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. */
45 static const int sizes[][2] = {
57 static int infer_size(int *width_ptr, int *height_ptr, int size)
61 for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
62 if ((sizes[i][0] * sizes[i][1]) == size) {
63 *width_ptr = sizes[i][0];
64 *height_ptr = sizes[i][1];
71 /* return -1 if no image found */
72 static int find_image_range(int *pfirst_index, int *plast_index,
76 int range, last_index, range1, first_index;
78 /* find the first image */
79 for(first_index = 0; first_index < 5; first_index++) {
80 if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
83 if (avio_check(buf, AVIO_FLAG_READ) > 0)
87 if (avio_check(buf, AVIO_FLAG_READ) > 0)
93 /* find the last image */
94 last_index = first_index;
102 if (av_get_frame_filename(buf, sizeof(buf), path,
103 last_index + range1) < 0)
105 if (avio_check(buf, AVIO_FLAG_READ) <= 0)
108 /* just in case... */
109 if (range >= (1 << 30))
112 /* we are sure than image last_index + range exists */
117 *pfirst_index = first_index;
118 *plast_index = last_index;
125 static int read_probe(AVProbeData *p)
127 if (p->filename && ff_guess_image2_codec(p->filename)) {
128 if (av_filename_number_test(p->filename))
129 return AVPROBE_SCORE_MAX;
131 return AVPROBE_SCORE_MAX/2;
136 static int read_header(AVFormatContext *s1)
138 VideoDemuxData *s = s1->priv_data;
139 int first_index, last_index, ret = 0;
140 int width = 0, height = 0;
142 enum PixelFormat pix_fmt = PIX_FMT_NONE;
143 AVRational framerate;
145 s1->ctx_flags |= AVFMTCTX_NOHEADER;
147 st = avformat_new_stream(s1, NULL);
149 return AVERROR(ENOMEM);
152 if (s->pixel_format && (pix_fmt = av_get_pix_fmt(s->pixel_format)) == PIX_FMT_NONE) {
153 av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n", s->pixel_format);
154 return AVERROR(EINVAL);
156 if (s->video_size && (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
157 av_log(s, AV_LOG_ERROR, "Could not parse video size: %s.\n", s->video_size);
160 if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
161 av_log(s, AV_LOG_ERROR, "Could not parse framerate: %s.\n", s->framerate);
165 av_strlcpy(s->path, s1->filename, sizeof(s->path));
170 if (s1->iformat->flags & AVFMT_NOFILE)
174 st->need_parsing = AVSTREAM_PARSE_FULL;
177 avpriv_set_pts_info(st, 60, framerate.den, framerate.num);
179 if (width && height) {
180 st->codec->width = width;
181 st->codec->height = height;
185 if (find_image_range(&first_index, &last_index, s->path) < 0)
186 return AVERROR(ENOENT);
187 s->img_first = first_index;
188 s->img_last = last_index;
189 s->img_number = first_index;
190 /* compute duration */
192 st->duration = last_index - first_index + 1;
195 if(s1->video_codec_id){
196 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
197 st->codec->codec_id = s1->video_codec_id;
198 }else if(s1->audio_codec_id){
199 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
200 st->codec->codec_id = s1->audio_codec_id;
202 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
203 st->codec->codec_id = ff_guess_image2_codec(s->path);
205 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pix_fmt != PIX_FMT_NONE)
206 st->codec->pix_fmt = pix_fmt;
211 static int read_packet(AVFormatContext *s1, AVPacket *pkt)
213 VideoDemuxData *s = s1->priv_data;
216 int size[3]={0}, ret[3]={0};
218 AVCodecContext *codec= s1->streams[0]->codec;
221 /* loop over input */
222 if (s->loop && s->img_number > s->img_last) {
223 s->img_number = s->img_first;
225 if (s->img_number > s->img_last)
227 if (av_get_frame_filename(filename, sizeof(filename),
228 s->path, s->img_number)<0 && s->img_number > 1)
231 if (avio_open2(&f[i], filename, AVIO_FLAG_READ,
232 &s1->interrupt_callback, NULL) < 0) {
235 av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",filename);
238 size[i]= avio_size(f[i]);
240 if(codec->codec_id != CODEC_ID_RAWVIDEO)
242 filename[ strlen(filename) - 1 ]= 'U' + i;
245 if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
246 infer_size(&codec->width, &codec->height, size[0]);
249 if (f[0]->eof_reached)
254 av_new_packet(pkt, size[0] + size[1] + size[2]);
255 pkt->stream_index = 0;
256 pkt->flags |= AV_PKT_FLAG_KEY;
261 ret[i]= avio_read(f[i], pkt->data + pkt->size, size[i]);
269 if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
271 return AVERROR(EIO); /* signal EOF */
279 #define OFFSET(x) offsetof(VideoDemuxData, x)
280 #define DEC AV_OPT_FLAG_DECODING_PARAM
281 static const AVOption options[] = {
282 { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
283 { "video_size", "", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
284 { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, DEC },
285 { "loop", "", OFFSET(loop), AV_OPT_TYPE_INT, {.dbl = 0}, 0, 1, DEC },
289 #if CONFIG_IMAGE2_DEMUXER
290 static const AVClass img2_class = {
291 .class_name = "image2 demuxer",
292 .item_name = av_default_item_name,
294 .version = LIBAVUTIL_VERSION_INT,
296 AVInputFormat ff_image2_demuxer = {
298 .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
299 .priv_data_size = sizeof(VideoDemuxData),
300 .read_probe = read_probe,
301 .read_header = read_header,
302 .read_packet = read_packet,
303 .flags = AVFMT_NOFILE,
304 .priv_class = &img2_class,
307 #if CONFIG_IMAGE2PIPE_DEMUXER
308 static const AVClass img2pipe_class = {
309 .class_name = "image2pipe demuxer",
310 .item_name = av_default_item_name,
312 .version = LIBAVUTIL_VERSION_INT,
314 AVInputFormat ff_image2pipe_demuxer = {
315 .name = "image2pipe",
316 .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
317 .priv_data_size = sizeof(VideoDemuxData),
318 .read_header = read_header,
319 .read_packet = read_packet,
320 .priv_class = &img2pipe_class,