ec08db458e
This change fixes a bug with seeking forward in MIDI. When seeking forward, the progressive media period attempts to seek within the sample queue, if a key-frame exists before the seeking position. With MIDI, however, we can only skip Note-On and Note-Off samples and all other samples must be sent to the MIDI decoder. When seeking outside the sample queue, the MidiExtractor already instructs the player to start from the beginning of the MIDI input. With this change, only the first output sample is a key-frame, thus the progressive media period can no longer seek within the sample queue and is forced to seek from the MIDI input start always. Issue: androidx/media#704 #minor-release PiperOrigin-RevId: 584321443
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:media3-exoplayer-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.