Implement MojoAudioDecoder

media/mojo/services/mojo_audio_decoder.cc

 // Copyright 2016 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_audio_decoder.h"
 
 #include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
+#include "media/base/cdm_context.h"
+#include "media/mojo/common/media_type_converters.h"
 
 namespace media {
 
 MojoAudioDecoder::MojoAudioDecoder(
     scoped_refptr<base::SingleThreadTaskRunner> task_runner,
     interfaces::AudioDecoderPtr remote_decoder)
-    : task_runner_(task_runner), remote_decoder_(std::move(remote_decoder)) {
+    : task_runner_(task_runner),
+      remote_decoder_(std::move(remote_decoder)),
+      binding_(this),
+      has_connection_error_(false),
+      needs_bitstream_conversion_(false) {
   DVLOG(1) << __FUNCTION__;
 }
 
 MojoAudioDecoder::~MojoAudioDecoder() {
   DVLOG(1) << __FUNCTION__;
 }
 
 std::string MojoAudioDecoder::GetDisplayName() const {
   return "MojoAudioDecoder";
 }
 
 void MojoAudioDecoder::Initialize(const AudioDecoderConfig& config,
                                   CdmContext* cdm_context,
                                   const InitCB& init_cb,
                                   const OutputCB& output_cb) {
   DVLOG(1) << __FUNCTION__;
   DCHECK(task_runner_->BelongsToCurrentThread());
 
-  NOTIMPLEMENTED();
+  // Fail immediately if the stream is encrypted but |cdm_context| is invalid.
+  int cdm_id = (config.is_encrypted() && cdm_context)
+                   ? cdm_context->GetCdmId()
+                   : CdmContext::kInvalidCdmId;
 
-  // Fail initialization while not implemented.
-  task_runner_->PostTask(FROM_HERE, base::Bind(init_cb, false));
+  if (config.is_encrypted() && CdmContext::kInvalidCdmId == cdm_id) {
+    task_runner_->PostTask(FROM_HERE, base::Bind(init_cb, false));
+    return;
+  }
+
+  // If connection error has happened, fail immediately.
+  if (remote_decoder_.encountered_error()) {
+    task_runner_->PostTask(FROM_HERE, base::Bind(init_cb, false));
+    return;
+  }
+
+  // Otherwise, set an error handler to catch the connection error.
+  // Using base::Unretained(this) is safe because |this| owns |remote_decoder_|,
+  // and the error handler can't be invoked once |remote_decoder_| is destroyed.
+  remote_decoder_.set_connection_error_handler(
+      base::Bind(&MojoAudioDecoder::OnConnectionError, base::Unretained(this)));
+
+  init_cb_ = init_cb;
+
+  // Using base::Unretained(this) is safe because |this| owns |remote_decoder_|,
+  // and the callback won't be dispatched if |remote_decoder_| is destroyed.
+  remote_decoder_->Initialize(
+      binding_.CreateInterfacePtrAndBind(),
+      interfaces::AudioDecoderConfig::From(config), cdm_id,
+      base::Bind(&MojoAudioDecoder::OnInitialized, base::Unretained(this)));
 }
 
 void MojoAudioDecoder::Decode(const scoped_refptr<DecoderBuffer>& buffer,
                               const DecodeCB& decode_cb) {
   DVLOG(3) << __FUNCTION__;
   DCHECK(task_runner_->BelongsToCurrentThread());
 
-  NOTIMPLEMENTED();
+  if (has_connection_error_) {
+    task_runner_->PostTask(FROM_HERE, base::Bind(decode_cb, kDecodeError));
+    return;
+  }
 
-  // Actually we can't decode anything.
-  task_runner_->PostTask(FROM_HERE, base::Bind(decode_cb, kDecodeError));
+  DCHECK(decode_cb_.is_null());
+  decode_cb_ = decode_cb;
+
+  // This code won't work because |buffer| is not serialized.
+  // TODO(timav): Serialize DecodeBuffer into data pipe.
+  remote_decoder_->Decode(
+      interfaces::DecoderBuffer::From(buffer),
+      base::Bind(&MojoAudioDecoder::OnDecodeStatus, base::Unretained(this)));
 }
 
 void MojoAudioDecoder::Reset(const base::Closure& closure) {
   DVLOG(2) << __FUNCTION__;
   DCHECK(task_runner_->BelongsToCurrentThread());
 
