[FFmpeg-devel] [PATCH] avfilter/fade: add color option.
Clément Bœsch
u at pkh.me
Sat Nov 9 00:08:05 CET 2013
Fixes Ticket #1822.
---
doc/filters.texi | 13 +++++++++----
libavfilter/vf_fade.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++--
2 files changed, 57 insertions(+), 6 deletions(-)
diff --git a/doc/filters.texi b/doc/filters.texi
index 9fae339..cd52680 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -3809,7 +3809,8 @@ effect. Default is 0.
@item nb_frames, n
The number of frames for which the fade effect has to last. At the end of the
fade-in effect the output video will have the same intensity as the input video,
-at the end of the fade-out transition the output video will be completely black.
+at the end of the fade-out transition the output video will be filled with the
+selected @option{color}.
Default is 25.
@item alpha
@@ -3824,8 +3825,12 @@ whichever comes last. Default is 0.
@item duration, d
The number of seconds for which the fade effect has to last. At the end of the
fade-in effect the output video will have the same intensity as the input video,
-at the end of the fade-out transition the output video will be completely black.
+at the end of the fade-out transition the output video will be filled with the
+selected @option{color}.
If both duration and nb_frames are specified, duration is used. Default is 0.
+
+ at item color, c
+Specify the color of the fade. Default is "black".
@end table
@subsection Examples
@@ -3856,9 +3861,9 @@ fade=in:0:25, fade=out:975:25
@end example
@item
-Make first 5 frames black, then fade in from frame 5-24:
+Make first 5 frames yellow, then fade in from frame 5-24:
@example
-fade=in:5:20
+fade=in:5:20:color=yellow
@end example
@item
diff --git a/libavfilter/vf_fade.c b/libavfilter/vf_fade.c
index 088bd65..3a90724 100644
--- a/libavfilter/vf_fade.c
+++ b/libavfilter/vf_fade.c
@@ -61,6 +61,7 @@ typedef struct {
int alpha;
uint64_t start_time, duration;
enum {VF_FADE_WAITING=0, VF_FADE_FADING, VF_FADE_DONE} fade_state;
+ uint8_t color_rgba[4];
} FadeContext;
static av_cold int init(AVFilterContext *ctx)
@@ -94,6 +95,7 @@ static av_cold int init(AVFilterContext *ctx)
static int query_formats(AVFilterContext *ctx)
{
+ const FadeContext *s = ctx->priv;
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
@@ -105,8 +107,17 @@ static int query_formats(AVFilterContext *ctx)
AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
AV_PIX_FMT_NONE
};
+ static const enum AVPixelFormat pix_fmts_rgb[] = {
+ AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
+ AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
+ AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
+ AV_PIX_FMT_NONE
+ };
- ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+ if (memcmp(s->color_rgba, "\x00\x00\x00\xff", 4))
+ ff_set_common_formats(ctx, ff_make_format_list(pix_fmts_rgb));
+ else
+ ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
return 0;
}
@@ -138,6 +149,37 @@ static int config_props(AVFilterLink *inlink)
return 0;
}
+static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr,
+ int nb_jobs)
+{
+ FadeContext *s = ctx->priv;
+ AVFrame *frame = arg;
+ int slice_start = (frame->height * jobnr ) / nb_jobs;
+ int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
+ int i, j;
+
+ const uint8_t r = s->rgba_map[R];
+ const uint8_t g = s->rgba_map[G];
+ const uint8_t b = s->rgba_map[B];
+ const uint8_t a = s->rgba_map[A];
+ const uint8_t *c = s->color_rgba;
+
+ for (i = slice_start; i < slice_end; i++) {
+ uint8_t *p = frame->data[0] + i * frame->linesize[0];
+ for (j = 0; j < frame->width; j++) {
+#define INTERP(layer, value) av_clip_uint8(((c[value]<<16) + ((int)p[layer] - (int)c[value]) * s->factor + (1<<15)) >> 16)
+ p[r] = INTERP(r, 0);
+ p[g] = INTERP(g, 1);
+ p[b] = INTERP(b, 2);
+ if (s->alpha)
+ p[a] = INTERP(a, 3);
+ p += s->bpp;
+ }
+ }
+
+ return 0;
+}
+
static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr,
int nb_jobs)
{
@@ -271,8 +313,10 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
if (s->alpha) {
ctx->internal->execute(ctx, filter_slice_alpha, frame, NULL,
FFMIN(frame->height, ctx->graph->nb_threads));
+ } else if (s->is_packed_rgb) {
+ ctx->internal->execute(ctx, filter_slice_rgb, frame, NULL,
+ FFMIN(frame->height, ctx->graph->nb_threads));
} else {
- /* luma or rgb plane */
ctx->internal->execute(ctx, filter_slice_luma, frame, NULL,
FFMIN(frame->height, ctx->graph->nb_threads));
@@ -315,6 +359,8 @@ static const AVOption fade_options[] = {
OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
{ "d", "Duration of the effect in seconds.",
OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
+ { "color", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
+ { "c", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
{ NULL }
};
--
1.8.4.2
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