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// Copyright (c) 2014 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_DECODER_HOST_H_
#define CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_DECODER_HOST_H_
#include <stdint.h>
#include <list>
#include <map>
#include <memory>
#include <set>
#include <vector>
#include "base/containers/hash_tables.h"
#include "base/macros.h"
#include "content/common/content_export.h"
#include "media/video/video_decode_accelerator.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"
namespace base {
class SharedMemory;
}
namespace content {
class RendererPpapiHost;
class VideoDecoderShim;
class CONTENT_EXPORT PepperVideoDecoderHost
: public ppapi::host::ResourceHost,
public media::VideoDecodeAccelerator::Client {
public:
PepperVideoDecoderHost(RendererPpapiHost* host,
PP_Instance instance,
PP_Resource resource);
~PepperVideoDecoderHost() override;
private:
enum class PictureBufferState {
ASSIGNED,
IN_USE,
DISMISSED,
};
struct PendingDecode {
PendingDecode(int32_t decode_id,
uint32_t shm_id,
uint32_t size,
const ppapi::host::ReplyMessageContext& reply_context);
~PendingDecode();
const int32_t decode_id;
const uint32_t shm_id;
const uint32_t size;
const ppapi::host::ReplyMessageContext reply_context;
};
typedef std::list<PendingDecode> PendingDecodeList;
friend class VideoDecoderShim;
// ResourceHost implementation.
int32_t OnResourceMessageReceived(
const IPC::Message& msg,
ppapi::host::HostMessageContext* context) override;
// media::VideoDecodeAccelerator::Client implementation.
void ProvidePictureBuffers(uint32_t requested_num_of_buffers,
media::VideoPixelFormat format,
uint32_t textures_per_buffer,
const gfx::Size& dimensions,
uint32_t texture_target) override;
void DismissPictureBuffer(int32_t picture_buffer_id) override;
void PictureReady(const media::Picture& picture) override;
void NotifyEndOfBitstreamBuffer(int32_t bitstream_buffer_id) override;
void NotifyFlushDone() override;
void NotifyResetDone() override;
void NotifyError(media::VideoDecodeAccelerator::Error error) override;
int32_t OnHostMsgInitialize(ppapi::host::HostMessageContext* context,
const ppapi::HostResource& graphics_context,
PP_VideoProfile profile,
PP_HardwareAcceleration acceleration,
uint32_t min_picture_count);
int32_t OnHostMsgGetShm(ppapi::host::HostMessageContext* context,
uint32_t shm_id,
uint32_t shm_size);
int32_t OnHostMsgDecode(ppapi::host::HostMessageContext* context,
uint32_t shm_id,
uint32_t size,
int32_t decode_id);
int32_t OnHostMsgAssignTextures(ppapi::host::HostMessageContext* context,
const PP_Size& size,
const std::vector<uint32_t>& texture_ids);
int32_t OnHostMsgRecyclePicture(ppapi::host::HostMessageContext* context,
uint32_t picture_id);
int32_t OnHostMsgFlush(ppapi::host::HostMessageContext* context);
int32_t OnHostMsgReset(ppapi::host::HostMessageContext* context);
// These methods are needed by VideoDecodeShim, to look like a
// VideoDecodeAccelerator.
const uint8_t* DecodeIdToAddress(uint32_t decode_id);
void RequestTextures(uint32_t requested_num_of_buffers,
const gfx::Size& dimensions,
uint32_t texture_target,
const std::vector<gpu::Mailbox>& mailboxes);
// Tries to initialize software decoder. Returns true on success.
bool TryFallbackToSoftwareDecoder();
PendingDecodeList::iterator GetPendingDecodeById(int32_t decode_id);
// Non-owning pointer.
RendererPpapiHost* renderer_ppapi_host_;
media::VideoCodecProfile profile_;
std::unique_ptr<media::VideoDecodeAccelerator> decoder_;
bool software_fallback_allowed_ = false;
bool software_fallback_used_ = false;
int pending_texture_requests_ = 0;
// Set after software decoder fallback to dismiss all outstanding texture
// requests.
int assign_textures_messages_to_dismiss_ = 0;
// A vector holding our shm buffers, in sync with a similar vector in the
// resource. We use a buffer's index in these vectors as its id on both sides
// of the proxy. Only add buffers or update them in place so as not to
// invalidate these ids.
std::vector<std::unique_ptr<base::SharedMemory>> shm_buffers_;
// A vector of true/false indicating if a shm buffer is in use by the decoder.
// This is parallel to |shm_buffers_|.
std::vector<uint8_t> shm_buffer_busy_;
uint32_t min_picture_count_;
typedef std::map<uint32_t, PictureBufferState> PictureBufferMap;
PictureBufferMap picture_buffer_map_;
// Keeps list of pending decodes.
PendingDecodeList pending_decodes_;
ppapi::host::ReplyMessageContext flush_reply_context_;
ppapi::host::ReplyMessageContext reset_reply_context_;
bool initialized_ = false;
DISALLOW_COPY_AND_ASSIGN(PepperVideoDecoderHost);
};
} // namespace content
#endif // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_DECODER_HOST_H_
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