static DECLCALLBACK(int) drvHostALSAAudioPlayOut(PPDMIHOSTAUDIO pInterface, PPDMAUDIOHSTSTRMOUT pHstStrmOut,
uint32_t *pcSamplesPlayed)
{
NOREF(pInterface);
AssertPtrReturn(pHstStrmOut, VERR_INVALID_POINTER);
PALSAAUDIOSTREAMOUT pThisStrmOut = (PALSAAUDIOSTREAMOUT)pHstStrmOut;
int rc = VINF_SUCCESS;
uint32_t cbReadTotal = 0;
do
{
snd_pcm_sframes_t cAvail;
rc = drvHostALSAAudioGetAvail(pThisStrmOut->phPCM, &cAvail);
if (RT_FAILURE(rc))
{
LogFunc(("Error getting number of playback frames, rc=%Rrc\n", rc));
break;
}
size_t cbToRead = RT_MIN(AUDIOMIXBUF_S2B(&pHstStrmOut->MixBuf,
cAvail),
AUDIOMIXBUF_S2B(&pHstStrmOut->MixBuf,
drvAudioHstOutSamplesLive(pHstStrmOut, NULL /* pcStreamsLive */)));
LogFlowFunc(("cbToRead=%zu, cbAvail=%zu\n",
cbToRead, AUDIOMIXBUF_S2B(&pHstStrmOut->MixBuf, cAvail)));
uint32_t cRead, cbRead;
snd_pcm_sframes_t cWritten;
while (cbToRead)
{
rc = AudioMixBufReadCirc(&pHstStrmOut->MixBuf, pThisStrmOut->pvBuf, cbToRead, &cRead);
if (RT_FAILURE(rc))
break;
cbRead = AUDIOMIXBUF_S2B(&pHstStrmOut->MixBuf, cRead);
AssertBreak(cbRead);
cWritten = snd_pcm_writei(pThisStrmOut->phPCM, pThisStrmOut->pvBuf, cRead);
if (cWritten <= 0)
{
switch (cWritten)
{
case 0:
{
LogFunc(("Failed to write %RI32 frames\n", cRead));
rc = VERR_ACCESS_DENIED;
break;
}
case -EPIPE:
{
rc = drvHostALSAAudioRecover(pThisStrmOut->phPCM);
if (RT_FAILURE(rc))
break;
LogFlowFunc(("Recovered from playback\n"));
continue;
}
case -ESTRPIPE:
{
/* Stream was suspended and waiting for a recovery. */
rc = drvHostALSAAudioResume(pThisStrmOut->phPCM);
if (RT_FAILURE(rc))
{
LogRel(("ALSA: Failed to resume output stream\n"));
break;
}
LogFlowFunc(("Resumed suspended output stream\n"));
continue;
}
default:
LogFlowFunc(("Failed to write %RI32 output frames, rc=%Rrc\n",
cRead, rc));
rc = VERR_GENERAL_FAILURE; /** @todo */
break;
}
}
if (RT_FAILURE(rc))
break;
Assert(cbToRead >= cbRead);
cbToRead -= cbRead;
cbReadTotal += cbRead;
}
}
while (0);
if (RT_SUCCESS(rc))
{
uint32_t cReadTotal = AUDIOMIXBUF_B2S(&pHstStrmOut->MixBuf, cbReadTotal);
if (cReadTotal)
AudioMixBufFinish(&pHstStrmOut->MixBuf, cReadTotal);
if (pcSamplesPlayed)
*pcSamplesPlayed = cReadTotal;
LogFlowFunc(("cReadTotal=%RU32 (%RU32 bytes), rc=%Rrc\n",
cReadTotal, cbReadTotal, rc));
}
LogFlowFuncLeaveRC(rc);
return rc;
}
/* Test volume control. */
static int tstVolume(RTTEST hTest)
{
unsigned i;
uint32_t cBufSize = 256;
PDMPCMPROPS props;
RTTestSubF(hTest, "Volume control");
/* Same for parent/child. */
PDMAUDIOSTREAMCFG cfg =
{
44100, /* Hz */
2 /* Channels */,
AUD_FMT_S16 /* Format */,
PDMAUDIOENDIANNESS_LITTLE /* ENDIANNESS */
};
int rc = DrvAudioStreamCfgToProps(&cfg, &props);
AssertRC(rc);
PDMAUDIOVOLUME vol = { false, 0, 0 }; /* Not muted. */
PDMAUDIOMIXBUF parent;
RTTESTI_CHECK_RC_OK(AudioMixBufInit(&parent, "Parent", &props, cBufSize));
PDMAUDIOMIXBUF child;
RTTESTI_CHECK_RC_OK(AudioMixBufInit(&child, "Child", &props, cBufSize));
RTTESTI_CHECK_RC_OK(AudioMixBufLinkTo(&child, &parent));
/* A few 16-bit signed samples. */
int16_t samples[16] = { INT16_MIN, INT16_MIN + 1, -128, -64, -4, -1, 0, 1,
2, 255, 256, INT16_MAX / 2, INT16_MAX - 2, INT16_MAX - 1, INT16_MAX, 0 };
/*
* Writing + mixing from child -> parent.
