| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.media.cts; |
| |
| import android.media.MediaCodec; |
| import android.media.MediaCodecInfo; |
| import android.media.MediaCodecList; |
| import android.media.MediaFormat; |
| import android.opengl.GLES20; |
| import android.test.AndroidTestCase; |
| import android.util.Log; |
| |
| import java.io.BufferedOutputStream; |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| |
| |
| /** |
| * This test has three steps: |
| * <ol> |
| * <li>Generate a video test stream. |
| * <li>Decode the video from the stream, rendering frames into a SurfaceTexture. |
| * Render the texture onto a Surface that feeds a video encoder, modifying |
| * the output with a fragment shader. |
| * <li>Decode the second video and compare it to the expected result. |
| * </ol><p> |
| * The second step is a typical scenario for video editing. We could do all this in one |
| * step, feeding data through multiple stages of MediaCodec, but at some point we're |
| * no longer exercising the code in the way we expect it to be used (and the code |
| * gets a bit unwieldy). |
| */ |
| public class DecodeEditEncodeTest extends AndroidTestCase { |
| private static final String TAG = "DecodeEditEncode"; |
| private static final boolean WORK_AROUND_BUGS = false; // avoid fatal codec bugs |
| private static final boolean VERBOSE = false; // lots of logging |
| private static final boolean DEBUG_SAVE_FILE = false; // save copy of encoded movie |
| |
| // parameters for the encoder |
| // H.264 Advanced Video Coding |
| private static final String MIME_TYPE = MediaFormat.MIMETYPE_VIDEO_AVC; |
| private static final int FRAME_RATE = 15; // 15fps |
| private static final int IFRAME_INTERVAL = 10; // 10 seconds between I-frames |
| |
| // movie length, in frames |
| private static final int NUM_FRAMES = 30; // two seconds of video |
| |
| private static final int TEST_R0 = 0; // dull green background |
| private static final int TEST_G0 = 136; |
| private static final int TEST_B0 = 0; |
| private static final int TEST_R1 = 236; // pink; BT.601 YUV {120,160,200} |
| private static final int TEST_G1 = 50; |
| private static final int TEST_B1 = 186; |
| |
| // Replaces TextureRender.FRAGMENT_SHADER during edit; swaps green and blue channels. |
| private static final String FRAGMENT_SHADER = |
| "#extension GL_OES_EGL_image_external : require\n" + |
| "precision mediump float;\n" + |
| "varying vec2 vTextureCoord;\n" + |
| "uniform samplerExternalOES sTexture;\n" + |
| "void main() {\n" + |
| " gl_FragColor = texture2D(sTexture, vTextureCoord).rbga;\n" + |
| "}\n"; |
| |
| // size of a frame, in pixels |
| private int mWidth = -1; |
| private int mHeight = -1; |
| // bit rate, in bits per second |
| private int mBitRate = -1; |
| |
| // largest color component delta seen (i.e. actual vs. expected) |
| private int mLargestColorDelta; |
| |
| |
| public void testVideoEditQCIF() throws Throwable { |
| setParameters(176, 144, 1100000); |
| VideoEditWrapper.runTest(this); |
| } |
| public void testVideoEditQVGA() throws Throwable { |
| setParameters(320, 240, 2000000); |
| VideoEditWrapper.runTest(this); |
| } |
| public void testVideoEdit720p() throws Throwable { |
| setParameters(1280, 720, 6000000); |
| VideoEditWrapper.runTest(this); |
| } |
| |
| /** |
| * Wraps testEditVideo, running it in a new thread. Required because of the way |
| * SurfaceTexture.OnFrameAvailableListener works when the current thread has a Looper |
| * configured. |
| */ |
| private static class VideoEditWrapper implements Runnable { |
| private Throwable mThrowable; |
| private DecodeEditEncodeTest mTest; |
| |
