1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef MEDIA_BASE_VIDEO_FRAME_H_ 6 #define MEDIA_BASE_VIDEO_FRAME_H_ 7 8 #include "base/callback.h" 9 #include "base/md5.h" 10 #include "base/memory/shared_memory.h" 11 #include "gpu/command_buffer/common/mailbox.h" 12 #include "media/base/buffers.h" 13 #include "ui/gfx/rect.h" 14 #include "ui/gfx/size.h" 15 16 class SkBitmap; 17 18 namespace media { 19 20 class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<VideoFrame> { 21 public: 22 enum { 23 kFrameSizeAlignment = 16, 24 kFrameSizePadding = 16, 25 kFrameAddressAlignment = 32 26 }; 27 28 enum { 29 kMaxPlanes = 4, 30 31 kYPlane = 0, 32 kUPlane = 1, 33 kVPlane = 2, 34 kAPlane = 3, 35 }; 36 37 // Surface formats roughly based on FOURCC labels, see: 38 // http://www.fourcc.org/rgb.php 39 // http://www.fourcc.org/yuv.php 40 // Logged to UMA, so never reuse values. 41 enum Format { 42 UNKNOWN = 0, // Unknown format value. 43 YV12 = 1, // 12bpp YVU planar 1x1 Y, 2x2 VU samples 44 YV16 = 2, // 16bpp YVU planar 1x1 Y, 2x1 VU samples 45 I420 = 3, // 12bpp YVU planar 1x1 Y, 2x2 UV samples. 46 YV12A = 4, // 20bpp YUVA planar 1x1 Y, 2x2 VU, 1x1 A samples. 47 #if defined(VIDEO_HOLE) 48 HOLE = 5, // Hole frame. 49 #endif // defined(VIDEO_HOLE) 50 NATIVE_TEXTURE = 6, // Native texture. Pixel-format agnostic. 51 YV12J = 7, // JPEG color range version of YV12 52 HISTOGRAM_MAX, // Must always be greatest. 53 }; 54 55 // Returns the name of a Format as a string. 56 static std::string FormatToString(Format format); 57 58 // This class calls the TextureNoLongerNeededCallback when this class is 59 // destroyed. Users can query the current sync point associated with this 60 // mailbox with sync_point(), and should call Resync() with a new sync point 61 // to ensure the mailbox remains valid for the issued commands. 62 // valid for the issued commands. 63 class MEDIA_EXPORT MailboxHolder { 64 public: 65 typedef base::Callback<void(uint32 sync_point)> 66 TextureNoLongerNeededCallback; 67 68 MailboxHolder(const gpu::Mailbox& mailbox, 69 unsigned sync_point, 70 const TextureNoLongerNeededCallback& release_callback); 71 ~MailboxHolder(); 72 73 const gpu::Mailbox& mailbox() const { return mailbox_; } 74 unsigned sync_point() const { return sync_point_; } 75 76 void Resync(unsigned sync_point) { sync_point_ = sync_point; } 77 78 private: 79 80 gpu::Mailbox mailbox_; 81 unsigned sync_point_; 82 TextureNoLongerNeededCallback release_callback_; 83 }; 84 85 86 // Creates a new frame in system memory with given parameters. Buffers for 87 // the frame are allocated but not initialized. 88 // |coded_size| is the width and height of the frame data in pixels. 89 // |visible_rect| is the visible portion of |coded_size|, after cropping (if 90 // any) is applied. 91 // |natural_size| is the width and height of the frame when the frame's aspect 92 // ratio is applied to |visible_rect|. 93 static scoped_refptr<VideoFrame> CreateFrame( 94 Format format, 95 const gfx::Size& coded_size, 96 const gfx::Rect& visible_rect, 97 const gfx::Size& natural_size, 98 base::TimeDelta timestamp); 99 100 // Call prior to CreateFrame to ensure validity of frame configuration. Called 101 // automatically by VideoDecoderConfig::IsValidConfig(). 102 // TODO(scherkus): VideoDecoderConfig shouldn't call this method 103 static bool IsValidConfig(Format format, const gfx::Size& coded_size, 104 const gfx::Rect& visible_rect, 105 const gfx::Size& natural_size); 106 107 // CB to write pixels from the texture backing this frame into the 108 // |const SkBitmap&| parameter. 109 typedef base::Callback<void(const SkBitmap&)> ReadPixelsCB; 110 111 // Wraps a native texture of the given parameters with a VideoFrame. When the 112 // frame is destroyed |no_longer_needed_cb.Run()| will be called. 