GpuArcVideoService

components/arc/common/video_accelerator.mojom

+// Copyright 2016 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.
+
+module arc;
+
+[Client=VideoAcceleratorServiceClient]
+
+enum HalPixelFormatExtension {

[Luis Héctor Chávez, 2016/03/24 17:24:20]

Do you think all these enums will need modification in the future? If that is
the case, please add a [Extensible] tag on each one.

[kcwu, 2016/03/28 13:17:35]

Done.

+  HAL_PIXEL_FORMAT_H264 = 0x34363248,
+  HAL_PIXEL_FORMAT_VP8 = 0x00385056,
+};
+
+enum PortType {
+  PORT_INPUT = 0,
+  PORT_OUTPUT = 1,
+};
+
+enum BufferFlag {
+  BUFFER_FLAG_EOS = 1,
+};
+
+struct BufferMetadata {
+  int64 timestamp;  // in microseconds
+  uint32 flags;
+  uint32 bytes_used;
+};
+
+struct VideoFormat {
+  uint32 pixel_format;
+  uint32 buffer_size;
+
+  // minimal number of buffers required to process the video.
+  uint32 min_num_buffers;
+  uint32 coded_width;
+  uint32 coded_height;
+  uint32 crop_left;
+  uint32 crop_width;
+  uint32 crop_top;
+  uint32 crop_height;
+};
+
+struct ArcVideoAcceleratorConfig {
+  enum DeviceType {
+    DEVICE_ENCODER = 0,
+    DEVICE_DECODER = 1,
+  };
+
+  DeviceType device_type;
+  uint64 num_input_buffers;
+  uint32 input_pixel_format;
+};
+
+interface VideoAcceleratorService {
+  Initialize(ArcVideoAcceleratorConfig config) => (bool result);

[Luis Héctor Chávez, 2016/03/24 17:24:20]

Can you add explicit ordinals?

[kcwu, 2016/03/28 13:17:35]

Done.

+
+  BindSharedMemory(PortType port, uint32 index, handle ashmem_fd,
+                   uint64 offset, uint64 length);
+
+  BindDmabuf(PortType port, uint32 index, handle dmabuf_fd);
+
+  UseBuffer(PortType port, uint32 index, BufferMetadata metadata);
+
+  SetNumberOfOutputBuffers(uint64 number);
+
+  Reset();
+};
+
+interface VideoAcceleratorServiceClient {
+  enum Error {
+    NO_ERROR = 0,
+    ILLEGAL_STATE = 1,
+    INVALID_ARGUMENT = 2,
+    UNREADABLE_INPUT = 3,
+    PLATFORM_FAILURE = 4,
+  };
+
+  Init(VideoAcceleratorService service_ptr);
+
+  OnError(Error error);
+
+  OnBufferDone(PortType port, uint32 index, BufferMetadata metadata);
+
+  OnResetDone();
+
+  OnOutputFormatChanged(VideoFormat format);
+};