/* * 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/csp.h" #include "libavutil/intreadwrite.h" #include "libavutil/pixdesc.h" #include "colorspace.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) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); if (!(desc->flags & AV_PIX_FMT_FLAG_RGB)) return AVERROR(EINVAL); if (desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) return AVERROR(EINVAL); av_assert0(desc->nb_components == 3 + !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA)); if (desc->flags & AV_PIX_FMT_FLAG_PLANAR) { rgba_map[RED] = desc->comp[0].plane; rgba_map[GREEN] = desc->comp[1].plane; rgba_map[BLUE] = desc->comp[2].plane; rgba_map[ALPHA] = (desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? desc->comp[3].plane : 3; } else { int had0 = 0; unsigned depthb = 0; unsigned i; for (i = 0; i < desc->nb_components; i++) { /* all components must have same depth in bytes */ unsigned db = (desc->comp[i].depth + 7) / 8; unsigned pos = desc->comp[i].offset / db; if (depthb && (depthb != db)) return AVERROR(ENOSYS); if (desc->comp[i].offset % db) return AVERROR(ENOSYS); had0 |= pos == 0; rgba_map[i] = pos; depthb = db; } if (desc->nb_components == 3) rgba_map[ALPHA] = had0 ? 3 : 0; } av_assert0(rgba_map[RED] != rgba_map[GREEN]); av_assert0(rgba_map[GREEN] != rgba_map[BLUE]); av_assert0(rgba_map[BLUE] != rgba_map[RED]); av_assert0(rgba_map[RED] != rgba_map[ALPHA]); av_assert0(rgba_map[GREEN] != rgba_map[ALPHA]); av_assert0(rgba_map[BLUE] != rgba_map[ALPHA]); return 0; } int ff_draw_init2(FFDrawContext *draw, enum AVPixelFormat format, enum AVColorSpace csp, enum AVColorRange range, unsigned flags) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format); const AVLumaCoefficients *luma = NULL; const AVComponentDescriptor *c; unsigned i, nb_planes = 0; int pixelstep[MAX_PLANES] = { 0 }; int depthb = 0; if (!desc || !desc->name) return AVERROR(EINVAL); if (desc->flags & AV_PIX_FMT_FLAG_BE) return AVERROR(ENOSYS); if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | AV_PIX_FMT_FLAG_ALPHA)) return AVERROR(ENOSYS); if (csp == AVCOL_SPC_UNSPECIFIED) csp = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? AVCOL_SPC_RGB : AVCOL_SPC_SMPTE170M; if (!(desc->flags & AV_PIX_FMT_FLAG_RGB) && !(luma = av_csp_luma_coeffs_from_avcsp(csp))) return AVERROR(EINVAL); if (range == AVCOL_RANGE_UNSPECIFIED) range = (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 || csp == AVCOL_SPC_RGB) ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG; if (range != AVCOL_RANGE_JPEG && range != AVCOL_RANGE_MPEG) return AVERROR(EINVAL); for (i = 0; i < desc->nb_components; i++) { int db; c = &desc->comp[i]; /* for now, only 8-16 bits formats */ if (c->depth < 8 || c->depth > 16) return AVERROR(ENOSYS); if (c->plane >= MAX_PLANES) return AVERROR(ENOSYS); /* data must either be in the high or low bits, never middle */ if (c->shift && ((c->shift + c->depth) & 0x7)) return AVERROR(ENOSYS); /* mixed >8 and <=8 depth */ db = (c->depth + 7) / 8; if (depthb && (depthb != db)) return AVERROR(ENOSYS); depthb = db; if (db * (c->offset + 1) > 16) return AVERROR(ENOSYS); if (c->offset % db) return AVERROR(ENOSYS); /* strange interleaving */ if (pixelstep[c->plane] != 0 && pixelstep[c->plane] != c->step) 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->range = range; draw->csp = csp; draw->flags = flags; if (luma) ff_fill_rgb2yuv_table(luma, draw->rgb2yuv); 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; return 0; } int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags) { return ff_draw_init2(draw, format, AVCOL_SPC_UNSPECIFIED, AVCOL_RANGE_UNSPECIFIED, flags); } void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4]) { unsigned i; double yuvad[4]; double rgbad[4]; const AVPixFmtDescriptor *desc = draw->desc; if (rgba != color->rgba) memcpy(color->rgba, rgba, sizeof(color->rgba)); memset(color->comp, 0, sizeof(color->comp)); for (int i = 0; i < 4; i++) rgbad[i] = color->rgba[i] / 255.; if (draw->desc->flags & AV_PIX_FMT_FLAG_RGB) memcpy(yuvad, rgbad, sizeof(double) * 3); else ff_matrix_mul_3x3_vec(yuvad, rgbad, draw->rgb2yuv); yuvad[3] = rgbad[3]; for (int i = 0; i < 3; i++) { int chroma = (!(draw->desc->flags & AV_PIX_FMT_FLAG_RGB) && i > 0); if (draw->range == AVCOL_RANGE_MPEG) { yuvad[i] *= (chroma ? 224. : 219.) / 255.; yuvad[i] += (chroma ? 128. : 16.) / 255.; } else if (chroma) { yuvad[i] += 0.5; } } // Ensure we place the alpha appropriately for gray formats if (desc->nb_components <= 2) yuvad[1] = yuvad[3]; for (i = 0; i < desc->nb_components; i++) { unsigned val = yuvad[i] * ((1 << (draw->desc->comp[i].depth + draw->desc->comp[i].shift)) - 1) + 0.5; if (desc->comp[i].depth > 8) color->comp[desc->comp[i].plane].u16[desc->comp[i].offset / 2] = val; else color->comp[desc->comp[i].plane].u8[desc->comp[i].offset] = val; } } 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; } /* 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; nb_comp = draw->desc->nb_components - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA)); /* 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++) { 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; const int offset = draw->desc->comp[comp].offset; const int index = offset / ((depth + 7) / 8); if (draw->desc->comp[comp].plane != plane) continue; p = p0 + offset; if (top) { if (depth <= 8) { blend_line(p, color->comp[plane].u8[index], alpha >> 1, draw->pixelstep[plane], w_sub, draw->hsub[plane], left, right); } else { blend_line16(p, color->comp[plane].u16[index], 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[index], 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[index], 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[index], alpha >> 1, draw->pixelstep[plane], w_sub, draw->hsub[plane], left, right); } else { blend_line16(p, color->comp[plane].u16[index], 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; nb_comp = draw->desc->nb_components - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA)); 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++) { 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; const int offset = draw->desc->comp[comp].offset; const int index = offset / ((depth + 7) / 8); if (draw->desc->comp[comp].plane != plane) continue; p = p0 + offset; m = mask; if (top) { if (depth <= 8) { blend_line_hv(p, draw->pixelstep[plane], color->comp[plane].u8[index], 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[index], 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[index], 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[index], 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[index], 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[index], 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; }