*/
uint32_t cbBuf = 256;
char achBuf[256];
uint32_t read, written, mixed;
uint32_t cChildFree = cBufSize;
uint32_t cChildMixed = 0;
uint32_t cSamplesChild = 8;
uint32_t cSamplesParent = cSamplesChild;
uint32_t cSamplesRead;
int16_t *pSrc16;
int16_t *pDst16;
/**** Volume control test ****/
RTTestPrintf(hTest, RTTESTLVL_DEBUG, "Volume control test %uHz %uch \n", cfg.uHz, cfg.cChannels);
/* 1) Full volume/0dB attenuation (255). */
vol.uLeft = vol.uRight = 255;
AudioMixBufSetVolume(&child, &vol);
RTTESTI_CHECK_RC_OK(AudioMixBufWriteAt(&child, 0, &samples, sizeof(samples), &written));
RTTESTI_CHECK_MSG(written == cSamplesChild, ("Child: Expected %RU32 written samples, got %RU32\n", cSamplesChild, written));
RTTESTI_CHECK_RC_OK(AudioMixBufMixToParent(&child, written, &mixed));
cSamplesRead = 0;
for (;;)
{
RTTESTI_CHECK_RC_OK_BREAK(AudioMixBufReadCirc(&parent, achBuf, cbBuf, &read));
if (!read)
break;
cSamplesRead += read;
AudioMixBufFinish(&parent, read);
}
RTTESTI_CHECK_MSG(cSamplesRead == cSamplesParent, ("Parent: Expected %RU32 mixed samples, got %RU32\n", cSamplesParent, cSamplesRead));
/* Check that at 0dB the samples came out unharmed. */
pSrc16 = &samples[0];
pDst16 = (int16_t *)achBuf;
for (i = 0; i < cSamplesParent * 2 /* stereo */; ++i)
{
RTTESTI_CHECK_MSG(*pSrc16 == *pDst16, ("index %u: Dst=%d, Src=%d\n", i, *pDst16, *pSrc16));
++pSrc16;
++pDst16;
}
AudioMixBufReset(&child);
/* 2) Half volume/-6dB attenuation (16 steps down). */
vol.uLeft = vol.uRight = 255 - 16;
AudioMixBufSetVolume(&child, &vol);
RTTESTI_CHECK_RC_OK(AudioMixBufWriteAt(&child, 0, &samples, sizeof(samples), &written));
RTTESTI_CHECK_MSG(written == cSamplesChild, ("Child: Expected %RU32 written samples, got %RU32\n", cSamplesChild, written));
RTTESTI_CHECK_RC_OK(AudioMixBufMixToParent(&child, written, &mixed));
cSamplesRead = 0;
for (;;)
{
RTTESTI_CHECK_RC_OK_BREAK(AudioMixBufReadCirc(&parent, achBuf, cbBuf, &read));
if (!read)
break;
cSamplesRead += read;
AudioMixBufFinish(&parent, read);
}
RTTESTI_CHECK_MSG(cSamplesRead == cSamplesParent, ("Parent: Expected %RU32 mixed samples, got %RU32\n", cSamplesParent, cSamplesRead));
/* Check that at -6dB the sample values are halved. */
pSrc16 = &samples[0];
pDst16 = (int16_t *)achBuf;
for (i = 0; i < cSamplesParent * 2 /* stereo */; ++i)
{
/* Watch out! For negative values, x >> 1 is not the same as x / 2. */
RTTESTI_CHECK_MSG(*pSrc16 >> 1 == *pDst16, ("index %u: Dst=%d, Src=%d\n", i, *pDst16, *pSrc16));
++pSrc16;
++pDst16;
}
AudioMixBufDestroy(&parent);
AudioMixBufDestroy(&child);
return RTTestSubErrorCount(hTest) ? VERR_GENERAL_FAILURE : VINF_SUCCESS;
}
static int tstSingle(RTTEST hTest)
{
RTTestSubF(hTest, "Single buffer");
PDMAUDIOSTREAMCFG config =
{
44100, /* Hz */
2 /* Channels */,
AUD_FMT_S16 /* Format */,
PDMAUDIOENDIANNESS_LITTLE /* ENDIANNESS */
};
PDMPCMPROPS props;
int rc = DrvAudioStreamCfgToProps(&config, &props);
AssertRC(rc);
uint32_t cBufSize = _1K;
/*
* General stuff.
