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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
// Copyright (c) 2012 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.
#include "content/renderer/media/renderer_gpu_video_decoder_factories.h"
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include "base/bind.h"
#include "base/synchronization/waitable_event.h"
#include "content/common/child_thread.h"
#include "content/common/gpu/client/gpu_channel_host.h"
#include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
#include "gpu/command_buffer/client/gles2_implementation.h"
#include "gpu/ipc/command_buffer_proxy.h"
namespace content {
RendererGpuVideoDecoderFactories::~RendererGpuVideoDecoderFactories() {}
RendererGpuVideoDecoderFactories::RendererGpuVideoDecoderFactories(
GpuChannelHost* gpu_channel_host,
const scoped_refptr<base::MessageLoopProxy>& message_loop,
WebGraphicsContext3DCommandBufferImpl* context)
: message_loop_(message_loop),
gpu_channel_host_(gpu_channel_host) {
if (message_loop_->BelongsToCurrentThread()) {
AsyncGetContext(context, NULL);
return;
}
// Threaded compositor requires us to wait for the context to be acquired.
base::WaitableEvent waiter(false, false);
message_loop_->PostTask(FROM_HERE, base::Bind(
&RendererGpuVideoDecoderFactories::AsyncGetContext,
// Unretained to avoid ref/deref'ing |*this|, which is not yet stored in a
// scoped_refptr. Safe because the Wait() below keeps us alive until this
// task completes.
base::Unretained(this),
// OK to pass raw because the pointee is only deleted on the compositor
// thread, and only as the result of a PostTask from the render thread
// which can only happen after this function returns, so our PostTask will
// run first.
context,
&waiter));
waiter.Wait();
}
void RendererGpuVideoDecoderFactories::AsyncGetContext(
WebGraphicsContext3DCommandBufferImpl* context,
base::WaitableEvent* waiter) {
context_ = context->AsWeakPtr();
if (context_) {
if (context_->makeContextCurrent()) {
// Called once per media player, but is a no-op after the first one in
// each renderer.
context_->insertEventMarkerEXT("GpuVDAContext3D");
}
}
if (waiter)
waiter->Signal();
}
media::VideoDecodeAccelerator*
RendererGpuVideoDecoderFactories::CreateVideoDecodeAccelerator(
media::VideoCodecProfile profile,
media::VideoDecodeAccelerator::Client* client) {
DCHECK(!message_loop_->BelongsToCurrentThread());
media::VideoDecodeAccelerator* vda = NULL;
base::WaitableEvent waiter(false, false);
message_loop_->PostTask(FROM_HERE, base::Bind(
&RendererGpuVideoDecoderFactories::AsyncCreateVideoDecodeAccelerator,
this, profile, client, &vda, &waiter));
waiter.Wait();
return vda;
}
void RendererGpuVideoDecoderFactories::AsyncCreateVideoDecodeAccelerator(
media::VideoCodecProfile profile,
media::VideoDecodeAccelerator::Client* client,
media::VideoDecodeAccelerator** vda,
base::WaitableEvent* waiter) {
DCHECK(message_loop_->BelongsToCurrentThread());
if (context_ && context_->GetCommandBufferProxy()) {
*vda = gpu_channel_host_->CreateVideoDecoder(
context_->GetCommandBufferProxy()->GetRouteID(),
profile, client);
} else {
*vda = NULL;
}
waiter->Signal();
}
bool RendererGpuVideoDecoderFactories::CreateTextures(
int32 count, const gfx::Size& size,
std::vector<uint32>* texture_ids,
uint32 texture_target) {
DCHECK(!message_loop_->BelongsToCurrentThread());
bool success = false;
base::WaitableEvent waiter(false, false);
message_loop_->PostTask(FROM_HERE, base::Bind(
&RendererGpuVideoDecoderFactories::AsyncCreateTextures, this,
count, size, texture_ids, texture_target, &success, &waiter));
waiter.Wait();
return success;
}
void RendererGpuVideoDecoderFactories::AsyncCreateTextures(
int32 count, const gfx::Size& size, std::vector<uint32>* texture_ids,
uint32 texture_target, bool* success, base::WaitableEvent* waiter) {
DCHECK(message_loop_->BelongsToCurrentThread());
DCHECK(texture_target);
if (!context_) {
*success = false;
waiter->Signal();
return;
}
gpu::gles2::GLES2Implementation* gles2 = context_->GetImplementation();
texture_ids->resize(count);
gles2->GenTextures(count, &texture_ids->at(0));
for (int i = 0; i < count; ++i) {
gles2->ActiveTexture(GL_TEXTURE0);
uint32 texture_id = texture_ids->at(i);
gles2->BindTexture(texture_target, texture_id);
gles2->TexParameteri(texture_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
gles2->TexParameteri(texture_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gles2->TexParameteri(texture_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
gles2->TexParameteri(texture_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
if (texture_target == GL_TEXTURE_2D) {
gles2->TexImage2D(texture_target, 0, GL_RGBA, size.width(), size.height(),
0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
}
}
// We need a glFlush here to guarantee the decoder (in the GPU process) can
// use the texture ids we return here. Since textures are expected to be
// reused, this should not be unacceptably expensive.
