Remove commented-out NUT muxer entry, can be added once we have a native muxer.
[ffmpeg.git] / libavformat / img.c
1 /*
2  * Image format
3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 #include "avformat.h"
22
23 typedef struct {
24     int width;
25     int height;
26     int img_first;
27     int img_last;
28     int img_number;
29     int img_count;
30     int img_size;
31     AVImageFormat *img_fmt;
32     int pix_fmt;
33     int is_pipe;
34     char path[1024];
35     /* temporary usage */
36     void *ptr;
37 } VideoData;
38
39
40 /* return -1 if no image found */
41 static int find_image_range(int *pfirst_index, int *plast_index,
42                             const char *path)
43 {
44     char buf[1024];
45     int range, last_index, range1, first_index;
46
47     /* find the first image */
48     for(first_index = 0; first_index < 5; first_index++) {
49         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0)
50             goto fail;
51         if (url_exist(buf))
52             break;
53     }
54     if (first_index == 5)
55         goto fail;
56
57     /* find the last image */
58     last_index = first_index;
59     for(;;) {
60         range = 0;
61         for(;;) {
62             if (!range)
63                 range1 = 1;
64             else
65                 range1 = 2 * range;
66             if (av_get_frame_filename(buf, sizeof(buf), path,
67                                       last_index + range1) < 0)
68                 goto fail;
69             if (!url_exist(buf))
70                 break;
71             range = range1;
72             /* just in case... */
73             if (range >= (1 << 30))
74                 goto fail;
75         }
76         /* we are sure than image last_index + range exists */
77         if (!range)
78             break;
79         last_index += range;
80     }
81     *pfirst_index = first_index;
82     *plast_index = last_index;
83     return 0;
84  fail:
85     return -1;
86 }
87
88
89 static int image_probe(AVProbeData *p)
90 {
91     if (av_filename_number_test(p->filename) && guess_image_format(p->filename))
92         return AVPROBE_SCORE_MAX-1;
93     else
94         return 0;
95 }
96
97 static int read_header_alloc_cb(void *opaque, AVImageInfo *info)
98 {
99     VideoData *s = opaque;
100
101     s->width = info->width;
102     s->height = info->height;
103     s->pix_fmt = info->pix_fmt;
104     /* stop image reading but no error */
105     return 1;
106 }
107
108 static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
109 {
110     VideoData *s = s1->priv_data;
111     int ret, first_index, last_index;
112     char buf[1024];
113     ByteIOContext pb1, *f = &pb1;
114     AVStream *st;
115
116     st = av_new_stream(s1, 0);
117     if (!st) {
118         return -ENOMEM;
119     }
120
121     if (ap->image_format)
122         s->img_fmt = ap->image_format;
123
124     pstrcpy(s->path, sizeof(s->path), s1->filename);
125     s->img_number = 0;
126     s->img_count = 0;
127
128     /* find format */
129     if (s1->iformat->flags & AVFMT_NOFILE)
130         s->is_pipe = 0;
131     else
132         s->is_pipe = 1;
133
134     if (!ap->time_base.num) {
135         st->codec->time_base= (AVRational){1,25};
136     } else {
137         st->codec->time_base= ap->time_base;
138     }
139
140     if (!s->is_pipe) {
141         if (find_image_range(&first_index, &last_index, s->path) < 0)
142             goto fail;
143         s->img_first = first_index;
144         s->img_last = last_index;
145         s->img_number = first_index;
146         /* compute duration */
147         st->start_time = 0;
148         st->duration = last_index - first_index + 1;
149         if (av_get_frame_filename(buf, sizeof(buf), s->path, s->img_number) < 0)
150             goto fail;
151         if (url_fopen(f, buf, URL_RDONLY) < 0)
152             goto fail;
153     } else {
154         f = &s1->pb;
155     }
156
157     ret = av_read_image(f, s1->filename, s->img_fmt, read_header_alloc_cb, s);
158     if (ret < 0)
159         goto fail1;
160
161     if (!s->is_pipe) {
162         url_fclose(f);
163     } else {
164         url_fseek(f, 0, SEEK_SET);
165     }
166
167     st->codec->codec_type = CODEC_TYPE_VIDEO;
168     st->codec->codec_id = CODEC_ID_RAWVIDEO;
169     st->codec->width = s->width;
170     st->codec->height = s->height;
171     st->codec->pix_fmt = s->pix_fmt;
172     s->img_size = avpicture_get_size(s->pix_fmt, (s->width+15)&(~15), (s->height+15)&(~15));
173
174     return 0;
175  fail1:
176     if (!s->is_pipe)
177         url_fclose(f);
178  fail:
179     return AVERROR_IO;
180 }
181
182 static int read_packet_alloc_cb(void *opaque, AVImageInfo *info)
183 {
184     VideoData *s = opaque;
185
186     if (info->width != s->width ||
187         info->height != s->height)
188         return -1;
189     avpicture_fill(&info->pict, s->ptr, info->pix_fmt, (info->width+15)&(~15), (info->height+15)&(~15));
190     return 0;
191 }
192
193 static 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 (s1->loop_input && s->img_number > s->img_last) {
203             s->img_number = s->img_first;
