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/*
* Copyright (C) 2014 Yuya Tanaka
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.ypresto.androidtranscoder.format;
import android.media.MediaCodecInfo;
import android.media.MediaFormat;
import android.util.Log;
class Android720pFormatStrategy implements MediaFormatStrategy {
public static final int AUDIO_BITRATE_AS_IS = -1;
public static final int AUDIO_CHANNELS_AS_IS = -1;
private static final String TAG = "720pFormatStrategy";
private static final int LONGER_LENGTH = 1280;
private static final int SHORTER_LENGTH = 720;
private static final int DEFAULT_VIDEO_BITRATE = 8000 * 1000; // From Nexus 4 Camera in 720p
private final int mVideoBitrate;
private final int mAudioBitrate;
private final int mAudioChannels;
public Android720pFormatStrategy() {
this(DEFAULT_VIDEO_BITRATE);
}
public Android720pFormatStrategy(int videoBitrate) {
this(videoBitrate, AUDIO_BITRATE_AS_IS, AUDIO_CHANNELS_AS_IS);
}
public Android720pFormatStrategy(int videoBitrate, int audioBitrate, int audioChannels) {
mVideoBitrate = videoBitrate;
mAudioBitrate = audioBitrate;
mAudioChannels = audioChannels;
}
@Override
public MediaFormat createVideoOutputFormat(MediaFormat inputFormat) {
int width = inputFormat.getInteger(MediaFormat.KEY_WIDTH);
int height = inputFormat.getInteger(MediaFormat.KEY_HEIGHT);
int longer, shorter, outWidth, outHeight;
if (width >= height) {
longer = width;
shorter = height;
outWidth = LONGER_LENGTH;
outHeight = SHORTER_LENGTH;
} else {
shorter = width;
longer = height;
outWidth = SHORTER_LENGTH;
outHeight = LONGER_LENGTH;
}
if (longer * 9 != shorter * 16) {
throw new OutputFormatUnavailableException("This video is not 16:9, and is not able to transcode. (" + width + "x" + height + ")");
}
if (shorter <= SHORTER_LENGTH) {
Log.d(TAG, "This video is less or equal to 720p, pass-through. (" + width + "x" + height + ")");
return null;
}
MediaFormat format = MediaFormat.createVideoFormat("video/avc", outWidth, outHeight);
// From Nexus 4 Camera in 720p
format.setInteger(MediaFormat.KEY_BIT_RATE, mVideoBitrate);
format.setInteger(MediaFormat.KEY_FRAME_RATE, 30);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 3);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
return format;
}
@Override
public MediaFormat createAudioOutputFormat(MediaFormat inputFormat) {
if (mAudioBitrate == AUDIO_BITRATE_AS_IS || mAudioChannels == AUDIO_CHANNELS_AS_IS) return null;
// Use original sample rate, as resampling is not supported yet.
final MediaFormat format = MediaFormat.createAudioFormat(MediaFormatExtraConstants.MIMETYPE_AUDIO_AAC,
inputFormat.getInteger(MediaFormat.KEY_SAMPLE_RATE), mAudioChannels);
format.setInteger(MediaFormat.KEY_AAC_PROFILE, MediaCodecInfo.CodecProfileLevel.AACObjectLC);
format.setInteger(MediaFormat.KEY_BIT_RATE, mAudioBitrate);
return format;
}
}
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