avfilter/vf_drawtext: use AVFilterContext for logging

libavfilter/vf_drawtext.c

@@ -1269,11 +1269,12 @@ static void update_alpha(DrawTextContext *s)
         s->alpha = 256 * alpha;
 }
 
-static int draw_glyphs(DrawTextContext *s, AVFrame *frame,
+static int draw_glyphs(AVFilterContext *ctx, AVFrame *frame,
                        FFDrawColor *color,
                        TextMetrics *metrics,
                        int x, int y, int borderw)
 {
+    DrawTextContext *s = ctx->priv;
     int g, l, x1, y1, w1, h1, idx;
     int dx = 0, dy = 0, pdx = 0;
     GlyphInfo *info;
@@ -1297,7 +1298,7 @@ static int draw_glyphs(DrawTextContext *s, AVFrame *frame,
 
     if ((!j_left || j_right) && !s->tab_warning_printed && s->tab_count > 0) {
         s->tab_warning_printed = 1;
-        av_log(s, AV_LOG_WARNING, "Tab characters are only supported with left horizontal alignment\n");
+        av_log(ctx, AV_LOG_WARNING, "Tab characters are only supported with left horizontal alignment\n");
     }
 
     clip_x = FFMIN(metrics->rect_x + s->box_width + s->bb_right, frame->width);
@@ -1510,7 +1511,7 @@ continue_on_failed2:
 
             cur_line->width64 = w64;
 
-            av_log(s, AV_LOG_DEBUG, "  Line: %d -- glyphs count: %d - width64: %d - offset_left64: %d - offset_right64: %d)\n",
+            av_log(ctx, AV_LOG_DEBUG, "  Line: %d -- glyphs count: %d - width64: %d - offset_left64: %d - offset_right64: %d)\n",
                 line_count, hb->glyph_count, cur_line->width64, cur_line->offset_left64, cur_line->offset_right64);
 
             if (w64 > width64) {
@@ -1613,7 +1614,7 @@ static int draw_text(AVFilterContext *ctx, AVFrame *frame)
             return ret;
         if (!av_bprint_is_complete(&s->expanded_fontcolor))
             return AVERROR(ENOMEM);
-        av_log(s, AV_LOG_DEBUG, "Evaluated fontcolor is '%s'\n", s->expanded_fontcolor.str);
+        av_log(ctx, AV_LOG_DEBUG, "Evaluated fontcolor is '%s'\n", s->expanded_fontcolor.str);
         ret = av_parse_color(s->fontcolor.rgba, s->expanded_fontcolor.str, -1, s);
         if (ret)
             return ret;
@@ -1797,20 +1798,20 @@ static int draw_text(AVFilterContext *ctx, AVFrame *frame)
         }
 
         if (s->shadowx || s->shadowy) {
-            if ((ret = draw_glyphs(s, frame, &shadowcolor, &metrics,
+            if ((ret = draw_glyphs(ctx, frame, &shadowcolor, &metrics,
                     s->shadowx, s->shadowy, s->borderw)) < 0) {
                 return ret;
             }
         }
 
         if (s->borderw) {
-            if ((ret = draw_glyphs(s, frame, &bordercolor, &metrics,
+            if ((ret = draw_glyphs(ctx, frame, &bordercolor, &metrics,
                     0, 0, s->borderw)) < 0) {
                 return ret;
             }
         }
 
-        if ((ret = draw_glyphs(s, frame, &fontcolor, &metrics, 0,
+        if ((ret = draw_glyphs(ctx, frame, &fontcolor, &metrics, 0,
                 0, 0)) < 0) {
             return ret;
         }
@@ -1846,7 +1847,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
             header = (AVDetectionBBoxHeader *)sd->data;
             loop = header->nb_bboxes;
         } else {
-            av_log(s, AV_LOG_WARNING, "No detection bboxes.\n");
+            av_log(ctx, AV_LOG_WARNING, "No detection bboxes.\n");
             return ff_filter_frame(outlink, frame);
         }
     }