Remove useless img_read_close().
[libav.git] / libavformat / img2.c
1 /*
2 * Image format
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
4 * Copyright (c) 2004 Michael Niedermayer
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "libavutil/avstring.h"
24 #include "avformat.h"
25 #include <strings.h>
26
27 typedef struct {
28 int img_first;
29 int img_last;
30 int img_number;
31 int img_count;
32 int is_pipe;
33 char path[1024];
34 } VideoData;
35
36 typedef struct {
37 enum CodecID id;
38 const char *str;
39 } IdStrMap;
40
41 static const IdStrMap img_tags[] = {
42 { CODEC_ID_MJPEG , "jpeg"},
43 { CODEC_ID_MJPEG , "jpg"},
44 { CODEC_ID_LJPEG , "ljpg"},
45 { CODEC_ID_PNG , "png"},
46 { CODEC_ID_PNG , "mng"},
47 { CODEC_ID_PPM , "ppm"},
48 { CODEC_ID_PGM , "pgm"},
49 { CODEC_ID_PGMYUV , "pgmyuv"},
50 { CODEC_ID_PBM , "pbm"},
51 { CODEC_ID_PAM , "pam"},
52 { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
53 { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
54 { CODEC_ID_MPEG4 , "mpg4-img"},
55 { CODEC_ID_FFV1 , "ffv1-img"},
56 { CODEC_ID_RAWVIDEO , "y"},
57 { CODEC_ID_BMP , "bmp"},
58 { CODEC_ID_GIF , "gif"},
59 { CODEC_ID_TARGA , "tga"},
60 { CODEC_ID_TIFF , "tiff"},
61 { CODEC_ID_TIFF , "tif"},
62 { CODEC_ID_SGI , "sgi"},
63 { CODEC_ID_PTX , "ptx"},
64 { CODEC_ID_PCX , "pcx"},
65 { CODEC_ID_SUNRAST , "sun"},
66 { CODEC_ID_SUNRAST , "ras"},
67 { CODEC_ID_SUNRAST , "rs"},
68 { CODEC_ID_SUNRAST , "im1"},
69 { CODEC_ID_SUNRAST , "im8"},
70 { CODEC_ID_SUNRAST , "im24"},
71 { CODEC_ID_SUNRAST , "sunras"},
72 { CODEC_ID_NONE , NULL}
73 };
74
75 static int sizes[][2] = {
76 { 640, 480 },
77 { 720, 480 },
78 { 720, 576 },
79 { 352, 288 },
80 { 352, 240 },
81 { 160, 128 },
82 { 512, 384 },
83 { 640, 352 },
84 { 640, 240 },
85 };
86
87 static int infer_size(int *width_ptr, int *height_ptr, int size)
88 {
89 int i;
90
91 for(i=0;i<sizeof(sizes)/sizeof(sizes[0]);i++) {
92 if ((sizes[i][0] * sizes[i][1]) == size) {
93 *width_ptr = sizes[i][0];
94 *height_ptr = sizes[i][1];
95 return 0;
96 }
97 }
98 return -1;
99 }
100 static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
101 {
102 str= strrchr(str, '.');
103 if(!str) return CODEC_ID_NONE;
104 str++;
105
106 while (tags->id) {
107 if (!strcasecmp(str, tags->str))
108 return tags->id;
109
110 tags++;
111 }
112 return CODEC_ID_NONE;
113 }
114
115 /* return -1 if no image found */
116 static int find_image_range(int *pfirst_index, int *plast_index,
117 const char *path)
118 {
119 char buf[1024];
120 int range, last_index, range1, first_index;
121
122 /* find the first image */
123 for(first_index = 0; first_index < 5; first_index++) {
124 if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
125 *pfirst_index =
126 *plast_index = 1;
127 return 0;
128 }
129 if (url_exist(buf))
130 break;
131 }
132 if (first_index == 5)
133 goto fail;
134
135 /* find the last image */
136 last_index = first_index;
137 for(;;) {
138 range = 0;
139 for(;;) {
140 if (!range)
141 range1 = 1;
142 else
143 range1 = 2 * range;
144 if (av_get_frame_filename(buf, sizeof(buf), path,
145 last_index + range1) < 0)
146 goto fail;
147 if (!url_exist(buf))
148 break;
149 range = range1;
150 /* just in case... */
151 if (range >= (1 << 30))
152 goto fail;
153 }
154 /* we are sure than image last_index + range exists */
