mirror of
https://github.com/xenia-project/FFmpeg.git
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266 lines
9.1 KiB
C
266 lines
9.1 KiB
C
/*
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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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#include "libavutil/attributes.h"
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#include "libavutil/common.h"
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#include "avcodec.h"
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#include "idctdsp.h"
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#include "mathops.h"
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#include "wmv2dsp.h"
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#define W0 2048
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#define W1 2841 /* 2048*sqrt (2)*cos (1*pi/16) */
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#define W2 2676 /* 2048*sqrt (2)*cos (2*pi/16) */
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#define W3 2408 /* 2048*sqrt (2)*cos (3*pi/16) */
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#define W4 2048 /* 2048*sqrt (2)*cos (4*pi/16) */
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#define W5 1609 /* 2048*sqrt (2)*cos (5*pi/16) */
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#define W6 1108 /* 2048*sqrt (2)*cos (6*pi/16) */
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#define W7 565 /* 2048*sqrt (2)*cos (7*pi/16) */
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static void wmv2_idct_row(short * b)
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{
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int s1, s2;
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int a0, a1, a2, a3, a4, a5, a6, a7;
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/* step 1 */
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a1 = W1 * b[1] + W7 * b[7];
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a7 = W7 * b[1] - W1 * b[7];
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a5 = W5 * b[5] + W3 * b[3];
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a3 = W3 * b[5] - W5 * b[3];
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a2 = W2 * b[2] + W6 * b[6];
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a6 = W6 * b[2] - W2 * b[6];
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a0 = W0 * b[0] + W0 * b[4];
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a4 = W0 * b[0] - W0 * b[4];
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/* step 2 */
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s1 = (181 * (a1 - a5 + a7 - a3) + 128) >> 8; // 1, 3, 5, 7
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s2 = (181 * (a1 - a5 - a7 + a3) + 128) >> 8;
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/* step 3 */
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b[0] = (a0 + a2 + a1 + a5 + (1 << 7)) >> 8;
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b[1] = (a4 + a6 + s1 + (1 << 7)) >> 8;
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b[2] = (a4 - a6 + s2 + (1 << 7)) >> 8;
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b[3] = (a0 - a2 + a7 + a3 + (1 << 7)) >> 8;
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b[4] = (a0 - a2 - a7 - a3 + (1 << 7)) >> 8;
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b[5] = (a4 - a6 - s2 + (1 << 7)) >> 8;
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b[6] = (a4 + a6 - s1 + (1 << 7)) >> 8;
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b[7] = (a0 + a2 - a1 - a5 + (1 << 7)) >> 8;
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}
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static void wmv2_idct_col(short * b)
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{
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int s1, s2;
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int a0, a1, a2, a3, a4, a5, a6, a7;
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/* step 1, with extended precision */
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a1 = (W1 * b[8 * 1] + W7 * b[8 * 7] + 4) >> 3;
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a7 = (W7 * b[8 * 1] - W1 * b[8 * 7] + 4) >> 3;
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a5 = (W5 * b[8 * 5] + W3 * b[8 * 3] + 4) >> 3;
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a3 = (W3 * b[8 * 5] - W5 * b[8 * 3] + 4) >> 3;
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a2 = (W2 * b[8 * 2] + W6 * b[8 * 6] + 4) >> 3;
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a6 = (W6 * b[8 * 2] - W2 * b[8 * 6] + 4) >> 3;
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a0 = (W0 * b[8 * 0] + W0 * b[8 * 4] ) >> 3;
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a4 = (W0 * b[8 * 0] - W0 * b[8 * 4] ) >> 3;
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/* step 2 */
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s1 = (181 * (a1 - a5 + a7 - a3) + 128) >> 8;
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s2 = (181 * (a1 - a5 - a7 + a3) + 128) >> 8;
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/* step 3 */
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b[8 * 0] = (a0 + a2 + a1 + a5 + (1 << 13)) >> 14;
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b[8 * 1] = (a4 + a6 + s1 + (1 << 13)) >> 14;
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b[8 * 2] = (a4 - a6 + s2 + (1 << 13)) >> 14;
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b[8 * 3] = (a0 - a2 + a7 + a3 + (1 << 13)) >> 14;
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b[8 * 4] = (a0 - a2 - a7 - a3 + (1 << 13)) >> 14;
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b[8 * 5] = (a4 - a6 - s2 + (1 << 13)) >> 14;
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b[8 * 6] = (a4 + a6 - s1 + (1 << 13)) >> 14;
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b[8 * 7] = (a0 + a2 - a1 - a5 + (1 << 13)) >> 14;
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}
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static void wmv2_idct_add_c(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
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{
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int i;
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for (i = 0; i < 64; i += 8)
