/* * Vidvox Hap utility functions * Copyright (C) 2015 Tom Butterworth <bangnoise@gmail.com> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * Hap utilities */ #include "hap.h" int ff_hap_set_chunk_count(HapContext *ctx, int count, int first_in_frame) { int ret = 0; if (first_in_frame == 1 && ctx->chunk_count != count) { int ret = av_reallocp_array(&ctx->chunks, count, sizeof(HapChunk)); if (ret == 0) ret = av_reallocp_array(&ctx->chunk_results, count, sizeof(int)); if (ret < 0) { ctx->chunk_count = 0; } else { ctx->chunk_count = count; } } else if (ctx->chunk_count != count) { /* If this is not the first chunk count calculated for a frame and a * different count has already been encountered, then reject the frame: * each table in the Decode Instructions Container must describe the * same number of chunks. */ ret = AVERROR_INVALIDDATA; } return ret; } av_cold void ff_hap_free_context(HapContext *ctx) { av_freep(&ctx->tex_buf); av_freep(&ctx->chunks); av_freep(&ctx->chunk_results); } int ff_hap_parse_section_header(GetByteContext *gbc, int *section_size, enum HapSectionType *section_type) { if (bytestream2_get_bytes_left(gbc) < 4) return AVERROR_INVALIDDATA; *section_size = bytestream2_get_le24(gbc); *section_type = bytestream2_get_byte(gbc); if (*section_size == 0) { if (bytestream2_get_bytes_left(gbc) < 4) return AVERROR_INVALIDDATA; *section_size = bytestream2_get_le32(gbc); } if (*section_size > bytestream2_get_bytes_left(gbc) || *section_size < 0) return AVERROR_INVALIDDATA; else return 0; }