10l (CONFIG_ZLIB)
[libav.git] / libavformat / img2.c
CommitLineData
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20#include "avformat.h"
21
22typedef struct {
23 int img_first;
24 int img_last;
25 int img_number;
26 int img_count;
27 int is_pipe;
28 char path[1024];
29} VideoData;
30
31typedef struct {
32 enum CodecID id;
33 const char *str;
34} IdStrMap;
35
36static const IdStrMap img_tags[] = {
37 { CODEC_ID_MJPEG , "jpeg"},
38 { CODEC_ID_MJPEG , "jpg"},
39 { CODEC_ID_LJPEG , "ljpg"},
4eff7cf4 40 { CODEC_ID_PNG , "png"},
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41 { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
42 { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
43 { CODEC_ID_MPEG4 , "mpg4-img"},
44 { CODEC_ID_FFV1 , "ffv1-img"},
45 {0, NULL}
46};
47
48static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
49{
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50 str= strrchr(str, '.');
51 if(!str) return CODEC_ID_NONE;
52 str++;
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53
54 while (tags->id) {
55 int i;
56 for(i=0; toupper(tags->str[i]) == toupper(str[i]); i++){
57 if(tags->str[i]==0 && str[i]==0)
58 return tags->id;
59 }
60
61 tags++;
62 }
63 return CODEC_ID_NONE;
64}
65
66static const char *av_id2str(const IdStrMap *tags, enum CodecID id)
67{
68 while (tags->id) {
69 if(tags->id == id)
70 return tags->str;
71 tags++;
72 }
73 return NULL;
74}
75
76/* return -1 if no image found */
77static int find_image_range(int *pfirst_index, int *plast_index,
78 const char *path)
79{
80 char buf[1024];
81 int range, last_index, range1, first_index;
82
83 /* find the first image */
84 for(first_index = 0; first_index < 5; first_index++) {
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85 if (get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
86 *pfirst_index =
87 *plast_index = 1;
88 return 0;
89 }
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90 if (url_exist(buf))
91 break;
92 }
93 if (first_index == 5)
94 goto fail;
95
96 /* find the last image */
97 last_index = first_index;
98 for(;;) {
99 range = 0;
100 for(;;) {
101 if (!range)
102 range1 = 1;
103 else
104 range1 = 2 * range;
105 if (get_frame_filename(buf, sizeof(buf), path,
106 last_index + range1) < 0)
107 goto fail;
108 if (!url_exist(buf))
109 break;
110 range = range1;
111 /* just in case... */
112 if (range >= (1 << 30))
113 goto fail;
114 }
115 /* we are sure than image last_index + range exists */
116 if (!range)
117 break;
118 last_index += range;
119 }
120 *pfirst_index = first_index;
121 *plast_index = last_index;
122 return 0;
123 fail:
124 return -1;
125}
126
127
128static int image_probe(AVProbeData *p)
129{
130 if (filename_number_test(p->filename) >= 0 && av_str2id(img_tags, p->filename))
131 return AVPROBE_SCORE_MAX;
132 else
133 return 0;
134}
135
136static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
137{
138 VideoData *s = s1->priv_data;
139 int first_index, last_index;
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140 AVStream *st;
141
142 s1->ctx_flags |= AVFMTCTX_NOHEADER;
143
144 st = av_new_stream(s1, 0);
145 if (!st) {
146 av_free(s);
147 return -ENOMEM;
148 }
149
150 strcpy(s->path, s1->filename);
151 s->img_number = 0;
152 s->img_count = 0;
153
154 /* find format */
155 if (s1->iformat->flags & AVFMT_NOFILE)
156 s->is_pipe = 0;
146210ca 157 else{
03cfe134 158 s->is_pipe = 1;
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159 st->need_parsing= 1;
160 }
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161
162 if (!ap || !ap->frame_rate) {
163 st->codec.frame_rate = 25;
164 st->codec.frame_rate_base = 1;
165 } else {
166 st->codec.frame_rate = ap->frame_rate;
167 st->codec.frame_rate_base = ap->frame_rate_base;
168 }
169
170 if (!s->is_pipe) {
171 if (find_image_range(&first_index, &last_index, s->path) < 0)
172 goto fail;
173 s->img_first = first_index;
174 s->img_last = last_index;
175 s->img_number = first_index;
176 /* compute duration */
177 st->start_time = 0;
178 st->duration = ((int64_t)AV_TIME_BASE *
179 (last_index - first_index + 1) *
