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// anchorman - A program to stream webcams.
//
// Copyright (C) 2011 Trever Fischer <tdfischer@fedoraproject.org>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#define G_UDEV_API_IS_SUBJECT_TO_CHANGE
#include <gst/gst.h>
#include <gudev/gudev.h>
#include <string.h>
// Original gst-launch 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);
}
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