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
|
// Copyright (c) 2011 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 "remoting/base/decoder_vp8.h"
#include "media/base/media.h"
#include "media/base/yuv_convert.h"
#include "remoting/base/util.h"
extern "C" {
#define VPX_CODEC_DISABLE_COMPAT 1
#include "third_party/libvpx/source/libvpx/vpx/vpx_codec.h"
#include "third_party/libvpx/source/libvpx/vpx/vpx_decoder.h"
#include "third_party/libvpx/source/libvpx/vpx/vp8dx.h"
}
namespace remoting {
DecoderVp8::DecoderVp8()
: reverse_rows_(true),
state_(kUninitialized),
codec_(NULL) {
}
DecoderVp8::~DecoderVp8() {
if (codec_) {
vpx_codec_err_t ret = vpx_codec_destroy(codec_);
CHECK(ret == VPX_CODEC_OK) << "Failed to destroy codec";
}
delete codec_;
}
void DecoderVp8::Initialize(scoped_refptr<media::VideoFrame> frame) {
DCHECK_EQ(kUninitialized, state_);
if (frame->format() != media::VideoFrame::RGB32) {
LOG(INFO) << "DecoderVp8 only supports RGB32 as output";
state_ = kError;
return;
}
frame_ = frame;
state_ = kReady;
}
Decoder::DecodeResult DecoderVp8::DecodePacket(const VideoPacket* packet) {
DCHECK_EQ(kReady, state_);
// Initialize the codec as needed.
if (!codec_) {
codec_ = new vpx_codec_ctx_t();
vpx_codec_err_t ret =
vpx_codec_dec_init(
codec_, vpx_codec_vp8_dx(), NULL, 0);
if (ret != VPX_CODEC_OK) {
LOG(INFO) << "Cannot initialize codec.";
delete codec_;
codec_ = NULL;
state_ = kError;
return DECODE_ERROR;
}
}
// Do the actual decoding.
vpx_codec_err_t ret = vpx_codec_decode(
codec_, reinterpret_cast<const uint8*>(packet->data().data()),
packet->data().size(), NULL, 0);
if (ret != VPX_CODEC_OK) {
LOG(INFO) << "Decoding failed:" << vpx_codec_err_to_string(ret) << "\n"
<< "Details: " << vpx_codec_error(codec_) << "\n"
<< vpx_codec_error_detail(codec_);
return DECODE_ERROR;
}
// Gets the decoded data.
vpx_codec_iter_t iter = NULL;
vpx_image_t* image = vpx_codec_get_frame(codec_, &iter);
if (!image) {
LOG(INFO) << "No video frame decoded";
return DECODE_ERROR;
}
// Perform YUV conversion.
uint8* data_start = frame_->data(media::VideoFrame::kRGBPlane);
int stride = frame_->stride(media::VideoFrame::kRGBPlane);
if (reverse_rows_) {
data_start = data_start + (frame_->height() - 1) * stride;
stride = -stride;
}
// Propogate updated rects.
updated_rects_.clear();
for (int i = 0; i < packet->dirty_rects_size(); ++i) {
gfx::Rect r = gfx::Rect(packet->dirty_rects(i).x(),
packet->dirty_rects(i).y(),
packet->dirty_rects(i).width(),
packet->dirty_rects(i).height());
// Perform color space conversion only on the updated rectangle.
ConvertYUVToRGB32WithRect(image->planes[0],
image->planes[1],
image->planes[2],
data_start,
r.x(),
r.y(),
r.width(),
r.height(),
image->stride[0],
image->stride[1],
stride);
// Since the image generated by client is upside-down we need to report
// updated rects as upside-down.
if (reverse_rows_)
r.set_y(image->d_h - r.bottom());
updated_rects_.push_back(r);
}
return DECODE_DONE;
}
void DecoderVp8::GetUpdatedRects(UpdatedRects* rects) {
rects->swap(updated_rects_);
}
void DecoderVp8::Reset() {
frame_ = NULL;
state_ = kUninitialized;
}
bool DecoderVp8::IsReadyForData() {
return state_ == kReady;
}
VideoPacketFormat::Encoding DecoderVp8::Encoding() {
return VideoPacketFormat::ENCODING_VP8;
}
} // namespace remoting
|
