static DECLCALLBACK(int) drvHostALSAAudioCaptureIn(PPDMIHOSTAUDIO pInterface, PPDMAUDIOHSTSTRMIN pHstStrmIn,
uint32_t *pcSamplesCaptured)
{
NOREF(pInterface);
AssertPtrReturn(pHstStrmIn, VERR_INVALID_POINTER);
PALSAAUDIOSTREAMIN pThisStrmIn = (PALSAAUDIOSTREAMIN)pHstStrmIn;
snd_pcm_sframes_t cAvail;
int rc = drvHostALSAAudioGetAvail(pThisStrmIn->phPCM, &cAvail);
if (RT_FAILURE(rc))
{
LogFunc(("Error getting number of captured frames, rc=%Rrc\n", rc));
return rc;
}
if (!cAvail) /* No data yet? */
{
snd_pcm_state_t state = snd_pcm_state(pThisStrmIn->phPCM);
switch (state)
{
case SND_PCM_STATE_PREPARED:
cAvail = AudioMixBufFree(&pHstStrmIn->MixBuf);
break;
case SND_PCM_STATE_SUSPENDED:
{
rc = drvHostALSAAudioResume(pThisStrmIn->phPCM);
if (RT_FAILURE(rc))
break;
LogFlow(("Resuming suspended input stream\n"));
break;
}
default:
LogFlow(("No frames available, state=%d\n", state));
break;
}
if (!cAvail)
{
if (pcSamplesCaptured)
*pcSamplesCaptured = 0;
return VINF_SUCCESS;
}
}
/*
* Check how much we can read from the capture device without overflowing
* the mixer buffer.
*/
Assert(cAvail);
size_t cbMixFree = AudioMixBufFreeBytes(&pHstStrmIn->MixBuf);
size_t cbToRead = RT_MIN((size_t)AUDIOMIXBUF_S2B(&pHstStrmIn->MixBuf, cAvail), cbMixFree);
LogFlowFunc(("cbToRead=%zu, cAvail=%RI32\n", cbToRead, cAvail));
uint32_t cWrittenTotal = 0;
snd_pcm_uframes_t cToRead;
snd_pcm_sframes_t cRead;
while ( cbToRead
&& RT_SUCCESS(rc))
{
cToRead = RT_MIN(AUDIOMIXBUF_B2S(&pHstStrmIn->MixBuf, cbToRead),
AUDIOMIXBUF_B2S(&pHstStrmIn->MixBuf, pThisStrmIn->cbBuf));
AssertBreakStmt(cToRead, rc = VERR_NO_DATA);
cRead = snd_pcm_readi(pThisStrmIn->phPCM, pThisStrmIn->pvBuf, cToRead);
if (cRead <= 0)
{
switch (cRead)
{
case 0:
{
LogFunc(("No input frames available\n"));
rc = VERR_ACCESS_DENIED;
break;
}
case -EAGAIN:
/*
* Don't set error here because EAGAIN means there are no further frames
* available at the moment, try later. As we might have read some frames
* already these need to be processed instead.
*/
cbToRead = 0;
break;
case -EPIPE:
{
rc = drvHostALSAAudioRecover(pThisStrmIn->phPCM);
if (RT_FAILURE(rc))
break;
LogFlowFunc(("Recovered from capturing\n"));
continue;
}
default:
LogFunc(("Failed to read input frames: %s\n", snd_strerror(cRead)));
rc = VERR_GENERAL_FAILURE; /** @todo Fudge! */
break;
}
}
else
{
uint32_t cWritten;
rc = AudioMixBufWriteCirc(&pHstStrmIn->MixBuf,
pThisStrmIn->pvBuf, AUDIOMIXBUF_S2B(&pHstStrmIn->MixBuf, cRead),
&cWritten);
if (RT_FAILURE(rc))
break;
/*
* We should not run into a full mixer buffer or we loose samples and
* run into an endless loop if ALSA keeps producing samples ("null"
* capture device for example).
*/
AssertLogRelMsgBreakStmt(cWritten > 0, ("Mixer buffer shouldn't be full at this point!\n"),
rc = VERR_INTERNAL_ERROR);
uint32_t cbWritten = AUDIOMIXBUF_S2B(&pHstStrmIn->MixBuf, cWritten);
Assert(cbToRead >= cbWritten);
cbToRead -= cbWritten;
cWrittenTotal += cWritten;
}
}
if (RT_SUCCESS(rc))
{
uint32_t cProcessed = 0;
if (cWrittenTotal)
rc = AudioMixBufMixToParent(&pHstStrmIn->MixBuf, cWrittenTotal,
&cProcessed);
if (pcSamplesCaptured)
*pcSamplesCaptured = cWrittenTotal;
LogFlowFunc(("cWrittenTotal=%RU32 (%RU32 processed), rc=%Rrc\n",
cWrittenTotal, cProcessed, 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;
}
/* 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;
}
/* 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;
}
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;
}