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wmv2_idct_row(block + i);
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for (i = 0; i < 8; i++)
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wmv2_idct_col(block + i);
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for (i = 0; i < 8; i++) {
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dest[0] = av_clip_uint8(dest[0] + block[0]);
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dest[1] = av_clip_uint8(dest[1] + block[1]);
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dest[2] = av_clip_uint8(dest[2] + block[2]);
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dest[3] = av_clip_uint8(dest[3] + block[3]);
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dest[4] = av_clip_uint8(dest[4] + block[4]);
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dest[5] = av_clip_uint8(dest[5] + block[5]);
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dest[6] = av_clip_uint8(dest[6] + block[6]);
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dest[7] = av_clip_uint8(dest[7] + block[7]);
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dest += line_size;
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block += 8;
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}
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}
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static void wmv2_idct_put_c(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
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{
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int i;
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for (i = 0; i < 64; i += 8)
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wmv2_idct_row(block + i);
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for (i = 0; i < 8; i++)
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wmv2_idct_col(block + i);
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for (i = 0; i < 8; i++) {
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dest[0] = av_clip_uint8(block[0]);
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dest[1] = av_clip_uint8(block[1]);
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dest[2] = av_clip_uint8(block[2]);
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dest[3] = av_clip_uint8(block[3]);
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dest[4] = av_clip_uint8(block[4]);
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dest[5] = av_clip_uint8(block[5]);
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dest[6] = av_clip_uint8(block[6]);
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dest[7] = av_clip_uint8(block[7]);
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dest += line_size;
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block += 8;
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}
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}
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static void wmv2_mspel8_h_lowpass(uint8_t *dst, const uint8_t *src,
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int dstStride, int srcStride, int h)
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{
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const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
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int i;
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for (i = 0; i < h; i++) {
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dst[0] = cm[(9 * (src[0] + src[1]) - (src[-1] + src[2]) + 8) >> 4];
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dst[1] = cm[(9 * (src[1] + src[2]) - (src[0] + src[3]) + 8) >> 4];
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dst[2] = cm[(9 * (src[2] + src[3]) - (src[1] + src[4]) + 8) >> 4];
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dst[3] = cm[(9 * (src[3] + src[4]) - (src[2] + src[5]) + 8) >> 4];
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dst[4] = cm[(9 * (src[4] + src[5]) - (src[3] + src[6]) + 8) >> 4];
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dst[5] = cm[(9 * (src[5] + src[6]) - (src[4] + src[7]) + 8) >> 4];
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dst[6] = cm[(9 * (src[6] + src[7]) - (src[5] + src[8]) + 8) >> 4];
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dst[7] = cm[(9 * (src[7] + src[8]) - (src[6] + src[9]) + 8) >> 4];
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dst += dstStride;
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src += srcStride;
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}
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}
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static void wmv2_mspel8_v_lowpass(uint8_t *dst, const uint8_t *src,
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int dstStride, int srcStride, int w)
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{
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const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
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int i;
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for (i = 0; i < w; i++) {
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const int src_1 = src[-srcStride];
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const int src0 = src[0];
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const int src1 = src[srcStride];
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const int src2 = src[2 * srcStride];
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const int src3 = src[3 * srcStride];
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const int src4 = src[4 * srcStride];
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const int src5 = src[5 * srcStride];
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const int src6 = src[6 * srcStride];
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const int src7 = src[7 * srcStride];
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const int src8 = src[8 * srcStride];
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const int src9 = src[9 * srcStride];
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dst[0 * dstStride] = cm[(9 * (src0 + src1) - (src_1 + src2) + 8) >> 4];
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dst[1 * dstStride] = cm[(9 * (src1 + src2) - (src0 + src3) + 8) >> 4];
