686 lines
23 KiB
C
Executable File
686 lines
23 KiB
C
Executable File
/*
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* NewTek SpeedHQ codec
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* Copyright 2017 Steinar H. Gunderson
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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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/**
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* @file
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* NewTek SpeedHQ decoder.
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*/
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#define BITSTREAM_READER_LE
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#include "libavutil/attributes.h"
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#include "avcodec.h"
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#include "get_bits.h"
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#include "internal.h"
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#include "libavutil/thread.h"
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#include "mathops.h"
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#include "mpeg12.h"
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#include "mpeg12data.h"
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#include "mpeg12vlc.h"
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#define MAX_INDEX (64 - 1)
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/*
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* 5 bits makes for very small tables, with no more than two lookups needed
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* for the longest (10-bit) codes.
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*/
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#define ALPHA_VLC_BITS 5
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typedef struct SHQContext {
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AVCodecContext *avctx;
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BlockDSPContext bdsp;
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IDCTDSPContext idsp;
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ScanTable intra_scantable;
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int quant_matrix[64];
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enum { SHQ_SUBSAMPLING_420, SHQ_SUBSAMPLING_422, SHQ_SUBSAMPLING_444 }
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subsampling;
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enum { SHQ_NO_ALPHA, SHQ_RLE_ALPHA, SHQ_DCT_ALPHA } alpha_type;
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} SHQContext;
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/* AC codes: Very similar but not identical to MPEG-2. */
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static const uint16_t speedhq_vlc[123][2] = {
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{0x0001, 2}, {0x0003, 3}, {0x000E, 4}, {0x0007, 5},
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{0x0017, 5}, {0x0028, 6}, {0x0008, 6}, {0x006F, 7},
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{0x001F, 7}, {0x00C4, 8}, {0x0044, 8}, {0x005F, 8},
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{0x00DF, 8}, {0x007F, 8}, {0x00FF, 8}, {0x3E00, 14},
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{0x1E00, 14}, {0x2E00, 14}, {0x0E00, 14}, {0x3600, 14},
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{0x1600, 14}, {0x2600, 14}, {0x0600, 14}, {0x3A00, 14},
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{0x1A00, 14}, {0x2A00, 14}, {0x0A00, 14}, {0x3200, 14},
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{0x1200, 14}, {0x2200, 14}, {0x0200, 14}, {0x0C00, 15},
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{0x7400, 15}, {0x3400, 15}, {0x5400, 15}, {0x1400, 15},
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{0x6400, 15}, {0x2400, 15}, {0x4400, 15}, {0x0400, 15},
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{0x0002, 3}, {0x000C, 5}, {0x004F, 7}, {0x00E4, 8},
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{0x0004, 8}, {0x0D00, 13}, {0x1500, 13}, {0x7C00, 15},
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{0x3C00, 15}, {0x5C00, 15}, {0x1C00, 15}, {0x6C00, 15},
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{0x2C00, 15}, {0x4C00, 15}, {0xC800, 16}, {0x4800, 16},
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{0x8800, 16}, {0x0800, 16}, {0x0300, 13}, {0x1D00, 13},
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{0x0014, 5}, {0x0070, 7}, {0x003F, 8}, {0x00C0, 10},
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{0x0500, 13}, {0x0180, 12}, {0x0280, 12}, {0x0C80, 12},
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{0x0080, 12}, {0x0B00, 13}, {0x1300, 13}, {0x001C, 5},
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{0x0064, 8}, {0x0380, 12}, {0x1900, 13}, {0x0D80, 12},
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{0x0018, 6}, {0x00BF, 8}, {0x0480, 12}, {0x0B80, 12},
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{0x0038, 6}, {0x0040, 9}, {0x0900, 13}, {0x0030, 7},
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{0x0780, 12}, {0x2800, 16}, {0x0010, 7}, {0x0A80, 12},
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{0x0050, 7}, {0x0880, 12}, {0x000F, 7}, {0x1100, 13},
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{0x002F, 7}, {0x0100, 13}, {0x0084, 8}, {0x5800, 16},
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{0x00A4, 8}, {0x9800, 16}, {0x0024, 8}, {0x1800, 16},
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{0x0140, 9}, {0xE800, 16}, {0x01C0, 9}, {0x6800, 16},
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{0x02C0, 10}, {0xA800, 16}, {0x0F80, 12}, {0x0580, 12},
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{0x0980, 12}, {0x0E80, 12}, {0x0680, 12}, {0x1F00, 13},
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{0x0F00, 13}, {0x1700, 13}, {0x0700, 13}, {0x1B00, 13},
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{0xF800, 16}, {0x7800, 16}, {0xB800, 16}, {0x3800, 16},