155 if (!range)
156 break;
157 last_index += range;
158 }
159 *pfirst_index = first_index;
160 *plast_index = last_index;
161 return 0;
162 fail:
163 return -1;
164 }
165
166
167 static int image_probe(AVProbeData *p)
168 {
169 if (p->filename && av_str2id(img_tags, p->filename)) {
170 if (av_filename_number_test(p->filename))
171 return AVPROBE_SCORE_MAX;
172 else
173 return AVPROBE_SCORE_MAX/2;
174 }
175 return 0;
176 }
177
178 enum CodecID av_guess_image2_codec(const char *filename){
179 return av_str2id(img_tags, filename);
180 }
181
182 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
183 {
184 VideoData *s = s1->priv_data;
185 int first_index, last_index;
186 AVStream *st;
187
188 s1->ctx_flags |= AVFMTCTX_NOHEADER;
189
190 st = av_new_stream(s1, 0);
191 if (!st) {
192 return AVERROR(ENOMEM);
193 }
194
195 av_strlcpy(s->path, s1->filename, sizeof(s->path));
196 s->img_number = 0;
197 s->img_count = 0;
198
199 /* find format */
200 if (s1->iformat->flags & AVFMT_NOFILE)
201 s->is_pipe = 0;
202 else{
203 s->is_pipe = 1;
204 st->need_parsing = AVSTREAM_PARSE_FULL;
205 }
206
207 if (!ap->time_base.num) {
208 av_set_pts_info(st, 60, 1, 25);
209 } else {
210 av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
211 }
212
213 if(ap->width && ap->height){
214 st->codec->width = ap->width;
215 st->codec->height= ap->height;
216 }
217
218 if (!s->is_pipe) {
219 if (find_image_range(&first_index, &last_index, s->path) < 0)
220 return AVERROR(EIO);
221 s->img_first = first_index;
222 s->img_last = last_index;
223 s->img_number = first_index;
224 /* compute duration */
225 st->start_time = 0;
226 st->duration = last_index - first_index + 1;
227 }
228
229 if(ap->video_codec_id){
230 st->codec->codec_type = CODEC_TYPE_VIDEO;
231 st->codec->codec_id = ap->video_codec_id;
232 }else if(ap->audio_codec_id){
233 st->codec->codec_type = CODEC_TYPE_AUDIO;
234 st->codec->codec_id = ap->audio_codec_id;
235 }else{
236 st->codec->codec_type = CODEC_TYPE_VIDEO;
237 st->codec->codec_id = av_str2id(img_tags, s->path);
238 }
239 if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
240 st->codec->pix_fmt = ap->pix_fmt;
241
242 return 0;
243 }
244
245 static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
246 {
247 VideoData *s = s1->priv_data;
248 char filename[1024];
249 int i;
250 int size[3]={0}, ret[3]={0};
251 ByteIOContext *f[3];
252 AVCodecContext *codec= s1->streams[0]->codec;
253
254 if (!s->is_pipe) {
255 /* loop over input */
256 if (s1->loop_input && s->img_number > s->img_last) {
257 s->img_number = s->img_first;
258 }
259 if (av_get_frame_filename(filename, sizeof(filename),
260 s->path, s->img_number)<0 && s->img_number > 1)
261 return AVERROR(EIO);
262 for(i=0; i<3; i++){
263 if (url_fopen(&f[i], filename, URL_RDONLY) < 0)
264 return AVERROR(EIO);
265 size[i]= url_fsize(f[i]);
266
267 if(codec->codec_id != CODEC_ID_RAWVIDEO)
268 break;
269 filename[ strlen(filename) - 1 ]= 'U' + i;
270 }
271
272 if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
273 infer_size(&codec->width, &codec->height, size[0]);
274 } else {
275 f[0] = s1->pb;
276 if (url_feof(f[0]))
277 return AVERROR(EIO);
278 size[0]= 4096;
279 }
280
281 av_new_packet(pkt, size[0] + size[1] + size[2]);
282 pkt->stream_index = 0;
