| As a new operating system, Android system has been applied to different smart moileterminals by many Companies with Google’s supports and its opening.But its features ofmulti-media are required to be enhanced to meet various demands.In order to enhance Android multimedia system,two multimedia function extensionmethods are designed which from two aspect of sound and video. In order to achieve WMAdecoding in the Android,this paper analysises of FFmepg library,WMA file parsing anddecoding part of the code in the FFmpeg is extracted and realizing transplantation to theAndroid system, so that the Android system supports the playback of WMA files.deeplyanalyzes and researches V1decoder chip interface and hardware decoding process ofmultimedia system of Android. Finally, based on the OpenMAX standard, Design a call to V1decoder chip, and implement the hardware decode which based on the V1decoder chip.Through repeated play WMA audio files in the test machine of the Android platform, Ithas reached the expected results that the play sound is clear and tone quality is good. Basedon the V1decoder chip hardware decoding module through repeated testing in thedevelopment board It has achieved the desired results that the playing screen is smooth andclear, With the720P video files, This hardware decoding module can decode25frames persecond. |
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