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{0xD800, 16},
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{0x0020, 6}, /* escape */
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{0x0006, 4} /* EOB */
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};
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static const uint8_t speedhq_level[121] = {
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1, 2, 3, 4, 5, 6, 7, 8,
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9, 10, 11, 12, 13, 14, 15, 16,
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17, 18, 19, 20, 21, 22, 23, 24,
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25, 26, 27, 28, 29, 30, 31, 32,
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33, 34, 35, 36, 37, 38, 39, 40,
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1, 2, 3, 4, 5, 6, 7, 8,
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9, 10, 11, 12, 13, 14, 15, 16,
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17, 18, 19, 20, 1, 2, 3, 4,
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5, 6, 7, 8, 9, 10, 11, 1,
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2, 3, 4, 5, 1, 2, 3, 4,
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1, 2, 3, 1, 2, 3, 1, 2,
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1, 2, 1, 2, 1, 2, 1, 2,
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1, 2, 1, 2, 1, 2, 1, 2,
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1, 2, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1,
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1,
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};
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static const uint8_t speedhq_run[121] = {
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 3,
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3, 3, 3, 3, 4, 4, 4, 4,
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5, 5, 5, 6, 6, 6, 7, 7,
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8, 8, 9, 9, 10, 10, 11, 11,
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12, 12, 13, 13, 14, 14, 15, 15,
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16, 16, 17, 18, 19, 20, 21, 22,
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23, 24, 25, 26, 27, 28, 29, 30,
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31,
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};
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static RLTable ff_rl_speedhq = {
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121,
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121,
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(const uint16_t (*)[])speedhq_vlc,
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speedhq_run,
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speedhq_level,
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};
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/* NOTE: The first element is always 16, unscaled. */
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static const uint8_t unscaled_quant_matrix[64] = {
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16, 16, 19, 22, 26, 27, 29, 34,
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16, 16, 22, 24, 27, 29, 34, 37,
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19, 22, 26, 27, 29, 34, 34, 38,
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22, 22, 26, 27, 29, 34, 37, 40,
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22, 26, 27, 29, 32, 35, 40, 48,
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26, 27, 29, 32, 35, 40, 48, 58,
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26, 27, 29, 34, 38, 46, 56, 69,
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27, 29, 35, 38, 46, 56, 69, 83
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};
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static uint8_t ff_speedhq_static_rl_table_store[2][2*MAX_RUN + MAX_LEVEL + 3];
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static VLC ff_dc_lum_vlc_le;
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static VLC ff_dc_chroma_vlc_le;
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static VLC ff_dc_alpha_run_vlc_le;
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static VLC ff_dc_alpha_level_vlc_le;
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static inline int decode_dc_le(GetBitContext *gb, int component)
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{
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int code, diff;
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if (component == 0 || component == 3) {
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code = get_vlc2(gb, ff_dc_lum_vlc_le.table, DC_VLC_BITS, 2);
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} else {
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code = get_vlc2(gb, ff_dc_chroma_vlc_le.table, DC_VLC_BITS, 2);
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}
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if (code < 0) {
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av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n");
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return 0xffff;
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}
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if (!code) {
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diff = 0;
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} else {
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diff = get_xbits_le(gb, code);
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}
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return diff;
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}
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static inline int decode_alpha_block(const SHQContext *s, GetBitContext *gb, uint8_t last_alpha[16], uint8_t *dest, int linesize)
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{
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uint8_t block[128];
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int i = 0, x, y;
