AudioMixer
A cross-platform audio mixer, supports Android, iOS, macOS and Windows. Powered by WebRTC, FFmpeg and Djinni.
Install
Android
allprojects {
repositories {
mavenCentral()
}
}
compile 'com.github.piasy:AudioMixer:1.0.3'iOS & macOS
Due to the file size limitation, publish with CocoaPods is difficult, so please download the prebuilt AudioMixer.framework directly.
Usage
Android
Initialize:
AudioMixer.globalInitialize();Create mixer:
AudioMixer mixer = new AudioMixer(new MixerConfig(
new ArrayList<>(Arrays.asList(
new MixerSource(MixerSource.TYPE_FILE, 1, 1,
"/sdcard/mp3/morning.mp3", 0, 0),
new MixerSource(MixerSource.TYPE_RECORD, 2, 1, "", sampleRate,
channelNum)
)),
sampleRate, channelNum, frameDurationMs
));Do mix with recorded data:
mixer.addRecordedData(2, buf, size);Do mix with file only:
AudioBuffer buffer = mixer.mix();Use the mixed audio data:
if (buffer.getSize() > 0) {
audioTrack.write(buffer.getBuffer(), 0, buffer.getSize());
}For more detailed info, please refer to the source code.
iOS & macOS
Initialize:
#import <AudioMixer/AudioMixer.h>
[PYAAudioMixer globalInitializeFFmpeg];Create mixer:
#import <AudioMixer/AudioMixer.h>
NSArray* mixerSources = @[
[PYAMixerSource
mixerSourceWithType:PYAMixerSourceTypeFile
ssrc:1
volume:1
path:[self pathForFileName:@"morning.mp3"]
sampleRate:0
channelNum:0],
[PYAMixerSource mixerSourceWithType:PYAMixerSourceTypeRecord
ssrc:2
volume:1
path:@""
sampleRate:_sampleRate
channelNum:_channelNum],
];
PYAMixerConfig* config = [PYAMixerConfig mixerConfigWithSources:mixerSources
outputSampleRate:_sampleRate
outputChannelNum:_channelNum
frameDurationMs:10];
_mixer = [[PYAAudioMixer alloc] initWithConfig:config];Do mix with recorded data:
[_mixer addRecordedData:2 data:_buffer size:mixerInputSize];
_mixedBuffer = [_mixer mix];Do mix with file only:
_mixedBuffer = [_mixer mix];Use the mixed audio data:
if (_mixedBuffer.size > 0) {
write([_recordAndMixDumper fileDescriptor], _mixedBuffer.data,
_mixedBuffer.size);
}For more detailed info, please refer to the source code.
Dependencies
- FFmpeg: 3.4.2
- WebRTC: #23794
Development
- Before run Android demo, push mp3 to sdcard:
adb push mp3 /sdcard/ - Generate sources:
./run_djinni.sh - Extract libs:
./extract_libs.sh
Caveat
- Due to the limitation of WebRTC,
frameDurationMsmust be 10ms, and we must mix 10ms's audio data each time;
TODO
- ffmpeg 4.0 audio decoder doesn't work
- iOS
- macOS
- Windows