diff options
Diffstat (limited to 'ffmpeg/libavcodec/wmv2dsp.c')
| -rw-r--r-- | ffmpeg/libavcodec/wmv2dsp.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/ffmpeg/libavcodec/wmv2dsp.c b/ffmpeg/libavcodec/wmv2dsp.c deleted file mode 100644 index 9627442..0000000 --- a/ffmpeg/libavcodec/wmv2dsp.c +++ /dev/null @@ -1,146 +0,0 @@ -/* - * 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 - */ - -#include "libavutil/attributes.h" -#include "libavutil/common.h" -#include "avcodec.h" -#include "dsputil.h" -#include "wmv2dsp.h" - -#define W0 2048 -#define W1 2841 /* 2048*sqrt (2)*cos (1*pi/16) */ -#define W2 2676 /* 2048*sqrt (2)*cos (2*pi/16) */ -#define W3 2408 /* 2048*sqrt (2)*cos (3*pi/16) */ -#define W4 2048 /* 2048*sqrt (2)*cos (4*pi/16) */ -#define W5 1609 /* 2048*sqrt (2)*cos (5*pi/16) */ -#define W6 1108 /* 2048*sqrt (2)*cos (6*pi/16) */ -#define W7 565 /* 2048*sqrt (2)*cos (7*pi/16) */ - -static void wmv2_idct_row(short * b) -{ - int s1, s2; - int a0, a1, a2, a3, a4, a5, a6, a7; - - /* step 1 */ - a1 = W1 * b[1] + W7 * b[7]; - a7 = W7 * b[1] - W1 * b[7]; - a5 = W5 * b[5] + W3 * b[3]; - a3 = W3 * b[5] - W5 * b[3]; - a2 = W2 * b[2] + W6 * b[6]; - a6 = W6 * b[2] - W2 * b[6]; - a0 = W0 * b[0] + W0 * b[4]; - a4 = W0 * b[0] - W0 * b[4]; - - /* step 2 */ - s1 = (181 * (a1 - a5 + a7 - a3) + 128) >> 8; // 1, 3, 5, 7 - s2 = (181 * (a1 - a5 - a7 + a3) + 128) >> 8; - - /* step 3 */ - b[0] = (a0 + a2 + a1 + a5 + (1 << 7)) >> 8; - b[1] = (a4 + a6 + s1 + (1 << 7)) >> 8; - b[2] = (a4 - a6 + s2 + (1 << 7)) >> 8; - b[3] = (a0 - a2 + a7 + a3 + (1 << 7)) >> 8; - b[4] = (a0 - a2 - a7 - a3 + (1 << 7)) >> 8; - b[5] = (a4 - a6 - s2 + (1 << 7)) >> 8; - b[6] = (a4 + a6 - s1 + (1 << 7)) >> 8; - b[7] = (a0 + a2 - a1 - a5 + (1 << 7)) >> 8; -} - -static void wmv2_idct_col(short * b) -{ - int s1, s2; - int a0, a1, a2, a3, a4, a5, a6, a7; - - /* step 1, with extended precision */ - a1 = (W1 * b[8 * 1] + W7 * b[8 * 7] + 4) >> 3; - a7 = (W7 * b[8 * 1] - W1 * b[8 * 7] + 4) >> 3; - a5 = (W5 * b[8 * 5] + W3 * b[8 * 3] + 4) >> 3; - a3 = (W3 * b[8 * 5] - W5 * b[8 * 3] + 4) >> 3; - a2 = (W2 * b[8 * 2] + W6 * b[8 * 6] + 4) >> 3; - a6 = (W6 * b[8 * 2] - W2 * b[8 * 6] + 4) >> 3; - a0 = (W0 * b[8 * 0] + W0 * b[8 * 4] ) >> 3; - a4 = (W0 * b[8 * 0] - W0 * b[8 * 4] ) >> 3; - - /* step 2 */ - s1 = (181 * (a1 - a5 + a7 - a3) + 128) >> 8; - s2 = (181 * (a1 - a5 - a7 + a3) + 128) >> 8; - - /* step 3 */ - b[8 * 0] = (a0 + a2 + a1 + a5 + (1 << 13)) >> 14; - b[8 * 1] = (a4 + a6 + s1 + (1 << 13)) >> 14; - b[8 * 2] = (a4 - a6 + s2 + (1 << 13)) >> 14; - b[8 * 3] = (a0 - a2 + a7 + a3 + (1 << 13)) >> 14; - - b[8 * 4] = (a0 - a2 - a7 - a3 + (1 << 13)) >> 14; - b[8 * 5] = (a4 - a6 - s2 + (1 << 13)) >> 14; - b[8 * 6] = (a4 + a6 - s1 + (1 << 13)) >> 14; - b[8 * 7] = (a0 + a2 - a1 - a5 + (1 << 13)) >> 14; -} - -static void wmv2_idct_add_c(uint8_t *dest, int line_size, int16_t *block) -{ - int i; - - for (i = 0; i < 64; i += 8) - wmv2_idct_row(block + i); - for (i = 0; i < 8; i++) - wmv2_idct_col(block + i); - - for (i = 0; i < 8; i++) { - dest[0] = av_clip_uint8(dest[0] + block[0]); - dest[1] = av_clip_uint8(dest[1] + block[1]); - dest[2] = av_clip_uint8(dest[2] + block[2]); - dest[3] = av_clip_uint8(dest[3] + block[3]); - dest[4] = av_clip_uint8(dest[4] + block[4]); - dest[5] = av_clip_uint8(dest[5] + block[5]); - dest[6] = av_clip_uint8(dest[6] + block[6]); - dest[7] = av_clip_uint8(dest[7] + block[7]); - dest += line_size; - block += 8; - } -} - -static void wmv2_idct_put_c(uint8_t *dest, int line_size, int16_t *block) -{ - int i; - - for (i = 0; i < 64; i += 8) - wmv2_idct_row(block + i); - for (i = 0; i < 8; i++) - wmv2_idct_col(block + i); - - for (i = 0; i < 8; i++) { - dest[0] = av_clip_uint8(block[0]); - dest[1] = av_clip_uint8(block[1]); - dest[2] = av_clip_uint8(block[2]); - dest[3] = av_clip_uint8(block[3]); - dest[4] = av_clip_uint8(block[4]); - dest[5] = av_clip_uint8(block[5]); - dest[6] = av_clip_uint8(block[6]); - dest[7] = av_clip_uint8(block[7]); - dest += line_size; - block += 8; - } -} - -av_cold void ff_wmv2dsp_init(WMV2DSPContext *c) -{ - c->idct_add = wmv2_idct_add_c; - c->idct_put = wmv2_idct_put_c; - c->idct_perm = FF_NO_IDCT_PERM; -} |