| // 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. |
| |
| #ifndef CONTENT_COMMON_GPU_MEDIA_ANDROID_VIDEO_DECODE_ACCELERATOR_H_ |
| #define CONTENT_COMMON_GPU_MEDIA_ANDROID_VIDEO_DECODE_ACCELERATOR_H_ |
| |
| #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 "content/common/gpu/media/video_decode_accelerator_impl.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. http://developer.android.com/reference/android/media/MediaCodec.html |
| class CONTENT_EXPORT AndroidVideoDecodeAccelerator |
| : public VideoDecodeAcceleratorImpl { |
| public: |
| // Does not take ownership of |client| which must outlive |*this|. |
| AndroidVideoDecodeAccelerator( |
| media::VideoDecodeAccelerator::Client* client, |
| const base::WeakPtr<gpu::gles2::GLES2Decoder> decoder, |
| const base::Callback<bool(void)>& make_context_current); |
| |
| // media::VideoDecodeAccelerator implementation. |
| virtual bool Initialize(media::VideoCodecProfile profile) 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; |
| |
| private: |
| enum State { |
| NO_ERROR, |
| ERROR, |
| }; |
| |
| 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(); |
| |
| // Notifies the client that initialize was completed. |
| void NotifyInitializeDone(); |
| |
| // 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; |
| 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_; |
| |
| friend class AndroidVideoDecodeAcceleratorTest; |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_COMMON_GPU_MEDIA_ANDROID_VIDEO_DECODE_ACCELERATOR_H_ |