java - 尝试编码数据时出现 BufferOverflowException

Question

我尝试为“audio/3gpp”创建编码器，但我的应用程序崩溃了。

我配置 MediaCodec...

    String mMime = "audio/3gpp";
    mMediaCodec = MediaCodec.createEncoderByType(mMime);
    MediaFormat mMediaFormat = MediaFormat.createAudioFormat(mMime, 44100, 1);
    mMediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, 12000);
    mMediaFormat.setInteger(MediaFormat.KEY_SAMPLE_RATE, 44100);
    mMediaFormat.setInteger(MediaFormat.KEY_CHANNEL_COUNT, 1);
    mMediaCodec.configure(mMediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
    mMediaCodec.start();

然后我尝试对数据进行编码...

private byte[] EncodeDataTo3gp(byte[] input)
{
    byte[] outData = null;

    try 
    {
        ByteBuffer[] inputBuffers = mMediaCodec.getInputBuffers();

        ByteBuffer[] outputBuffers = mMediaCodec.getOutputBuffers();
        int inputBufferIndex = mMediaCodec.dequeueInputBuffer(-1);
        if (inputBufferIndex >= 0) 
        {
            ByteBuffer inputBuffer = inputBuffers[inputBufferIndex];
            inputBuffer.clear();
            inputBuffer.put(input);
            mMediaCodec.queueInputBuffer(inputBufferIndex, 0, input.length, 0, 0);
        }

        MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();
        int outputBufferIndex = mMediaCodec.dequeueOutputBuffer(bufferInfo, 0);
        while (outputBufferIndex >= 0) 
        {
            ByteBuffer outputBuffer = outputBuffers[outputBufferIndex];
            outData = new byte[bufferInfo.size];
            outputBuffer.get(outData);

            mMediaCodec.releaseOutputBuffer(outputBufferIndex, false);
            outputBufferIndex = mMediaCodec.dequeueOutputBuffer(bufferInfo, 0);
        }
    } catch (Throwable t) {
        t.printStackTrace();
    }

    return outData;
}

但是这个函数抛出异常。当 "inputBuffer.put(input);": java.nio.BufferOverflowException

Answer 1

尝试根据input 大小将MediaFormat.KEY_MAX_INPUT_SIZE 参数添加到您的mMediaFormat。它将增加 inputBuffers 的容量。