/**
* Checks the video file to see if the contents match our expectations. We decode the
* video to a Surface and check the pixels with GL.
*/
private void checkVideoFile(VideoChunks inputData)
{
OutputSurface surface = null;
MediaCodec decoder = null;
mLargestColorDelta = -1;
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "checkVideoFile");
}
try {
surface = new OutputSurface(mWidth, mHeight);
MediaFormat format = inputData.getMediaFormat();
decoder = MediaCodec.CreateDecoderByType(MIME_TYPE);
decoder.Configure(format, surface.Surface, null, 0);
decoder.Start();
int badFrames = checkVideoData(inputData, decoder, surface);
if (badFrames != 0)
{
fail("Found " + badFrames + " bad frames");
}
} finally {
if (surface != null)
{
surface.Release();
}
if (decoder != null)
{
decoder.Stop();
decoder.Release();
}
Log.Info(TAG, "Largest color delta: " + mLargestColorDelta);
}
}
/**
* Edits a video file, saving the contents to a new file. This involves decoding and
* re-encoding, not to mention conversions between YUV and RGB, and so may be lossy.
* <p>
* If we recognize the decoded format we can do this in Java code using the ByteBuffer[]
* output, but it's not practical to support all OEM formats. By using a SurfaceTexture
* for output and a Surface for input, we can avoid issues with obscure formats and can
* use a fragment shader to do transformations.
*/
private VideoChunks editVideoFile(VideoChunks inputData)
{
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "editVideoFile " + mWidth + "x" + mHeight);
}
VideoChunks outputData = new VideoChunks();
MediaCodec decoder = null;
MediaCodec encoder = null;
InputSurface inputSurface = null;
OutputSurface outputSurface = null;
try {
MediaFormat inputFormat = inputData.getMediaFormat();
// Create an encoder format that matches the input format. (Might be able to just
// re-use the format used to generate the video, since we want it to be the same.)
MediaFormat outputFormat = MediaFormat.CreateVideoFormat(MIME_TYPE, mWidth, mHeight);
outputFormat.SetInteger(MediaFormat.KeyColorFormat, (int)MediaCodecInfo.CodecCapabilities.COLORFormatSurface);
outputFormat.SetInteger(MediaFormat.KeyBitRate, inputFormat.GetInteger(MediaFormat.KeyBitRate));
outputFormat.SetInteger(MediaFormat.KeyFrameRate, inputFormat.GetInteger(MediaFormat.KeyFrameRate));
outputFormat.SetInteger(MediaFormat.KeyIFrameInterval, inputFormat.GetInteger(MediaFormat.KeyIFrameInterval));
outputData.setMediaFormat(outputFormat);
encoder = MediaCodec.CreateEncoderByType(MIME_TYPE);
encoder.Configure(outputFormat, null, null, MediaCodecConfigFlags.Encode);
inputSurface = new InputSurface(encoder.CreateInputSurface());
inputSurface.MakeCurrent();
encoder.Start();
// OutputSurface uses the EGL context created by InputSurface.
decoder = MediaCodec.CreateDecoderByType(MIME_TYPE);
outputSurface = new OutputSurface();
outputSurface.ChangeFragmentShader(FRAGMENT_SHADER);
decoder.Configure(inputFormat, outputSurface.Surface, null, 0);
decoder.Start();
editVideoData(inputData, decoder, outputSurface, inputSurface, encoder, outputData);
} finally {
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "shutting down encoder, decoder");
}
if (outputSurface != null)
{
outputSurface.Release();
}
if (inputSurface != null)
{
inputSurface.Release();
}
if (encoder != null)
{
encoder.Stop();
encoder.Release();
}
if (decoder != null)
{
decoder.Stop();
decoder.Release();
}
}
return(outputData);
}
/**
* Releases the SurfaceTexture.
*/
private void releaseSurfaceTexture()
{
if (_outputSurface != null)
{
_outputSurface.Release();
_outputSurface = null;
}
}
/**
* Configures WeakSurfaceTexture for camera preview. Initializes mStManager, and sets the
* associated WeakSurfaceTexture as the Camera's "preview texture".
* <p>
* Configure the EGL surface that will be used for output before calling here.
*/
private void prepareWeakSurfaceTexture()
{
_outputSurface = new OutputSurface();
try {
_mediaPlayer.SetSurface(_outputSurface.Surface);
} catch (System.Exception e) {
throw new System.Exception("setPreviewTexture failed:" + e.Message);
}
}
/**
* Configures SurfaceTexture for camera preview. Initializes mStManager, and sets the
* associated SurfaceTexture as the Camera's "preview texture".
* <p>
* Configure the EGL surface that will be used for output before calling here.
*/
private void prepareSurfaceTexture()
{
_outputSurface = new OutputSurface();
var st = _outputSurface.SurfaceTexture;
try {
_camera.SetPreviewTexture(st);
} catch (System.Exception e) {
throw new System.Exception("setPreviewTexture failed:" + e.Message);
}
}
/**
* Checks the video data.
