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source: vbox/trunk/src/libs/ffmpeg-20060710/libavformat/img2.c@ 7692

Last change on this file since 7692 was 5776, checked in by vboxsync, 17 years ago

ffmpeg: exported to OSE
File size: 10.7 KB
Line 
1/*
2 * Image format
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
4 * Copyright (c) 2004 Michael Niedermayer
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20#include "avformat.h"
21
22/* XXX: this is a hack */
23extern int loop_input;
24
25typedef struct {
26 int img_first;
27 int img_last;
28 int img_number;
29 int img_count;
30 int is_pipe;
31 char path[1024];
32} VideoData;
33
34typedef struct {
35 enum CodecID id;
36 const char *str;
37} IdStrMap;
38
39static const IdStrMap img_tags[] = {
40 { CODEC_ID_MJPEG , "jpeg"},
41 { CODEC_ID_MJPEG , "jpg"},
42 { CODEC_ID_LJPEG , "ljpg"},
43 { CODEC_ID_PNG , "png"},
44 { CODEC_ID_PPM , "ppm"},
45 { CODEC_ID_PGM , "pgm"},
46 { CODEC_ID_PGMYUV , "pgmyuv"},
47 { CODEC_ID_PBM , "pbm"},
48 { CODEC_ID_PAM , "pam"},
49 { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
50 { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
51 { CODEC_ID_MPEG4 , "mpg4-img"},
52 { CODEC_ID_FFV1 , "ffv1-img"},
53 { CODEC_ID_RAWVIDEO , "y"},
54 { CODEC_ID_BMP , "bmp"},
55 {0, NULL}
56};
57
58static int sizes[][2] = {
59 { 640, 480 },
60 { 720, 480 },
61 { 720, 576 },
62 { 352, 288 },
63 { 352, 240 },
64 { 160, 128 },
65 { 512, 384 },
66 { 640, 352 },
67 { 640, 240 },
68};
69
70static int infer_size(int *width_ptr, int *height_ptr, int size)
71{
72 int i;
73
74 for(i=0;i<sizeof(sizes)/sizeof(sizes[0]);i++) {
75 if ((sizes[i][0] * sizes[i][1]) == size) {
76 *width_ptr = sizes[i][0];
77 *height_ptr = sizes[i][1];
78 return 0;
79 }
80 }
81 return -1;
82}
83static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
84{
85 str= strrchr(str, '.');
86 if(!str) return CODEC_ID_NONE;
87 str++;
88
89 while (tags->id) {
90 int i;
91 for(i=0; toupper(tags->str[i]) == toupper(str[i]); i++){
92 if(tags->str[i]==0 && str[i]==0)
93 return tags->id;
94 }
95
96 tags++;
97 }
98 return CODEC_ID_NONE;
99}
100
101/* return -1 if no image found */
102static int find_image_range(int *pfirst_index, int *plast_index,
103 const char *path)
104{
105 char buf[1024];
106 int range, last_index, range1, first_index;
107
108 /* find the first image */
109 for(first_index = 0; first_index < 5; first_index++) {
110 if (get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
111 *pfirst_index =
112 *plast_index = 1;
113 return 0;
114 }
115 if (url_exist(buf))
116 break;
117 }
118 if (first_index == 5)
119 goto fail;
120
121 /* find the last image */
122 last_index = first_index;
123 for(;;) {
124 range = 0;
125 for(;;) {
126 if (!range)
127 range1 = 1;
128 else
129 range1 = 2 * range;
130 if (get_frame_filename(buf, sizeof(buf), path,
131 last_index + range1) < 0)
132 goto fail;
133 if (!url_exist(buf))
134 break;
135 range = range1;
136 /* just in case... */
137 if (range >= (1 << 30))
138 goto fail;
139 }
140 /* we are sure than image last_index + range exists */
141 if (!range)
142 break;
143 last_index += range;
144 }
145 *pfirst_index = first_index;
146 *plast_index = last_index;
147 return 0;
148 fail:
149 return -1;
150}
151
152
153static int image_probe(AVProbeData *p)
154{
