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
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "AppleDecoderModule.h"
#include <dlfcn.h>
#include "AppleATDecoder.h"
#include "AppleVTDecoder.h"
#include "MP4Decoder.h"
#include "VideoUtils.h"
#include "VPXDecoder.h"
#include "mozilla/Logging.h"
#include "mozilla/StaticPrefs_media.h"
#include "mozilla/gfx/gfxVars.h"
extern "C" {
// Only exists from MacOS 11
extern void VTRegisterSupplementalVideoDecoderIfAvailable(
CMVideoCodecType codecType) __attribute__((weak_import));
extern Boolean VTIsHardwareDecodeSupported(CMVideoCodecType codecType)
__attribute__((weak_import));
}
namespace mozilla {
using media::DecodeSupport;
using media::DecodeSupportSet;
using media::MCSInfo;
using media::MediaCodec;
bool AppleDecoderModule::sInitialized = false;
bool AppleDecoderModule::sCanUseVP9Decoder = false;
/* static */
void AppleDecoderModule::Init() {
if (sInitialized) {
return;
}
sInitialized = true;
if (RegisterSupplementalVP9Decoder()) {
sCanUseVP9Decoder = CanCreateHWDecoder(MediaCodec::VP9);
}
}
nsresult AppleDecoderModule::Startup() {
if (!sInitialized) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
already_AddRefed<MediaDataDecoder> AppleDecoderModule::CreateVideoDecoder(
const CreateDecoderParams& aParams) {
if (Supports(SupportDecoderParams(aParams), nullptr /* diagnostics */)
.isEmpty()) {
return nullptr;
}
RefPtr<MediaDataDecoder> decoder;
if (IsVideoSupported(aParams.VideoConfig(), aParams.mOptions)) {
decoder = new AppleVTDecoder(aParams.VideoConfig(), aParams.mImageContainer,
aParams.mOptions, aParams.mKnowsCompositor,
aParams.mTrackingId);
}
return decoder.forget();
}
already_AddRefed<MediaDataDecoder> AppleDecoderModule::CreateAudioDecoder(
const CreateDecoderParams& aParams) {
if (Supports(SupportDecoderParams(aParams), nullptr /* diagnostics */)
.isEmpty()) {
return nullptr;
}
RefPtr<MediaDataDecoder> decoder = new AppleATDecoder(aParams.AudioConfig());
return decoder.forget();
}
DecodeSupportSet AppleDecoderModule::SupportsMimeType(
const nsACString& aMimeType, DecoderDoctorDiagnostics* aDiagnostics) const {
bool checkSupport = aMimeType.EqualsLiteral("audio/mp4a-latm") ||
MP4Decoder::IsH264(aMimeType) ||
VPXDecoder::IsVP9(aMimeType);
DecodeSupportSet supportType{};
if (checkSupport) {
UniquePtr<TrackInfo> trackInfo = CreateTrackInfoWithMIMEType(aMimeType);
if (trackInfo && trackInfo->IsAudio()) {
supportType = DecodeSupport::SoftwareDecode;
} else if (trackInfo && trackInfo->IsVideo()) {
supportType = Supports(SupportDecoderParams(*trackInfo), aDiagnostics);
}
}
MOZ_LOG(sPDMLog, LogLevel::Debug,
("Apple decoder %s requested type '%s'",
supportType.isEmpty() ? "rejects" : "supports",
aMimeType.BeginReading()));
return supportType;
}
DecodeSupportSet AppleDecoderModule::Supports(
const SupportDecoderParams& aParams,
DecoderDoctorDiagnostics* aDiagnostics) const {
const auto& trackInfo = aParams.mConfig;
if (trackInfo.IsAudio()) {
return SupportsMimeType(trackInfo.mMimeType, aDiagnostics);
}
const bool checkSupport = trackInfo.GetAsVideoInfo() &&
IsVideoSupported(*trackInfo.GetAsVideoInfo());
DecodeSupportSet dss{};
if (!checkSupport) {
return dss;
}
const MediaCodec codec =
MCSInfo::GetMediaCodecFromMimeType(trackInfo.mMimeType);
if (CanCreateHWDecoder(codec)) {
dss += DecodeSupport::HardwareDecode;
}
switch (codec) {
case MediaCodec::VP8:
[[fallthrough]];
case MediaCodec::VP9:
if (StaticPrefs::media_rdd_vpx_enabled() &&
StaticPrefs::media_utility_ffvpx_enabled()) {
dss += DecodeSupport::SoftwareDecode;
}
break;
default:
dss += DecodeSupport::SoftwareDecode;
break;
}
return dss;
}
bool AppleDecoderModule::IsVideoSupported(
const VideoInfo& aConfig,
const CreateDecoderParams::OptionSet& aOptions) const {
if (MP4Decoder::IsH264(aConfig.mMimeType)) {
return true;
}
if (!VPXDecoder::IsVP9(aConfig.mMimeType) || !sCanUseVP9Decoder ||
aOptions.contains(
CreateDecoderParams::Option::HardwareDecoderNotAllowed)) {
return false;
}
if (VPXDecoder::IsVP9(aConfig.mMimeType) &&
aOptions.contains(CreateDecoderParams::Option::LowLatency)) {
// SVC layers are unsupported, and may be used in low latency use cases
// (WebRTC).
