| // Copyright 2018 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. |
| |
| #include "device_ctx.h" |
| |
| #include <fuchsia/hardware/mediacodec/c/fidl.h> |
| #include <lib/sync/completion.h> |
| |
| #include "amlogic-video.h" |
| #include "macros.h" |
| |
| namespace { |
| |
| const fuchsia_hardware_mediacodec_Device_ops_t kFidlOps = { |
| .GetCodecFactory = |
| [](void* ctx, zx_handle_t handle) { |
| zx::channel request(handle); |
| reinterpret_cast<DeviceCtx*>(ctx)->GetCodecFactory(std::move(request)); |
| return ZX_OK; |
| }, |
| }; |
| |
| static zx_status_t amlogic_video_message(void* ctx, fidl_msg_t* msg, fidl_txn_t* txn) { |
| return fuchsia_hardware_mediacodec_Device_dispatch(ctx, txn, msg, &kFidlOps); |
| } |
| |
| static void amlogic_release(void* ctx) { delete static_cast<DeviceCtx*>(ctx); } |
| |
| static zx_protocol_device_t amlogic_video_device_ops = { |
| DEVICE_OPS_VERSION, .release = amlogic_release, .message = amlogic_video_message, |
| // TODO(jbauman) or TODO(dustingreen): .suspend .resume |
| }; |
| |
| } // namespace |
| |
| DeviceCtx::DeviceCtx(DriverCtx* driver) |
| : driver_(driver), codec_admission_control_(driver->shared_fidl_loop()->dispatcher()) { |
| video_ = std::make_unique<AmlogicVideo>(); |
| device_fidl_ = std::make_unique<DeviceFidl>(this); |
| } |
| |
| DeviceCtx::~DeviceCtx() { |
| // There are two ways to destroy a fidl::Binding safely: |
| // * Switch to FIDL thread before Unbind() or ~Binding. |
| // * async::Loop Quit() + JoinThreads() before Unbind() or ~Binding |
| // |
| // For now this code (if implementation needed) will choose the first option |
| // by destructing DeviceFidl on the FIDL thread. The current way forces this |
| // thread to wait in this destructor until the shared_fidl_thread() is done |
| // processing ~DeviceFidl, which means we require that ~DeviceCtx is not |
| // itself running on the shared_fidl_thread() (or we could check which thread |
| // here, if we really need to). |
| // |
| // This code is only run when we switch between test and production drivers. |
| sync_completion_t completion; |
| driver_->PostToSharedFidl([this, &completion]() { |
| device_fidl_.reset(); |
| sync_completion_signal(&completion); |
| }); |
| sync_completion_wait(&completion, ZX_TIME_INFINITE); |
| } |
| |
| zx_status_t DeviceCtx::Bind(zx_device_t* parent) { |
| device_add_args_t vc_video_args = {}; |
| vc_video_args.version = DEVICE_ADD_ARGS_VERSION; |
| vc_video_args.name = "amlogic_video"; |
| vc_video_args.ctx = this; |
| vc_video_args.ops = &amlogic_video_device_ops; |
| |
| // ZX_PROTOCOL_MEDIA_CODEC causes /dev/class/media-codec to get created, and |
| // flags support for MEDIA_CODEC_IOCTL_GET_CODEC_FACTORY_CHANNEL. The |
| // proto_ops_ is empty but has a non-null address, so we don't break the |
| // invariant that devices with a protocol have non-null proto_ops. |
| vc_video_args.proto_id = ZX_PROTOCOL_MEDIA_CODEC; |
| vc_video_args.proto_ops = &proto_ops_; |
| |
| zx_status_t status = device_add(parent, &vc_video_args, &device_); |
| if (status != ZX_OK) { |
| DECODE_ERROR("Failed to bind device"); |
| return ZX_ERR_NO_MEMORY; |
| } |
| return ZX_OK; |
| } |
| |
| void DeviceCtx::GetCodecFactory(zx::channel request) { |
| device_fidl()->ConnectChannelBoundCodecFactory(std::move(request)); |
| } |