| 1 | /* $Id: AudioMixBuffer.h 57397 2015-08-17 15:13:40Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * VBox audio: Mixing buffer to convert audio samples to/from different
|
|---|
| 4 | * rates / formats.
|
|---|
| 5 | */
|
|---|
| 6 |
|
|---|
| 7 | /*
|
|---|
| 8 | * Copyright (C) 2014-2015 Oracle Corporation
|
|---|
| 9 | *
|
|---|
| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 11 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 12 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 13 | * General Public License (GPL) as published by the Free Software
|
|---|
| 14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 17 | */
|
|---|
| 18 |
|
|---|
| 19 | #ifndef AUDIO_MIXBUF_H
|
|---|
| 20 | #define AUDIO_MIXBUF_H
|
|---|
| 21 |
|
|---|
| 22 | #include <iprt/cdefs.h>
|
|---|
| 23 | #include <VBox/vmm/pdmaudioifs.h>
|
|---|
| 24 |
|
|---|
| 25 | /** Constructs 32 bit value for given frequency, number of channels, bits per sample and signed bit.
|
|---|
| 26 | * Note: This currently matches 1:1 the VRDE encoding -- this might change in the future, so better don't rely on this fact! */
|
|---|
| 27 | #define AUDMIXBUF_AUDIO_FMT_MAKE(freq, c, bps, s) ((((s) & 0x1) << 28) + (((bps) & 0xFF) << 20) + (((c) & 0xF) << 16) + ((freq) & 0xFFFF))
|
|---|
| 28 |
|
|---|
| 29 | /** Decodes frequency (Hz). */
|
|---|
| 30 | #define AUDMIXBUF_FMT_SAMPLE_FREQ(a) ((a) & 0xFFFF)
|
|---|
| 31 | /** Decodes number of channels. */
|
|---|
| 32 | #define AUDMIXBUF_FMT_CHANNELS(a) (((a) >> 16) & 0xF)
|
|---|
| 33 | /** Decodes signed bit. */
|
|---|
| 34 | #define AUDMIXBUF_FMT_SIGNED(a) (((a) >> 28) & 0x1)
|
|---|
| 35 | /** Decodes number of bits per sample. */
|
|---|
| 36 | #define AUDMIXBUF_FMT_BITS_PER_SAMPLE(a) (((a) >> 20) & 0xFF)
|
|---|
| 37 | /** Decodes number of bytes per sample. */
|
|---|
| 38 | #define AUDMIXBUF_FMT_BYTES_PER_SAMPLE(a) ((AUDMIXBUF_AUDIO_FMT_BITS_PER_SAMPLE(a) + 7) / 8)
|
|---|
| 39 |
|
|---|
| 40 | /** Converts samples to bytes. */
|
|---|
| 41 | #define AUDIOMIXBUF_S2B(pBuf, samples) ((samples) << (pBuf)->cShift)
|
|---|
| 42 | /** Converts samples to bytes, respecting the conversion ratio to
|
|---|
| 43 | * a linked buffer. */
|
|---|
| 44 | #define AUDIOMIXBUF_S2B_RATIO(pBuf, samples) ((((int64_t) samples << 32) / (pBuf)->iFreqRatio) << (pBuf)->cShift)
|
|---|
| 45 | /** Converts bytes to samples, *not* taking the conversion ratio
|
|---|
| 46 | * into account. */
|
|---|
| 47 | #define AUDIOMIXBUF_B2S(pBuf, cb) (cb >> (pBuf)->cShift)
|
|---|
| 48 | /** Converts number of samples according to the buffer's ratio. */
|
|---|
| 49 | #define AUDIOMIXBUF_S2S_RATIO(pBuf, samples) (((int64_t) samples << 32) / (pBuf)->iFreqRatio)
|
|---|
| 50 |
|
|---|
| 51 |
|
|---|
| 52 | int AudioMixBufAcquire(PPDMAUDIOMIXBUF pMixBuf, uint32_t cSamplesToRead, PPDMAUDIOSAMPLE *ppvSamples, uint32_t *pcSamplesRead);