-  NOTIMPLEMENTED();
+  if (has_connection_error_) {
+    if (!decode_cb_.is_null()) {
+      task_runner_->PostTask(
+          FROM_HERE,
+          base::Bind(base::ResetAndReturn(&decode_cb_), kDecodeError));
+    }
+
+    task_runner_->PostTask(FROM_HERE, closure);
+    return;
+  }
+
+  DCHECK(reset_cb_.is_null());
+  reset_cb_ = closure;
+  remote_decoder_->Reset(
+      base::Bind(&MojoAudioDecoder::OnResetDone, base::Unretained(this)));
 }
 
 bool MojoAudioDecoder::NeedsBitstreamConversion() const {
   DVLOG(1) << __FUNCTION__;
   DCHECK(task_runner_->BelongsToCurrentThread());
 
+  return needs_bitstream_conversion_;
+}
+
+void MojoAudioDecoder::OnBufferDecoded(interfaces::AudioBufferPtr buffer) {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(task_runner_->BelongsToCurrentThread());
+
   NOTIMPLEMENTED();
-  return false;
+}
+
+void MojoAudioDecoder::OnConnectionError() {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(task_runner_->BelongsToCurrentThread());
+
+  has_connection_error_ = true;
+
+  if (!init_cb_.is_null()) {
+    base::ResetAndReturn(&init_cb_).Run(false);
+    return;
+  }
+
+  if (!decode_cb_.is_null())
+    base::ResetAndReturn(&decode_cb_).Run(kDecodeError);
+  if (!reset_cb_.is_null())
+    base::ResetAndReturn(&reset_cb_).Run();
+}
+
+void MojoAudioDecoder::OnInitialized(bool status,
+                                     bool needs_bitstream_conversion) {
+  DVLOG(1) << __FUNCTION__ << ": status:" << status;
+  DCHECK(task_runner_->BelongsToCurrentThread());
+
+  needs_bitstream_conversion_ = needs_bitstream_conversion;
+
+  task_runner_->PostTask(FROM_HERE, base::Bind(init_cb_, status));
+}
+
+static media::AudioDecoder::Status ConvertDecodeStatus(
+    interfaces::AudioDecoder::DecodeStatus status) {
+  switch (status) {
+    case interfaces::AudioDecoder::DecodeStatus::OK:
+      return media::AudioDecoder::kOk;
+    case interfaces::AudioDecoder::DecodeStatus::ABORTED:
+      return media::AudioDecoder::kAborted;
+    case interfaces::AudioDecoder::DecodeStatus::DECODE_ERROR:
+      return media::AudioDecoder::kDecodeError;
+  }
+  NOTREACHED();
+  return media::AudioDecoder::kDecodeError;
+}
+
+void MojoAudioDecoder::OnDecodeStatus(
+    interfaces::AudioDecoder::DecodeStatus status) {
+  DVLOG(1) << __FUNCTION__ << ": status:" << status;
+  DCHECK(task_runner_->BelongsToCurrentThread());
+
+  DCHECK(!decode_cb_.is_null());
+  base::ResetAndReturn(&decode_cb_).Run(ConvertDecodeStatus(status));
+}
+
+void MojoAudioDecoder::OnResetDone() {
+  DVLOG(1) << __FUNCTION__;
+  DCHECK(task_runner_->BelongsToCurrentThread());
+
+  // For pending decodes OnDecodeStatus() should arrive before OnResetDone().
+  DCHECK(decode_cb_.is_null());
+
+  DCHECK(!reset_cb_.is_null());
+  base::ResetAndReturn(&reset_cb_).Run();
 }
 
 }  // namespace media