/* * Copyright 2011 Stefano Sabatini * Copyright 2012 Nicolas George * * 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 #include "libavutil/avassert.h" #include "libavutil/avutil.h" #include "libavutil/colorspace.h" #include "libavutil/intreadwrite.h" #include "libavutil/mem.h" #include "libavutil/pixdesc.h" #include "drawutils.h" #include "formats.h" enum { RED = 0, GREEN, BLUE, ALPHA }; int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt) { switch (pix_fmt) { case AV_PIX_FMT_0RGB: case AV_PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break; case AV_PIX_FMT_0BGR: case AV_PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break; case AV_PIX_FMT_RGB48LE: case AV_PIX_FMT_RGB48BE: case AV_PIX_FMT_RGBA64BE: case AV_PIX_FMT_RGBA64LE: case AV_PIX_FMT_RGB0: case AV_PIX_FMT_RGBA: case AV_PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break; case AV_PIX_FMT_BGR48LE: case AV_PIX_FMT_BGR48BE: case AV_PIX_FMT_BGRA64BE: case AV_PIX_FMT_BGRA64LE: case AV_PIX_FMT_BGRA: case AV_PIX_FMT_BGR0: case AV_PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break; case AV_PIX_FMT_GBRP9LE: case AV_PIX_FMT_GBRP9BE: case AV_PIX_FMT_GBRP10LE: case AV_PIX_FMT_GBRP10BE: case AV_PIX_FMT_GBRP12LE: case AV_PIX_FMT_GBRP12BE: case AV_PIX_FMT_GBRP14LE: case AV_PIX_FMT_GBRP14BE: case AV_PIX_FMT_GBRP16LE: case AV_PIX_FMT_GBRP16BE: case AV_PIX_FMT_GBRAP: case AV_PIX_FMT_GBRAP10LE: case AV_PIX_FMT_GBRAP10BE: case AV_PIX_FMT_GBRAP12LE: case AV_PIX_FMT_GBRAP12BE: case AV_PIX_FMT_GBRAP16LE: case AV_PIX_FMT_GBRAP16BE: case AV_PIX_FMT_GBRP: rgba_map[GREEN] = 0; rgba_map[BLUE ] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break; default: /* unsupported */ return AVERROR(EINVAL); } return 0; } int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4], enum AVPixelFormat pix_fmt, uint8_t rgba_color[4], int *is_packed_rgba, uint8_t rgba_map_ptr[4]) { uint8_t rgba_map[4] = {0}; int i; const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(pix_fmt); int hsub; av_assert0(pix_desc); hsub = pix_desc->log2_chroma_w; *is_packed_rgba = ff_fill_rgba_map(rgba_map, pix_fmt) >= 0; if (*is_packed_rgba) { pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3; for (i = 0; i < 4; i++) dst_color[rgba_map[i]] = rgba_color[i]; line[0] = av_malloc_array(w, pixel_step[0]); if (!line[0]) return AVERROR(ENOMEM); for (i = 0; i < w; i++) memcpy(line[0] + i * pixel_step[0], dst_color, pixel_step[0]); if (rgba_map_ptr) memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4); } else { int plane; dst_color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]); dst_color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0); dst_color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0); dst_color[3] = rgba_color[3]; for (plane = 0; plane < 4; plane++) { int line_size; int hsub1 = (plane == 1 || plane == 2) ? hsub : 0; pixel_step[plane] = 1; line_size = AV_CEIL_RSHIFT(w, hsub1) * pixel_step[plane]; line[plane] = av_malloc(line_size); if (!line[plane]) { while(plane && line[plane-1]) av_freep(&line[--plane]); return AVERROR(ENOMEM); } memset(line[plane], dst_color[plane], line_size); } } return 0; } void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4], uint8_t *src[4], int pixelstep[4], int hsub, int vsub, int x, int y, int w, int h) { int i, plane; uint8_t *p; for (plane = 0; plane < 4 && dst[plane]; plane++) { int hsub1 = plane == 1 || plane == 2 ? hsub : 0; int vsub1 = plane == 1 || plane == 2 ? vsub : 0; int width = AV_CEIL_RSHIFT(w, hsub1); int height = AV_CEIL_RSHIFT(h, vsub1); p = dst[plane] + (y >> vsub1) * dst_linesize[plane]; for (i = 0; i < height; i++) { memcpy(p + (x >> hsub1) * pixelstep[plane], src[plane], width * pixelstep[plane]); p += dst_linesize[plane]; } } } void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4], uint8_t *src[4], int src_linesize[4], int pixelstep[4], int hsub, int vsub, int x, int y, int y2, int w, int h) { int i, plane; uint8_t *p; for (plane = 0; plane < 4 && dst[plane]; plane++) { int hsub1 = plane == 1 || plane == 2 ? hsub : 0; int vsub1 = plane == 1 || plane == 2 ? vsub : 0; int width = AV_CEIL_RSHIFT(w, hsub1); int height = AV_CEIL_RSHIFT(h, vsub1); p = dst[plane] + (y >> vsub1) * dst_linesize[plane]; for (i = 0; i < height; i++) { memcpy(p + (x >> hsub1) * pixelstep[plane], src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), width * pixelstep[plane]); p += dst_linesize[plane]; } } } int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format); const AVComponentDescriptor *c; unsigned i, nb_planes = 0; int pixelstep[MAX_PLANES] = { 0 }; int full_range = 0; if (!desc || !desc->name) return AVERROR(EINVAL); if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | FF_PSEUDOPAL | AV_PIX_FMT_FLAG_ALPHA)) return AVERROR(ENOSYS); if (format == AV_PIX_FMT_P010LE || format == AV_PIX_FMT_P010BE || format == AV_PIX_FMT_P016LE || format == AV_PIX_FMT_P016BE) return AVERROR(ENOSYS); if (format == AV_PIX_FMT_YUVJ420P || format == AV_PIX_FMT_YUVJ422P || format == AV_PIX_FMT_YUVJ444P || format == AV_PIX_FMT_YUVJ411P || format == AV_PIX_FMT_YUVJ440P) full_range = 1; for (i = 0; i < desc->nb_components; i++) { c = &desc->comp[i]; /* for now, only 8-16 bits formats */ if (c->depth < 8 || c->depth > 16) return AVERROR(ENOSYS); if (desc->flags & AV_PIX_FMT_FLAG_BE) return AVERROR(ENOSYS); if (c->plane >= MAX_PLANES) return AVERROR(ENOSYS); /* strange interleaving */ if (pixelstep[c->plane] != 0 && pixelstep[c->plane] != c->step) return AVERROR(ENOSYS); if (pixelstep[c->plane] == 6 && c->depth == 16) return AVERROR(ENOSYS); pixelstep[c->plane] = c->step; if (pixelstep[c->plane] >= 8) return AVERROR(ENOSYS); nb_planes = FFMAX(nb_planes, c->plane + 1); } memset(draw, 0, sizeof(*draw)); draw->desc = desc; draw->format = format; draw->nb_planes = nb_planes; draw->flags = flags; draw->full_range = full_range; memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep)); draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w; draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h; for (i = 0; i < (desc->nb_components - !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(flags & FF_DRAW_PROCESS_ALPHA))); i++) draw->comp_mask[desc->comp[i].plane] |= 1 << desc->comp[i].offset; return 0; } void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4]) { unsigned i; uint8_t rgba_map[4]; if (rgba != color->rgba) memcpy(color->rgba, rgba, sizeof(color->rgba)); if ((draw->desc->flags & AV_PIX_FMT_FLAG_RGB) && ff_fill_rgba_map(rgba_map, draw->format) >= 0) { if (draw->nb_planes == 1) { for (i = 0; i < 4; i++) { color->comp[0].u8[rgba_map[i]] = rgba[i]; if (draw->desc->comp[rgba_map[i]].depth > 8) { color->comp[0].u16[rgba_map[i]] = color->comp[0].u8[rgba_map[i]] << 8; } } } else { for (i = 0; i < 4; i++) { color->comp[rgba_map[i]].u8[0] = rgba[i]; if (draw->desc->comp[rgba_map[i]].depth > 8) color->comp[rgba_map[i]].u16[0] = color->comp[rgba_map[i]].u8[0] << (draw->desc->comp[rgba_map[i]].depth - 8); } } } else if (draw->nb_planes >= 2) { /* assume YUV */ const AVPixFmtDescriptor *desc = draw->desc; color->comp[desc->comp[0].plane].u8[desc->comp[0].offset] = draw->full_range ? RGB_TO_Y_JPEG(rgba[0], rgba[1], rgba[2]) : RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); color->comp[desc->comp[1].plane].u8[desc->comp[1].offset] = draw->full_range ? RGB_TO_U_JPEG(rgba[0], rgba[1], rgba[2]) : RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0); color->comp[desc->comp[2].plane].u8[desc->comp[2].offset] = draw->full_range ? RGB_TO_V_JPEG(rgba[0], rgba[1], rgba[2]) : RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0); color->comp[3].u8[0] = rgba[3]; #define EXPAND(compn) \ if (desc->comp[compn].depth > 8) \ color->comp[desc->comp[compn].plane].u16[desc->comp[compn].offset] = \ color->comp[desc->comp[compn].plane].u8[desc->comp[compn].offset] << \ (draw->desc->comp[compn].depth + draw->desc->comp[compn].shift - 8) EXPAND(3); EXPAND(2); EXPAND(1); EXPAND(0); } else if (draw->format == AV_PIX_FMT_GRAY8 || draw->format == AV_PIX_FMT_GRAY8A || draw->format == AV_PIX_FMT_GRAY16LE || draw->format == AV_PIX_FMT_YA16LE || draw->format == AV_PIX_FMT_GRAY9LE || draw->format == AV_PIX_FMT_GRAY10LE || draw->format == AV_PIX_FMT_GRAY12LE || draw->format == AV_PIX_FMT_GRAY14LE) { const AVPixFmtDescriptor *desc = draw->desc; color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); EXPAND(0); color->comp[1].u8[0] = rgba[3]; EXPAND(1); } else { av_log(NULL, AV_LOG_WARNING, "Color conversion not implemented for %s\n", draw->desc->name); memset(color, 128, sizeof(*color)); } } static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[], int plane, int x, int y) { return data[plane] + (y >> draw->vsub[plane]) * linesize[plane] + (x >> draw->hsub[plane]) * draw->pixelstep[plane]; } void ff_copy_rectangle2(FFDrawContext *draw, uint8_t *dst[], int dst_linesize[], uint8_t *src[], int src_linesize[], int dst_x, int dst_y, int src_x, int src_y, int w, int h) { int plane, y, wp, hp; uint8_t *p, *q; for (plane = 0; plane < draw->nb_planes; plane++) { p = pointer_at(draw, src, src_linesize, plane, src_x, src_y); q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y); wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]) * draw->pixelstep[plane]; hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]); for (y = 0; y < hp; y++) { memcpy(q, p, wp); p += src_linesize[plane]; q += dst_linesize[plane]; } } } void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_x, int dst_y, int w, int h) { int plane, x, y, wp, hp; uint8_t *p0, *p; FFDrawColor color_tmp = *color; for (plane = 0; plane < draw->nb_planes; plane++) { p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y); wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]); hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]); if (!hp) return; p = p0; if (HAVE_BIGENDIAN && draw->desc->comp[0].depth > 8) { for (x = 0; 2*x < draw->pixelstep[plane]; x++) color_tmp.comp[plane].u16[x] = av_bswap16(color_tmp.comp[plane].u16[x]); } /* copy first line from color */ for (x = 0; x < wp; x++) { memcpy(p, color_tmp.comp[plane].u8, draw->pixelstep[plane]); p += draw->pixelstep[plane]; } wp *= draw->pixelstep[plane]; /* copy next lines from first line */ p = p0 + dst_linesize[plane]; for (y = 1; y < hp; y++) { memcpy(p, p0, wp); p += dst_linesize[plane]; } } } /** * Clip interval [x; x+w[ within [0; wmax[. * The resulting w may be negative if the final interval is empty. * dx, if not null, return the difference between in and out value of x. */ static void clip_interval(int wmax, int *x, int *w, int *dx) { if (dx) *dx = 0; if (*x < 0) { if (dx) *dx = -*x; *w += *x; *x = 0; } if (*x + *w > wmax) *w = wmax - *x; } /** * Decompose w pixels starting at x * into start + (w starting at x) + end * with x and w aligned on multiples of 1<>= sub; } static int component_used(FFDrawContext *draw, int plane, int comp) { return (draw->comp_mask[plane] >> comp) & 1; } /* If alpha is in the [ 0 ; 0x1010101 ] range, then alpha * value is in the [ 0 ; 0xFFFFFFFF ] range, and >> 24 gives a correct rounding. */ static void blend_line(uint8_t *dst, unsigned src, unsigned alpha, int dx, int w, unsigned hsub, int left, int right) { unsigned asrc = alpha * src; unsigned tau = 0x1010101 - alpha; int x; if (left) { unsigned suba = (left * alpha) >> hsub; *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24; dst += dx; } for (x = 0; x < w; x++) { *dst = (*dst * tau + asrc) >> 24; dst += dx; } if (right) { unsigned suba = (right * alpha) >> hsub; *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24; } } static void blend_line16(uint8_t *dst, unsigned src, unsigned alpha, int dx, int w, unsigned hsub, int left, int right) { unsigned asrc = alpha * src; unsigned tau = 0x10001 - alpha; int x; if (left) { unsigned suba = (left * alpha) >> hsub; uint16_t value = AV_RL16(dst); AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16); dst += dx; } for (x = 0; x < w; x++) { uint16_t value = AV_RL16(dst); AV_WL16(dst, (value * tau + asrc) >> 