*/
PDMAUDIOMIXBUF mb;
RTTESTI_CHECK_RC_OK(AudioMixBufInit(&mb, "Single", &props, cBufSize));
RTTESTI_CHECK(AudioMixBufSize(&mb) == cBufSize);
RTTESTI_CHECK(AUDIOMIXBUF_B2S(&mb, AudioMixBufSizeBytes(&mb)) == cBufSize);
RTTESTI_CHECK(AUDIOMIXBUF_S2B(&mb, AudioMixBufSize(&mb)) == AudioMixBufSizeBytes(&mb));
RTTESTI_CHECK(AudioMixBufFree(&mb) == cBufSize);
RTTESTI_CHECK(AUDIOMIXBUF_S2B(&mb, AudioMixBufFree(&mb)) == AudioMixBufFreeBytes(&mb));
/*
* Absolute writes.
*/
uint32_t read = 0, written = 0, written_abs = 0;
int8_t samples8 [2] = { 0x12, 0x34 };
int16_t samples16[2] = { 0xAA, 0xBB };
int32_t samples32[2] = { 0xCC, 0xDD };
int64_t samples64[2] = { 0xEE, 0xFF };
RTTESTI_CHECK_RC_OK(AudioMixBufWriteAt(&mb, 0, &samples8, sizeof(samples8), &written));
RTTESTI_CHECK(written == 0 /* Samples */);
RTTESTI_CHECK_RC_OK(AudioMixBufWriteAt(&mb, 0, &samples16, sizeof(samples16), &written));
RTTESTI_CHECK(written == 1 /* Samples */);
RTTESTI_CHECK_RC_OK(AudioMixBufWriteAt(&mb, 2, &samples32, sizeof(samples32), &written));
RTTESTI_CHECK(written == 2 /* Samples */);
written_abs = 0;
/* Beyond buffer. */
RTTESTI_CHECK_RC(AudioMixBufWriteAt(&mb, AudioMixBufSize(&mb) + 1, &samples16, sizeof(samples16),
&written), VERR_BUFFER_OVERFLOW);
/*
* Circular writes.
