AndroidVDA by using Android's MediaCodec API.

content/common/gpu/media/gles2_external_texture_copier.h

+// Copyright (c) 2013 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.
+
+#ifndef CONTENT_COMMON_GPU_MEDIA_GLES2_EXTERNAL_TEXTURE_COPIER_H_
+#define CONTENT_COMMON_GPU_MEDIA_GLES2_EXTERNAL_TEXTURE_COPIER_H_
+
+#include "base/basictypes.h"
+#include "gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h"
+#include "ui/gl/gl_bindings.h"
+
+namespace content {
+
+// A utility class which copies the given external texture
+// (GL_TEXTURE_EXTERNAL_OES) to the target texture (GL_TEXTURE_2D).
+class Gles2ExternalTextureCopier {
+ public:
+  Gles2ExternalTextureCopier(int32 width, int32 height);
+  virtual ~Gles2ExternalTextureCopier();
+
+  bool Copy(GLuint source_texture_id, GLuint destination_texture_id_);
+
+ private:
+  void SaveState();
+  void RestoreState();
+  void SaveStateForAttrib(GLuint attrib, int index);
+  void RestoreStateForAttrib(GLuint attrib, int index);
+
+  int32 width_;
+  int32 height_;
+
+  GLint previous_framebuffer_id_;
+  GLint previous_renderbuffer_id_;
+  GLint previous_texture_2d_id_;
+  GLint previous_program_;
+  GLint previous_viewport_[4];
+  GLint vertex_array_buffer_binding_;
+  GLint index_array_buffer_binding_;
+
+  struct {
+    GLint enabled;
+    GLint size;
+    GLint type;
+    GLint normalized;
+    GLint stride;
+    GLvoid* pointer;
+  } previous_vertex_attrib_[2];
+
+  CopyTextureCHROMIUMResourceManager copier_;
+
+  DISALLOW_COPY_AND_ASSIGN(Gles2ExternalTextureCopier);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_MEDIA_GLES2_EXTERNAL_TEXTURE_COPIER_H_