move to new cspot

components/spotify/cspot/bell/main/io/include/EncodedAudioStream.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "BellLogger.h"
+#include "ByteStream.h"
+#include "DecoderGlobals.h"
+#include "aacdec.h"
+#include "mp3dec.h"
+
+namespace bell {
+class EncodedAudioStream {
+ public:
+  EncodedAudioStream();
+  ~EncodedAudioStream();
+
+  // Codecs supported by this stream class
+  enum class AudioCodec { AAC, MP3, OGG, NONE };
+
+  void openWithStream(std::unique_ptr<bell::ByteStream> byteStream);
+  size_t decodeFrame(uint8_t* dst);
+  bool isReadable();
+
+ private:
+  std::shared_ptr<ByteStream> innerStream;
+  std::vector<uint8_t> inputBuffer;
+  std::vector<short> outputBuffer;
+  std::string TAG = "EncryptedAudioStream";
+
+  uint8_t* decodePtr = 0;
+  int bytesInBuffer = 0;
+  size_t offset = 0;
+
+  size_t decodedSampleRate = 44100;
+
+  AudioCodec codec = AudioCodec::NONE;
+
+  void guessDataFormat();
+
+  void readFully(uint8_t* dst, size_t nbytes);
+  bool vectorStartsWith(std::vector<uint8_t>&, std::vector<uint8_t>&);
+
+  std::vector<uint8_t> aacMagicBytes = {0xFF, 0xF1};
+  std::vector<uint8_t> aacMagicBytes4 = {0xFF, 0xF9};
+  std::vector<uint8_t> mp3MagicBytesUntagged = {0xFF, 0xFB};
+  std::vector<uint8_t> mp3MagicBytesIdc = {0x49, 0x44, 0x33};
+
+  AACFrameInfo aacFrameInfo;
+  MP3FrameInfo mp3FrameInfo;
+
+  size_t decodeFrameMp3(uint8_t* dst);
+  size_t decodeFrameAAC(uint8_t* dst);
+};
+}  // namespace bell