libavformat/rtp_asf.c

   1 /*
   2  * Microsoft RTP/ASF support.
   3  * Copyright (c) 2008 Ronald S. Bultje
   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
  22 /**
  23  * @file libavformat/rtp_asf.c
  24  * @brief Microsoft RTP/ASF support
  25  * @author Ronald S. Bultje <rbultje@ronald.bitfreak.net>
  26  */
  27
  28 #include <libavutil/base64.h>
  29 #include <libavutil/avstring.h>
  30 #include "rtp.h"
  31 #include "rtp_asf.h"
  32 #include "rtsp.h"
  33 #include "asf.h"
  34
  35 void ff_wms_parse_sdp_a_line(AVFormatContext *s, const char *p)
  36 {
  37     if (av_strstart(p, "pgmpu:data:application/vnd.ms.wms-hdr.asfv1;base64,", &p)) {
  38         ByteIOContext pb;
  39         RTSPState *rt = s->priv_data;
  40         int len = strlen(p) * 6 / 8;
  41         char *buf = av_mallocz(len);
  42         av_base64_decode(buf, p, len);
  43
  44         init_put_byte(&pb, buf, len, 0, NULL, NULL, NULL, NULL);
  45         if (rt->asf_ctx) {
  46             av_close_input_stream(rt->asf_ctx);
  47             rt->asf_ctx = NULL;
  48         }
  49         av_open_input_stream(&rt->asf_ctx, &pb, "", &asf_demuxer, NULL);
  50         av_free(buf);
  51         rt->asf_ctx->pb = NULL;
  52     }
  53 }
  54
  55 static int
  56 asfrtp_parse_sdp_line (AVFormatContext *s, int stream_index,
  57                        PayloadContext *asf, const char *line)
  58 {
  59     if (av_strstart(line, "stream:", &line)) {
  60         RTSPState *rt = s->priv_data;
  61
  62         s->streams[stream_index]->id = strtol(line, NULL, 10);
  63
  64         if (rt->asf_ctx) {
  65             int i;
  66
  67             for (i = 0; i < rt->asf_ctx->nb_streams; i++) {
  68                 if (s->streams[stream_index]->id == rt->asf_ctx->streams[i]->id) {
  69                     *s->streams[stream_index]->codec =
  70                         *rt->asf_ctx->streams[i]->codec;
  71                     rt->asf_ctx->streams[i]->codec->extradata_size = 0;
  72                     rt->asf_ctx->streams[i]->codec->extradata = NULL;
  73                     av_set_pts_info(s->streams[stream_index], 32, 1, 1000);
  74                 }
  75            }
  76         }
  77     }
  78
  79     return 0;
  80 }
  81
  82 #define RTP_ASF_HANDLER(n, s, t) \
  83 RTPDynamicProtocolHandler ff_ms_rtp_ ## n ## _handler = { \
  84     s, \
  85     t, \
  86     CODEC_ID_NONE, \
  87     asfrtp_parse_sdp_line, \
  88 };
  89
  90 RTP_ASF_HANDLER(asf_pfv, "x-asf-pf",  CODEC_TYPE_VIDEO);
  91 RTP_ASF_HANDLER(asf_pfa, "x-asf-pf",  CODEC_TYPE_AUDIO);