LCOV - code coverage report
Current view: top level - libavformat - rtpdec_dv.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 35 0.0 %
Date: 2017-12-12 11:08:38 Functions: 0 4 0.0 %

          Line data    Source code
       1             : /*
       2             :  * RTP parser for DV payload format (RFC 6469)
       3             :  * Copyright (c) 2015 Thomas Volkert <thomas@homer-conferencing.com>
       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             : #include "libavutil/avstring.h"
      23             : 
      24             : #include "libavcodec/bytestream.h"
      25             : 
      26             : #include "avio_internal.h"
      27             : #include "rtpdec_formats.h"
      28             : 
      29             : struct PayloadContext {
      30             :     AVIOContext *buf;
      31             :     uint32_t    timestamp;
      32             :     int         bundled_audio;
      33             : };
      34             : 
      35           0 : static av_cold void dv_close_context(PayloadContext *data)
      36             : {
      37           0 :     ffio_free_dyn_buf(&data->buf);
      38           0 : }
      39             : 
      40           0 : static av_cold int dv_sdp_parse_fmtp_config(AVFormatContext *s,
      41             :                                             AVStream *stream,
      42             :                                             PayloadContext *dv_data,
      43             :                                             const char *attr, const char *value)
      44             : {
      45             :     /* does the DV stream include audio? */
      46           0 :     if (!strcmp(attr, "audio") && !strcmp(value, "bundled"))
      47           0 :         dv_data->bundled_audio = 1;
      48             : 
      49             :     /* extract the DV profile */
      50           0 :     if (!strcmp(attr, "encode")) {
      51             :         /* SD-VCR/525-60 */
      52             :         /* SD-VCR/625-50 */
      53             :         /* HD-VCR/1125-60 */
      54             :         /* HD-VCR/1250-50 */
      55             :         /* SDL-VCR/525-60 */
      56             :         /* SDL-VCR/625-50 */
      57             :         /* 314M-25/525-60 */
      58             :         /* 314M-25/625-50 */
      59             :         /* 314M-50/525-60 */
      60             :         /* 314M-50/625-50 */
      61             :         /* 370M/1080-60i */
      62             :         /* 370M/1080-50i */
      63             :         /* 370M/720-60p */
      64             :         /* 370M/720-50p */
      65             :         /* 306M/525-60 (for backward compatibility) */
      66             :         /* 306M/625-50 (for backward compatibility) */
      67             :     }
      68             : 
      69           0 :     return 0;
      70             : }
      71             : 
      72           0 : static av_cold int dv_parse_sdp_line(AVFormatContext *ctx, int st_index,
      73             :                                      PayloadContext *dv_data, const char *line)
      74             : {
      75             :     AVStream *current_stream;
      76           0 :     const char *sdp_line_ptr = line;
      77             : 
      78           0 :     if (st_index < 0)
      79           0 :         return 0;
      80             : 
      81           0 :     current_stream = ctx->streams[st_index];
      82             : 
      83           0 :     if (av_strstart(sdp_line_ptr, "fmtp:", &sdp_line_ptr)) {
      84           0 :         return ff_parse_fmtp(ctx, current_stream, dv_data, sdp_line_ptr,
      85             :                              dv_sdp_parse_fmtp_config);
      86             :     }
      87             : 
      88           0 :     return 0;
      89             : }
      90             : 
      91           0 : static int dv_handle_packet(AVFormatContext *ctx, PayloadContext *rtp_dv_ctx,
      92             :                             AVStream *st, AVPacket *pkt, uint32_t *timestamp,
      93             :                             const uint8_t *buf, int len, uint16_t seq,
      94             :                             int flags)
      95             : {
      96           0 :     int res = 0;
      97             : 
      98             :     /* drop data of previous packets in case of non-continuous (lossy) packet stream */
      99           0 :     if (rtp_dv_ctx->buf && rtp_dv_ctx->timestamp != *timestamp) {
     100           0 :         ffio_free_dyn_buf(&rtp_dv_ctx->buf);
     101             :     }
     102             : 
     103             :     /* sanity check for size of input packet: 1 byte payload at least */
     104           0 :     if (len < 1) {
     105           0 :         av_log(ctx, AV_LOG_ERROR, "Too short RTP/DV packet, got %d bytes\n", len);
     106           0 :         return AVERROR_INVALIDDATA;
     107             :     }
     108             : 
     109             :     /* start frame buffering with new dynamic buffer */
     110           0 :     if (!rtp_dv_ctx->buf) {
     111           0 :         res = avio_open_dyn_buf(&rtp_dv_ctx->buf);
     112           0 :         if (res < 0)
     113           0 :             return res;
     114             :         /* update the timestamp in the frame packet with the one from the RTP packet */
     115           0 :         rtp_dv_ctx->timestamp = *timestamp;
     116             :     }
     117             : 
     118             :     /* write the fragment to the dyn. buffer */
     119           0 :     avio_write(rtp_dv_ctx->buf, buf, len);
     120             : 
     121             :     /* RTP marker bit means: last fragment of current frame was received;
     122             :        otherwise, an additional fragment is needed for the current frame */
     123           0 :     if (!(flags & RTP_FLAG_MARKER))
     124           0 :         return AVERROR(EAGAIN);
     125             : 
     126             :     /* close frame buffering and create resulting A/V packet */
     127           0 :     res = ff_rtp_finalize_packet(pkt, &rtp_dv_ctx->buf, st->index);
     128           0 :     if (res < 0)
     129           0 :         return res;
     130             : 
     131           0 :     return 0;
     132             : }
     133             : 
     134             : RTPDynamicProtocolHandler ff_dv_dynamic_handler = {
     135             :     .enc_name         = "DV",
     136             :     .codec_type       = AVMEDIA_TYPE_VIDEO,
     137             :     .codec_id         = AV_CODEC_ID_DVVIDEO,
     138             :     .need_parsing     = AVSTREAM_PARSE_FULL,
     139             :     .parse_sdp_a_line = dv_parse_sdp_line,
     140             :     .priv_data_size   = sizeof(PayloadContext),
     141             :     .close             = dv_close_context,
     142             :     .parse_packet     = dv_handle_packet,
     143             : };

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