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avfilter/f_loop: switch to activate

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This commit is contained in:
Paul B Mahol 2018-11-02 10:11:24 +01:00
parent 4620e4c7ad
commit ef1aadffc7
1 changed files with 39 additions and 19 deletions
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52
libavfilter/f_loop.c
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@ -25,6 +25,7 @@
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
@ -44,6 +45,7 @@ typedef struct LoopContext {
int64_t ignored_samples;
int loop;
int eof;
int64_t size;
int64_t start;
int64_t pts;
@ -330,25 +332,44 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
return ret;
}
static int request_frame(AVFilterLink *outlink)
static int activate(AVFilterContext *ctx)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
LoopContext *s = ctx->priv;
int ret = 0;
AVFrame *frame = NULL;
int ret, status;
int64_t pts;
if ((!s->size) ||
(s->nb_frames < s->size) ||
(s->nb_frames >= s->size && s->loop == 0)) {
ret = ff_request_frame(ctx->inputs[0]);
} else {
ret = push_frame(ctx);
}
if (ret == AVERROR_EOF && s->nb_frames > 0 && s->loop != 0) {
ret = push_frame(ctx);
}
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
if (!s->eof && (s->nb_frames < s->size || !s->loop)) {
ret = ff_inlink_consume_frame(inlink, &frame);
if (ret < 0)
return ret;
if (ret > 0)
return filter_frame(inlink, frame);
}
if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
if (status == AVERROR_EOF)
s->eof = 1;
}
if (s->eof && (s->loop == 0 || s->nb_frames < s->size)) {
ff_outlink_set_status(outlink, AVERROR_EOF, s->duration);
return 0;
}
if (!s->eof && (!s->size ||
(s->nb_frames < s->size) ||
(s->nb_frames >= s->size && s->loop == 0))) {
FF_FILTER_FORWARD_WANTED(outlink, inlink);
} else if (s->loop && s->nb_frames == s->size) {
return push_frame(ctx);
}
return FFERROR_NOT_READY;
}
static const AVOption loop_options[] = {
@ -364,7 +385,6 @@ static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
};
@ -373,7 +393,6 @@ static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = request_frame,
},
{ NULL }
};
@ -385,6 +404,7 @@ AVFilter ff_vf_loop = {
.priv_class = &loop_class,
.init = init,
.uninit = uninit,
.activate = activate,
.inputs = inputs,
.outputs = outputs,
};