blob: 0e02ce4c1a8c3cc543af394bfd33ba51ffa8f3d9 [file] [log] [blame]
// Copyright (c) 2013 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 <list>
#include <map>
#include <queue>
#include <string>
#include <vector>
#include "base/compiler_specific.h"
#include "base/threading/thread_checker.h"
#include "base/timer/timer.h"
#include "content/common/content_export.h"
#include "gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h"
#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
#include "media/base/android/media_codec_bridge.h"
#include "media/video/video_decode_accelerator.h"
namespace gfx {
class SurfaceTexture;
namespace content {
// A VideoDecodeAccelerator implementation for Android.
// This class decodes the input encoded stream by using Android's MediaCodec
// class.
class CONTENT_EXPORT AndroidVideoDecodeAccelerator
: public media::VideoDecodeAccelerator {
// Does not take ownership of |client| which must outlive |*this|.
const base::WeakPtr<gpu::gles2::GLES2Decoder> decoder,
const base::Callback<bool(void)>& make_context_current);
// media::VideoDecodeAccelerator implementation.
virtual bool Initialize(media::VideoCodecProfile profile,
Client* client) OVERRIDE;
virtual void Decode(const media::BitstreamBuffer& bitstream_buffer) OVERRIDE;
virtual void AssignPictureBuffers(
const std::vector<media::PictureBuffer>& buffers) OVERRIDE;
virtual void ReusePictureBuffer(int32 picture_buffer_id) OVERRIDE;
virtual void Flush() OVERRIDE;
virtual void Reset() OVERRIDE;
virtual void Destroy() OVERRIDE;
virtual bool CanDecodeOnIOThread() OVERRIDE;
enum State {
static const base::TimeDelta kDecodePollDelay;
virtual ~AndroidVideoDecodeAccelerator();
// Configures |media_codec_| with the given codec parameters from the client.
bool ConfigureMediaCodec();
// Sends the current picture on the surface to the client.
void SendCurrentSurfaceToClient(int32 bitstream_id);
// Does pending IO tasks if any. Once this is called, it polls |media_codec_|
// until it finishes pending tasks. For the polling, |kDecodePollDelay| is
// used.
void DoIOTask();
// Feeds input data to |media_codec_|. This checks
// |pending_bitstream_buffers_| and queues a buffer to |media_codec_|.
void QueueInput();
// Dequeues output from |media_codec_| and feeds the decoded frame to the
// client.
void DequeueOutput();
// Requests picture buffers from the client.
void RequestPictureBuffers();
// Notifies the client about the availability of a picture.
void NotifyPictureReady(const media::Picture& picture);
// Notifies the client that the input buffer identifed by input_buffer_id has
// been processed.
void NotifyEndOfBitstreamBuffer(int input_buffer_id);
// Notifies the client that the decoder was flushed.
void NotifyFlushDone();
// Notifies the client that the decoder was reset.
void NotifyResetDone();
// Notifies about decoding errors.
void NotifyError(media::VideoDecodeAccelerator::Error error);
// Used to DCHECK that we are called on the correct thread.
base::ThreadChecker thread_checker_;
// To expose client callbacks from VideoDecodeAccelerator.
Client* client_;
// Callback to set the correct gl context.
base::Callback<bool(void)> make_context_current_;
// Codec type. Used when we configure media codec.
media::VideoCodec codec_;
// The current state of this class. For now, this is used only for setting
// error state.
State state_;
// This map maintains the picture buffers passed to the client for decoding.
// The key is the picture buffer id.
typedef std::map<int32, media::PictureBuffer> OutputBufferMap;
OutputBufferMap output_picture_buffers_;
// This keeps the free picture buffer ids which can be used for sending
// decoded frames to the client.
std::queue<int32> free_picture_ids_;
// Picture buffer ids which have been dismissed and not yet re-assigned. Used
// to ignore ReusePictureBuffer calls that were in flight when the
// DismissPictureBuffer call was made.
std::set<int32> dismissed_picture_ids_;
// The low-level decoder which Android SDK provides.
scoped_ptr<media::VideoCodecBridge> media_codec_;
// A container of texture. Used to set a texture to |media_codec_|.
scoped_refptr<gfx::SurfaceTexture> surface_texture_;
// The texture id which is set to |surface_texture_|.
uint32 surface_texture_id_;
// Set to true after requesting picture buffers to the client.
bool picturebuffers_requested_;
// The resolution of the stream.
gfx::Size size_;
// Encoded bitstream buffers to be passed to media codec, queued until an
// input buffer is available, along with the time when they were first
// enqueued.
typedef std::queue<std::pair<media::BitstreamBuffer, base::Time> >
PendingBitstreamBuffers pending_bitstream_buffers_;
// Keeps track of bitstream ids notified to the client with
// NotifyEndOfBitstreamBuffer() before getting output from the bitstream.
std::list<int32> bitstreams_notified_in_advance_;
// Owner of the GL context. Used to restore the context state.
base::WeakPtr<gpu::gles2::GLES2Decoder> gl_decoder_;
// Used for copy the texture from |surface_texture_| to picture buffers.
scoped_ptr<gpu::CopyTextureCHROMIUMResourceManager> copier_;
// Repeating timer responsible for draining pending IO to the codec.
base::RepeatingTimer<AndroidVideoDecodeAccelerator> io_timer_;
// WeakPtrFactory for posting tasks back to |this|.
base::WeakPtrFactory<AndroidVideoDecodeAccelerator> weak_this_factory_;
friend class AndroidVideoDecodeAcceleratorTest;
} // namespace content