1 files changed, 136 insertions, 0 deletions
diff --git a/src/VBox/Devices/Audio/AudioHlp.h b/src/VBox/Devices/Audio/AudioHlp.h
new file mode 100644
index 00000000..73a37b57
--- /dev/null
+++ b/src/VBox/Devices/Audio/AudioHlp.h
@@ -0,0 +1,136 @@
+/* $Id: AudioHlp.h $ */
+/** @file
+ * Audio helper routines.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#ifndef VBOX_INCLUDED_SRC_Audio_AudioHlp_h
+#define VBOX_INCLUDED_SRC_Audio_AudioHlp_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <limits.h>
+
+#include <iprt/circbuf.h>
+#include <iprt/critsect.h>
+#include <iprt/file.h>
+#include <iprt/path.h>
+
+#include <VBox/vmm/pdmaudioifs.h>
+
+/** @name Audio calculation helper methods.
+ * @{ */
+uint32_t AudioHlpCalcBitrate(uint8_t cBits, uint32_t uHz, uint8_t cChannels);
+/** @} */
+
+/** @name Audio PCM properties helper methods.
+ * @{ */
+bool     AudioHlpPcmPropsAreValidAndSupported(PCPDMAUDIOPCMPROPS pProps);
+/** @}  */
+
+/** @name Audio configuration helper methods.
+ * @{ */
+bool    AudioHlpStreamCfgIsValid(PCPDMAUDIOSTREAMCFG pCfg);
+/** @}  */
+
+
+/** @name AUDIOHLPFILE_FLAGS_XXX
+ * @{ */
+/** No flags defined. */
+#define AUDIOHLPFILE_FLAGS_NONE             UINT32_C(0)
+/** Keep the audio file even if it contains no audio data. */
+#define AUDIOHLPFILE_FLAGS_KEEP_IF_EMPTY    RT_BIT_32(0)
+/** Audio file flag validation mask. */
+#define AUDIOHLPFILE_FLAGS_VALID_MASK       UINT32_C(0x1)
+/** @} */
+
+/** Audio file default open flags. */
+#define AUDIOHLPFILE_DEFAULT_OPEN_FLAGS (RTFILE_O_OPEN_CREATE | RTFILE_O_APPEND | RTFILE_O_WRITE | RTFILE_O_DENY_WRITE)
+
+/**
+ * Audio file types.
+ */
+typedef enum AUDIOHLPFILETYPE
+{
+    /** The customary invalid zero value. */
+    AUDIOHLPFILETYPE_INVALID = 0,
+    /** Raw (PCM) file. */
+    AUDIOHLPFILETYPE_RAW,
+    /** Wave (.WAV) file. */
+    AUDIOHLPFILETYPE_WAV,
+    /** Hack to blow the type up to 32-bit. */
+    AUDIOHLPFILETYPE_32BIT_HACK = 0x7fffffff
+} AUDIOHLPFILETYPE;
+
+/** @name AUDIOHLPFILENAME_FLAGS_XXX
+ * @{ */
+/** No flags defined. */
+#define AUDIOHLPFILENAME_FLAGS_NONE         UINT32_C(0)
+/** Adds an ISO timestamp to the file name. */
+#define AUDIOHLPFILENAME_FLAGS_TS           RT_BIT_32(0)
+/** Valid flag mask. */
+#define AUDIOHLPFILENAME_FLAGS_VALID_MASK   AUDIOHLPFILENAME_FLAGS_TS
+/** @} */
+
+/**
+ * Audio file handle.
+ */
+typedef struct AUDIOHLPFILE
+{
+    /** Type of the audio file. */
+    AUDIOHLPFILETYPE    enmType;
+    /** Audio file flags, AUDIOHLPFILE_FLAGS_XXX. */
+    uint32_t            fFlags;
+    /** Amount of wave data written. */
+    uint64_t            cbWaveData;
+    /** Actual file handle. */
+    RTFILE              hFile;
+    /** File name and path. */
+    RT_FLEXIBLE_ARRAY_EXTENSION
+    char                szName[RT_FLEXIBLE_ARRAY];
+} AUDIOHLPFILE;
+/** Pointer to an audio file handle. */
+typedef AUDIOHLPFILE *PAUDIOHLPFILE;
+
+/** @name Audio file methods.
+ * @{ */
+int     AudioHlpFileCreateAndOpen(PAUDIOHLPFILE *ppFile, const char *pszDir, const char *pszName,
+                                  uint32_t iInstance, PCPDMAUDIOPCMPROPS pProps);
+int     AudioHlpFileCreateAndOpenEx(PAUDIOHLPFILE *ppFile, AUDIOHLPFILETYPE enmType, const char *pszDir,
+                                    uint32_t iInstance, uint32_t fFilename, uint32_t fCreate,
+                                    PCPDMAUDIOPCMPROPS pProps, uint64_t fOpen, const char *pszName, ...);
+int     AudioHlpFileCreateF(PAUDIOHLPFILE *ppFile, uint32_t fFlags, AUDIOHLPFILETYPE enmType,
+                            const char *pszPath, uint32_t fFilename, uint32_t uInstance, const char *pszFileFmt, ...);
+
+void    AudioHlpFileDestroy(PAUDIOHLPFILE pFile);
+int     AudioHlpFileOpen(PAUDIOHLPFILE pFile, uint64_t fOpen, PCPDMAUDIOPCMPROPS pProps);
+int     AudioHlpFileClose(PAUDIOHLPFILE pFile);
+int     AudioHlpFileDelete(PAUDIOHLPFILE pFile);
+bool    AudioHlpFileIsOpen(PAUDIOHLPFILE pFile);
+int     AudioHlpFileWrite(PAUDIOHLPFILE pFile, const void *pvBuf, size_t cbBuf);
+/** @}  */
+
+#endif /* !VBOX_INCLUDED_SRC_Audio_AudioHlp_h */
+