}
}
}
avi_idx_quicksort(priv->idx, 0, priv->idx_size-1);
/*
Hack to work around a "wrong" index in some divx odml files
(processor_burning.avi as an example)
They have ##dc on non keyframes but the ix00 tells us they are ##db.
Read the fcc of a non-keyframe vid frame and check it.
*/
{
uint32_t id;
uint32_t db = 0;
stream_reset (demuxer->stream);
// find out the video stream id. I have seen files with 01db.
for (idx = &((AVIINDEXENTRY *)priv->idx)[0], i=0; i<priv->idx_size; i++, idx++){
unsigned char res[2];
if (odml_get_vstream_id(idx->ckid, res)) {
db = mmioFOURCC(res[0], res[1], 'd', 'b');
break;
}
}
// find first non keyframe
for (idx = &((AVIINDEXENTRY *)priv->idx)[0], i=0; i<priv->idx_size; i++, idx++){
if (!(idx->dwFlags & AVIIF_KEYFRAME) && idx->ckid == db) break;
}
if (i<priv->idx_size && db) {
stream_seek(demuxer->stream, AVI_IDX_OFFSET(idx));
id = stream_read_dword_le(demuxer->stream);
if (id && id != db) // index fcc and real fcc differ? fix it.
for (idx = &((AVIINDEXENTRY *)priv->idx)[0], i=0; i<priv->idx_size; i++, idx++){
if (!(idx->dwFlags & AVIIF_KEYFRAME) && idx->ckid == db)
idx->ckid = id;
}
}
}
if (verbose>=2) print_index(priv->idx, priv->idx_size);
demuxer->movi_end=demuxer->stream->end_pos;
freeout:
// free unneeded stuff
cx = &priv->suidx[0];
do {
for (j=0;j<cx->nEntriesInUse;j++)
if (cx->stdidx[j].nEntriesInUse) free(cx->stdidx[j].aIndex);
free(cx->stdidx);
} while (cx++ != &priv->suidx[priv->suidx_size-1]);
free(priv->suidx);
}
/* Read a saved index file */
if (index_file_load) {
FILE *fp;
char magic[7];
unsigned int i;
if ((fp = fopen(index_file_load, "r")) == NULL) {
mp_msg(MSGT_HEADER,MSGL_ERR, "Can't read index file %s: %s\n", index_file_load, strerror(errno));
goto gen_index;
}
fread(&magic, 6, 1, fp);
if (strncmp(magic, "MPIDX1", 6)) {
mp_msg(MSGT_HEADER,MSGL_ERR, "%s is not a valid MPlayer index file\n", index_file_load);
goto gen_index;
}
fread(&priv->idx_size, sizeof(priv->idx_size), 1, fp);
priv->idx=malloc(priv->idx_size*sizeof(AVIINDEXENTRY));
if (!priv->idx) {
mp_msg(MSGT_HEADER,MSGL_ERR, "Could not allocate memory for index data from %s\n", index_file_load);
priv->idx_size = 0;
goto gen_index;
}
for (i=0; i<priv->idx_size;i++) {
AVIINDEXENTRY *idx;
idx=&((AVIINDEXENTRY *)priv->idx)[i];
fread(idx, sizeof(AVIINDEXENTRY), 1, fp);
if (feof(fp)) {
mp_msg(MSGT_HEADER,MSGL_ERR, "Premature end of index file %s\n", index_file_load);
free(priv->idx);
priv->idx_size = 0;
goto gen_index;
}
}
fclose(fp);
mp_msg(MSGT_HEADER,MSGL_INFO, "Loaded index file: %s\n", index_file_load);
}
gen_index:
if(index_mode>=2 || (priv->idx_size==0 && index_mode==1)){
// build index for file:
stream_reset(demuxer->stream);
stream_seek(demuxer->stream,demuxer->movi_start);
priv->idx_pos=0;
priv->idx_size=0;
priv->idx=NULL;
while(1){
int id;
unsigned len;
off_t skip;
AVIINDEXENTRY* idx;
unsigned int c;
demuxer->filepos=stream_tell(demuxer->stream);
if(demuxer->filepos>=demuxer->movi_end && demuxer->movi_start<demuxer->movi_end) break;
id=stream_read_dword_le(demuxer->stream);
len=stream_read_dword_le(demuxer->stream);
if(id==mmioFOURCC('L','I','S','T') || id==mmioFOURCC('R', 'I', 'F', 'F')){
id=stream_read_dword_le(demuxer->stream); // list or RIFF type
continue;
}
if(stream_eof(demuxer->stream)) break;
if(!id || avi_stream_id(id)==100) goto skip_chunk; // bad ID (or padding?)
