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
|
/*
* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/video_coding/decoder_database.h"
#include <cstdint>
#include <memory>
#include <optional>
#include <utility>
#include "api/sequence_checker.h"
#include "api/video/encoded_frame.h"
#include "api/video/render_resolution.h"
#include "api/video_codecs/video_decoder.h"
#include "modules/video_coding/generic_decoder.h"
#include "modules/video_coding/include/video_coding_defines.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
namespace webrtc {
VCMDecoderDatabase::VCMDecoderDatabase() {
decoder_sequence_checker_.Detach();
}
void VCMDecoderDatabase::DeregisterExternalDecoder(uint8_t payload_type) {
RTC_DCHECK_RUN_ON(&decoder_sequence_checker_);
auto it = decoders_.find(payload_type);
if (it == decoders_.end()) {
return;
}
// We can't use payload_type to check if the decoder is currently in use,
// because payload type may be out of date (e.g. before we decode the first
// frame after RegisterReceiveCodec).
if (current_decoder_ && current_decoder_->IsSameDecoder(it->second.get())) {
// Release it if it was registered and in use.
current_decoder_ = std::nullopt;
}
decoders_.erase(it);
}
// Add the external decoder object to the list of external decoders.
// Won't be registered as a receive codec until RegisterReceiveCodec is called.
void VCMDecoderDatabase::RegisterExternalDecoder(
uint8_t payload_type,
std::unique_ptr<VideoDecoder> external_decoder) {
RTC_DCHECK_RUN_ON(&decoder_sequence_checker_);
// If payload value already exists, erase old and insert new.
DeregisterExternalDecoder(payload_type);
if (external_decoder) {
decoders_.emplace(
std::make_pair(payload_type, std::move(external_decoder)));
}
}
bool VCMDecoderDatabase::IsExternalDecoderRegistered(
uint8_t payload_type) const {
RTC_DCHECK_RUN_ON(&decoder_sequence_checker_);
return decoders_.find(payload_type) != decoders_.end();
}
void VCMDecoderDatabase::RegisterReceiveCodec(
uint8_t payload_type,
const VideoDecoder::Settings& settings) {
// If payload value already exists, erase old and insert new.
if (payload_type == current_payload_type_) {
current_payload_type_ = std::nullopt;
}
decoder_settings_[payload_type] = settings;
}
bool VCMDecoderDatabase::DeregisterReceiveCodec(uint8_t payload_type) {
if (decoder_settings_.erase(payload_type) == 0) {
return false;
}
if (payload_type == current_payload_type_) {
// This codec is currently in use.
current_payload_type_ = std::nullopt;
}
return true;
}
void VCMDecoderDatabase::DeregisterReceiveCodecs() {
current_payload_type_ = std::nullopt;
decoder_settings_.clear();
}
VCMGenericDecoder* VCMDecoderDatabase::GetDecoder(
const EncodedFrame& frame,
VCMDecodedFrameCallback* decoded_frame_callback) {
RTC_DCHECK_RUN_ON(&decoder_sequence_checker_);
RTC_DCHECK(decoded_frame_callback->UserReceiveCallback());
uint8_t payload_type = frame.PayloadType();
if (payload_type == current_payload_type_ || payload_type == 0) {
return current_decoder_.has_value() ? &*current_decoder_ : nullptr;
}
// If decoder exists - delete.
if (current_decoder_.has_value()) {
current_decoder_ = std::nullopt;
current_payload_type_ = std::nullopt;
}
CreateAndInitDecoder(frame);
if (current_decoder_ == std::nullopt) {
return nullptr;
}
VCMReceiveCallback* callback = decoded_frame_callback->UserReceiveCallback();
callback->OnIncomingPayloadType(payload_type);
if (current_decoder_->RegisterDecodeCompleteCallback(decoded_frame_callback) <
0) {
current_decoder_ = std::nullopt;
return nullptr;
}
current_payload_type_ = payload_type;
return &*current_decoder_;
}
void VCMDecoderDatabase::CreateAndInitDecoder(const EncodedFrame& frame) {
uint8_t payload_type = frame.PayloadType();
RTC_DLOG(LS_INFO) << "Initializing decoder with payload type '"
<< int{payload_type} << "'.";
auto decoder_item = decoder_settings_.find(payload_type);
if (decoder_item == decoder_settings_.end()) {
RTC_LOG(LS_ERROR) << "Can't find a decoder associated with payload type: "
<< int{payload_type};
return;
}
auto external_dec_item = decoders_.find(payload_type);
if (external_dec_item == decoders_.end()) {
RTC_LOG(LS_ERROR) << "No decoder of this type exists.";
return;
}
current_decoder_.emplace(external_dec_item->second.get());
// Copy over input resolutions to prevent codec reinitialization due to
// the first frame being of a different resolution than the database values.
// This is best effort, since there's no guarantee that width/height have been
// parsed yet (and may be zero).
RenderResolution frame_resolution(frame.EncodedImage()._encodedWidth,
frame.EncodedImage()._encodedHeight);
if (frame_resolution.Valid()) {
decoder_item->second.set_max_render_resolution(frame_resolution);
}
if (!current_decoder_->Configure(decoder_item->second)) {
current_decoder_ = std::nullopt;
RTC_LOG(LS_ERROR) << "Failed to initialize decoder.";
}
}
} // namespace webrtc
|
