libavcodec/hap.c

   1 /*
   2  * Vidvox Hap utility functions
   3  * Copyright (C) 2015 Tom Butterworth <bangnoise@gmail.com>
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file
  24  * Hap utilities
  25  */
  26 #include "hap.h"
  27
  28 int ff_hap_set_chunk_count(HapContext *ctx, int count, int first_in_frame)
  29 {
  30     int ret = 0;
  31     if (first_in_frame == 1 && ctx->chunk_count != count) {
  32         int ret = av_reallocp_array(&ctx->chunks, count, sizeof(HapChunk));
  33         if (ret == 0)
  34             ret = av_reallocp_array(&ctx->chunk_results, count, sizeof(int));
  35         if (ret < 0) {
  36             ctx->chunk_count = 0;
  37         } else {
  38             ctx->chunk_count = count;
  39         }
  40     } else if (ctx->chunk_count != count) {
  41         /* If this is not the first chunk count calculated for a frame and a
  42          * different count has already been encountered, then reject the frame:
  43          * each table in the Decode Instructions Container must describe the
  44          * same number of chunks. */
  45         ret = AVERROR_INVALIDDATA;
  46     }
  47     return ret;
  48 }
  49
  50 av_cold void ff_hap_free_context(HapContext *ctx)
  51 {
  52     av_freep(&ctx->tex_buf);
  53     av_freep(&ctx->chunks);
  54     av_freep(&ctx->chunk_results);
  55 }