diff options
| -rw-r--r-- | doc/filters.texi | 5 | ||||
| -rw-r--r-- | libavfilter/vsrc_testsrc.c | 12 |
2 files changed, 14 insertions, 3 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 4c1ef0f485..2324b96867 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -16394,6 +16394,11 @@ The sources accept the following parameters: @table @option +@item alpha +Specify the alpha (opacity) of the background, only available in the +@code{testsrc2} source. The value must be between 0 (fully transparent) and +255 (fully opaque, the default). + @item color, c Specify the color of the source, only available in the @code{color} source. For the syntax of this option, check the "Color" section in the diff --git a/libavfilter/vsrc_testsrc.c b/libavfilter/vsrc_testsrc.c index c4a5ae3742..fe0d50aa41 100644 --- a/libavfilter/vsrc_testsrc.c +++ b/libavfilter/vsrc_testsrc.c @@ -66,6 +66,9 @@ typedef struct TestSourceContext { /* only used by testsrc */ int nb_decimals; + /* only used by testsrc2 */ + int alpha; + /* only used by color */ FFDrawContext draw; FFDrawColor color; @@ -685,6 +688,7 @@ AVFilter ff_vsrc_testsrc = { static const AVOption testsrc2_options[] = { COMMON_OPTIONS + { "alpha", "set global alpha (opacity)", OFFSET(alpha), AV_OPT_TYPE_INT, {.i64 = 255}, 0, 255, FLAGS }, { NULL } }; @@ -735,6 +739,7 @@ static void test2_fill_picture(AVFilterContext *ctx, AVFrame *frame) { TestSourceContext *s = ctx->priv; FFDrawColor color; + unsigned alpha = (uint32_t)s->alpha << 24; /* colored background */ { @@ -746,7 +751,8 @@ static void test2_fill_picture(AVFilterContext *ctx, AVFrame *frame) x2 = ff_draw_round_to_sub(&s->draw, 0, 0, x2); set_color(s, &color, ((i & 1) ? 0xFF0000 : 0) | ((i & 2) ? 0x00FF00 : 0) | - ((i & 4) ? 0x0000FF : 0)); + ((i & 4) ? 0x0000FF : 0) | + alpha); ff_fill_rectangle(&s->draw, &color, frame->data, frame->linesize, x, 0, x2 - x, frame->height); x = x2; @@ -763,7 +769,7 @@ static void test2_fill_picture(AVFilterContext *ctx, AVFrame *frame) g0 = av_rescale_q(s->pts, s->time_base, av_make_q(1, 128)); for (x = 0; x < s->w; x += dx) { g = (av_rescale(x, 6 * 256, s->w) + g0) % (6 * 256); - set_color(s, &color, color_gradient(g)); + set_color(s, &color, color_gradient(g) | alpha); y = y0 + av_rescale(x, s->h / 2, s->w); y %= 2 * (s->h - 16); if (y > s->h - 16) @@ -785,7 +791,7 @@ static void test2_fill_picture(AVFilterContext *ctx, AVFrame *frame) int c, i; for (c = 0; c < 3; c++) { - set_color(s, &color, 0xBBBBBB ^ (0xFF << (c << 3))); + set_color(s, &color, (0xBBBBBB ^ (0xFF << (c << 3))) | alpha); pos = av_rescale_q(s->pts, s->time_base, av_make_q(64 >> (c << 1), cycle)) % cycle; xh = pos < 1 * l ? pos : pos < 2 * l ? l : |