*/
uint32_t cToWrite = AudioMixBufSize(&mb) - written_abs - 1; /* -1 as padding plus -2 samples for above. */
for (uint32_t i = 0; i < cToWrite; i++)
{
RTTESTI_CHECK_RC_OK(AudioMixBufWriteCirc(&mb, &samples16, sizeof(samples16), &written));
RTTESTI_CHECK(written == 1);
}
RTTESTI_CHECK(!AudioMixBufIsEmpty(&mb));
RTTESTI_CHECK(AudioMixBufFree(&mb) == 1);
RTTESTI_CHECK(AudioMixBufFreeBytes(&mb) == AUDIOMIXBUF_S2B(&mb, 1U));
RTTESTI_CHECK(AudioMixBufProcessed(&mb) == cToWrite + written_abs /* + last absolute write */);
RTTESTI_CHECK_RC_OK(AudioMixBufWriteCirc(&mb, &samples16, sizeof(samples16), &written));
RTTESTI_CHECK(written == 1);
RTTESTI_CHECK(AudioMixBufFree(&mb) == 0);
RTTESTI_CHECK(AudioMixBufFreeBytes(&mb) == AUDIOMIXBUF_S2B(&mb, 0));
RTTESTI_CHECK(AudioMixBufProcessed(&mb) == cBufSize);
/* Circular reads. */
uint32_t cToRead = AudioMixBufSize(&mb) - written_abs - 1;
for (uint32_t i = 0; i < cToWrite; i++)
{
RTTESTI_CHECK_RC_OK(AudioMixBufReadCirc(&mb, &samples16, sizeof(samples16), &read));
RTTESTI_CHECK(read == 1);
AudioMixBufFinish(&mb, read);
}
RTTESTI_CHECK(!AudioMixBufIsEmpty(&mb));
RTTESTI_CHECK(AudioMixBufFree(&mb) == AudioMixBufSize(&mb) - written_abs - 1);
RTTESTI_CHECK(AudioMixBufFreeBytes(&mb) == AUDIOMIXBUF_S2B(&mb, cBufSize - written_abs - 1));
RTTESTI_CHECK(AudioMixBufProcessed(&mb) == cBufSize - cToRead + written_abs);
RTTESTI_CHECK_RC_OK(AudioMixBufReadCirc(&mb, &samples16, sizeof(samples16), &read));
RTTESTI_CHECK(read == 1);
AudioMixBufFinish(&mb, read);
RTTESTI_CHECK(AudioMixBufFree(&mb) == cBufSize - written_abs);
RTTESTI_CHECK(AudioMixBufFreeBytes(&mb) == AUDIOMIXBUF_S2B(&mb, cBufSize - written_abs));
RTTESTI_CHECK(AudioMixBufProcessed(&mb) == written_abs);
AudioMixBufDestroy(&mb);
return RTTestSubErrorCount(hTest) ? VERR_GENERAL_FAILURE : VINF_SUCCESS;
}
/* Test 16-bit sample conversion (16-bit -> internal -> 16-bit). */
static int tstConversion16(RTTEST hTest)
{
unsigned i;
uint32_t cBufSize = 256;
PDMPCMPROPS props;
RTTestSubF(hTest, "Sample conversion 16-bit");
PDMAUDIOSTREAMCFG cfg_p =
{
44100, /* Hz */
1 /* Channels */,
AUD_FMT_S16 /* Format */,
PDMAUDIOENDIANNESS_LITTLE /* ENDIANNESS */
};
int rc = DrvAudioStreamCfgToProps(&cfg_p, &props);
AssertRC(rc);
PDMAUDIOMIXBUF parent;
RTTESTI_CHECK_RC_OK(AudioMixBufInit(&parent, "Parent", &props, cBufSize));
PDMAUDIOSTREAMCFG cfg_c = /* Upmixing to parent */
{
22050, /* Hz */
1 /* Channels */,
AUD_FMT_S16 /* Format */,
PDMAUDIOENDIANNESS_LITTLE /* ENDIANNESS */
};
rc = DrvAudioStreamCfgToProps(&cfg_c, &props);
AssertRC(rc);
PDMAUDIOMIXBUF child;
RTTESTI_CHECK_RC_OK(AudioMixBufInit(&child, "Child", &props, cBufSize));
RTTESTI_CHECK_RC_OK(AudioMixBufLinkTo(&child, &parent));
/* 16-bit signed. More or less exclusively used as output, and usually as input, too. */
int16_t samples[16] = { 0xAA, 0xBB, INT16_MIN, INT16_MIN + 1, INT16_MIN / 2, -3, -2, -1,
0, 1, 2, 3, INT16_MAX / 2, INT16_MAX - 1, INT16_MAX, 0 };
/*
* Writing + mixing from child -> parent, sequential.
