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
|
#define G_UDEV_API_IS_SUBJECT_TO_CHANGE
#include <gst/gst.h>
#include <gudev/gudev.h>
#include <string.h>
// Original command:
// gst-launch v4l2src device=/dev/video0 ! ffmpegcolorspace ! videorate ! videoscale ! video/x-raw-yuv,width=320,height=240 ! theoraenc bitrate=64 ! queue leaky=1 ! oggmux name=mux alsasrc device=hw:1 ! audioconvert ! vorbisenc ! queue leaky=1 ! mux. mux. ! queue ! shout2send ip=acm.cs.uakron.edu mount=lab.ogg
GMainLoop *loop;
static gchar *videoDevice = 0;
static gchar *audioDevice = 0;
static gchar *icecastServer = 0;
static gchar *icecastMount = 0;
static GOptionEntry entries[] =
{
{ "video-device", 'v', 0, G_OPTION_ARG_STRING, &videoDevice, "Video device to use", "device" },
{ "audio-device", 'a', 0, G_OPTION_ARG_STRING, &audioDevice, "Audio device to use", "device" },
{ "server", 's', 0, G_OPTION_ARG_STRING, &icecastServer, "Icecast server to stream to", "server" },
{ "mount", 'm', 0, G_OPTION_ARG_STRING, &icecastMount, "Icecast mount to stream to on the server", "mount" },
{ NULL }
};
static const gchar *subsystems[] =
{
"video4linux",
NULL
};
gboolean startPipeline(GstElement *pipe) {
GstStateChangeReturn stateChange;
stateChange = gst_element_set_state(pipe, GST_STATE_PLAYING);
switch(stateChange) {
case GST_STATE_CHANGE_SUCCESS:
case GST_STATE_CHANGE_ASYNC:
return TRUE;
default:
return FALSE;
}
}
gboolean stopPipeline(GstElement *pipe) {
GstStateChangeReturn stateChange;
stateChange = gst_element_set_state(pipe, GST_STATE_NULL);
switch(stateChange) {
case GST_STATE_CHANGE_SUCCESS:
case GST_STATE_CHANGE_ASYNC:
return TRUE;
default:
return FALSE;
}
}
void newDevice_cb(GUdevClient *client, gchar *action, GUdevDevice *device, gpointer data)
{
g_debug("Got %s event for %s", action, g_udev_device_get_name(device));
if (strcmp(g_udev_device_get_device_file(device), videoDevice) == 0) {
if (strcmp(action, "add") == 0) {
g_print("Device added.\n");
while(!startPipeline((GstElement*)data));
} else if (strcmp(action, "remove") == 0) {
g_print("Device removed.\n");
while(!stopPipeline((GstElement*)data));
}
}
}
static gboolean message_cb(GstBus *bus, GstMessage *msg, gpointer data)
{
g_debug("Got message %s", GST_MESSAGE_TYPE_NAME(msg));
}
static gboolean state_cb(GstBus *bus, GstMessage *msg, gpointer data)
{
GstState oldState;
GstState newState;
GstState pendingState;
gchar *name;
gst_message_parse_state_changed(msg, &oldState, &newState, &pendingState);
name = gst_element_get_name(msg->src);
g_debug("Element %s changed state from %s to %s", name, gst_element_state_get_name(oldState), gst_element_state_get_name(newState));
g_free(name);
}
static gboolean error_cb(GstBus *bus, GstMessage *msg, gpointer data)
{
GError *err;
gchar *debug;
gst_message_parse_error(msg, &err, &debug);
g_free(debug);
if (err->domain == GST_RESOURCE_ERROR) {
if (err->code == GST_RESOURCE_ERROR_OPEN_READ) {
g_debug("Could not open a device: %s", err->message);
goto out;
}
} else {
g_error("%d: %s", err->code, err->message);
}
g_main_loop_quit(loop);
out:
g_error_free(err);
}
static gboolean warning_cb(GstBus *bus, GstMessage *msg, gpointer data)
{
GError *err;
gchar *debug;
gst_message_parse_warning(msg, &err, &debug);
g_free(debug);
g_warning("%d %d: %s", err->domain, err->code, err->message);
if (err->domain == 992 && err->code == 13)
while(!stopPipeline((GstElement*)data));
g_error_free(err);
}