gles2->Flush();
DCHECK_EQ(gles2->GetError(), static_cast<GLenum>(GL_NO_ERROR));
*success = true;
waiter->Signal();
}
void RendererGpuVideoDecoderFactories::DeleteTexture(uint32 texture_id) {
DCHECK(!message_loop_->BelongsToCurrentThread());
message_loop_->PostTask(FROM_HERE, base::Bind(
&RendererGpuVideoDecoderFactories::AsyncDeleteTexture, this, texture_id));
}
void RendererGpuVideoDecoderFactories::AsyncDeleteTexture(uint32 texture_id) {
DCHECK(message_loop_->BelongsToCurrentThread());
if (!context_)
return;
gpu::gles2::GLES2Implementation* gles2 = context_->GetImplementation();
gles2->DeleteTextures(1, &texture_id);
DCHECK_EQ(gles2->GetError(), static_cast<GLenum>(GL_NO_ERROR));
}
void RendererGpuVideoDecoderFactories::ReadPixels(
uint32 texture_id, uint32 texture_target, const gfx::Size& size,
void* pixels) {
base::WaitableEvent waiter(false, false);
if (!message_loop_->BelongsToCurrentThread()) {
message_loop_->PostTask(FROM_HERE, base::Bind(
&RendererGpuVideoDecoderFactories::AsyncReadPixels, this,
texture_id, texture_target, size, pixels, &waiter));
waiter.Wait();
} else {
AsyncReadPixels(texture_id, texture_target, size, pixels, &waiter);
}
}
void RendererGpuVideoDecoderFactories::AsyncReadPixels(
uint32 texture_id, uint32 texture_target, const gfx::Size& size,
void* pixels, base::WaitableEvent* waiter) {
DCHECK(message_loop_->BelongsToCurrentThread());
if (!context_)
return;
gpu::gles2::GLES2Implementation* gles2 = context_->GetImplementation();
GLuint tmp_texture;
gles2->GenTextures(1, &tmp_texture);
gles2->BindTexture(texture_target, tmp_texture);
gles2->TexParameteri(texture_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
gles2->TexParameteri(texture_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gles2->TexParameteri(texture_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
gles2->TexParameteri(texture_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
context_->copyTextureCHROMIUM(
texture_target, texture_id, tmp_texture, 0, GL_RGBA);
GLuint fb;
gles2->GenFramebuffers(1, &fb);
gles2->BindFramebuffer(GL_FRAMEBUFFER, fb);
gles2->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
texture_target, tmp_texture, 0);
gles2->PixelStorei(GL_PACK_ALIGNMENT, 4);
gles2->ReadPixels(0, 0, size.width(), size.height(), GL_BGRA_EXT,
GL_UNSIGNED_BYTE, pixels);
gles2->DeleteFramebuffers(1, &fb);
gles2->DeleteTextures(1, &tmp_texture);
DCHECK_EQ(gles2->GetError(), static_cast<GLenum>(GL_NO_ERROR));
waiter->Signal();
}
base::SharedMemory* RendererGpuVideoDecoderFactories::CreateSharedMemory(
size_t size) {
DCHECK_NE(MessageLoop::current(), ChildThread::current()->message_loop());
base::SharedMemory* shm = NULL;
base::WaitableEvent waiter(false, false);
ChildThread::current()->message_loop()->PostTask(FROM_HERE, base::Bind(
&RendererGpuVideoDecoderFactories::AsyncCreateSharedMemory, this,
size, &shm, &waiter));
waiter.Wait();
return shm;
}
void RendererGpuVideoDecoderFactories::AsyncCreateSharedMemory(
size_t size, base::SharedMemory** shm, base::WaitableEvent* waiter) {
DCHECK_EQ(MessageLoop::current(), ChildThread::current()->message_loop());
*shm = ChildThread::current()->AllocateSharedMemory(size);
waiter->Signal();
}
} // namespace content
|
