From 7102f830e01c3d4d695c0d36608cb09064e4aedc Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Mon, 20 May 2019 08:49:29 +0200
Subject: Move outputs to a separate file

---
 src/Outputs.h | 126 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 src/Outputs.h

(limited to 'src/Outputs.h')

diff --git a/src/Outputs.h b/src/Outputs.h
new file mode 100644
index 0000000..30b20c8
--- /dev/null
+++ b/src/Outputs.h
@@ -0,0 +1,126 @@
+/* ------------------------------------------------------------------
+ * Copyright (C) 2011 Martin Storsjo
+ * Copyright (C) 2019 Matthias P. Braendli
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ * -------------------------------------------------------------------
+ */
+
+#pragma once
+#include <vector>
+#include <deque>
+#include <cstdint>
+#include <cstddef>
+#include <cstdio>
+#include "common.h"
+#include "zmq.hpp"
+extern "C" {
+#include "encryption.h"
+}
+
+namespace Output {
+
+/*! \file Outputs.h
+ *
+ * Declaration of all outputs
+ */
+
+class Base {
+    public:
+        virtual ~Base() {};
+
+        /*! Write a buffer of encoded data to the output */
+        virtual bool write_frame(const uint8_t *buf, size_t len) = 0;
+
+        /*! Update peak audio level information */
+        virtual void update_audio_levels(
+                int16_t audiolevel_left, int16_t audiolevel_right);
+
+    protected:
+        int16_t m_audio_left = 0;
+        int16_t m_audio_right = 0;
+};
+
+class File : public Base {
+    public:
+        File(const char *filename);
+        File(FILE *file);
+        File(const File&) = delete;
+        File& operator=(const File&) = delete;
+        virtual ~File() override;
+
+        virtual bool write_frame(const uint8_t *buf, size_t len) override;
+
+    private:
+        FILE *m_fd = nullptr;
+};
+
+/*! This defines the on-wire representation of a ZMQ message header.
+ * It must be compatible with the definition in ODR-DabMux.
+ *
+ * The data follows right after this header */
+struct zmq_frame_header_t
+{
+    uint16_t version; // we support version=1 now
+    uint16_t encoder; // see ZMQ_ENCODER_XYZ
+
+    /* length of the 'data' field */
+    uint32_t datasize;
+
+    /* Audio level, peak, linear PCM */
+    int16_t audiolevel_left;
+    int16_t audiolevel_right;
+
+    /* Data follows this header */
+} __attribute__ ((packed));
+
+#define ZMQ_ENCODER_FDK 1
+#define ZMQ_ENCODER_TOOLAME 2
+
+#define ZMQ_HEADER_SIZE sizeof(struct zmq_frame_header_t)
+
+/* The expected frame size incl data of the given frame */
+#define ZMQ_FRAME_SIZE(f) (sizeof(struct zmq_frame_header_t) + f->datasize)
+
+#define ZMQ_FRAME_DATA(f) ( ((uint8_t*)f)+sizeof(struct zmq_frame_header_t) )
+
+
+class ZMQ: public Base {
+    public:
+        ZMQ();
+        ZMQ(const ZMQ&) = delete;
+        ZMQ& operator=(const ZMQ&) = delete;
+        virtual ~ZMQ() override;
+
+        void connect(const char *uri, const char *keyfile);
+        void set_encoder_type(encoder_selection_t& enc, int bitrate);
+
+        virtual bool write_frame(const uint8_t *buf, size_t len) override;
+
+    private:
+        virtual bool write_toolame(const uint8_t *buf, size_t len);
+        virtual bool send_frame(const uint8_t *buf, size_t len);
+
+        zmq::context_t m_ctx;
+        zmq::socket_t m_sock;
+
+        int m_bitrate = 0;
+        char m_secretkey[CURVE_KEYLEN+1];
+        encoder_selection_t m_encoder = encoder_selection_t::fdk_dabplus;
+        using vec_u8 = std::vector<uint8_t>;
+        vec_u8 m_framebuf;
+        std::deque<uint8_t> m_toolame_buffer;
+};
+
+}
-- 
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