| private VideoEditWrapper(DecodeEditEncodeTest test) { |
| mTest = test; |
| } |
| |
| @Override |
| public void run() { |
| try { |
| mTest.videoEditTest(); |
| } catch (Throwable th) { |
| mThrowable = th; |
| } |
| } |
| |
| /** Entry point. */ |
| public static void runTest(DecodeEditEncodeTest obj) throws Throwable { |
| VideoEditWrapper wrapper = new VideoEditWrapper(obj); |
| Thread th = new Thread(wrapper, "codec test"); |
| th.start(); |
| th.join(); |
| if (wrapper.mThrowable != null) { |
| throw wrapper.mThrowable; |
| } |
| } |
| } |
| |
| /** |
| * Sets the desired frame size and bit rate. |
| */ |
| private void setParameters(int width, int height, int bitRate) { |
| if ((width % 16) != 0 || (height % 16) != 0) { |
| Log.w(TAG, "WARNING: width or height not multiple of 16"); |
| } |
| mWidth = width; |
| mHeight = height; |
| mBitRate = bitRate; |
| } |
| |
| /** |
| * Tests editing of a video file with GL. |
| */ |
| private void videoEditTest() |
| throws IOException { |
| VideoChunks sourceChunks = new VideoChunks(); |
| |
| if (!generateVideoFile(sourceChunks)) { |
| // No AVC codec? Fail silently. |
| return; |
| } |
| |
| if (DEBUG_SAVE_FILE) { |
| // Save a copy to a file. We call it ".mp4", but it's actually just an elementary |
| // stream, so not all video players will know what to do with it. |
| String dirName = getContext().getFilesDir().getAbsolutePath(); |
| String fileName = "vedit1_" + mWidth + "x" + mHeight + ".mp4"; |
| sourceChunks.saveToFile(new File(dirName, fileName)); |
| } |
| |
| VideoChunks destChunks = editVideoFile(sourceChunks); |
| |
| if (DEBUG_SAVE_FILE) { |
| String dirName = getContext().getFilesDir().getAbsolutePath(); |
| String fileName = "vedit2_" + mWidth + "x" + mHeight + ".mp4"; |
| destChunks.saveToFile(new File(dirName, fileName)); |
| } |
| |
| checkVideoFile(destChunks); |
| } |
| |
| /** |
| * Generates a test video file, saving it as VideoChunks. We generate frames with GL to |
| * avoid having to deal with multiple YUV formats. |
| * |
| * @return true on success, false on "soft" failure |
| */ |
| private boolean generateVideoFile(VideoChunks output) |
| throws IOException { |
| if (VERBOSE) Log.d(TAG, "generateVideoFile " + mWidth + "x" + mHeight); |
| MediaCodec encoder = null; |
| InputSurface inputSurface = null; |
| |
| try { |
| // We avoid the device-specific limitations on width and height by using values that |
| // are multiples of 16, which all tested devices seem to be able to handle. |
| MediaFormat format = MediaFormat.createVideoFormat(MIME_TYPE, mWidth, mHeight); |
| |
| String codecName = selectCodec(format); |
| if (codecName == null) { |
| // Don't fail CTS if they don't have an AVC codec (not here, anyway). |
| Log.e(TAG, "Unable to find an appropriate codec for " + MIME_TYPE); |
| return false; |
| } |
| if (VERBOSE) Log.d(TAG, "found codec: " + codecName); |
| |
| // Set some properties. Failing to specify some of these can cause the MediaCodec |
| // configure() call to throw an unhelpful exception. |
| format.setInteger(MediaFormat.KEY_COLOR_FORMAT, |
| MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface); |
| format.setInteger(MediaFormat.KEY_BIT_RATE, mBitRate); |
| format.setInteger(MediaFormat.KEY_FRAME_RATE, FRAME_RATE); |
| format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, IFRAME_INTERVAL); |
| if (VERBOSE) Log.d(TAG, "format: " + format); |
| output.setMediaFormat(format); |
| |
| // Create a MediaCodec for the desired codec, then configure it as an encoder with |
| // our desired properties. |
| encoder = MediaCodec.createByCodecName(codecName); |
| encoder.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE); |
