mirror of https://git.ffmpeg.org/ffmpeg.git
206 lines
7.4 KiB
C
206 lines
7.4 KiB
C
/*
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* DSP utils
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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/**
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* @file
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* DSP utils.
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* Note, many functions in here may use MMX which trashes the FPU state, it is
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* absolutely necessary to call emms_c() between DSP & float/double code.
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*/
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#ifndef AVCODEC_DSPUTIL_H
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#define AVCODEC_DSPUTIL_H
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#include "avcodec.h"
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extern uint32_t ff_square_tab[512];
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/* minimum alignment rules ;)
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* If you notice errors in the align stuff, need more alignment for some ASM code
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* for some CPU or need to use a function with less aligned data then send a mail
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* to the ffmpeg-devel mailing list, ...
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*
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* !warning These alignments might not match reality, (missing attribute((align))
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* stuff somewhere possible).
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* I (Michael) did not check them, these are just the alignments which I think
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* could be reached easily ...
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*
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* !future video codecs might need functions with less strict alignment
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*/
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struct MpegEncContext;
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/* Motion estimation:
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* h is limited to { width / 2, width, 2 * width },
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* but never larger than 16 and never smaller than 2.
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* Although currently h < 4 is not used as functions with
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* width < 8 are neither used nor implemented. */
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typedef int (*me_cmp_func)(struct MpegEncContext *c,
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uint8_t *blk1 /* align width (8 or 16) */,
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uint8_t *blk2 /* align 1 */, int line_size, int 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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/**
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* DSPContext.
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*/
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typedef struct DSPContext {
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/* pixel ops : interface with DCT */
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void (*get_pixels)(int16_t *block /* align 16 */,
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const uint8_t *pixels /* align 8 */,
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int line_size);
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void (*diff_pixels)(int16_t *block /* align 16 */,
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const uint8_t *s1 /* align 8 */,
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const uint8_t *s2 /* align 8 */,
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int stride);
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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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int (*sum_abs_dctelem)(int16_t *block /* align 16 */);
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int (*pix_sum)(uint8_t *pix, int line_size);
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int (*pix_norm1)(uint8_t *pix, int line_size);
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me_cmp_func sad[6]; /* identical to pix_absAxA except additional void * */
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me_cmp_func sse[6];
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me_cmp_func hadamard8_diff[6];
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me_cmp_func dct_sad[6];
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me_cmp_func quant_psnr[6];
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me_cmp_func bit[6];
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me_cmp_func rd[6];
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me_cmp_func vsad[6];
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me_cmp_func vsse[6];
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me_cmp_func nsse[6];
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me_cmp_func w53[6];
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me_cmp_func w97[6];
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me_cmp_func dct_max[6];
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me_cmp_func dct264_sad[6];
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me_cmp_func me_pre_cmp[6];
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me_cmp_func me_cmp[6];
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me_cmp_func me_sub_cmp[6];
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me_cmp_func mb_cmp[6];
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me_cmp_func ildct_cmp[6]; // only width 16 used
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me_cmp_func frame_skip_cmp[6]; // only width 8 used
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me_cmp_func pix_abs[2][4];
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/* (I)DCT */
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void (*fdct)(int16_t *block /* align 16 */);
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void (*fdct248)(int16_t *block /* align 16 */);
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/* IDCT really */
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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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int (*try_8x8basis)(int16_t rem[64], int16_t weight[64],
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int16_t basis[64], int scale);
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void (*add_8x8basis)(int16_t rem[64], int16_t basis[64], int scale);
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#define BASIS_SHIFT 16
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#define RECON_SHIFT 6
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void (*draw_edges)(uint8_t *buf, int wrap, int width, int height,
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int w, int h, int sides);
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#define EDGE_WIDTH 16
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#define EDGE_TOP 1
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#define EDGE_BOTTOM 2
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void (*shrink[4])(uint8_t *dst, int dst_wrap, const uint8_t *src,
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int src_wrap, int width, int height);
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} DSPContext;
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void ff_dsputil_static_init(void);
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void ff_dsputil_init(DSPContext *p, AVCodecContext *avctx);
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void avpriv_dsputil_init(DSPContext* p, AVCodecContext *avctx);
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attribute_deprecated void dsputil_init(DSPContext* c, AVCodecContext *avctx);
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int ff_check_alignment(void);
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void ff_set_cmp(DSPContext *c, me_cmp_func *cmp, int type);
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void ff_dsputil_init_alpha(DSPContext* c, AVCodecContext *avctx);
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void ff_dsputil_init_arm(DSPContext *c, AVCodecContext *avctx,
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unsigned high_bit_depth);
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void ff_dsputil_init_ppc(DSPContext *c, AVCodecContext *avctx,
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unsigned high_bit_depth);
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void ff_dsputil_init_x86(DSPContext *c, AVCodecContext *avctx,
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unsigned high_bit_depth);
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void ff_dsputil_init_dwt(DSPContext *c);
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#endif /* AVCODEC_DSPUTIL_H */
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