int ff_fill_rgba_map(uint8_t *rgba_map, enum PixelFormat pix_fmt)
{
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: /* unsupported */
return AVERROR(EINVAL);
}
}
}
+
+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, 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 avfilter_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
projects / ffmpeg / blobdiff