| inputSurface = new InputSurface(encoder.createInputSurface()); |
| inputSurface.makeCurrent(); |
| encoder.start(); |
| |
| generateVideoData(encoder, inputSurface, output); |
| } finally { |
| if (encoder != null) { |
| if (VERBOSE) Log.d(TAG, "releasing encoder"); |
| encoder.stop(); |
| encoder.release(); |
| if (VERBOSE) Log.d(TAG, "released encoder"); |
| } |
| if (inputSurface != null) { |
| inputSurface.release(); |
| } |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Returns the first codec capable of encoding the specified MIME type, or null if no |
| * match was found. |
| */ |
| private static String selectCodec(MediaFormat format) { |
| MediaCodecList mcl = new MediaCodecList(MediaCodecList.REGULAR_CODECS); |
| return mcl.findEncoderForFormat(format); |
| } |
| |
| /** |
| * Generates video frames, feeds them into the encoder, and writes the output to the |
| * VideoChunks instance. |
| */ |
| private void generateVideoData(MediaCodec encoder, InputSurface inputSurface, |
| VideoChunks output) { |
| final int TIMEOUT_USEC = 10000; |
| ByteBuffer[] encoderOutputBuffers = encoder.getOutputBuffers(); |
| MediaCodec.BufferInfo info = new MediaCodec.BufferInfo(); |
| int generateIndex = 0; |
| int outputCount = 0; |
| |
| // Loop until the output side is done. |
| boolean inputDone = false; |
| boolean outputDone = false; |
| while (!outputDone) { |
| if (VERBOSE) Log.d(TAG, "gen loop"); |
| |
| // If we're not done submitting frames, generate a new one and submit it. The |
| // eglSwapBuffers call will block if the input is full. |
| if (!inputDone) { |
| if (generateIndex == NUM_FRAMES) { |
| // Send an empty frame with the end-of-stream flag set. |
| if (VERBOSE) Log.d(TAG, "signaling input EOS"); |
| if (WORK_AROUND_BUGS) { |
| // Might drop a frame, but at least we won't crash mediaserver. |
| try { Thread.sleep(500); } catch (InterruptedException ie) {} |
| outputDone = true; |
| } else { |
| encoder.signalEndOfInputStream(); |
| } |
| inputDone = true; |
| } else { |
| generateSurfaceFrame(generateIndex); |
| inputSurface.setPresentationTime(computePresentationTime(generateIndex) * 1000); |
| if (VERBOSE) Log.d(TAG, "inputSurface swapBuffers"); |
| inputSurface.swapBuffers(); |
| } |
| generateIndex++; |
| } |
| |
| // Check for output from the encoder. If there's no output yet, we either need to |
| // provide more input, or we need to wait for the encoder to work its magic. We |
| // can't actually tell which is the case, so if we can't get an output buffer right |
| // away we loop around and see if it wants more input. |
| // |
| // If we do find output, drain it all before supplying more input. |
| while (true) { |
| int encoderStatus = encoder.dequeueOutputBuffer(info, TIMEOUT_USEC); |
| if (encoderStatus == MediaCodec.INFO_TRY_AGAIN_LATER) { |
| // no output available yet |
| if (VERBOSE) Log.d(TAG, "no output from encoder available"); |
| break; // out of while |
| } else if (encoderStatus == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) { |
| // not expected for an encoder |
| encoderOutputBuffers = encoder.getOutputBuffers(); |
| if (VERBOSE) Log.d(TAG, "encoder output buffers changed"); |
| } else if (encoderStatus == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) { |
| // expected on API 18+ |
| MediaFormat newFormat = encoder.getOutputFormat(); |
| if (VERBOSE) Log.d(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"); |
| } |
| |
| // Codec config flag must be set iff this is the first chunk of output. This |
| // may not hold for all codecs, but it appears to be the case for video/avc. |
