FFmpeg
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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 FFmpeg.
7  *
8  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 "libavutil/opt.h"
27 #include "libavutil/pixdesc.h"
28 #include "avformat.h"
29 #include "avio_internal.h"
30 #include "internal.h"
31 #include "libavutil/opt.h"
32 
33 typedef struct {
34  const AVClass *class; /**< Class for private options. */
36  int is_pipe;
37  int split_planes; /**< use independent file for each Y, U, V plane */
38  char path[1024];
40 } VideoMuxData;
41 
43 {
45  AVStream *st = s->streams[0];
47  const char *str;
48 
49  av_strlcpy(img->path, s->filename, sizeof(img->path));
50 
51  /* find format */
52  if (s->oformat->flags & AVFMT_NOFILE)
53  img->is_pipe = 0;
54  else
55  img->is_pipe = 1;
56 
57  str = strrchr(img->path, '.');
58  img->split_planes = str
59  && !av_strcasecmp(str + 1, "y")
60  && s->nb_streams == 1
62  && desc
63  &&(desc->flags & PIX_FMT_PLANAR)
64  && desc->nb_components >= 3;
65  return 0;
66 }
67 
69 {
71  AVIOContext *pb[4];
72  char filename[1024];
73  AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
74  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(codec->pix_fmt);
75  int i;
76 
77  if (!img->is_pipe) {
78  if (av_get_frame_filename(filename, sizeof(filename),
79  img->path, img->img_number) < 0 && img->img_number > 1 && !img->updatefirst) {
81  "Could not get frame filename number %d from pattern '%s' (either set updatefirst or use a pattern like %%03d within the filename pattern)\n",
82  img->img_number, img->path);
83  return AVERROR(EINVAL);
84  }
85  for (i = 0; i < 4; i++) {
86  if (avio_open2(&pb[i], filename, AVIO_FLAG_WRITE,
87  &s->interrupt_callback, NULL) < 0) {
88  av_log(s, AV_LOG_ERROR, "Could not open file : %s\n", filename);
89  return AVERROR(EIO);
90  }
91 
92  if (!img->split_planes || i+1 >= desc->nb_components)
93  break;
94  filename[strlen(filename) - 1] = ((int[]){'U','V','A','x'})[i];
95  }
96  } else {
97  pb[0] = s->pb;
98  }
99 
100  if (img->split_planes) {
101  int ysize = codec->width * codec->height;
102  int usize = ((-codec->width)>>desc->log2_chroma_w) * ((-codec->height)>>desc->log2_chroma_h);
103  if (desc->comp[0].depth_minus1 >= 8) {
104  ysize *= 2;
105  usize *= 2;
106  }
107  avio_write(pb[0], pkt->data , ysize);
108  avio_write(pb[1], pkt->data + ysize , usize);
109  avio_write(pb[2], pkt->data + ysize + usize, usize);
110  avio_close(pb[1]);
111  avio_close(pb[2]);
112  if (desc->nb_components > 3) {
113  avio_write(pb[3], pkt->data + ysize + 2*usize, ysize);
114  avio_close(pb[3]);
115  }
116  } else {
117  avio_write(pb[0], pkt->data, pkt->size);
118  }
119  avio_flush(pb[0]);
120  if (!img->is_pipe) {
121  avio_close(pb[0]);
122  }
123 
124  img->img_number++;
125  return 0;
126 }
127 
128 #define OFFSET(x) offsetof(VideoMuxData, x)
129 #define ENC AV_OPT_FLAG_ENCODING_PARAM
130 static const AVOption muxoptions[] = {
131  { "updatefirst", "update the first image file", OFFSET(updatefirst), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
132  { "start_number", "set first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, ENC },
133  { NULL },
134 };
135 
136 #if CONFIG_IMAGE2_MUXER
137 static const AVClass img2mux_class = {
138  .class_name = "image2 muxer",
139  .item_name = av_default_item_name,
140  .option = muxoptions,
141  .version = LIBAVUTIL_VERSION_INT,
142 };
143 
144 AVOutputFormat ff_image2_muxer = {
145  .name = "image2",
146  .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
147  .extensions = "bmp,dpx,jls,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
148  "ppm,sgi,tga,tif,tiff,jp2,j2c,xwd,sun,ras,rs,im1,im8,im24,"
149  "sunras,xbm,xface",
150  .priv_data_size = sizeof(VideoMuxData),
151  .video_codec = AV_CODEC_ID_MJPEG,
155  .priv_class = &img2mux_class,
156 };
157 #endif
158 #if CONFIG_IMAGE2PIPE_MUXER
159 AVOutputFormat ff_image2pipe_muxer = {
160  .name = "image2pipe",
161  .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
162  .priv_data_size = sizeof(VideoMuxData),
163  .video_codec = AV_CODEC_ID_MJPEG,
167 };
168 #endif