LCOV - code coverage report
Current view: top level - libavformat - rtpenc_amr.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 27 0.0 %
Date: 2017-12-17 04:34:43 Functions: 0 1 0.0 %

          Line data    Source code
       1             : /*
       2             :  * RTP packetization for AMR audio
       3             :  * Copyright (c) 2007 Luca Abeni
       4             :  * Copyright (c) 2009 Martin Storsjo
       5             :  *
       6             :  * This file is part of FFmpeg.
       7             :  *
       8             :  * FFmpeg is free software; you can redistribute it and/or
       9             :  * modify it under the terms of the GNU Lesser General Public
      10             :  * License as published by the Free Software Foundation; either
      11             :  * version 2.1 of the License, or (at your option) any later version.
      12             :  *
      13             :  * FFmpeg is distributed in the hope that it will be useful,
      14             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16             :  * Lesser General Public License for more details.
      17             :  *
      18             :  * You should have received a copy of the GNU Lesser General Public
      19             :  * License along with FFmpeg; if not, write to the Free Software
      20             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      21             :  */
      22             : 
      23             : #include "avformat.h"
      24             : #include "rtpenc.h"
      25             : 
      26             : /**
      27             :  * Packetize AMR frames into RTP packets according to RFC 3267,
      28             :  * in octet-aligned mode.
      29             :  */
      30           0 : void ff_rtp_send_amr(AVFormatContext *s1, const uint8_t *buff, int size)
      31             : {
      32           0 :     RTPMuxContext *s          = s1->priv_data;
      33           0 :     AVStream *st              = s1->streams[0];
      34           0 :     int max_header_toc_size   = 1 + s->max_frames_per_packet;
      35             :     uint8_t *p;
      36             :     int len;
      37             : 
      38             :     /* Test if the packet must be sent. */
      39           0 :     len = s->buf_ptr - s->buf;
      40           0 :     if (s->num_frames &&
      41           0 :         (s->num_frames == s->max_frames_per_packet ||
      42           0 :          len + size - 1 > s->max_payload_size ||
      43           0 :          av_compare_ts(s->cur_timestamp - s->timestamp, st->time_base,
      44           0 :                        s1->max_delay, AV_TIME_BASE_Q) >= 0)) {
      45           0 :         int header_size = s->num_frames + 1;
      46           0 :         p = s->buf + max_header_toc_size - header_size;
      47           0 :         if (p != s->buf)
      48           0 :             memmove(p, s->buf, header_size);
      49             : 
      50           0 :         ff_rtp_send_data(s1, p, s->buf_ptr - p, 1);
      51             : 
      52           0 :         s->num_frames = 0;
      53             :     }
      54             : 
      55           0 :     if (!s->num_frames) {
      56           0 :         s->buf[0]    = 0xf0;
      57           0 :         s->buf_ptr   = s->buf + max_header_toc_size;
      58           0 :         s->timestamp = s->cur_timestamp;
      59             :     } else {
      60             :         /* Mark the previous TOC entry as having more entries following. */
      61           0 :         s->buf[1 + s->num_frames - 1] |= 0x80;
      62             :     }
      63             : 
      64             :     /* Copy the frame type and quality bits. */
      65           0 :     s->buf[1 + s->num_frames++] = buff[0] & 0x7C;
      66           0 :     buff++;
      67           0 :     size--;
      68           0 :     memcpy(s->buf_ptr, buff, size);
      69           0 :     s->buf_ptr += size;
      70           0 : }

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