| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Vidvox Hap utility functions | ||
| 3 | * Copyright (C) 2015 Tom Butterworth <bangnoise@gmail.com> | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg 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 | * FFmpeg 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 FFmpeg; 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 "libavutil/mem.h" | ||
| 27 | #include "hap.h" | ||
| 28 | |||
| 29 | 18 | int ff_hap_set_chunk_count(HapContext *ctx, int count, int first_in_frame) | |
| 30 | { | ||
| 31 | 18 | int ret = 0; | |
| 32 |
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27 | if (first_in_frame == 1 && ctx->chunk_count != count) { |
| 33 | 9 | int ret = av_reallocp_array(&ctx->chunks, count, sizeof(HapChunk)); | |
| 34 |
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9 | if (ret == 0) |
| 35 | 9 | ret = av_reallocp_array(&ctx->chunk_results, count, sizeof(int)); | |
| 36 |
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9 | if (ret < 0) { |
| 37 | ✗ | ctx->chunk_count = 0; | |
| 38 | } else { | ||
| 39 | 9 | ctx->chunk_count = count; | |
| 40 | } | ||
| 41 |
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9 | } else if (ctx->chunk_count != count) { |
| 42 | /* If this is not the first chunk count calculated for a frame and a | ||
| 43 | * different count has already been encountered, then reject the frame: | ||
| 44 | * each table in the Decode Instructions Container must describe the | ||
| 45 | * same number of chunks. */ | ||
| 46 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 47 | } | ||
| 48 | 18 | return ret; | |
| 49 | } | ||
| 50 | |||
| 51 | 28 | av_cold void ff_hap_free_context(HapContext *ctx) | |
| 52 | { | ||
| 53 | 28 | av_freep(&ctx->tex_buf); | |
| 54 | 28 | av_freep(&ctx->chunks); | |
| 55 | 28 | av_freep(&ctx->chunk_results); | |
| 56 | 28 | } | |
| 57 | |||
| 58 | 48 | int ff_hap_parse_section_header(GetByteContext *gbc, int *section_size, | |
| 59 | enum HapSectionType *section_type) | ||
| 60 | { | ||
| 61 |
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48 | if (bytestream2_get_bytes_left(gbc) < 4) |
| 62 | ✗ | return AVERROR_INVALIDDATA; | |
| 63 | |||
| 64 | 48 | *section_size = bytestream2_get_le24(gbc); | |
| 65 | 48 | *section_type = bytestream2_get_byte(gbc); | |
| 66 | |||
| 67 |
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48 | if (*section_size == 0) { |
| 68 |
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4 | if (bytestream2_get_bytes_left(gbc) < 4) |
| 69 | ✗ | return AVERROR_INVALIDDATA; | |
| 70 | |||
| 71 | 4 | *section_size = bytestream2_get_le32(gbc); | |
| 72 | } | ||
| 73 | |||
| 74 |
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48 | if (*section_size > bytestream2_get_bytes_left(gbc) || *section_size < 0) |
| 75 | ✗ | return AVERROR_INVALIDDATA; | |
| 76 | else | ||
| 77 | 48 | return 0; | |
| 78 | } | ||
| 79 |