| assertTrue((info.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0 || |
| outputCount != 0); |
| |
| if (info.size != 0) { |
| // Adjust the ByteBuffer values to match BufferInfo. |
| encodedData.position(info.offset); |
| encodedData.limit(info.offset + info.size); |
| |
| output.addChunk(encodedData, info.flags, info.presentationTimeUs); |
| outputCount++; |
| } |
| |
| encoder.releaseOutputBuffer(encoderStatus, false); |
| if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) { |
| outputDone = true; |
| break; // out of while |
| } |
| } |
| } |
| } |
| |
| // One chunk per frame, plus one for the config data. |
| assertEquals("Frame count", NUM_FRAMES + 1, outputCount); |
| } |
| |
| /** |
| * Generates a frame of data using GL commands. |
| * <p> |
| * We have an 8-frame animation sequence that wraps around. It looks like this: |
| * <pre> |
| * 0 1 2 3 |
| * 7 6 5 4 |
| * </pre> |
| * We draw one of the eight rectangles and leave the rest set to the zero-fill color. */ |
| private void generateSurfaceFrame(int frameIndex) { |
| frameIndex %= 8; |
| |
| int startX, startY; |
| if (frameIndex < 4) { |
| // (0,0) is bottom-left in GL |
| startX = frameIndex * (mWidth / 4); |
| startY = mHeight / 2; |
| } else { |
| startX = (7 - frameIndex) * (mWidth / 4); |
| startY = 0; |
| } |
| |
| GLES20.glDisable(GLES20.GL_SCISSOR_TEST); |
| GLES20.glClearColor(TEST_R0 / 255.0f, TEST_G0 / 255.0f, TEST_B0 / 255.0f, 1.0f); |
| GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT); |
| GLES20.glEnable(GLES20.GL_SCISSOR_TEST); |
| GLES20.glScissor(startX, startY, mWidth / 4, mHeight / 2); |
| GLES20.glClearColor(TEST_R1 / 255.0f, TEST_G1 / 255.0f, TEST_B1 / 255.0f, 1.0f); |
| GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT); |
| } |
| |
| /** |
| * 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) |
| throws IOException { |
| if (VERBOSE) Log.d(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.KEY_COLOR_FORMAT, |
| MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface); |
| outputFormat.setInteger(MediaFormat.KEY_BIT_RATE, |
| inputFormat.getInteger(MediaFormat.KEY_BIT_RATE)); |
| outputFormat.setInteger(MediaFormat.KEY_FRAME_RATE, |
| inputFormat.getInteger(MediaFormat.KEY_FRAME_RATE)); |
| outputFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, |
| inputFormat.getInteger(MediaFormat.KEY_I_FRAME_INTERVAL)); |
| |
| outputData.setMediaFormat(outputFormat); |
| |
| encoder = MediaCodec.createEncoderByType(MIME_TYPE); |
| encoder.configure(outputFormat, null, null, MediaCodec.CONFIGURE_FLAG_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.getSurface(), null, 0); |
| decoder.start(); |
| |
| editVideoData(inputData, decoder, outputSurface, inputSurface, encoder, outputData); |
| } finally { |
| if (VERBOSE) Log.d(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; |
| } |
| |
| /** |
| * Edits a stream of video data. |
| */ |
| private void editVideoData(VideoChunks inputData, MediaCodec decoder, |
| OutputSurface outputSurface, InputSurface inputSurface, MediaCodec encoder, |
| VideoChunks outputData) { |
| final int TIMEOUT_USEC = 10000; |
| ByteBuffer[] decoderInputBuffers = decoder.getInputBuffers(); |
| ByteBuffer[] encoderOutputBuffers = encoder.getOutputBuffers(); |
| MediaCodec.BufferInfo info = new MediaCodec.BufferInfo(); |
| int inputChunk = 0; |
| int outputCount = 0; |
| |
| boolean outputDone = false; |
| boolean inputDone = false; |
| boolean decoderDone = false; |
| while (!outputDone) { |
| if (VERBOSE) Log.d(TAG, "edit loop"); |
| |
| // Feed more data to the decoder. |
| if (!inputDone) { |
| int inputBufIndex = decoder.dequeueInputBuffer(TIMEOUT_USEC); |
| if (inputBufIndex >= 0) { |
