LCOV - code coverage report
Current view: top level - libavcodec - dca_core_bsf.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 17 0.0 %
Date: 2017-12-15 18:13:28 Functions: 0 1 0.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2016 Paul B Mahol
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : #include "avcodec.h"
      22             : #include "bsf.h"
      23             : #include "bytestream.h"
      24             : #include "dca_syncwords.h"
      25             : #include "libavutil/mem.h"
      26             : 
      27           0 : static int dca_core_filter(AVBSFContext *ctx, AVPacket *out)
      28             : {
      29             :     AVPacket *in;
      30             :     GetByteContext gb;
      31             :     uint32_t syncword;
      32           0 :     int core_size = 0, ret;
      33             : 
      34           0 :     ret = ff_bsf_get_packet(ctx, &in);
      35           0 :     if (ret < 0)
      36           0 :         return ret;
      37             : 
      38           0 :     bytestream2_init(&gb, in->data, in->size);
      39           0 :     syncword = bytestream2_get_be32(&gb);
      40           0 :     bytestream2_skip(&gb, 1);
      41             : 
      42           0 :     switch (syncword) {
      43           0 :     case DCA_SYNCWORD_CORE_BE:
      44           0 :         core_size = ((bytestream2_get_be24(&gb) >> 4) & 0x3fff) + 1;
      45           0 :         break;
      46             :     }
      47             : 
      48           0 :     av_packet_move_ref(out, in);
      49           0 :     av_packet_free(&in);
      50             : 
      51           0 :     if (core_size > 0 && core_size <= out->size) {
      52           0 :         out->size = core_size;
      53             :     }
      54             : 
      55           0 :     return 0;
      56             : }
      57             : 
      58             : static const enum AVCodecID codec_ids[] = {
      59             :     AV_CODEC_ID_DTS, AV_CODEC_ID_NONE,
      60             : };
      61             : 
      62             : const AVBitStreamFilter ff_dca_core_bsf = {
      63             :     .name      = "dca_core",
      64             :     .filter    = dca_core_filter,
      65             :     .codec_ids = codec_ids,
      66             : };

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