LCOV - code coverage report
Current view: top level - libavformat - rtpdec_mpegts.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 32 0.0 %
Date: 2017-12-18 06:23:41 Functions: 0 3 0.0 %

          Line data    Source code
       1             : /*
       2             :  * RTP MPEG2TS depacketizer
       3             :  * Copyright (c) 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             : 
      22             : #include "libavutil/attributes.h"
      23             : #include "mpegts.h"
      24             : #include "rtpdec_formats.h"
      25             : 
      26             : struct PayloadContext {
      27             :     struct MpegTSContext *ts;
      28             :     int read_buf_index;
      29             :     int read_buf_size;
      30             :     uint8_t buf[RTP_MAX_PACKET_LENGTH];
      31             : };
      32             : 
      33           0 : static void mpegts_close_context(PayloadContext *data)
      34             : {
      35           0 :     if (!data)
      36           0 :         return;
      37           0 :     if (data->ts)
      38           0 :         avpriv_mpegts_parse_close(data->ts);
      39             : }
      40             : 
      41           0 : static av_cold int mpegts_init(AVFormatContext *ctx, int st_index,
      42             :                                PayloadContext *data)
      43             : {
      44           0 :     data->ts = avpriv_mpegts_parse_open(ctx);
      45           0 :     if (!data->ts)
      46           0 :         return AVERROR(ENOMEM);
      47           0 :     return 0;
      48             : }
      49             : 
      50           0 : static int mpegts_handle_packet(AVFormatContext *ctx, PayloadContext *data,
      51             :                                 AVStream *st, AVPacket *pkt, uint32_t *timestamp,
      52             :                                 const uint8_t *buf, int len, uint16_t seq,
      53             :                                 int flags)
      54             : {
      55             :     int ret;
      56             : 
      57             :     // We don't want to use the RTP timestamps at all. If the mpegts demuxer
      58             :     // doesn't set any pts/dts, the generic rtpdec code shouldn't try to
      59             :     // fill it in either, since the mpegts and RTP timestamps are in totally
      60             :     // different ranges.
      61           0 :     *timestamp = RTP_NOTS_VALUE;
      62             : 
      63           0 :     if (!buf) {
      64           0 :         if (data->read_buf_index >= data->read_buf_size)
      65           0 :             return AVERROR(EAGAIN);
      66           0 :         ret = avpriv_mpegts_parse_packet(data->ts, pkt, data->buf + data->read_buf_index,
      67           0 :                                          data->read_buf_size - data->read_buf_index);
      68           0 :         if (ret < 0)
      69           0 :             return AVERROR(EAGAIN);
      70           0 :         data->read_buf_index += ret;
      71           0 :         if (data->read_buf_index < data->read_buf_size)
      72           0 :             return 1;
      73             :         else
      74           0 :             return 0;
      75             :     }
      76             : 
      77           0 :     ret = avpriv_mpegts_parse_packet(data->ts, pkt, buf, len);
      78             :     /* The only error that can be returned from avpriv_mpegts_parse_packet
      79             :      * is "no more data to return from the provided buffer", so return
      80             :      * AVERROR(EAGAIN) for all errors */
      81           0 :     if (ret < 0)
      82           0 :         return AVERROR(EAGAIN);
      83           0 :     if (ret < len) {
      84           0 :         data->read_buf_size = FFMIN(len - ret, sizeof(data->buf));
      85           0 :         memcpy(data->buf, buf + ret, data->read_buf_size);
      86           0 :         data->read_buf_index = 0;
      87           0 :         return 1;
      88             :     }
      89           0 :     return 0;
      90             : }
      91             : 
      92             : RTPDynamicProtocolHandler ff_mpegts_dynamic_handler = {
      93             :     .codec_type        = AVMEDIA_TYPE_DATA,
      94             :     .priv_data_size    = sizeof(PayloadContext),
      95             :     .parse_packet      = mpegts_handle_packet,
      96             :     .init              = mpegts_init,
      97             :     .close             = mpegts_close_context,
      98             :     .static_payload_id = 33,
      99             : };

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