Added support for changing virtual sound hardware

Added new configuration file option "sound_card" and new command-line
switch "--sound-card" to change the virtual sound hardware. Allowed
options are "intel-hda" (default), "ac97", "es1370", "sb16", and "none".
Also changed default sound card for Solaris to "ac97" and for FreeDOS to
"sb16".

quickemu

@@ -235,6 +235,7 @@ function vm_boot() {
   local MAC_DISK_DEV="${MAC_DISK_DEV:-ide-hd,bus=ahci.2}"
   local NET_DEVICE="${NET_DEVICE:-virtio-net}"
   local OSK=""
+  local SOUND=""
   local SMM="${SMM:-off}"
   local USB_HOST_PASSTHROUGH_CONTROLLER="qemu-xhci"
   local VGA=""
@@ -484,11 +485,13 @@ function vm_boot() {
       if [ "${guest_os}" == "freedos" ] ; then
         # fix for #382
         SMM="on"
+        SOUND_CARD="sb16"
       fi
 
       if [[ "${guest_os}" == *"solaris" ]]; then
         MACHINE_TYPE="pc"
         USB_CONTROLLER="xhci"
+        SOUND_CARD="ac97"
       fi
 
       if [ -z "${disk_size}" ]; then
@@ -788,6 +791,16 @@ function vm_boot() {
   # Add fullscreen options
   VIDEO="${VGA} ${VIDEO} ${FULLSCREEN}"
 
+  # Build the sound hardware configuration
+  if [ "${SOUND_CARD}" == "intel-hda" ]; then
+    SOUND="-device intel-hda -device hda-duplex,audiodev=audio0"
+  elif [ "${SOUND_CARD}" == "ac97" ] || [ "${SOUND_CARD}" == "es1370" ] || [ "${SOUND_CARD}" == "sb16" ]; then
+    SOUND="-device ${SOUND_CARD},audiodev=audio0"
+  elif [ "${SOUND_CARD}" == "none" ]; then
+    SOUND=""
+  fi
+  echo " - Sound:    ${SOUND_CARD}"
+
   # Set the hostname of the VM
   local NET="user,hostname=${VMNAME}"
 
@@ -916,7 +929,7 @@ function vm_boot() {
          -m ${RAM_VM} ${BALLOON}
          ${VIDEO} -display ${DISPLAY_RENDER}
          -audiodev ${AUDIO_DEV}
-         -device intel-hda -device hda-duplex,audiodev=audio0
+         ${SOUND}
          -rtc base=localtime,clock=host,driftfix=slew)
 
   # Only enable SPICE is using SPICE display
@@ -1336,6 +1349,7 @@ function usage() {
   echo "  --keyboard_layout <layout>        : Set keyboard layout."
   echo "  --mouse <type>                    : Set mouse. @Options: 'tablet' (default), 'ps2', 'usb', 'virtio'"
   echo "  --usb-controller <type>           : Set usb-controller. @Options: 'ehci' (default), 'xhci', 'none'"
+  echo "  --sound-card <type>               : Set sound card. @Options: 'intel-hda' (default), 'ac97', 'es1370', 'sb16', 'none'"
   echo "  --extra_args <arguments>          : Pass additional arguments to qemu"
   echo "  --version                         : Print version"
   exit 1
@@ -1348,6 +1362,13 @@ function display_param_check() {
   fi
 }
 
+function sound_card_param_check() {
+  if [ "${SOUND_CARD}" != "intel-hda" ] && [ "${SOUND_CARD}" != "ac97" ] && [ "${SOUND_CARD}" != "es1370" ] && [ "${SOUND_CARD}" != "sb16" ] && [ "${SOUND_CARD}" != "none" ]; then
+    echo "ERROR! Requested sound card '${SOUND_CARD}' is not recognised."
+    exit 1
+  fi
+}
+
 function viewer_param_check() {
   if [ "${VIEWER}" != "none" ] && [ "${VIEWER}" != "spicy" ] && [ "${VIEWER}" != "remote-viewer" ]; then
     echo "ERROR! Requested viewer '${VIEWER}' is not recognised."
@@ -1468,6 +1489,8 @@ keyboard="usb"
 keyboard_layout="en-us"
 # options: ps2, usb, tablet, virtio
 mouse="tablet"
+# options: intel-hda, ac97, es1370, sb16, none
+sound_card="intel-hda"
 
 BRAILLE=""
 DELETE_DISK=0
@@ -1505,6 +1528,7 @@ KEYBOARD_LAYOUT=""
 MOUSE=""
 USB_CONTROLLER=""
 EXTRA_ARGS=""
+SOUND_CARD=""
 
 # shellcheck disable=SC2155
 readonly LAUNCHER=$(basename "${0}")
@@ -1642,6 +1666,10 @@ else
             EXTRA_ARGS="${2}"
             shift;
             shift;;
+          -sound-card|--sound-card)
+            SOUND_CARD="${2}"
+            shift;
+            shift;;
           -version|--version)
             echo "${VERSION}"
             exit;;
@@ -1744,6 +1772,11 @@ if [ -n "${VM}" ] && [ -e "${VM}" ]; then
     exit 1
   fi
 
+  if [ -z "${SOUND_CARD}" ]; then
+    SOUND_CARD="${sound_card}"
+  fi
+  sound_card_param_check
+
   # Check if vm is already run
   VM_PID=0
   VM_UP=0