if(priv->idx_pos>=priv->idx_size){
// priv->idx_size+=32;
priv->idx_size+=1024; // +16kB
priv->idx=realloc(priv->idx,priv->idx_size*sizeof(AVIINDEXENTRY));
if(!priv->idx){priv->idx_pos=0; break;} // error!
}
idx=&((AVIINDEXENTRY *)priv->idx)[priv->idx_pos++];
idx->ckid=id;
idx->dwFlags=AVIIF_KEYFRAME; // FIXME
idx->dwFlags|=(demuxer->filepos>>16)&0xffff0000U;
idx->dwChunkOffset=(unsigned long)demuxer->filepos;
idx->dwChunkLength=len;
c=stream_read_dword(demuxer->stream);
// Fix keyframes for DivX files:
if(idxfix_divx)
if(avi_stream_id(id)==idxfix_videostream){
switch(idxfix_divx){
case 3: c=stream_read_dword(demuxer->stream)<<5; //skip 32+5 bits for m$mpeg4v1
case 1: if(c&0x40000000) idx->dwFlags&=~AVIIF_KEYFRAME;break; // divx 3
case 2: if(c==0x1B6) idx->dwFlags&=~AVIIF_KEYFRAME;break; // divx 4
}
}
// update status line:
{ static off_t lastpos;
off_t pos;
off_t len=demuxer->movi_end-demuxer->movi_start;
if(len){
pos=100*(demuxer->filepos-demuxer->movi_start)/len; // %
} else {
pos=(demuxer->filepos-demuxer->movi_start)>>20; // MB
}
if(pos!=lastpos){
lastpos=pos;
mp_msg(MSGT_HEADER,MSGL_STATUS,"Generating Index: %3lu %s \r",
(unsigned long)pos, len?"%":"MB");
}
}
mp_dbg(MSGT_HEADER,MSGL_DBG2,"%08X %08X %.4s %08X %X\n",(unsigned int)demuxer->filepos,id,(char *) &id,(int)c,(unsigned int) idx->dwFlags);
#if 0
{ unsigned char tmp[64];
int i;
stream_read(demuxer->stream,tmp,64);
printf("%.4s",&id);
for(i=0;i<64;i++) printf(" %02X",tmp[i]);
printf("\n");
}
#endif
skip_chunk:
skip=(len+1)&(~1UL); // total bytes in this chunk
stream_seek(demuxer->stream,8+demuxer->filepos+skip);
}
priv->idx_size=priv->idx_pos;
mp_msg(MSGT_HEADER,MSGL_INFO,"AVI: Generated index table for %d chunks!\n",priv->idx_size);
if(verbose>=2) print_index(priv->idx,priv->idx_size);
/* Write generated index to a file */
if (index_file_save) {
FILE *fp;
unsigned int i;
if ((fp=fopen(index_file_save, "w")) == NULL) {
mp_msg(MSGT_HEADER,MSGL_ERR, "Couldn't write index file %s: %s\n", index_file_save, strerror(errno));
return;
}
fwrite("MPIDX1", 6, 1, fp);
fwrite(&priv->idx_size, sizeof(priv->idx_size), 1, fp);
for (i=0; i<priv->idx_size; i++) {
AVIINDEXENTRY *idx = &((AVIINDEXENTRY *)priv->idx)[i];
fwrite(idx, sizeof(AVIINDEXENTRY), 1, fp);
}
fclose(fp);
mp_msg(MSGT_HEADER,MSGL_INFO, "Saved index file: %s\n", index_file_save);
}
}
}
#undef MIN
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