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
|
/*
* Copyright (C) 2012, 2015, 2016 Igalia S.L
* Copyright (C) 2015, 2016 Metrological Group B.V.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#if USE(GSTREAMER)
#include "GStreamerUtilities.h"
#include "GRefPtrGStreamer.h"
#include "IntSize.h"
#include <gst/audio/audio-info.h>
#include <gst/gst.h>
#include <wtf/MathExtras.h>
#include <wtf/glib/GUniquePtr.h>
#if ENABLE(VIDEO_TRACK) && USE(GSTREAMER_MPEGTS)
#define GST_USE_UNSTABLE_API
#include <gst/mpegts/mpegts.h>
#undef GST_USE_UNSTABLE_API
#endif
namespace WebCore {
const char* webkitGstMapInfoQuarkString = "webkit-gst-map-info";
GstPad* webkitGstGhostPadFromStaticTemplate(GstStaticPadTemplate* staticPadTemplate, const gchar* name, GstPad* target)
{
GstPad* pad;
GstPadTemplate* padTemplate = gst_static_pad_template_get(staticPadTemplate);
if (target)
pad = gst_ghost_pad_new_from_template(name, target, padTemplate);
else
pad = gst_ghost_pad_new_no_target_from_template(name, padTemplate);
gst_object_unref(padTemplate);
return pad;
}
#if ENABLE(VIDEO)
bool getVideoSizeAndFormatFromCaps(GstCaps* caps, WebCore::IntSize& size, GstVideoFormat& format, int& pixelAspectRatioNumerator, int& pixelAspectRatioDenominator, int& stride)
{
GstVideoInfo info;
gst_video_info_init(&info);
if (!gst_video_info_from_caps(&info, caps))
return false;
format = GST_VIDEO_INFO_FORMAT(&info);
size.setWidth(GST_VIDEO_INFO_WIDTH(&info));
size.setHeight(GST_VIDEO_INFO_HEIGHT(&info));
pixelAspectRatioNumerator = GST_VIDEO_INFO_PAR_N(&info);
pixelAspectRatioDenominator = GST_VIDEO_INFO_PAR_D(&info);
stride = GST_VIDEO_INFO_PLANE_STRIDE(&info, 0);
return true;
}
bool getSampleVideoInfo(GstSample* sample, GstVideoInfo& videoInfo)
{
if (!GST_IS_SAMPLE(sample))
return false;
GstCaps* caps = gst_sample_get_caps(sample);
if (!caps)
return false;
gst_video_info_init(&videoInfo);
if (!gst_video_info_from_caps(&videoInfo, caps))
return false;
return true;
}
#endif
GstBuffer* createGstBuffer(GstBuffer* buffer)
{
gsize bufferSize = gst_buffer_get_size(buffer);
GstBuffer* newBuffer = gst_buffer_new_and_alloc(bufferSize);
if (!newBuffer)
return 0;
gst_buffer_copy_into(newBuffer, buffer, static_cast<GstBufferCopyFlags>(GST_BUFFER_COPY_METADATA), 0, bufferSize);
return newBuffer;
}
GstBuffer* createGstBufferForData(const char* data, int length)
{
GstBuffer* buffer = gst_buffer_new_and_alloc(length);
gst_buffer_fill(buffer, 0, data, length);
return buffer;
}
char* getGstBufferDataPointer(GstBuffer* buffer)
{
GstMiniObject* miniObject = reinterpret_cast<GstMiniObject*>(buffer);
GstMapInfo* mapInfo = static_cast<GstMapInfo*>(gst_mini_object_get_qdata(miniObject, g_quark_from_static_string(webkitGstMapInfoQuarkString)));
return reinterpret_cast<char*>(mapInfo->data);
}
void mapGstBuffer(GstBuffer* buffer, uint32_t flags)
{
GstMapInfo* mapInfo = static_cast<GstMapInfo*>(fastMalloc(sizeof(GstMapInfo)));
if (!gst_buffer_map(buffer, mapInfo, static_cast<GstMapFlags>(flags))) {
fastFree(mapInfo);
gst_buffer_unref(buffer);
return;
}
GstMiniObject* miniObject = reinterpret_cast<GstMiniObject*>(buffer);
gst_mini_object_set_qdata(miniObject, g_quark_from_static_string(webkitGstMapInfoQuarkString), mapInfo, nullptr);
}
void unmapGstBuffer(GstBuffer* buffer)
{
GstMiniObject* miniObject = reinterpret_cast<GstMiniObject*>(buffer);
GstMapInfo* mapInfo = static_cast<GstMapInfo*>(gst_mini_object_steal_qdata(miniObject, g_quark_from_static_string(webkitGstMapInfoQuarkString)));
if (!mapInfo)
return;
gst_buffer_unmap(buffer, mapInfo);
fastFree(mapInfo);
}
bool initializeGStreamer()
{
if (gst_is_initialized())
return true;
GUniqueOutPtr<GError> error;
// FIXME: We should probably pass the arguments from the command line.
