From 66bec923f80f6693f9ce17f26e3a9593d24cb5db Mon Sep 17 00:00:00 2001
From: Erik Norvell <erik.norvell@ericsson.com>
Date: Thu, 14 Dec 2023 13:21:06 +0100
Subject: [PATCH] Added MLD tool

---
 scripts/parse_mld.py                 |  29 +++++++++++++++++++++
 scripts/pyaudio3dtools/audioarray.py |  36 ++++++++++++++++++++++++++-
 scripts/tools/Linux/mld              | Bin 0 -> 22744 bytes
 scripts/tools/Win32/mld.exe          |   3 +++
 tests/cmp_pcm.py                     |  10 ++++++--
 tests/conftest.py                    |  14 +++++++++++
 6 files changed, 89 insertions(+), 3 deletions(-)
 create mode 100644 scripts/parse_mld.py
 create mode 100644 scripts/tools/Linux/mld
 create mode 100644 scripts/tools/Win32/mld.exe

diff --git a/scripts/parse_mld.py b/scripts/parse_mld.py
new file mode 100644
index 0000000000..2a60e176e3
--- /dev/null
+++ b/scripts/parse_mld.py
@@ -0,0 +1,29 @@
+#!/usr/bin/python3
+
+import argparse
+import re
+
+
+# Main routine
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description='Parse HTML report to extract MLD values')
+    parser.add_argument('html_report',type=str,help='HTML report input file, e.g. report.html')
+    parser.add_argument('csv_file',type=str,help='Output CSV file, e.g. output.csv')
+    args = parser.parse_args()
+    html_report = args.html_report
+    csv_file    = args.csv_file
+    
+    mld = {}
+    
+    with open(html_report,'r') as infile:
+        for line in infile.readlines():
+            if "col-name" in line: 
+                test_name = re.search('\[(.*)\]', line).group(1)
+                mld[test_name] = 0.0
+            if "MLD" in line:
+                mld_val = float(line.split()[1])
+                mld[test_name] = mld_val
+                
+    with open(csv_file,'w') as outfile:
+        for test_name in mld:
+            outfile.write(test_name + ';' + str(mld[test_name])+'\n')
\ No newline at end of file
diff --git a/scripts/pyaudio3dtools/audioarray.py b/scripts/pyaudio3dtools/audioarray.py
index 740c40c3c6..280b7e9aa4 100644
--- a/scripts/pyaudio3dtools/audioarray.py
+++ b/scripts/pyaudio3dtools/audioarray.py
@@ -37,6 +37,11 @@ from typing import Callable, Iterable, Optional, Tuple
 import numpy as np
 import multiprocessing as mp
 import scipy.signal as sig
+import scipy.io.wavfile as wavfile
+import subprocess
+import platform
+import tempfile
+from pathlib import Path
 
 main_logger = logging.getLogger("__main__")
 logger = main_logger.getChild(__name__)
@@ -221,7 +226,7 @@ def cut(x: np.ndarray, limits: Tuple[int, int]) -> np.ndarray:
     return y
 
 
-def compare(ref: np.ndarray, test: np.ndarray, fs: int, per_frame: bool = True) -> dict:
+def compare(ref: np.ndarray, test: np.ndarray, fs: int, per_frame: bool = True, get_mld: bool = False) -> dict:
     """Compare two audio arrays
 
     Parameters
@@ -232,6 +237,10 @@ def compare(ref: np.ndarray, test: np.ndarray, fs: int, per_frame: bool = True)
         Input test array
     fs: int
         Input sampling rate in Hz
+    per_frame: bool
+        Compute difference per frame (default True)
+    get_mld: bool
+        Run MLD tool if there is a difference between the signals (default False)
 
     Returns
     -------
@@ -251,6 +260,7 @@ def compare(ref: np.ndarray, test: np.ndarray, fs: int, per_frame: bool = True)
         "first_diff_pos_sample": -1,
         "first_diff_pos_channel": -1,
         "first_diff_pos_frame": -1,
+        "MLD": 0 if get_mld else None,
     }
     if per_frame:
         result["max_abs_diff_pos_frame"] = 0
@@ -303,6 +313,30 @@ def compare(ref: np.ndarray, test: np.ndarray, fs: int, per_frame: bool = True)
             result["nframes_diff"] = nframes_diff
             result["nframes_diff_percentage"] = nframes_diff_percentage
 
