Changeset 73207 in vbox for trunk/src/VBox/Devices

Timestamp:

Jul 18, 2018 2:56:36 PM (6 years ago)

Author:

vboxsync

Message:

Audio/DrvAudio: Implemented DrvAudioHlpBytesToFrames(), DrvAudioHlpFramesToBytes() and DrvAudioHlpPCMPropsBytesPerFrame().

Location:

trunk/src/VBox/Devices/Audio

Files:

• DrvAudio.h (modified) (2 diffs)
• DrvAudioCommon.cpp (modified) (3 diffs)

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 DrvAudioHlpBytesToFrames(const PPDMAUDIOPCMPROPS pProps, uint32_t cbBytes);
 uint64_t DrvAudioHlpBytesToMs(const PPDMAUDIOPCMPROPS pProps, size_t cbBytes);
+uint32_t DrvAudioHlpFramesToBytes(const PPDMAUDIOPCMPROPS pProps, uint32_t cFrames);
 float DrvAudioHlpFramesToMs(const PPDMAUDIOPCMPROPS pProps, size_t cFrames);
 uint32_t DrvAudioHlpMsToBytes(const PPDMAUDIOPCMPROPS pProps, uint32_t uMs);
@@ -161 +163 @@
 bool DrvAudioHlpPCMPropsAreEqual(const PPDMAUDIOPCMPROPS pPCMProps, const PPDMAUDIOSTREAMCFG pCfg);
 bool DrvAudioHlpPCMPropsAreValid(const PPDMAUDIOPCMPROPS pProps);
+uint32_t DrvAudioHlpPCMPropsBytesPerFrame(const PPDMAUDIOPCMPROPS pProps);
 void DrvAudioHlpPCMPropsPrint(const PPDMAUDIOPCMPROPS pProps);
 int DrvAudioHlpPCMPropsToStreamCfg(const PPDMAUDIOPCMPROPS pPCMProps, PPDMAUDIOSTREAMCFG pCfg);

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

@@ -869 +869 @@
 
 /**
+ * Returns the bytes per frame for given PCM properties.
+ *
+ * @return Bytes per (audio) frame.
+ * @param  pProps               PCM properties to retrieve bytes per frame for.
+ */
+uint32_t DrvAudioHlpPCMPropsBytesPerFrame(const PPDMAUDIOPCMPROPS pProps)
+{
+    return (pProps->cBits / 8) * pProps->cChannels;
+}
+
+/**
  * Prints PCM properties to the debug log.
  *
@@ -1053 +1064 @@
 
 /**
+ * Returns the number of audio frames for a given amount of bytes.
+ *
+ * @return Calculated audio frames for given bytes.
+ * @param  pProps               PCM properties to calulate frames for.
+ * @param  cbBytes              Bytes to convert to audio frames.
+ */
+uint32_t DrvAudioHlpBytesToFrames(const PPDMAUDIOPCMPROPS pProps, uint32_t cbBytes)
+{
+    AssertPtrReturn(pProps, 0);
+
+    return cbBytes / ((pProps->cBits / 8) * pProps->cChannels);
+}
+
+/**
  * Returns the time (in ms) for given byte amount and PCM properties.
  *
@@ -1072 +1097 @@
 
     return cbBytes / dbBytesPerMs;
+}
+
+/**
+ * Returns the bytes for a given audio frames amount and PCM properties.
+ *
+ * @return Calculated bytes for given audio frames.
+ * @param  pProps               PCM properties to calculate bytes for.
+ * @param  cFrames              Amount of audio frames to calculate bytes for.
+ */
+uint32_t DrvAudioHlpFramesToBytes(const PPDMAUDIOPCMPROPS pProps, uint32_t cFrames)
+{
+    AssertPtrReturn(pProps, 0);
+
+    if (!cFrames)
+        return 0;
+
+    return cFrames * ((pProps->cBits / 2) * pProps->cChannels);
 }