113 // |coded_size| is the width and height of the frame data in pixels. 114 // |visible_rect| is the visible portion of |coded_size|, after cropping (if 115 // any) is applied. 116 // |natural_size| is the width and height of the frame when the frame's aspect 117 // ratio is applied to |visible_rect|. 118 119 // |read_pixels_cb| may be used to do (slow!) readbacks from the 120 // texture to main memory. 121 static scoped_refptr<VideoFrame> WrapNativeTexture( 122 scoped_ptr<MailboxHolder> mailbox_holder, 123 uint32 texture_target, 124 const gfx::Size& coded_size, 125 const gfx::Rect& visible_rect, 126 const gfx::Size& natural_size, 127 base::TimeDelta timestamp, 128 const ReadPixelsCB& read_pixels_cb, 129 const base::Closure& no_longer_needed_cb); 130 131 // Read pixels from the native texture backing |*this| and write 132 // them to |pixels| as BGRA. |pixels| must point to a buffer at 133 // least as large as 4*visible_rect().width()*visible_rect().height(). 134 void ReadPixelsFromNativeTexture(const SkBitmap& pixels); 135 136 // Wraps packed image data residing in a memory buffer with a VideoFrame. 137 // The image data resides in |data| and is assumed to be packed tightly in a 138 // buffer of logical dimensions |coded_size| with the appropriate bit depth 139 // and plane count as given by |format|. The shared memory handle of the 140 // backing allocation, if present, can be passed in with |handle|. When the 141 // frame is destroyed, |no_longer_needed_cb.Run()| will be called. 142 static scoped_refptr<VideoFrame> WrapExternalPackedMemory( 143 Format format, 144 const gfx::Size& coded_size, 145 const gfx::Rect& visible_rect, 146 const gfx::Size& natural_size, 147 uint8* data, 148 size_t data_size, 149 base::SharedMemoryHandle handle, 150 base::TimeDelta timestamp, 151 const base::Closure& no_longer_needed_cb); 152 153 // Wraps external YUV data of the given parameters with a VideoFrame. 154 // The returned VideoFrame does not own the data passed in. When the frame 155 // is destroyed |no_longer_needed_cb.Run()| will be called. 156 // TODO(sheu): merge this into WrapExternalSharedMemory(). 157 // http://crbug.com/270217 158 static scoped_refptr<VideoFrame> WrapExternalYuvData( 159 Format format, 160 const gfx::Size& coded_size, 161 const gfx::Rect& visible_rect, 162 const gfx::Size& natural_size, 163 int32 y_stride, 164 int32 u_stride, 165 int32 v_stride, 166 uint8* y_data, 167 uint8* u_data, 168 uint8* v_data, 169 base::TimeDelta timestamp, 170 const base::Closure& no_longer_needed_cb); 171 172 // Wraps |frame| and calls |no_longer_needed_cb| when the wrapper VideoFrame 173 // gets destroyed. 174 static scoped_refptr<VideoFrame> WrapVideoFrame( 175 const scoped_refptr<VideoFrame>& frame, 176 const base::Closure& no_longer_needed_cb); 177 178 // Creates a frame which indicates end-of-stream. 179 static scoped_refptr<VideoFrame> CreateEOSFrame(); 180 181 // Allocates YV12 frame based on |size|, and sets its data to the YUV(y,u,v). 182 static scoped_refptr<VideoFrame> CreateColorFrame( 183 const gfx::Size& size, 184 uint8 y, uint8 u, uint8 v, 185 base::TimeDelta timestamp); 186 187 // Allocates YV12 frame based on |size|, and sets its data to the YUV 188 // equivalent of RGB(0,0,0). 189 static scoped_refptr<VideoFrame> CreateBlackFrame(const gfx::Size& size); 190 191 #if defined(VIDEO_HOLE) 192 // Allocates a hole frame. 193 static scoped_refptr<VideoFrame> CreateHoleFrame(const gfx::Size& size); 194 #endif // defined(VIDEO_HOLE) 195 196 static size_t NumPlanes(Format format); 197 198 // Returns the required allocation size for a (tightly packed) frame of the 199 // given coded size and format. 