Add function to prepend another AudioFrame to an AudioFrame

1158114251 · Oct 13, 2017 · b4b21a8 · b4b21a8
1 parent dff0967
commit b4b21a8
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Showing 2 changed files with 19 additions and 0 deletions.
diff --git a/src/AudioFrame.cpp b/src/AudioFrame.cpp
@@ -180,6 +180,24 @@ AudioFrame AudioFrame::mid(int pos, int len) const
     return f;
 }
 
+void AudioFrame::prepend(AudioFrame &other)
+{
+    Q_D(AudioFrame);
+
+    if (d->format != other.format()) {
+        qWarning() << "To prepend a frame it must have the same audio format";
+        return;
+    }
+
+    d->data.prepend(other.data());
+    d->samples_per_ch += other.samplesPerChannel();
+    d->timestamp = other.timestamp();
+
+    for (int i = 0; i < planeCount(); i++) {
+        d->line_sizes[i] += other.bytesPerLine(i);
+    }
+}
+
 AudioFormat AudioFrame::format() const
 {
     return d_func()->format;

diff --git a/src/QtAV/AudioFrame.h b/src/QtAV/AudioFrame.h
@@ -58,6 +58,7 @@ class Q_AV_EXPORT AudioFrame : public Frame
      */
     AudioFrame clone() const;
     AudioFrame mid(int pos, int len = -1) const;
+    void prepend(AudioFrame &other);
     AudioFormat format() const;
     void setSamplesPerChannel(int samples);
     // may change after resampling