media/video/picture.h

   1 // Copyright (c) 2011 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_VIDEO_PICTURE_H_
   6 #define MEDIA_VIDEO_PICTURE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "gpu/command_buffer/common/mailbox.h"
  10 #include "media/base/media_export.h"
  11 #include "ui/gfx/geometry/rect.h"
  12 #include "ui/gfx/size.h"
  13
  14 namespace media {
  15
  16 // A picture buffer that is composed of a GLES2 texture.
  17 // This is the media-namespace equivalent of PP_PictureBuffer_Dev.
  18 class MEDIA_EXPORT PictureBuffer {
  19  public:
  20   PictureBuffer(int32 id, gfx::Size size, uint32 texture_id);
  21   PictureBuffer(int32 id,
  22                 gfx::Size size,
  23                 uint32 texture_id,
  24                 const gpu::Mailbox& texture_mailbox);
  25
  26   // Returns the client-specified id of the buffer.
  27   int32 id() const {
  28     return id_;
  29   }
  30
  31   // Returns the size of the buffer.
  32   gfx::Size size() const {
  33     return size_;
  34   }
  35
  36   // Returns the id of the texture.
  37   // NOTE: The texture id in the renderer process corresponds to a different
  38   // texture id in the GPU process.
  39   uint32 texture_id() const {
  40     return texture_id_;
  41   }
  42
  43   const gpu::Mailbox& texture_mailbox() const {
  44     return texture_mailbox_;
  45   }
  46
  47  private:
  48   int32 id_;
  49   gfx::Size size_;
  50   uint32 texture_id_;
  51   gpu::Mailbox texture_mailbox_;
  52 };
  53
  54 // A decoded picture frame.
  55 // This is the media-namespace equivalent of PP_Picture_Dev.
  56 class MEDIA_EXPORT Picture {
  57  public:
  58   Picture(int32 picture_buffer_id,
  59           int32 bitstream_buffer_id,
  60           const gfx::Rect& visible_rect);
  61
  62   // Returns the id of the picture buffer where this picture is contained.
  63   int32 picture_buffer_id() const {
  64     return picture_buffer_id_;
  65   }
  66
  67   // Returns the id of the bitstream buffer from which this frame was decoded.
  68   int32 bitstream_buffer_id() const {
  69     return bitstream_buffer_id_;
  70   }
  71
  72   void set_bitstream_buffer_id(int32 bitstream_buffer_id) {
  73     bitstream_buffer_id_ = bitstream_buffer_id;
  74   }
  75
  76   // Returns the visible rectangle of the picture. Its size may be smaller
  77   // than the size of the PictureBuffer, as it is the only visible part of the
  78   // Picture contained in the PictureBuffer.
  79   gfx::Rect visible_rect() const { return visible_rect_; }
  80
  81  private:
  82   int32 picture_buffer_id_;
  83   int32 bitstream_buffer_id_;
  84   gfx::Rect visible_rect_;
  85 };
  86
  87 }  // namespace media
  88
  89 #endif  // MEDIA_VIDEO_PICTURE_H_