1package eu.siacs.conversations.utils;
 2
 3import android.media.MediaCodecInfo;
 4import android.media.MediaFormat;
 5import android.util.Log;
 6
 7import net.ypresto.androidtranscoder.format.MediaFormatExtraConstants;
 8import net.ypresto.androidtranscoder.format.MediaFormatStrategy;
 9import net.ypresto.androidtranscoder.format.OutputFormatUnavailableException;
10
11import eu.siacs.conversations.Config;
12
13public class Android360pFormatStrategy implements MediaFormatStrategy {
14
15    private static final int LONGER_LENGTH = 640;
16    private static final int SHORTER_LENGTH = 360;
17    private static final int DEFAULT_VIDEO_BITRATE = 1000 * 1000;
18    private static final int DEFAULT_AUDIO_BITRATE = 128 * 1000;
19    private final int mVideoBitrate;
20    private final int mAudioBitrate;
21    private final int mAudioChannels;
22
23    public Android360pFormatStrategy() {
24        mVideoBitrate = DEFAULT_VIDEO_BITRATE;
25        mAudioBitrate = DEFAULT_AUDIO_BITRATE;
26        mAudioChannels = 2;
27    }
28
29    @Override
30    public MediaFormat createVideoOutputFormat(MediaFormat inputFormat) {
31        int width = inputFormat.getInteger(MediaFormat.KEY_WIDTH);
32        int height = inputFormat.getInteger(MediaFormat.KEY_HEIGHT);
33        int longer, shorter, outWidth, outHeight;
34        if (width >= height) {
35            longer = width;
36            shorter = height;
37            outWidth = LONGER_LENGTH;
38            outHeight = SHORTER_LENGTH;
39        } else {
40            shorter = width;
41            longer = height;
42            outWidth = SHORTER_LENGTH;
43            outHeight = LONGER_LENGTH;
44        }
45        if (longer * 9 != shorter * 16) {
46            throw new OutputFormatUnavailableException("This video is not 16:9, and is not able to transcode. (" + width + "x" + height + ")");
47        }
48        if (shorter <= SHORTER_LENGTH) {
49            Log.d(Config.LOGTAG, "This video is less or equal to 360p, pass-through. (" + width + "x" + height + ")");
50            return null;
51        }
52        MediaFormat format = MediaFormat.createVideoFormat("video/avc", outWidth, outHeight);
53        // From Nexus 4 Camera in 720p
54        format.setInteger(MediaFormat.KEY_BIT_RATE, mVideoBitrate);
55        format.setInteger(MediaFormat.KEY_FRAME_RATE, 30);
56        format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 3);
57        format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
58        return format;
59    }
60
61    @Override
62    public MediaFormat createAudioOutputFormat(MediaFormat inputFormat) {
63        final MediaFormat format = MediaFormat.createAudioFormat(MediaFormatExtraConstants.MIMETYPE_AUDIO_AAC, inputFormat.getInteger(MediaFormat.KEY_SAMPLE_RATE), mAudioChannels);
64        format.setInteger(MediaFormat.KEY_AAC_PROFILE, MediaCodecInfo.CodecProfileLevel.AACObjectLC);
65        format.setInteger(MediaFormat.KEY_BIT_RATE, mAudioBitrate);
66        return format;
67    }
68
69}