DVDAudioCodecLPcm: Do not use AVCODEC_MAX_AUDIO_FRAME_SIZE which has been removed from FFmpeg 2.0 and dynamically allocate buffers as needed.
DVDAudioCodecPcm: Do not use AVCODEC_MAX_AUDIO_FRAME_SIZE since it is gone in FFmpeg 2.0 and dynamically allocate buffers as needed.
DVDAudioCodec(L)Pcm: Disable copying of the class.
Merge pull request #3006 from aballier/ffmpeg2

Stop using AVCODEC_MAX_AUDIO_FRAME_SIZE in (L)Pcm decoders.