TinyAlsa: Add support for tinyAlsa.

Add support for tinyALSA and update README file.

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

Author: gbarkadiusz

README.md

@@ -18,6 +18,12 @@ expect alsa-utils python3 python3-construct python3-graphviz
 ```
 sudo apt install expect alsa-utils python3 python3-construct python3-graphviz
 ```
+If you would like to use tinyALSA for testing, install tinyALSA and SoX.
+How to install tinyALSA: https://github.com/tinyalsa/tinyalsa
+To install SoX run below command:
+```
+sudo apt-install sox
+```
 #### user group
 sudo adm audio
 
@@ -52,12 +58,14 @@ Usage: ./check-playback.sh [OPTION]
 2020-03-19 22:13:32 UTC [COMMAND] aplay -q --fatal-errors  -Dhw:0,0 -r 48000 -c 2 -f S16_LE -d 4 /dev/zero -v -q
     ...
 ```
-
-Some tests support SOF_ALSA_OPTS, SOF_APLAY_OPTS and SOF_ARECORD_OPTS,
-work in progress. Where supported, optional parameters in SOF_APLAY_OPTS
-and SOF_ARECORD_OPTS are passed to all aplay and arecord
-invocations. SOF_ALSA_OPTS parameters are passed to both aplay and
-arecord. Warning these environments variables do NOT support parameters
+Some tests support these environment variables (work in progress):
+  - SOF_ALSA_TOOL is used to select the audio tool for testing.
+  Set this variable to 'alsa' (default value) or 'tinyalsa' to choose between the ALSA and TinyALSA toolsets.
+  - SOF_ALSA_OPTS contains optional parameters passed on both play and record.
+  - SOF_APLAY_OPTS and SOF_ARECORD_OPTS contain optional parameters passed additionally on play and record respectively.
+These options are applied to the selected tool (alsa or tinyalsa) based on the value of SOF_ALSA_TOOL 
+
+Warning these environments variables do NOT support parameters
 with whitespace or globbing characters, in other words this does NOT
 work:
 

case-lib/lib.sh

@@ -752,17 +752,85 @@ func_lib_check_pa()
 # However, 1. arrays would complicate the user interface 2. ALSA does not
 # seem to need arguments with whitespace or globbing characters.
 
+# SOF_ALSA_TOOL:
+# This option is used for selecting tool for testing,
+# So far, supported tools are 'alsa' and 'tinyalsa'
+# To select appropriate tool, set SOF_ALSA_TOOL to one of above
+# before using 'aplay_opts' or 'arecord_opts' function.
+# Default is SOF_ALSA_TOOL='alsa'
+
+
+# Function to extract the card number and device number from $dev option (e.g., hw:0,10)
+parse_audio_device() {
+    # Extract the card number (e.g., "0" from hw:0,10)
+    card_nr=$(printf '%s' "$1" | cut -d ':' -f2 | cut -d ',' -f1)
+
+    # Extract the device number (e.g., "10" from hw:0,10)
+    dev_nr=$(printf '%s' "$1" | cut -d ',' -f2)
+}
+
+# Function to extract the numeric format value from the PCM sample formats
+# There is passes PCM sample format while using ALSA tool (arecord)
+# While using TinyALSA (tinycap -b) we need to convert PCM sample fomrat to bits.
+extract_format_number() {
+    # (e.g., extracting '16' from 'S16_LE')
+    format=$(printf '%s' "$1" | grep '[0-9]\+' -o)
+}
+
+# Initialize the parameters using for audio testing.
+# shellcheck disable=SC2034
+initialize_audio_params()
+{
+    local idx="$1"
+
+    channel=$(func_pipeline_parse_value "$idx" channel)
+    rate=$(func_pipeline_parse_value "$idx" rate)
+    fmts=$(func_pipeline_parse_value "$idx" fmt)
+    dev=$(func_pipeline_parse_value "$idx" dev)
