ppapi: implement PPB_AudioEncoder

ppapi/proxy/audio_encoder_resource.h

+// 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.
+
+#ifndef PPAPI_PROXY_AUDIO_ENCODER_RESOURCE_H_
+#define PPAPI_PROXY_AUDIO_ENCODER_RESOURCE_H_
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
+#include "ppapi/proxy/connection.h"
+#include "ppapi/proxy/plugin_resource.h"
+#include "ppapi/shared_impl/media_stream_buffer_manager.h"
+#include "ppapi/shared_impl/resource.h"
+#include "ppapi/thunk/ppb_audio_encoder_api.h"
+
+namespace ppapi {
+
+class TrackedCallback;
+
+namespace proxy {
+
+class AudioBufferResource;
+
+class PPAPI_PROXY_EXPORT AudioEncoderResource
+    : public PluginResource,
+      public thunk::PPB_AudioEncoder_API,
+      public ppapi::MediaStreamBufferManager::Delegate {
+ public:
+  AudioEncoderResource(Connection connection, PP_Instance instance);
+  ~AudioEncoderResource() override;
+
+  thunk::PPB_AudioEncoder_API* AsPPB_AudioEncoder_API() override;
+
+ private:
+  class BitstreamBufferManager;
+
+  // MediaStreamBufferManager::Delegate implementation.
+  void OnNewBufferEnqueued() override {}
+
+  // PPB_AduioEncoder_API implementation.
+  int32_t GetSupportedProfiles(
+      const PP_ArrayOutput& output,
+      const scoped_refptr<TrackedCallback>& callback) override;
+  int32_t Initialize(uint32_t channels,
+                     PP_AudioBuffer_SampleRate input_sample_rate,
+                     PP_AudioBuffer_SampleSize input_sample_size,
+                     PP_AudioProfile output_profile,
+                     uint32_t initial_bitrate,
+                     PP_HardwareAcceleration acceleration,
+                     const scoped_refptr<TrackedCallback>& callback) override;
+  int32_t GetNumberOfSamples() override;
+  int32_t GetBuffer(PP_Resource* audio_buffer,
+                    const scoped_refptr<TrackedCallback>& callback) override;
+  int32_t Encode(PP_Resource audio_buffer,
+                 const scoped_refptr<TrackedCallback>& callback) override;
+  int32_t GetBitstreamBuffer(
+      PP_AudioBitstreamBuffer* bitstream_buffer,
+      const scoped_refptr<TrackedCallback>& callback) override;
+  void RecycleBitstreamBuffer(
+      const PP_AudioBitstreamBuffer* bitstream_buffer) override;
+  void RequestBitrateChange(uint32_t bitrate) override;
+  void Close() override;
+
+  // PluginResource implementation.
+  void OnReplyReceived(const ResourceMessageReplyParams& params,
+                       const IPC::Message& msg) override;
+
+  // Message handlers for the host's messages.
+  void OnPluginMsgGetSupportedProfilesReply(
+      const PP_ArrayOutput& output,
+      const ResourceMessageReplyParams& params,
+      const std::vector<PP_AudioProfileDescription>& profiles);
+  void OnPluginMsgInitializeReply(const ResourceMessageReplyParams& params,
+                                  uint32_t number_of_samples,
+                                  uint32_t buffer_count,
+                                  uint32_t buffer_size);
+  void OnPluginMsgGetAudioFramesReply(const ResourceMessageReplyParams& params,
+                                      uint32_t frame_count,
+                                      uint32_t frame_length);
+  void OnPluginMsgEncodeReply(const ResourceMessageReplyParams& params,
+                              uint32_t buffer_id);
+  void OnPluginMsgBitstreamBufferReady(const ResourceMessageReplyParams& params,
+                                       uint32_t buffer_id,
+                                       uint32_t buffer_size);
+  void OnPluginMsgNotifyError(const ResourceMessageReplyParams& params,
+                              int32_t error);
+
+  // Internal utility functions.
+  void NotifyError(int32_t error);
+  void TryWriteAudioBuffer();
+  void TryWriteBitstreamBuffer();
+  void ReleaseBuffers();
+
+  int32_t encoder_last_error_;
+
+  bool initialized_;
+  bool closed_;
+
+  uint32_t number_of_samples_;
+
+  typedef std::map<PP_Resource, scoped_refptr<AudioBufferResource> >
+      AudioBufferMap;
+  AudioBufferMap audio_buffers_;
+
+  scoped_refptr<TrackedCallback> get_supported_profiles_callback_;
+  scoped_refptr<TrackedCallback> initialize_callback_;
+  scoped_refptr<TrackedCallback> get_buffer_callback_;
+  PP_Resource* get_buffer_data_;
+
+  typedef std::map<int32_t, scoped_refptr<TrackedCallback> > EncodeMap;
+  EncodeMap encode_callbacks_;
+
+  scoped_refptr<TrackedCallback> get_bitstream_buffer_callback_;
+  PP_AudioBitstreamBuffer* get_bitstream_buffer_data_;
+
+  // Buffer manager for audio frames.
+  MediaStreamBufferManager buffer_manager_;
+
+  // Buffer manager for bitstream buffers.
+  scoped_ptr<BitstreamBufferManager> bitstream_buffer_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(AudioEncoderResource);
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PROXY_AUDIO_ENCODER_RESOURCE_H_