Changeset 73379 in vbox for trunk/src/VBox/Devices

Timestamp:

Jul 27, 2018 9:03:35 AM (6 years ago)

Author:

vboxsync

Message:

Audio/DrvAudioCommon.cpp: Implemented DrvAudioHlpBytesAlign() and DrvAudioHlpBytesIsAligned().

Location:

trunk/src/VBox/Devices/Audio

Files:

• DrvAudio.h (modified) (1 diff)
• DrvAudioCommon.cpp (modified) (1 diff)

trunk/src/VBox/Devices/Audio/DrvAudio.h

@@ -184 +184 @@
 uint32_t DrvAudioHlpCalcBitrate(uint8_t cBits, uint32_t uHz, uint8_t cChannels);
 uint32_t DrvAudioHlpCalcBitrate(const PPDMAUDIOPCMPROPS pProps);
+uint32_t DrvAudioHlpBytesAlign(uint32_t cbSize, const PPDMAUDIOPCMPROPS pProps);
+bool     DrvAudioHlpBytesIsAligned(uint32_t cbSize, const PPDMAUDIOPCMPROPS pProps);
 uint32_t DrvAudioHlpBytesToFrames(const PPDMAUDIOPCMPROPS pProps, uint32_t cbBytes);
 uint64_t DrvAudioHlpBytesToMs(const PPDMAUDIOPCMPROPS pProps, uint32_t cbBytes);

trunk/src/VBox/Devices/Audio/DrvAudioCommon.cpp

@@ -1061 +1061 @@
 {
     return DrvAudioHlpCalcBitrate(pProps->cBits, pProps->uHz, pProps->cChannels);
+}
+
+/**
+ * Aligns the given byte amount to the given PCM properties and returns the aligned
+ * size.
+ *
+ * @return  Aligned size (in bytes).
+ * @param   cbSize              Size (in bytes) to align.
+ * @param   pProps              PCM properties to align size to.
+ */
+uint32_t DrvAudioHlpBytesAlign(uint32_t cbSize, const PPDMAUDIOPCMPROPS pProps)
+{
+    AssertPtrReturn(pProps, 0);
+
+    if (!cbSize)
+        return 0;
+
+    const uint32_t cbFrameSize = DrvAudioHlpPCMPropsBytesPerFrame(pProps);
+    return (cbSize / cbFrameSize) * cbFrameSize;
+}
+
+/**
+ * Returns if the the given size is properly aligned to the given PCM properties.
+ *
+ * @return  @c true if properly aligned, @c false if not.
+ * @param   cbSize              Size (in bytes) to check alignment for.
+ * @param   pProps              PCM properties to use for checking the alignment.
+ */
+bool DrvAudioHlpBytesIsAligned(uint32_t cbSize, const PPDMAUDIOPCMPROPS pProps)
+{
+    AssertPtrReturn(pProps, 0);
+
+    if (!cbSize)
+        return true;
+
+    return (cbSize % DrvAudioHlpPCMPropsBytesPerFrame(pProps) == 0);
 }