LCOV - code coverage report
Current view: top level - libavcodec - vp9_parser.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 17 18 94.4 %
Date: 2017-12-16 01:21:47 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * VP9 compatible video decoder
       3             :  *
       4             :  * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
       5             :  * Copyright (C) 2013 Clément Bœsch <u pkh me>
       6             :  *
       7             :  * This file is part of FFmpeg.
       8             :  *
       9             :  * FFmpeg is free software; you can redistribute it and/or
      10             :  * modify it under the terms of the GNU Lesser General Public
      11             :  * License as published by the Free Software Foundation; either
      12             :  * version 2.1 of the License, or (at your option) any later version.
      13             :  *
      14             :  * FFmpeg is distributed in the hope that it will be useful,
      15             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      16             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      17             :  * Lesser General Public License for more details.
      18             :  *
      19             :  * You should have received a copy of the GNU Lesser General Public
      20             :  * License along with FFmpeg; if not, write to the Free Software
      21             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      22             :  */
      23             : 
      24             : #include "libavutil/intreadwrite.h"
      25             : #include "libavcodec/get_bits.h"
      26             : #include "parser.h"
      27             : 
      28        2266 : static int parse(AVCodecParserContext *ctx,
      29             :                  AVCodecContext *avctx,
      30             :                  const uint8_t **out_data, int *out_size,
      31             :                  const uint8_t *data, int size)
      32             : {
      33             :     GetBitContext gb;
      34             :     int res, profile, keyframe;
      35             : 
      36        2266 :     *out_data = data;
      37        2266 :     *out_size = size;
      38             : 
      39        2266 :     if ((res = init_get_bits8(&gb, data, size)) < 0)
      40           0 :         return size; // parsers can't return errors
      41        2266 :     get_bits(&gb, 2); // frame marker
      42        2266 :     profile  = get_bits1(&gb);
      43        2266 :     profile |= get_bits1(&gb) << 1;
      44        2266 :     if (profile == 3) profile += get_bits1(&gb);
      45             : 
      46        2266 :     if (get_bits1(&gb)) {
      47          17 :         keyframe = 0;
      48             :     } else {
      49        2249 :         keyframe  = !get_bits1(&gb);
      50             :     }
      51             : 
      52        2266 :     if (!keyframe) {
      53        1811 :         ctx->pict_type = AV_PICTURE_TYPE_P;
      54        1811 :         ctx->key_frame = 0;
      55             :     } else {
      56         455 :         ctx->pict_type = AV_PICTURE_TYPE_I;
      57         455 :         ctx->key_frame = 1;
      58             :     }
      59             : 
      60        2266 :     return size;
      61             : }
      62             : 
      63             : AVCodecParser ff_vp9_parser = {
      64             :     .codec_ids      = { AV_CODEC_ID_VP9 },
      65             :     .parser_parse   = parse,
      66             : };

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