Libav
mpjpeg.c
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1 /*
2  * Multipart JPEG format
3  * Copyright (c) 2000, 2001, 2002, 2003 Fabrice Bellard
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 #include "avformat.h"
22 
23 /* Multipart JPEG */
24 
25 #define BOUNDARY_TAG "avserver"
26 
28 {
29  uint8_t buf1[256];
30 
31  snprintf(buf1, sizeof(buf1), "--%s\n", BOUNDARY_TAG);
32  avio_write(s->pb, buf1, strlen(buf1));
33  avio_flush(s->pb);
34  return 0;
35 }
36 
38 {
39  uint8_t buf1[256];
40 
41  snprintf(buf1, sizeof(buf1), "Content-type: image/jpeg\n\n");
42  avio_write(s->pb, buf1, strlen(buf1));
43  avio_write(s->pb, pkt->data, pkt->size);
44 
45  snprintf(buf1, sizeof(buf1), "\n--%s\n", BOUNDARY_TAG);
46  avio_write(s->pb, buf1, strlen(buf1));
47  return 0;
48 }
49 
51 {
52  return 0;
53 }
54 
56  .name = "mpjpeg",
57  .long_name = NULL_IF_CONFIG_SMALL("MIME multipart JPEG"),
58  .mime_type = "multipart/x-mixed-replace;boundary=" BOUNDARY_TAG,
59  .extensions = "mjpg",
60  .audio_codec = AV_CODEC_ID_NONE,
61  .video_codec = AV_CODEC_ID_MJPEG,
62  .write_header = mpjpeg_write_header,
63  .write_packet = mpjpeg_write_packet,
64  .write_trailer = mpjpeg_write_trailer,
65  .flags = AVFMT_NOTIMESTAMPS,
66 };
static int mpjpeg_write_trailer(AVFormatContext *s)
Definition: mpjpeg.c:50
int size
Definition: avcodec.h:968
Format I/O context.
Definition: avformat.h:922
uint8_t
uint8_t * data
Definition: avcodec.h:967
AVOutputFormat ff_mpjpeg_muxer
Definition: mpjpeg.c:55
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:165
#define BOUNDARY_TAG
Definition: mpjpeg.c:25
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:150
int void avio_flush(AVIOContext *s)
Definition: aviobuf.c:180
const char * name
Definition: avformat.h:446
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:416
AVIOContext * pb
I/O context.
Definition: avformat.h:964
static int mpjpeg_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpjpeg.c:37
static int mpjpeg_write_header(AVFormatContext *s)
Definition: mpjpeg.c:27
Main libavformat public API header.
This structure stores compressed data.
Definition: avcodec.h:944