| if (inputChunk == inputData.getNumChunks()) { |
| // End of stream -- send empty frame with EOS flag set. |
| decoder.queueInputBuffer(inputBufIndex, 0, 0, 0L, |
| MediaCodec.BUFFER_FLAG_END_OF_STREAM); |
| inputDone = true; |
| if (VERBOSE) Log.d(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, flags); |
| if (VERBOSE) { |
| Log.d(TAG, "submitted frame " + inputChunk + " to dec, size=" + |
| inputBuf.position() + " flags=" + flags); |
| } |
| inputChunk++; |
| } |
| } else { |
| if (VERBOSE) Log.d(TAG, "input buffer not available"); |
| } |
| } |
| |
| // Assume output is available. Loop until both assumptions are false. |
| boolean decoderOutputAvailable = !decoderDone; |
| boolean 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 == MediaCodec.INFO_TRY_AGAIN_LATER) { |
| // no output available yet |
| if (VERBOSE) Log.d(TAG, "no output from encoder available"); |
| encoderOutputAvailable = false; |
| } else if (encoderStatus == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) { |
| encoderOutputBuffers = encoder.getOutputBuffers(); |
| if (VERBOSE) Log.d(TAG, "encoder output buffers changed"); |
| } else if (encoderStatus == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) { |
| MediaFormat newFormat = encoder.getOutputFormat(); |
| if (VERBOSE) Log.d(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, info.flags, info.presentationTimeUs); |
| outputCount++; |
| |
| if (VERBOSE) Log.d(TAG, "encoder output " + info.size + " bytes"); |
| } |
| outputDone = (info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0; |
| encoder.releaseOutputBuffer(encoderStatus, false); |
| } |
| if (encoderStatus != MediaCodec.INFO_TRY_AGAIN_LATER) { |
| // 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 == MediaCodec.INFO_TRY_AGAIN_LATER) { |
| // no output available yet |
| if (VERBOSE) Log.d(TAG, "no output from decoder available"); |
| decoderOutputAvailable = false; |
| } else if (decoderStatus == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) { |
| //decoderOutputBuffers = decoder.getOutputBuffers(); |
| if (VERBOSE) Log.d(TAG, "decoder output buffers changed (we don't care)"); |
| } else if (decoderStatus == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) { |
| // expected before first buffer of data |
| MediaFormat newFormat = decoder.getOutputFormat(); |
| if (VERBOSE) Log.d(TAG, "decoder output format changed: " + newFormat); |
| } else if (decoderStatus < 0) { |
| fail("unexpected result from decoder.dequeueOutputBuffer: "+decoderStatus); |
| } else { // decoderStatus >= 0 |
| if (VERBOSE) Log.d(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. |
| boolean 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 (VERBOSE) Log.d(TAG, "awaiting frame"); |
| outputSurface.awaitNewImage(); |
| outputSurface.drawImage(); |
| |
| // Send it to the encoder. |
| inputSurface.setPresentationTime(info.presentationTimeUs * 1000); |
| if (VERBOSE) Log.d(TAG, "swapBuffers"); |
| inputSurface.swapBuffers(); |
| } |
| if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) { |
| // forward decoder EOS to encoder |
| if (VERBOSE) Log.d(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"); |
| } |
| } |
| |
| /** |
| * 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) |
| throws IOException { |
| OutputSurface surface = null; |
| MediaCodec decoder = null; |
| |
| mLargestColorDelta = -1; |
| |
| if (VERBOSE) Log.d(TAG, "checkVideoFile"); |
| |
| try { |
| surface = new OutputSurface(mWidth, mHeight); |
| |
| MediaFormat format = inputData.getMediaFormat(); |
| decoder = MediaCodec.createDecoderByType(MIME_TYPE); |