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memset(block, 0, sizeof(block));
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{
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OPEN_READER(re, gb);
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for ( ;; ) {
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int run, level;
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UPDATE_CACHE_LE(re, gb);
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GET_VLC(run, re, gb, ff_dc_alpha_run_vlc_le.table, ALPHA_VLC_BITS, 2);
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if (run < 0) break;
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i += run;
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if (i >= 128)
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return AVERROR_INVALIDDATA;
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UPDATE_CACHE_LE(re, gb);
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GET_VLC(level, re, gb, ff_dc_alpha_level_vlc_le.table, ALPHA_VLC_BITS, 2);
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block[i++] = level;
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}
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CLOSE_READER(re, gb);
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}
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for (y = 0; y < 8; y++) {
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for (x = 0; x < 16; x++) {
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last_alpha[x] -= block[y * 16 + x];
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}
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memcpy(dest, last_alpha, 16);
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dest += linesize;
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}
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return 0;
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}
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static inline int decode_dct_block(const SHQContext *s, GetBitContext *gb, int last_dc[4], int component, uint8_t *dest, int linesize)
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{
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const int *quant_matrix = s->quant_matrix;
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const uint8_t *scantable = s->intra_scantable.permutated;
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LOCAL_ALIGNED_32(int16_t, block, [64]);
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int dc_offset;
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s->bdsp.clear_block(block);
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dc_offset = decode_dc_le(gb, component);
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last_dc[component] -= dc_offset; /* Note: Opposite of most codecs. */
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block[scantable[0]] = last_dc[component]; /* quant_matrix[0] is always 16. */
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/* Read AC coefficients. */
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{
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int i = 0;
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OPEN_READER(re, gb);
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for ( ;; ) {
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int level, run;
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UPDATE_CACHE_LE(re, gb);
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GET_RL_VLC(level, run, re, gb, ff_rl_speedhq.rl_vlc[0],
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TEX_VLC_BITS, 2, 0);
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if (level == 127) {
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break;
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} else if (level) {
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i += run;
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if (i > MAX_INDEX)
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return AVERROR_INVALIDDATA;
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/* If next bit is 1, level = -level */
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level = (level ^ SHOW_SBITS(re, gb, 1)) -
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SHOW_SBITS(re, gb, 1);
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LAST_SKIP_BITS(re, gb, 1);
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} else {
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/* Escape. */
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#if MIN_CACHE_BITS < 6 + 6 + 12
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#error MIN_CACHE_BITS is too small for the escape code, add UPDATE_CACHE
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#endif
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run = SHOW_UBITS(re, gb, 6) + 1;
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SKIP_BITS(re, gb, 6);
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level = SHOW_UBITS(re, gb, 12) - 2048;
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LAST_SKIP_BITS(re, gb, 12);
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i += run;
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if (i > MAX_INDEX)
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return AVERROR_INVALIDDATA;
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}
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block[scantable[i]] = (level * quant_matrix[i]) >> 4;
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}
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CLOSE_READER(re, gb);
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}
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s->idsp.idct_put(dest, linesize, block);
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return 0;
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}
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static int decode_speedhq_field(const SHQContext *s, const uint8_t *buf, int buf_size, AVFrame *frame, int field_number, int start, int end, int line_stride)
