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MP4 edit lists sometimes ask to start playback between two samples. If this happens, we currently change the timestamp of the first sample to zero to trim it (e.g. to display the first frame for a slightly shorter period of time). However, we can't do this to audio samples are they have an inherent duration and trimming them this way is not possible. #minor-release PiperOrigin-RevId: 543420218
MIDI decoder module
The MIDI module provides MidiExtractor for parsing standard MIDI files, and
MidiRenderer which uses the audio synthesization library JSyn to process
MIDI commands and render the PCM output.
Getting the module
The easiest way to get the module is to add it as a gradle dependency:
implementation 'androidx.media3:lib-decoder-midi:1.X.X'
where 1.X.X is the version, which must match the version of the other media
modules being used.
Alternatively, you can clone this GitHub project and depend on the module locally. Instructions for doing this can be found in the top level README.
The module depends on JSyn as a maven dependency from jitpack.io and you will need to define the maven repository in your build scripts. For example, add
repositories {
maven { url 'https://jitpack.io' }
}
in the build.gradle of module in your app that is using the MIDI module.
Use in the demo app
Modify the demo app's build.script file and uncomment the definition of the
jitpack.io maven repository, as well as uncomment the dependency to the MIDI
module in the dependencies section.