16); dst += dx; } if (right) { unsigned suba = (right * alpha) >> hsub; uint16_t value = AV_RL16(dst); AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16); } } void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h, int x0, int y0, int w, int h) { unsigned alpha, nb_planes, nb_comp, plane, comp; int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y; uint8_t *p0, *p; /* TODO optimize if alpha = 0xFF */ clip_interval(dst_w, &x0, &w, NULL); clip_interval(dst_h, &y0, &h, NULL); if (w <= 0 || h <= 0 || !color->rgba[3]) return; if (draw->desc->comp[0].depth <= 8) { /* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */ alpha = 0x10203 * color->rgba[3] + 0x2; } else { /* 0x101 * alpha is in the [ 2 ; 0x1001] range */ alpha = 0x101 * color->rgba[3] + 0x2; } nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA)); nb_planes += !nb_planes; for (plane = 0; plane < nb_planes; plane++) { nb_comp = draw->pixelstep[plane]; p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0); w_sub = w; h_sub = h; x_sub = x0; y_sub = y0; subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right); subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom); for (comp = 0; comp < nb_comp; comp++) { const int depth = draw->desc->comp[comp].depth; if (!component_used(draw, plane, comp)) continue; p = p0 + comp; if (top) { if (depth <= 8) { blend_line(p, color->comp[plane].u8[comp], alpha >> 1, draw->pixelstep[plane], w_sub, draw->hsub[plane], left, right); } else { blend_line16(p, color->comp[plane].u16[comp], alpha >> 1, draw->pixelstep[plane], w_sub, draw->hsub[plane], left, right); } p += dst_linesize[plane]; } if (depth <= 8) { for (y = 0; y < h_sub; y++) { blend_line(p, color->comp[plane].u8[comp], alpha, draw->pixelstep[plane], w_sub, draw->hsub[plane], left, right); p += dst_linesize[plane]; } } else { for (y = 0; y < h_sub; y++) { blend_line16(p, color->comp[plane].u16[comp], alpha, draw->pixelstep[plane], w_sub, draw->hsub[plane], left, right); p += dst_linesize[plane]; } } if (bottom) { if (depth <= 8) { blend_line(p, color->comp[plane].u8[comp], alpha >> 1, draw->pixelstep[plane], w_sub, draw->hsub[plane], left, right); } else { blend_line16(p, color->comp[plane].u16[comp], alpha >> 1, draw->pixelstep[plane], w_sub, draw->hsub[plane], left, right); } } } } } static void blend_pixel16(uint8_t *dst, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, unsigned w, unsigned h, unsigned shift, unsigned xm0) { unsigned xm, x, y, t = 0; unsigned xmshf = 3 - l2depth; unsigned xmmod = 7 >> l2depth; unsigned mbits = (1 << (1 << l2depth)) - 1; unsigned mmult = 255 / mbits; uint16_t value = AV_RL16(dst); for (y = 0; y < h; y++) { xm = xm0; for (x = 0; x < w; x++) { t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits) * mmult; xm++; } mask += mask_linesize; } alpha = (t >> shift) * alpha; AV_WL16(dst, ((0x10001 - alpha) * value + alpha * src) >> 16); } static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, unsigned w, unsigned h, unsigned shift, unsigned xm0) { unsigned xm, x, y, t = 0; unsigned xmshf = 3 - l2depth; unsigned xmmod = 7 >> l2depth; unsigned mbits = (1 << (1 << l2depth)) - 1; unsigned mmult = 255 / mbits; for (y = 0; y < h; y++) { xm = xm0; for (x = 0; x < w; x++) { t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits) * mmult; xm++; } mask += mask_linesize; } alpha = (t >> shift) * alpha; *dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24; } static void blend_line_hv16(uint8_t *dst, int dst_delta, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, int w, unsigned hsub, unsigned vsub, int xm, int left, int right, int hband) { int x; if (left) { blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth, left, hband, hsub + vsub, xm); dst += dst_delta; xm += left; } for (x = 0; x < w; x++) { blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth, 1 << hsub, hband, hsub + vsub, xm); dst += dst_delta; xm += 1 << hsub; } if (right) blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth, right, hband, hsub + vsub, xm); } static void blend_line_hv(uint8_t *dst, int dst_delta, unsigned src, unsigned alpha, const uint8_t *mask, int mask_linesize, int l2depth, int w, unsigned hsub, unsigned vsub, int xm, int left, int right, int hband) { int x; if (left) { blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth, left, hband, hsub + vsub, xm); dst += dst_delta; xm += left; } for (x = 0; x < w; x++) { blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth, 1 << hsub, hband, hsub + vsub, xm); dst += dst_delta; xm += 1 << hsub; } if (right) blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth, right, hband, hsub + vsub, xm); } void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h, const uint8_t *mask, int mask_linesize, int mask_w, int mask_h, int l2depth, unsigned endianness, int x0, int y0) { unsigned alpha, nb_planes, nb_comp, plane, comp; int xm0, ym0, w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y; uint8_t *p0, *p; const uint8_t *m; clip_interval(dst_w, &x0, &mask_w, &xm0); clip_interval(dst_h, &y0, &mask_h, &ym0); mask += ym0 * mask_linesize; if (mask_w <= 0 || mask_h <= 0 || !color->rgba[3]) return; if (draw->desc->comp[0].depth <= 8) { /* alpha is in the [ 0 ; 0x10203 ] range, alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */ alpha = (0x10307 * color->rgba[3] + 0x3) >> 8; } else { alpha = (0x101 * color->rgba[3] + 0x2) >> 8; } nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA)); nb_planes += !nb_planes; for (plane = 0; plane < nb_planes; plane++) { nb_comp = draw->pixelstep[plane]; p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0); w_sub = mask_w; h_sub = mask_h; x_sub = x0; y_sub = y0; subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right); subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom); for (comp = 0; comp < nb_comp; comp++) { const int depth = draw->desc->comp[comp].depth; if (!component_used(draw, plane, comp)) continue; p = p0 + comp; m = mask; if (top) { if (depth <= 8) { blend_line_hv(p, draw->pixelstep[plane], color->comp[plane].u8[comp], alpha, m, mask_linesize, l2depth, w_sub, draw->hsub[plane], draw->vsub[plane], xm0, left, right, top); } else { blend_line_hv16(p, draw->pixelstep[plane], color->comp[plane].u16[comp], alpha, m, mask_linesize, l2depth, w_sub, draw->hsub[plane], draw->vsub[plane], xm0, left, right, top); } p += dst_linesize[plane]; m += top * mask_linesize; } if (depth <= 8) { for (y = 0; y < h_sub; y++) { blend_line_hv(p, draw->pixelstep[plane], color->comp[plane].u8[comp], alpha, m, mask_linesize, l2depth, w_sub, draw->hsub[plane], draw->vsub[plane], xm0, left, right, 1 << draw->vsub[plane]); p += dst_linesize[plane]; m += mask_linesize << draw->vsub[plane]; } } else { for (y = 0; y < h_sub; y++) { blend_line_hv16(p, draw->pixelstep[plane], color->comp[plane].u16[comp], alpha, m, mask_linesize, l2depth, w_sub, draw->hsub[plane], draw->vsub[plane], xm0, left, right, 1 << draw->vsub[plane]); p += dst_linesize[plane]; m += mask_linesize << draw->vsub[plane]; } } if (bottom) { if (depth <= 8) { blend_line_hv(p, draw->pixelstep[plane], color->comp[plane].u8[comp], alpha, m, mask_linesize, l2depth, w_sub, draw->hsub[plane], draw->vsub[plane], xm0, left, right, bottom); } else { blend_line_hv16(p, draw->pixelstep[plane], color->comp[plane].u16[comp], alpha, m, mask_linesize, l2depth, w_sub, draw->hsub[plane], draw->vsub[plane], xm0, left, right, bottom); } } } } } int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir, int value) { unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max; if (!shift) return value; if (round_dir >= 0) value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1); return (value >> shift) << shift; } AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags) { enum AVPixelFormat i; FFDrawContext draw; AVFilterFormats *fmts = NULL; int ret; for (i = 0; av_pix_fmt_desc_get(i); i++) if (ff_draw_init(&draw, i, flags) >= 0 && (ret = ff_add_format(&fmts, i)) < 0) return NULL; return fmts; }