+        if get_mld:
+            
+            mld_max = 0
+            toolsdir = Path(__file__).parent.parent.joinpath("tools")
+            if platform.system() == "Windows":
+                mld = toolsdir.joinpath( "Win32").joinpath("mld.exe" )
+            elif platform.system() in ["Linux", "Darwin"]:
+                mld = toolsdir.joinpath(platform.system()).joinpath( "mld" )
+            else:
+                assert False, f"MLD tool not available for {platform.system()}"
+
+            with tempfile.TemporaryDirectory() as tmpdir:
+                for i in range(nchannels):
+                    tmpfile_ref = Path(tmpdir).joinpath(f"ref_ch{i+1}.wav")
+                    tmpfile_test = Path(tmpdir).joinpath(f"test_ch{i+1}.wav")
+                    r48 = resample(ref[:,i], fs, 48000);
+                    t48 = resample(test[:,i], fs, 48000);
+                    wavfile.write(str(tmpfile_ref), 48000, r48)
+                    wavfile.write(str(tmpfile_test), 48000, t48)
+                    out = subprocess.check_output([mld,tmpfile_ref,tmpfile_test])
+                    mld_max = max(mld_max, float(out.split()[3]))
+
+            result["MLD"] = mld_max
+
     return result
 
 
diff --git a/scripts/tools/Linux/mld b/scripts/tools/Linux/mld
new file mode 100644
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diff --git a/scripts/tools/Win32/mld.exe b/scripts/tools/Win32/mld.exe
new file mode 100644
index 0000000000..88146ad69c
--- /dev/null
+++ b/scripts/tools/Win32/mld.exe
@@ -0,0 +1,3 @@
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diff --git a/tests/cmp_pcm.py b/tests/cmp_pcm.py
index a54aa2cf11..817ac9c502 100755
--- a/tests/cmp_pcm.py
+++ b/tests/cmp_pcm.py
@@ -12,7 +12,7 @@ import pyivastest
 import numpy as np
 
 
-def cmp_pcm(file1, file2, out_config, fs) -> (int, str):
+def cmp_pcm(file1, file2, out_config, fs, get_mld = False) -> (int, str):
     """
     Compare 2 PCM files for bitexactness
     """
@@ -34,6 +34,8 @@ def cmp_pcm(file1, file2, out_config, fs) -> (int, str):
     s1, _ = pyaudio3dtools.audiofile.readfile(file1, nchannels, fs, outdtype=np.int16)
     s2, _ = pyaudio3dtools.audiofile.readfile(file2, nchannels, fs, outdtype=np.int16)
 
+    nchannels = s1.shape[1] # In case of wav input, override the nchannels with the one from the wav header
+
     if s1.shape != s2.shape:
         print(
             f"file size in samples: file 1 = {s1.shape[0]},",
@@ -41,7 +43,7 @@ def cmp_pcm(file1, file2, out_config, fs) -> (int, str):
         )
         return 1, "FAIL: File lengths differ"
 
-    cmp_result = pyaudio3dtools.audioarray.compare(s1, s2, fs, per_frame=False)
+    cmp_result = pyaudio3dtools.audioarray.compare(s1, s2, fs, per_frame=False, get_mld=get_mld)
 
     if cmp_result["bitexact"]:
         return 0, "SUCCESS: Files are bitexact"
@@ -50,6 +52,9 @@ def cmp_pcm(file1, file2, out_config, fs) -> (int, str):
         first_msg = f"First diff found at sample num {cmp_result['first_diff_pos_sample']} in channel {cmp_result['first_diff_pos_channel']}, frame {cmp_result['first_diff_pos_frame']} (assuming {nchannels} channels, {fs} sampling rate)"
         print(diff_msg)
         print(first_msg)
+        if get_mld:
+            mld_msg = f"MLD: {cmp_result['MLD']}"
+            print(mld_msg)        
         return 1, "FAIL: Files have different content"
 
 
@@ -65,6 +70,7 @@ if __name__ == "__main__":
         choices=pyivastest.constants.OC_TO_NCHANNELS.keys(),
     )
     parser.add_argument("-s", "--sampling_rate", type=int, default=48000, dest="fs")
+    parser.add_argument("--get_mld", action="store_true")
     args = parser.parse_args()
 
     result, msg = cmp_pcm(**vars(args))
diff --git a/tests/conftest.py b/tests/conftest.py
index 46cd0d3a61..4b38ef776a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -152,6 +152,12 @@ def pytest_addoption(parser):
         help="Timeout in seconds for each individual testcase. Default is no timeout.",
     )
 
+    parser.addoption(
+        "--mld",
+        action="store_true",
+        help="Run the MLD tool instead of just comparing for bitexactness",
+    )
+
 
 @pytest.fixture(scope="session", autouse=True)
 def update_ref(request):
@@ -164,6 +170,14 @@ def update_ref(request):
     return int(request.config.getoption("--update_ref"))
 
 
+@pytest.fixture(scope="session", autouse=True)
+def get_mld(request):
+    """
+    Return indication to run the MLD tool during ref/dut comparison.
+    """
+    return request.config.option.mld
+
+
 @pytest.fixture(scope="session")
 def keep_files(request) -> bool:
     """
-- 
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