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/* |
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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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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_DNXHDDATA_H |
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#define AVCODEC_DNXHDDATA_H |
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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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/** Additional profile info flags */ |
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#define DNXHD_INTERLACED (1<<0) |
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#define DNXHD_MBAFF (1<<1) |
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#define DNXHD_444 (1<<2) |
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/** Frame headers, extra 0x00 added to end for parser */ |
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#define DNXHD_HEADER_INITIAL 0x000002800100 |
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#define DNXHD_HEADER_444 0x000002800200 |
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/** Indicate that a CIDEntry value must be read in the bitstream */ |
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#define DNXHD_VARIABLE 0 |
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typedef struct CIDEntry { |
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int cid; |
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unsigned int width, height; |
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unsigned int frame_size; |
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unsigned int coding_unit_size; |
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uint16_t flags; |
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int index_bits; |
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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; |
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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; |
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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) |
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{ |
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uint64_t data_offset = prefix >> 16; |
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✓✓✓✓
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if ((prefix & 0xFFFF0000FFFFLL) == 0x0300 && |
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✓✗ |
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data_offset >= 0x0280 && data_offset <= 0x2170 && |
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✓✗ |
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(data_offset & 3) == 0) |
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return prefix; |
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return 0; |
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} |
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static av_always_inline uint64_t ff_dnxhd_check_header_prefix(uint64_t prefix) |
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{ |
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✓✓✓✓
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if (prefix == DNXHD_HEADER_INITIAL || |
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✓✓ |
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prefix == DNXHD_HEADER_444 || |
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ff_dnxhd_check_header_prefix_hr(prefix)) |
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return prefix; |
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return 0; |
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} |
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static av_always_inline uint64_t ff_dnxhd_parse_header_prefix(const uint8_t *buf) |
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{ |
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uint64_t prefix = AV_RB32(buf); |
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prefix = (prefix << 16) | buf[4] << 8; |
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return ff_dnxhd_check_header_prefix(prefix); |
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} |
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int avpriv_dnxhd_get_frame_size(int cid); |
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int avpriv_dnxhd_get_hr_frame_size(int cid, int w, int h); |
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int avpriv_dnxhd_get_interlaced(int cid); |
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#endif /* AVCODEC_DNXHDDATA_H */ |