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{
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int ret, slice_number, slice_offsets[5];
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int linesize_y = frame->linesize[0] * line_stride;
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int linesize_cb = frame->linesize[1] * line_stride;
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int linesize_cr = frame->linesize[2] * line_stride;
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int linesize_a;
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if (s->alpha_type != SHQ_NO_ALPHA)
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linesize_a = frame->linesize[3] * line_stride;
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if (end < start || end - start < 3 || end > buf_size)
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return AVERROR_INVALIDDATA;
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slice_offsets[0] = start;
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slice_offsets[4] = end;
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for (slice_number = 1; slice_number < 4; slice_number++) {
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uint32_t last_offset, slice_len;
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last_offset = slice_offsets[slice_number - 1];
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slice_len = AV_RL24(buf + last_offset);
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slice_offsets[slice_number] = last_offset + slice_len;
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if (slice_len < 3 || slice_offsets[slice_number] > end - 3)
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return AVERROR_INVALIDDATA;
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}
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for (slice_number = 0; slice_number < 4; slice_number++) {
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GetBitContext gb;
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uint32_t slice_begin, slice_end;
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int x, y;
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slice_begin = slice_offsets[slice_number];
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slice_end = slice_offsets[slice_number + 1];
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if ((ret = init_get_bits8(&gb, buf + slice_begin + 3, slice_end - slice_begin - 3)) < 0)
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return ret;
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for (y = slice_number * 16 * line_stride; y < frame->height; y += line_stride * 64) {
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uint8_t *dest_y, *dest_cb, *dest_cr, *dest_a;
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int last_dc[4] = { 1024, 1024, 1024, 1024 };
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uint8_t last_alpha[16];
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memset(last_alpha, 255, sizeof(last_alpha));
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dest_y = frame->data[0] + frame->linesize[0] * (y + field_number);
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if (s->subsampling == SHQ_SUBSAMPLING_420) {
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dest_cb = frame->data[1] + frame->linesize[1] * (y/2 + field_number);
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dest_cr = frame->data[2] + frame->linesize[2] * (y/2 + field_number);
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} else {
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dest_cb = frame->data[1] + frame->linesize[1] * (y + field_number);
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dest_cr = frame->data[2] + frame->linesize[2] * (y + field_number);
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}
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if (s->alpha_type != SHQ_NO_ALPHA) {
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dest_a = frame->data[3] + frame->linesize[3] * (y + field_number);
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}
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for (x = 0; x < frame->width; x += 16) {
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/* Decode the four luma blocks. */
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if ((ret = decode_dct_block(s, &gb, last_dc, 0, dest_y, linesize_y)) < 0)
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return ret;
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if ((ret = decode_dct_block(s, &gb, last_dc, 0, dest_y + 8, linesize_y)) < 0)
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return ret;
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if ((ret = decode_dct_block(s, &gb, last_dc, 0, dest_y + 8 * linesize_y, linesize_y)) < 0)
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return ret;
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if ((ret = decode_dct_block(s, &gb, last_dc, 0, dest_y + 8 * linesize_y + 8, linesize_y)) < 0)
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return ret;
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/*
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* Decode the first chroma block. For 4:2:0, this is the only one;
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* for 4:2:2, it's the top block; for 4:4:4, it's the top-left block.
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*/
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if ((ret = decode_dct_block(s, &gb, last_dc, 1, dest_cb, linesize_cb)) < 0)
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return ret;
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if ((ret = decode_dct_block(s, &gb, last_dc, 2, dest_cr, linesize_cr)) < 0)
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return ret;
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if (s->subsampling != SHQ_SUBSAMPLING_420) {
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/* For 4:2:2, this is the bottom block; for 4:4:4, it's the bottom-left block. */