bool gstInitialized = gst_init_check(nullptr, nullptr, &error.outPtr());
ASSERT_WITH_MESSAGE(gstInitialized, "GStreamer initialization failed: %s", error ? error->message : "unknown error occurred");
#if ENABLE(VIDEO_TRACK) && USE(GSTREAMER_MPEGTS)
if (gstInitialized)
gst_mpegts_initialize();
#endif
return gstInitialized;
}
unsigned getGstPlayFlag(const char* nick)
{
static GFlagsClass* flagsClass = static_cast<GFlagsClass*>(g_type_class_ref(g_type_from_name("GstPlayFlags")));
ASSERT(flagsClass);
GFlagsValue* flag = g_flags_get_value_by_nick(flagsClass, nick);
if (!flag)
return 0;
return flag->value;
}
GstClockTime toGstClockTime(float time)
{
// Extract the integer part of the time (seconds) and the fractional part (microseconds). Attempt to
// round the microseconds so no floating point precision is lost and we can perform an accurate seek.
float seconds;
float microSeconds = modff(time, &seconds) * 1000000;
GTimeVal timeValue;
timeValue.tv_sec = static_cast<glong>(seconds);
timeValue.tv_usec = static_cast<glong>(floor(microSeconds + 0.5));
return GST_TIMEVAL_TO_TIME(timeValue);
}
bool gstRegistryHasElementForMediaType(GList* elementFactories, const char* capsString)
{
GRefPtr<GstCaps> caps = adoptGRef(gst_caps_from_string(capsString));
GList* candidates = gst_element_factory_list_filter(elementFactories, caps.get(), GST_PAD_SINK, false);
bool result = candidates;
gst_plugin_feature_list_free(candidates);
return result;
}
#if GST_CHECK_VERSION(1, 5, 3) && (ENABLE(LEGACY_ENCRYPTED_MEDIA) || ENABLE(ENCRYPTED_MEDIA))
GstElement* createGstDecryptor(const gchar* protectionSystem)
{
GstElement* decryptor = nullptr;
GList* decryptors = gst_element_factory_list_get_elements(GST_ELEMENT_FACTORY_TYPE_DECRYPTOR, GST_RANK_MARGINAL);
GST_TRACE("looking for decryptor for %s", protectionSystem);
for (GList* walk = decryptors; !decryptor && walk; walk = g_list_next(walk)) {
GstElementFactory* factory = reinterpret_cast<GstElementFactory*>(walk->data);
GST_TRACE("checking factory %s", GST_OBJECT_NAME(factory));
for (const GList* current = gst_element_factory_get_static_pad_templates(factory); current && !decryptor; current = g_list_next(current)) {
GstStaticPadTemplate* staticPadTemplate = static_cast<GstStaticPadTemplate*>(current->data);
GRefPtr<GstCaps> caps = adoptGRef(gst_static_pad_template_get_caps(staticPadTemplate));
unsigned length = gst_caps_get_size(caps.get());
GST_TRACE("factory %s caps has size %u", GST_OBJECT_NAME(factory), length);
for (unsigned i = 0; !decryptor && i < length; ++i) {
GstStructure* structure = gst_caps_get_structure(caps.get(), i);
GST_TRACE("checking structure %s", gst_structure_get_name(structure));
if (gst_structure_has_field_typed(structure, GST_PROTECTION_SYSTEM_ID_CAPS_FIELD, G_TYPE_STRING)) {
const gchar* sysId = gst_structure_get_string(structure, GST_PROTECTION_SYSTEM_ID_CAPS_FIELD);
GST_TRACE("structure %s has protection system %s", gst_structure_get_name(structure), sysId);
if (!g_ascii_strcasecmp(protectionSystem, sysId)) {
GST_DEBUG("found decryptor %s for %s", GST_OBJECT_NAME(factory), protectionSystem);
decryptor = gst_element_factory_create(factory, nullptr);
break;
}
}
}
}
}
gst_plugin_feature_list_free(decryptors);
GST_TRACE("returning decryptor %p", decryptor);
return decryptor;
}
#endif
}
#endif // USE(GSTREAMER)
|
