mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
114 lines
3.5 KiB
C
114 lines
3.5 KiB
C
/*
|
|
* VC3/DNxHD decoder.
|
|
* Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot 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
|
|
*/
|
|
|
|
#ifndef AVCODEC_DNXHDDATA_H
|
|
#define AVCODEC_DNXHDDATA_H
|
|
|
|
#include <stdint.h>
|
|
#include "avcodec.h"
|
|
#include "libavutil/internal.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
|
|
/** Additional profile info flags */
|
|
#define DNXHD_INTERLACED (1<<0)
|
|
#define DNXHD_MBAFF (1<<1)
|
|
#define DNXHD_444 (1<<2)
|
|
|
|
/** Frame headers, extra 0x00 added to end for parser */
|
|
#define DNXHD_HEADER_INITIAL 0x000002800100
|
|
#define DNXHD_HEADER_444 0x000002800200
|
|
|
|
/** Indicate that a CIDEntry value must be read in the bitstream */
|
|
#define DNXHD_VARIABLE 0
|
|
|
|
typedef struct CIDEntry {
|
|
int cid;
|
|
unsigned int width, height;
|
|
unsigned int frame_size;
|
|
unsigned int coding_unit_size;
|
|
uint16_t flags;
|
|
int index_bits;
|
|
int bit_depth;
|
|
int eob_index;
|
|
const uint8_t *luma_weight, *chroma_weight;
|
|
const uint8_t *dc_codes, *dc_bits;
|
|
const uint16_t *ac_codes;
|
|
const uint8_t *ac_bits, *ac_info;
|
|
const uint16_t *run_codes;
|
|
const uint8_t *run_bits, *run;
|
|
int bit_rates[5]; ///< Helper to choose variants, rounded to nearest 5Mb/s
|
|
AVRational frame_rates[5];
|
|
AVRational packet_scale;
|
|
} CIDEntry;
|
|
|
|
extern const CIDEntry ff_dnxhd_cid_table[];
|
|
|
|
int ff_dnxhd_get_cid_table(int cid);
|
|
int ff_dnxhd_find_cid(AVCodecContext *avctx, int bit_depth);
|
|
void ff_dnxhd_print_profiles(AVCodecContext *avctx, int loglevel);
|
|
|
|
static av_always_inline uint64_t ff_dnxhd_check_header_prefix_hr(uint64_t prefix)
|
|
{
|
|
uint64_t data_offset = prefix >> 16;
|
|
if ((prefix & 0xFFFF0000FFFFLL) == 0x0300 &&
|
|
data_offset >= 0x0280 && data_offset <= 0x2170 &&
|
|
(data_offset & 3) == 0)
|
|
return prefix;
|
|
return 0;
|
|
}
|
|
|
|
static av_always_inline uint64_t ff_dnxhd_check_header_prefix(uint64_t prefix)
|
|
{
|
|
if (prefix == DNXHD_HEADER_INITIAL ||
|
|
prefix == DNXHD_HEADER_444 ||
|
|
ff_dnxhd_check_header_prefix_hr(prefix))
|
|
return prefix;
|
|
return 0;
|
|
}
|
|
|
|
static av_always_inline uint64_t ff_dnxhd_parse_header_prefix(const uint8_t *buf)
|
|
{
|
|
uint64_t prefix = AV_RB32(buf);
|
|
prefix = (prefix << 16) | buf[4] << 8;
|
|
return ff_dnxhd_check_header_prefix(prefix);
|
|
}
|
|
|
|
static av_always_inline int ff_dnxhd_get_hr_frame_size(int cid, int w, int h)
|
|
{
|
|
int result, i = ff_dnxhd_get_cid_table(cid);
|
|
|
|
if (i < 0)
|
|
return i;
|
|
|
|
result = ((h + 15) / 16) * ((w + 15) / 16) * (int64_t)ff_dnxhd_cid_table[i].packet_scale.num / ff_dnxhd_cid_table[i].packet_scale.den;
|
|
result = (result + 2048) / 4096 * 4096;
|
|
|
|
return FFMAX(result, 8192);
|
|
}
|
|
|
|
int avpriv_dnxhd_get_frame_size(int cid);
|
|
int avpriv_dnxhd_get_interlaced(int cid);
|
|
#if LIBAVCODEC_VERSION_MAJOR < 58
|
|
attribute_deprecated
|
|
uint64_t avpriv_dnxhd_parse_header_prefix(const uint8_t *buf);
|
|
#endif
|
|
#endif /* AVCODEC_DNXHDDATA_H */
|