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avfilter/af_ladspa: compensate output pts if latency compensation is on

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This commit is contained in:
Paul B Mahol 2022-04-06 16:54:03 +02:00
parent fb88809063
commit 4fbf3c828b
1 changed files with 22 additions and 0 deletions
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22
libavfilter/af_ladspa.c
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@ -62,6 +62,8 @@ typedef struct LADSPAContext {
int sample_rate;
int nb_samples;
int64_t next_in_pts;
int64_t next_out_pts;
int64_t pts;
int64_t duration;
int in_trim;
@ -164,6 +166,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
LADSPAContext *s = ctx->priv;
AVFrame *out;
int i, h, p, new_out_samples;
int64_t out_duration;
int64_t in_duration;
int64_t in_pts;
av_assert0(in->ch_layout.nb_channels == (s->nb_inputs * s->nb_handles));
@ -205,6 +210,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
for (i = 0; i < s->nb_outputcontrols; i++)
print_ctl_info(ctx, AV_LOG_VERBOSE, s, i, s->ocmap, s->octlv, 1);
in_duration = av_rescale_q(in->nb_samples, inlink->time_base, av_make_q(1, in->sample_rate));
in_pts = in->pts;
if (out != in)
av_frame_free(&in);
@ -214,6 +221,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
new_out_samples -= trim;
s->in_trim -= trim;
out->nb_samples = new_out_samples;
}
if (new_out_samples <= 0) {
@ -227,6 +235,16 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
out->nb_samples = new_out_samples;
}
out_duration = av_rescale_q(out->nb_samples, inlink->time_base, av_make_q(1, out->sample_rate));
if (s->next_out_pts != AV_NOPTS_VALUE && out->pts != s->next_out_pts &&
s->next_in_pts != AV_NOPTS_VALUE && out->pts == s->next_in_pts) {
out->pts = s->next_out_pts;
} else {
out->pts = in_pts;
}
s->next_in_pts = in_pts + in_duration;
s->next_out_pts = out->pts + out_duration;
return ff_filter_frame(ctx->outputs[0], out);
}
@ -247,6 +265,7 @@ static int request_frame(AVFilterLink *outlink)
return AVERROR(ENOMEM);
s->out_pad -= frame->nb_samples;
frame->pts = s->next_in_pts;
return filter_frame(ctx->inputs[0], frame);
}
return ret;
@ -654,6 +673,9 @@ static av_cold int init(AVFilterContext *ctx)
av_log(ctx, AV_LOG_DEBUG, "input controls: %lu output controls: %lu\n",
s->nb_inputcontrols, s->nb_outputcontrols);
s->next_out_pts = AV_NOPTS_VALUE;
s->next_in_pts = AV_NOPTS_VALUE;
return 0;
}