From a90a66802f4e5ef8b786271eae04d7b4957d6cbf Mon Sep 17 00:00:00 2001
From: emeric <emeric.poupon@laposte.net>
Date: Wed, 28 Jan 2026 22:50:32 +0100
Subject: [PATCH] Added getter to get output pcm params

---
 src/libs/audio/impl/PcmTypes.cpp             | 41 ++++++++++++++++++++
 src/libs/audio/impl/ffmpeg/PcmDecoder.cpp    |  5 +++
 src/libs/audio/impl/ffmpeg/PcmDecoder.hpp    |  2 +
 src/libs/audio/include/audio/IPcmDecoder.hpp |  2 +
 src/libs/audio/include/audio/PcmTypes.hpp    |  2 +
 5 files changed, 52 insertions(+)
 create mode 100644 src/libs/audio/impl/PcmTypes.cpp

diff --git a/src/libs/audio/impl/PcmTypes.cpp b/src/libs/audio/impl/PcmTypes.cpp
new file mode 100644
index 00000000..e0379efc
--- /dev/null
+++ b/src/libs/audio/impl/PcmTypes.cpp
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2026 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "audio/PcmTypes.hpp"
+#include "audio/Exception.hpp"
+
+namespace lms::audio
+{
+    std::size_t getSampleSize(PcmSampleType type)
+    {
+        switch (type)
+        {
+        case PcmSampleType::Signed16:
+            return 2;
+        case PcmSampleType::Signed32:
+        case PcmSampleType::Float32:
+            return 4;
+        case PcmSampleType::Float64:
+            return 8;
+        };
+
+        throw Exception{ "Unhandled sample type" };
+    }
+
+} // namespace lms::audio
\ No newline at end of file
diff --git a/src/libs/audio/impl/ffmpeg/PcmDecoder.cpp b/src/libs/audio/impl/ffmpeg/PcmDecoder.cpp
index 0fa8e312..32cd3b6a 100644
--- a/src/libs/audio/impl/ffmpeg/PcmDecoder.cpp
+++ b/src/libs/audio/impl/ffmpeg/PcmDecoder.cpp
@@ -167,6 +167,11 @@ namespace lms::audio::ffmpeg
 
     PcmDecoder::~PcmDecoder() = default;
 
+    const PcmParameters& PcmDecoder::getParameters() const
+    {
+        return _parameters;
+    }
+
     std::size_t PcmDecoder::readSamples(std::span<WritableBuffer> outputChannelBuffers)
     {
         if (_finished)
diff --git a/src/libs/audio/impl/ffmpeg/PcmDecoder.hpp b/src/libs/audio/impl/ffmpeg/PcmDecoder.hpp
index 2f90bae4..8ad1a1d4 100644
--- a/src/libs/audio/impl/ffmpeg/PcmDecoder.hpp
+++ b/src/libs/audio/impl/ffmpeg/PcmDecoder.hpp
@@ -35,6 +35,8 @@ namespace lms::audio::ffmpeg
         PcmDecoder& operator=(const PcmDecoder&) = delete;
 
     private:
+        const PcmParameters& getParameters() const;
+
         std::size_t readSamples(std::span<WritableBuffer> outputChannelBuffers) override;
         bool finished() const override;
 
diff --git a/src/libs/audio/include/audio/IPcmDecoder.hpp b/src/libs/audio/include/audio/IPcmDecoder.hpp
index 022ce23b..93e87521 100644
--- a/src/libs/audio/include/audio/IPcmDecoder.hpp
+++ b/src/libs/audio/include/audio/IPcmDecoder.hpp
@@ -35,6 +35,8 @@ namespace lms::audio
 
         using WritableBuffer = std::span<std::byte>;
 
+        virtual const PcmParameters& getParameters() const = 0;
+
         // Returns the number of samples written per channel. Returns 0 only once all remaining samples are drained.
         // Provide one buffer per channel if planar, or a single buffer containing all channels interleaved
         // Each buffer must be sized to hold an integer number of samples according to the requested sample type.
diff --git a/src/libs/audio/include/audio/PcmTypes.hpp b/src/libs/audio/include/audio/PcmTypes.hpp
index 3d60c6d6..90338db3 100644
--- a/src/libs/audio/include/audio/PcmTypes.hpp
+++ b/src/libs/audio/include/audio/PcmTypes.hpp
@@ -31,6 +31,8 @@ namespace lms::audio
         Float64,
     };
 
+    std::size_t getSampleSize(PcmSampleType type);
+
     struct PcmParameters
     {
         unsigned channelCount;