diff options
Diffstat (limited to 'media/ffvpx/libavcodec/idctdsp.h')
| -rw-r--r-- | media/ffvpx/libavcodec/idctdsp.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/idctdsp.h b/media/ffvpx/libavcodec/idctdsp.h new file mode 100644 index 0000000000..7224463349 --- /dev/null +++ b/media/ffvpx/libavcodec/idctdsp.h @@ -0,0 +1,117 @@ +/* + * 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" + +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_permute_scantable(uint8_t dst[64], const uint8_t src[64], + const uint8_t permutation[64]); +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; + + int mpeg4_studio_profile; +} 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_riscv(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); +void ff_idctdsp_init_loongarch(IDCTDSPContext *c, AVCodecContext *avctx, + unsigned high_bit_depth); + +#endif /* AVCODEC_IDCTDSP_H */ |