200 static size_t AllocationSize(Format format, const gfx::Size& coded_size); 201 202 // Returns the required allocation size for a (tightly packed) plane of the 203 // given coded size and format. 204 static size_t PlaneAllocationSize(Format format, 205 size_t plane, 206 const gfx::Size& coded_size); 207 208 Format format() const { return format_; } 209 210 const gfx::Size& coded_size() const { return coded_size_; } 211 const gfx::Rect& visible_rect() const { return visible_rect_; } 212 const gfx::Size& natural_size() const { return natural_size_; } 213 214 int stride(size_t plane) const; 215 216 // Returns the number of bytes per row and number of rows for a given plane. 217 // 218 // As opposed to stride(), row_bytes() refers to the bytes representing 219 // frame data scanlines (coded_size.width() pixels, without stride padding). 220 int row_bytes(size_t plane) const; 221 int rows(size_t plane) const; 222 223 // Returns pointer to the buffer for a given plane. The memory is owned by 224 // VideoFrame object and must not be freed by the caller. 225 uint8* data(size_t plane) const; 226 227 // Returns the mailbox of the native texture wrapped by this frame. Only 228 // valid to call if this is a NATIVE_TEXTURE frame. Before using the 229 // mailbox, the caller must wait for the included sync point. 230 MailboxHolder* texture_mailbox() const; 231 232 // Returns the texture target. Only valid for NATIVE_TEXTURE frames. 233 uint32 texture_target() const; 234 235 // Returns the shared-memory handle, if present 236 base::SharedMemoryHandle shared_memory_handle() const; 237 238 // Returns true if this VideoFrame represents the end of the stream. 239 bool end_of_stream() const { return end_of_stream_; } 240 241 base::TimeDelta GetTimestamp() const { 242 return timestamp_; 243 } 244 void SetTimestamp(const base::TimeDelta& timestamp) { 245 timestamp_ = timestamp; 246 } 247 248 // Used to keep a running hash of seen frames. Expects an initialized MD5 249 // context. Calls MD5Update with the context and the contents of the frame. 250 void HashFrameForTesting(base::MD5Context* context); 251 252 private: 253 friend class base::RefCountedThreadSafe<VideoFrame>; 254 // Clients must use the static CreateFrame() method to create a new frame. 255 VideoFrame(Format format, 256 const gfx::Size& coded_size, 257 const gfx::Rect& visible_rect, 258 const gfx::Size& natural_size, 259 base::TimeDelta timestamp, 260 bool end_of_stream); 261 virtual ~VideoFrame(); 262 263 void AllocateYUV(); 264 265 // Used to DCHECK() plane parameters. 266 bool IsValidPlane(size_t plane) const; 267 268 // Frame format. 269 Format format_; 270 271 // Width and height of the video frame. 272 gfx::Size coded_size_; 273 274 // Width, height, and offsets of the visible portion of the video frame. 275 gfx::Rect visible_rect_; 276 277 // Width and height of the visible portion of the video frame with aspect 278 // ratio taken into account. 279 gfx::Size natural_size_; 280 281 // Array of strides for each plane, typically greater or equal to the width 282 // of the surface divided by the horizontal sampling period. Note that 283 // strides can be negative. 284 int32 strides_[kMaxPlanes]; 285 286 // Array of data pointers to each plane. 287 uint8* data_[kMaxPlanes]; 288 289 // Native texture mailbox, if this is a NATIVE_TEXTURE frame. 290 scoped_ptr<MailboxHolder> texture_mailbox_holder_; 291 uint32 texture_target_; 292 ReadPixelsCB read_pixels_cb_; 293 294 // Shared memory handle, if this frame was allocated from shared memory. 295 base::SharedMemoryHandle shared_memory_handle_; 296 297 base::Closure no_longer_needed_cb_; 298 299 base::TimeDelta timestamp_; 300 301 const bool end_of_stream_; 302 303 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoFrame); 304 }; 305 306 } // namespace media 307 308 #endif // MEDIA_BASE_VIDEO_FRAME_H_ 309
