tinyalsa: fix: format conversion

Expand format conversion function to allow FLOAT

Signed-off-by: Arkadiusz Cholewinski <arkadiuszx.cholewinski@intel.com>

Author: gbarkadiusz

case-lib/lib.sh

@@ -774,8 +774,22 @@ parse_audio_device() {
 # There is passes PCM sample format while using ALSA tool (arecord)
 # While using TinyALSA (tinycap -b) we need to convert PCM sample fomrat to bits.
 extract_format_number() {
-    # (e.g., extracting '16' from 'S16_LE')
-    printf '%s' "$1" | grep '[0-9]\+' -o
+    local format_string="$1"
+
+    case "$format_string" in
+        # Extract number for SXX_LE formats
+        S[0-9]*_LE)
+            printf '%s' "$format_string" | grep '[0-9]\+' -o
+            ;;
+        # Handle FLOAT format specifically
+        FLOAT)
+            printf '32' # Assuming 32-bit float
+            ;;
+        *)
+            # Default or error handling for unsupported formats
+            die "Unknown format"
+            ;;
+    esac
 }
 
 # Initialize the parameters using for audio testing.