| decoder.configure(format, surface.getSurface(), 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.i(TAG, "Largest color delta: " + mLargestColorDelta); |
| } |
| } |
| |
| /** |
| * Checks the video data. |
| * |
| * @return the number of bad frames |
| */ |
| private int checkVideoData(VideoChunks inputData, MediaCodec decoder, OutputSurface surface) { |
| final 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; |
| |
| boolean outputDone = false; |
| boolean inputDone = false; |
| while (!outputDone) { |
| if (VERBOSE) Log.d(TAG, "check loop"); |
| |
| // Feed more data to the decoder. |
| if (!inputDone) { |
| int inputBufIndex = decoder.dequeueInputBuffer(TIMEOUT_USEC); |
| if (inputBufIndex >= 0) { |
| if (inputChunk == inputData.getNumChunks()) { |
| // End of stream -- send empty frame with EOS flag set. |
| decoder.queueInputBuffer(inputBufIndex, 0, 0, 0L, |
| MediaCodec.BUFFER_FLAG_END_OF_STREAM); |
| inputDone = true; |
| if (VERBOSE) Log.d(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, flags); |
| if (VERBOSE) { |
| Log.d(TAG, "submitted frame " + inputChunk + " to dec, size=" + |
| inputBuf.position() + " flags=" + flags); |
| } |
| inputChunk++; |
| } |
| } else { |
| if (VERBOSE) Log.d(TAG, "input buffer not available"); |
| } |
| } |
| |
| if (!outputDone) { |
| int decoderStatus = decoder.dequeueOutputBuffer(info, TIMEOUT_USEC); |
| if (decoderStatus == MediaCodec.INFO_TRY_AGAIN_LATER) { |
| // no output available yet |
| if (VERBOSE) Log.d(TAG, "no output from decoder available"); |
| } else if (decoderStatus == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) { |
| decoderOutputBuffers = decoder.getOutputBuffers(); |
| if (VERBOSE) Log.d(TAG, "decoder output buffers changed"); |
| } else if (decoderStatus == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) { |
| MediaFormat newFormat = decoder.getOutputFormat(); |
| if (VERBOSE) Log.d(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 (VERBOSE) Log.d(TAG, "surface decoder given buffer " + decoderStatus + |
| " (size=" + info.size + ")"); |
| if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) { |
| if (VERBOSE) Log.d(TAG, "output EOS"); |
| outputDone = true; |
| } |
| |
| boolean 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 (VERBOSE) Log.d(TAG, "awaiting frame " + checkIndex); |
| assertEquals("Wrong time stamp", computePresentationTime(checkIndex), |
| info.presentationTimeUs); |
| surface.awaitNewImage(); |
| surface.drawImage(); |
| if (!checkSurfaceFrame(checkIndex++)) { |
| badFrames++; |
| } |
| } |
| } |
| } |
| } |
| |
| return badFrames; |
| } |
| |
| /** |
| * Checks the frame for correctness, using GL to check RGB values. |
| * |
| * @return true if the frame looks good |
| */ |
| private boolean checkSurfaceFrame(int frameIndex) { |
| ByteBuffer pixelBuf = ByteBuffer.allocateDirect(4); // TODO - reuse this |
| boolean frameFailed = false; |
| |
| for (int i = 0; i < 8; i++) { |
| // Note the coordinates are inverted on the Y-axis in GL. |
| int x, y; |
| if (i < 4) { |
| x = i * (mWidth / 4) + (mWidth / 8); |
| y = (mHeight * 3) / 4; |
| } else { |
| x = (7 - i) * (mWidth / 4) + (mWidth / 8); |
| y = mHeight / 4; |
| } |
| |
| GLES20.glReadPixels(x, y, 1, 1, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, pixelBuf); |
| int r = pixelBuf.get(0) & 0xff; |
| int g = pixelBuf.get(1) & 0xff; |
| int b = pixelBuf.get(2) & 0xff; |
| //Log.d(TAG, "GOT(" + frameIndex + "/" + i + "): r=" + r + " g=" + g + " b=" + b); |
| |
| int expR, expG, expB; |
| if (i == frameIndex % 8) { |
| // colored rect (green/blue swapped) |
| expR = TEST_R1; |
| expG = TEST_B1; |
| expB = TEST_G1; |
| } else { |
| // zero background color (green/blue swapped) |
