播放器新增支持音频:#945

player/SDLAudioDevice.h

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
+ *
+ * This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
+ *
+ * Use of this source code is governed by MIT license that can be found in the
+ * LICENSE file in the root of the source tree. All contributing project authors
+ * may be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef SDLAUDIOMIXER_SDLAUDIODEVICE_H_
+#define SDLAUDIOMIXER_SDLAUDIODEVICE_H_
+
+#include <mutex>
+#include <memory>
+#include <stdexcept>
+#include <unordered_set>
+
+#define DEFAULT_SAMPLERATE 48000
+#define DEFAULT_FORMAT AUDIO_S16
+#define DEFAULT_CHANNEL 2
+#define DEFAULT_SAMPLES 1024
+
+using namespace std;
+
+class AudioSRC;
+
+//该对象主要实现sdl混音与播放
+class SDLAudioDevice : public std::enable_shared_from_this<SDLAudioDevice>{
+public:
+    using Ptr = std::shared_ptr<SDLAudioDevice>;
+
+    ~SDLAudioDevice();
+    static SDLAudioDevice &Instance();
+
+    void addChannel(AudioSRC *chn);
+    void delChannel(AudioSRC *chn);
+
+private:
+    SDLAudioDevice();
+    void onReqPCM(char *stream, int len);
+
+private:
+    std::shared_ptr<char> _play_buf;
+    SDL_AudioSpec _audio_config;
+    recursive_mutex _channel_mtx;
+    unordered_set<AudioSRC *> _channels;
+};
+
+#endif /* SDLAUDIOMIXER_SDLAUDIODEVICE_H_ */