*
* @return the number of bad frames
*/
private int checkVideoData(VideoChunks inputData, MediaCodec decoder, OutputSurface surface)
{
const int TIMEOUT_USEC = 1000;
ByteBuffer[] decoderInputBuffers = decoder.GetInputBuffers();
ByteBuffer[] decoderOutputBuffers = decoder.GetOutputBuffers();
MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
int inputChunk = 0;
int checkIndex = 0;
int badFrames = 0;
bool outputDone = false;
bool inputDone = false;
while (!outputDone)
{
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "check loop");
}
// Feed more data to the decoder.
if (!inputDone)
{
int inputBufIndex = decoder.DequeueInputBuffer(TIMEOUT_USEC);
if (inputBufIndex >= 0)
{
if (inputChunk == inputData.NumChunks)
{
// End of stream -- send empty frame with EOS flag set.
decoder.QueueInputBuffer(inputBufIndex, 0, 0, 0L,
MediaCodec.BufferFlagEndOfStream);
inputDone = true;
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "sent input EOS");
}
}
else
{
// Copy a chunk of input to the decoder. The first chunk should have
// the BUFFER_FLAG_CODEC_CONFIG flag set.
ByteBuffer inputBuf = decoderInputBuffers[inputBufIndex];
inputBuf.Clear();
inputData.getChunkData(inputChunk, inputBuf);
int flags = inputData.getChunkFlags(inputChunk);
long time = inputData.getChunkTime(inputChunk);
decoder.QueueInputBuffer(inputBufIndex, 0, inputBuf.Position(),
time, (MediaCodecBufferFlags)flags);
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "submitted frame " + inputChunk + " to dec, size=" +
inputBuf.Position() + " flags=" + flags);
}
inputChunk++;
}
}
else
{
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "input buffer not available");
}
}
}
if (!outputDone)
{
int decoderStatus = decoder.DequeueOutputBuffer(info, TIMEOUT_USEC);
if (decoderStatus == (int)MediaCodec.InfoTryAgainLater)
{
// no output available yet
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "no output from decoder available");
}
}
else if (decoderStatus == (int)MediaCodec.InfoOutputBuffersChanged)
{
decoderOutputBuffers = decoder.GetOutputBuffers();
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "decoder output buffers changed");
}
}
else if (decoderStatus == (int)MediaCodec.InfoOutputFormatChanged)
{
MediaFormat newFormat = decoder.OutputFormat;
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "decoder output format changed: " + newFormat);
}
}
else if (decoderStatus < 0)
{
fail("unexpected result from decoder.dequeueOutputBuffer: " + decoderStatus);
}
else // decoderStatus >= 0
{
ByteBuffer decodedData = decoderOutputBuffers[decoderStatus];
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "surface decoder given buffer " + decoderStatus +
" (size=" + info.Size + ")");
}
if ((info.Flags & MediaCodec.BufferFlagEndOfStream) != 0)
{
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "output EOS");
}
outputDone = true;
}
bool doRender = (info.Size != 0);
// As soon as we call releaseOutputBuffer, the buffer will be forwarded
// to SurfaceTexture to convert to a texture. The API doesn't guarantee
// that the texture will be available before the call returns, so we
// need to wait for the onFrameAvailable callback to fire.
decoder.ReleaseOutputBuffer(decoderStatus, doRender);
if (doRender)
{
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "awaiting frame " + checkIndex);
}
assertEquals("Wrong time stamp", computePresentationTime(checkIndex),
info.PresentationTimeUs);
surface.AwaitNewImage();
surface.DrawImage();
if (!checkSurfaceFrame(checkIndex++))
{
badFrames++;
}
}
}
}
}
return(badFrames);
}
/**
* Edits a stream of video data.
*/
private void editVideoData(VideoChunks inputData, MediaCodec decoder,
OutputSurface outputSurface, InputSurface inputSurface, MediaCodec encoder,
VideoChunks outputData)
{
const int TIMEOUT_USEC = 10000;
ByteBuffer[] decoderInputBuffers = decoder.GetInputBuffers();
ByteBuffer[] encoderOutputBuffers = encoder.GetOutputBuffers();
MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
int inputChunk = 0;
int outputCount = 0;
bool outputDone = false;
bool inputDone = false;
bool decoderDone = false;
while (!outputDone)
{
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "edit loop");
}
// Feed more data to the decoder.
if (!inputDone)
{
int inputBufIndex = decoder.DequeueInputBuffer(TIMEOUT_USEC);
if (inputBufIndex >= 0)
{
if (inputChunk == inputData.NumChunks)
{
// End of stream -- send empty frame with EOS flag set.
decoder.QueueInputBuffer(inputBufIndex, 0, 0, 0L,
MediaCodecBufferFlags.EndOfStream);
inputDone = true;
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "sent input EOS (with zero-length frame)");
}
}
else
{
// Copy a chunk of input to the decoder. The first chunk should have
// the BUFFER_FLAG_CODEC_CONFIG flag set.
