yading@10: /* yading@10: * Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder DSP routines yading@10: */ yading@10: yading@10: #include "mss2dsp.h" yading@10: #include "libavutil/common.h" yading@10: yading@10: static av_always_inline void mss2_blit_wmv9_template(uint8_t *dst, yading@10: int dst_stride, yading@10: int gray, yading@10: int use_mask, yading@10: int maskcolor, yading@10: const uint8_t *mask, yading@10: int mask_stride, yading@10: const uint8_t *srcy, yading@10: int srcy_stride, yading@10: const uint8_t *srcu, yading@10: const uint8_t *srcv, yading@10: int srcuv_stride, yading@10: int w, int h) yading@10: { yading@10: int i, j, k, r = -1; yading@10: while (++r < h) { yading@10: for (i = 0, j = 0, k = 0; i < w; j += (i & 1), i++, k += 3) { yading@10: if (!use_mask || mask[i] == maskcolor) { yading@10: if (gray) { yading@10: dst[k] = dst[k + 1] = dst[k + 2] = 0x80; yading@10: } else { yading@10: int y = srcy[i]; yading@10: int u = srcu[j] - 128; yading@10: int v = srcv[j] - 128; yading@10: dst[k] = av_clip_uint8(y + ( 91881 * v + 32768 >> 16)); yading@10: dst[k + 1] = av_clip_uint8(y + (-22554 * u - 46802 * v + 32768 >> 16)); yading@10: dst[k + 2] = av_clip_uint8(y + (116130 * u + 32768 >> 16)); yading@10: } yading@10: } yading@10: } yading@10: mask += mask_stride; yading@10: dst += dst_stride; yading@10: srcy += srcy_stride; yading@10: srcu += srcuv_stride * (r & 1); yading@10: srcv += srcuv_stride * (r & 1); yading@10: } yading@10: } yading@10: yading@10: static void mss2_blit_wmv9_c(uint8_t *dst, int dst_stride, yading@10: const uint8_t *srcy, int srcy_stride, yading@10: const uint8_t *srcu, const uint8_t *srcv, yading@10: int srcuv_stride, int w, int h) yading@10: { yading@10: mss2_blit_wmv9_template(dst, dst_stride, 0, 0, yading@10: 0, NULL, 0, yading@10: srcy, srcy_stride, yading@10: srcu, srcv, srcuv_stride, yading@10: w, h); yading@10: } yading@10: yading@10: static void mss2_blit_wmv9_masked_c(uint8_t *dst, int dst_stride, yading@10: int maskcolor, const uint8_t *mask, yading@10: int mask_stride, yading@10: const uint8_t *srcy, int srcy_stride, yading@10: const uint8_t *srcu, const uint8_t *srcv, yading@10: int srcuv_stride, int w, int h) yading@10: { yading@10: mss2_blit_wmv9_template(dst, dst_stride, 0, 1, yading@10: maskcolor, mask, mask_stride, yading@10: srcy, srcy_stride, yading@10: srcu, srcv, srcuv_stride, yading@10: w, h); yading@10: } yading@10: yading@10: static void mss2_gray_fill_masked_c(uint8_t *dst, int dst_stride, yading@10: int maskcolor, const uint8_t *mask, yading@10: int mask_stride, int w, int h) yading@10: { yading@10: mss2_blit_wmv9_template(dst, dst_stride, 1, 1, yading@10: maskcolor, mask, mask_stride, yading@10: NULL, 0, yading@10: NULL, NULL, 0, yading@10: w, h); yading@10: } yading@10: yading@10: static void upsample_plane_c(uint8_t *plane, int plane_stride, int w, int h) yading@10: { yading@10: uint8_t *src1, *src2, *dst1, *dst2, *p, a, b; yading@10: int i, j; yading@10: yading@10: if(!w || !h) yading@10: return; yading@10: yading@10: w += (w & 1); yading@10: h += (h & 1); yading@10: yading@10: j = h - 1; yading@10: yading@10: memcpy(plane + plane_stride * j, yading@10: plane + plane_stride * (j >> 1), yading@10: w); yading@10: yading@10: while ((j -= 2) > 0) { yading@10: dst1 = plane + plane_stride * (j + 1); yading@10: dst2 = plane + plane_stride * j; yading@10: src1 = plane + plane_stride * ((j + 1) >> 1); yading@10: src2 = plane + plane_stride * ( j >> 1); yading@10: yading@10: for (i = (w - 1) >> 1; i >= 0; i--) { yading@10: a = src1[i]; yading@10: b = src2[i]; yading@10: dst1[i] = (3 * a + b + 2) >> 2; yading@10: dst2[i] = (a + 3 * b + 2) >> 2; yading@10: } yading@10: } yading@10: yading@10: for (j = h - 1; j >= 0; j--) { yading@10: p = plane + plane_stride * j; yading@10: i = w - 1; yading@10: yading@10: p[i] = p[i >> 1]; yading@10: yading@10: while ((i -= 2) > 0) { yading@10: a = p[ i >> 1]; yading@10: b = p[(i + 1) >> 1]; yading@10: p[i] = (3 * a + b + 1) >> 2; yading@10: p[i + 1] = (a + 3 * b + 1) >> 2; yading@10: } yading@10: } yading@10: } yading@10: yading@10: av_cold void ff_mss2dsp_init(MSS2DSPContext* dsp) yading@10: { yading@10: dsp->mss2_blit_wmv9 = mss2_blit_wmv9_c; yading@10: dsp->mss2_blit_wmv9_masked = mss2_blit_wmv9_masked_c; yading@10: dsp->mss2_gray_fill_masked = mss2_gray_fill_masked_c; yading@10: dsp->upsample_plane = upsample_plane_c; yading@10: }