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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_VIDEO_ENCODER_HOST_H_
#define CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_ENCODER_HOST_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <vector>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "content/common/content_export.h"
#include "content/renderer/pepper/video_encoder_shim.h"
#include "gpu/command_buffer/client/gpu_control_client.h"
#include "ppapi/c/pp_codecs.h"
#include "ppapi/c/ppb_video_frame.h"
#include "ppapi/host/host_message_context.h"
#include "ppapi/host/resource_host.h"
#include "ppapi/proxy/resource_message_params.h"
#include "ppapi/shared_impl/media_stream_buffer_manager.h"
namespace gpu {
class CommandBufferProxyImpl;
}
namespace content {
class RendererPpapiHost;
class CONTENT_EXPORT PepperVideoEncoderHost
: public ppapi::host::ResourceHost,
public VideoEncoderShim::Client,
public ppapi::MediaStreamBufferManager::Delegate,
public gpu::GpuControlClient {
public:
PepperVideoEncoderHost(RendererPpapiHost* host,
PP_Instance instance,
PP_Resource resource);
~PepperVideoEncoderHost() override;
private:
friend class VideoEncoderShim;
// Shared memory buffers.
struct ShmBuffer {
ShmBuffer(uint32_t id, std::unique_ptr<base::SharedMemory> shm);
~ShmBuffer();
media::BitstreamBuffer ToBitstreamBuffer();
// Index of the buffer in the |shm_buffers_|. Buffers have the same id in
// the plugin and the host.
uint32_t id;
std::unique_ptr<base::SharedMemory> shm;
bool in_use;
};
// VideoEncoderShim implementation.
void RequireBitstreamBuffers(unsigned int input_count,
const gfx::Size& input_coded_size,
size_t output_buffer_size) override;
void BitstreamBufferReady(int32_t bitstream_buffer_id,
size_t payload_size,
bool key_frame,
base::TimeDelta timestamp) override;
void NotifyError(media::VideoEncodeAccelerator::Error error) override;
// ResourceHost implementation.
int32_t OnResourceMessageReceived(
const IPC::Message& msg,
ppapi::host::HostMessageContext* context) override;
// GpuControlClient implementation.
void OnGpuControlLostContext() final;
void OnGpuControlLostContextMaybeReentrant() final;
void OnGpuControlErrorMessage(const char* msg, int id) final {}
int32_t OnHostMsgGetSupportedProfiles(
ppapi::host::HostMessageContext* context);
int32_t OnHostMsgInitialize(ppapi::host::HostMessageContext* context,
PP_VideoFrame_Format input_format,
const PP_Size& input_visible_size,
PP_VideoProfile output_profile,
uint32_t initial_bitrate,
PP_HardwareAcceleration acceleration);
int32_t OnHostMsgGetVideoFrames(ppapi::host::HostMessageContext* context);
int32_t OnHostMsgEncode(ppapi::host::HostMessageContext* context,
uint32_t frame_id,
bool force_keyframe);
int32_t OnHostMsgRecycleBitstreamBuffer(
ppapi::host::HostMessageContext* context,
uint32_t buffer_id);
int32_t OnHostMsgRequestEncodingParametersChange(
ppapi::host::HostMessageContext* context,
uint32_t bitrate,
uint32_t framerate);
int32_t OnHostMsgClose(ppapi::host::HostMessageContext* context);
// Internal methods.
void GetSupportedProfiles(
std::vector<PP_VideoProfileDescription>* pp_profiles);
bool IsInitializationValid(const PP_Size& input_size,
PP_VideoProfile ouput_profile,
PP_HardwareAcceleration acceleration);
bool EnsureGpuChannel();
bool InitializeHardware(media::VideoPixelFormat input_format,
const gfx::Size& input_visible_size,
media::VideoCodecProfile output_profile,
uint32_t initial_bitrate);
void Close();
void AllocateVideoFrames();
void SendGetFramesErrorReply(int32_t error);
scoped_refptr<media::VideoFrame> CreateVideoFrame(
uint32_t frame_id,
const ppapi::host::ReplyMessageContext& reply_context);
void FrameReleased(const ppapi::host::ReplyMessageContext& reply_context,
uint32_t frame_id);
void NotifyPepperError(int32_t error);
// Helper method for VideoEncoderShim.
uint8_t* ShmHandleToAddress(int32_t buffer_id);
// Non-owning pointer.
RendererPpapiHost* renderer_ppapi_host_;
std::vector<std::unique_ptr<ShmBuffer>> shm_buffers_;
// Buffer manager for shared memory that holds video frames.
ppapi::MediaStreamBufferManager buffer_manager_;
std::unique_ptr<gpu::CommandBufferProxyImpl> command_buffer_;
std::unique_ptr<VideoEncoderShim> encoder_;
// Whether the encoder has been successfully initialized.
bool initialized_;
// Saved context to answer an Initialize message from the plugin.
ppapi::host::ReplyMessageContext initialize_reply_context_;
// Saved context to answer a GetVideoFrames message from the plugin.
ppapi::host::ReplyMessageContext get_video_frames_reply_context_;
// 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_;
// Size of the frames allocated for the encoder (matching hardware
// constraints).
gfx::Size input_coded_size_;
// Number of frames the encoder needs.
uint32_t frame_count_;
// Format of the frames to give to the encoder.
media::VideoPixelFormat media_input_format_;
#if DCHECK_IS_ON()
bool lost_context_ = false;
#endif
base::WeakPtrFactory<PepperVideoEncoderHost> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(PepperVideoEncoderHost);
};
} // namespace content
#endif // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_ENCODER_HOST_H_
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