3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 * Copyright (c) 2004 Michael Niedermayer
6 * This file is part of Libav.
8 * Libav 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.
13 * Libav 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.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavutil/avstring.h"
24 #include "libavutil/log.h"
25 #include "libavutil/opt.h"
26 #include "libavutil/pixdesc.h"
27 #include "libavutil/parseutils.h"
32 const AVClass *class; /**< Class for private options. */
39 char *pixel_format; /**< Set by a private option. */
40 char *video_size; /**< Set by a private option. */
41 char *framerate; /**< Set by a private option. */
46 static const int sizes[][2] = {
58 static int infer_size(int *width_ptr, int *height_ptr, int size)
62 for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
63 if ((sizes[i][0] * sizes[i][1]) == size) {
64 *width_ptr = sizes[i][0];
65 *height_ptr = sizes[i][1];
72 /* return -1 if no image found */
73 static int find_image_range(int *pfirst_index, int *plast_index,
74 const char *path, int max_start)
77 int range, last_index, range1, first_index;
79 /* find the first image */
80 for (first_index = 0; first_index < max_start; first_index++) {
81 if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
84 if (avio_check(buf, AVIO_FLAG_READ) > 0)
88 if (avio_check(buf, AVIO_FLAG_READ) > 0)
94 /* find the last image */
95 last_index = first_index;
103 if (av_get_frame_filename(buf, sizeof(buf), path,
104 last_index + range1) < 0)
106 if (avio_check(buf, AVIO_FLAG_READ) <= 0)
109 /* just in case... */
110 if (range >= (1 << 30))
113 /* we are sure than image last_index + range exists */
118 *pfirst_index = first_index;
119 *plast_index = last_index;
126 static int read_probe(AVProbeData *p)
128 if (p->filename && ff_guess_image2_codec(p->filename)) {
129 if (av_filename_number_test(p->filename))
130 return AVPROBE_SCORE_MAX;
132 return AVPROBE_SCORE_MAX/2;
137 static int read_header(AVFormatContext *s1)
139 VideoDemuxData *s = s1->priv_data;
140 int first_index, last_index, ret = 0;
141 int width = 0, height = 0;
143 enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE;
144 AVRational framerate;
146 s1->ctx_flags |= AVFMTCTX_NOHEADER;
148 st = avformat_new_stream(s1, NULL);
150 return AVERROR(ENOMEM);
153 if (s->pixel_format && (pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
154 av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n", s->pixel_format);
155 return AVERROR(EINVAL);
157 if (s->video_size && (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
158 av_log(s, AV_LOG_ERROR, "Could not parse video size: %s.\n", s->video_size);
161 if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
162 av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s->framerate);
166 av_strlcpy(s->path, s1->filename, sizeof(s->path));
171 if (s1->iformat->flags & AVFMT_NOFILE)
175 st->need_parsing = AVSTREAM_PARSE_FULL;
178 avpriv_set_pts_info(st, 60, framerate.den, framerate.num);
180 if (width && height) {
181 st->codec->width = width;
182 st->codec->height = height;
186 if (find_image_range(&first_index, &last_index, s->path,
187 FFMAX(s->start_number, 5)) < 0)
188 return AVERROR(ENOENT);
189 s->img_first = first_index;
190 s->img_last = last_index;
191 s->img_number = first_index;
192 /* compute duration */
194 st->duration = last_index - first_index + 1;
197 if(s1->video_codec_id){
198 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
199 st->codec->codec_id = s1->video_codec_id;
200 }else if(s1->audio_codec_id){
201 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
202 st->codec->codec_id = s1->audio_codec_id;
204 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
205 st->codec->codec_id = ff_guess_image2_codec(s->path);
207 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pix_fmt != AV_PIX_FMT_NONE)
208 st->codec->pix_fmt = pix_fmt;
213 static int read_packet(AVFormatContext *s1, AVPacket *pkt)
215 VideoDemuxData *s = s1->priv_data;
218 int size[3]={0}, ret[3]={0};
219 AVIOContext *f[3] = {NULL};
220 AVCodecContext *codec= s1->streams[0]->codec;
223 /* loop over input */
224 if (s->loop && s->img_number > s->img_last) {
225 s->img_number = s->img_first;
227 if (s->img_number > s->img_last)
229 if (av_get_frame_filename(filename, sizeof(filename),
230 s->path, s->img_number)<0 && s->img_number > 1)
233 if (avio_open2(&f[i], filename, AVIO_FLAG_READ,
234 &s1->interrupt_callback, NULL) < 0) {
237 av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename);
240 size[i]= avio_size(f[i]);
242 if(codec->codec_id != AV_CODEC_ID_RAWVIDEO)
244 filename[ strlen(filename) - 1 ]= 'U' + i;
247 if(codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->width)
248 infer_size(&codec->width, &codec->height, size[0]);
251 if (f[0]->eof_reached)
256 av_new_packet(pkt, size[0] + size[1] + size[2]);
257 pkt->stream_index = 0;
258 pkt->flags |= AV_PKT_FLAG_KEY;
263 ret[i]= avio_read(f[i], pkt->data + pkt->size, size[i]);
271 if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
273 return AVERROR(EIO); /* signal EOF */
281 #define OFFSET(x) offsetof(VideoDemuxData, x)
282 #define DEC AV_OPT_FLAG_DECODING_PARAM
283 static const AVOption options[] = {
284 { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
285 { "video_size", "", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
286 { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
287 { "loop", "", OFFSET(loop), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC },
288 { "start_number", "first number in the sequence", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, DEC },
292 #if CONFIG_IMAGE2_DEMUXER
293 static const AVClass img2_class = {
294 .class_name = "image2 demuxer",
295 .item_name = av_default_item_name,
297 .version = LIBAVUTIL_VERSION_INT,
299 AVInputFormat ff_image2_demuxer = {
301 .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
302 .priv_data_size = sizeof(VideoDemuxData),
303 .read_probe = read_probe,
304 .read_header = read_header,
305 .read_packet = read_packet,
306 .flags = AVFMT_NOFILE,
307 .priv_class = &img2_class,
310 #if CONFIG_IMAGE2PIPE_DEMUXER
311 static const AVClass img2pipe_class = {
312 .class_name = "image2pipe demuxer",
313 .item_name = av_default_item_name,
315 .version = LIBAVUTIL_VERSION_INT,
317 AVInputFormat ff_image2pipe_demuxer = {
318 .name = "image2pipe",
319 .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
320 .priv_data_size = sizeof(VideoDemuxData),
321 .read_header = read_header,
322 .read_packet = read_packet,
323 .priv_class = &img2pipe_class,