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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 FFmpeg.
  6.  *
  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.
  11.  *
  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.
  16.  *
  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
  20.  */
  21. #include "avformat.h"
  22.  
  23. /* Multipart JPEG */
  24.  
  25. #define BOUNDARY_TAG "ffserver"
  26.  
  27. static int mpjpeg_write_header(AVFormatContext *s)
  28. {
  29.     uint8_t buf1[256];
  30.  
  31.     snprintf(buf1, sizeof(buf1), "--%s\r\n", BOUNDARY_TAG);
  32.     avio_write(s->pb, buf1, strlen(buf1));
  33.     avio_flush(s->pb);
  34.     return 0;
  35. }
  36.  
  37. static int mpjpeg_write_packet(AVFormatContext *s, AVPacket *pkt)
  38. {
  39.     uint8_t buf1[256];
  40.  
  41.     snprintf(buf1, sizeof(buf1), "Content-type: image/jpeg\r\n");
  42.     avio_write(s->pb, buf1, strlen(buf1));
  43.  
  44.     snprintf(buf1, sizeof(buf1), "Content-length: %d\r\n\r\n", pkt->size);
  45.     avio_write(s->pb, buf1, strlen(buf1));
  46.     avio_write(s->pb, pkt->data, pkt->size);
  47.  
  48.     snprintf(buf1, sizeof(buf1), "\r\n--%s\r\n", BOUNDARY_TAG);
  49.     avio_write(s->pb, buf1, strlen(buf1));
  50.     return 0;
  51. }
  52.  
  53. static int mpjpeg_write_trailer(AVFormatContext *s)
  54. {
  55.     return 0;
  56. }
  57.  
  58. AVOutputFormat ff_mpjpeg_muxer = {
  59.     .name              = "mpjpeg",
  60.     .long_name         = NULL_IF_CONFIG_SMALL("MIME multipart JPEG"),
  61.     .mime_type         = "multipart/x-mixed-replace;boundary=" BOUNDARY_TAG,
  62.     .extensions        = "mjpg",
  63.     .audio_codec       = AV_CODEC_ID_NONE,
  64.     .video_codec       = AV_CODEC_ID_MJPEG,
  65.     .write_header      = mpjpeg_write_header,
  66.     .write_packet      = mpjpeg_write_packet,
  67.     .write_trailer     = mpjpeg_write_trailer,
  68. };
  69.