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dst[2 * dstStride] = cm[(9 * (src2 + src3) - (src1 + src4) + 8) >> 4];
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dst[3 * dstStride] = cm[(9 * (src3 + src4) - (src2 + src5) + 8) >> 4];
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dst[4 * dstStride] = cm[(9 * (src4 + src5) - (src3 + src6) + 8) >> 4];
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dst[5 * dstStride] = cm[(9 * (src5 + src6) - (src4 + src7) + 8) >> 4];
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dst[6 * dstStride] = cm[(9 * (src6 + src7) - (src5 + src8) + 8) >> 4];
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dst[7 * dstStride] = cm[(9 * (src7 + src8) - (src6 + src9) + 8) >> 4];
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src++;
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dst++;
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}
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}
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static void put_mspel8_mc10_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)
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{
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uint8_t half[64];
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wmv2_mspel8_h_lowpass(half, src, 8, stride, 8);
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ff_put_pixels8_l2_8(dst, src, half, stride, stride, 8, 8);
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}
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static void put_mspel8_mc20_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)
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{
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wmv2_mspel8_h_lowpass(dst, src, stride, stride, 8);
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}
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static void put_mspel8_mc30_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)
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{
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uint8_t half[64];
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wmv2_mspel8_h_lowpass(half, src, 8, stride, 8);
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ff_put_pixels8_l2_8(dst, src + 1, half, stride, stride, 8, 8);
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}
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static void put_mspel8_mc02_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)
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{
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wmv2_mspel8_v_lowpass(dst, src, stride, stride, 8);
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}
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static void put_mspel8_mc12_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)
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{
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uint8_t halfH[88];
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uint8_t halfV[64];
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uint8_t halfHV[64];
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wmv2_mspel8_h_lowpass(halfH, src - stride, 8, stride, 11);
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wmv2_mspel8_v_lowpass(halfV, src, 8, stride, 8);
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wmv2_mspel8_v_lowpass(halfHV, halfH + 8, 8, 8, 8);
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ff_put_pixels8_l2_8(dst, halfV, halfHV, stride, 8, 8, 8);
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}
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static void put_mspel8_mc32_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)
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{
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uint8_t halfH[88];
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uint8_t halfV[64];
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uint8_t halfHV[64];
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wmv2_mspel8_h_lowpass(halfH, src - stride, 8, stride, 11);
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wmv2_mspel8_v_lowpass(halfV, src + 1, 8, stride, 8);
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wmv2_mspel8_v_lowpass(halfHV, halfH + 8, 8, 8, 8);
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ff_put_pixels8_l2_8(dst, halfV, halfHV, stride, 8, 8, 8);
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}
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static void put_mspel8_mc22_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)
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{
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uint8_t halfH[88];
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wmv2_mspel8_h_lowpass(halfH, src - stride, 8, stride, 11);
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wmv2_mspel8_v_lowpass(dst, halfH + 8, stride, 8, 8);
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}
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av_cold void ff_wmv2dsp_init(WMV2DSPContext *c)
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{
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c->idct_add = wmv2_idct_add_c;
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c->idct_put = wmv2_idct_put_c;
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c->idct_perm = FF_IDCT_PERM_NONE;
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c->put_mspel_pixels_tab[0] = ff_put_pixels8x8_c;
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c->put_mspel_pixels_tab[1] = put_mspel8_mc10_c;
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c->put_mspel_pixels_tab[2] = put_mspel8_mc20_c;
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c->put_mspel_pixels_tab[3] = put_mspel8_mc30_c;
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c->put_mspel_pixels_tab[4] = put_mspel8_mc02_c;
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c->put_mspel_pixels_tab[5] = put_mspel8_mc12_c;
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c->put_mspel_pixels_tab[6] = put_mspel8_mc22_c;
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c->put_mspel_pixels_tab[7] = put_mspel8_mc32_c;
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}
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