下面列出了android.media.MediaCodec# createInputSurface ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
@Override
protected MediaCodec internal_configure(MediaCodec previous_codec,
final MediaFormat format) throws IOException {
if (DEBUG) Log.v(TAG, "internal_configure:");
format.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface); // API >= 18
format.setInteger(MediaFormat.KEY_BIT_RATE, mBitRate > 0 ? mBitRate : calcBitRate());
format.setInteger(MediaFormat.KEY_FRAME_RATE, mFrameRate);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, mIFrameIntervals);
if (DEBUG) Log.i(TAG, "format: " + format);
if (previous_codec == null)
previous_codec = MediaCodec.createEncoderByType(MIME_TYPE);
previous_codec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mSurface = previous_codec.createInputSurface(); // API >= 18
return previous_codec;
}
@Override
protected MediaCodec createEncoder() throws IOException {
LogUtil.logd(TAG, "createEncoder");
MediaFormat videoFormat = MediaFormat.createVideoFormat(MIME_TYPE, mVideoSize.getWidth(), mVideoSize.getHeight());
videoFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
videoFormat.setInteger(MediaFormat.KEY_BIT_RATE, mBitRate);
videoFormat.setInteger(MediaFormat.KEY_FRAME_RATE, FRAME_RATE);
videoFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, mIFrameInterval);
LogUtil.logd(TAG, "format: " + videoFormat);
MediaCodec encoder = MediaCodec.createEncoderByType(MIME_TYPE);
encoder.configure(videoFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mInputSurface = encoder.createInputSurface();
encoder.start();
LogUtil.logd(TAG, "createEncoder finishing");
return encoder;
}
@TargetApi(MIN_API_LEVEL_VIDEO)
public static int checkMediaCodecVideoEncoderSupport(){
if(getApiLevel()<MIN_API_LEVEL_VIDEO){
Log.d(TAG, "checkMediaCodecVideoEncoderSupport: Min API is 18");
return CODEC_REQ_API_NOT_SATISFIED;
}
MediaFormat format = MediaFormat.createVideoFormat(MIME_TYPE_VIDEO, TEST_WIDTH, TEST_HEIGHT);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT,
MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
format.setInteger(MediaFormat.KEY_BIT_RATE, TEST_VIDEO_BIT_RATE);
format.setInteger(MediaFormat.KEY_FRAME_RATE, TEST_FRAME_RATE);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, TEST_IFRAME_INTERVAL);
MediaCodec mediaCodec;
try {
mediaCodec = MediaCodec.createEncoderByType(MIME_TYPE_VIDEO);
mediaCodec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mediaCodec.createInputSurface();
mediaCodec.start();
mediaCodec.stop();
mediaCodec.release();
mediaCodec = null;
} catch (Exception ex) {
Log.e(TAG, "Failed on creation of codec #", ex);
return CODEC_ERROR;
}
return CODEC_SUPPORTED;
}
@TargetApi(MIN_API_LEVEL_VIDEO)
public static int checkMediaCodecVideoEncoderSupport(){
if(getApiLevel()<MIN_API_LEVEL_VIDEO){
Log.d(TAG, "checkMediaCodecVideoEncoderSupport: Min API is 18");
return CODEC_REQ_API_NOT_SATISFIED;
}
MediaFormat format = MediaFormat.createVideoFormat(MIME_TYPE_VIDEO, TEST_WIDTH, TEST_HEIGHT);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT,
MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
format.setInteger(MediaFormat.KEY_BIT_RATE, TEST_VIDEO_BIT_RATE);
format.setInteger(MediaFormat.KEY_FRAME_RATE, TEST_FRAME_RATE);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, TEST_IFRAME_INTERVAL);
MediaCodec mediaCodec;
try {
mediaCodec = MediaCodec.createEncoderByType(MIME_TYPE_VIDEO);
mediaCodec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mediaCodec.createInputSurface();
mediaCodec.start();
mediaCodec.stop();
mediaCodec.release();
mediaCodec = null;
} catch (Exception ex) {
Log.e(TAG, "Failed on creation of codec #", ex);
return CODEC_ERROR;
}
return CODEC_SUPPORTED;
}
@Override
public void run() {
MediaFormat format = MediaFormat.createVideoFormat("video/avc",
mWidth, mHeight);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT,
MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
format.setInteger(MediaFormat.KEY_BIT_RATE, BIT_RATE);
format.setInteger(MediaFormat.KEY_FRAME_RATE, FRAME_RATE);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL,
I_FRAME_INTERVAL);
MediaCodec codec = MediaCodec.createEncoderByType("video/avc");
codec.configure(format, null, null,
MediaCodec.CONFIGURE_FLAG_ENCODE);
Surface surface = codec.createInputSurface();
codec.start();
VirtualDisplay virtualDisplay = mDisplayManager
.createVirtualDisplay(DISPLAY_NAME, mWidth, mHeight,
mDensityDpi, surface,
DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC);
if (virtualDisplay != null) {
stream(codec);
virtualDisplay.release();
}
codec.signalEndOfInputStream();
codec.stop();
}
@Override
protected void onEncoderConfigured(MediaCodec encoder) {
mSurface = encoder.createInputSurface();
if (VERBOSE) LogUtil.i("@@", "VideoEncoder create input surface: " + mSurface);
}
@Override
protected void onStartEncoder(@NonNull MediaFormat format, @NonNull MediaCodec encoder) {
mEncoderInputSurface = new VideoEncoderInput(encoder.createInputSurface());
super.onStartEncoder(format, encoder);
}
@Override
protected void onEncoderConfigured(MediaCodec encoder) {
mSurface = encoder.createInputSurface();
if (VERBOSE) Log.i("@@", "VideoEncoder create input surface: " + mSurface);
}
/**
* 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) {
if (VERBOSE) Log.d(TAG, "generateVideoFile " + mWidth + "x" + mHeight);
MediaCodec encoder = null;
InputSurface inputSurface = null;
try {
MediaCodecInfo codecInfo = selectCodec(MIME_TYPE);
if (codecInfo == 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: " + codecInfo.getName());
// 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);
// 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(codecInfo.getName());
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;
}
/**
* 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 (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;
}
/**
* Tests encoding and subsequently decoding video from frames generated into a buffer.
