| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| library fuchsia.hardware.gdc; |
| using zx; |
| using fuchsia.hardware.camerahwaccel; |
| using fuchsia.sysmem; |
| |
| struct GdcConfigInfo { |
| zx.handle:VMO config_vmo; |
| uint32 size; |
| }; |
| |
| [BanjoLayout = "ddk-protocol"] |
| protocol Gdc { |
| // Registers the buffer collections and configuration which the GDC will be using |
| // for this task and also the callback functions for a particular task and |
| // returns a task index. |
| // |input_buffer_collection| : Pool of VMOs as input to the GDC. |
| // |output_buffer_collection| : Pool of VMOs as output to the GDC. |
| // |config_vmos| : Static configuration for GDC is stored in this vmo for this task. |
| // |callback| : This function is called when GDC is done processing the task. |
| // @Returns: |task_index| : Task ID for this task. |
| InitTask(fuchsia.sysmem.BufferCollectionInfo_2 input_buffer_collection, |
| fuchsia.sysmem.BufferCollectionInfo_2 output_buffer_collection, |
| fuchsia.sysmem.ImageFormat_2 input_image_format, |
| vector<fuchsia.sysmem.ImageFormat_2> output_image_format_table, |
| uint32 output_image_format_index, |
| vector<GdcConfigInfo> config_vmos, |
| fuchsia.hardware.camerahwaccel.HwAccelFrameCallback frame_callback, |
| fuchsia.hardware.camerahwaccel.HwAccelResChangeCallback res_callback, |
| fuchsia.hardware.camerahwaccel.HwAccelRemoveTaskCallback task_remove_callback) |
| -> (zx.status s, uint32 task_index); |
| |
| // De-registers the task. |
| // NOTE: Ensure that after calling RemoveTask() on a particular |task_index|, |
| // no other tasks pertaining to this |task_index| are queued up. |
| RemoveTask(uint32 task_index); |
| |
| // Processes the frame at |input_buffer_index| within |input_buffer_collection| |
| // in the task corresponding to |task_index| and stores the ouput in the |
| // |output_buffer_collection| after applying the correct configuration. |
| // After processing we call the callback registered for this task with the |
| // output buffer index. |capture_timestamp| is forwarded to derived frames. |
| ProcessFrame(uint32 task_index, uint32 input_buffer_index, uint64 capture_timestamp) -> (zx.status s); |
| |
| // Releases the frame |buffer_index| from the |output_buffer_collection| to be |
| // used again by GDC driver again later. |
| ReleaseFrame(uint32 task_index, uint32 buffer_index); |
| |
| // Set the output resolution.This operation is queued to the worker thread to be |
| // performed in sequence. Once the output resolution for this Task has changed, |
| // callback using the HwAccelCallback, returning the new index of the Image Format. |
| SetOutputResolution(uint32 task_index, uint32 new_output_image_format_index) -> (zx.status s); |
| }; |