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started audio speed stretching

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itsmattkc
2019-12-18 22:38:34 +11:00
parent 836192df48
commit d1ace48ff9
1 changed files with 23 additions and 0 deletions
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app/render/backend/audiorenderworker.cpp
+23
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@@ -51,6 +51,29 @@ NodeValueTable AudioRenderWorker::RenderBlock(const TrackOutput *track, const Ti
int copied_size = 0;
if (!samples_from_this_block.isEmpty()) {
// Stretch samples here
if (b->media_length() != b->length()) {
QByteArray speed_adjusted_samples;
double clip_speed = b->speed();
int sample_count = audio_params_.bytes_to_samples(samples_from_this_block.size());
qDebug() << "Adjusting audio to speed" << clip_speed;
for (double i=0;i<sample_count;i+=clip_speed) {
int sample_index = qFloor(i);
int byte_index = audio_params_.samples_to_bytes(sample_index);
if (byte_index >= samples_from_this_block.size() || (byte_index + audio_params_.samples_to_bytes(1)) > samples_from_this_block.size()) {
qDebug() << "Tried to access" << byte_index << "-" << (byte_index + audio_params_.samples_to_bytes(1)) << "of" << samples_from_this_block.size();
}
QByteArray sample_at_this_index = samples_from_this_block.mid(byte_index, audio_params_.samples_to_bytes(1));
speed_adjusted_samples.append(sample_at_this_index);
}
samples_from_this_block = speed_adjusted_samples;
}
copied_size = samples_from_this_block.size();
memcpy(block_range_buffer.data()+destination_offset,