155 if (filename_number_test(p->filename) >= 0 && av_str2id(img_tags, p->filename))
156 return AVPROBE_SCORE_MAX;
157 else
158 return 0;
159}
160
161enum CodecID av_guess_image2_codec(const char *filename){
162 return av_str2id(img_tags, filename);
163}
164
165static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
166{
167 VideoData *s = s1->priv_data;
168 int first_index, last_index;
169 AVStream *st;
170
171 s1->ctx_flags |= AVFMTCTX_NOHEADER;
172
173 st = av_new_stream(s1, 0);
174 if (!st) {
175 return -ENOMEM;
176 }
177
178 pstrcpy(s->path, sizeof(s->path), s1->filename);
179 s->img_number = 0;
180 s->img_count = 0;
181
182 /* find format */
183 if (s1->iformat->flags & AVFMT_NOFILE)
184 s->is_pipe = 0;
185 else{
186 s->is_pipe = 1;
187 st->need_parsing= 1;
188 }
189
190 if (!ap->time_base.num) {
191 av_set_pts_info(st, 60, 1, 25);
192 } else {
193 av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
194 }
195
196 if(ap->width && ap->height){
197 st->codec->width = ap->width;
198 st->codec->height= ap->height;
199 }
200
201 if (!s->is_pipe) {
202 if (find_image_range(&first_index, &last_index, s->path) < 0)
203 return AVERROR_IO;
204 s->img_first = first_index;
205 s->img_last = last_index;
206 s->img_number = first_index;
207 /* compute duration */
208 st->start_time = 0;
209 st->duration = last_index - first_index + 1;
210 }
211
212 if(ap->video_codec_id){
213 st->codec->codec_type = CODEC_TYPE_VIDEO;
214 st->codec->codec_id = ap->video_codec_id;
215 }else if(ap->audio_codec_id){
216 st->codec->codec_type = CODEC_TYPE_AUDIO;
217 st->codec->codec_id = ap->audio_codec_id;
218 }else{
219 st->codec->codec_type = CODEC_TYPE_VIDEO;
220 st->codec->codec_id = av_str2id(img_tags, s->path);
221 }
222 if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
223 st->codec->pix_fmt = ap->pix_fmt;
224
225 return 0;
226}
227
228static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
229{
230 VideoData *s = s1->priv_data;
231 char filename[1024];
232 int i;
233 int size[3]={0}, ret[3]={0};
234 ByteIOContext f1[3], *f[3]= {&f1[0], &f1[1], &f1[2]};
235 AVCodecContext *codec= s1->streams[0]->codec;
236
237 if (!s->is_pipe) {
238 /* loop over input */
239 if (loop_input && s->img_number > s->img_last) {
240 s->img_number = s->img_first;
241 }
242 if (get_frame_filename(filename, sizeof(filename),
243 s->path, s->img_number)<0 && s->img_number > 1)
244 return AVERROR_IO;
245 for(i=0; i<3; i++){
246 if (url_fopen(f[i], filename, URL_RDONLY) < 0)
247 return AVERROR_IO;
248 size[i]= url_fsize(f[i]);
249
250 if(codec->codec_id != CODEC_ID_RAWVIDEO)
251 break;
252 filename[ strlen(filename) - 1 ]= 'U' + i;
253 }
254
255 if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
256 infer_size(&codec->width, &codec->height, size[0]);
257 } else {
258 f[0] = &s1->pb;
259 if (url_feof(f[0]))
260 return AVERROR_IO;
261 size[0]= 4096;
262 }
263
264 av_new_packet(pkt, size[0] + size[1] + size[2]);
265 pkt->stream_index = 0;
266 pkt->flags |= PKT_FLAG_KEY;
267
268 pkt->size= 0;
269 for(i=0; i<3; i++){
270 if(size[i]){
271 ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
272 if (!s->is_pipe)
273 url_fclose(f[i]);
274 if(ret[i]>0)
275 pkt->size += ret[i];
276 }
277 }
278
279 if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
280 av_free_packet(pkt);
281 return AVERROR_IO; /* signal EOF */
282 } else {
