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https://github.com/FFmpeg/FFmpeg.git
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4209216ee8
It is only used by gmc/gmc1 which is only used by the MPEG-4 decoder, so move it to Mpeg4DecContext and rename it to Mpeg4VideoDSP. Also compile it iff the MPEG-4 decoder is compiled. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
121 lines
4.4 KiB
C
121 lines
4.4 KiB
C
/*
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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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#include "config.h"
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#include "libavutil/attributes.h"
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#include "libavutil/common.h"
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#include "mpeg4videodsp.h"
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static void gmc1_c(uint8_t *dst, const uint8_t *src, int stride, int h,
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int x16, int y16, int rounder)
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{
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const int A = (16 - x16) * (16 - y16);
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const int B = (x16) * (16 - y16);
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const int C = (16 - x16) * (y16);
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const int D = (x16) * (y16);
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int i;
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for (i = 0; i < h; i++) {
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dst[0] = (A * src[0] + B * src[1] + C * src[stride + 0] + D * src[stride + 1] + rounder) >> 8;
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dst[1] = (A * src[1] + B * src[2] + C * src[stride + 1] + D * src[stride + 2] + rounder) >> 8;
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dst[2] = (A * src[2] + B * src[3] + C * src[stride + 2] + D * src[stride + 3] + rounder) >> 8;
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dst[3] = (A * src[3] + B * src[4] + C * src[stride + 3] + D * src[stride + 4] + rounder) >> 8;
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dst[4] = (A * src[4] + B * src[5] + C * src[stride + 4] + D * src[stride + 5] + rounder) >> 8;
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dst[5] = (A * src[5] + B * src[6] + C * src[stride + 5] + D * src[stride + 6] + rounder) >> 8;
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dst[6] = (A * src[6] + B * src[7] + C * src[stride + 6] + D * src[stride + 7] + rounder) >> 8;
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dst[7] = (A * src[7] + B * src[8] + C * src[stride + 7] + D * src[stride + 8] + rounder) >> 8;
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dst += stride;
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src += stride;
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}
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}
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void ff_gmc_c(uint8_t *dst, const uint8_t *src, int stride, int h, int ox, int oy,
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int dxx, int dxy, int dyx, int dyy, int shift, int r,
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int width, int height)
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{
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int y, vx, vy;
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const int s = 1 << shift;
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width--;
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height--;
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for (y = 0; y < h; y++) {
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int x;
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vx = ox;
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vy = oy;
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for (x = 0; x < 8; x++) { // FIXME: optimize
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int index;
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int src_x = vx >> 16;
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int src_y = vy >> 16;
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int frac_x = src_x & (s - 1);
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int frac_y = src_y & (s - 1);
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src_x >>= shift;
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src_y >>= shift;
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if ((unsigned) src_x < width) {
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if ((unsigned) src_y < height) {
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index = src_x + src_y * stride;
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dst[y * stride + x] =
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((src[index] * (s - frac_x) +
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src[index + 1] * frac_x) * (s - frac_y) +
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(src[index + stride] * (s - frac_x) +
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src[index + stride + 1] * frac_x) * frac_y +
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r) >> (shift * 2);
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} else {
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index = src_x + av_clip(src_y, 0, height) * stride;
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dst[y * stride + x] =
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((src[index] * (s - frac_x) +
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src[index + 1] * frac_x) * s +
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r) >> (shift * 2);
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}
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} else {
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if ((unsigned) src_y < height) {
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index = av_clip(src_x, 0, width) + src_y * stride;
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dst[y * stride + x] =
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((src[index] * (s - frac_y) +
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src[index + stride] * frac_y) * s +
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r) >> (shift * 2);
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} else {
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index = av_clip(src_x, 0, width) +
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av_clip(src_y, 0, height) * stride;
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dst[y * stride + x] = src[index];
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}
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}
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vx += dxx;
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vy += dyx;
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}
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ox += dxy;
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oy += dyy;
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}
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}
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av_cold void ff_mpeg4videodsp_init(Mpeg4VideoDSPContext *c)
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{
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c->gmc1 = gmc1_c;
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c->gmc = ff_gmc_c;
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#if ARCH_PPC
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ff_mpeg4videodsp_init_ppc(c);
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#elif ARCH_X86
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ff_mpeg4videodsp_init_x86(c);
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#endif
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}
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