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avfilter/avf_showvolume: switch to activate

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This commit is contained in:
Paul B Mahol 2019-05-27 18:44:19 +02:00
parent f78172b29a
commit 5ddaedcaec
1 changed files with 26 additions and 6 deletions
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32
libavfilter/avf_showvolume.c
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@ -26,6 +26,7 @@
#include "libavutil/parseutils.h"
#include "libavutil/xga_font_data.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "audio.h"
#include "video.h"
@ -47,6 +48,7 @@ typedef struct ShowVolumeContext {
float bgopacity;
int mode;
int nb_samples;
AVFrame *out;
AVExpr *c_expr;
int draw_text;
@ -162,12 +164,8 @@ static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
ShowVolumeContext *s = ctx->priv;
int nb_samples;
nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
inlink->partial_buf_size =
inlink->min_samples =
inlink->max_samples = nb_samples;
s->nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
s->values = av_calloc(inlink->channels * VAR_VARS_NB, sizeof(double));
if (!s->values)
return AVERROR(ENOMEM);
@ -449,6 +447,28 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
return ff_filter_frame(outlink, out);
}
static int activate(AVFilterContext *ctx)
{
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
ShowVolumeContext *s = ctx->priv;
AVFrame *in = NULL;
int ret;
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
if (ret < 0)
return ret;
if (ret > 0)
return filter_frame(inlink, in);
FF_FILTER_FORWARD_STATUS(inlink, outlink);
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return FFERROR_NOT_READY;
}
static av_cold void uninit(AVFilterContext *ctx)
{
ShowVolumeContext *s = ctx->priv;
@ -465,7 +485,6 @@ static const AVFilterPad showvolume_inputs[] = {
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = config_input,
.filter_frame = filter_frame,
},
{ NULL }
};
@ -483,6 +502,7 @@ AVFilter ff_avf_showvolume = {
.name = "showvolume",
.description = NULL_IF_CONFIG_SMALL("Convert input audio volume to video output."),
.init = init,
.activate = activate,
.uninit = uninit,
.query_formats = query_formats,
.priv_size = sizeof(ShowVolumeContext),