/*
  * Multipart JPEG format

  * Copyright (c) 2000, 2001, 2002, 2003 Fabrice Bellard

  *

  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either

  * version 2.1 of the License, or (at your option) any later version.

  *

  * FFmpeg is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  */

 #include "libavutil/opt.h"

 #include "avformat.h"
 
 /* Multipart JPEG */
 
 #define BOUNDARY_TAG "ffserver"
 

 typedef struct MPJPEGContext {
     AVClass *class;
     char *boundary_tag;
 } MPJPEGContext;
 

 static int mpjpeg_write_header(AVFormatContext *s)
 {

     MPJPEGContext *mpj = s->priv_data;

     avio_printf(s->pb, "--%s\r\n", mpj->boundary_tag);

     avio_flush(s->pb);

     return 0;
 }
 

 static int mpjpeg_write_packet(AVFormatContext *s, AVPacket *pkt)

 {

     MPJPEGContext *mpj = s->priv_data;

     avio_printf(s->pb, "Content-type: image/jpeg\r\n");

     avio_printf(s->pb, "Content-length: %d\r\n\r\n",

                 pkt->size);

     avio_write(s->pb, pkt->data, pkt->size);

     avio_printf(s->pb, "\r\n--%s\r\n", mpj->boundary_tag);

     return 0;
 }
 
 static int mpjpeg_write_trailer(AVFormatContext *s)
 {
     return 0;
 }
 

 static const AVOption options[] = {
     { "boundary_tag",    "Boundary tag", offsetof(MPJPEGContext, boundary_tag),   AV_OPT_TYPE_STRING, {.str = BOUNDARY_TAG}, .flags = AV_OPT_FLAG_ENCODING_PARAM },
     { NULL },
 };
 
 static const AVClass mpjpeg_muxer_class = {
     .class_name = "mpjpeg_muxer",
     .item_name  = av_default_item_name,
     .option     = options,
     .version    = LIBAVUTIL_VERSION_INT,
 };
 

 AVOutputFormat ff_mpjpeg_muxer = {

     .name              = "mpjpeg",

     .long_name         = NULL_IF_CONFIG_SMALL("MIME multipart JPEG"),

     .mime_type         = "multipart/x-mixed-replace;boundary=" BOUNDARY_TAG,
     .extensions        = "mjpg",

     .priv_data_size    = sizeof(MPJPEGContext),

     .audio_codec       = AV_CODEC_ID_NONE,
     .video_codec       = AV_CODEC_ID_MJPEG,

     .write_header      = mpjpeg_write_header,
     .write_packet      = mpjpeg_write_packet,
     .write_trailer     = mpjpeg_write_trailer,

     .flags             = AVFMT_NOTIMESTAMPS,

     .priv_class        = &mpjpeg_muxer_class,

 };