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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 // | 4 // |
5 // This file contains an implementation of VideoDecodeAccelerator | 5 // This file contains an implementation of VideoDecodeAccelerator |
6 // that utilizes hardware video decoders, which expose Video4Linux 2 API | 6 // that utilizes hardware video decoders, which expose Video4Linux 2 API |
7 // (http://linuxtv.org/downloads/v4l-dvb-apis/). | 7 // (http://linuxtv.org/downloads/v4l-dvb-apis/). |
8 | 8 |
9 #ifndef CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_ | 9 #ifndef CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_ |
10 #define CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_ | 10 #define CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_ |
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148 off_t bytes_used; // bytes filled in the mmap() segment. | 148 off_t bytes_used; // bytes filled in the mmap() segment. |
149 int32 input_id; // triggering input_id as given to Decode(). | 149 int32 input_id; // triggering input_id as given to Decode(). |
150 }; | 150 }; |
151 | 151 |
152 // Record for output buffers. | 152 // Record for output buffers. |
153 struct OutputRecord { | 153 struct OutputRecord { |
154 OutputRecord(); | 154 OutputRecord(); |
155 ~OutputRecord(); | 155 ~OutputRecord(); |
156 bool at_device; // held by device. | 156 bool at_device; // held by device. |
157 bool at_client; // held by client. | 157 bool at_client; // held by client. |
158 int fds[2]; // file descriptors for each plane. | |
159 EGLImageKHR egl_image; // EGLImageKHR for the output buffer. | 158 EGLImageKHR egl_image; // EGLImageKHR for the output buffer. |
160 EGLSyncKHR egl_sync; // sync the compositor's use of the EGLImage. | 159 EGLSyncKHR egl_sync; // sync the compositor's use of the EGLImage. |
161 int32 picture_id; // picture buffer id as returned to PictureReady(). | 160 int32 picture_id; // picture buffer id as returned to PictureReady(). |
162 bool cleared; // Whether the texture is cleared and safe to render | 161 bool cleared; // Whether the texture is cleared and safe to render |
163 // from. See TextureManager for details. | 162 // from. See TextureManager for details. |
164 }; | 163 }; |
165 | 164 |
166 // | 165 // |
167 // Decoding tasks, to be run on decode_thread_. | 166 // Decoding tasks, to be run on decode_thread_. |
168 // | 167 // |
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287 // caller can error out on resolution change. | 286 // caller can error out on resolution change. |
288 bool DestroyOutputBuffers(); | 287 bool DestroyOutputBuffers(); |
289 void ResolutionChangeDestroyBuffers(); | 288 void ResolutionChangeDestroyBuffers(); |
290 | 289 |
291 // Send decoded pictures to PictureReady. | 290 // Send decoded pictures to PictureReady. |
292 void SendPictureReady(); | 291 void SendPictureReady(); |
293 | 292 |
294 // Callback that indicates a picture has been cleared. | 293 // Callback that indicates a picture has been cleared. |
295 void PictureCleared(); | 294 void PictureCleared(); |
296 | 295 |
296 // This method determines whether a resolution change event processing | |
297 // is indeed required by returning true if either: | |
298 // - width or height of the new format is different than previous format. | |
299 // - V4L2_CID_MIN_BUFFERS_FOR_CAPTURE has changed. | |
300 // Returns false otherwise. | |
301 bool IsResolutionChangeNecessary(); | |
302 | |
297 // Our original calling message loop for the child thread. | 303 // Our original calling message loop for the child thread. |
298 scoped_refptr<base::MessageLoopProxy> child_message_loop_proxy_; | 304 scoped_refptr<base::MessageLoopProxy> child_message_loop_proxy_; |
299 | 305 |
300 // Message loop of the IO thread. | 306 // Message loop of the IO thread. |
301 scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_; | 307 scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_; |
302 | 308 |
303 // WeakPtr<> pointing to |this| for use in posting tasks from the decoder or | 309 // WeakPtr<> pointing to |this| for use in posting tasks from the decoder or |
304 // device worker threads back to the child thread. Because the worker threads | 310 // device worker threads back to the child thread. Because the worker threads |
305 // are members of this class, any task running on those threads is guaranteed | 311 // are members of this class, any task running on those threads is guaranteed |
306 // that this object is still alive. As a result, tasks posted from the child | 312 // that this object is still alive. As a result, tasks posted from the child |
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419 | 425 |
420 // Make our context current before running any EGL entry points. | 426 // Make our context current before running any EGL entry points. |
421 base::Callback<bool(void)> make_context_current_; | 427 base::Callback<bool(void)> make_context_current_; |
422 | 428 |
423 // EGL state | 429 // EGL state |
424 EGLDisplay egl_display_; | 430 EGLDisplay egl_display_; |
425 | 431 |
426 // The codec we'll be decoding for. | 432 // The codec we'll be decoding for. |
427 media::VideoCodecProfile video_profile_; | 433 media::VideoCodecProfile video_profile_; |
428 | 434 |
435 // Stores the number of planes (i.e. separate memory buffers) for output. | |
436 uint8 output_planes_count_; | |
Pawel Osciak
2014/03/28 06:21:46
s/uint8/size_t/
shivdasp
2014/03/28 06:40:43
Done.
| |
437 | |
429 DISALLOW_COPY_AND_ASSIGN(V4L2VideoDecodeAccelerator); | 438 DISALLOW_COPY_AND_ASSIGN(V4L2VideoDecodeAccelerator); |
430 }; | 439 }; |
431 | 440 |
432 } // namespace content | 441 } // namespace content |
433 | 442 |
434 #endif // CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_ | 443 #endif // CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_ |
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