From 8c16466d318350b769615ee365ecc2b6a85dda5d Mon Sep 17 00:00:00 2001
From: Johns <johns98@gmx.net>
Date: Thu, 9 Feb 2012 16:01:36 +0100
Subject: [PATCH] Set mixer channel through command line option

---
 ChangeLog   |  1 +
 audio.c     | 14 +++++++++++++-
 audio.h     |  3 ++-
 softhddev.c | 10 +++++++---
 4 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index fc9167c..7afc013 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 User johns
 Date:
 
+    Mixer channel could be set through command line option.
     Fix bug: LFE moved to wrong position.
     Guard suspend/resume against multiple calls.
     Add support for AAC LATM audio streams.
diff --git a/audio.c b/audio.c
index 4a72161..5dec74a 100644
--- a/audio.c
+++ b/audio.c
@@ -822,7 +822,7 @@ static void AlsaInitMixer(void)
 	    const char *name;
 
 	    name = snd_mixer_selem_get_name(alsa_mixer_elem);
-	    if (strcasecmp(name, alsa_mixer_elem_name) == 0) {
+	    if (!strcasecmp(name, alsa_mixer_elem_name)) {
 		snd_mixer_selem_get_playback_volume_range(alsa_mixer_elem,
 		    &alsa_mixer_elem_min, &alsa_mixer_elem_max);
 		AlsaRatio =
@@ -2150,6 +2150,18 @@ void AudioSetDeviceAC3(const char *device)
     AudioAC3Device = device;
 }
 
+/**
+**	Set pcm audio mixer channel.
+**
+**	@param channel	name of the mixer channel (fe. PCM or Master)
+**
+**	@note this is currently used to select alsa/OSS output module.
+*/
+void AudioSetChannel(const char *channel)
+{
+    AudioMixerChannel = channel;
+}
+
 /**
 **	Initialize audio output module.
 **
diff --git a/audio.h b/audio.h
index 292e1ae..f0dedab 100644
--- a/audio.h
+++ b/audio.h
@@ -43,7 +43,8 @@ extern int AudioSetup(int *, int *, int);	///< setup audio output
 //extern void AudioPause(void);		///< pause audio
 
 extern void AudioSetDevice(const char *);	///< set PCM audio device
-extern void AudioSetDeviceAC3(const char *);	///< set Passthrough device
+extern void AudioSetDeviceAC3(const char *);	///< set pass-through device
+extern void AudioSetChannel(const char *);	///< set mixer channel
 extern void AudioInit(void);		///< setup audio module
 extern void AudioExit(void);		///< cleanup and exit audio module
 
diff --git a/softhddev.c b/softhddev.c
index 77e026f..40f8125 100644
--- a/softhddev.c
+++ b/softhddev.c
@@ -1230,7 +1230,8 @@ void OsdDrawARGB(int x, int y, int height, int width, const uint8_t * argb)
 const char *CommandLineHelp(void)
 {
     return "  -a device\taudio device (fe. alsa: hw:0,0 oss: /dev/dsp)\n"
-	"  -p device\taudio device (alsa only) for pass-through (hw:0,1)\n"
+	"  -p device\taudio device for pass-through (hw:0,1 or /dev/dsp1)\n"
+	"  -c channel\taudio mixer channel name (fe. PCM)\n"
 	"  -d display\tdisplay of x11 server (fe. :0.0)\n"
 	"  -f\t\tstart with fullscreen window (only with window manager)\n"
 	"  -g geometry\tx11 window geometry wxh+x+y\n"
@@ -1253,10 +1254,13 @@ int ProcessArgs(int argc, char *const argv[])
     //	Parse arguments.
     //
     for (;;) {
-	switch (getopt(argc, argv, "-a:d:fg:p:sw:x")) {
-	    case 'a':			// audio device
+	switch (getopt(argc, argv, "-a:c:d:fg:p:sw:x")) {
+	    case 'a':			// audio device for pcm
 		AudioSetDevice(optarg);
 		continue;
+	    case 'c':			// channel of audio mixer
+		AudioSetChannel(optarg);
+		continue;
 	    case 'p':			// pass-through audio device
 		AudioSetDeviceAC3(optarg);
 		continue;