Codec

abstract Format getConfigurationFormat()

Returns the Format used for configuring the Codec.

The configuration Format is the input Format used by the DecoderFactory or output Format used by the EncoderFactory for selecting and configuring the underlying decoder or encoder.

abstract Format getInputFormat()

Returns the Format accepted by the codec.

This format may differ from the Format returned by getConfigurationFormat, depending on the underlying codec and configuration format requested.

abstract Surface getInputSurface()

Returns the input Surface of an underlying video encoder.

This method must only be called on video encoders because audio/video decoders and audio encoders don't use a Surface as input.

default int getMaxPendingFrameCount()

Returns the maximum number of frames that may be pending in the output Codec at a time, or 5 as a default value.

abstract String getName()

Returns the name of the underlying codec.

abstract @Nullable ByteBuffer getOutputBuffer()

Returns the current output ByteBuffer, or null if unavailable.

This method must not be called on video decoders because they must output to a Surface.

abstract @Nullable MediaCodec.BufferInfo getOutputBufferInfo()

Returns the BufferInfo associated with the current output buffer, or null if there is no output buffer available.

This method returns null if and only if getOutputBuffer returns null.

abstract @Nullable Format getOutputFormat()

Returns the current output format, or null if unavailable.

abstract boolean isEnded()

Returns whether the Codec's output stream has ended, and no more data can be dequeued.

abstract boolean maybeDequeueInputBuffer(DecoderInputBuffer inputBuffer)

Dequeues a writable input buffer, if available.

This method must not be called from video encoders because they must use a Surface to receive input.

abstract void queueInputBuffer(DecoderInputBuffer inputBuffer)

Queues an input buffer to the Codec. No buffers may be queued after end of stream buffer has been queued.

This method must not be called from video encoders because they must use a Surface to receive input.

abstract void release()

Releases the Codec.

abstract void releaseOutputBuffer(boolean render)

Releases the current output buffer.

Only set render to true when the Codec is a video decoder. Setting render to true will first render the buffer to the output surface. In this case, the surface will release the buffer back to the Codec once it is no longer used/displayed.

This should be called after the buffer has been processed. The next output buffer will not be available until the current output buffer has been released.

Calling this method with render set to true is equivalent to calling releaseOutputBuffer with the presentation timestamp of the output buffer info.

abstract void releaseOutputBuffer(long renderPresentationTimeUs)

Renders and releases the current output buffer.

This method must only be called on video decoders.

This method will first render the buffer to the output surface. The surface will then release the buffer back to the Codec once it is no longer used/displayed.

This should be called after the buffer has been processed. The next output buffer will not be available until the current output buffer has been released.

abstract void signalEndOfInputStream()

Signals end-of-stream on input to a video encoder.

This method must only be called on video encoders because they must use a Surface as input. For audio/video decoders or audio encoders, the BUFFER_FLAG_END_OF_STREAM flag should be set on the last input buffer queued.