Migrate content/common/gpu/media code to media/gpu

media/gpu/v4l2_video_decode_accelerator.h

 // Copyright 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.
 //
 // This file contains an implementation of VideoDecodeAccelerator
 // that utilizes hardware video decoders, which expose Video4Linux 2 API
 // (http://linuxtv.org/downloads/v4l-dvb-apis/).
 
-#ifndef CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_
-#define CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_
+#ifndef MEDIA_GPU_V4L2_VIDEO_DECODE_ACCELERATOR_H_
+#define MEDIA_GPU_V4L2_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <queue>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
-#include "content/common/content_export.h"
-#include "content/common/gpu/media/gpu_video_decode_accelerator_helpers.h"
-#include "content/common/gpu/media/v4l2_device.h"
 #include "media/base/limits.h"
 #include "media/base/video_decoder_config.h"
+#include "media/gpu/gpu_video_decode_accelerator_helpers.h"
+#include "media/gpu/media_gpu_export.h"
+#include "media/gpu/v4l2_device.h"
 #include "media/video/picture.h"
 #include "media/video/video_decode_accelerator.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace media {
 class H264Parser;
 }  // namespace media
 
-namespace content {
+namespace media {
 // This class handles video accelerators directly through a V4L2 device exported
 // by the hardware blocks.
 //
 // The threading model of this class is driven by the fact that it needs to
 // interface two fundamentally different event queues -- the one Chromium
 // provides through MessageLoop, and the one driven by the V4L2 devices which
 // is waited on with epoll().  There are three threads involved in this class:
 //
 // * The child thread, which is the main GPU process thread which calls the
 //   media::VideoDecodeAccelerator entry points.  Calls from this thread
@@ skipping 17 matching lines @@
 // right order, not fiddling with locks.
 // Buffer creation is a two-step process that is serviced partially on the
 // Child thread, because we need to wait for the client to provide textures
 // for the buffers we allocate. We cannot keep the decoder thread running while
 // the client allocates Pictures for us, because we need to REQBUFS first to get
 // the required number of output buffers from the device and that cannot be done
 // unless we free the previous set of buffers, leaving the decoding in a
 // inoperable state for the duration of the wait for Pictures. So to prevent
 // subtle races (esp. if we get Reset() in the meantime), we block the decoder
 // thread while we wait for AssignPictureBuffers from the client.
-class CONTENT_EXPORT V4L2VideoDecodeAccelerator
+class MEDIA_GPU_EXPORT V4L2VideoDecodeAccelerator
     : public media::VideoDecodeAccelerator {
  public:
   V4L2VideoDecodeAccelerator(
       EGLDisplay egl_display,
       const GetGLContextCallback& get_gl_context_cb,
       const MakeGLContextCurrentCallback& make_context_current_cb,
       const scoped_refptr<V4L2Device>& device);
   ~V4L2VideoDecodeAccelerator() override;
 
   // media::VideoDecodeAccelerator implementation.
   // Note: Initialize() and Destroy() are synchronous.
   bool Initialize(const Config& config, Client* client) override;
   void Decode(const media::BitstreamBuffer& bitstream_buffer) override;
   void AssignPictureBuffers(
       const std::vector<media::PictureBuffer>& buffers) override;
   void ReusePictureBuffer(int32_t picture_buffer_id) override;
   void Flush() override;
   void Reset() override;
   void Destroy() override;
   bool TryToSetupDecodeOnSeparateThread(
       const base::WeakPtr<Client>& decode_client,
       const scoped_refptr<base::SingleThreadTaskRunner>& decode_task_runner)
       override;
 
   static media::VideoDecodeAccelerator::SupportedProfiles
-      GetSupportedProfiles();
+  GetSupportedProfiles();
 
  private:
   // These are rather subjectively tuned.
   enum {
     kInputBufferCount = 8,
     // TODO(posciak): determine input buffer size based on level limits.
     // See http://crbug.com/255116.
     // Input bitstream buffer size for up to 1080p streams.
     kInputBufferMaxSizeFor1080p = 1024 * 1024,
     // Input bitstream buffer size for up to 4k streams.
     kInputBufferMaxSizeFor4k = 4 * kInputBufferMaxSizeFor1080p,
     // Number of output buffers to use for each VDA stage above what's required
     // by the decoder (e.g. DPB size, in H264).  We need
     // media::limits::kMaxVideoFrames to fill up the GpuVideoDecode pipeline,
     // and +1 for a frame in transit.
     kDpbOutputBufferExtraCount = media::limits::kMaxVideoFrames + 1,
   };
 