180 st->codec.frame_rate_base) / st->codec.frame_rate;
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181 }
182
183 st->codec.codec_type = CODEC_TYPE_VIDEO;
184 st->codec.codec_id = av_str2id(img_tags, s->path);
185
186 return 0;
187
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188 fail:
189 av_free(s);
190 return AVERROR_IO;
191}
192
193static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
194{
195 VideoData *s = s1->priv_data;
196 char filename[1024];
197 int ret;
198 ByteIOContext f1, *f;
199
200 if (!s->is_pipe) {
201 /* loop over input */
202/* if (loop_input && s->img_number > s->img_last) {
203 s->img_number = s->img_first;
204 }*/
205 if (get_frame_filename(filename, sizeof(filename),
61fb3183 206 s->path, s->img_number)<0 && s->img_number > 1)
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207 return AVERROR_IO;
208 f = &f1;
209 if (url_fopen(f, filename, URL_RDONLY) < 0)
210 return AVERROR_IO;
211 } else {
212 f = &s1->pb;
213 if (url_feof(f))
214 return AVERROR_IO;
215 }
216
217 if (s->is_pipe) {
218 av_new_packet(pkt, 4096);
219 }else{
220 av_new_packet(pkt, url_filesize(url_fileno(f)));
221 }
222 pkt->stream_index = 0;
223 pkt->flags |= PKT_FLAG_KEY;
224
225 ret = get_buffer(f, pkt->data, pkt->size);
226 if (!s->is_pipe) {
227 url_fclose(f);
228 }
229
230 if (ret <= 0) {
231 av_free_packet(pkt);
232 return AVERROR_IO; /* signal EOF */
233 } else {
234 s->img_count++;
235 s->img_number++;
236 return 0;
237 }
238}
239
240static int img_read_close(AVFormatContext *s1)
241{
242 return 0;
243}
244
245/******************************************************/
246/* image output */
247
248static int img_write_header(AVFormatContext *s)
249{
250 VideoData *img = s->priv_data;
251
252 img->img_number = 1;
253 strcpy(img->path, s->filename);
254
255 /* find format */
256 if (s->oformat->flags & AVFMT_NOFILE)
257 img->is_pipe = 0;
258 else
259 img->is_pipe = 1;
260
261 return 0;
262}
263
264static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
265{
266 VideoData *img = s->priv_data;
267 ByteIOContext pb1, *pb;
268 char filename[1024];
269
270 if (!img->is_pipe) {
271 if (get_frame_filename(filename, sizeof(filename),
61fb3183 272 img->path, img->img_number) < 0 && img->img_number>1)
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273 return AVERROR_IO;
274 pb = &pb1;
275 if (url_fopen(pb, filename, URL_WRONLY) < 0)
276 return AVERROR_IO;
277 } else {
278 pb = &s->pb;
279 }
280
281 put_buffer(pb, pkt->data, pkt->size);
282 put_flush_packet(pb);
283 if (!img->is_pipe) {
284 url_fclose(pb);
285 }
286
287 img->img_number++;
288 return 0;
289}
290
291static int img_write_trailer(AVFormatContext *s)
292{
293 return 0;
294}
295
296/* input */
297
298static AVInputFormat image2_iformat = {
299 "image2",
300 "image2 sequence",
301 sizeof(VideoData),
302 image_probe,
303 img_read_header,
304 img_read_packet,
305 img_read_close,
306 NULL,
307 NULL,
61fb3183 308 AVFMT_NOFILE,
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309};
310
311static AVInputFormat image2pipe_iformat = {
312 "image2pipe",
313 "piped image2 sequence",
314 sizeof(VideoData),
315 NULL, /* no probe */
316 img_read_header,
317 img_read_packet,
318 img_read_close,
319 NULL,
320};
321
322
323/* output */
324
325static AVOutputFormat image2_oformat = {
326 "image2",
327 "image2 sequence",
328 "",
329 "",
330 sizeof(VideoData),
331 CODEC_ID_NONE,
332 CODEC_ID_MJPEG,
333 img_write_header,
334 img_write_packet,
335 img_write_trailer,
61fb3183 336 AVFMT_NOFILE,
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337};
338
339static AVOutputFormat image2pipe_oformat = {
340 "image2pipe",
341 "piped image2 sequence",
342 "",
343 "",
344 sizeof(VideoData),
345 CODEC_ID_NONE,
346 CODEC_ID_MJPEG,
347 img_write_header,
348 img_write_packet,
349 img_write_trailer,
350};
351
352int img2_init(void)
353{
354 av_register_input_format(&image2_iformat);
355 av_register_output_format(&image2_oformat);
356
357 av_register_input_format(&image2pipe_iformat);
358 av_register_output_format(&image2pipe_oformat);
359
360 return 0;
361}