Use data pipe to pass DecoderBuffer contents

media/mojo/services/mojo_decryptor_service.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/mojo/services/mojo_decryptor_service.h"
 
 #include "base/bind.h"
 #include "media/base/audio_decoder_config.h"
 #include "media/base/cdm_context.h"
 #include "media/base/decoder_buffer.h"
 #include "media/base/decryptor.h"
 #include "media/base/media_keys.h"
 #include "media/base/video_decoder_config.h"
+#include "media/base/video_frame.h"
 #include "media/mojo/interfaces/demuxer_stream.mojom.h"
 #include "media/mojo/services/media_type_converters.h"
 
 namespace media {
 
 MojoDecryptorService::MojoDecryptorService(
     const scoped_refptr<MediaKeys>& cdm,
     mojo::InterfaceRequest<interfaces::Decryptor> request,
     const mojo::Closure& error_handler)
     : binding_(this, request.Pass()), cdm_(cdm), weak_factory_(this) {
   decryptor_ = cdm->GetCdmContext()->GetDecryptor();
   DCHECK(decryptor_);
   weak_this_ = weak_factory_.GetWeakPtr();
   binding_.set_connection_error_handler(error_handler);
 }
 
 MojoDecryptorService::~MojoDecryptorService() {}
 
+void MojoDecryptorService::Initialize(
+    mojo::ScopedDataPipeConsumerHandle receive_pipe,
+    mojo::ScopedDataPipeProducerHandle transmit_pipe) {
+  write_pipe_ = transmit_pipe.Pass();
+  read_pipe_ = receive_pipe.Pass();
+}
+
 void MojoDecryptorService::Decrypt(interfaces::DemuxerStream::Type stream_type,
                                    interfaces::DecoderBufferPtr encrypted,
                                    const DecryptCallback& callback) {
+  DVLOG(1) << __FUNCTION__;
+
+  scoped_refptr<DecoderBuffer> buffer(
+      encrypted.To<scoped_refptr<DecoderBuffer>>());
+  ReadDataFromDataPipe(buffer);
   decryptor_->Decrypt(
-      static_cast<media::Decryptor::StreamType>(stream_type),
-      encrypted.To<scoped_refptr<DecoderBuffer>>(),
+      static_cast<media::Decryptor::StreamType>(stream_type), buffer,
       base::Bind(&MojoDecryptorService::OnDecryptDone, weak_this_, callback));
 }
 
 void MojoDecryptorService::CancelDecrypt(
     interfaces::DemuxerStream::Type stream_type) {
+  DVLOG(1) << __FUNCTION__;
   decryptor_->CancelDecrypt(
       static_cast<media::Decryptor::StreamType>(stream_type));
 }
 
 void MojoDecryptorService::InitializeAudioDecoder(
     interfaces::AudioDecoderConfigPtr config,
     const InitializeAudioDecoderCallback& callback) {
+  DVLOG(1) << __FUNCTION__;
   decryptor_->InitializeAudioDecoder(
       config.To<AudioDecoderConfig>(),
       base::Bind(&MojoDecryptorService::OnAudioDecoderInitialized, weak_this_,
                  callback));
 }
 
 void MojoDecryptorService::InitializeVideoDecoder(
     interfaces::VideoDecoderConfigPtr config,
     const InitializeVideoDecoderCallback& callback) {
+  DVLOG(1) << __FUNCTION__;
   decryptor_->InitializeVideoDecoder(
       config.To<VideoDecoderConfig>(),
       base::Bind(&MojoDecryptorService::OnVideoDecoderInitialized, weak_this_,
                  callback));
 }
 
 void MojoDecryptorService::DecryptAndDecodeAudio(
     interfaces::DecoderBufferPtr encrypted,
     const DecryptAndDecodeAudioCallback& callback) {
+  DVLOG(1) << __FUNCTION__;

[xhwang, 2015/12/19 18:16:31]

ditto about log level.

[jrummell, 2015/12/21 23:20:55]

Done.

