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Diffstat (limited to 'ffmpeg/libavcodec/vp3dsp.c')
| -rw-r--r-- | ffmpeg/libavcodec/vp3dsp.c | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/vp3dsp.c b/ffmpeg/libavcodec/vp3dsp.c new file mode 100644 index 0000000..9348963 --- /dev/null +++ b/ffmpeg/libavcodec/vp3dsp.c @@ -0,0 +1,298 @@ +/* + * Copyright (C) 2004 the ffmpeg project + * + * 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 + */ + +/** + * @file + * Standard C DSP-oriented functions cribbed from the original VP3 + * source code. + */ + +#include "libavutil/attributes.h" +#include "libavutil/common.h" +#include "avcodec.h" +#include "dsputil.h" +#include "rnd_avg.h" +#include "vp3dsp.h" + +#define IdctAdjustBeforeShift 8 +#define xC1S7 64277 +#define xC2S6 60547 +#define xC3S5 54491 +#define xC4S4 46341 +#define xC5S3 36410 +#define xC6S2 25080 +#define xC7S1 12785 + +#define M(a,b) (((a) * (b))>>16) + +static av_always_inline void idct(uint8_t *dst, int stride, int16_t *input, int type) +{ + int16_t *ip = input; + + int A, B, C, D, Ad, Bd, Cd, Dd, E, F, G, H; + int Ed, Gd, Add, Bdd, Fd, Hd; + + int i; + + /* Inverse DCT on the rows now */ + for (i = 0; i < 8; i++) { + /* Check for non-zero values */ + if ( ip[0 * 8] | ip[1 * 8] | ip[2 * 8] | ip[3 * 8] | + ip[4 * 8] | ip[5 * 8] | ip[6 * 8] | ip[7 * 8] ) { + A = M(xC1S7, ip[1 * 8]) + M(xC7S1, ip[7 * 8]); + B = M(xC7S1, ip[1 * 8]) - M(xC1S7, ip[7 * 8]); + C = M(xC3S5, ip[3 * 8]) + M(xC5S3, ip[5 * 8]); + D = M(xC3S5, ip[5 * 8]) - M(xC5S3, ip[3 * 8]); + + Ad = M(xC4S4, (A - C)); + Bd = M(xC4S4, (B - D)); + + Cd = A + C; + Dd = B + D; + + E = M(xC4S4, (ip[0 * 8] + ip[4 * 8])); + F = M(xC4S4, (ip[0 * 8] - ip[4 * 8])); + + G = M(xC2S6, ip[2 * 8]) + M(xC6S2, ip[6 * 8]); + H = M(xC6S2, ip[2 * 8]) - M(xC2S6, ip[6 * 8]); + + Ed = E - G; + Gd = E + G; + + Add = F + Ad; + Bdd = Bd - H; + + Fd = F - Ad; + Hd = Bd + H; + + /* Final sequence of operations over-write original inputs. */ + ip[0 * 8] = Gd + Cd ; + ip[7 * 8] = Gd - Cd ; + + ip[1 * 8] = Add + Hd; + ip[2 * 8] = Add - Hd; + + ip[3 * 8] = Ed + Dd ; + ip[4 * 8] = Ed - Dd ; + + ip[5 * 8] = Fd + Bdd; + ip[6 * 8] = Fd - Bdd; + } + + ip += 1; /* next row */ + } + + ip = input; + + for ( i = 0; i < 8; i++) { + /* Check for non-zero values (bitwise or faster than ||) */ + if ( ip[1] | ip[2] | ip[3] | + ip[4] | ip[5] | ip[6] | ip[7] ) { + + A = M(xC1S7, ip[1]) + M(xC7S1, ip[7]); + B = M(xC7S1, ip[1]) - M(xC1S7, ip[7]); + C = M(xC3S5, ip[3]) + M(xC5S3, ip[5]); + D = M(xC3S5, ip[5]) - M(xC5S3, ip[3]); + + Ad = M(xC4S4, (A - C)); + Bd = M(xC4S4, (B - D)); + + Cd = A + C; + Dd = B + D; + + E = M(xC4S4, (ip[0] + ip[4])) + 8; + F = M(xC4S4, (ip[0] - ip[4])) + 8; + + if(type==1){ //HACK + E += 16*128; + F += 16*128; + } + + G = M(xC2S6, ip[2]) + M(xC6S2, ip[6]); + H = M(xC6S2, ip[2]) - M(xC2S6, ip[6]); + + Ed = E - G; + Gd = E + G; + + Add = F + Ad; + Bdd = Bd - H; + + Fd = F - Ad; + Hd = Bd + H; + + /* Final sequence of operations over-write original inputs. */ + if(type==1){ + dst[0*stride] = av_clip_uint8((Gd + Cd ) >> 4); + dst[7*stride] = av_clip_uint8((Gd - Cd ) >> 4); + + dst[1*stride] = av_clip_uint8((Add + Hd ) >> 4); + dst[2*stride] = av_clip_uint8((Add - Hd ) >> 4); + + dst[3*stride] = av_clip_uint8((Ed + Dd ) >> 4); + dst[4*stride] = av_clip_uint8((Ed - Dd ) >> 4); + + dst[5*stride] = av_clip_uint8((Fd + Bdd ) >> 4); + dst[6*stride] = av_clip_uint8((Fd - Bdd ) >> 4); + }else{ + dst[0*stride] = av_clip_uint8(dst[0*stride] + ((Gd + Cd ) >> 4)); + dst[7*stride] = av_clip_uint8(dst[7*stride] + ((Gd - Cd ) >> 4)); + + dst[1*stride] = av_clip_uint8(dst[1*stride] + ((Add + Hd ) >> 4)); + dst[2*stride] = av_clip_uint8(dst[2*stride] + ((Add - Hd ) >> 4)); + + dst[3*stride] = av_clip_uint8(dst[3*stride] + ((Ed + Dd ) >> 4)); + dst[4*stride] = av_clip_uint8(dst[4*stride] + ((Ed - Dd ) >> 