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@ -47,21 +47,21 @@ typedef struct { |
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static av_cold int init(AVFilterContext *ctx) |
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{ |
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FadeContext *fade = ctx->priv; |
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fade->fade_per_frame = (1 << 16) / fade->nb_frames; |
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if (fade->type == FADE_IN) { |
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fade->factor = 0; |
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} else if (fade->type == FADE_OUT) { |
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fade->fade_per_frame = -fade->fade_per_frame; |
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fade->factor = (1 << 16); |
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FadeContext *s = ctx->priv; |
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s->fade_per_frame = (1 << 16) / s->nb_frames; |
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if (s->type == FADE_IN) { |
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s->factor = 0; |
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} else if (s->type == FADE_OUT) { |
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s->fade_per_frame = -s->fade_per_frame; |
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s->factor = (1 << 16); |
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} |
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fade->stop_frame = fade->start_frame + fade->nb_frames; |
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s->stop_frame = s->start_frame + s->nb_frames; |
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av_log(ctx, AV_LOG_VERBOSE, |
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"type:%s start_frame:%d nb_frames:%d\n", |
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fade->type == FADE_IN ? "in" : "out", fade->start_frame, |
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fade->nb_frames); |
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s->type == FADE_IN ? "in" : "out", s->start_frame, |
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s->nb_frames); |
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return 0; |
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} |
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@ -82,31 +82,31 @@ static int query_formats(AVFilterContext *ctx) |
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static int config_props(AVFilterLink *inlink) |
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{ |
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FadeContext *fade = inlink->dst->priv; |
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FadeContext *s = inlink->dst->priv; |
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const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format); |
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fade->hsub = pixdesc->log2_chroma_w; |
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fade->vsub = pixdesc->log2_chroma_h; |
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s->hsub = pixdesc->log2_chroma_w; |
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s->vsub = pixdesc->log2_chroma_h; |
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fade->bpp = av_get_bits_per_pixel(pixdesc) >> 3; |
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s->bpp = av_get_bits_per_pixel(pixdesc) >> 3; |
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return 0; |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
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{ |
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FadeContext *fade = inlink->dst->priv; |
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FadeContext *s = inlink->dst->priv; |
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uint8_t *p; |
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int i, j, plane; |
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if (fade->factor < UINT16_MAX) { |
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if (s->factor < UINT16_MAX) { |
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/* luma or rgb plane */ |
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for (i = 0; i < frame->height; i++) { |
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p = frame->data[0] + i * frame->linesize[0]; |
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for (j = 0; j < inlink->w * fade->bpp; j++) { |
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/* fade->factor is using 16 lower-order bits for decimal
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for (j = 0; j < inlink->w * s->bpp; j++) { |
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/* s->factor is using 16 lower-order bits for decimal
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* places. 32768 = 1 << 15, it is an integer representation |
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* of 0.5 and is for rounding. */ |
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*p = (*p * fade->factor + 32768) >> 16; |
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*p = (*p * s->factor + 32768) >> 16; |
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p++; |
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} |
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} |
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@ -115,12 +115,12 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
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/* chroma planes */ |
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for (plane = 1; plane < 3; plane++) { |
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for (i = 0; i < frame->height; i++) { |
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p = frame->data[plane] + (i >> fade->vsub) * frame->linesize[plane]; |
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for (j = 0; j < inlink->w >> fade->hsub; j++) { |
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p = frame->data[plane] + (i >> s->vsub) * frame->linesize[plane]; |
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for (j = 0; j < inlink->w >> s->hsub; j++) { |
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/* 8421367 = ((128 << 1) + 1) << 15. It is an integer
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* representation of 128.5. The .5 is for rounding |
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* purposes. */ |
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*p = ((*p - 128) * fade->factor + 8421367) >> 16; |
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*p = ((*p - 128) * s->factor + 8421367) >> 16; |
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p++; |
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} |
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} |
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@ -128,11 +128,11 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
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} |
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} |
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if (fade->frame_index >= fade->start_frame && |
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fade->frame_index <= fade->stop_frame) |
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fade->factor += fade->fade_per_frame; |
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fade->factor = av_clip_uint16(fade->factor); |
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fade->frame_index++; |
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if (s->frame_index >= s->start_frame && |
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s->frame_index <= s->stop_frame) |
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s->factor += s->fade_per_frame; |
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s->factor = av_clip_uint16(s->factor); |
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s->frame_index++; |
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return ff_filter_frame(inlink->dst->outputs[0], frame); |
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} |
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