audiovisualwaveform: keep track of length

Useful to determine how long the visual waveform is.
2021-04-27 00:49:04 +10:00
parent 81cc665ff2
commit f2f5ab8739
2 changed files with 14 additions and 0 deletions
@@ -121,6 +121,9 @@ void AudioVisualWaveform::OverwriteSamples(SampleBufferPtr samples, int sample_r
                               input_start, input_length, start, current_mipmap->first.toDouble(),
                               current_mipmap->second);
  }
+
+  rational sample_length(samples->sample_count(), sample_rate);
+  length_ = qMax(length_, start + sample_length);
 }

 void AudioVisualWaveform::OverwriteSums(const AudioVisualWaveform &sums, const rational &dest, const rational& offset, const rational& length)
@@ -155,6 +158,8 @@ void AudioVisualWaveform::OverwriteSums(const AudioVisualWaveform &sums, const r
           reinterpret_cast<const char*>(their_arr.constData()) + their_start_index * sizeof(SamplePerChannel),
           copy_len * sizeof(SamplePerChannel));
  }
+
+  length_ = qMax(length_, dest + length);
 }

 void AudioVisualWaveform::Shift(const rational &from, const rational &to)
@@ -201,6 +206,8 @@ void AudioVisualWaveform::Shift(const rational &from, const rational &to)
      memset(reinterpret_cast<char*>(&data[from_index]), 0, distance * sizeof(SamplePerChannel));
    }
  }
+
+  length_ += (to-from);
 }

 AudioVisualWaveform::Sample AudioVisualWaveform::GetSummaryFromTime(const rational &start, const rational &length) const