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Diffstat (limited to 'libavfilter/vf_fade.c')
-rw-r--r--libavfilter/vf_fade.c141
1 files changed, 102 insertions, 39 deletions
diff --git a/libavfilter/vf_fade.c b/libavfilter/vf_fade.c
index 5839c6c9e6..639ef34cf9 100644
--- a/libavfilter/vf_fade.c
+++ b/libavfilter/vf_fade.c
@@ -2,20 +2,20 @@
* Copyright (c) 2010 Brandon Mintern
* Copyright (c) 2007 Bobby Bingham
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -25,14 +25,27 @@
* based heavily on vf_negate.c by Bobby Bingham
*/
+#include "libavutil/avstring.h"
#include "libavutil/common.h"
+#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
+#include "drawutils.h"
+#include "internal.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
+#define R 0
+#define G 1
+#define B 2
+#define A 3
+
+#define Y 0
+#define U 1
+#define V 2
+
#define FADE_IN 0
#define FADE_OUT 1
@@ -43,6 +56,11 @@ typedef struct {
int start_frame, nb_frames;
unsigned int frame_index, stop_frame;
int hsub, vsub, bpp;
+ unsigned int black_level, black_level_scaled;
+ uint8_t is_packed_rgb;
+ uint8_t rgba_map[4];
+ int alpha;
+
} FadeContext;
static av_cold int init(AVFilterContext *ctx, const char *args)
@@ -59,9 +77,9 @@ static av_cold int init(AVFilterContext *ctx, const char *args)
fade->stop_frame = fade->start_frame + fade->nb_frames;
av_log(ctx, AV_LOG_VERBOSE,
- "type:%s start_frame:%d nb_frames:%d\n",
+ "type:%s start_frame:%d nb_frames:%d alpha:%d\n",
fade->type == FADE_IN ? "in" : "out", fade->start_frame,
- fade->nb_frames);
+ fade->nb_frames, fade->alpha);
return 0;
}
@@ -72,7 +90,10 @@ static int query_formats(AVFilterContext *ctx)
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
+ AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
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
};
@@ -80,6 +101,13 @@ static int query_formats(AVFilterContext *ctx)
return 0;
}
+const static enum AVPixelFormat studio_level_pix_fmts[] = {
+ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
+ AV_PIX_FMT_YUV440P,
+ AV_PIX_FMT_NONE
+};
+
static int config_props(AVFilterLink *inlink)
{
FadeContext *fade = inlink->dst->priv;
@@ -89,9 +117,37 @@ static int config_props(AVFilterLink *inlink)
fade->vsub = pixdesc->log2_chroma_h;
fade->bpp = av_get_bits_per_pixel(pixdesc) >> 3;
+ fade->alpha &= pixdesc->flags & PIX_FMT_ALPHA;
+ fade->is_packed_rgb = ff_fill_rgba_map(fade->rgba_map, inlink->format) >= 0;
+
+ /* use CCIR601/709 black level for studio-level pixel non-alpha components */
+ fade->black_level =
+ ff_fmt_is_in(inlink->format, studio_level_pix_fmts) && !fade->alpha ? 16 : 0;
+ /* 32768 = 1 << 15, it is an integer representation
+ * of 0.5 and is for rounding. */
+ fade->black_level_scaled = (fade->black_level << 16) + 32768;
return 0;
}
+static void fade_plane(int y, int h, int w,
+ int fade_factor, int black_level, int black_level_scaled,
+ uint8_t offset, uint8_t step, int bytes_per_plane,
+ uint8_t *data, int line_size)
+{
+ uint8_t *p;
+ int i, j;
+
+ /* luma, alpha or rgb plane */
+ for (i = 0; i < h; i++) {
+ p = data + offset + (y+i) * line_size;
+ for (j = 0; j < w * bytes_per_plane; j++) {
+ /* fade->factor is using 16 lower-order bits for decimal places. */
+ *p = ((*p - black_level) * fade_factor + black_level_scaled) >> 16;
+ p+=step;
+ }
+ }
+}
+
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
FadeContext *fade = inlink->dst->priv;
@@ -99,29 +155,33 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
int i, j, plane;
if (fade->factor < UINT16_MAX) {
- /* luma or rgb plane */
- for (i = 0; i < frame->height; i++) {
- p = frame->data[0] + i * frame->linesize[0];
- for (j = 0; j < inlink->w * fade->bpp; j++) {
- /* fade->factor is using 16 lower-order bits for decimal
