1/* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19#ifndef AVCODEC_IDCTDSP_H 20#define AVCODEC_IDCTDSP_H 21 22#include <stdint.h> 23 24#include "config.h" 25 26#include "avcodec.h" 27 28/** 29 * Scantable. 30 */ 31typedef struct ScanTable { 32 const uint8_t *scantable; 33 uint8_t permutated[64]; 34 uint8_t raster_end[64]; 35} ScanTable; 36 37enum idct_permutation_type { 38 FF_IDCT_PERM_NONE, 39 FF_IDCT_PERM_LIBMPEG2, 40 FF_IDCT_PERM_SIMPLE, 41 FF_IDCT_PERM_TRANSPOSE, 42 FF_IDCT_PERM_PARTTRANS, 43 FF_IDCT_PERM_SSE2, 44}; 45 46void ff_init_scantable(const uint8_t *permutation, ScanTable *st, 47 const uint8_t *src_scantable); 48void ff_init_scantable_permutation(uint8_t *idct_permutation, 49 enum idct_permutation_type perm_type); 50int ff_init_scantable_permutation_x86(uint8_t *idct_permutation, 51 enum idct_permutation_type perm_type); 52 53typedef struct IDCTDSPContext { 54 /* pixel ops : interface with DCT */ 55 void (*put_pixels_clamped)(const int16_t *block /* align 16 */, 56 uint8_t *av_restrict pixels /* align 8 */, 57 ptrdiff_t line_size); 58 void (*put_signed_pixels_clamped)(const int16_t *block /* align 16 */, 59 uint8_t *av_restrict pixels /* align 8 */, 60 ptrdiff_t line_size); 61 void (*add_pixels_clamped)(const int16_t *block /* align 16 */, 62 uint8_t *av_restrict pixels /* align 8 */, 63 ptrdiff_t line_size); 64 65 void (*idct)(int16_t *block /* align 16 */); 66 67 /** 68 * block -> idct -> clip to unsigned 8 bit -> dest. 69 * (-1392, 0, 0, ...) -> idct -> (-174, -174, ...) -> put -> (0, 0, ...) 70 * @param line_size size in bytes of a horizontal line of dest 71 */ 72 void (*idct_put)(uint8_t *dest /* align 8 */, 73 ptrdiff_t line_size, int16_t *block /* align 16 */); 74 75 /** 76 * block -> idct -> add dest -> clip to unsigned 8 bit -> dest. 77 * @param line_size size in bytes of a horizontal line of dest 78 */ 79 void (*idct_add)(uint8_t *dest /* align 8 */, 80 ptrdiff_t line_size, int16_t *block /* align 16 */); 81 82 /** 83 * IDCT input permutation. 84 * Several optimized IDCTs need a permutated input (relative to the 85 * normal order of the reference IDCT). 86 * This permutation must be performed before the idct_put/add. 87 * Note, normally this can be merged with the zigzag/alternate scan<br> 88 * An example to avoid confusion: 89 * - (->decode coeffs -> zigzag reorder -> dequant -> reference IDCT -> ...) 90 * - (x -> reference DCT -> reference IDCT -> x) 91 * - (x -> reference DCT -> simple_mmx_perm = idct_permutation 92 * -> simple_idct_mmx -> x) 93 * - (-> decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant 94 * -> simple_idct_mmx -> ...) 95 */ 96 uint8_t idct_permutation[64]; 97 enum idct_permutation_type perm_type; 98 99 int mpeg4_studio_profile; 100} IDCTDSPContext; 101 102void ff_put_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, 103 ptrdiff_t line_size); 104void ff_add_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, 105 ptrdiff_t line_size); 106 107void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx); 108 109void ff_idctdsp_init_aarch64(IDCTDSPContext *c, AVCodecContext *avctx, 110 unsigned high_bit_depth); 111void ff_idctdsp_init_alpha(IDCTDSPContext *c, AVCodecContext *avctx, 112 unsigned high_bit_depth); 113void ff_idctdsp_init_arm(IDCTDSPContext *c, AVCodecContext *avctx, 114 unsigned high_bit_depth); 115void ff_idctdsp_init_ppc(IDCTDSPContext *c, AVCodecContext *avctx, 116 unsigned high_bit_depth); 117void ff_idctdsp_init_x86(IDCTDSPContext *c, AVCodecContext *avctx, 118 unsigned high_bit_depth); 119void ff_idctdsp_init_mips(IDCTDSPContext *c, AVCodecContext *avctx, 120 unsigned high_bit_depth); 121void ff_idctdsp_init_loongarch(IDCTDSPContext *c, AVCodecContext *avctx, 122 unsigned high_bit_depth); 123 124#endif /* AVCODEC_IDCTDSP_H */ 125