* <p>
* We encode several frames of a video test pattern using MediaCodec, then decode the
* output with MediaCodec and do some simple checks.
*/
private void encodeDecodeVideoFromSurfaceToSurface() throws Exception {
MediaCodec encoder = null;
MediaCodec decoder = null;
InputSurface inputSurface = null;
OutputSurface outputSurface = null;
mLargestColorDelta = -1;
try {
MediaCodecInfo codecInfo = selectCodec(MIME_TYPE);
if (codecInfo == 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;
}
if (VERBOSE) Log.d(TAG, "found codec: " + codecInfo.getName());
int colorFormat = MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface;
// 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);
// 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, colorFormat);
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);
// Create the output surface.
outputSurface = new OutputSurface(mWidth, mHeight);
// Create a MediaCodec for the decoder, just based on the MIME type. The various
// format details will be passed through the csd-0 meta-data later on.
decoder = MediaCodec.createDecoderByType(MIME_TYPE);
MediaFormat decoderFormat = MediaFormat.createVideoFormat(MIME_TYPE, mWidth, mHeight);
decoder.configure(format, outputSurface.getSurface(), null, 0);
decoder.start();
// Create a MediaCodec for the desired codec, then configure it as an encoder with
// our desired properties. Request a Surface to use for input.
encoder = MediaCodec.createByCodecName(codecInfo.getName());
encoder.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
inputSurface = new InputSurface(encoder.createInputSurface());
encoder.start();
doEncodeDecodeVideoFromSurfaceToSurface(encoder, inputSurface, colorFormat, decoder, outputSurface);
} finally {
if (VERBOSE) Log.d(TAG, "releasing codecs");
if (inputSurface != null) {
inputSurface.release();
}
if (outputSurface != null) {
outputSurface.release();
}
if (encoder != null) {
encoder.stop();
encoder.release();
}
if (decoder != null) {
decoder.stop();
decoder.release();
}
Log.i(TAG, "Largest color delta: " + mLargestColorDelta);
}
}
public Surface(MediaCodec mediaCodec, IEglUtil eglUtil) {
this.inputSurface = new InputSurface(mediaCodec.createInputSurface(), EGL14.eglGetCurrentContext());
this.inputSurface.makeCurrent();
this.outputSurface = new OutputSurface(eglUtil);
}
public SimpleSurface(MediaCodec mediaCodec, EGLContext eglSharedCtx) {
androidSurface = mediaCodec.createInputSurface();
inputSurface = new InputSurface(androidSurface, eglSharedCtx);
}
/**
* Tests encoding and subsequently decoding video from frames generated into a buffer.
* <p>
* We encode several frames of a video test pattern using MediaCodec, then decode the
* output with MediaCodec and do some simple checks.
*/
private void encodeDecodeVideoFromSurfaceToSurface() throws Exception {
MediaCodec encoder = null;
MediaCodec decoder = null;
InputSurface inputSurface = null;
OutputSurface outputSurface = null;
mLargestColorDelta = -1;
try {
MediaCodecInfo codecInfo = selectCodec(MIME_TYPE);
if (codecInfo == 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;
}
if (VERBOSE) Log.d(TAG, "found codec: " + codecInfo.getName());
int colorFormat = MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface;
// 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);
// 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, colorFormat);
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);
// Create the output surface.
outputSurface = new OutputSurface(mWidth, mHeight);
// Create a MediaCodec for the decoder, just based on the MIME type. The various
// format details will be passed through the csd-0 meta-data later on.
decoder = MediaCodec.createDecoderByType(MIME_TYPE);
MediaFormat decoderFormat = MediaFormat.createVideoFormat(MIME_TYPE, mWidth, mHeight);
decoder.configure(format, outputSurface.getSurface(), null, 0);
decoder.start();
// Create a MediaCodec for the desired codec, then configure it as an encoder with
// our desired properties. Request a Surface to use for input.
encoder = MediaCodec.createByCodecName(codecInfo.getName());
encoder.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
inputSurface = new InputSurface(encoder.createInputSurface());
encoder.start();
doEncodeDecodeVideoFromSurfaceToSurface(encoder, inputSurface, colorFormat, decoder, outputSurface);
} finally {
if (VERBOSE) Log.d(TAG, "releasing codecs");
if (inputSurface != null) {
inputSurface.release();
}
if (outputSurface != null) {
outputSurface.release();
}
if (encoder != null) {
encoder.stop();
encoder.release();
}
if (decoder != null) {
decoder.stop();
decoder.release();
}
Log.i(TAG, "Largest color delta: " + mLargestColorDelta);
}
}