1 files changed, 324 insertions, 0 deletions
diff --git a/media/gmp-clearkey/0.1/VideoDecoder.cpp b/media/gmp-clearkey/0.1/VideoDecoder.cpp
new file mode 100644
index 0000000000..570eb99357
--- /dev/null
+++ b/media/gmp-clearkey/0.1/VideoDecoder.cpp
@@ -0,0 +1,324 @@
+/*
+ * Copyright 2013, Mozilla Foundation and contributors
+ *
+ * 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.
+ */
+
+#include <algorithm>
+#include <cstdint>
+#include <limits>
+
+#include "BigEndian.h"
+#include "ClearKeyUtils.h"
+#include "ClearKeyDecryptionManager.h"
+#include "VideoDecoder.h"
+#include "mozilla/CheckedInt.h"
+
+using namespace wmf;
+
+VideoDecoder::VideoDecoder(cdm::Host_10* aHost)
+    : mHost(aHost), mHasShutdown(false) {
+  CK_LOGD("VideoDecoder created");
+
+  // We drop the ref in DecodingComplete().
+  AddRef();
+
+  mDecoder = new WMFH264Decoder();
+
+  uint32_t cores = std::max(1u, std::thread::hardware_concurrency());
+
+  HRESULT hr = mDecoder->Init(cores);
+  if (FAILED(hr)) {
+    CK_LOGE("Failed to initialize mDecoder!");
+  }
+}
+
+VideoDecoder::~VideoDecoder() { CK_LOGD("VideoDecoder destroyed"); }
+
+cdm::Status VideoDecoder::InitDecode(const cdm::VideoDecoderConfig_2& aConfig) {
+  CK_LOGD("VideoDecoder::InitDecode");
+
+  if (!mDecoder) {
+    CK_LOGD("VideoDecoder::InitDecode failed to init WMFH264Decoder");
+
+    return cdm::Status::kDecodeError;
+  }
+
+  return cdm::Status::kSuccess;
+}
+
+cdm::Status VideoDecoder::Decode(const cdm::InputBuffer_2& aInputBuffer,
+                                 cdm::VideoFrame* aVideoFrame) {
+  CK_LOGD("VideoDecoder::Decode");
+  // If the input buffer we have been passed has a null buffer, it means we
+  // should drain.
+  if (!aInputBuffer.data) {
+    // This will drain the decoder until there are no frames left to drain,
+    // whereupon it will return 'NeedsMoreData'.
+    CK_LOGD("VideoDecoder::Decode Input buffer null: Draining");
+    return Drain(aVideoFrame);
+  }
+
+  DecodeData* data = new DecodeData();
+  Assign(data->mBuffer, aInputBuffer.data, aInputBuffer.data_size);
+  data->mTimestamp = aInputBuffer.timestamp;
+  data->mCrypto = CryptoMetaData(&aInputBuffer);
+
+  AutoPtr<DecodeData> d(data);
+  HRESULT hr;
+
+  if (!data || !mDecoder) {
+    CK_LOGE("Decode job not set up correctly!");
+    return cdm::Status::kDecodeError;
+  }
+
+  std::vector<uint8_t>& buffer = data->mBuffer;
+
+  if (data->mCrypto.IsValid()) {
+    Status rv =
+        ClearKeyDecryptionManager::Get()->Decrypt(buffer, data->mCrypto);
+
+    if (STATUS_FAILED(rv)) {
+      CK_LOGARRAY("Failed to decrypt video using key ", aInputBuffer.key_id,
+                  aInputBuffer.key_id_size);
+      return rv;
+    }
+  }
+
+  hr = mDecoder->Input(buffer.data(), buffer.size(), data->mTimestamp);
+
+  CK_LOGD("VideoDecoder::Decode() Input ret hr=0x%x", hr);
+
+  if (FAILED(hr)) {
+    assert(hr != MF_E_TRANSFORM_NEED_MORE_INPUT);
+
+    CK_LOGE("VideoDecoder::Decode() decode failed ret=0x%x%s", hr,
+            ((hr == MF_E_NOTACCEPTING) ? " (MF_E_NOTACCEPTING)" : ""));
+    CK_LOGD("Decode failed. The decoder is not accepting input");
+    return cdm::Status::kDecodeError;
+  }
+
+  return OutputFrame(aVideoFrame);
+}
+
+cdm::Status VideoDecoder::OutputFrame(cdm::VideoFrame* aVideoFrame) {
+  CK_LOGD("VideoDecoder::OutputFrame");
+
+  HRESULT hr = S_OK;
+
+  // Read all the output from the decoder. Ideally, this would be a while loop
+  // where we read the output and check the result as the condition. However,
+  // this produces a memory leak connected to assigning a new CComPtr to the
+  // address of the old one, which avoids the CComPtr cleaning up.