283 s->img_count++;
284 s->img_number++;
285 return 0;
286 }
287}
288
289static int img_read_close(AVFormatContext *s1)
290{
291 return 0;
292}
293
294#ifdef CONFIG_MUXERS
295/******************************************************/
296/* image output */
297
298static int img_write_header(AVFormatContext *s)
299{
300 VideoData *img = s->priv_data;
301
302 img->img_number = 1;
303 pstrcpy(img->path, sizeof(img->path), s->filename);
304
305 /* find format */
306 if (s->oformat->flags & AVFMT_NOFILE)
307 img->is_pipe = 0;
308 else
309 img->is_pipe = 1;
310
311 return 0;
312}
313
314static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
315{
316 VideoData *img = s->priv_data;
317 ByteIOContext pb1[3], *pb[3]= {&pb1[0], &pb1[1], &pb1[2]};
318 char filename[1024];
319 AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
320 int i;
321
322 if (!img->is_pipe) {
323 if (get_frame_filename(filename, sizeof(filename),
324 img->path, img->img_number) < 0 && img->img_number>1)
325 return AVERROR_IO;
326 for(i=0; i<3; i++){
327 if (url_fopen(pb[i], filename, URL_WRONLY) < 0)
328 return AVERROR_IO;
329
330 if(codec->codec_id != CODEC_ID_RAWVIDEO)
331 break;
332 filename[ strlen(filename) - 1 ]= 'U' + i;
333 }
334 } else {
335 pb[0] = &s->pb;
336 }
337
338 if(codec->codec_id == CODEC_ID_RAWVIDEO){
339 int ysize = codec->width * codec->height;
340 put_buffer(pb[0], pkt->data , ysize);
341 put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
342 put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
343 put_flush_packet(pb[1]);
344 put_flush_packet(pb[2]);
345 url_fclose(pb[1]);
346 url_fclose(pb[2]);
347 }else{
348 put_buffer(pb[0], pkt->data, pkt->size);
349 }
350 put_flush_packet(pb[0]);
351 if (!img->is_pipe) {
352 url_fclose(pb[0]);
353 }
354
355 img->img_number++;
356 return 0;
357}
358
359static int img_write_trailer(AVFormatContext *s)
360{
361 return 0;
362}
363
364#endif /* CONFIG_MUXERS */
365
366/* input */
367
368static AVInputFormat image2_demuxer = {
369 "image2",
370 "image2 sequence",
371 sizeof(VideoData),
372 image_probe,
373 img_read_header,
374 img_read_packet,
375 img_read_close,
376 NULL,
377 NULL,
378 AVFMT_NOFILE,
379};
380
381static AVInputFormat image2pipe_demuxer = {
382 "image2pipe",
383 "piped image2 sequence",
384 sizeof(VideoData),
385 NULL, /* no probe */
386 img_read_header,
387 img_read_packet,
388 img_read_close,
389 NULL,
390};
391
392
393#ifdef CONFIG_MUXERS
394/* output */
395
396static AVOutputFormat image2_muxer = {
397 "image2",
398 "image2 sequence",
399 "",
400 "",
401 sizeof(VideoData),
402 CODEC_ID_NONE,
403 CODEC_ID_MJPEG,
404 img_write_header,
405 img_write_packet,
406 img_write_trailer,
407 AVFMT_NOFILE,
408};
409
410static AVOutputFormat image2pipe_muxer = {
411 "image2pipe",
412 "piped image2 sequence",
413 "",
414 "",
415 sizeof(VideoData),
416 CODEC_ID_NONE,
417 CODEC_ID_MJPEG,
418 img_write_header,
419 img_write_packet,
420 img_write_trailer,
421};
422#endif /* CONFIG_MUXERS */
423
424int img2_init(void)
425{
426 av_register_input_format(&image2_demuxer);
427 av_register_input_format(&image2pipe_demuxer);
428
429#ifdef CONFIG_MUXERS
430 av_register_output_format(&image2_muxer);
431 av_register_output_format(&image2pipe_muxer);
432#endif
433
434 return 0;
435}
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