[Performous-commit] Tapio Vierros : Allow configuring which webcam to use.

[Tapio V. <aa...@us...>]

Module: performous
Branch: portaudio
Commit: 50f43a7b2d262320ca55ae2654e4cc539ee2b0af

Author: Tapio Vierros <tap...@gm...>
Date:   Wed Aug 11 19:02:48 2010 +0300

Allow configuring which webcam to use.

---

 data/schema.xml     |    7 +++++++
 game/screen_sing.cc |    4 ++--
 game/webcam.cc      |   12 +++++++++---
 3 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/data/schema.xml b/data/schema.xml
index 1eea68e..2352133 100644
--- a/data/schema.xml
+++ b/data/schema.xml
@@ -124,6 +124,13 @@ to save the current settings to XML.
 			<long>Performous can try to use webcam as a background video. You can disable it if it annoys you.</long>
 		</locale>
 	</entry>
+	<entry name="graphic/webcamid" type="int" value="-1">
+		<limits min="-1" max="9" step="1" />
+		<locale name="C">
+			<short>Webcam id</short>
+			<long>Use -1 to autodetect or a number starting from 0 to choose specific device.</long>
+		</locale>
+	</entry>
 	<entry name="graphic/3d_notes" type="bool" value="true">
 		<locale name="C">
 			<short>3D notes</short>
diff --git a/game/screen_sing.cc b/game/screen_sing.cc
index dd822f3..e4ea994 100644
--- a/game/screen_sing.cc
+++ b/game/screen_sing.cc
@@ -59,7 +59,7 @@ void ScreenSing::enter() {
 	}
 	// Initialize webcam
 	if (config["graphic/webcam"].b() && Webcam::enabled()) {
-		m_cam.reset(new Webcam());
+		m_cam.reset(new Webcam(config["graphic/webcamid"].i()));
 	}
 	// Load video
 	if (!m_song->video.empty() && config["graphic/video"].b()) {
@@ -253,7 +253,7 @@ void ScreenSing::manageEvent(SDL_Event event) {
 		if (key == SDLK_w) dispInFlash(++config["game/pitch"]); // Toggle pitch wave
 		// Toggle webcam
 		if (key == SDLK_a && Webcam::enabled()) {
-			if (!m_cam) m_cam.reset(new Webcam()); // Initialize if we haven't done that already
+			if (!m_cam) m_cam.reset(new Webcam(config["graphic/webcamid"].i())); // Initialize if we haven't done that already
 			if (m_cam) { dispInFlash(++config["graphic/webcam"]); m_cam->pause(!config["graphic/webcam"].b()); }
 		}
 		// Latency settings
diff --git a/game/webcam.cc b/game/webcam.cc
index e29ca66..aff3c8a 100644
--- a/game/webcam.cc
+++ b/game/webcam.cc
@@ -18,8 +18,14 @@ Webcam::Webcam(int cam_id):
 	// Initialize the capture device
 	m_capture = cvCaptureFromCAM(cam_id);
 	if (!m_capture) {
-		std::cout << "Could not initialize webcam capturing!" << std::endl;
-		return;
+		if (cam_id != -1) {
+			std::cout << "Webcam id " << cam_id << " failed, trying autodetecting...";
+			m_capture = cvCaptureFromCAM(-1);
+		}
+		if (!m_capture) {
+			std::cout << "Could not initialize webcam capturing!" << std::endl;
+			return;
+		}
 	}
 	// Initialize the video writer
 	#ifdef SAVE_WEBCAM_VIDEO
@@ -27,7 +33,7 @@ Webcam::Webcam(int cam_id):
 	int framew = cvGetCaptureProperty(m_capture, CV_CAP_PROP_FRAME_WIDTH);
 	int frameh = cvGetCaptureProperty(m_capture, CV_CAP_PROP_FRAME_HEIGHT);
 	int codec = CV_FOURCC('P','I','M','1'); // MPEG-1
-	std::string out_file((getHomeDir() / std::string("/performous-webcam_out.mpg")).string());
+	std::string out_file((getHomeDir() / std::string("performous-webcam_out.mpg")).string());
 	m_writer = cvCreateVideoWriter(out_file.c_str(), codec, fps > 0 ? fps : 30.0f, cvSize(framew,frameh));
 	if (!m_writer) std::cout << "Could not initialize webcam video saving!" << std::endl;
 	#endif