2 * Multipart JPEG format
3 * Copyright (c) 2000, 2001, 2002, 2003 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg 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.
12 * FFmpeg 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/opt.h"
26 #define BOUNDARY_TAG "ffmpeg"
28 typedef struct MPJPEGContext {
33 static int mpjpeg_write_header(AVFormatContext *s)
35 MPJPEGContext *mpj = s->priv_data;
36 avio_printf(s->pb, "--%s\r\n", mpj->boundary_tag);
41 static int mpjpeg_write_packet(AVFormatContext *s, AVPacket *pkt)
43 MPJPEGContext *mpj = s->priv_data;
44 avio_printf(s->pb, "Content-type: image/jpeg\r\n");
45 avio_printf(s->pb, "Content-length: %d\r\n\r\n",
47 avio_write(s->pb, pkt->data, pkt->size);
49 avio_printf(s->pb, "\r\n--%s\r\n", mpj->boundary_tag);
53 static int mpjpeg_write_trailer(AVFormatContext *s)
58 static const AVOption options[] = {
59 { "boundary_tag", "Boundary tag", offsetof(MPJPEGContext, boundary_tag), AV_OPT_TYPE_STRING, {.str = BOUNDARY_TAG}, .flags = AV_OPT_FLAG_ENCODING_PARAM },
63 static const AVClass mpjpeg_muxer_class = {
64 .class_name = "mpjpeg_muxer",
65 .item_name = av_default_item_name,
67 .version = LIBAVUTIL_VERSION_INT,
70 AVOutputFormat ff_mpjpeg_muxer = {
72 .long_name = NULL_IF_CONFIG_SMALL("MIME multipart JPEG"),
73 .mime_type = "multipart/x-mixed-replace;boundary=" BOUNDARY_TAG,
75 .priv_data_size = sizeof(MPJPEGContext),
76 .audio_codec = AV_CODEC_ID_NONE,
77 .video_codec = AV_CODEC_ID_MJPEG,
78 .write_header = mpjpeg_write_header,
79 .write_packet = mpjpeg_write_packet,
80 .write_trailer = mpjpeg_write_trailer,
81 .flags = AVFMT_NOTIMESTAMPS,
82 .priv_class = &mpjpeg_muxer_class,