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if ((ret = decode_dct_block(s, &gb, last_dc, 1, dest_cb + 8 * linesize_cb, linesize_cb)) < 0)
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return ret;
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if ((ret = decode_dct_block(s, &gb, last_dc, 2, dest_cr + 8 * linesize_cr, linesize_cr)) < 0)
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return ret;
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if (s->subsampling == SHQ_SUBSAMPLING_444) {
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/* Top-right and bottom-right blocks. */
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if ((ret = decode_dct_block(s, &gb, last_dc, 1, dest_cb + 8, linesize_cb)) < 0)
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return ret;
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if ((ret = decode_dct_block(s, &gb, last_dc, 2, dest_cr + 8, linesize_cr)) < 0)
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return ret;
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if ((ret = decode_dct_block(s, &gb, last_dc, 1, dest_cb + 8 * linesize_cb + 8, linesize_cb)) < 0)
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return ret;
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if ((ret = decode_dct_block(s, &gb, last_dc, 2, dest_cr + 8 * linesize_cr + 8, linesize_cr)) < 0)
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return ret;
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dest_cb += 8;
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dest_cr += 8;
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}
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}
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dest_y += 16;
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dest_cb += 8;
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dest_cr += 8;
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if (s->alpha_type == SHQ_RLE_ALPHA) {
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/* Alpha coded using 16x8 RLE blocks. */
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if ((ret = decode_alpha_block(s, &gb, last_alpha, dest_a, linesize_a)) < 0)
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return ret;
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if ((ret = decode_alpha_block(s, &gb, last_alpha, dest_a + 8 * linesize_a, linesize_a)) < 0)
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return ret;
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dest_a += 16;
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} else if (s->alpha_type == SHQ_DCT_ALPHA) {
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/* Alpha encoded exactly like luma. */
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if ((ret = decode_dct_block(s, &gb, last_dc, 3, dest_a, linesize_a)) < 0)
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return ret;
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if ((ret = decode_dct_block(s, &gb, last_dc, 3, dest_a + 8, linesize_a)) < 0)
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return ret;
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if ((ret = decode_dct_block(s, &gb, last_dc, 3, dest_a + 8 * linesize_a, linesize_a)) < 0)
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return ret;
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if ((ret = decode_dct_block(s, &gb, last_dc, 3, dest_a + 8 * linesize_a + 8, linesize_a)) < 0)
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return ret;
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dest_a += 16;
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}
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}
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}
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}
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|
return 0;
|
|
}
|
|
|
|
static void compute_quant_matrix(int *output, int qscale)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 64; i++) output[i] = unscaled_quant_matrix[ff_zigzag_direct[i]] * qscale;
|
|
}
|
|
|
|
static int speedhq_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *got_frame,
|
|
AVPacket *avpkt)
|
|
{
|
|
SHQContext * const s = avctx->priv_data;
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
AVFrame *frame = data;
|
|
uint8_t quality;
|
|
uint32_t second_field_offset;
|
|
int ret;
|
|
|
|
if (buf_size < 4)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
quality = buf[0];
|
|
if (quality >= 100) {
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
compute_quant_matrix(s->quant_matrix, 100 - quality);
|
|
|
|
second_field_offset = AV_RL24(buf + 1);
|
|
if (second_field_offset >= buf_size - 3) {
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
avctx->coded_width = FFALIGN(avctx->width, 16);
|
|
avctx->coded_height = FFALIGN(avctx->height, 16);
|
|
|
|
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
|
|
return ret;
|
|
}
|
|
frame->key_frame = 1;
|
|
|
|
if (second_field_offset == 4 || second_field_offset == (buf_size-4)) {
|
|
/*
|
|
* Overlapping first and second fields is used to signal
|
|
* encoding only a single field. In this case, "height"
|
|
* is ambiguous; it could mean either the height of the
|
|
* frame as a whole, or of the field. The former would make
|
|
* more sense for compatibility with legacy decoders,
|
|
* but this matches the convention used in NDI, which is
|
|
* the primary user of this trick.
|
|
*/
|
|
if ((ret = decode_speedhq_field(s, buf, buf_size, frame, 0, 4, buf_size, 1)) < 0)
|
|
return ret;
|
|
} else {
|
|
if ((ret = decode_speedhq_field(s, buf, buf_size, frame, 0, 4, second_field_offset, 2)) < 0)
|
|
return ret;
|
|
if ((ret = decode_speedhq_field(s, buf, buf_size, frame, 1, second_field_offset, buf_size, 2)) < 0)
|
|
return ret;
|
|
}
|
|
|
|
*got_frame = 1;
|
|
return buf_size;
|
|
}
|
|
|
|
/*
|
|
* Alpha VLC. Run and level are independently coded, and would be
|
|
* outside the default limits for MAX_RUN/MAX_LEVEL, so we don't
|
|
* bother with combining them into one table.