+  scoped_refptr<DecoderBuffer> buffer(
+      encrypted.To<scoped_refptr<DecoderBuffer>>());
+  ReadDataFromDataPipe(buffer);
   decryptor_->DecryptAndDecodeAudio(
-      encrypted.To<scoped_refptr<DecoderBuffer>>(),
+      buffer,
       base::Bind(&MojoDecryptorService::OnAudioDecoded, weak_this_, callback));
 }
 
 void MojoDecryptorService::DecryptAndDecodeVideo(
     interfaces::DecoderBufferPtr encrypted,
     const DecryptAndDecodeVideoCallback& callback) {
+  DVLOG(1) << __FUNCTION__;
+  scoped_refptr<DecoderBuffer> buffer(
+      encrypted.To<scoped_refptr<DecoderBuffer>>());
+  ReadDataFromDataPipe(buffer);
   decryptor_->DecryptAndDecodeVideo(
-      encrypted.To<scoped_refptr<DecoderBuffer>>(),
+      buffer,
       base::Bind(&MojoDecryptorService::OnVideoDecoded, weak_this_, callback));
 }
 
 void MojoDecryptorService::ResetDecoder(
     interfaces::DemuxerStream::Type stream_type) {
+  DVLOG(1) << __FUNCTION__;
   decryptor_->ResetDecoder(
       static_cast<media::Decryptor::StreamType>(stream_type));
 }
 
 void MojoDecryptorService::DeinitializeDecoder(
     interfaces::DemuxerStream::Type stream_type) {
+  DVLOG(1) << __FUNCTION__;
   decryptor_->DeinitializeDecoder(
       static_cast<media::Decryptor::StreamType>(stream_type));
 }
 
 void MojoDecryptorService::OnDecryptDone(
     const DecryptCallback& callback,
     media::Decryptor::Status status,
     const scoped_refptr<DecoderBuffer>& buffer) {
   DVLOG(1) << __FUNCTION__ << "(" << status << ")";
+  if (!buffer) {
+    DCHECK_NE(status, media::Decryptor::kSuccess);
+    callback.Run(static_cast<Decryptor::Status>(status), nullptr);
+    return;
+  }
+
+  DVLOG(3) << " buffer: " << buffer->AsHumanReadableString();
+  WriteDataIntoDataPipe(buffer);
   callback.Run(static_cast<Decryptor::Status>(status),
                interfaces::DecoderBuffer::From(buffer));
 }
 
 void MojoDecryptorService::OnAudioDecoderInitialized(
     const InitializeAudioDecoderCallback& callback,
     bool success) {
   DVLOG(1) << __FUNCTION__ << "(" << success << ")";
   callback.Run(success);
 }
@@ skipping 16 matching lines @@
     audio_buffers.push_back(interfaces::AudioBuffer::From(frame).Pass());
 
   callback.Run(static_cast<Decryptor::Status>(status), audio_buffers.Pass());
 }
 
 void MojoDecryptorService::OnVideoDecoded(
     const DecryptAndDecodeVideoCallback& callback,
     media::Decryptor::Status status,
     const scoped_refptr<VideoFrame>& frame) {
   DVLOG(1) << __FUNCTION__ << "(" << status << ")";
+  if (!frame) {
+    DCHECK_NE(status, media::Decryptor::kSuccess);
+    callback.Run(static_cast<Decryptor::Status>(status), nullptr);
+    return;
+  }
 
+  DVLOG(3) << " video_frame: " << frame->AsHumanReadableString();
   callback.Run(static_cast<Decryptor::Status>(status),
                interfaces::VideoFrame::From(frame).Pass());
 }
 
+void MojoDecryptorService::WriteDataIntoDataPipe(
+    const scoped_refptr<DecoderBuffer>& buffer) {
+  if (!buffer->end_of_stream()) {

[xhwang, 2015/12/19 18:16:31]

ditto

[jrummell, 2015/12/21 23:20:55]

Done.

+    // Serialize the data section of the DecoderBuffer into our pipe.
+    uint32_t num_bytes = buffer->data_size();
+    DCHECK_GT(num_bytes, 0u);
+    CHECK_EQ(WriteDataRaw(write_pipe_.get(), buffer->data(), &num_bytes,
+                          MOJO_READ_DATA_FLAG_ALL_OR_NONE),
+             MOJO_RESULT_OK);
+    CHECK_EQ(num_bytes, static_cast<uint32_t>(buffer->data_size()));
+  }
+}
+
+void MojoDecryptorService::ReadDataFromDataPipe(
+    const scoped_refptr<DecoderBuffer>& buffer) {
+  if (!buffer->end_of_stream()) {
+    // Read the inner data for the DecoderBuffer from our DataPipe.
+    uint32_t num_bytes = buffer->data_size();
+    DCHECK_GT(num_bytes, 0u);
+    CHECK_EQ(ReadDataRaw(read_pipe_.get(), buffer->writable_data(), &num_bytes,
+                         MOJO_READ_DATA_FLAG_ALL_OR_NONE),
+             MOJO_RESULT_OK);
+    CHECK_EQ(num_bytes, static_cast<uint32_t>(buffer->data_size()));
+  }
+}
+
 }  // namespace media