ByteBuffer inputBuf = decoderInputBuffers[inputBufIndex];
inputBuf.Clear();
inputData.getChunkData(inputChunk, inputBuf);
int flags = inputData.getChunkFlags(inputChunk);
long time = inputData.getChunkTime(inputChunk);
decoder.QueueInputBuffer(inputBufIndex, 0, inputBuf.Position(),
time, (MediaCodecBufferFlags)flags); // TODO: Not sure if it's MediaCodecBufferFlags, verify.
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "submitted frame " + inputChunk + " to dec, size=" +
inputBuf.Position() + " flags=" + flags);
}
inputChunk++;
}
}
else
{
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "input buffer not available");
}
}
}
// Assume output is available. Loop until both assumptions are false.
bool decoderOutputAvailable = !decoderDone;
bool encoderOutputAvailable = true;
while (decoderOutputAvailable || encoderOutputAvailable)
{
// Start by draining any pending output from the encoder. It's important to
// do this before we try to stuff any more data in.
int encoderStatus = encoder.DequeueOutputBuffer(info, TIMEOUT_USEC);
if (encoderStatus == (int)MediaCodecInfoState.TryAgainLater)
{
// no output available yet
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "no output from encoder available");
}
encoderOutputAvailable = false;
}
else if (encoderStatus == (int)MediaCodecInfoState.OutputBuffersChanged)
{
encoderOutputBuffers = encoder.GetOutputBuffers();
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "encoder output buffers changed");
}
}
else if (encoderStatus == (int)MediaCodecInfoState.OutputFormatChanged)
{
MediaFormat newFormat = encoder.OutputFormat;
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "encoder output format changed: " + newFormat);
}
}
else if (encoderStatus < 0)
{
fail("unexpected result from encoder.dequeueOutputBuffer: " + encoderStatus);
}
else // encoderStatus >= 0
{
ByteBuffer encodedData = encoderOutputBuffers[encoderStatus];
if (encodedData == null)
{
fail("encoderOutputBuffer " + encoderStatus + " was null");
}
// Write the data to the output "file".
if (info.Size != 0)
{
encodedData.Position(info.Offset);
encodedData.Limit(info.Offset + info.Size);
outputData.addChunk(encodedData, (int)info.Flags, info.PresentationTimeUs);
outputCount++;
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "encoder output " + info.Size + " bytes");
}
}
outputDone = (info.Flags & MediaCodec.BufferFlagEndOfStream) != 0;
encoder.ReleaseOutputBuffer(encoderStatus, false);
}
if (encoderStatus != (int)MediaCodec.InfoTryAgainLater)
{
// Continue attempts to drain output.
continue;
}
// Encoder is drained, check to see if we've got a new frame of output from
// the decoder. (The output is going to a Surface, rather than a ByteBuffer,
// but we still get information through BufferInfo.)
if (!decoderDone)
{
int decoderStatus = decoder.DequeueOutputBuffer(info, TIMEOUT_USEC);
if (decoderStatus == (int)MediaCodec.InfoTryAgainLater)
{
// no output available yet
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "no output from decoder available");
}
decoderOutputAvailable = false;
}
else if (decoderStatus == (int)MediaCodec.InfoOutputBuffersChanged)
{
//decoderOutputBuffers = decoder.getOutputBuffers();
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "decoder output buffers changed (we don't care)");
}
}
else if (decoderStatus == (int)MediaCodec.InfoOutputFormatChanged)
{
// expected before first buffer of data
MediaFormat newFormat = decoder.OutputFormat;
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "decoder output format changed: " + newFormat);
}
}
else if (decoderStatus < 0)
{
fail("unexpected result from decoder.dequeueOutputBuffer: " + decoderStatus);
}
else // decoderStatus >= 0
{
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "surface decoder given buffer " + decoderStatus + " (size=" + info.Size + "(");
}
// The ByteBuffers are null references, but we still get a nonzero
// size for the decoded data.
bool doRender = (info.Size != 0);
// As soon as we call releaseOutputBuffer, the buffer will be forwarded
// to SurfaceTexture to convert to a texture. The API doesn't
// guarantee that the texture will be available before the call
// returns, so we need to wait for the onFrameAvailable callback to
// fire. If we don't wait, we risk rendering from the previous frame.
decoder.ReleaseOutputBuffer(decoderStatus, doRender);
if (doRender)
{
// This waits for the image and renders it after it arrives.
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "awaiting frame");
}
outputSurface.AwaitNewImage();
outputSurface.DrawImage();
// Send it to the encoder.
inputSurface.SetPresentationTime(info.PresentationTimeUs * 1000);
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "swapBuffers");
}
inputSurface.SwapBuffers();
}
if ((info.Flags & MediaCodec.BufferFlagEndOfStream) != 0)
{
// forward decoder EOS to encoder
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "signaling input EOS");
}
if (WORK_AROUND_BUGS)
{
// Bail early, possibly dropping a frame.
return;
}
else
{
encoder.SignalEndOfInputStream();
}
}
}
}
}
}
if (inputChunk != outputCount)
{
throw new RuntimeException("frame lost: " + inputChunk + " in, " +
outputCount + " out");
}
}
