mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/*
|
|
* 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;
|
|
}
|