avfilter: Constify all AVFilters

[ffmpeg] / libavfilter / vf_pad.c

diff --git a/libavfilter/vf_pad.c b/libavfilter/vf_pad.c
index ed155578e11f1ced0232f9076f8c58e923e8c935..871f2930afd0c422eb6c4fdfe2ccda1f5eb31eae 100644 (file)
--- a/libavfilter/vf_pad.c
+++ b/libavfilter/vf_pad.c
@@ -178,14 +178,14 @@ static int config_input(AVFilterLink *inlink)
     if (s->y < 0 || s->y + inlink->h > s->h)
         s->y = var_values[VAR_Y] = (s->h - inlink->h) / 2;
 
+    s->w    = ff_draw_round_to_sub(&s->draw, 0, -1, s->w);
+    s->h    = ff_draw_round_to_sub(&s->draw, 1, -1, s->h);
     /* sanity check params */
-    if (s->w < 0 || s->h < 0) {
-        av_log(ctx, AV_LOG_ERROR, "Negative values are not acceptable.\n");
+    if (s->w < inlink->w || s->h < inlink->h) {
+        av_log(ctx, AV_LOG_ERROR, "Padded dimensions cannot be smaller than input dimensions.\n");
         return AVERROR(EINVAL);
     }
 
-    s->w    = ff_draw_round_to_sub(&s->draw, 0, -1, s->w);
-    s->h    = ff_draw_round_to_sub(&s->draw, 1, -1, s->h);
     s->x    = ff_draw_round_to_sub(&s->draw, 0, -1, s->x);
     s->y    = ff_draw_round_to_sub(&s->draw, 1, -1, s->y);
     s->in_w = ff_draw_round_to_sub(&s->draw, 0, -1, inlink->w);
@@ -210,7 +210,7 @@ static int config_input(AVFilterLink *inlink)
     return 0;
 
 eval_fail:
-    av_log(NULL, AV_LOG_ERROR,
+    av_log(ctx, AV_LOG_ERROR,
            "Error when evaluating the expression '%s'\n", expr);
     return ret;
 
@@ -417,12 +417,12 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
 
 static const AVOption pad_options[] = {
-    { "width",  "set the pad area width expression",       OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, CHAR_MIN, CHAR_MAX, FLAGS },
-    { "w",      "set the pad area width expression",       OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, CHAR_MIN, CHAR_MAX, FLAGS },
-    { "height", "set the pad area height expression",      OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, CHAR_MIN, CHAR_MAX, FLAGS },
-    { "h",      "set the pad area height expression",      OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, CHAR_MIN, CHAR_MAX, FLAGS },
-    { "x",      "set the x offset expression for the input image position", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
-    { "y",      "set the y offset expression for the input image position", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
+    { "width",  "set the pad area width expression",       OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, 0, 0, FLAGS },
+    { "w",      "set the pad area width expression",       OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, 0, 0, FLAGS },
+    { "height", "set the pad area height expression",      OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, 0, 0, FLAGS },
+    { "h",      "set the pad area height expression",      OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, 0, 0, FLAGS },
+    { "x",      "set the x offset expression for the input image position", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS },
+    { "y",      "set the y offset expression for the input image position", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS },
     { "color",  "set the color of the padded area border", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str = "black"}, .flags = FLAGS },
     { "eval",   "specify when to evaluate expressions",    OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
          { "init",  "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT},  .flags = FLAGS, .unit = "eval" },
@@ -453,7 +453,7 @@ static const AVFilterPad avfilter_vf_pad_outputs[] = {
     { NULL }
 };
 
-AVFilter ff_vf_pad = {
+const AVFilter ff_vf_pad = {
     .name          = "pad",
     .description   = NULL_IF_CONFIG_SMALL("Pad the input video."),
     .priv_size     = sizeof(PadContext),