/* * Copyright 2011 Stefano Sabatini <stefano.sabatini-lala poste it> * Copyright 2012 Nicolas George <nicolas.george normalesup org> * * 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 <string.h> #include "libavutil/avutil.h"#include "libavutil/colorspace.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_GBRAP:    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 = 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(w * pixel_step[0]);        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 = FF_CEIL_RSHIFT(w, hsub1) * pixel_step[plane];            line[plane] = av_malloc(line_size);            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  = FF_CEIL_RSHIFT(w, hsub1);        int height = FF_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  = FF_CEIL_RSHIFT(w, hsub1);        int height = FF_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 };     if (!desc->name)        return AVERROR(EINVAL);    if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | AV_PIX_FMT_FLAG_PSEUDOPAL | AV_PIX_FMT_FLAG_ALPHA))        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));    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 & 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];        } else {            for (i = 0; i < 4; i++)                color->comp[rgba_map[i]].u8[0] = 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 == AV_PIX_FMT_GRAY8 || draw->format == AV_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 = FF_CEIL_RSHIFT(w, draw->hsub[plane]) * draw->pixelstep[plane];        hp = FF_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;     for (plane = 0; plane < draw->nb_planes; plane++) {        p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);        wp = FF_CEIL_RSHIFT(w, draw->hsub[plane]);        hp = FF_CEIL_RSHIFT(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;     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],

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