From 217545542d79137d9ce42ad8fed8376db682feba Mon Sep 17 00:00:00 2001
From: Johns <johns98@gmx.net>
Date: Mon, 23 Jan 2012 20:23:05 +0100
Subject: Add ac3 pass-through device to OSS module.

---
 audio.c | 49 +++++++++++++++++++++++++++++++++++++------------
 1 file changed, 37 insertions(+), 12 deletions(-)

(limited to 'audio.c')

diff --git a/audio.c b/audio.c
index 0b12610..0f27915 100644
--- a/audio.c
+++ b/audio.c
@@ -1442,25 +1442,41 @@ static void OssThreadFlushBuffers(void)
 //----------------------------------------------------------------------------
 
 /**
-**	Initialize OSS pcm device.
+**	Open OSS pcm device.
 **
-**	@see AudioPCMDevice
+**	@param use_ac3	use ac3/pass-through device
 */
-static void OssInitPCM(void)
+static int OssOpenPCM(int use_ac3)
 {
     const char *device;
     int fildes;
 
-    if (!(device = AudioPCMDevice)) {
-	if (!(device = getenv("OSS_AUDIODEV"))) {
-	    device = "/dev/dsp";
-	}
+    // &&|| hell
+    if (!(use_ac3 && ((device = AudioAC3Device)
+		|| (device = getenv("OSS_AC3_AUDIODEV"))))
+	&& !(device = AudioPCMDevice) && !(device = getenv("OSS_AUDIODEV"))) {
+	device = "/dev/dsp";
     }
+    Debug(3, "audio/oss: &&|| hell '%s'\n", device);
+
     if ((fildes = open(device, O_WRONLY)) < 0) {
 	Error(_("audio/oss: can't open dsp device '%s': %s\n"), device,
 	    strerror(errno));
-	return;
+	return -1;
     }
+    return fildes;
+}
+
+/**
+**	Initialize OSS pcm device.
+**
+**	@see AudioPCMDevice
+*/
+static void OssInitPCM(void)
+{
+    int fildes;
+
+    fildes = OssOpenPCM(0);
 
     OssPcmFildes = fildes;
 }
@@ -1601,8 +1617,7 @@ static uint64_t OssGetDelay(void)
 **
 **	@todo audio changes must be queued and done when the buffer is empty
 */
-static int OssSetup(int *freq, int *channels, __attribute__ ((unused))
-    int use_ac3)
+static int OssSetup(int *freq, int *channels, int use_ac3)
 {
     int ret;
     int tmp;
@@ -1613,6 +1628,18 @@ static int OssSetup(int *freq, int *channels, __attribute__ ((unused))
     // flush any buffered data
     AudioFlushBuffers();
 
+    if (1) {				// close+open for pcm / ac3
+	int fildes;
+
+	fildes = OssPcmFildes;
+	OssPcmFildes = -1;
+	close(fildes);
+	if (!(fildes = OssOpenPCM(use_ac3))) {
+	    return -1;
+	}
+	OssPcmFildes = fildes;
+    }
+
     ret = 0;
 
     tmp = AFMT_S16_NE;			// native 16 bits
@@ -1701,8 +1728,6 @@ static int OssSetup(int *freq, int *channels, __attribute__ ((unused))
 
 /**
 **	Initialize OSS audio output module.
-**
-**	@param use_ac3	use ac3/pass-through device
 */
 static void OssInit(void)
 {
-- 
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