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
|
/*
* Copyright (C) 2018,2019 Konsulko Group
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "fileplayer.h"
#include <string>
#include <cstring>
#include <iostream>
#include <mutex>
#undef DEBUG
static void *gst_loop_thread(GMainLoop *loop)
{
if(loop)
g_main_loop_run(loop);
}
FilePlayer::FilePlayer(const std::string &path, const std::string &role) :
m_path(path),
m_role(role)
{
std::string uri;
// Initialize GStreamer
gst_init(NULL, NULL);
// Create elements we need
m_playbin = gst_element_factory_make("playbin", "play");
m_audio_sink = gst_element_factory_make("pipewiresink", NULL);
if(!(m_playbin && m_audio_sink))
goto error;
gst_util_set_object_arg(G_OBJECT(m_audio_sink), "stream-properties", "p,media.role=Communication");
// Set up bus callback
m_bus = gst_pipeline_get_bus(GST_PIPELINE(m_playbin));
if(!m_bus)
goto error;
m_gst_loop = g_main_loop_new(NULL, FALSE);
if(!m_gst_loop)
goto error;
gst_bus_add_watch(m_bus, gstreamer_bus_callback, this);
// Start thread to run glib main loop for gstreamer bus
m_gst_thread = std::thread(gst_loop_thread, m_gst_loop);
m_valid = true;
return;
error:
gst_object_unref(m_playbin);
m_playbin = nullptr;
gst_object_unref(m_audio_sink);
m_audio_sink = nullptr;
gst_object_unref(m_bus);
m_bus = nullptr;
if(m_gst_loop) {
g_main_loop_quit(m_gst_loop);
m_gst_loop = nullptr;
}
return;
}
FilePlayer::~FilePlayer(void)
{
gst_element_set_state(m_playbin, GST_STATE_NULL);
gst_object_unref(m_playbin);
gst_object_unref(m_audio_sink);
gst_object_unref(m_bus);
}
void FilePlayer::play(bool loop)
{
if(!m_valid || m_playing)
return;
m_playing = true;
m_looping = loop;
g_object_set(m_playbin, "audio-sink", m_audio_sink, NULL);
std::string uri = "file://" + m_path;
g_object_set(m_playbin, "uri", uri.c_str(), NULL);
// Start playback
gst_element_set_state(m_playbin, GST_STATE_PLAYING);
return;
}
void FilePlayer::stop(void)
{
if(!(m_valid && m_playing))
return;
// Stop playback
gst_element_set_state(m_playbin, GST_STATE_PAUSED);
}
gboolean FilePlayer::gstreamer_bus_callback(GstBus *bus, GstMessage *msg, gpointer data)
{
if(!data)
return TRUE;
return static_cast<FilePlayer*>(data)->bus_callback(bus, msg);
}
gboolean FilePlayer::bus_callback(GstBus *bus, GstMessage *msg)
{
switch (GST_MESSAGE_TYPE(msg)) {
case GST_MESSAGE_EOS:
#ifdef DEBUG
std::cerr << __FUNCTION__ << ": GST_MESSAGE_EOS" << std::endl;
#endif
if(m_looping) {
// restart playback if at end
if (!gst_element_seek(m_playbin,
1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
GST_SEEK_TYPE_SET, 0,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE)) {
std::cerr << "Seek failed!" << std::endl;
}
} else {
// Move stream to paused state since we're done
gst_element_set_state(m_playbin, GST_STATE_PAUSED);
}
break;
case GST_MESSAGE_STATE_CHANGED: {
if((GstElement*) GST_MESSAGE_SRC(msg) != m_playbin)
break;
GstState old_state, new_state;
gst_message_parse_state_changed(msg, &old_state, &new_state, NULL);
#ifdef DEBUG
std::cerr << __FUNCTION__ << ": GST_MESSAGE_STATE_CHANGE: " << (int) old_state << " to " << (int) new_state << std::endl;
#endif
if(old_state == GST_STATE_PLAYING && new_state == GST_STATE_PAUSED) {
// Seek back to beginning so any subsequent play starts there
if (!gst_element_seek(m_playbin,
1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
GST_SEEK_TYPE_SET, 0,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE)) {
std::cerr << "Seek failed!" << std::endl;
}
m_playing = false;
} else if(old_state == GST_STATE_READY && new_state == GST_STATE_NULL) {
// clean up
g_main_loop_quit(m_gst_loop);
}
break;
}
default:
break;
}
return TRUE;
}
|