283 pkt->flags |= PKT_FLAG_KEY;
284
285 pkt->size= 0;
286 for(i=0; i<3; i++){
287 if(size[i]){
288 ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
289 if (!s->is_pipe)
290 url_fclose(f[i]);
291 if(ret[i]>0)
292 pkt->size += ret[i];
293 }
294 }
295
296 if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
297 av_free_packet(pkt);
298 return AVERROR(EIO); /* signal EOF */
299 } else {
300 s->img_count++;
301 s->img_number++;
302 return 0;
303 }
304 }
305
306 #ifdef CONFIG_MUXERS
307 /******************************************************/
308 /* image output */
309
310 static int img_write_header(AVFormatContext *s)
311 {
312 VideoData *img = s->priv_data;
313
314 img->img_number = 1;
315 av_strlcpy(img->path, s->filename, sizeof(img->path));
316
317 /* find format */
318 if (s->oformat->flags & AVFMT_NOFILE)
319 img->is_pipe = 0;
320 else
321 img->is_pipe = 1;
322
323 return 0;
324 }
325
326 static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
327 {
328 VideoData *img = s->priv_data;
329 ByteIOContext *pb[3];
330 char filename[1024];
331 AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
332 int i;
333
334 if (!img->is_pipe) {
335 if (av_get_frame_filename(filename, sizeof(filename),
336 img->path, img->img_number) < 0 && img->img_number>1)
337 return AVERROR(EIO);
338 for(i=0; i<3; i++){
339 if (url_fopen(&pb[i], filename, URL_WRONLY) < 0)
340 return AVERROR(EIO);
341
342 if(codec->codec_id != CODEC_ID_RAWVIDEO)
343 break;
344 filename[ strlen(filename) - 1 ]= 'U' + i;
345 }
346 } else {
347 pb[0] = s->pb;
348 }
349
350 if(codec->codec_id == CODEC_ID_RAWVIDEO){
351 int ysize = codec->width * codec->height;
352 put_buffer(pb[0], pkt->data , ysize);
353 put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
354 put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
355 put_flush_packet(pb[1]);
356 put_flush_packet(pb[2]);
357 url_fclose(pb[1]);
358 url_fclose(pb[2]);
359 }else{
360 put_buffer(pb[0], pkt->data, pkt->size);
361 }
362 put_flush_packet(pb[0]);
363 if (!img->is_pipe) {
364 url_fclose(pb[0]);
365 }
366
367 img->img_number++;
368 return 0;
369 }
370
371 #endif /* CONFIG_MUXERS */
372
373 /* input */
374 #ifdef CONFIG_IMAGE2_DEMUXER
375 AVInputFormat image2_demuxer = {
376 "image2",
377 NULL_IF_CONFIG_SMALL("image2 sequence"),
378 sizeof(VideoData),
379 image_probe,
380 img_read_header,
381 img_read_packet,
382 NULL,
383 NULL,
384 NULL,
385 AVFMT_NOFILE,
386 };
387 #endif
388 #ifdef CONFIG_IMAGE2PIPE_DEMUXER
389 AVInputFormat image2pipe_demuxer = {
390 "image2pipe",
391 NULL_IF_CONFIG_SMALL("piped image2 sequence"),
392 sizeof(VideoData),
393 NULL, /* no probe */
394 img_read_header,
395 img_read_packet,
396 };
397 #endif
398
399 /* output */
400 #ifdef CONFIG_IMAGE2_MUXER
401 AVOutputFormat image2_muxer = {
402 "image2",
403 NULL_IF_CONFIG_SMALL("image2 sequence"),
404 "",
405 "",
406 sizeof(VideoData),
407 CODEC_ID_NONE,
408 CODEC_ID_MJPEG,
409 img_write_header,
410 img_write_packet,
411 NULL,
412 AVFMT_NOFILE,
413 };
414 #endif
415 #ifdef CONFIG_IMAGE2PIPE_MUXER
416 AVOutputFormat image2pipe_muxer = {
417 "image2pipe",
418 NULL_IF_CONFIG_SMALL("piped image2 sequence"),
419 "",
420 "",
421 sizeof(VideoData),
422 CODEC_ID_NONE,
423 CODEC_ID_MJPEG,
424 img_write_header,
425 img_write_packet,
426 };
427 #endif