Initial check-in for xml-based encoder capabilities retrieval
- Changed the Java API as suggested - Treat /etc/media_profiles.xml as the default xml configurtion file
This commit is contained in:
James Dong
164
media/java/android/media/EncoderCapabilities.java
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164
media/java/android/media/EncoderCapabilities.java
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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.media;
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import java.util.List;
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import java.util.ArrayList;
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import android.util.Log;
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/**
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* The EncoderCapabilities class is used to retrieve the
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* capabilities for different video and audio
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* encoders supported on a specific Android platform.
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* {@hide}
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*/
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public class EncoderCapabilities
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{
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private static final String TAG = "EncoderCapabilities";
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/**
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* The VideoEncoderCap class represents a video encoder's
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* supported parameter range in:
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*
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* <ul>
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* <li>Resolution: the frame size (width/height) in pixels;
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* <li>Bit rate: the compressed output bit rate in bits per second;
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* <li>Frame rate: the output number of frames per second.
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* </ul>
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*
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*/
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static public class VideoEncoderCap {
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// These are not modifiable externally, thus are public accessible
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public final int mCodec; // @see android.media.MediaRecorder.VideoEncoder
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public final int mMinBitRate, mMaxBitRate; // min and max bit rate (bps)
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public final int mMinFrameRate, mMaxFrameRate; // min and max frame rate (fps)
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public final int mMinFrameWidth, mMaxFrameWidth; // min and max frame width (pixel)
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public final int mMinFrameHeight, mMaxFrameHeight; // minn and max frame height (pixel)
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// Private constructor called by JNI
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private VideoEncoderCap(int codec,
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int minBitRate, int maxBitRate,
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int minFrameRate, int maxFrameRate,
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int minFrameWidth, int maxFrameWidth,
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int minFrameHeight, int maxFrameHeight) {
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mCodec = codec;
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mMinBitRate = minBitRate;
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mMaxBitRate = maxBitRate;
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mMinFrameRate = minFrameRate;
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mMaxFrameRate = maxFrameRate;
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mMinFrameWidth = minFrameWidth;
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mMaxFrameWidth = maxFrameWidth;
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mMinFrameHeight = minFrameHeight;
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mMaxFrameHeight = maxFrameHeight;
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}
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};
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/**
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* The AudioEncoderCap class represents an audio encoder's
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* parameter range in:
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*
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* <ul>
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* <li>Bit rate: the compressed output bit rate in bits per second;
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* <li>Sample rate: the sampling rate used for recording the audio in samples per second;
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* <li>Number of channels: the number of channels the audio is recorded.
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* </ul>
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*
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*/
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static public class AudioEncoderCap {
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// These are not modifiable externally, thus are public accessible
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public final int mCodec; // @see android.media.MediaRecorder.AudioEncoder
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public final int mMinChannels, mMaxChannels; // min and max number of channels
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public final int mMinSampleRate, mMaxSampleRate; // min and max sample rate (hz)
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public final int mMinBitRate, mMaxBitRate; // min and max bit rate (bps)
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// Private constructor called by JNI
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private AudioEncoderCap(int codec,
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int minBitRate, int maxBitRate,
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int minSampleRate, int maxSampleRate,
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int minChannels, int maxChannels) {
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mCodec = codec;
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mMinBitRate = minBitRate;
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mMaxBitRate = maxBitRate;
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mMinSampleRate = minSampleRate;
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mMaxSampleRate = maxSampleRate;
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mMinChannels = minChannels;
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mMaxChannels = maxChannels;
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}
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};
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static {
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System.loadLibrary("media_jni");
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native_init();
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}
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/**
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* Returns the array of supported output file formats.
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* @see android.media.MediaRecorder.OutputFormat
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*/
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public static int[] getOutputFileFormats() {
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int nFormats = native_get_num_file_formats();
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if (nFormats == 0) return null;
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int[] formats = new int[nFormats];
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for (int i = 0; i < nFormats; ++i) {
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formats[i] = native_get_file_format(i);
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}
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return formats;
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}
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/**
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* Returns the capabilities of the supported video encoders.
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* @see android.media.EncoderCapabilities.VideoEncoderCap
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*/
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public static List<VideoEncoderCap> getVideoEncoders() {
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int nEncoders = native_get_num_video_encoders();
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if (nEncoders == 0) return null;
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List<VideoEncoderCap> encoderList = new ArrayList<VideoEncoderCap>();
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for (int i = 0; i < nEncoders; ++i) {
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encoderList.add(native_get_video_encoder_cap(i));
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}
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return encoderList;
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}
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/**
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* Returns the capabilities of the supported audio encoders.
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* @see android.media.EncoderCapabilities.AudioEncoderCap
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*/
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public static List<AudioEncoderCap> getAudioEncoders() {
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int nEncoders = native_get_num_audio_encoders();
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if (nEncoders == 0) return null;
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List<AudioEncoderCap> encoderList = new ArrayList<AudioEncoderCap>();
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for (int i = 0; i < nEncoders; ++i) {
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encoderList.add(native_get_audio_encoder_cap(i));
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}
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return encoderList;
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}
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private EncoderCapabilities() {} // Don't call me
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// Implemented by JNI
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private static native final void native_init();
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private static native final int native_get_num_file_formats();
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private static native final int native_get_file_format(int index);
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private static native final int native_get_num_video_encoders();
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private static native final VideoEncoderCap native_get_video_encoder_cap(int index);
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private static native final int native_get_num_audio_encoders();
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private static native final AudioEncoderCap native_get_audio_encoder_cap(int index);
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}
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