| expR = TEST_R0; |
| expG = TEST_B0; |
| expB = TEST_G0; |
| } |
| if (!isColorClose(r, expR) || |
| !isColorClose(g, expG) || |
| !isColorClose(b, expB)) { |
| Log.w(TAG, "Bad frame " + frameIndex + " (rect=" + i + ": rgb=" + r + |
| "," + g + "," + b + " vs. expected " + expR + "," + expG + |
| "," + expB + ")"); |
| frameFailed = true; |
| } |
| } |
| |
| return !frameFailed; |
| } |
| |
| /** |
| * Returns true if the actual color value is close to the expected color value. Updates |
| * mLargestColorDelta. |
| */ |
| boolean isColorClose(int actual, int expected) { |
| final int MAX_DELTA = 8; |
| int delta = Math.abs(actual - expected); |
| if (delta > mLargestColorDelta) { |
| mLargestColorDelta = delta; |
| } |
| return (delta <= MAX_DELTA); |
| } |
| |
| /** |
| * Generates the presentation time for frame N, in microseconds. |
| */ |
| private static long computePresentationTime(int frameIndex) { |
| return 123 + frameIndex * 1000000 / FRAME_RATE; |
| } |
| |
| |
| /** |
| * The elementary stream coming out of the encoder needs to be fed back into |
| * the decoder one chunk at a time. If we just wrote the data to a file, we would lose |
| * the information about chunk boundaries. This class stores the encoded data in memory, |
| * retaining the chunk organization. |
| */ |
| private static class VideoChunks { |
| private MediaFormat mMediaFormat; |
| private ArrayList<byte[]> mChunks = new ArrayList<byte[]>(); |
| private ArrayList<Integer> mFlags = new ArrayList<Integer>(); |
| private ArrayList<Long> mTimes = new ArrayList<Long>(); |
| |
| /** |
| * Sets the MediaFormat, for the benefit of a future decoder. |
| */ |
| public void setMediaFormat(MediaFormat format) { |
| mMediaFormat = format; |
| } |
| |
| /** |
| * Gets the MediaFormat that was used by the encoder. |
| */ |
| public MediaFormat getMediaFormat() { |
| return mMediaFormat; |
| } |
| |
| /** |
| * Adds a new chunk. Advances buf.position to buf.limit. |
| */ |
| public void addChunk(ByteBuffer buf, int flags, long time) { |
| byte[] data = new byte[buf.remaining()]; |
| buf.get(data); |
| mChunks.add(data); |
| mFlags.add(flags); |
| mTimes.add(time); |
| } |
| |
| /** |
| * Returns the number of chunks currently held. |
| */ |
| public int getNumChunks() { |
| return mChunks.size(); |
| } |
| |
| /** |
| * Copies the data from chunk N into "dest". Advances dest.position. |
| */ |
| public void getChunkData(int chunk, ByteBuffer dest) { |
| byte[] data = mChunks.get(chunk); |
| dest.put(data); |
| } |
| |
| /** |
| * Returns the flags associated with chunk N. |
| */ |
| public int getChunkFlags(int chunk) { |
| return mFlags.get(chunk); |
| } |
| |
| /** |
| * Returns the timestamp associated with chunk N. |
| */ |
| public long getChunkTime(int chunk) { |
| return mTimes.get(chunk); |
| } |
| |
| /** |
| * Writes the chunks to a file as a contiguous stream. Useful for debugging. |
| */ |
| public void saveToFile(File file) { |
| Log.d(TAG, "saving chunk data to file " + file); |
| FileOutputStream fos = null; |
| BufferedOutputStream bos = null; |
| |
| try { |
| fos = new FileOutputStream(file); |
| bos = new BufferedOutputStream(fos); |
| fos = null; // closing bos will also close fos |
| |
| int numChunks = getNumChunks(); |
| for (int i = 0; i < numChunks; i++) { |
| byte[] chunk = mChunks.get(i); |
| bos.write(chunk); |
| } |
| } catch (IOException ioe) { |
| throw new RuntimeException(ioe); |
| } finally { |
| try { |
| if (bos != null) { |
| bos.close(); |
| } |
| if (fos != null) { |
| fos.close(); |
| } |
| } catch (IOException ioe) { |
| throw new RuntimeException(ioe); |
| } |
| } |
| } |
| } |
| } |
