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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 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 #include "webkit/media/skcanvas_video_renderer.h" | 5 #include "webkit/media/skcanvas_video_renderer.h" |
6 | 6 |
7 #include "base/logging.h" | 7 #include "base/logging.h" |
8 #include "media/base/video_frame.h" | 8 #include "media/base/video_frame.h" |
9 #include "media/base/yuv_convert.h" | 9 #include "media/base/yuv_convert.h" |
10 #include "third_party/skia/include/core/SkCanvas.h" | 10 #include "third_party/skia/include/core/SkCanvas.h" |
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102 // Project the clip rect to the original video frame, obtains the | 102 // Project the clip rect to the original video frame, obtains the |
103 // dimensions of the projected clip rect, "left" and "top" of the rect. | 103 // dimensions of the projected clip rect, "left" and "top" of the rect. |
104 // The math here are all integer math so we won't have rounding error and | 104 // The math here are all integer math so we won't have rounding error and |
105 // write outside of the canvas. | 105 // write outside of the canvas. |
106 // We have the assumptions of dest_rect.width() and dest_rect.height() | 106 // We have the assumptions of dest_rect.width() and dest_rect.height() |
107 // being non-zero, these are valid assumptions since finding intersection | 107 // being non-zero, these are valid assumptions since finding intersection |
108 // above rejects empty rectangle so we just do a DCHECK here. | 108 // above rejects empty rectangle so we just do a DCHECK here. |
109 DCHECK_NE(0, dest_rect.width()); | 109 DCHECK_NE(0, dest_rect.width()); |
110 DCHECK_NE(0, dest_rect.height()); | 110 DCHECK_NE(0, dest_rect.height()); |
111 size_t frame_clip_width = local_dest_irect.width() * | 111 size_t frame_clip_width = local_dest_irect.width() * |
112 video_frame->width() / local_dest_irect_saved.width(); | 112 video_frame->data_size().width() / local_dest_irect_saved.width(); |
113 size_t frame_clip_height = local_dest_irect.height() * | 113 size_t frame_clip_height = local_dest_irect.height() * |
114 video_frame->height() / local_dest_irect_saved.height(); | 114 video_frame->data_size().height() / local_dest_irect_saved.height(); |
115 | 115 |
116 // Project the "left" and "top" of the final destination rect to local | 116 // Project the "left" and "top" of the final destination rect to local |
117 // coordinates of the video frame, use these values to find the offsets | 117 // coordinates of the video frame, use these values to find the offsets |
118 // in the video frame to start reading. | 118 // in the video frame to start reading. |
119 size_t frame_clip_left = | 119 size_t frame_clip_left = |
120 (local_dest_irect.fLeft - local_dest_irect_saved.fLeft) * | 120 (local_dest_irect.fLeft - local_dest_irect_saved.fLeft) * |
121 video_frame->width() / local_dest_irect_saved.width(); | 121 video_frame->data_size().width() / local_dest_irect_saved.width(); |
122 size_t frame_clip_top = | 122 size_t frame_clip_top = |
123 (local_dest_irect.fTop - local_dest_irect_saved.fTop) * | 123 (local_dest_irect.fTop - local_dest_irect_saved.fTop) * |
124 video_frame->height() / local_dest_irect_saved.height(); | 124 video_frame->data_size().height() / local_dest_irect_saved.height(); |
125 | 125 |
126 // Use the "left" and "top" of the destination rect to locate the offset | 126 // Use the "left" and "top" of the destination rect to locate the offset |
127 // in Y, U and V planes. | 127 // in Y, U and V planes. |
128 size_t y_offset = video_frame->stride(media::VideoFrame::kYPlane) * | 128 size_t y_offset = video_frame->stride(media::VideoFrame::kYPlane) * |
129 frame_clip_top + frame_clip_left; | 129 frame_clip_top + frame_clip_left; |
130 | 130 |
131 // For format YV12, there is one U, V value per 2x2 block. | 131 // For format YV12, there is one U, V value per 2x2 block. |
132 // For format YV16, there is one u, V value per 2x1 block. | 132 // For format YV16, there is one u, V value per 2x1 block. |
133 size_t uv_offset = (video_frame->stride(media::VideoFrame::kUPlane) * | 133 size_t uv_offset = (video_frame->stride(media::VideoFrame::kUPlane) * |
