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/*
* VC3/DNxHD decoder. |
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* Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> |
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*
* 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
*/
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#ifndef AVCODEC_DNXHDDATA_H
#define AVCODEC_DNXHDDATA_H |
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|
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#include <stdint.h> |
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#include "avcodec.h" |
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#include "libavutil/internal.h" |
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#include "libavutil/intreadwrite.h" |
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|
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/** Additional profile info flags */
#define DNXHD_INTERLACED (1<<0) |
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#define DNXHD_MBAFF (1<<1)
#define DNXHD_444 (1<<2) |
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/** Frame headers, extra 0x00 added to end for parser */
#define DNXHD_HEADER_INITIAL 0x000002800100
#define DNXHD_HEADER_444 0x000002800200
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/** Indicate that a CIDEntry value must be read in the bitstream */
#define DNXHD_VARIABLE 0
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typedef struct CIDEntry { |
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int cid;
unsigned int width, height;
unsigned int frame_size;
unsigned int coding_unit_size; |
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uint16_t flags; |
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int index_bits;
int bit_depth; |
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int eob_index; |
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const uint8_t *luma_weight, *chroma_weight; |
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const uint8_t *dc_codes, *dc_bits;
const uint16_t *ac_codes; |
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const uint8_t *ac_bits, *ac_info; |
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const uint16_t *run_codes;
const uint8_t *run_bits, *run; |
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int bit_rates[5]; ///< Helper to choose variants, rounded to nearest 5Mb/s |
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AVRational packet_scale; |
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} CIDEntry;
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extern const CIDEntry ff_dnxhd_cid_table[]; |
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int ff_dnxhd_get_cid_table(int cid); |
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int ff_dnxhd_find_cid(AVCodecContext *avctx, int bit_depth); |
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void ff_dnxhd_print_profiles(AVCodecContext *avctx, int loglevel); |
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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 && |
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(data_offset & 3) == 0) |
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return prefix;
return 0;
}
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static av_always_inline uint64_t ff_dnxhd_check_header_prefix(uint64_t prefix)
{
if (prefix == DNXHD_HEADER_INITIAL ||
prefix == DNXHD_HEADER_444 || |
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ff_dnxhd_check_header_prefix_hr(prefix)) |
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return prefix;
return 0;
}
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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);
}
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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);
}
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int avpriv_dnxhd_get_frame_size(int cid); |
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int avpriv_dnxhd_get_interlaced(int cid); |
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#endif /* AVCODEC_DNXHDDATA_H */ |