PcmFormat.hpp

#ifndef ZAO_ENDPOINT_AUDIO_PCM_FORMAT_HPP_
#define ZAO_ENDPOINT_AUDIO_PCM_FORMAT_HPP_
 
#include <memory>
#include <string>
 
namespace zao {
namespace endpoint {
namespace audio {
 
class PcmFormat {
 public:
  PcmFormat() noexcept {}
 
  PcmFormat(int sampling_rate, unsigned channel_mask) noexcept {
    SetSamplingRate(sampling_rate);
    SetChannelMask(channel_mask);
  }
 
  int GetSamplingRate() const noexcept { return sampling_rate_; }
 
  void SetSamplingRate(int new_value) noexcept { sampling_rate_ = new_value; }
 
  enum ChannelBits : unsigned {
    kLeftChannel = (1u << 0),
    kRightChannel = (1u << 1),
    kStereo = kLeftChannel | kRightChannel,
  };
 
  unsigned GetChannelMask() const noexcept { return channel_mask_; }
 
  void SetChannelMask(unsigned new_value) noexcept {
    channel_mask_ = new_value;
  }
 
  int GetNumOfChannels() const noexcept {
    auto mask = channel_mask_;
    int num_of_channels = 0;
    while (mask) {
      if (mask & 1) {
        ++num_of_channels;
      }
      mask >>= 1;
    }
    return num_of_channels;
  }
 
  bool operator==(const PcmFormat& other) const noexcept {
    return sampling_rate_ == other.sampling_rate_ &&
           channel_mask_ == other.channel_mask_;
  }
 
  bool operator!=(const PcmFormat& other) const noexcept {
    return !(*this == other);
  }
 
 private:
  int sampling_rate_ = 0;
 
  unsigned channel_mask_ = 0u;
};
 
}  // namespace audio
}  // namespace endpoint
}  // namespace zao
 
#endif  // ZAO_ENDPOINT_AUDIO_PCM_FORMAT_HPP_