return false;
}
if (aConfig.HasAlpha()) {
return false;
}
// HW VP9 decoder only supports 8 or 10 bit color.
if (aConfig.mColorDepth != gfx::ColorDepth::COLOR_8 &&
aConfig.mColorDepth != gfx::ColorDepth::COLOR_10) {
return false;
}
// See if we have a vpcC box, and check further constraints.
// HW VP9 Decoder supports Profile 0 & 2 (YUV420)
if (aConfig.mExtraData && aConfig.mExtraData->Length() < 5) {
return true; // Assume it's okay.
}
int profile = aConfig.mExtraData->ElementAt(4);
return profile == 0 || profile == 2;
}
/* static */
bool AppleDecoderModule::CanCreateHWDecoder(MediaCodec aCodec) {
// Check whether HW decode should even be enabled
if (!gfx::gfxVars::CanUseHardwareVideoDecoding()) {
return false;
}
VideoInfo info(1920, 1080);
bool vtReportsSupport = false;
if (!VTIsHardwareDecodeSupported) {
return false;
}
switch (aCodec) {
case MediaCodec::VP9:
info.mMimeType = "video/vp9";
VPXDecoder::GetVPCCBox(info.mExtraData, VPXDecoder::VPXStreamInfo());
vtReportsSupport = VTIsHardwareDecodeSupported(kCMVideoCodecType_VP9);
break;
case MediaCodec::H264:
// 1806391 - H264 hardware decode check crashes on 10.12 - 10.14
if (__builtin_available(macos 10.15, *)) {
info.mMimeType = "video/avc";
vtReportsSupport = VTIsHardwareDecodeSupported(kCMVideoCodecType_H264);
}
break;
default:
vtReportsSupport = false;
break;
}
// VT reports HW decode is supported -- verify by creating an actual decoder
if (vtReportsSupport) {
RefPtr<AppleVTDecoder> decoder =
new AppleVTDecoder(info, nullptr, {}, nullptr, Nothing());
MediaResult rv = decoder->InitializeSession();
if (!NS_SUCCEEDED(rv)) {
MOZ_LOG(
sPDMLog, LogLevel::Debug,
("Apple HW decode failure while initializing VT decoder session"));
return false;
}
nsAutoCString failureReason;
// IsHardwareAccelerated appears to return invalid results for H.264 so
// we assume that the earlier VTIsHardwareDecodeSupported call is correct.
// See: https://bugzilla.mozilla.org/show_bug.cgi?id=1716196#c7
bool hwSupport = decoder->IsHardwareAccelerated(failureReason) ||
aCodec == MediaCodec::H264;
if (!hwSupport) {
MOZ_LOG(sPDMLog, LogLevel::Debug,
("Apple HW decode failure: '%s'", failureReason.BeginReading()));
}
decoder->Shutdown();
return hwSupport;
}
return false;
}
/* static */
bool AppleDecoderModule::RegisterSupplementalVP9Decoder() {
#ifdef XP_MACOSX
static bool sRegisterIfAvailable = []() {
if (__builtin_available(macos 11.0, *)) {
VTRegisterSupplementalVideoDecoderIfAvailable(kCMVideoCodecType_VP9);
return true;
}
return false;
}();
return sRegisterIfAvailable;
#else // iOS
return false;
#endif
}
/* static */
already_AddRefed<PlatformDecoderModule> AppleDecoderModule::Create() {
return MakeAndAddRef<AppleDecoderModule>();
}
} // namespace mozilla
|