   // Internal state of the decoder.
   enum State {
-    kUninitialized,      // Initialize() not yet called.
-    kInitialized,        // Initialize() returned true; ready to start decoding.
-    kDecoding,           // DecodeBufferInitial() successful; decoding frames.
-    kResetting,          // Presently resetting.
-    kAfterReset,         // After Reset(), ready to start decoding again.
-    kChangingResolution, // Performing resolution change, all remaining
-                         // pre-change frames decoded and processed.
-    kError,              // Error in kDecoding state.
+    kUninitialized,  // Initialize() not yet called.
+    kInitialized,    // Initialize() returned true; ready to start decoding.
+    kDecoding,       // DecodeBufferInitial() successful; decoding frames.
+    kResetting,      // Presently resetting.
+    kAfterReset,     // After Reset(), ready to start decoding again.
+    kChangingResolution,  // Performing resolution change, all remaining
+                          // pre-change frames decoded and processed.
+    kError,               // Error in kDecoding state.
   };
 
   enum BufferId {
     kFlushBufferId = -2  // Buffer id for flush buffer, queued by FlushTask().
   };
 
   // Auto-destruction reference for BitstreamBuffer, for message-passing from
   // Decode() to DecodeTask().
   struct BitstreamBufferRef;
 
   // Auto-destruction reference for EGLSync (for message-passing).
   struct EGLSyncKHRRef;
 
   // Record for decoded pictures that can be sent to PictureReady.
   struct PictureRecord;
 
   // Record for input buffers.
   struct InputRecord {
     InputRecord();
     ~InputRecord();
-    bool at_device;         // held by device.
-    void* address;          // mmap() address.
-    size_t length;          // mmap() length.
-    off_t bytes_used;       // bytes filled in the mmap() segment.
-    int32_t input_id;       // triggering input_id as given to Decode().
+    bool at_device;    // held by device.
+    void* address;     // mmap() address.
+    size_t length;     // mmap() length.
+    off_t bytes_used;  // bytes filled in the mmap() segment.
+    int32_t input_id;  // triggering input_id as given to Decode().
   };
 
   // Record for output buffers.
   struct OutputRecord {
     OutputRecord();
     ~OutputRecord();
     bool at_device;         // held by device.
     bool at_client;         // held by client.
     EGLImageKHR egl_image;  // EGLImageKHR for the output buffer.
     EGLSyncKHR egl_sync;    // sync the compositor's use of the EGLImage.
@@ skipping 196 matching lines @@
   // task execution should complete one buffer.  If we fall behind (due to
   // resource backpressure, etc.), we'll have to schedule more to catch up.
   int decoder_decode_buffer_tasks_scheduled_;
   // Picture buffers held by the client.
   int decoder_frames_at_client_;
   // Are we flushing?
   bool decoder_flushing_;
   // Got a reset request while we were performing resolution change.
   bool resolution_change_reset_pending_;
   // Input queue for decoder_thread_: BitstreamBuffers in.
-  std::queue<linked_ptr<BitstreamBufferRef> > decoder_input_queue_;
+  std::queue<linked_ptr<BitstreamBufferRef>> decoder_input_queue_;
   // For H264 decode, hardware requires that we send it frame-sized chunks.
   // We'll need to parse the stream.
   std::unique_ptr<media::H264Parser> decoder_h264_parser_;
   // Set if the decoder has a pending incomplete frame in an input buffer.
   bool decoder_partial_frame_pending_;
 
   //
   // Hardware state and associated queues.  Since decoder_thread_ services
   // the hardware, decoder_thread_ owns these too.
   // output_buffer_map_, free_output_buffers_ and output_planes_count_ are an
@@ skipping 71 matching lines @@
 
   // Input format V4L2 fourccs this class supports.
   static const uint32_t supported_input_fourccs_[];
 
   // The WeakPtrFactory for |weak_this_|.
   base::WeakPtrFactory<V4L2VideoDecodeAccelerator> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(V4L2VideoDecodeAccelerator);
 };
 
-}  // namespace content
+}  // namespace media
 
-#endif  // CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_
+#endif  // MEDIA_GPU_V4L2_VIDEO_DECODE_ACCELERATOR_H_