- * places. 32768 = 1 << 15, it is an integer representation
- * of 0.5 and is for rounding. */
- *p = (*p * fade->factor + 32768) >> 16;
- p++;
- }
- }
-
- if (frame->data[1] && frame->data[2]) {
- /* chroma planes */
- for (plane = 1; plane < 3; plane++) {
- for (i = 0; i < frame->height; i++) {
- p = frame->data[plane] + (i >> fade->vsub) * frame->linesize[plane];
- for (j = 0; j < inlink->w >> fade->hsub; j++) {
- /* 8421367 = ((128 << 1) + 1) << 15. It is an integer
- * representation of 128.5. The .5 is for rounding
- * purposes. */
- *p = ((*p - 128) * fade->factor + 8421367) >> 16;
- p++;
+ if (fade->alpha) {
+ // alpha only
+ plane = fade->is_packed_rgb ? 0 : A; // alpha is on plane 0 for packed formats
+ // or plane 3 for planar formats
+ fade_plane(0, frame->height, inlink->w,
+ fade->factor, fade->black_level, fade->black_level_scaled,
+ fade->is_packed_rgb ? fade->rgba_map[A] : 0, // alpha offset for packed formats
+ fade->is_packed_rgb ? 4 : 1, // pixstep for 8 bit packed formats
+ 1, frame->data[plane], frame->linesize[plane]);
+ } else {
+ /* luma or rgb plane */
+ fade_plane(0, frame->height, inlink->w,
+ fade->factor, fade->black_level, fade->black_level_scaled,
+ 0, 1, // offset & pixstep for Y plane or RGB packed format
+ fade->bpp, frame->data[0], frame->linesize[0]);
+ if (frame->data[1] && frame->data[2]) {
+ /* chroma planes */
+ for (plane = 1; plane < 3; plane++) {
+ for (i = 0; i < frame->height; i++) {
+ p = frame->data[plane] + (i >> fade->vsub) * frame->linesize[plane];
+ for (j = 0; j < inlink->w >> fade->hsub; j++) {
+ /* 8421367 = ((128 << 1) + 1) << 15. It is an integer
+ * representation of 128.5. The .5 is for rounding
+ * purposes. */
+ *p = ((*p - 128) * fade->factor + 8421367) >> 16;
+ p++;
+ }
}
}
}
@@ -137,25 +197,28 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
return ff_filter_frame(inlink->dst->outputs[0], frame);
}
+
#define OFFSET(x) offsetof(FadeContext, x)
-#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
-static const AVOption options[] = {
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption fade_options[] = {
{ "type", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
+ { "t", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
{ "in", "fade-in", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN }, .unit = "type" },
{ "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .unit = "type" },
{ "start_frame", "Number of the first frame to which to apply the effect.",
OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
+ { "s", "Number of the first frame to which to apply the effect.",
+ OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
{ "nb_frames", "Number of frames to which the effect should be applied.",
- OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, FLAGS },
+ OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS },
+ { "n", "Number of frames to which the effect should be applied.",
+ OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS },
+ { "alpha", "fade alpha if it is available on the input", OFFSET(alpha), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS },
{ NULL },
};
-static const AVClass fade_class = {
- .class_name = "fade",
- .item_name = av_default_item_name,
- .option = options,
- .version = LIBAVUTIL_VERSION_INT,
-};
+AVFILTER_DEFINE_CLASS(fade);
static const AVFilterPad avfilter_vf_fade_inputs[] = {
{
@@ -179,7 +242,7 @@ static const AVFilterPad avfilter_vf_fade_outputs[] = {
AVFilter avfilter_vf_fade = {
.name = "fade",
- .description = NULL_IF_CONFIG_SMALL("Fade in/out input video"),
+ .description = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
.init = init,
.priv_size = sizeof(FadeContext),
.priv_class = &fade_class,
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 09:27:37 +0000