*/
uint32_t cbBuf = 256;
char achBuf[256];
uint32_t read, written, mixed, temp;
uint32_t cChildFree = cBufSize;
uint32_t cChildMixed = 0;
uint32_t cSamplesChild = 16;
uint32_t cSamplesParent = cSamplesChild * 2 - 2;
uint32_t cSamplesRead = 0;
/**** 16-bit signed samples ****/
RTTestPrintf(hTest, RTTESTLVL_DEBUG, "Conversion test %uHz %uch 16-bit\n", cfg_c.uHz, cfg_c.cChannels);
RTTESTI_CHECK_RC_OK(AudioMixBufWriteAt(&child, 0, &samples, sizeof(samples), &written));
RTTESTI_CHECK_MSG(written == cSamplesChild, ("Child: Expected %RU32 written samples, got %RU32\n", cSamplesChild, written));
RTTESTI_CHECK_RC_OK(AudioMixBufMixToParent(&child, written, &mixed));
temp = AudioMixBufProcessed(&parent);
RTTESTI_CHECK_MSG(AudioMixBufMixed(&child) == temp, ("Child: Expected %RU32 mixed samples, got %RU32\n", AudioMixBufMixed(&child), temp));
RTTESTI_CHECK(AudioMixBufProcessed(&parent) == AudioMixBufMixed(&child));
for (;;)
{
RTTESTI_CHECK_RC_OK_BREAK(AudioMixBufReadCirc(&parent, achBuf, cbBuf, &read));
if (!read)
break;
cSamplesRead += read;
AudioMixBufFinish(&parent, read);
}
RTTESTI_CHECK_MSG(cSamplesRead == cSamplesParent, ("Parent: Expected %RU32 mixed samples, got %RU32\n", cSamplesParent, cSamplesRead));
/* Check that the samples came out unharmed. Every other sample is interpolated and we ignore it. */
/* NB: This also checks that the default volume setting is 0dB attenuation. */
int16_t *pSrc16 = &samples[0];
int16_t *pDst16 = (int16_t *)achBuf;
for (i = 0; i < cSamplesChild - 1; ++i)
{
RTTESTI_CHECK_MSG(*pSrc16 == *pDst16, ("index %u: Dst=%d, Src=%d\n", i, *pDst16, *pSrc16));
pSrc16 += 1;
pDst16 += 2;
}
RTTESTI_CHECK(AudioMixBufProcessed(&parent) == 0);
RTTESTI_CHECK(AudioMixBufMixed(&child) == 0);
AudioMixBufDestroy(&parent);
AudioMixBufDestroy(&child);
return RTTestSubErrorCount(hTest) ? VERR_GENERAL_FAILURE : VINF_SUCCESS;
}
/* Test 8-bit sample conversion (8-bit -> internal -> 8-bit). */
static int tstConversion8(RTTEST hTest)
{
unsigned i;
uint32_t cBufSize = 256;
PDMPCMPROPS props;
RTTestSubF(hTest, "Sample conversion");
PDMAUDIOSTREAMCFG cfg_p =
{
44100, /* Hz */
1 /* Channels */,
AUD_FMT_U8 /* Format */,
PDMAUDIOENDIANNESS_LITTLE /* ENDIANNESS */
};
int rc = DrvAudioStreamCfgToProps(&cfg_p, &props);
AssertRC(rc);
PDMAUDIOMIXBUF parent;
RTTESTI_CHECK_RC_OK(AudioMixBufInit(&parent, "Parent", &props, cBufSize));
/* Child uses half the sample rate; that ensures the mixing engine can't
* take shortcuts and performs conversion. Because conversion to double
* the sample rate effectively inserts one additional sample between every
* two source samples, N source samples will be converted to N * 2 - 1
* samples. However, the last source sample will be saved for later
* interpolation and not immediately output.
*/
PDMAUDIOSTREAMCFG cfg_c = /* Upmixing to parent */
{
22050, /* Hz */
1 /* Channels */,
AUD_FMT_U8 /* Format */,
PDMAUDIOENDIANNESS_LITTLE /* ENDIANNESS */
};
rc = DrvAudioStreamCfgToProps(&cfg_c, &props);
AssertRC(rc);
PDMAUDIOMIXBUF child;
RTTESTI_CHECK_RC_OK(AudioMixBufInit(&child, "Child", &props, cBufSize));
RTTESTI_CHECK_RC_OK(AudioMixBufLinkTo(&child, &parent));
/* 8-bit unsigned samples. Often used with SB16 device. */
uint8_t samples[16] = { 0xAA, 0xBB, 0, 1, 43, 125, 126, 127,
128, 129, 130, 131, 132, UINT8_MAX - 1, UINT8_MAX, 0 };
/*
* Writing + mixing from child -> parent, sequential.
