Bell catchup

components/spotify/cspot/bell/main/audio-containers/include/ADTSContainer.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <stdint.h>  // for uint32_t
+#include <cstddef>   // for byte, size_t
+#include <istream>   // for istream
+#include <vector>    // for vector
+
+#include "AudioContainer.h"  // for AudioContainer
+#include "CodecType.h"       // for AudioCodec, AudioCodec::AAC
+
+namespace bell {
+class ADTSContainer : public AudioContainer {
+ public:
+  ~ADTSContainer(){};
+  ADTSContainer(std::istream& istr, const std::byte* headingBytes = nullptr);
+
+  std::byte* readSample(uint32_t& len) override;
+  bool resyncADTS();
+  void parseSetupData() override;
+  void consumeBytes(uint32_t len) override;
+
+  bell::AudioCodec getCodec() override { return bell::AudioCodec::AAC; }
+
+ private:
+  static constexpr auto AAC_MAX_FRAME_SIZE = 2100;
+  static constexpr auto BUFFER_SIZE = 1024 * 10;
+
+  std::vector<std::byte> buffer = std::vector<std::byte>(BUFFER_SIZE);
+
+  size_t bytesInBuffer = 0;
+  size_t dataOffset = 0;
+  bool protectionAbsent = false;
+
+  bool fillBuffer();
+};
+}  // namespace bell