openshot/libopenshot
0
0
Fork 0
mirror of https://github.com/OpenShot/libopenshot.git synced 2026-03-02 08:53:52 -08:00
Code Issues Packages Projects Releases Wiki Activity

Some performance optimizations. to reduce # of calls to GetAudioSamples()

Browse Source
This commit is contained in:
Jonathan Thomas
2022-11-01 16:48:37 -05:00
parent c838c126ad
commit 4265d84ff9
1 changed files with 9 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/AudioWaveformer.cpp
View File

@@ -67,12 +67,19 @@ AudioWaveformData AudioWaveformer::ExtractSamples(int channel, int num_per_secon
// Get next frame
shared_ptr<openshot::Frame> frame = reader->GetFrame(f);
// Cache channels for this frame, to reduce # of calls to frame->GetAudioSamples
float* channels[channel_count];
for (auto channel_index = 0; channel_index < reader->info.channels; channel_index++) {
if (channel == channel_index || channel == -1) {
channels[channel_index] = frame->GetAudioSamples(channel_index);
}
}
// Get sample value from a specific channel (or all channels)
for (auto s = 0; s < frame->GetAudioSamplesCount(); s++) {
for (auto channel_index = 0; channel_index < reader->info.channels; channel_index++) {
if (channel == channel_index || channel == -1) {
float *samples = frame->GetAudioSamples(channel_index);
float *samples = channels[channel_index];
float rms_sample_value = std::sqrt(samples[s] * samples[s]);
// Accumulate sample averages