*/
uint32_t cbBuf = 256;
char achBuf[256];
uint32_t read, written, mixed, temp;
uint32_t cChildFree = cBufSize;
uint32_t cChildMixed = 0;
uint32_t cSamplesChild = 16;
uint32_t cSamplesParent = cSamplesChild * 2 - 2;
uint32_t cSamplesRead = 0;
/**** 8-bit unsigned samples ****/
RTTestPrintf(hTest, RTTESTLVL_DEBUG, "Conversion test %uHz %uch 8-bit\n", cfg_c.uHz, cfg_c.cChannels);
RTTESTI_CHECK_RC_OK(AudioMixBufWriteAt(&child, 0, &samples, sizeof(samples), &written));
RTTESTI_CHECK_MSG(written == cSamplesChild, ("Child: Expected %RU32 written samples, got %RU32\n", cSamplesChild, written));
RTTESTI_CHECK_RC_OK(AudioMixBufMixToParent(&child, written, &mixed));
temp = AudioMixBufProcessed(&parent);
RTTESTI_CHECK_MSG(AudioMixBufMixed(&child) == temp, ("Child: Expected %RU32 mixed samples, got %RU32\n", AudioMixBufMixed(&child), temp));
RTTESTI_CHECK(AudioMixBufProcessed(&parent) == AudioMixBufMixed(&child));
for (;;)
{
RTTESTI_CHECK_RC_OK_BREAK(AudioMixBufReadCirc(&parent, achBuf, cbBuf, &read));
if (!read)
break;
cSamplesRead += read;
AudioMixBufFinish(&parent, read);
}
RTTESTI_CHECK_MSG(cSamplesRead == cSamplesParent, ("Parent: Expected %RU32 mixed samples, got %RU32\n", cSamplesParent, cSamplesRead));
/* Check that the samples came out unharmed. Every other sample is interpolated and we ignore it. */
/* NB: This also checks that the default volume setting is 0dB attenuation. */
uint8_t *pSrc8 = &samples[0];
uint8_t *pDst8 = (uint8_t *)achBuf;
for (i = 0; i < cSamplesChild - 1; ++i)
{
RTTESTI_CHECK_MSG(*pSrc8 == *pDst8, ("index %u: Dst=%d, Src=%d\n", i, *pDst8, *pSrc8));
pSrc8 += 1;
pDst8 += 2;
}
RTTESTI_CHECK(AudioMixBufProcessed(&parent) == 0);
RTTESTI_CHECK(AudioMixBufMixed(&child) == 0);
AudioMixBufDestroy(&parent);
AudioMixBufDestroy(&child);
return RTTestSubErrorCount(hTest) ? VERR_GENERAL_FAILURE : VINF_SUCCESS;
}
static int tstParentChild(RTTEST hTest)
{
RTTestSubF(hTest, "2 Children -> Parent");
uint32_t cBufSize = _1K;
PDMAUDIOSTREAMCFG cfg_p =
{
44100, /* Hz */
2 /* Channels */,
AUD_FMT_S16 /* Format */,
PDMAUDIOENDIANNESS_LITTLE /* ENDIANNESS */
};
PDMPCMPROPS props;
int rc = DrvAudioStreamCfgToProps(&cfg_p, &props);
AssertRC(rc);
PDMAUDIOMIXBUF parent;
RTTESTI_CHECK_RC_OK(AudioMixBufInit(&parent, "Parent", &props, cBufSize));
PDMAUDIOSTREAMCFG cfg_c1 = /* Upmixing to parent */
{
22100, /* Hz */
2 /* Channels */,
AUD_FMT_S16 /* Format */,
PDMAUDIOENDIANNESS_LITTLE /* ENDIANNESS */
};
rc = DrvAudioStreamCfgToProps(&cfg_c1, &props);
AssertRC(rc);
PDMAUDIOMIXBUF child1;
RTTESTI_CHECK_RC_OK(AudioMixBufInit(&child1, "Child1", &props, cBufSize));
RTTESTI_CHECK_RC_OK(AudioMixBufLinkTo(&child1, &parent));
PDMAUDIOSTREAMCFG cfg_c2 = /* Downmixing to parent */
{
48000, /* Hz */
2 /* Channels */,
AUD_FMT_S16 /* Format */,
PDMAUDIOENDIANNESS_LITTLE /* ENDIANNESS */
};
rc = DrvAudioStreamCfgToProps(&cfg_c2, &props);
AssertRC(rc);
PDMAUDIOMIXBUF child2;
RTTESTI_CHECK_RC_OK(AudioMixBufInit(&child2, "Child2", &props, cBufSize));
RTTESTI_CHECK_RC_OK(AudioMixBufLinkTo(&child2, &parent));
/*
* Writing + mixing from child/children -> parent, sequential.
