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,
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,
165 };
166 #endif
Bytestream IO Context.
Definition: avio.h:68
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1005
AVOption.
Definition: opt.h:233
#define OFFSET(x)
Definition: img2enc.c:127
int size
Definition: avcodec.h:916
Format I/O context.
Definition: avformat.h:828
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:38
int flags
can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_RAWPICTURE, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH, AVFMT_TS_NONSTRICT
Definition: avformat.h:395
AVOptions.
char path[1024]
Definition: img2enc.c:35
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1454
AVStream ** streams
Definition: avformat.h:876
static const AVOption muxoptions[]
Definition: img2enc.c:129
uint8_t * data
Definition: avcodec.h:915
static int flags
Definition: log.c:42
static int write_header(AVFormatContext *s)
Definition: img2enc.c:38
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:165
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:50
struct AVOutputFormat * oformat
Definition: avformat.h:842
static int write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: img2enc.c:53
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
Definition: aviobuf.c:782
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:146
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:67
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:641
int void avio_flush(AVIOContext *s)
Definition: aviobuf.c:180
char filename[1024]
input or output filename
Definition: avformat.h:878
int width
picture width / height.
Definition: avcodec.h:1508
const char * name
Definition: avformat.h:376
#define AV_RL32
Definition: intreadwrite.h:146
LIBAVUTIL_VERSION_INT
Definition: eval.c:52
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Return in 'buf' the path with 'd' replaced by a number.
Definition: utils.c:3043
Stream structure.
Definition: avformat.h:622
NULL
Definition: eval.c:52
int img_number
Definition: img2enc.c:33
enum AVCodecID codec_id
Definition: avcodec.h:1350
AVIOContext * pb
I/O context.
Definition: avformat.h:861
av_default_item_name
Definition: dnxhdenc.c:43
main external API structure.
Definition: avcodec.h:1339
int extradata_size
Definition: avcodec.h:1455
Describe the class of an AVClass context structure.
Definition: log.h:33
int avio_open2(AVIOContext **s, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create and initialize a AVIOContext for accessing the resource indicated by url.
Definition: aviobuf.c:765
#define ENC
Definition: img2enc.c:128
Main libavformat public API header.
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:88
int is_pipe
Definition: img2enc.c:34
void * priv_data
Format private data.
Definition: avformat.h:848
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:268
int stream_index
Definition: avcodec.h:917
This structure stores compressed data.
Definition: avcodec.h:898