HeaderParserAAC.h

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#pragma once
#include "AudioTools/AudioCodecs/CodecADTS.h"
#include "AudioTools/CoreAudio/AudioBasic/StrView.h"
 
namespace audio_tools {
 
class HeaderParserAAC {
 public:
  bool isValid(const uint8_t* data, int len) {
    if (len < 7) return false;
    parser.begin();
    // regular validation
    if (!parser.parse((uint8_t*)data)) return false;
    // check if we have a valid 2nd frame
    if (len > getFrameLength()) {
      int pos = findSyncWord(data, len, getFrameLength());
      if (pos == -1) return false;
    }
    return true;
  }
 
  int getSampleRate() { return parser.getSampleRate(); }
 
  uint8_t getChannels() { return parser.data().channel_cfg; }
 
  int getFrameLength() { return parser.getFrameLength(); }
 
  int findSyncWord(const uint8_t* buf, int nBytes, int start = 0) {
    return parser.findSyncWord(buf, nBytes, start);
  }
 
  ADTSParser::ADTSHeader getHeader() { return parser.data(); }
 
 protected:
  ADTSParser parser;
};
 
}  // namespace audio_tools