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avfilter/vf_xfade: add fadegrays transition

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This commit is contained in:
Paul B Mahol 2020-08-26 23:23:33 +02:00
parent 389cc142fb
commit e13eb58941
2 changed files with 76 additions and 4 deletions
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1
doc/filters.texi
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@ -20520,6 +20520,7 @@ Set one of available transition effects:
@item vuslice
@item vdslice
@item hblur
@item fadegrays
@end table
Default transition effect is fade.

79
libavfilter/vf_xfade.c
View File

@ -66,6 +66,7 @@ enum XFadeTransitions {
VUSLICE,
VDSLICE,
HBLUR,
FADEGRAYS,
NB_TRANSITIONS,
};
@ -79,6 +80,7 @@ typedef struct XFadeContext {
int nb_planes;
int depth;
int is_rgb;
int64_t duration_pts;
int64_t offset_pts;
@ -184,6 +186,7 @@ static const AVOption xfade_options[] = {
{ "vuslice", "vu slice transition", 0, AV_OPT_TYPE_CONST, {.i64=VUSLICE}, 0, 0, FLAGS, "transition" },
{ "vdslice", "vd slice transition", 0, AV_OPT_TYPE_CONST, {.i64=VDSLICE}, 0, 0, FLAGS, "transition" },
{ "hblur", "hblur transition", 0, AV_OPT_TYPE_CONST, {.i64=HBLUR}, 0, 0, FLAGS, "transition" },
{ "fadegrays", "fadegrays transition", 0, AV_OPT_TYPE_CONST, {.i64=FADEGRAYS}, 0, 0, FLAGS, "transition" },
{ "duration", "set cross fade duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=1000000}, 0, 60000000, FLAGS },
{ "offset", "set cross fade start relative to first input stream", OFFSET(offset), AV_OPT_TYPE_DURATION, {.i64=0}, INT64_MIN, INT64_MAX, FLAGS },
{ "expr", "set expression for custom transition", OFFSET(custom_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
@ -1345,6 +1348,74 @@ static void hblur##name##_transition(AVFilterContext *ctx,
HBLUR_TRANSITION(8, uint8_t, 1)
HBLUR_TRANSITION(16, uint16_t, 2)
#define FADEGRAYS_TRANSITION(name, type, div) \
static void fadegrays##name##_transition(AVFilterContext *ctx, \
const AVFrame *a, const AVFrame *b, AVFrame *out, \
float progress, \
int slice_start, int slice_end, int jobnr) \
{ \
XFadeContext *s = ctx->priv; \
const int width = out->width; \
const int is_rgb = s->is_rgb; \
const int mid = (s->max_value + 1) / 2; \
const float phase = 0.2f; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < width; x++) { \
int bg[2][4]; \
if (is_rgb) { \
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + \
y * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + \
y * b->linesize[p]); \
bg[0][0] += xf0[x]; \
bg[1][0] += xf1[x]; \
if (p == 3) { \
bg[0][3] = xf0[x]; \
bg[1][3] = xf1[x]; \
} \
} \
bg[0][0] = bg[0][0] / s->nb_planes; \
bg[1][0] = bg[1][0] / s->nb_planes; \
bg[0][1] = bg[0][2] = bg[0][0]; \
bg[1][1] = bg[1][2] = bg[1][0]; \
} else { \
const type *yf0 = (const type *)(a->data[0] + \
y * a->linesize[0]); \
const type *yf1 = (const type *)(b->data[0] + \
y * a->linesize[0]); \
bg[0][0] = yf0[x]; \
bg[1][0] = yf1[x]; \
if (s->nb_planes == 4) { \
const type *af0 = (const type *)(a->data[3] + \
y * a->linesize[3]); \
const type *af1 = (const type *)(b->data[3] + \
y * a->linesize[3]); \
bg[0][3] = af0[x]; \
bg[1][3] = af1[x]; \
} \
bg[0][1] = bg[1][1] = mid; \
bg[0][2] = bg[1][2] = mid; \
} \
\
for (int p = 0; p < s->nb_planes; p++) { \
const type *xf0 = (const type *)(a->data[p] + y * a->linesize[p]); \
const type *xf1 = (const type *)(b->data[p] + y * b->linesize[p]); \
type *dst = (type *)(out->data[p] + y * out->linesize[p]); \
\
dst[x] = mix(mix(xf0[x], bg[0][p], \
smoothstep(1.f-phase, 1.f, progress)), \
mix(bg[1][p], xf1[x], smoothstep(phase, 1.f, progress)), \
progress); \
} \
} \
} \
}
FADEGRAYS_TRANSITION(8, uint8_t, 1)
FADEGRAYS_TRANSITION(16, uint16_t, 2)
static inline double getpix(void *priv, double x, double y, int plane, int nb)
{
XFadeContext *s = priv;
@ -1386,7 +1457,6 @@ static int config_output(AVFilterLink *outlink)
AVFilterLink *inlink1 = ctx->inputs[1];
XFadeContext *s = ctx->priv;
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink0->format);
int is_rgb;
if (inlink0->format != inlink1->format) {
av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
@ -1434,14 +1504,14 @@ static int config_output(AVFilterLink *outlink)
outlink->frame_rate = inlink0->frame_rate;
s->depth = pix_desc->comp[0].depth;
is_rgb = !!(pix_desc->flags & AV_PIX_FMT_FLAG_RGB);
s->is_rgb = !!(pix_desc->flags & AV_PIX_FMT_FLAG_RGB);
s->nb_planes = av_pix_fmt_count_planes(inlink0->format);
s->max_value = (1 << s->depth) - 1;
s->black[0] = 0;
s->black[1] = s->black[2] = is_rgb ? 0 : s->max_value / 2;
s->black[1] = s->black[2] = s->is_rgb ? 0 : s->max_value / 2;
s->black[3] = s->max_value;
s->white[0] = s->white[3] = s->max_value;
s->white[1] = s->white[2] = is_rgb ? s->max_value : s->max_value / 2;
s->white[1] = s->white[2] = s->is_rgb ? s->max_value : s->max_value / 2;
s->first_pts = s->last_pts = s->pts = AV_NOPTS_VALUE;
@ -1488,6 +1558,7 @@ static int config_output(AVFilterLink *outlink)
case VUSLICE: s->transitionf = s->depth <= 8 ? vuslice8_transition : vuslice16_transition; break;
case VDSLICE: s->transitionf = s->depth <= 8 ? vdslice8_transition : vdslice16_transition; break;
case HBLUR: s->transitionf = s->depth <= 8 ? hblur8_transition : hblur16_transition; break;
case FADEGRAYS: s->transitionf = s->depth <= 8 ? fadegrays8_transition : fadegrays16_transition; break;
}
if (s->transition == CUSTOM) {