/* * 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_IDCTDSP_H #define AVCODEC_IDCTDSP_H #include <stdint.h> #include "config.h" #include "avcodec.h" /** * Scantable. */ typedef struct ScanTable { const uint8_t *scantable; uint8_t permutated[64]; uint8_t raster_end[64]; } ScanTable; enum idct_permutation_type { FF_IDCT_PERM_NONE, FF_IDCT_PERM_LIBMPEG2, FF_IDCT_PERM_SIMPLE, FF_IDCT_PERM_TRANSPOSE, FF_IDCT_PERM_PARTTRANS, FF_IDCT_PERM_SSE2, }; void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable); void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type); int ff_init_scantable_permutation_x86(uint8_t *idct_permutation, enum idct_permutation_type perm_type); typedef struct IDCTDSPContext { /* pixel ops : interface with DCT */ void (*put_pixels_clamped)(const int16_t *block /* align 16 */, uint8_t *av_restrict pixels /* align 8 */, ptrdiff_t line_size); void (*put_signed_pixels_clamped)(const int16_t *block /* align 16 */, uint8_t *av_restrict pixels /* align 8 */, ptrdiff_t line_size); void (*add_pixels_clamped)(const int16_t *block /* align 16 */, uint8_t *av_restrict pixels /* align 8 */, ptrdiff_t line_size); void (*idct)(int16_t *block /* align 16 */); /** * block -> idct -> clip to unsigned 8 bit -> dest. * (-1392, 0, 0, ...) -> idct -> (-174, -174, ...) -> put -> (0, 0, ...) * @param line_size size in bytes of a horizontal line of dest */ void (*idct_put)(uint8_t *dest /* align 8 */, ptrdiff_t line_size, int16_t *block /* align 16 */); /** * block -> idct -> add dest -> clip to unsigned 8 bit -> dest. * @param line_size size in bytes of a horizontal line of dest */ void (*idct_add)(uint8_t *dest /* align 8 */, ptrdiff_t line_size, int16_t *block /* align 16 */); /** * IDCT input permutation. * Several optimized IDCTs need a permutated input (relative to the * normal order of the reference IDCT). * This permutation must be performed before the idct_put/add. * Note, normally this can be merged with the zigzag/alternate scan<br> * An example to avoid confusion: * - (->decode coeffs -> zigzag reorder -> dequant -> reference IDCT -> ...) * - (x -> reference DCT -> reference IDCT -> x) * - (x -> reference DCT -> simple_mmx_perm = idct_permutation * -> simple_idct_mmx -> x) * - (-> decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant * -> simple_idct_mmx -> ...) */ uint8_t idct_permutation[64]; enum idct_permutation_type perm_type; } IDCTDSPContext; void ff_put_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t line_size); void ff_add_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels, ptrdiff_t line_size); void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx); void ff_idctdsp_init_aarch64(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth); void ff_idctdsp_init_alpha(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth); void ff_idctdsp_init_arm(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth); void ff_idctdsp_init_ppc(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth); void ff_idctdsp_init_x86(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth); void ff_idctdsp_init_mips(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth); #endif /* AVCODEC_IDCTDSP_H */