/* * DSP utils * Copyright (c) 2000, 2001, 2002 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * DSP utils. * Note, many functions in here may use MMX which trashes the FPU state, it is * absolutely necessary to call emms_c() between DSP & float/double code. */ #ifndef AVCODEC_DSPUTIL_H #define AVCODEC_DSPUTIL_H #include "avcodec.h" extern uint32_t ff_square_tab[512]; struct MpegEncContext; /* Motion estimation: * h is limited to { width / 2, width, 2 * width }, * but never larger than 16 and never smaller than 2. * Although currently h < 4 is not used as functions with * width < 8 are neither used nor implemented. */ typedef int (*me_cmp_func)(struct MpegEncContext *c, uint8_t *blk1 /* align width (8 or 16) */, uint8_t *blk2 /* align 1 */, int line_size, int h); /** * Scantable. */ typedef struct ScanTable { const uint8_t *scantable; uint8_t permutated[64]; uint8_t raster_end[64]; } ScanTable; void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable); void ff_init_scantable_permutation(uint8_t *idct_permutation, int idct_permutation_type); /** * DSPContext. */ typedef struct DSPContext { /* pixel ops : interface with DCT */ void (*get_pixels)(int16_t *block /* align 16 */, const uint8_t *pixels /* align 8 */, int line_size); void (*diff_pixels)(int16_t *block /* align 16 */, const uint8_t *s1 /* align 8 */, const uint8_t *s2 /* align 8 */, int stride); void (*put_pixels_clamped)(const int16_t *block /* align 16 */, uint8_t *pixels /* align 8 */, int line_size); void (*put_signed_pixels_clamped)(const int16_t *block /* align 16 */, uint8_t *pixels /* align 8 */, int line_size); void (*add_pixels_clamped)(const int16_t *block /* align 16 */, uint8_t *pixels /* align 8 */, int line_size); int (*sum_abs_dctelem)(int16_t *block /* align 16 */); int (*pix_sum)(uint8_t *pix, int line_size); int (*pix_norm1)(uint8_t *pix, int line_size); me_cmp_func sad[6]; /* identical to pix_absAxA except additional void * */ me_cmp_func sse[6]; me_cmp_func hadamard8_diff[6]; me_cmp_func dct_sad[6]; me_cmp_func quant_psnr[6]; me_cmp_func bit[6]; me_cmp_func rd[6]; me_cmp_func vsad[6]; me_cmp_func vsse[6]; me_cmp_func nsse[6]; me_cmp_func dct_max[6]; me_cmp_func dct264_sad[6]; me_cmp_func me_pre_cmp[6]; me_cmp_func me_cmp[6]; me_cmp_func me_sub_cmp[6]; me_cmp_func mb_cmp[6]; me_cmp_func ildct_cmp[6]; // only width 16 used me_cmp_func frame_skip_cmp[6]; // only width 8 used me_cmp_func pix_abs[2][4]; /* (I)DCT */ void (*fdct)(int16_t *block /* align 16 */); void (*fdct248)(int16_t *block /* align 16 */); /* IDCT really */ 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 */, int 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 */, int 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
* 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]; int idct_permutation_type; #define FF_NO_IDCT_PERM 1 #define FF_LIBMPEG2_IDCT_PERM 2 #define FF_SIMPLE_IDCT_PERM 3 #define FF_TRANSPOSE_IDCT_PERM 4 #define FF_PARTTRANS_IDCT_PERM 5 #define FF_SSE2_IDCT_PERM 6 int (*try_8x8basis)(int16_t rem[64], int16_t weight[64], int16_t basis[64], int scale); void (*add_8x8basis)(int16_t rem[64], int16_t basis[64], int scale); #define BASIS_SHIFT 16 #define RECON_SHIFT 6 void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w, int h, int sides); #define EDGE_WIDTH 16 #define EDGE_TOP 1 #define EDGE_BOTTOM 2 void (*shrink[4])(uint8_t *dst, int dst_wrap, const uint8_t *src, int src_wrap, int width, int height); } DSPContext; void ff_dsputil_static_init(void); void ff_dsputil_init(DSPContext *p, AVCodecContext *avctx); void ff_set_cmp(DSPContext *c, me_cmp_func *cmp, int type); void ff_dsputil_init_arm(DSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth); void ff_dsputil_init_ppc(DSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth); void ff_dsputil_init_x86(DSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth); #endif /* AVCODEC_DSPUTIL_H */