|
|
*/
|
|
static av_cold void compute_alpha_vlcs(void)
|
|
{
|
|
uint16_t run_code[134], level_code[266];
|
|
uint8_t run_bits[134], level_bits[266];
|
|
int16_t run_symbols[134], level_symbols[266];
|
|
int entry, i, sign;
|
|
|
|
/* Initialize VLC for alpha run. */
|
|
entry = 0;
|
|
|
|
/* 0 -> 0. */
|
|
run_code[entry] = 0;
|
|
run_bits[entry] = 1;
|
|
run_symbols[entry] = 0;
|
|
++entry;
|
|
|
|
/* 10xx -> xx plus 1. */
|
|
for (i = 0; i < 4; ++i) {
|
|
run_code[entry] = (i << 2) | 1;
|
|
run_bits[entry] = 4;
|
|
run_symbols[entry] = i + 1;
|
|
++entry;
|
|
}
|
|
|
|
/* 111xxxxxxx -> xxxxxxx. */
|
|
for (i = 0; i < 128; ++i) {
|
|
run_code[entry] = (i << 3) | 7;
|
|
run_bits[entry] = 10;
|
|
run_symbols[entry] = i;
|
|
++entry;
|
|
}
|
|
|
|
/* 110 -> EOB. */
|
|
run_code[entry] = 3;
|
|
run_bits[entry] = 3;
|
|
run_symbols[entry] = -1;
|
|
++entry;
|
|
|
|
av_assert0(entry == FF_ARRAY_ELEMS(run_code));
|
|
|
|
INIT_LE_VLC_SPARSE_STATIC(&ff_dc_alpha_run_vlc_le, ALPHA_VLC_BITS,
|
|
FF_ARRAY_ELEMS(run_code),
|
|
run_bits, 1, 1,
|
|
run_code, 2, 2,
|
|
run_symbols, 2, 2, 160);
|
|
|
|
/* Initialize VLC for alpha level. */
|
|
entry = 0;
|
|
|
|
for (sign = 0; sign <= 1; ++sign) {
|
|
/* 1s -> -1 or +1 (depending on sign bit). */
|
|
level_code[entry] = (sign << 1) | 1;
|
|
level_bits[entry] = 2;
|
|
level_symbols[entry] = sign ? -1 : 1;
|
|
++entry;
|
|
|
|
/* 01sxx -> xx plus 2 (2..5 or -2..-5, depending on sign bit). */
|
|
for (i = 0; i < 4; ++i) {
|
|
level_code[entry] = (i << 3) | (sign << 2) | 2;
|
|
level_bits[entry] = 5;
|
|
level_symbols[entry] = sign ? -(i + 2) : (i + 2);
|
|
++entry;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 00xxxxxxxx -> xxxxxxxx, in two's complement. There are many codes
|
|
* here that would better be encoded in other ways (e.g. 0 would be
|
|
* encoded by increasing run, and +/- 1 would be encoded with a
|
|
* shorter code), but it doesn't hurt to allow everything.
|
|
*/
|
|
for (i = 0; i < 256; ++i) {
|
|
level_code[entry] = i << 2;
|
|
level_bits[entry] = 10;
|
|
level_symbols[entry] = i;
|
|
++entry;
|
|
}
|
|
|
|
av_assert0(entry == FF_ARRAY_ELEMS(level_code));
|
|
|
|
INIT_LE_VLC_SPARSE_STATIC(&ff_dc_alpha_level_vlc_le, ALPHA_VLC_BITS,
|
|
FF_ARRAY_ELEMS(level_code),
|
|
level_bits, 1, 1,
|
|
level_code, 2, 2,
|
|
level_symbols, 2, 2, 288);
|
|
}
|
|
|
|
static uint32_t reverse(uint32_t num, int bits)
|
|
{
|
|
return bitswap_32(num) >> (32 - bits);
|
|
}
|
|
|
|
static void reverse_code(const uint16_t *code, const uint8_t *bits,
|
|
uint16_t *reversed_code, int num_entries)
|
|
{
|
|
int i;
|
|
for (i = 0; i < num_entries; i++) {
|
|
reversed_code[i] = reverse(code[i], bits[i]);
|
|
}
|
|
}
|
|
|
|
static av_cold void speedhq_static_init(void)
|
|
{
|
|
uint16_t ff_mpeg12_vlc_dc_lum_code_reversed[12];
|
|
uint16_t ff_mpeg12_vlc_dc_chroma_code_reversed[12];
|
|
|
|
/* Exactly the same as MPEG-2, except little-endian. */
|
|
reverse_code(ff_mpeg12_vlc_dc_lum_code,
|
|
ff_mpeg12_vlc_dc_lum_bits,
|
|
ff_mpeg12_vlc_dc_lum_code_reversed,
|
|
12);
|
|
INIT_LE_VLC_STATIC(&ff_dc_lum_vlc_le, DC_VLC_BITS, 12,
