Changeset 70972 in vbox for trunk/src/VBox/Devices

Timestamp:

Feb 12, 2018 12:47:16 PM (7 years ago)

Author:

vboxsync

Message:

Audio/DrvAudioCommon.cpp: Implemented DrvAudioHlpMsToBytes().

Location:

trunk/src/VBox/Devices/Audio

Files:

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

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

@@ -154 +154 @@
 uint32_t DrvAudioHlpCalcBitrate(uint8_t cBits, uint32_t uHz, uint8_t cChannels);
 uint32_t DrvAudioHlpCalcBitrate(const PPDMAUDIOPCMPROPS pProps);
+uint32_t DrvAudioHlpMsToBytes(const PPDMAUDIOPCMPROPS pProps, uint32_t uMs);
 bool DrvAudioHlpPCMPropsAreEqual(const PPDMAUDIOPCMPROPS pPCMProps1, const PPDMAUDIOPCMPROPS pPCMProps2);
 bool DrvAudioHlpPCMPropsAreEqual(const PPDMAUDIOPCMPROPS pPCMProps, const PPDMAUDIOSTREAMCFG pCfg);

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

@@ -1028 +1028 @@
 {
     return DrvAudioHlpCalcBitrate(pProps->cBits, pProps->uHz, pProps->cChannels);
+}
+
+/**
+ * Returns the amount of bytes for a given time (in ms) and PCM properties.
+ *
+ * @return  uint32_t            Calculated amount of bytes.
+ * @param   pProps              PCM properties to calculate amount of bytes for.
+ * @param   uMs                 Time (in ms) to calculate amount of bytes for.
+ */
+uint32_t DrvAudioHlpMsToBytes(const PPDMAUDIOPCMPROPS pProps, uint32_t uMs)
+{
+    AssertPtrReturn(pProps, 0);
+
+    if (!uMs)
+        return 0;
+
+    return float(((pProps->cBits / 8) * pProps->cChannels * pProps->uHz) / 1000) * uMs;
 }