Cannot compile jpcsp

[sum2012]

I reinstall with
Java SE Development Kit 7u65

Code:

[javac] E:\JPCSPSource\src\jpcsp\GUI\UmdVideoPlayer.java:533: error: method open in class IStreamCoder cannot be applied to given types;
    [javac]         if (videoCoder != null && videoCoder.open(null, null) < 0) {
    [javac]                                             ^
    [javac]   required: no arguments
    [javac]   found: <null>,<null>
    [javac]   reason: actual and formal argument lists differ in length
    [javac] E:\JPCSPSource\src\jpcsp\GUI\UmdVideoPlayer.java:537: error: method open in class IStreamCoder cannot be applied to given types;
    [javac]         if (audioCoder != null && audioCoder.open(null, null) < 0) {
    [javac]                                             ^
    [javac]   required: no arguments
    [javac]   found: <null>,<null>
    [javac]   reason: actual and formal argument lists differ in length
    [javac] E:\JPCSPSource\src\jpcsp\media\MediaEngine.java:133: error: method open in class IStreamCoder cannot be applied to given types;
    [javac]             return streamCoder.open(null, null);
    [javac]                               ^
    [javac]   required: no arguments
    [javac]   found: <null>,<null>
    [javac]   reason: actual and formal argument lists differ in length
    [javac] E:\JPCSPSource\src\jpcsp\media\MediaEngine.java:997: error: cannot find symbol
    [javac]         audioResampler.swresample(resampleSamples, samples, samplesSize);
    [javac]                       ^
    [javac]   symbol:   method swresample(IAudioSamples,IAudioSamples,int)
    [javac]   location: variable audioResampler of type IAudioResampler
    [javac] E:\JPCSPSource\src\jpcsp\media\MediaEngine.java:1034: error: cannot find symbol
    [javac]         if (samples.getFormat() == IAudioSamples.Format.FMT_FLTP) {
    [javac]                                                        ^
    [javac]   symbol:   variable FMT_FLTP
    [javac]   location: class Format
    [javac] E:\JPCSPSource\src\jpcsp\GUI\UmdBrowserPmf.java:213: error: cannot find symbol
    [javac]             if (audioCoder.getSampleFormat() == IAudioSamples.Format.FMT_FLTP) {
    [javac]                                                                     ^
    [javac]   symbol:   variable FMT_FLTP
    [javac]   location: class Format
    [javac] E:\JPCSPSource\src\jpcsp\GUI\UmdBrowserPmf.java:416: error: cannot find symbol
    [javac]                             if (audioResampler.swresample(newSamples, samples, samplesSize) < 0) {
    [javac]                                               ^
    [javac]   symbol:   method swresample(IAudioSamples,IAudioSamples,int)
    [javac]   location: variable audioResampler of type IAudioResampler