static int mode08(int c, int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8)
{
REMOVE_GRAIN_SORT_AXIS
const int d1 = ma1 - mi1;
const int d2 = ma2 - mi2;
const int d3 = ma3 - mi3;
const int d4 = ma4 - mi4;
const int cli1 = av_clip(c, mi1, ma1);
const int cli2 = av_clip(c, mi2, ma2);
const int cli3 = av_clip(c, mi3, ma3);
const int cli4 = av_clip(c, mi4, ma4);
const int c1 = av_clip_uint16(FFABS(c - cli1) + (d1 << 1));
const int c2 = av_clip_uint16(FFABS(c - cli2) + (d2 << 1));
const int c3 = av_clip_uint16(FFABS(c - cli3) + (d3 << 1));
const int c4 = av_clip_uint16(FFABS(c - cli4) + (d4 << 1));
const int mindiff = FFMIN(FFMIN(c1, c2), FFMIN(c3, c4));
if (mindiff == c4) {
return cli4;
} else if (mindiff == c2) {
return cli2;
} else if (mindiff == c3) {
return cli3;
}
return cli1;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
FadeContext *s = ctx->priv;
double frame_timestamp = frame->pts == AV_NOPTS_VALUE ? -1 : frame->pts * av_q2d(inlink->time_base);
// Calculate Fade assuming this is a Fade In
if (s->fade_state == VF_FADE_WAITING) {
s->factor=0;
if (frame_timestamp >= s->start_time/(double)AV_TIME_BASE
&& inlink->frame_count_out >= s->start_frame) {
// Time to start fading
s->fade_state = VF_FADE_FADING;
// Save start time in case we are starting based on frames and fading based on time
if (s->start_time == 0 && s->start_frame != 0) {
s->start_time = frame_timestamp*(double)AV_TIME_BASE;
}
// Save start frame in case we are starting based on time and fading based on frames
if (s->start_time != 0 && s->start_frame == 0) {
s->start_frame = inlink->frame_count_out;
}
}
}
if (s->fade_state == VF_FADE_FADING) {
if (s->duration == 0) {
// Fading based on frame count
s->factor = (inlink->frame_count_out - s->start_frame) * s->fade_per_frame;
if (inlink->frame_count_out > s->start_frame + s->nb_frames) {
s->fade_state = VF_FADE_DONE;
}
} else {
// Fading based on duration
s->factor = (frame_timestamp - s->start_time/(double)AV_TIME_BASE)
* (float) UINT16_MAX / (s->duration/(double)AV_TIME_BASE);
if (frame_timestamp > s->start_time/(double)AV_TIME_BASE
+ s->duration/(double)AV_TIME_BASE) {
s->fade_state = VF_FADE_DONE;
}
}
}
if (s->fade_state == VF_FADE_DONE) {
s->factor=UINT16_MAX;
}
s->factor = av_clip_uint16(s->factor);
// Invert fade_factor if Fading Out
if (s->type == FADE_OUT) {
s->factor=UINT16_MAX-s->factor;
}
if (s->factor < UINT16_MAX) {
if (s->alpha) {
ctx->internal->execute(ctx, filter_slice_alpha, frame, NULL,
FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
} else if (s->is_packed_rgb && !s->black_fade) {
ctx->internal->execute(ctx, filter_slice_rgb, frame, NULL,
FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
} else {
/* luma, or rgb plane in case of black */
ctx->internal->execute(ctx, filter_slice_luma, frame, NULL,
FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
if (frame->data[1] && frame->data[2]) {
/* chroma planes */
ctx->internal->execute(ctx, filter_slice_chroma, frame, NULL,
FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
}
}
}
return ff_filter_frame(inlink->dst->outputs[0], frame);
}