204         }
205         if (av_get_frame_filename(filename, sizeof(filename),
206                                   s->path, s->img_number) < 0)
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     av_new_packet(pkt, s->img_size);
218     pkt->stream_index = 0;
219
220     s->ptr = pkt->data;
221     ret = av_read_image(f, filename, s->img_fmt, read_packet_alloc_cb, s);
222     if (!s->is_pipe) {
223         url_fclose(f);
224     }
225
226     if (ret < 0) {
227         av_free_packet(pkt);
228         return AVERROR_IO; /* signal EOF */
229     } else {
230         /* XXX: computing this pts is not necessary as it is done in
231            the generic code too */
232         pkt->pts = av_rescale((int64_t)s->img_count * s1->streams[0]->codec->time_base.num, s1->streams[0]->time_base.den, s1->streams[0]->codec->time_base.den) / s1->streams[0]->time_base.num;
233         s->img_count++;
234         s->img_number++;
235         return 0;
236     }
237 }
238
239 static int img_read_close(AVFormatContext *s1)
240 {
241     return 0;
242 }
243
244 /******************************************************/
245 /* image output */
246
247 static int img_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
248 {
249     VideoData *img = s->priv_data;
250     AVStream *st;
251     AVImageFormat *img_fmt;
252     int i;
253
254     /* find output image format */
255     if (ap->image_format) {
256         img_fmt = ap->image_format;
257     } else {
258         img_fmt = guess_image_format(s->filename);
259     }
260     if (!img_fmt)
261         return -1;
262
263     if (s->nb_streams != 1)
264         return -1;
265
266     st = s->streams[0];
267     /* we select the first matching format */
268     for(i=0;i<PIX_FMT_NB;i++) {
269         if (img_fmt->supported_pixel_formats & (1 << i))
270             break;
271     }
272     if (i >= PIX_FMT_NB)
273         return -1;
274     img->img_fmt = img_fmt;
275     img->pix_fmt = i;
276     st->codec->pix_fmt = img->pix_fmt;
277     return 0;
278 }
279
280 static int img_write_header(AVFormatContext *s)
281 {
282     VideoData *img = s->priv_data;
283
284     img->img_number = 1;
285     pstrcpy(img->path, sizeof(img->path), s->filename);
286
287     /* find format */
288     if (s->oformat->flags & AVFMT_NOFILE)
289         img->is_pipe = 0;
290     else
291         img->is_pipe = 1;
292
293     return 0;
294 }
295
296 static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
297 {
298     VideoData *img = s->priv_data;
299     AVStream *st = s->streams[pkt->stream_index];
300     ByteIOContext pb1, *pb;
301     AVPicture *picture;
302     int width, height, ret;
303     char filename[1024];
304     AVImageInfo info;
305
306     width = st->codec->width;
307     height = st->codec->height;
308
309     picture = (AVPicture *)pkt->data;
310
311     if (!img->is_pipe) {
312         if (av_get_frame_filename(filename, sizeof(filename),
313                                   img->path, img->img_number) < 0)
314             return AVERROR_IO;
315         pb = &pb1;
316         if (url_fopen(pb, filename, URL_WRONLY) < 0)
317             return AVERROR_IO;
318     } else {
319         pb = &s->pb;
320     }
321     info.width = width;
322     info.height = height;
323     info.pix_fmt = st->codec->pix_fmt;
324     info.interleaved = 0;    /* FIXME: there should be a way to set it right */
325     info.pict = *picture;
326     ret = av_write_image(pb, img->img_fmt, &info);
327     if (!img->is_pipe) {
328         url_fclose(pb);
329     }
330
331     img->img_number++;
332     return 0;
333 }
334
335 static int img_write_trailer(AVFormatContext *s)
336 {
337     return 0;
338 }
339
340 /* input */
341 #ifdef CONFIG_IMAGE_DEMUXER
342 AVInputFormat image_demuxer = {
343     "image",
344     "image sequence",
345     sizeof(VideoData),
346     image_probe,
347     img_read_header,
348     img_read_packet,
349     img_read_close,
350     NULL,
351     NULL,
352     AVFMT_NOFILE | AVFMT_NEEDNUMBER,
353 };
354 #endif
355 #ifdef CONFIG_IMAGEPIPE_DEMUXER
356 AVInputFormat imagepipe_demuxer = {
357     "imagepipe",
358     "piped image sequence",
359     sizeof(VideoData),
360     NULL, /* no probe */
361     img_read_header,
362     img_read_packet,
363     img_read_close,
364     NULL,
365 };
366 #endif
367
368 /* output */
369 #ifdef CONFIG_IMAGE_MUXER
370 AVOutputFormat image_muxer = {
371     "image",
372     "image sequence",
373     "",
374     "",
375     sizeof(VideoData),
376     CODEC_ID_NONE,
377     CODEC_ID_RAWVIDEO,
378     img_write_header,
379     img_write_packet,
380     img_write_trailer,
381     AVFMT_NOFILE | AVFMT_NEEDNUMBER | AVFMT_RAWPICTURE,
382     img_set_parameters,
383 };
384 #endif
385 #ifdef CONFIG_IMAGEPIPE_MUXER
386 AVOutputFormat imagepipe_muxer = {
387     "imagepipe",
388     "piped image sequence",
389     "",
390     "",
391     sizeof(VideoData),
392     CODEC_ID_NONE,
393     CODEC_ID_RAWVIDEO,
394     img_write_header,
395     img_write_packet,
396     img_write_trailer,
397     AVFMT_RAWPICTURE,
398     img_set_parameters,
399 };
400 #endif