GstElement *buildPipeline(const gchar *videoDev, const gchar *audioDev, const gchar *server, const gchar *mount)
{
GstElement *pipe = gst_pipeline_new(NULL);
// Video pipeline
GstElement *v4lsrc = gst_element_factory_make("v4l2src", NULL);
GstElement *convert = gst_element_factory_make("ffmpegcolorspace", NULL);
GstElement *rate = gst_element_factory_make("videorate", NULL);
GstElement *scale = gst_element_factory_make("videoscale", NULL);
GstElement *encode = gst_element_factory_make("theoraenc", NULL);
GstElement *videoQueue = gst_element_factory_make("queue", NULL);
gst_bin_add_many(GST_BIN(pipe), v4lsrc, convert, rate, scale, encode, videoQueue, NULL);
gst_element_link(encode, videoQueue);
gst_element_link_many(v4lsrc, convert, rate, scale);
GstCaps *caps = gst_caps_new_simple("video/x-raw-yuv", "width", G_TYPE_INT, 480, "height", G_TYPE_INT, 360, NULL);
gst_element_link_filtered(scale, encode, caps);
// Audio pipeline
GstElement *alsasrc = gst_element_factory_make("alsasrc", NULL);
GstElement *audioConvert = gst_element_factory_make("audioconvert", NULL);
GstElement *vorbisenc = gst_element_factory_make("vorbisenc", NULL);
GstElement *audioQueue = gst_element_factory_make("queue", NULL);
gst_bin_add_many(GST_BIN(pipe), alsasrc, audioConvert, vorbisenc, audioQueue, NULL);
gst_element_link_many(alsasrc, audioConvert, vorbisenc, audioQueue, NULL);
// Combine
GstElement *oggMux = gst_element_factory_make("oggmux", NULL);
gst_bin_add(GST_BIN(pipe), oggMux);
gst_element_link(videoQueue, oggMux);
gst_element_link(audioQueue, oggMux);
// Broadcast!
GstElement *shout = gst_element_factory_make("shout2send", NULL);
gst_bin_add(GST_BIN(pipe), shout);
gst_element_link(oggMux, shout);
GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(pipe));
gst_bus_add_signal_watch(bus);
g_signal_connect(bus, "message::error", G_CALLBACK(error_cb), pipe);
g_signal_connect(bus, "message::warning", G_CALLBACK(warning_cb), pipe);
g_signal_connect(bus, "message::state-changed", G_CALLBACK(state_cb), pipe);
g_signal_connect(bus, "message", G_CALLBACK(message_cb), pipe);
if (audioDevice)
g_object_set(G_OBJECT(alsasrc), "device", audioDev, NULL);
if (videoDevice)
g_object_set(G_OBJECT(v4lsrc), "device", videoDev, NULL);
if (icecastServer)
g_object_set(G_OBJECT(shout), "ip", server, NULL);
if (icecastMount)
g_object_set(G_OBJECT(shout), "mount", mount, NULL);
g_object_set(G_OBJECT(encode), "bitrate", 64, NULL);
g_object_set(G_OBJECT(videoQueue), "leaky", 1, NULL);
g_object_set(G_OBJECT(audioQueue), "leaky", 1, NULL);
return pipe;
}
int main(int argc, char* argv[])
{
GError *error;
GOptionContext *context;
GstStateChangeReturn stateChange;
GUdevDevice *dev;
GUdevClient *udevClient;
GstElement *pipe;
g_thread_init(NULL);
context = g_option_context_new(" - Stream a webcam to an icecast server");
g_option_context_add_main_entries(context, entries, NULL);
g_option_context_add_group(context, gst_init_get_option_group());
if (!g_option_context_parse(context, &argc, &argv, &error)) {
g_print("Bad arguments: %s\n", error->message);
exit(1);
}
if (!gst_init_check(&argc, &argv, &error)) {
g_print("Could not initialize GStreamer: %s\n", error->message);
exit(1);
}
if (!videoDevice) {
videoDevice = strdup("/dev/video0");
}
pipe = buildPipeline(videoDevice, audioDevice, icecastServer, icecastMount);
udevClient = g_udev_client_new(subsystems);
g_signal_connect(udevClient, "uevent", G_CALLBACK(newDevice_cb), pipe);
startPipeline(pipe);
loop = g_main_loop_new(NULL, FALSE);
g_main_loop_run(loop);
}
|