*/
uint32_t cbBuf = _1K;
char pvBuf[_1K];
int16_t samples[32] = { 0xAA, 0xBB };
uint32_t read , written, mixed, temp;
uint32_t cChild1Free = cBufSize;
uint32_t cChild1Mixed = 0;
uint32_t cSamplesParent1 = 16;
uint32_t cSamplesChild1 = 16;
uint32_t cChild2Free = cBufSize;
uint32_t cChild2Mixed = 0;
uint32_t cSamplesParent2 = 16;
uint32_t cSamplesChild2 = 16;
uint32_t t = RTRandU32() % 64;
for (uint32_t i = 0; i < t; i++)
{
RTTestPrintf(hTest, RTTESTLVL_DEBUG, "i=%RU32\n", i);
RTTESTI_CHECK_RC_OK_BREAK(AudioMixBufWriteAt(&child1, 0, &samples, sizeof(samples), &written));
RTTESTI_CHECK_MSG_BREAK(written == cSamplesChild1, ("Child1: Expected %RU32 written samples, got %RU32\n", cSamplesChild1, written));
RTTESTI_CHECK_RC_OK_BREAK(AudioMixBufMixToParent(&child1, written, &mixed));
temp = AudioMixBufProcessed(&parent) - AudioMixBufMixed(&child2);
RTTESTI_CHECK_MSG_BREAK(AudioMixBufMixed(&child1) == temp, ("Child1: Expected %RU32 mixed samples, got %RU32\n", AudioMixBufMixed(&child1), temp));
RTTESTI_CHECK_RC_OK_BREAK(AudioMixBufWriteAt(&child2, 0, &samples, sizeof(samples), &written));
RTTESTI_CHECK_MSG_BREAK(written == cSamplesChild2, ("Child2: Expected %RU32 written samples, got %RU32\n", cSamplesChild2, written));
RTTESTI_CHECK_RC_OK_BREAK(AudioMixBufMixToParent(&child2, written, &mixed));
temp = AudioMixBufProcessed(&parent) - AudioMixBufMixed(&child1);
RTTESTI_CHECK_MSG_BREAK(AudioMixBufMixed(&child2) == temp, ("Child2: Expected %RU32 mixed samples, got %RU32\n", AudioMixBufMixed(&child2), temp));
}
RTTESTI_CHECK(AudioMixBufProcessed(&parent) == AudioMixBufMixed(&child1) + AudioMixBufMixed(&child2));
for (;;)
{
RTTESTI_CHECK_RC_OK_BREAK(AudioMixBufReadCirc(&parent, pvBuf, cbBuf, &read));
if (!read)
break;
AudioMixBufFinish(&parent, read);
}
RTTESTI_CHECK(AudioMixBufProcessed(&parent) == 0);
RTTESTI_CHECK(AudioMixBufMixed(&child1) == 0);
RTTESTI_CHECK(AudioMixBufMixed(&child2) == 0);
AudioMixBufDestroy(&parent);
AudioMixBufDestroy(&child1);
AudioMixBufDestroy(&child2);
return RTTestSubErrorCount(hTest) ? VERR_GENERAL_FAILURE : VINF_SUCCESS;
}