中国科学技术大学电子工程与信息科学系©2018 The AudioRecord class manages the audio resources AudioRecord for Java applications to record audio from the audio input hardware of the platform. Structure that groups a position in frame units AudioTimestamp relative to an assumed audio stream,together with the estimated time when that frame was presented or is committed to be presented. AudioTrack The AudioTrack class manages and plays a single audio resource for Java applications FaceDetector Identifies the faces of people in a Bitmap graphic object. FaceDetector.Face A Face contains all the information identifying the location of a face in a bitmap. A single complete image buffer to use with a media Image source such as a MediaCodec. The ImageReader class allows direct application access to image data rendered into a Surface ImageReader Several Android media API classes accept Surface objects as targets to render to,including MediaPlayer,MediaCodec,and RenderScript Allocations. MediaCodec MediaCodec class can be used to access low-level media codec,i.e. MediaCrypto MediaCrypto class can be used in conjunction with MediaCodec to decode encrypted media data. MediaFormat Encapsulates the information describing the format of media data,be it audio or video. MediaMuxer MediaMuxer facilitates muxing elementary streams. MediaRecorder Used to record audio and video. MediaRecorder.AudioEncoder Defines the audio encoding. MediaRecorder.AudioSource Defines the audio source. MediaRecorder.OutputFormat Defines the output format. MediaRecorder.VideoEncoder Defines the video encoding MediaRecorder.VideoSource Defines the video source. MediaRouter allows applications to control the MediaRouter routing of media channels and streams from the current device to external speakers and destination devices. Ringtone provides a quick method for playing a Ringtone ringtone,notification,or other similar types of sounds. SoundPool The SoundPool class manages and plays audio resources for applications. 2、WAVE文件格式 WAVE(*.WAV文件)是Microsoft开发的一种音频文件格式，它符合RIFF文 件格式标准，RIFF全称为资源互换文件格式(Resources Interchange File Format), 是Windows下大部分多媒体文件遵循的一种文件结构。 根据RIFF规范，其基本的组成单元是chunk。[3]一个WAV文件通常有三 个chunk以及一个可选chunk,其在文件中的排列方式依次是：RIFF chunk,Format 如果您在阅读过程中发现疏漏和错误，请联系《多媒体技术基础》课程组{network,cxh}@ustc.edu.cn中国科学技术大学电子工程与信息科学系© 2018 如果您在阅读过程中发现疏漏和错误，请联系《多媒体技术基础》课程组{network,cxh}@ustc.edu.cn AudioRecord The AudioRecord class manages the audio resources for Java applications to record audio from the audio input hardware of the platform. AudioTimestamp Structure that groups a position in frame units relative to an assumed audio stream, together with the estimated time when that frame was presented or is committed to be presented. AudioTrack The AudioTrack class manages and plays a single audio resource for Java applications. FaceDetector Identifies the faces of people in a Bitmap graphic object. FaceDetector.Face A Face contains all the information identifying the location of a face in a bitmap. Image A single complete image buffer to use with a media source such as a MediaCodec. ImageReader The ImageReader class allows direct application access to image data rendered into a Surface Several Android media API classes accept Surface objects as targets to render to, including MediaPlayer, MediaCodec, and RenderScript Allocations. MediaCodec MediaCodec class can be used to access low-level media codec, i.e. MediaCrypto MediaCrypto class can be used in conjunction with MediaCodec to decode encrypted media data. MediaFormat Encapsulates the information describing the format of media data, be it audio or video. MediaMuxer MediaMuxer facilitates muxing elementary streams. MediaRecorder Used to record audio and video. MediaRecorder.AudioEncoder Defines the audio encoding. MediaRecorder.AudioSource Defines the audio source. MediaRecorder.OutputFormat Defines the output format. MediaRecorder.VideoEncoder Defines the video encoding. MediaRecorder.VideoSource Defines the video source. MediaRouter MediaRouter allows applications to control the routing of media channels and streams from the current device to external speakers and destination devices. Ringtone Ringtone provides a quick method for playing a ringtone, notification, or other similar types of sounds. SoundPool The SoundPool class manages and plays audio resources for applications. 2、WAVE 文件格式 WAVE(*.WAV 文件)是 Microsoft 开发的一种音频文件格式，它符合 RIFF 文 件格式标准。RIFF全称为资源互换文件格式（Resources Interchange File Format）， 是 Windows 下大部分多媒体文件遵循的一种文件结构。 根据 RIFF 规范，其基本的组成单元是 chunk。[3]一个 WAV 文件通常有三 个 chunk 以及一个可选 chunk，其在文件中的排列方式依次是：RIFF chunk，Format