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// 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 CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_ENCODER_HOST_H_
#define CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_ENCODER_HOST_H_
#include <stdint.h>
#include <memory>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/numerics/safe_math.h"
#include "content/common/content_export.h"
#include "ppapi/c/pp_codecs.h"
#include "ppapi/host/host_message_context.h"
#include "ppapi/host/resource_host.h"
#include "ppapi/proxy/resource_message_params.h"
#include "ppapi/proxy/serialized_structs.h"
#include "ppapi/shared_impl/media_stream_buffer_manager.h"
namespace content {
class RendererPpapiHost;
class CONTENT_EXPORT PepperAudioEncoderHost
: public ppapi::host::ResourceHost,
public ppapi::MediaStreamBufferManager::Delegate {
public:
PepperAudioEncoderHost(RendererPpapiHost* host,
PP_Instance instance,
PP_Resource resource);
~PepperAudioEncoderHost() override;
private:
class AudioEncoderImpl;
// ResourceHost implementation.
int32_t OnResourceMessageReceived(
const IPC::Message& msg,
ppapi::host::HostMessageContext* context) override;
int32_t OnHostMsgGetSupportedProfiles(
ppapi::host::HostMessageContext* context);
int32_t OnHostMsgInitialize(
ppapi::host::HostMessageContext* context,
const ppapi::proxy::PPB_AudioEncodeParameters& parameters);
int32_t OnHostMsgGetAudioBuffers(ppapi::host::HostMessageContext* context);
int32_t OnHostMsgEncode(ppapi::host::HostMessageContext* context,
int32_t buffer_id);
int32_t OnHostMsgRecycleBitstreamBuffer(
ppapi::host::HostMessageContext* context,
int32_t buffer_id);
int32_t OnHostMsgRequestBitrateChange(
ppapi::host::HostMessageContext* context,
uint32_t bitrate);
int32_t OnHostMsgClose(ppapi::host::HostMessageContext* context);
void GetSupportedProfiles(std::vector<PP_AudioProfileDescription>* profiles);
bool IsInitializationValid(
const ppapi::proxy::PPB_AudioEncodeParameters& parameters);
bool AllocateBuffers(
const ppapi::proxy::PPB_AudioEncodeParameters& parameters,
int32_t samples_per_frame);
void DoEncode();
void BitstreamBufferReady(int32_t audio_buffer_id,
int32_t bitstream_buffer_id,
int32_t size);
void NotifyPepperError(int32_t error);
void Close();
static void StopAudioEncoder(
std::unique_ptr<AudioEncoderImpl> encoder,
std::unique_ptr<ppapi::MediaStreamBufferManager> audio_buffer_manager,
std::unique_ptr<ppapi::MediaStreamBufferManager>
bitstream_buffer_manager);
// Non-owning pointer.
RendererPpapiHost* renderer_ppapi_host_;
// Whether the encoder has been successfully initialized.
bool initialized_;
// Last error reported by the encoder.
// This represents the current error state of the encoder, i.e. PP_OK
// normally, or a Pepper error code if the encoder is uninitialized,
// has been notified of an encoder error, has encountered some
// other unrecoverable error, or has been closed by the plugin.
// This field is checked in most message handlers to decide whether
// operations should proceed or fail.
int32_t encoder_last_error_;
// Manages buffers containing audio samples from the plugin.
std::unique_ptr<ppapi::MediaStreamBufferManager> audio_buffer_manager_;
// Manages buffers containing encoded audio from the browser.
std::unique_ptr<ppapi::MediaStreamBufferManager> bitstream_buffer_manager_;
// Media task runner used to run the encoder.
scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
// The encoder actually doing the work.
std::unique_ptr<AudioEncoderImpl> encoder_;
base::WeakPtrFactory<PepperAudioEncoderHost> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(PepperAudioEncoderHost);
};
} // namespace content
#endif // CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_ENCODER_HOST_H_
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