import esp audio lib

2021-08-27 16:42:43 +02:00
parent 489174fdc8
commit 3d437de0e6
567 changed files with 267532 additions and 38 deletions
--- a/FW/leo_muziekdoos_sam51/lib/ESP8266Audio/src/AudioOutputMixer.h
+++ b/FW/leo_muziekdoos_sam51/lib/ESP8266Audio/src/AudioOutputMixer.h
@@ -0,0 +1,88 @@
+/*
+  AudioOutputMixer
+  Simple mixer which can combine multiple inputs to a single output stream
+  
+  Copyright (C) 2017  Earle F. Philhower, III
+
+  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 _AUDIOOUTPUTMIXER_H
+#define _AUDIOOUTPUTMIXER_H
+
+#include "AudioOutput.h"
+
+class AudioOutputMixer;
+
+
+// The output stub exported by the mixer for use by the generator
+class AudioOutputMixerStub : public AudioOutput
+{
+  public:
+    AudioOutputMixerStub(AudioOutputMixer *sink, int id);
+    virtual ~AudioOutputMixerStub() override;
+    virtual bool SetRate(int hz) override;
+    virtual bool SetBitsPerSample(int bits) override;
+    virtual bool SetChannels(int channels) override;
+    virtual bool begin() override;
+    virtual bool ConsumeSample(int16_t sample[2]) override;
+    virtual bool stop() override;
+
+  protected:
+    AudioOutputMixer *parent;
+    int id;
+};
+
+// Single mixer object per output
+class AudioOutputMixer : public AudioOutput
+{
+  public:
+    AudioOutputMixer(int samples, AudioOutput *sink);
+    virtual ~AudioOutputMixer() override;
+    virtual bool SetRate(int hz) override;
+    virtual bool SetBitsPerSample(int bits) override;
+    virtual bool SetChannels(int channels) override;
+    virtual bool begin() override;
+    virtual bool ConsumeSample(int16_t sample[2]) override;
+    virtual bool stop() override;
+    virtual bool loop() override; // Send all existing samples we can to I2S
+
+    AudioOutputMixerStub *NewInput(); // Get a new stub to pass to a generator
+
+  // Stub called functions
+  friend class AudioOutputMixerStub;
+  private:
+    void RemoveInput(int id);
+    bool SetRate(int hz, int id);
+    bool SetBitsPerSample(int bits, int id);
+    bool SetChannels(int channels, int id);
+    bool begin(int id);
+    bool ConsumeSample(int16_t sample[2], int id);
+    bool stop(int id);
+
+  protected:
+    enum { maxStubs = 8 };
+    AudioOutput *sink;
+    bool sinkStarted;
+    int16_t buffSize;
+    int32_t *leftAccum;
+    int32_t *rightAccum;
+    bool stubAllocated[maxStubs];
+    bool stubRunning[maxStubs];
+    int16_t writePtr[maxStubs]; // Array of pointers for allocated stubs
+    int16_t readPtr;
+};
+
+#endif
+