img2enc.c
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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 file is part of Libav.
7  *
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.
12  *
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.
17  *
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
21  */
22 
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/log.h"
26 #include "avformat.h"
27 #include "avio_internal.h"
28 #include "internal.h"
29 #include "libavutil/opt.h"
30 
31 typedef struct {
32  const AVClass *class;
34  int is_pipe;
35  char path[1024];
36 } VideoMuxData;
37 
39 {
40  VideoMuxData *img = s->priv_data;
41 
42  av_strlcpy(img->path, s->filename, sizeof(img->path));
43 
44  /* find format */
45  if (s->oformat->flags & AVFMT_NOFILE)
46  img->is_pipe = 0;
47  else
48  img->is_pipe = 1;
49 
50  return 0;
51 }
52 
54 {
55  VideoMuxData *img = s->priv_data;
56  AVIOContext *pb[3];
57  char filename[1024];
58  AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
59  int i;
60 
61  if (!img->is_pipe) {
62  if (av_get_frame_filename(filename, sizeof(filename),
63  img->path, img->img_number) < 0 && img->img_number > 1) {
65  "Could not get frame filename number %d from pattern '%s'\n",
66  img->img_number, img->path);
67  return AVERROR(EIO);
68  }
69  for (i = 0; i < 3; i++) {
70  if (avio_open2(&pb[i], filename, AVIO_FLAG_WRITE,
71  &s->interrupt_callback, NULL) < 0) {
72  av_log(s, AV_LOG_ERROR, "Could not open file : %s\n", filename);
73  return AVERROR(EIO);
74  }
75 
76  if (codec->codec_id != AV_CODEC_ID_RAWVIDEO)
77  break;
78  filename[strlen(filename) - 1] = 'U' + i;
79  }
80  } else {
81  pb[0] = s->pb;
82  }
83 
84  if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
85  int ysize = codec->width * codec->height;
86  avio_write(pb[0], pkt->data, ysize);
87  avio_write(pb[1], pkt->data + ysize, (pkt->size - ysize) / 2);
88  avio_write(pb[2], pkt->data + ysize + (pkt->size - ysize) / 2, (pkt->size - ysize) / 2);
89  avio_close(pb[1]);
90  avio_close(pb[2]);
91  } else {
93  AVStream *st = s->streams[0];
94  if (st->codec->extradata_size > 8 &&
95  AV_RL32(st->codec->extradata + 4) == MKTAG('j', 'p', '2', 'h')) {
96  if (pkt->size < 8 ||
97  AV_RL32(pkt->data + 4) != MKTAG('j', 'p', '2', 'c'))
98  goto error;
99  avio_wb32(pb[0], 12);
100  ffio_wfourcc(pb[0], "jP ");
101  avio_wb32(pb[0], 0x0D0A870A); // signature
102  avio_wb32(pb[0], 20);
103  ffio_wfourcc(pb[0], "ftyp");
104  ffio_wfourcc(pb[0], "jp2 ");
105  avio_wb32(pb[0], 0);
106  ffio_wfourcc(pb[0], "jp2 ");
107  avio_write(pb[0], st->codec->extradata, st->codec->extradata_size);
108  } else if (pkt->size < 8 ||
109  (!st->codec->extradata_size &&
110  AV_RL32(pkt->data + 4) != MKTAG('j', 'P', ' ', ' '))) { // signature
111 error:
112  av_log(s, AV_LOG_ERROR, "malformed JPEG 2000 codestream\n");
113  return -1;
114  }
115  }
116  avio_write(pb[0], pkt->data, pkt->size);
117  }
118  avio_flush(pb[0]);
119  if (!img->is_pipe) {
120  avio_close(pb[0]);
121  }
122 
123  img->img_number++;
124  return 0;
125 }
126 
127 #define OFFSET(x) offsetof(VideoMuxData, x)
128 #define ENC AV_OPT_FLAG_ENCODING_PARAM
129 static const AVOption muxoptions[] = {
130  { "start_number", "first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, ENC },
131  { NULL },
132 };
133 
134 #if CONFIG_IMAGE2_MUXER
135 static const AVClass img2mux_class = {
136  .class_name = "image2 muxer",
137  .item_name = av_default_item_name,
138  .option = muxoptions,
139  .version = LIBAVUTIL_VERSION_INT,
140 };
141 
142 AVOutputFormat ff_image2_muxer = {
143  .name = "image2",
144  .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
145  .extensions = "bmp,dpx,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
146  "ppm,sgi,tga,tif,tiff,jp2,xwd,sun,ras,rs,im1,im8,im24,"
147  "sunras,xbm",
148  .priv_data_size = sizeof(VideoMuxData),
149  .video_codec = AV_CODEC_ID_MJPEG,
152  .flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE,
153  .priv_class = &img2mux_class,
154 };
155 #endif
156 #if CONFIG_IMAGE2PIPE_MUXER
157 AVOutputFormat ff_image2pipe_muxer = {
158  .name = "image2pipe",
159  .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
160  .priv_data_size = sizeof(VideoMuxData),
161  .video_codec = AV_CODEC_ID_MJPEG,
164  .flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
165 };
166 #endif