4)); + + dst[5*stride] = av_clip_uint8(dst[5*stride] + ((Fd + Bdd ) >> 4)); + dst[6*stride] = av_clip_uint8(dst[6*stride] + ((Fd - Bdd ) >> 4)); + } + + } else { + if(type==1){ + dst[0*stride]= + dst[1*stride]= + dst[2*stride]= + dst[3*stride]= + dst[4*stride]= + dst[5*stride]= + dst[6*stride]= + dst[7*stride]= av_clip_uint8(128 + ((xC4S4 * ip[0] + (IdctAdjustBeforeShift<<16))>>20)); + }else{ + if(ip[0]){ + int v= ((xC4S4 * ip[0] + (IdctAdjustBeforeShift<<16))>>20); + dst[0*stride] = av_clip_uint8(dst[0*stride] + v); + dst[1*stride] = av_clip_uint8(dst[1*stride] + v); + dst[2*stride] = av_clip_uint8(dst[2*stride] + v); + dst[3*stride] = av_clip_uint8(dst[3*stride] + v); + dst[4*stride] = av_clip_uint8(dst[4*stride] + v); + dst[5*stride] = av_clip_uint8(dst[5*stride] + v); + dst[6*stride] = av_clip_uint8(dst[6*stride] + v); + dst[7*stride] = av_clip_uint8(dst[7*stride] + v); + } + } + } + + ip += 8; /* next column */ + dst++; + } +} + +static void vp3_idct_put_c(uint8_t *dest/*align 8*/, int line_size, + int16_t *block/*align 16*/) +{ + idct(dest, line_size, block, 1); + memset(block, 0, sizeof(*block) * 64); +} + +static void vp3_idct_add_c(uint8_t *dest/*align 8*/, int line_size, + int16_t *block/*align 16*/) +{ + idct(dest, line_size, block, 2); + memset(block, 0, sizeof(*block) * 64); +} + +static void vp3_idct_dc_add_c(uint8_t *dest/*align 8*/, int line_size, + int16_t *block/*align 16*/) +{ + int i, dc = (block[0] + 15) >> 5; + + for(i = 0; i < 8; i++){ + dest[0] = av_clip_uint8(dest[0] + dc); + dest[1] = av_clip_uint8(dest[1] + dc); + dest[2] = av_clip_uint8(dest[2] + dc); + dest[3] = av_clip_uint8(dest[3] + dc); + dest[4] = av_clip_uint8(dest[4] + dc); + dest[5] = av_clip_uint8(dest[5] + dc); + dest[6] = av_clip_uint8(dest[6] + dc); + dest[7] = av_clip_uint8(dest[7] + dc); + dest += line_size; + } + block[0] = 0; +} + +static void vp3_v_loop_filter_c(uint8_t *first_pixel, int stride, + int *bounding_values) +{ + unsigned char *end; + int filter_value; + const int nstride= -stride; + + for (end= first_pixel + 8; first_pixel < end; first_pixel++) { + filter_value = + (first_pixel[2 * nstride] - first_pixel[ stride]) + +3*(first_pixel[0 ] - first_pixel[nstride]); + filter_value = bounding_values[(filter_value + 4) >> 3]; + first_pixel[nstride] = av_clip_uint8(first_pixel[nstride] + filter_value); + first_pixel[0] = av_clip_uint8(first_pixel[0] - filter_value); + } +} + +static void vp3_h_loop_filter_c(uint8_t *first_pixel, int stride, + int *bounding_values) +{ + unsigned char *end; + int filter_value; + + for (end= first_pixel + 8*stride; first_pixel != end; first_pixel += stride) { + filter_value = + (first_pixel[-2] - first_pixel[ 1]) + +3*(first_pixel[ 0] - first_pixel[-1]); + filter_value = bounding_values[(filter_value + 4) >> 3]; + first_pixel[-1] = av_clip_uint8(first_pixel[-1] + filter_value); + first_pixel[ 0] = av_clip_uint8(first_pixel[ 0] - filter_value); + } +} + +static void put_no_rnd_pixels_l2(uint8_t *dst, const uint8_t *src1, + const uint8_t *src2, ptrdiff_t stride, int h) +{ + int i; + + for (i = 0; i < h; i++) { + uint32_t a, b; + + a = AV_RN32(&src1[i * stride]); + b = AV_RN32(&src2[i * stride]); + AV_WN32A(&dst[i * stride], no_rnd_avg32(a, b)); + a = AV_RN32(&src1[i * stride + 4]); + b = AV_RN32(&src2[i * stride + 4]); + AV_WN32A(&dst[i * stride + 4], no_rnd_avg32(a, b)); + } +} + +av_cold void ff_vp3dsp_init(VP3DSPContext *c, int flags) +{ + c->put_no_rnd_pixels_l2 = put_no_rnd_pixels_l2; + + c->idct_put = vp3_idct_put_c; + c->idct_add = vp3_idct_add_c; + c->idct_dc_add = vp3_idct_dc_add_c; + c->v_loop_filter = vp3_v_loop_filter_c; + c->h_loop_filter = vp3_h_loop_filter_c; + + if (ARCH_ARM) + ff_vp3dsp_init_arm(c, flags); + if (ARCH_BFIN) + ff_vp3dsp_init_bfin(c, flags); + if (ARCH_PPC) + ff_vp3dsp_init_ppc(c, flags); + if (ARCH_X86) + ff_vp3dsp_init_x86(c, flags); +} |