|
|
ff_mpeg12_vlc_dc_lum_bits, 1, 1,
|
|
ff_mpeg12_vlc_dc_lum_code_reversed, 2, 2, 512);
|
|
reverse_code(ff_mpeg12_vlc_dc_chroma_code,
|
|
ff_mpeg12_vlc_dc_chroma_bits,
|
|
ff_mpeg12_vlc_dc_chroma_code_reversed,
|
|
12);
|
|
INIT_LE_VLC_STATIC(&ff_dc_chroma_vlc_le, DC_VLC_BITS, 12,
|
|
ff_mpeg12_vlc_dc_chroma_bits, 1, 1,
|
|
ff_mpeg12_vlc_dc_chroma_code_reversed, 2, 2, 514);
|
|
|
|
ff_rl_init(&ff_rl_speedhq, ff_speedhq_static_rl_table_store);
|
|
INIT_2D_VLC_RL(ff_rl_speedhq, 674, INIT_VLC_LE);
|
|
|
|
compute_alpha_vlcs();
|
|
}
|
|
|
|
static av_cold int speedhq_decode_init(AVCodecContext *avctx)
|
|
{
|
|
int ret;
|
|
static AVOnce init_once = AV_ONCE_INIT;
|
|
SHQContext * const s = avctx->priv_data;
|
|
|
|
s->avctx = avctx;
|
|
|
|
ret = ff_thread_once(&init_once, speedhq_static_init);
|
|
if (ret)
|
|
return AVERROR_UNKNOWN;
|
|
|
|
ff_blockdsp_init(&s->bdsp, avctx);
|
|
ff_idctdsp_init(&s->idsp, avctx);
|
|
ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
|
|
|
|
switch (avctx->codec_tag) {
|
|
case MKTAG('S', 'H', 'Q', '0'):
|
|
s->subsampling = SHQ_SUBSAMPLING_420;
|
|
s->alpha_type = SHQ_NO_ALPHA;
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
|
|
break;
|
|
case MKTAG('S', 'H', 'Q', '1'):
|
|
s->subsampling = SHQ_SUBSAMPLING_420;
|
|
s->alpha_type = SHQ_RLE_ALPHA;
|
|
avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
|
|
break;
|
|
case MKTAG('S', 'H', 'Q', '2'):
|
|
s->subsampling = SHQ_SUBSAMPLING_422;
|
|
s->alpha_type = SHQ_NO_ALPHA;
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
|
|
break;
|
|
case MKTAG('S', 'H', 'Q', '3'):
|
|
s->subsampling = SHQ_SUBSAMPLING_422;
|
|
s->alpha_type = SHQ_RLE_ALPHA;
|
|
avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
|
|
break;
|
|
case MKTAG('S', 'H', 'Q', '4'):
|
|
s->subsampling = SHQ_SUBSAMPLING_444;
|
|
s->alpha_type = SHQ_NO_ALPHA;
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
|
|
break;
|
|
case MKTAG('S', 'H', 'Q', '5'):
|
|
s->subsampling = SHQ_SUBSAMPLING_444;
|
|
s->alpha_type = SHQ_RLE_ALPHA;
|
|
avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
|
|
break;
|
|
case MKTAG('S', 'H', 'Q', '7'):
|
|
s->subsampling = SHQ_SUBSAMPLING_422;
|
|
s->alpha_type = SHQ_DCT_ALPHA;
|
|
avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
|
|
break;
|
|
case MKTAG('S', 'H', 'Q', '9'):
|
|
s->subsampling = SHQ_SUBSAMPLING_444;
|
|
s->alpha_type = SHQ_DCT_ALPHA;
|
|
avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Unknown NewTek SpeedHQ FOURCC provided (%08X)\n",
|
|
avctx->codec_tag);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* This matches what NDI's RGB -> Y'CbCr 4:2:2 converter uses. */
|
|
avctx->colorspace = AVCOL_SPC_BT470BG;
|
|
avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_speedhq_decoder = {
|
|
.name = "speedhq",
|
|
.long_name = NULL_IF_CONFIG_SMALL("NewTek SpeedHQ"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_SPEEDHQ,
|
|
.priv_data_size = sizeof(SHQContext),
|
|
.init = speedhq_decode_init,
|
|
.decode = speedhq_decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
};
|