rename files to snake_case

server/encoder/encoder.hpp

@@ -0,0 +1,100 @@
+/***
+    This file is part of snapcast
+    Copyright (C) 2014-2019  Johannes Pohl
+
+    This program 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.
+
+    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifndef ENCODER_H
+#define ENCODER_H
+
+#include <memory>
+#include <string>
+
+#include "common/sample_format.hpp"
+#include "message/codecHeader.h"
+#include "message/pcmChunk.h"
+
+
+class Encoder;
+
+/// Callback interface for users of Encoder
+/**
+ * Users of Encoder should implement this to get the encoded PCM data
+ */
+class EncoderListener
+{
+public:
+    virtual void onChunkEncoded(const Encoder* encoder, msg::PcmChunk* chunk, double duration) = 0;
+};
+
+
+
+/// Abstract Encoder class
+/**
+ * Stream encoder. PCM chunks are fed into the encoder.
+ * As soon as a frame is encoded, the encoded data is passed to the EncoderListener
+ */
+class Encoder
+{
+public:
+    /// ctor. Codec options (E.g. compression level) are passed as string and are codec dependend
+    Encoder(const std::string& codecOptions = "") : headerChunk_(nullptr), codecOptions_(codecOptions)
+    {
+    }
+
+    virtual ~Encoder() = default;
+
+    /// The listener will receive the encoded stream
+    virtual void init(EncoderListener* listener, const SampleFormat& format)
+    {
+        if (codecOptions_ == "")
+            codecOptions_ = getDefaultOptions();
+        listener_ = listener;
+        sampleFormat_ = format;
+        initEncoder();
+    }
+
+    /// Here the work is done. Encoded data is passed to the EncoderListener.
+    virtual void encode(const msg::PcmChunk* chunk) = 0;
+
+    virtual std::string name() const = 0;
+
+    virtual std::string getAvailableOptions() const
+    {
+        return "No codec options supported";
+    }
+
+    virtual std::string getDefaultOptions() const
+    {
+        return "";
+    }
+
+    /// Header information needed to decode the data
+    virtual std::shared_ptr<msg::CodecHeader> getHeader() const
+    {
+        return headerChunk_;
+    }
+
+protected:
+    virtual void initEncoder() = 0;
+
+    SampleFormat sampleFormat_;
+    std::shared_ptr<msg::CodecHeader> headerChunk_;
+    EncoderListener* listener_;
+    std::string codecOptions_;
+};
+
+
+#endif