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avfilter/vf_separatefields: do not reset pts to 0 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-10-12 14:55:42 +00:00
parent 8de021fabe
commit 1d8ce109e9
1 changed files with 56 additions and 23 deletions
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79
libavfilter/vf_separatefields.c
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@ -24,7 +24,7 @@
typedef struct {
int nb_planes;
double ts_unit;
AVFrame *second;
} SeparateFieldsContext;
static int config_props_output(AVFilterLink *outlink)
@ -46,44 +46,76 @@ static int config_props_output(AVFilterLink *outlink)
outlink->frame_rate.den = inlink->frame_rate.den;
outlink->w = inlink->w;
outlink->h = inlink->h / 2;
sf->ts_unit = av_q2d(av_inv_q(av_mul_q(outlink->frame_rate, outlink->time_base)));
return 0;
}
static void extract_field(AVFrame *frame, int nb_planes, int type)
{
int i;
for (i = 0; i < nb_planes; i++) {
if (type)
frame->data[i] = frame->data[i] + frame->linesize[i];
frame->linesize[i] *= 2;
}
}
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
{
AVFilterContext *ctx = inlink->dst;
SeparateFieldsContext *sf = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *second;
int i, ret;
int ret;
inpicref->height = outlink->h;
inpicref->interlaced_frame = 0;
second = av_frame_clone(inpicref);
if (!second)
return AVERROR(ENOMEM);
if (!sf->second) {
goto clone;
} else {
AVFrame *second = sf->second;
for (i = 0; i < sf->nb_planes; i++) {
if (!inpicref->top_field_first)
inpicref->data[i] = inpicref->data[i] + inpicref->linesize[i];
extract_field(second, sf->nb_planes, second->top_field_first);
if (second->pts != AV_NOPTS_VALUE &&
inpicref->pts != AV_NOPTS_VALUE)
second->pts += inpicref->pts;
else
second->data[i] = second->data[i] + second->linesize[i];
inpicref->linesize[i] *= 2;
second->linesize[i] *= 2;
second->pts = AV_NOPTS_VALUE;
ret = ff_filter_frame(outlink, second);
if (ret < 0)
return ret;
clone:
sf->second = av_frame_clone(inpicref);
if (!sf->second)
return AVERROR(ENOMEM);
}
inpicref->pts = outlink->frame_count * sf->ts_unit;
ret = ff_filter_frame(outlink, inpicref);
if (ret < 0) {
av_frame_free(&second);
return ret;
extract_field(inpicref, sf->nb_planes, !inpicref->top_field_first);
if (inpicref->pts != AV_NOPTS_VALUE)
inpicref->pts *= 2;
return ff_filter_frame(outlink, inpicref);
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
SeparateFieldsContext *sf = ctx->priv;
int ret;
ret = ff_request_frame(ctx->inputs[0]);
if (ret == AVERROR_EOF && sf->second) {
sf->second->pts *= 2;
extract_field(sf->second, sf->nb_planes, sf->second->top_field_first);
ret = ff_filter_frame(outlink, sf->second);
sf->second = 0;
}
second->pts = outlink->frame_count * sf->ts_unit;
return ff_filter_frame(outlink, second);
return ret;
}
static const AVFilterPad separatefields_inputs[] = {
@ -97,9 +129,10 @@ static const AVFilterPad separatefields_inputs[] = {
static const AVFilterPad separatefields_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_props_output,
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_props_output,
.request_frame = request_frame,
},
{ NULL }
};