+  while (true) {
+    CComPtr<IMFSample> output;
+    hr = mDecoder->Output(&output);
+
+    if (hr != S_OK) {
+      break;
+    }
+
+    CK_LOGD("VideoDecoder::OutputFrame Decoder output ret=0x%x", hr);
+
+    mOutputQueue.push(output);
+    CK_LOGD("VideoDecoder::OutputFrame: Queue size: %u", mOutputQueue.size());
+  }
+
+  // If we don't have any inputs, we need more data.
+  if (mOutputQueue.empty()) {
+    CK_LOGD("Decode failed. Not enought data; Requesting more input");
+    return cdm::Status::kNeedMoreData;
+  }
+
+  // We will get a MF_E_TRANSFORM_NEED_MORE_INPUT every time, as we always
+  // consume everything in the buffer.
+  if (hr != MF_E_TRANSFORM_NEED_MORE_INPUT && FAILED(hr)) {
+    CK_LOGD("Decode failed output ret=0x%x", hr);
+    return cdm::Status::kDecodeError;
+  }
+
+  CComPtr<IMFSample> result = mOutputQueue.front();
+  mOutputQueue.pop();
+
+  // The Chromium CDM API doesn't have support for negative strides, though
+  // they are theoretically possible in real world data.
+  if (mDecoder->GetStride() <= 0) {
+    CK_LOGD("VideoDecoder::OutputFrame Failed! (negative stride)");
+    return cdm::Status::kDecodeError;
+  }
+
+  const IntRect& picture = mDecoder->GetPictureRegion();
+  hr = SampleToVideoFrame(result, picture.width, picture.height,
+                          mDecoder->GetStride(), mDecoder->GetFrameHeight(),
+                          aVideoFrame);
+  if (FAILED(hr)) {
+    CK_LOGD("VideoDecoder::OutputFrame Failed!");
+    return cdm::Status::kDecodeError;
+  }
+
+  CK_LOGD("VideoDecoder::OutputFrame Succeeded.");
+  return cdm::Status::kSuccess;
+}
+
+HRESULT
+VideoDecoder::SampleToVideoFrame(IMFSample* aSample, int32_t aPictureWidth,
+                                 int32_t aPictureHeight, int32_t aStride,
+                                 int32_t aFrameHeight,
+                                 cdm::VideoFrame* aVideoFrame) {
+  CK_LOGD("[%p] VideoDecoder::SampleToVideoFrame()", this);
+
+  ENSURE(aSample != nullptr, E_POINTER);
+  ENSURE(aVideoFrame != nullptr, E_POINTER);
+
+  HRESULT hr;
+  CComPtr<IMFMediaBuffer> mediaBuffer;
+
+  aVideoFrame->SetFormat(kI420);
+
+  // Must convert to contiguous mediaBuffer to use IMD2DBuffer interface.
+  hr = aSample->ConvertToContiguousBuffer(&mediaBuffer);
+  ENSURE(SUCCEEDED(hr), hr);
+
+  // Try and use the IMF2DBuffer interface if available, otherwise fallback
+  // to the IMFMediaBuffer interface. Apparently IMF2DBuffer is more efficient,
+  // but only some systems (Windows 8?) support it.
+  BYTE* data = nullptr;
+  LONG stride = 0;
+  CComPtr<IMF2DBuffer> twoDBuffer;
+  hr = mediaBuffer->QueryInterface(static_cast<IMF2DBuffer**>(&twoDBuffer));
+  if (SUCCEEDED(hr)) {
+    hr = twoDBuffer->Lock2D(&data, &stride);
+    ENSURE(SUCCEEDED(hr), hr);
+  } else {
+    hr = mediaBuffer->Lock(&data, nullptr, nullptr);
+    ENSURE(SUCCEEDED(hr), hr);
+    stride = aStride;
+  }
+
+  // WMF stores the U and V planes 16-row-aligned, so we need to add padding
+  // to the row heights to ensure the source offsets of the Y'CbCr planes are
+  // referenced properly.
+  // YV12, planar format: [YYYY....][UUUU....][VVVV....]
+  // i.e., Y, then U, then V.