134 (frame_clip_top >> y_shift)) + (frame_clip_left >> 1); | 134 (frame_clip_top >> y_shift)) + (frame_clip_left >> 1); |
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164 // |bitmap| will be (re)allocated to match the dimensions of |video_frame|. | 164 // |bitmap| will be (re)allocated to match the dimensions of |video_frame|. |
165 static void ConvertVideoFrameToBitmap( | 165 static void ConvertVideoFrameToBitmap( |
166 const scoped_refptr<media::VideoFrame>& video_frame, | 166 const scoped_refptr<media::VideoFrame>& video_frame, |
167 SkBitmap* bitmap) { | 167 SkBitmap* bitmap) { |
168 DCHECK(IsEitherYV12OrYV16(video_frame->format())) << video_frame->format(); | 168 DCHECK(IsEitherYV12OrYV16(video_frame->format())) << video_frame->format(); |
169 DCHECK(video_frame->stride(media::VideoFrame::kUPlane) == | 169 DCHECK(video_frame->stride(media::VideoFrame::kUPlane) == |
170 video_frame->stride(media::VideoFrame::kVPlane)); | 170 video_frame->stride(media::VideoFrame::kVPlane)); |
171 | 171 |
172 // Check if |bitmap| needs to be (re)allocated. | 172 // Check if |bitmap| needs to be (re)allocated. |
173 if (bitmap->isNull() || | 173 if (bitmap->isNull() || |
174 bitmap->width() != static_cast<int>(video_frame->width()) || | 174 bitmap->width() != video_frame->data_size().width() || |
175 bitmap->height() != static_cast<int>(video_frame->height())) { | 175 bitmap->height() != video_frame->data_size().height()) { |
176 bitmap->setConfig(SkBitmap::kARGB_8888_Config, | 176 bitmap->setConfig(SkBitmap::kARGB_8888_Config, |
177 video_frame->width(), | 177 video_frame->data_size().width(), |
178 video_frame->height()); | 178 video_frame->data_size().height()); |
179 bitmap->allocPixels(); | 179 bitmap->allocPixels(); |
180 bitmap->setIsVolatile(true); | 180 bitmap->setIsVolatile(true); |
181 } | 181 } |
182 | 182 |
183 bitmap->lockPixels(); | 183 bitmap->lockPixels(); |
184 media::YUVType yuv_type = | 184 media::YUVType yuv_type = |
185 (video_frame->format() == media::VideoFrame::YV12) ? | 185 (video_frame->format() == media::VideoFrame::YV12) ? |
186 media::YV12 : media::YV16; | 186 media::YV12 : media::YV16; |
187 media::ConvertYUVToRGB32(video_frame->data(media::VideoFrame::kYPlane), | 187 media::ConvertYUVToRGB32(video_frame->data(media::VideoFrame::kYPlane), |
188 video_frame->data(media::VideoFrame::kUPlane), | 188 video_frame->data(media::VideoFrame::kUPlane), |
189 video_frame->data(media::VideoFrame::kVPlane), | 189 video_frame->data(media::VideoFrame::kVPlane), |
190 static_cast<uint8*>(bitmap->getPixels()), | 190 static_cast<uint8*>(bitmap->getPixels()), |
191 video_frame->width(), | 191 video_frame->data_size().width(), |
192 video_frame->height(), | 192 video_frame->data_size().height(), |
193 video_frame->stride(media::VideoFrame::kYPlane), | 193 video_frame->stride(media::VideoFrame::kYPlane), |
194 video_frame->stride(media::VideoFrame::kUPlane), | 194 video_frame->stride(media::VideoFrame::kUPlane), |
195 bitmap->rowBytes(), | 195 bitmap->rowBytes(), |
196 yuv_type); | 196 yuv_type); |
197 bitmap->notifyPixelsChanged(); | 197 bitmap->notifyPixelsChanged(); |
198 bitmap->unlockPixels(); | 198 bitmap->unlockPixels(); |
199 } | 199 } |
200 | 200 |
201 SkCanvasVideoRenderer::SkCanvasVideoRenderer() | 201 SkCanvasVideoRenderer::SkCanvasVideoRenderer() |
202 : last_frame_timestamp_(media::kNoTimestamp()) { | 202 : last_frame_timestamp_(media::kNoTimestamp()) { |
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239 ConvertVideoFrameToBitmap(video_frame, &last_frame_); | 239 ConvertVideoFrameToBitmap(video_frame, &last_frame_); |
240 last_frame_timestamp_ = video_frame->GetTimestamp(); | 240 last_frame_timestamp_ = video_frame->GetTimestamp(); |
241 } | 241 } |
242 | 242 |
243 // Do a slower paint using |last_frame_|. | 243 // Do a slower paint using |last_frame_|. |
244 paint.setFilterBitmap(true); | 244 paint.setFilterBitmap(true); |
245 canvas->drawBitmapRect(last_frame_, NULL, dest, &paint); | 245 canvas->drawBitmapRect(last_frame_, NULL, dest, &paint); |
246 } | 246 } |
247 | 247 |
248 } // namespace webkit_media | 248 } // namespace webkit_media |
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