diff options
Diffstat (limited to 'libavfilter/drawutils.c')
| -rw-r--r-- | libavfilter/drawutils.c | 463 |
1 files changed, 448 insertions, 15 deletions
diff --git a/libavfilter/drawutils.c b/libavfilter/drawutils.c index 6071024..08b2659 100644 --- a/libavfilter/drawutils.c +++ b/libavfilter/drawutils.c @@ -1,18 +1,21 @@ /* - * This file is part of Libav. + * Copyright 2011 Stefano Sabatini <stefano.sabatini-lala poste it> + * Copyright 2012 Nicolas George <nicolas.george normalesup org> * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -23,29 +26,39 @@ #include "libavutil/mem.h" #include "libavutil/pixdesc.h" #include "drawutils.h" +#include "formats.h" enum { RED = 0, GREEN, BLUE, ALPHA }; -int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4], - enum PixelFormat pix_fmt, uint8_t rgba_color[4], - int *is_packed_rgba, uint8_t rgba_map_ptr[4]) +int ff_fill_rgba_map(uint8_t *rgba_map, enum PixelFormat pix_fmt) { - uint8_t rgba_map[4] = {0}; - int i; - const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[pix_fmt]; - int hsub = pix_desc->log2_chroma_w; - - *is_packed_rgba = 1; switch (pix_fmt) { + case PIX_FMT_0RGB: case PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break; + case PIX_FMT_0BGR: case PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break; + case PIX_FMT_RGB0: case PIX_FMT_RGBA: case PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break; case PIX_FMT_BGRA: + case PIX_FMT_BGR0: case PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break; - default: - *is_packed_rgba = 0; + 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 PixelFormat 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_descriptors[pix_fmt]; + int 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; @@ -118,3 +131,423 @@ void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4], } } } + +int ff_draw_init(FFDrawContext *draw, enum PixelFormat format, unsigned flags) +{ + const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[format]; + const AVComponentDescriptor *c; + unsigned i, nb_planes = 0; + int pixelstep[MAX_PLANES] = { 0 }; + + if (!desc->name) + return AVERROR(EINVAL); + if (desc->flags & ~(PIX_FMT_PLANAR | PIX_FMT_RGB | PIX_FMT_PSEUDOPAL)) + return AVERROR(ENOSYS); + for (i = 0; i < desc->nb_components; i++) { + c = &desc->comp[i]; + /* for now, only 8-bits formats */ + if (c->depth_minus1 != 8 - 1) + return AVERROR(ENOSYS); + if (c->plane >= MAX_PLANES) + return AVERROR(ENOSYS); + /* strange interleaving */ + if (pixelstep[c->plane] != 0 && + pixelstep[c->plane] != c->step_minus1 + 1) + return AVERROR(ENOSYS); + pixelstep[c->plane] = c->step_minus1 + 1; + if (pixelstep[c->plane] >= 8) + return AVERROR(ENOSYS); + nb_planes = FFMAX(nb_planes, c->plane + 1); + } + if ((desc->log2_chroma_w || desc->log2_chroma_h) && nb_planes < 3) + return AVERROR(ENOSYS); /* exclude NV12 and NV21 */ + memset(draw, 0, sizeof(*draw)); + draw->desc = desc; + draw->format = format; + draw->nb_planes = nb_planes; + memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep)); + if (nb_planes >= 3 && !(desc->flags & PIX_FMT_RGB)) { + 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 - 1) | 1); i++) + draw->comp_mask[desc->comp[i].plane] |= + 1 << (desc->comp[i].offset_plus1 - 1); + 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 & PIX_FMT_RGB) && draw->nb_planes == 1 && + ff_fill_rgba_map(rgba_map, draw->format) >= 0) { + for (i = 0; i < 4; i++) + color->comp[0].u8[rgba_map[i]] = rgba[i]; + } else if (draw->nb_planes == 3 || draw->nb_planes == 4) { + /* assume YUV */ + color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); + color->comp[1].u8[0] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0); + color->comp[2].u8[0] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0); + color->comp[3].u8[0] = rgba[3]; + } else if (draw->format == PIX_FMT_GRAY8 || draw->format == PIX_FMT_GRAY8A) { + color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); + color->comp[1].u8[0] = rgba[3]; + } 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 = (w >> draw->hsub[plane]) * draw->pixelstep[plane]; + hp = (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; + + for (plane = 0; plane < draw->nb_planes; plane++) { + p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y); + wp = (w >> draw->hsub[plane]); + hp = (h >> draw->vsub[plane]); + if (!hp) + return; + p = p0; + /* copy first line from color */ + for (x = 0; x < wp; x++) { + memcpy(p, color->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 void subsampling_bounds(int sub, int *x, int *w, int *start, int *end) +{ + int mask = (1 << sub) - 1; + + *start = (-*x) & mask; + *x += *start; + *start = FFMIN(*start, *w); + *w -= *start; + *end = *w & mask; + *w >>= 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; + + src *= alpha; + 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; + } +} + +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; + /* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */ + alpha = 0x10203 * color->rgba[3] + 0x2; + nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */ + 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++) { + if (!component_used(draw, plane, comp)) + continue; + p = p0 + comp; + if (top) { + blend_line(p, color->comp[plane].u8[comp], alpha >> 1, + draw->pixelstep[plane], w_sub, + draw->hsub[plane], left, right); + p += dst_linesize[plane]; + } + 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]; + } + if (bottom) + blend_line(p, color->comp[plane].u8[comp], alpha >> 1, + draw->pixelstep[plane], w_sub, + draw->hsub[plane], left, right); + } + } +} + +static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha, + 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_hv(uint8_t *dst, int dst_delta, + unsigned src, unsigned alpha, + 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, + 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, *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; + /* alpha is in the [ 0 ; 0x10203 ] range, + alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */ + alpha = (0x10307 * color->rgba[3] + 0x3) >> 8; + nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */ + 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++) { + if (!component_used(draw, plane, comp)) + continue; + p = p0 + comp; + m = mask; + if (top) { + 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); + p += dst_linesize[plane]; + m += top * mask_linesize; + } + 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]; + } + if (bottom) + 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); + } + } +} + +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 PixelFormat i, pix_fmts[PIX_FMT_NB + 1]; + unsigned n = 0; + FFDrawContext draw; + + for (i = 0; i < PIX_FMT_NB; i++) + if (ff_draw_init(&draw, i, flags) >= 0) + pix_fmts[n++] = i; + pix_fmts[n++] = PIX_FMT_NONE; + return ff_make_format_list(pix_fmts); +} + +#ifdef TEST + +#undef printf + +int main(void) +{ + enum PixelFormat f; + const AVPixFmtDescriptor *desc; + FFDrawContext draw; + FFDrawColor color; + int r, i; + + for (f = 0; f < PIX_FMT_NB; f++) { + desc = &av_pix_fmt_descriptors[f]; + if (!desc->name) + continue; + printf("Testing %s...%*s", desc->name, + (int)(16 - strlen(desc->name)), ""); + r = ff_draw_init(&draw, f, 0); + if (r < 0) { + char buf[128]; + av_strerror(r, buf, sizeof(buf)); + printf("no: %s\n", buf); + continue; + } + ff_draw_color(&draw, &color, (uint8_t[]) { 1, 0, 0, 1 }); + for (i = 0; i < sizeof(color); i++) + if (((uint8_t *)&color)[i] != 128) + break; + if (i == sizeof(color)) { + printf("fallback color\n"); + continue; + } + printf("ok\n"); + } + return 0; +} + +#endif |