+  uint32_t padding = 0;
+  if (aFrameHeight % 16 != 0) {
+    padding = 16 - (aFrameHeight % 16);
+  }
+  uint32_t srcYSize = stride * (aFrameHeight + padding);
+  uint32_t srcUVSize = stride * (aFrameHeight + padding) / 4;
+  uint32_t halfStride = (stride + 1) / 2;
+
+  aVideoFrame->SetStride(cdm::VideoPlane::kYPlane, stride);
+  aVideoFrame->SetStride(cdm::VideoPlane::kUPlane, halfStride);
+  aVideoFrame->SetStride(cdm::VideoPlane::kVPlane, halfStride);
+
+  aVideoFrame->SetSize(cdm::Size{aPictureWidth, aPictureHeight});
+
+  // Note: We allocate the minimal sized buffer required to send the
+  // frame back over to the parent process. This is so that we request the
+  // same sized frame as the buffer allocator expects.
+  using mozilla::CheckedUint32;
+  CheckedUint32 bufferSize = CheckedUint32(stride) * aPictureHeight +
+                             ((CheckedUint32(stride) * aPictureHeight) / 4) * 2;
+
+  // If the buffer is bigger than the max for a 32 bit, fail to avoid buffer
+  // overflows.
+  if (!bufferSize.isValid()) {
+    CK_LOGD("VideoDecoder::SampleToFrame Buffersize bigger than UINT32_MAX");
+    return E_FAIL;
+  }
+
+  // Get the buffer from the host.
+  cdm::Buffer* buffer = mHost->Allocate(bufferSize.value());
+  aVideoFrame->SetFrameBuffer(buffer);
+
+  // Make sure the buffer is non-null (allocate guarantees it will be of
+  // sufficient size).
+  if (!buffer) {
+    CK_LOGD("VideoDecoder::SampleToFrame Out of memory");
+    return E_OUTOFMEMORY;
+  }
+
+  uint8_t* outBuffer = buffer->Data();
+
+  aVideoFrame->SetPlaneOffset(cdm::VideoPlane::kYPlane, 0);
+
+  // Offset of U plane is the size of the Y plane, excluding the padding that
+  // WMF adds.
+  uint32_t dstUOffset = stride * aPictureHeight;
+  aVideoFrame->SetPlaneOffset(cdm::VideoPlane::kUPlane, dstUOffset);
+
+  // Offset of the V plane is the size of the Y plane + the size of the U plane,
+  // excluding any padding WMF adds.
+  uint32_t dstVOffset = stride * aPictureHeight + (stride * aPictureHeight) / 4;
+  aVideoFrame->SetPlaneOffset(cdm::VideoPlane::kVPlane, dstVOffset);
+
+  // Copy the pixel data, excluding WMF's padding.
+  memcpy(outBuffer, data, stride * aPictureHeight);
+  memcpy(outBuffer + dstUOffset, data + srcYSize,
+         (stride * aPictureHeight) / 4);
+  memcpy(outBuffer + dstVOffset, data + srcYSize + srcUVSize,
+         (stride * aPictureHeight) / 4);
+
+  if (twoDBuffer) {
+    twoDBuffer->Unlock2D();
+  } else {
+    mediaBuffer->Unlock();
+  }
+
+  LONGLONG hns = 0;
+  hr = aSample->GetSampleTime(&hns);
+  ENSURE(SUCCEEDED(hr), hr);
+
+  aVideoFrame->SetTimestamp(HNsToUsecs(hns));
+
+  return S_OK;
+}
+
+void VideoDecoder::Reset() {
+  CK_LOGD("VideoDecoder::Reset");
+
+  if (mDecoder) {
+    mDecoder->Reset();
+  }
+
+  // Remove all the frames from the output queue.
+  while (!mOutputQueue.empty()) {
+    mOutputQueue.pop();
+  }
+}
+
+cdm::Status VideoDecoder::Drain(cdm::VideoFrame* aVideoFrame) {
+  CK_LOGD("VideoDecoder::Drain()");
+
+  if (!mDecoder) {
+    CK_LOGD("Drain failed! Decoder was not initialized");
+    return Status::kDecodeError;
+  }
+
+  mDecoder->Drain();
+
+  // Return any pending output.
+  return OutputFrame(aVideoFrame);
+}
+
+void VideoDecoder::DecodingComplete() {
+  CK_LOGD("VideoDecoder::DecodingComplete()");
+
+  mHasShutdown = true;
+
+  // Release the reference we added in the constructor. There may be
+  // WrapRefCounted tasks that also hold references to us, and keep
+  // us alive a little longer.
+  Release();
+}