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added speed changes while maintaining audio pitch

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This commit is contained in:
itsmattkc
2018-10-05 11:02:04 +10:00
parent 06e3ec9d4f
commit 4b7e62ddb7
5 changed files with 31 additions and 8 deletions
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playback/cacher.cpp
+18 -3
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@@ -490,13 +490,28 @@ void open_clip_worker(Clip* clip) {
qDebug() << "[ERROR] Could not set output sample format";
}
int sample_rates[] = { qRound(sequence->audio_frequency / clip->speed), 0 };
int target_sample_rate = sequence->audio_frequency;
if (qFuzzyCompare(clip->speed, 1.0)) {
avfilter_link(clip->buffersrc_ctx, 0, clip->buffersink_ctx, 0);
} else if (clip->maintain_audio_pitch) {
char speed_param[10];
snprintf(speed_param, sizeof(speed_param), "%f", clip->speed);
AVFilterContext* tempo_filter;
avfilter_graph_create_filter(&tempo_filter, avfilter_get_by_name("atempo"), "atempo", speed_param, NULL, clip->filter_graph);
avfilter_link(clip->buffersrc_ctx, 0, tempo_filter, 0);
avfilter_link(tempo_filter, 0, clip->buffersink_ctx, 0);
} else {
target_sample_rate = qRound(sequence->audio_frequency / clip->speed);
avfilter_link(clip->buffersrc_ctx, 0, clip->buffersink_ctx, 0);
}
int sample_rates[] = { target_sample_rate, 0 };
if (av_opt_set_int_list(clip->buffersink_ctx, "sample_rates", sample_rates, 0, AV_OPT_SEARCH_CHILDREN) < 0) {
qDebug() << "[ERROR] Could not set output sample rates";
}
avfilter_link(clip->buffersrc_ctx, 0, clip->buffersink_ctx, 0);
avfilter_graph_config(clip->filter_graph, NULL);
clip->audio_reset = true;