|
|---|
| 53 | inline uint32_t AudioMixBufBytesToSamples(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 54 | void AudioMixBufClear(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 55 | void AudioMixBufDestroy(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 56 | void AudioMixBufFinish(PPDMAUDIOMIXBUF pMixBuf, uint32_t cSamplesToClear);
|
|---|
| 57 | uint32_t AudioMixBufFree(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 58 | uint32_t AudioMixBufFreeBytes(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 59 | int AudioMixBufInit(PPDMAUDIOMIXBUF pMixBuf, const char *pszName, PPDMPCMPROPS pProps, uint32_t cSamples);
|
|---|
| 60 | bool AudioMixBufIsEmpty(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 61 | int AudioMixBufLinkTo(PPDMAUDIOMIXBUF pMixBuf, PPDMAUDIOMIXBUF pParent);
|
|---|
| 62 | uint32_t AudioMixBufMixed(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 63 | int AudioMixBufMixToChildren(PPDMAUDIOMIXBUF pMixBuf, uint32_t cSamples, uint32_t *pcProcessed);
|
|---|
| 64 | int AudioMixBufMixToParent(PPDMAUDIOMIXBUF pMixBuf, uint32_t cSamples, uint32_t *pcProcessed);
|
|---|
| 65 | uint32_t AudioMixBufProcessed(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 66 | int AudioMixBufReadAt(PPDMAUDIOMIXBUF pMixBuf, uint32_t offSamples, void *pvBuf, uint32_t cbBuf, uint32_t *pcbRead);
|
|---|
| 67 | int AudioMixBufReadAtEx(PPDMAUDIOMIXBUF pMixBuf, PDMAUDIOMIXBUFFMT enmFmt, uint32_t offSamples, void *pvBuf, uint32_t cbBuf, uint32_t *pcbRead);
|
|---|
| 68 | int AudioMixBufReadCirc(PPDMAUDIOMIXBUF pMixBuf, void *pvBuf, uint32_t cbBuf, uint32_t *pcRead);
|
|---|
| 69 | int AudioMixBufReadCircEx(PPDMAUDIOMIXBUF pMixBuf, PDMAUDIOMIXBUFFMT enmFmt, void *pvBuf, uint32_t cbBuf, uint32_t *pcRead);
|
|---|
| 70 | void AudioMixBufReset(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 71 | void AudioMixBufSetVolume(PPDMAUDIOMIXBUF pMixBuf, PPDMAUDIOVOLUME pVol);
|
|---|
| 72 | uint32_t AudioMixBufSize(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 73 | uint32_t AudioMixBufSizeBytes(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 74 | void AudioMixBufUnlink(PPDMAUDIOMIXBUF pMixBuf);
|
|---|
| 75 | int AudioMixBufWriteAt(PPDMAUDIOMIXBUF pMixBuf, uint32_t offSamples, const void *pvBuf, uint32_t cbBuf, uint32_t *pcWritten);
|
|---|
| 76 | int AudioMixBufWriteAtEx(PPDMAUDIOMIXBUF pMixBuf, PDMAUDIOMIXBUFFMT enmFmt, uint32_t offSamples, const void *pvBuf, uint32_t cbBuf, uint32_t *pcWritten);
|
|---|
| 77 | int AudioMixBufWriteCirc(PPDMAUDIOMIXBUF pMixBuf, const void *pvBuf, uint32_t cbBuf, uint32_t *pcWritten);
|
|---|
| 78 | int AudioMixBufWriteCircEx(PPDMAUDIOMIXBUF pMixBuf, PDMAUDIOMIXBUFFMT enmFmt, const void *pvBuf, uint32_t cbBuf, uint32_t *pcWritten);
|
|---|
| 79 |
|
|---|
| 80 | #endif /* AUDIO_MIXBUF_H */
|
|---|
| 81 |
|
|---|
