lavfi: add drawutils

Add drawutils.h and drawutils.c, and use them in the pad filter.
The new functions are going to be shared by other filters.

Signed-off-by: Mans Rullgard <mans@mansr.com>

1 files changed, 21 insertions, 105 deletions

diff --git a/libavfilter/vf_pad.c b/libavfilter/vf_pad.c
index 7413071913..30ec5ba6e9 100644
--- a/libavfilter/vf_pad.c
+++ b/libavfilter/vf_pad.c
@@ -30,94 +30,7 @@
 #include "libavutil/avassert.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/parseutils.h"
-
-enum { RED = 0, GREEN, BLUE, ALPHA };
-
-static int fill_line_with_color(uint8_t *line[4], int line_step[4], int w, uint8_t color[4],
-                                enum PixelFormat pix_fmt, uint8_t rgba_color[4], int *is_packed_rgba)
-{
-    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_ARGB:  rgba_map[ALPHA] = 0; rgba_map[RED  ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
-    case PIX_FMT_ABGR:  rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED  ] = 3; break;
-    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_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED  ] = 2; rgba_map[ALPHA] = 3; break;
-    default:
-        *is_packed_rgba = 0;
-    }
-
-    if (*is_packed_rgba) {
-        line_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;
-        for (i = 0; i < 4; i++)
-            color[rgba_map[i]] = rgba_color[i];
-
-        line[0] = av_malloc(w * line_step[0]);
-        for (i = 0; i < w; i++)
-            memcpy(line[0] + i * line_step[0], color, line_step[0]);
-    } else {
-        int plane;
-
-        color[RED  ] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
-        color[GREEN] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
-        color[BLUE ] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
-        color[ALPHA] = rgba_color[3];
-
-        for (plane = 0; plane < 4; plane++) {
-            int line_size;
-            int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;
-
-            line_step[plane] = 1;
-            line_size = (w >> hsub1) * line_step[plane];
-            line[plane] = av_malloc(line_size);
-            memset(line[plane], color[plane], line_size);
-        }
-    }
-
-    return 0;
-}
-
-static void draw_rectangle(AVFilterBufferRef *outpic, uint8_t *line[4], int line_step[4],
-                           int hsub, int vsub, int x, int y, int w, int h)
-{
-    int i, plane;
-    uint8_t *p;
-
-    for (plane = 0; plane < 4 && outpic->data[plane]; plane++) {
-        int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
-        int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
-
-        p = outpic->data[plane] + (y >> vsub1) * outpic->linesize[plane];
-        for (i = 0; i < (h >> vsub1); i++) {
-            memcpy(p + (x >> hsub1) * line_step[plane], line[plane], (w >> hsub1) * line_step[plane]);
-            p += outpic->linesize[plane];
-        }
-    }
-}
-
-static void copy_rectangle(AVFilterBufferRef *outpic,uint8_t *line[4], int line_step[4], int linesize[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 && outpic->data[plane]; plane++) {
-        int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
-        int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
-
-        p = outpic->data[plane] + (y >> vsub1) * outpic->linesize[plane];
-        for (i = 0; i < (h >> vsub1); i++) {
-            memcpy(p + (x >> hsub1) * line_step[plane], line[plane] + linesize[plane]*(i+(y2>>vsub1)), (w >> hsub1) * line_step[plane]);
-            p += outpic->linesize[plane];
-        }
-    }
-}
+#include "drawutils.h"
 
 static int query_formats(AVFilterContext *ctx)
 {
@@ -210,8 +123,8 @@ static int config_input(AVFilterLink *inlink)
     pad->in_h = inlink->h & ~((1 << pad->vsub) - 1);
 
     memcpy(rgba_color, pad->color, sizeof(rgba_color));
-    fill_line_with_color(pad->line, pad->line_step, pad->w, pad->color,
-                         inlink->format, rgba_color, &is_packed_rgba);
+    ff_fill_line_with_color(pad->line, pad->line_step, pad->w, pad->color,
+                            inlink->format, rgba_color, &is_packed_rgba, NULL);
 
