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
|
/*
FLI file parser for the MPlayer program
by Mike Melanson
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"
typedef struct _fli_frames_t {
int num_frames;
int current_frame;
off_t *filepos;
unsigned int *frame_size;
} fli_frames_t;
static void demux_seek_fli(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags){
fli_frames_t *frames = (fli_frames_t *)demuxer->priv;
sh_video_t *sh_video = demuxer->video->sh;
int newpos=(flags&1)?0:frames->current_frame;
if(flags&2){
// float 0..1
newpos+=rel_seek_secs*frames->num_frames;
} else {
// secs
newpos+=rel_seek_secs*sh_video->fps;
}
if(newpos<0) newpos=0; else
if(newpos>frames->num_frames) newpos=frames->num_frames;
frames->current_frame=newpos;
}
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
static int demux_fli_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds){
fli_frames_t *frames = (fli_frames_t *)demuxer->priv;
sh_video_t *sh_video = demuxer->video->sh;
// see if the end has been reached
if (frames->current_frame >= frames->num_frames)
return 0;
// fetch the frame from the file
// first, position the file properly since ds_read_packet() doesn't
// seem to do it, even though it takes a file offset as a parameter
stream_seek(demuxer->stream, frames->filepos[frames->current_frame]);
ds_read_packet(demuxer->video,
demuxer->stream,
frames->frame_size[frames->current_frame],
frames->current_frame/sh_video->fps,
frames->filepos[frames->current_frame],
0 /* what flags? -> demuxer.h (alex) */
);
// get the next frame ready
frames->current_frame++;
return 1;
}
static demuxer_t* demux_open_fli(demuxer_t* demuxer){
sh_video_t *sh_video = NULL;
fli_frames_t *frames = (fli_frames_t *)malloc(sizeof(fli_frames_t));
int frame_number;
int speed;
unsigned int frame_size;
int magic_number;
unsigned char * header;
// go back to the beginning
stream_reset(demuxer->stream);
stream_seek(demuxer->stream, 0);
header = malloc(sizeof(BITMAPINFOHEADER) + 128);
stream_read(demuxer->stream, header + sizeof(BITMAPINFOHEADER), 128);
stream_seek(demuxer->stream, 0);
demuxer->movi_start = 128;
demuxer->movi_end = stream_read_dword_le(demuxer->stream);
magic_number = stream_read_word_le(demuxer->stream);
if ((magic_number != 0xAF11) && (magic_number != 0xAF12))
{
mp_msg(MSGT_DEMUX, MSGL_ERR, "Bad/unknown magic number (%04x)\n",
magic_number);
free(header);
free(frames);
return(NULL);
}
// fetch the number of frames
frames->num_frames = stream_read_word_le(demuxer->stream);
frames->current_frame = 0;
// allocate enough entries for the indices
// audit: num_frames is 16bit so it is safe against overflow
frames->filepos = (off_t *)malloc(frames->num_frames * sizeof(off_t));
frames->frame_size = (int *)malloc(frames->num_frames * sizeof(int));
// create a new video stream header
sh_video = new_sh_video(demuxer, 0);
// make sure the demuxer knows about the new video stream header
// (even though new_sh_video() ought to take care of it)
demuxer->video->sh = sh_video;
// make sure that the video demuxer stream header knows about its
// parent video demuxer stream (this is getting wacky), or else
// video_read_properties() will choke
sh_video->ds = demuxer->video;
// custom fourcc for internal MPlayer use
sh_video->format = mmioFOURCC('F', 'L', 'I', 'C');
sh_video->disp_w = stream_read_word_le(demuxer->stream);
sh_video->disp_h = stream_read_word_le(demuxer->stream);
// pass extradata to codec
sh_video->bih = (BITMAPINFOHEADER*)header;
sh_video->bih->biSize = sizeof(BITMAPINFOHEADER) + 128;
// skip the video depth and flags
stream_skip(demuxer->stream, 4);
// get the speed
speed = stream_read_word_le(demuxer->stream);
if (speed == 0)
speed = 1;
if (magic_number == 0xAF11)
speed *= 1000/70;
sh_video->fps = 1000 / speed;
sh_video->frametime = 1/sh_video->fps;
// build the frame index
stream_seek(demuxer->stream, demuxer->movi_start);
frame_number = 0;
while ((!stream_eof(demuxer->stream)) && (frame_number < frames->num_frames))
{
frames->filepos[frame_number] = stream_tell(demuxer->stream);
frame_size = stream_read_dword_le(demuxer->stream);
magic_number = stream_read_word_le(demuxer->stream);
stream_skip(demuxer->stream, frame_size - 6);
// if this chunk has the right magic number, index it
if ((magic_number == 0xF1FA) || (magic_number == 0xF5FA))
{
frames->frame_size[frame_number] = frame_size;
frame_number++;
}
}
// save the actual number of frames indexed
frames->num_frames = frame_number;
demuxer->priv = frames;
return demuxer;
}
static void demux_close_fli(demuxer_t* demuxer) {
fli_frames_t *frames = demuxer->priv;
if(!frames)
return;
if(frames->filepos)
free(frames->filepos);
if(frames->frame_size)
free(frames->frame_size);
free(frames);
}
static int fli_check_file(demuxer_t* demuxer)
{
int id;
stream_seek(demuxer->stream, 4);
id=stream_read_word_le(demuxer->stream);
// check for the FLI file magic number
if((id==0xAF11) || (id==0xAF12))
return DEMUXER_TYPE_FLI;
return 0;
}
demuxer_desc_t demuxer_desc_fli = {
"Autodesk FLIC demuxer",
"fli",
"FLI",
"Mike Melanson",
"Supports also some extensions",
DEMUXER_TYPE_FLI,
0, // unsafe autodetect (short signature)
fli_check_file,
demux_fli_fill_buffer,
demux_open_fli,
demux_close_fli,
demux_seek_fli,
NULL
};
|
