1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#include "mp_msg.h"
#include "stream.h"
#include "demuxer.h"
#include "wine/mmreg.h"
#include "wine/avifmt.h"
#include "wine/vfw.h"
#include "codec-cfg.h"
#include "bswap.h"
#include "stheader.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);
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;
//---- AVI header:
priv->idx_size=0;
while(1){
int id=stream_read_dword_le(demuxer->stream);
int chunksize,size2;
static int last_fccType=0;
char* hdr=NULL;
//
if(stream_eof(demuxer->stream)) break;
//
if(id==mmioFOURCC('L','I','S','T')){
int len=stream_read_dword_le(demuxer->stream)-4; // list size
id=stream_read_dword_le(demuxer->stream); // list type
mp_msg(MSGT_HEADER,MSGL_DBG2,"LIST %.4s len=%d\n",(char *) &id,len);
if(id==listtypeAVIMOVIE){
// found MOVI header
demuxer->movi_start=stream_tell(demuxer->stream);
demuxer->movi_end=demuxer->movi_start+len;
mp_msg(MSGT_HEADER,MSGL_V,"Found movie at 0x%X - 0x%X\n",(int)demuxer->movi_start,(int)demuxer->movi_end);
if(index_mode==-2) break; // reading from non-seekable source (stdin)
len=(len+1)&(~1);
stream_skip(demuxer->stream,len);
}
continue;
}
size2=stream_read_dword_le(demuxer->stream);
mp_msg(MSGT_HEADER,MSGL_DBG2,"CHUNK %.4s len=%d\n",(char *) &id,size2);
chunksize=(size2+1)&(~1);
switch(id){
case mmioFOURCC('I','S','F','T'): hdr="Software";break;
case mmioFOURCC('I','N','A','M'): hdr="Name";break;
case mmioFOURCC('I','S','B','J'): hdr="Title";break;
case mmioFOURCC('I','A','R','T'): hdr="Author";break;
case mmioFOURCC('I','C','O','P'): hdr="Copyright";break;
case mmioFOURCC('I','C','M','T'): hdr="Comment";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) 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 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', %d 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
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('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; // we can fix keyframes only for divx coded files!
}
} else
if(last_fccType==streamtypeAUDIO){
int 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);
// if(demuxer->audio->id==-1) demuxer->audio->id=stream_id;
}
break;
}
case ckidAVINEWINDEX: if(index_mode){
int i;
priv->idx_size=size2>>4;
mp_msg(MSGT_HEADER,MSGL_V,"Reading INDEX block, %d chunks for %ld frames\n",
priv->idx_size,avih.dwTotalFrames);
priv->idx=malloc(priv->idx_size<<4);
stream_read(demuxer->stream,(char*)priv->idx,priv->idx_size<<4);
for (i = 0; i < priv->idx_size; i++) // swap index to machine endian
le2me_AVIINDEXENTRY((AVIINDEXENTRY*)priv->idx + i);
chunksize-=priv->idx_size<<4;
if(verbose>=2) print_index(priv->idx,priv->idx_size);
break;
}
}
if(hdr){
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);
}
if(chunksize>0) stream_skip(demuxer->stream,chunksize); else
if(chunksize<0) mp_msg(MSGT_HEADER,MSGL_WARN,"chunksize=%d (id=%.4s)\n",chunksize,(char *) &id);
}
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,len,skip;
AVIINDEXENTRY* idx;
unsigned char c;
demuxer->filepos=stream_tell(demuxer->stream);
if(demuxer->filepos>=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=stream_read_dword_le(demuxer->stream); // list 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->dwChunkOffset=demuxer->filepos;
idx->dwChunkLength=len;
c=stream_read_char(demuxer->stream);
// Fix keyframes for DivX files:
if(idxfix_divx)
if(avi_stream_id(id)==idxfix_videostream){
if(c&0x40) idx->dwFlags=0;
}
mp_dbg(MSGT_HEADER,MSGL_DBG2,"%08X %08X %.4s %02X %X\n",demuxer->filepos,id,(char *) &id,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)&(~1); // 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);
}
}
#undef MIN
|
