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
|
/*
* Copyright (C) 2024 Igalia S.L
* Copyright (C) 2024 Metrological Group B.V.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* aint with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "GStreamerQuirkBroadcomBase.h"
#include <string.h>
#if USE(GSTREAMER)
#include "GStreamerCommon.h"
namespace WebCore {
GST_DEBUG_CATEGORY_STATIC(webkit_broadcom_base_quirks_debug);
#define GST_CAT_DEFAULT webkit_broadcom_base_quirks_debug
GStreamerQuirkBroadcomBase::GStreamerQuirkBroadcomBase()
{
GST_DEBUG_CATEGORY_INIT(webkit_broadcom_base_quirks_debug, "webkitquirksbroadcombase", 0, "WebKit Broadcom Base Quirks");
}
ASCIILiteral GStreamerQuirkBroadcomBase::queryBufferingPercentage(MediaPlayerPrivateGStreamer* playerPrivate, const GRefPtr<GstQuery>& query) const
{
auto& state = ensureState(playerPrivate);
if (playerPrivate->shouldDownload() || !state.m_queue2
|| !gst_element_query(state.m_queue2.get(), query.get()))
return nullptr;
return "queue2"_s;
}
int GStreamerQuirkBroadcomBase::correctBufferingPercentage(MediaPlayerPrivateGStreamer* playerPrivate, int originalBufferingPercentage, GstBufferingMode mode) const
{
auto& state = ensureState(playerPrivate);
// The Nexus playpump buffers a lot of data. Let's add it as if it had been buffered by the GstQueue2
// (only when using in-memory buffering), so we get more realistic percentages.
if (mode != GST_BUFFERING_STREAM || !(state.m_vidfilter || state.m_audfilter))
return originalBufferingPercentage;
// The Nexus playpump buffers a lot of data. Let's add it as if it had been buffered by the GstQueue2
// (only when using in-memory buffering), so we get more realistic percentages.
int correctedBufferingPercentage1 = originalBufferingPercentage;
int correctedBufferingPercentage2 = originalBufferingPercentage;
unsigned maxSizeBytes = 0;
// We don't trust the buffering percentage when it's 0, better rely on current-level-bytes and compute a new buffer level accordingly.
g_object_get(state.m_queue2.get(), "max-size-bytes", &maxSizeBytes, nullptr);
if (!originalBufferingPercentage && state.m_queue2) {
unsigned currentLevelBytes = 0;
g_object_get(state.m_queue2.get(), "current-level-bytes", ¤tLevelBytes, nullptr);
correctedBufferingPercentage1 = currentLevelBytes > maxSizeBytes ? 100 : static_cast<int>(currentLevelBytes * 100 / maxSizeBytes);
}
unsigned playpumpBufferedBytes = 0;
// We believe that the playpump stats are common for audio and video, so only asking the vidfilter or the audfilter
// would be enough. Both of them expose the buffered_bytes property (yes, with an underscore!).
GstElement* filter = state.m_vidfilter ? state.m_vidfilter.get() : state.m_audfilter.get();
if (filter)
g_object_get(GST_OBJECT(filter), "buffered_bytes", &playpumpBufferedBytes, nullptr);
unsigned multiqueueBufferedBytes = 0;
if (state.m_multiqueue) {
GUniqueOutPtr<GstStructure> stats;
g_object_get(state.m_multiqueue.get(), "stats", &stats.outPtr(), nullptr);
for (const auto& queue : gstStructureGetArray<const GstStructure*>(stats.get(), "queues"_s))
multiqueueBufferedBytes += gstStructureGet<unsigned>(queue, "bytes"_s).value_or(0);
}
// Current-level-bytes seems to be inacurate, so we compute its value from the buffering percentage.
size_t currentLevelBytes = static_cast<size_t>(maxSizeBytes) * static_cast<size_t>(originalBufferingPercentage) / static_cast<size_t>(100)
+ static_cast<size_t>(playpumpBufferedBytes) + static_cast<size_t>(multiqueueBufferedBytes);
correctedBufferingPercentage2 = currentLevelBytes > maxSizeBytes ? 100 : static_cast<int>(currentLevelBytes * 100 / maxSizeBytes);
if (correctedBufferingPercentage2 >= 100)
state.m_streamBufferingLevelMovingAverage.reset(100);
int averagedBufferingPercentage = state.m_streamBufferingLevelMovingAverage.accumulate(correctedBufferingPercentage2);
const char* extraElements = state.m_multiqueue ? "playpump and multiqueue" : "playpump";
if (!originalBufferingPercentage) {
GST_DEBUG("[Buffering] Buffering: mode: GST_BUFFERING_STREAM, status: %d%% (corrected to %d%% with current-level-bytes, "
"to %d%% with %s content, and to %d%% with moving average).", originalBufferingPercentage, correctedBufferingPercentage1,
correctedBufferingPercentage2, extraElements, averagedBufferingPercentage);
} else {
GST_DEBUG("[Buffering] Buffering: mode: GST_BUFFERING_STREAM, status: %d%% (corrected to %d%% with %s content and "
"to %d%% with moving average).", originalBufferingPercentage, correctedBufferingPercentage2, extraElements,
averagedBufferingPercentage);
}
return averagedBufferingPercentage;
}
void GStreamerQuirkBroadcomBase::resetBufferingPercentage(MediaPlayerPrivateGStreamer* playerPrivate, int bufferingPercentage) const
{
auto& state = ensureState(playerPrivate);
state.m_streamBufferingLevelMovingAverage.reset(bufferingPercentage);
}
void GStreamerQuirkBroadcomBase::setupBufferingPercentageCorrection(MediaPlayerPrivateGStreamer* playerPrivate, GstState currentState, GstState newState, GRefPtr<GstElement>&& element) const
{
auto& state = ensureState(playerPrivate);
// This code must support being run from different GStreamerQuirkBroadcomBase subclasses without breaking. Only the
// first subclass instance should run.