     av_log(ctx, AV_LOG_INFO, "w:%d h:%d -> w:%d h:%d x:%d y:%d color:0x%02X%02X%02X%02X[%s]\n",
            inlink->w, inlink->h, pad->w, pad->h, pad->x, pad->y,
@@ -351,9 +264,10 @@ static void draw_send_bar_slice(AVFilterLink *link, int y, int h, int slice_dir,
     }
 
     if (bar_h) {
-        draw_rectangle(link->dst->outputs[0]->out_buf,
-                       pad->line, pad->line_step, pad->hsub, pad->vsub,
-                       0, bar_y, pad->w, bar_h);
+        ff_draw_rectangle(link->dst->outputs[0]->out_buf->data,
+                          link->dst->outputs[0]->out_buf->linesize,
+                          pad->line, pad->line_step, pad->hsub, pad->vsub,
+                          0, bar_y, pad->w, bar_h);
         avfilter_draw_slice(link->dst->outputs[0], bar_y, bar_h, slice_dir);
     }
 }
@@ -374,18 +288,20 @@ static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
     draw_send_bar_slice(link, y, h, slice_dir, 1);
 
     /* left border */
-    draw_rectangle(outpic, pad->line, pad->line_step, pad->hsub, pad->vsub,
-                   0, y, pad->x, h);
+    ff_draw_rectangle(outpic->data, outpic->linesize, pad->line, pad->line_step,
+                      pad->hsub, pad->vsub, 0, y, pad->x, h);
 
     if(pad->needs_copy){
-        copy_rectangle(outpic,
-                       inpic->data, pad->line_step, inpic->linesize, pad->hsub, pad->vsub,
-                       pad->x, y, y-pad->y, inpic->video->w, h);
+        ff_copy_rectangle(outpic->data, outpic->linesize,
+                          inpic->data, inpic->linesize, pad->line_step,
+                          pad->hsub, pad->vsub,
+                          pad->x, y, y-pad->y, inpic->video->w, h);
     }
 
     /* right border */
-    draw_rectangle(outpic, pad->line, pad->line_step, pad->hsub, pad->vsub,
-                   pad->x + pad->in_w, y, pad->w - pad->x - pad->in_w, h);
+    ff_draw_rectangle(outpic->data, outpic->linesize,
+                      pad->line, pad->line_step, pad->hsub, pad->vsub,
+                      pad->x + pad->in_w, y, pad->w - pad->x - pad->in_w, h);
     avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
 
     draw_send_bar_slice(link, y, h, slice_dir, -1);
@@ -488,8 +404,8 @@ static int color_config_props(AVFilterLink *inlink)
         return AVERROR(EINVAL);
 
     memcpy(rgba_color, color->color, sizeof(rgba_color));
-    fill_line_with_color(color->line, color->line_step, color->w, color->color,
-                         inlink->format, rgba_color, &is_packed_rgba);
+    ff_fill_line_with_color(color->line, color->line_step, color->w, color->color,
+                            inlink->format, rgba_color, &is_packed_rgba, NULL);
 
     av_log(ctx, AV_LOG_INFO, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x[%s]\n",
            color->w, color->h, color->time_base.den, color->time_base.num,
@@ -510,9 +426,9 @@ static int color_request_frame(AVFilterLink *link)
     picref->pos                 = 0;
 
     avfilter_start_frame(link, avfilter_ref_buffer(picref, ~0));
-    draw_rectangle(picref,
-                   color->line, color->line_step, color->hsub, color->vsub,
-                   0, 0, color->w, color->h);
+    ff_draw_rectangle(picref->data, picref->linesize,
+                      color->line, color->line_step, color->hsub, color->vsub,
+                      0, 0, color->w, color->h);
     avfilter_draw_slice(link, 0, color->h, 1);
     avfilter_end_frame(link);
     avfilter_unref_buffer(picref);