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Commit 9a6de33b authored by Phil Burk's avatar Phil Burk Committed by android-build-merger
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Merge "Audio ENCODING_IEC61937: enforce use of CHANNEL_OUT_STEREO" into nyc-dev 

am: 566e7212

* commit '566e7212':
  Audio ENCODING_IEC61937: enforce use of CHANNEL_OUT_STEREO
parents 61ae04ff 566e7212

media/java/android/media/AudioFormat.java

+5 −0
Original line number Diff line number Diff line
@@ -256,6 +256,11 @@ public final class AudioFormat implements Parcelable { 
    public static final int ENCODING_AAC_HE_V2 = 12;

    /** Audio data format: compressed audio wrapped in PCM for HDMI

     * or S/PDIF passthrough.

     * IEC61937 uses a stereo stream of 16-bit samples as the wrapper.

     * So the channel mask for the track must be {@link #CHANNEL_OUT_STEREO}.

     * Data should be written to the stream in a short[] array.

     * If the data is written in a byte[] array then there may be endian problems

     * on some platforms when converting to short internally.

     */

    public static final int ENCODING_IEC61937 = 13;

media/java/android/media/AudioTrack.java

+9 −0
Original line number Diff line number Diff line
@@ -806,6 +806,15 @@ public class AudioTrack implements AudioRouting 
        }

        mSampleRate = sampleRateInHz;



        // IEC61937 is based on stereo. We could coerce it to stereo.

        // But the application needs to know the stream is stereo so that

        // it is encoded and played correctly. So better to just reject it.

        if (audioFormat == AudioFormat.ENCODING_IEC61937

                && channelConfig != AudioFormat.CHANNEL_OUT_STEREO) {

            throw new IllegalArgumentException(

                    "ENCODING_IEC61937 must be configured as CHANNEL_OUT_STEREO");

        }



        //--------------

        // channel config

        mChannelConfiguration = channelConfig;