+    pcm=$(func_pipeline_parse_value "$idx" pcm)
+    type=$(func_pipeline_parse_value "$idx" type)
+    snd=$(func_pipeline_parse_value "$idx" snd)
+
+    : "${SOF_ALSA_TOOL:="alsa"}"
+    if [[ "$SOF_ALSA_TOOL" = "tinyalsa" ]]; then
+       parse_audio_device "$dev"
+    fi
+}
+
 aplay_opts()
 {
-    dlogc "aplay $SOF_ALSA_OPTS $SOF_APLAY_OPTS $*"
-    # shellcheck disable=SC2086
-    aplay $SOF_ALSA_OPTS $SOF_APLAY_OPTS "$@"
+    if [[ "$SOF_ALSA_TOOL" = "tinyalsa" ]]; then
+        dlogc "tinyplay $SOF_ALSA_OPTS $SOF_APLAY_OPTS $*"
+        # shellcheck disable=SC2154
+	if ! sox -n -r "$rate" -c "$channel" noise.wav synth "$duration" white; then
+            printf '%s' "Error: sox command failed." >&2
+            exit 1
+	fi
+        tinyplay "$SOF_ALSA_OPTS" "$SOF_APLAY_OPTS" -D "$card_nr" -d "$dev_nr"  -i wav noise.wav
+    elif [[ "$SOF_ALSA_TOOL" = "alsa" ]]; then
+        dlogc "aplay $SOF_ALSA_OPTS $SOF_APLAY_OPTS $*"
+        # shellcheck disable=SC2086
+        aplay $SOF_ALSA_OPTS $SOF_APLAY_OPTS "$@"
+    else
+        printf '%s' "Unknown alsa tool: $SOF_ALSA_TOOL "
+    fi
 }
+
 arecord_opts()
 {
-    dlogc "arecord $SOF_ALSA_OPTS $SOF_ARECORD_OPTS $*"
-    # shellcheck disable=SC2086
-    arecord $SOF_ALSA_OPTS $SOF_ARECORD_OPTS "$@"
+
+    if [[ "$SOF_ALSA_TOOL" = "tinyalsa" ]]; then
+        dlogc "tinycap $SOF_ALSA_OPTS $SOF_ARECORD_OPTS $*"
+        # shellcheck disable=SC2154
+        extract_format_number "$fmt_elem"
+        tinycap "$SOF_ALSA_OPTS" "$SOF_ARECORD_OPTS" "$file" -D "$card_nr" -d "$dev_nr" -c "$channel" -t "$duration" -r "$rate" -b "$format"
+    elif [[ "$SOF_ALSA_TOOL" = "alsa" ]]; then
+        dlogc "arecord $SOF_ALSA_OPTS $SOF_ARECORD_OPTS $*"
+        # shellcheck disable=SC2086
+        arecord $SOF_ALSA_OPTS $SOF_ARECORD_OPTS "$@"
+    else
+        printf '%s' "Unknown alsa tool: $SOF_ALSA_TOOL "
+    fi
 }
 
 die()
@@ -952,7 +1020,7 @@ is_ipc4()
 logger_disabled()
 {
     # Disable logging when available...
-    if [ ${OPT_VAL['s']} -eq 0 ]; then
+    if [ "${OPT_VAL['s']}" -eq 0 ]; then
         return 0
     fi
 
@@ -1063,15 +1131,31 @@ set_alsa_settings()
 reset_sof_volume()
 {
     # set all PGA* volume to 0dB
-    amixer -Dhw:0 scontrols | sed -e "s/^.*'\(.*\)'.*/\1/" |grep -E 'PGA|gain' |
-    while read -r mixer_name
-    do
-        if is_ipc4; then
-            amixer -Dhw:0 -- sset "$mixer_name" 100%
-        else
-            amixer -Dhw:0 -- sset "$mixer_name" 0dB
-        fi
-    done
+    if [[ "$SOF_ALSA_TOOL" = "alsa" ]]; then
+        amixer -Dhw:0 scontrols | sed -e "s/^.*'\(.*\)'.*/\1/" |grep -E 'PGA|gain' |
+
+        while read -r mixer_name
+        do
+            if is_ipc4; then
+                amixer -Dhw:0 -- sset "$mixer_name" 100%
+            else
+               amixer -Dhw:0 -- sset "$mixer_name" 0dB
+            fi
+        done
+    elif [[ "$SOF_ALSA_TOOL" = "tinyalsa" ]]; then
+        tinymix -D0 controls | sed -e "s/^.*'\(.*\)'.*/\1/" |grep -E 'PGA|gain' |
+
+        while read -r mixer_name
+        do
+            if is_ipc4; then
+                tinymix -D0 set "$mixer_name" 100%
+            else
+                tinymix -D0 set "$mixer_name" 0dB
+            fi
+        done
+    else
+         echo "Unknown alsa tool $SOF_ALSA_TOOL"
+    fi
 }
 
 DO_PERF_ANALYSIS=0