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avfilter/af_aecho: switch to activate

This commit is contained in:
Paul B Mahol 2019-11-17 11:57:52 +01:00
parent b741a84a15
commit 90622f9e8f
1 changed files with 47 additions and 22 deletions
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69
libavfilter/af_aecho.c
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@ -24,6 +24,7 @@
#include "libavutil/samplefmt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
#include "internal.h"
typedef struct AudioEchoContext {
@ -36,6 +37,7 @@ typedef struct AudioEchoContext {
uint8_t **delayptrs;
int max_samples, fade_out;
int *samples;
int eof;
int64_t next_pts;
void (*echo_samples)(struct AudioEchoContext *ctx, uint8_t **delayptrs,
@ -302,42 +304,65 @@ static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AudioEchoContext *s = ctx->priv;
int ret;
int nb_samples = FFMIN(s->fade_out, 2048);
AVFrame *frame = ff_get_audio_buffer(outlink, nb_samples);
ret = ff_request_frame(ctx->inputs[0]);
if (!frame)
return AVERROR(ENOMEM);
s->fade_out -= nb_samples;
if (ret == AVERROR_EOF && !ctx->is_disabled && s->fade_out) {
int nb_samples = FFMIN(s->fade_out, 2048);
AVFrame *frame;
av_samples_set_silence(frame->extended_data, 0,
frame->nb_samples,
outlink->channels,
frame->format);
frame = ff_get_audio_buffer(outlink, nb_samples);
if (!frame)
return AVERROR(ENOMEM);
s->fade_out -= nb_samples;
s->echo_samples(s, s->delayptrs, frame->extended_data, frame->extended_data,
frame->nb_samples, outlink->channels);
av_samples_set_silence(frame->extended_data, 0,
frame->nb_samples,
outlink->channels,
frame->format);
frame->pts = s->next_pts;
if (s->next_pts != AV_NOPTS_VALUE)
s->next_pts += av_rescale_q(nb_samples, (AVRational){1, outlink->sample_rate}, outlink->time_base);
s->echo_samples(s, s->delayptrs, frame->extended_data, frame->extended_data,
frame->nb_samples, outlink->channels);
return ff_filter_frame(outlink, frame);
}
frame->pts = s->next_pts;
if (s->next_pts != AV_NOPTS_VALUE)
s->next_pts += av_rescale_q(nb_samples, (AVRational){1, outlink->sample_rate}, outlink->time_base);
static int activate(AVFilterContext *ctx)
{
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
AudioEchoContext *s = ctx->priv;
AVFrame *in;
int ret, status;
int64_t pts;
return ff_filter_frame(outlink, frame);
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
ret = ff_inlink_consume_frame(inlink, &in);
if (ret < 0)
return ret;
if (ret > 0)
return filter_frame(inlink, in);
if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
if (status == AVERROR_EOF)
s->eof = 1;
}
return ret;
if (s->eof && s->fade_out <= 0) {
ff_outlink_set_status(outlink, AVERROR_EOF, s->next_pts);
return 0;
}
if (!s->eof)
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return request_frame(outlink);
}
static const AVFilterPad aecho_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.filter_frame = filter_frame,
},
{ NULL }
};
@ -345,7 +370,6 @@ static const AVFilterPad aecho_inputs[] = {
static const AVFilterPad aecho_outputs[] = {
{
.name = "default",
.request_frame = request_frame,
.config_props = config_output,
.type = AVMEDIA_TYPE_AUDIO,
},
@ -359,6 +383,7 @@ AVFilter ff_af_aecho = {
.priv_size = sizeof(AudioEchoContext),
.priv_class = &aecho_class,
.init = init,
.activate = activate,
.uninit = uninit,
.inputs = aecho_inputs,
.outputs = aecho_outputs,