if (currentState == GST_STATE_NULL && newState == GST_STATE_READY) {
bool alsoGetMultiqueue = false;
if (!g_strcmp0(G_OBJECT_TYPE_NAME(element.get()), "GstBrcmVidFilter")) {
state.m_vidfilter = element;
alsoGetMultiqueue = true;
} else if (!g_strcmp0(G_OBJECT_TYPE_NAME(element.get()), "GstBrcmAudFilter")) {
state.m_audfilter = element;
alsoGetMultiqueue = true;
} else if (!g_strcmp0(G_OBJECT_TYPE_NAME(element.get()), "GstQueue2"))
state.m_queue2 = element;
// Might have been already retrieved by vidfilter or audfilter, whichever appeared first.
if (alsoGetMultiqueue && !state.m_multiqueue) {
// Also get the multiqueue (if there's one) attached to the vidfilter/aacparse+audfilter.
// We'll need it later to correct the buffering level.
for (auto* sinkPad : GstIteratorAdaptor<GstPad>(GUniquePtr<GstIterator>(gst_element_iterate_sink_pads(element.get())))) {
GRefPtr<GstPad> peerSrcPad = adoptGRef(gst_pad_get_peer(sinkPad));
if (!peerSrcPad)
continue; // And end the loop, because there's only one srcpad.
GRefPtr<GstElement> peerElement = adoptGRef(GST_ELEMENT(gst_pad_get_parent(peerSrcPad.get())));
// If it's NOT a multiqueue, it's probably a parser like aacparse. We try to traverse before it.
if (peerElement && g_strcmp0(G_OBJECT_TYPE_NAME(element.get()), "GstMultiQueue")) {
for (auto* peerElementSinkPad : GstIteratorAdaptor<GstPad>(GUniquePtr<GstIterator>(gst_element_iterate_sink_pads(peerElement.get())))) {
peerSrcPad = adoptGRef(gst_pad_get_peer(peerElementSinkPad));
if (!peerSrcPad)
continue; // And end the loop.
// Now we hopefully have peerElement pointing to the multiqueue.
peerElement = adoptGRef(GST_ELEMENT(gst_pad_get_parent(peerSrcPad.get())));
break;
}
}
// The multiqueue reference is useless if we can't access its stats (on older GStreamer versions).
if (peerElement && !g_strcmp0(G_OBJECT_TYPE_NAME(element.get()), "GstMultiQueue")
&& gstObjectHasProperty(peerElement.get(), "stats"))
state.m_multiqueue = peerElement;
break;
}
}
} else if (currentState == GST_STATE_READY && newState == GST_STATE_NULL) {
if (!g_strcmp0(G_OBJECT_TYPE_NAME(element.get()), "GstBrcmVidFilter"))
state.m_vidfilter = nullptr;
else if (!g_strcmp0(G_OBJECT_TYPE_NAME(element.get()), "GstBrcmAudFilter"))
state.m_audfilter = nullptr;
else if (!g_strcmp0(G_OBJECT_TYPE_NAME(element.get()), "GstMultiQueue") && element == state.m_multiqueue.get())
state.m_multiqueue = nullptr;
else if (!g_strcmp0(G_OBJECT_TYPE_NAME(element.get()), "GstQueue2"))
state.m_queue2 = nullptr;
}
}
GStreamerQuirkBroadcomBase::GStreamerQuirkBroadcomBaseState& GStreamerQuirkBroadcomBase::ensureState(MediaPlayerPrivateGStreamer* playerPrivate) const
{
GStreamerQuirkBase::GStreamerQuirkState* state = playerPrivate->quirkState(this);
if (!state) {
GST_DEBUG("%s %p setting up quirk state on MediaPlayerPrivate %p", identifier().characters(), this, playerPrivate);
playerPrivate->setQuirkState(this, makeUnique<GStreamerQuirkBroadcomBaseState>());
state = playerPrivate->quirkState(this);
}
return reinterpret_cast<GStreamerQuirkBroadcomBaseState&>(*state);
}
#undef GST_CAT_DEFAULT
} // namespace WebCore
#endif // USE(GSTREAMER)
|
