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104 lines
4.0 KiB
104 lines
4.0 KiB
/* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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_IDCTDSP_H |
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#define AVCODEC_IDCTDSP_H |
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#include <stdint.h> |
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#include "avcodec.h" |
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/** |
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* Scantable. |
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*/ |
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typedef struct ScanTable { |
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const uint8_t *scantable; |
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uint8_t permutated[64]; |
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uint8_t raster_end[64]; |
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} ScanTable; |
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void ff_init_scantable(uint8_t *permutation, ScanTable *st, |
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const uint8_t *src_scantable); |
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void ff_init_scantable_permutation(uint8_t *idct_permutation, |
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int idct_permutation_type); |
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int ff_init_scantable_permutation_x86(uint8_t *idct_permutation, |
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int idct_permutation_type); |
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typedef struct IDCTDSPContext { |
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/* pixel ops : interface with DCT */ |
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void (*put_pixels_clamped)(const int16_t *block /* align 16 */, |
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uint8_t *pixels /* align 8 */, |
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int line_size); |
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void (*put_signed_pixels_clamped)(const int16_t *block /* align 16 */, |
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uint8_t *pixels /* align 8 */, |
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int line_size); |
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void (*add_pixels_clamped)(const int16_t *block /* align 16 */, |
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uint8_t *pixels /* align 8 */, |
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int line_size); |
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void (*idct)(int16_t *block /* align 16 */); |
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/** |
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* block -> idct -> clip to unsigned 8 bit -> dest. |
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* (-1392, 0, 0, ...) -> idct -> (-174, -174, ...) -> put -> (0, 0, ...) |
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* @param line_size size in bytes of a horizontal line of dest |
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*/ |
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void (*idct_put)(uint8_t *dest /* align 8 */, |
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int line_size, int16_t *block /* align 16 */); |
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/** |
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* block -> idct -> add dest -> clip to unsigned 8 bit -> dest. |
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* @param line_size size in bytes of a horizontal line of dest |
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*/ |
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void (*idct_add)(uint8_t *dest /* align 8 */, |
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int line_size, int16_t *block /* align 16 */); |
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/** |
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* IDCT input permutation. |
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* Several optimized IDCTs need a permutated input (relative to the |
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* normal order of the reference IDCT). |
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* This permutation must be performed before the idct_put/add. |
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* Note, normally this can be merged with the zigzag/alternate scan<br> |
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* An example to avoid confusion: |
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* - (->decode coeffs -> zigzag reorder -> dequant -> reference IDCT -> ...) |
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* - (x -> reference DCT -> reference IDCT -> x) |
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* - (x -> reference DCT -> simple_mmx_perm = idct_permutation |
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* -> simple_idct_mmx -> x) |
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* - (-> decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant |
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* -> simple_idct_mmx -> ...) |
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*/ |
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uint8_t idct_permutation[64]; |
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int idct_permutation_type; |
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#define FF_NO_IDCT_PERM 1 |
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#define FF_LIBMPEG2_IDCT_PERM 2 |
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#define FF_SIMPLE_IDCT_PERM 3 |
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#define FF_TRANSPOSE_IDCT_PERM 4 |
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#define FF_PARTTRANS_IDCT_PERM 5 |
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#define FF_SSE2_IDCT_PERM 6 |
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} IDCTDSPContext; |
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void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx); |
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void ff_idctdsp_init_arm(IDCTDSPContext *c, AVCodecContext *avctx, |
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unsigned high_bit_depth); |
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void ff_idctdsp_init_ppc(IDCTDSPContext *c, AVCodecContext *avctx, |
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unsigned high_bit_depth); |
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void ff_idctdsp_init_x86(IDCTDSPContext *c, AVCodecContext *avctx, |
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unsigned high_bit_depth); |
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#endif /* AVCODEC_IDCTDSP_H */
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