1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/renderer/stream_texture_host_android.h"
#include "base/unguessable_token.h"
#include "content/renderer/render_thread_impl.h"
#include "gpu/ipc/client/gpu_channel_host.h"
#include "gpu/ipc/common/command_buffer_id.h"
#include "gpu/ipc/common/gpu_channel.mojom.h"
#include "gpu/ipc/common/vulkan_ycbcr_info.h"
#include "ipc/ipc_message_macros.h"
#include "ipc/ipc_mojo_bootstrap.h"
namespace content {
StreamTextureHost::StreamTextureHost(
scoped_refptr<gpu::GpuChannelHost> channel,
int32_t route_id,
mojo::PendingAssociatedRemote<gpu::mojom::StreamTexture> texture)
: route_id_(route_id),
listener_(nullptr),
channel_(std::move(channel)),
pending_texture_(std::move(texture)) {
DCHECK(channel_);
DCHECK(route_id_);
}
StreamTextureHost::~StreamTextureHost() {
if (channel_) {
// We destroy the StreamTexture as a deferred message followed by a flush
// to ensure this is ordered correctly with regards to previous deferred
// messages, such as CreateSharedImage.
uint32_t flush_id = channel_->EnqueueDeferredMessage(
gpu::mojom::DeferredRequestParams::NewDestroyStreamTexture(route_id_));
channel_->EnsureFlush(flush_id);
}
}
bool StreamTextureHost::BindToCurrentThread(Listener* listener) {
listener_ = listener;
if (!pending_texture_)
return false;
// Disable artificial limitations of Channel-associated interface bindings.
// Normally such interfaces can only be bound on the main or IO threads to
// prevent various classes of bugs that can arise from a Channel-associated
// endpoint being bound too late to receive messages already sent to it.
//
// Without this scoped allowance, binding from the compositor thread will
// actually still bind to the main thread, leading to potential memory bugs
// and other racy behavior since `this` is still destroyed on the compositor
// thread.
//
// The allowance is safe because binding these endpoints to the compositor
// thread cannot cause such late-binding bugs: remotes can only receive
// replies, but `texture_remote_` can't have made any calls yet; and
// `receiver_` doesn't even have a corresponding remote to call into it until
// the StartListening() line below.
//
// SUBTLE: If any message on StreamTextureClient (or any reply on
// StreamTexture) were to be added which accepts another associated interface
// endpoint, *that* could render this all unsafe since the new endpoint might
// get bound too late.
IPC::ScopedAllowOffSequenceChannelAssociatedBindings allow_off_thread_binding;
texture_remote_.Bind(std::move(pending_texture_));
texture_remote_->StartListening(receiver_.BindNewEndpointAndPassRemote());
texture_remote_.set_disconnect_handler(
base::BindOnce(&StreamTextureHost::OnDisconnectedFromGpuProcess,
base::Unretained(this)));
return true;
}
void StreamTextureHost::OnDisconnectedFromGpuProcess() {
channel_ = nullptr;
texture_remote_.reset();
receiver_.reset();
}
void StreamTextureHost::OnFrameWithInfoAvailable(
const gpu::Mailbox& mailbox,
const gfx::Size& coded_size,
const gfx::Rect& visible_rect,
absl::optional<gpu::VulkanYCbCrInfo> ycbcr_info) {
if (listener_) {
listener_->OnFrameWithInfoAvailable(mailbox, coded_size, visible_rect,
ycbcr_info);
}
}
void StreamTextureHost::OnFrameAvailable() {
if (listener_)
listener_->OnFrameAvailable();
}
void StreamTextureHost::ForwardStreamTextureForSurfaceRequest(
const base::UnguessableToken& request_token) {
if (texture_remote_)
texture_remote_->ForwardForSurfaceRequest(request_token);
}
void StreamTextureHost::UpdateRotatedVisibleSize(const gfx::Size& size) {
if (texture_remote_)
texture_remote_->UpdateRotatedVisibleSize(size);
}
gpu::SyncToken StreamTextureHost::GenUnverifiedSyncToken() {
// |channel_| can be set to null via OnDisconnectedFromGpuProcess() which
// means StreamTextureHost could still be alive when |channel_| is gone.
if (!channel_)
return gpu::SyncToken();
return gpu::SyncToken(gpu::CommandBufferNamespace::GPU_IO,
gpu::CommandBufferIdFromChannelAndRoute(
channel_->channel_id(), route_id_),
release_id_);
}
} // namespace content
|
