RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-14 09:34:59 +00:00
Code Issues Activity Actions

Userland+LibAudio: Make audio applications support dynamic sample rate

Browse source 
All audio applications (aplay, Piano, Sound Player) respect the ability
of the system to have theoretically any sample rate. Therefore, they
resample their own audio into the system sample rate.

LibAudio previously had its loaders resample their own audio, even
though they expose their sample rate. This is now changed. The loaders
output audio data in their file's sample rate, which the user has to
query and resample appropriately. Resampling code from Buffer, WavLoader
and FlacLoader is removed.

Note that these applications only check the sample rate at startup,
which is reasonable (the user has to restart applications when changing
the sample rate). Fully dynamic adaptation could both lead to errors and
will require another IPC interface. This seems to be enough for now.
This commit is contained in:
kleines Filmröllchen 2021-08-19 00:13:26 +02:00 • committed by Ali Mohammad Pur
parent 9880a5c481
commit d049626f40
12 changed files with 56 additions and 41 deletions
Download patch file Download diff file Expand all files Collapse all files

5
Userland/Utilities/aplay.cpp
View file

@ -35,12 +35,17 @@ int main(int argc, char** argv)
loader->bits_per_sample(),
loader->num_channels() == 1 ? "Mono" : "Stereo");
out("\033[34;1mProgress\033[0m: \033[s");
auto resampler = Audio::ResampleHelper<double>(loader->sample_rate(), audio_client->get_sample_rate());
for (;;) {
auto samples = loader->get_more_samples();
if (samples) {
out("\033[u");
out("{}/{}", loader->loaded_samples(), loader->total_samples());
fflush(stdout);
resampler.reset();
samples = Audio::resample_buffer(resampler, *samples);
audio_client->enqueue(*samples);
} else if (loader->has_error()) {
outln();