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// Copyright 2005-2017 The Mumble Developers. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file at the root of the
// Mumble source tree or at <https://www.mumble.info/LICENSE>.
#include "mumble_pch.hpp"
#include "AudioOutputSpeech.h"
#include "Audio.h"
#include "CELTCodec.h"
#include "ClientUser.h"
#include "Global.h"
#include "PacketDataStream.h"
#ifdef USE_OPUS
#include "opus.h"
#endif
AudioOutputSpeech::AudioOutputSpeech(ClientUser *user, unsigned int freq, MessageHandler::UDPMessageType type) : AudioOutputUser(user->qsName) {
int err;
p = user;
umtType = type;
iMixerFreq = freq;
cCodec = NULL;
cdDecoder = NULL;
dsSpeex = NULL;
opusState = NULL;
bHasTerminator = false;
bStereo = false;
iSampleRate = SAMPLE_RATE;
iFrameSize = iSampleRate / 100;
iAudioBufferSize = iFrameSize;
if (umtType == MessageHandler::UDPVoiceOpus) {
#ifdef USE_OPUS
iAudioBufferSize *= 12;
opusState = opus_decoder_create(iSampleRate, bStereo ? 2 : 1, NULL);
#endif
} else if (umtType == MessageHandler::UDPVoiceSpeex) {
speex_bits_init(&sbBits);
dsSpeex = speex_decoder_init(speex_lib_get_mode(SPEEX_MODEID_UWB));
int iArg=1;
speex_decoder_ctl(dsSpeex, SPEEX_SET_ENH, &iArg);
speex_decoder_ctl(dsSpeex, SPEEX_GET_FRAME_SIZE, &iFrameSize);
speex_decoder_ctl(dsSpeex, SPEEX_GET_SAMPLING_RATE, &iSampleRate);
iAudioBufferSize = iFrameSize;
}
iOutputSize = static_cast<unsigned int>(ceilf(static_cast<float>(iAudioBufferSize * iMixerFreq) / static_cast<float>(iSampleRate)));
if (bStereo) {
iAudioBufferSize *= 2;
iOutputSize *= 2;
}
srs = NULL;
fResamplerBuffer = NULL;
if (iMixerFreq != iSampleRate) {
srs = speex_resampler_init(bStereo ? 2 : 1, iSampleRate, iMixerFreq, 3, &err);
fResamplerBuffer = new float[iAudioBufferSize];
}
iBufferOffset = iBufferFilled = iLastConsume = 0;
bLastAlive = true;
iMissCount = 0;
iMissedFrames = 0;
ucFlags = 0xFF;
jbJitter = jitter_buffer_init(iFrameSize);
int margin = g.s.iJitterBufferSize * iFrameSize;
jitter_buffer_ctl(jbJitter, JITTER_BUFFER_SET_MARGIN, &margin);
fFadeIn = new float[iFrameSize];
fFadeOut = new float[iFrameSize];
float mul = static_cast<float>(M_PI / (2.0 * static_cast<double>(iFrameSize)));
for (unsigned int i=0;i<iFrameSize;++i)
fFadeIn[i] = fFadeOut[iFrameSize-i-1] = sinf(static_cast<float>(i) * mul);
}
AudioOutputSpeech::~AudioOutputSpeech() {
#ifdef USE_OPUS
if (opusState)
opus_decoder_destroy(opusState);
#endif
if (cdDecoder) {
cCodec->celt_decoder_destroy(cdDecoder);
} else if (dsSpeex) {
speex_bits_destroy(&sbBits);
speex_decoder_destroy(dsSpeex);
}
if (srs)
speex_resampler_destroy(srs);
jitter_buffer_destroy(jbJitter);
delete [] fFadeIn;
delete [] fFadeOut;
delete [] fResamplerBuffer;
}
void AudioOutputSpeech::addFrameToBuffer(const QByteArray &qbaPacket, unsigned int iSeq) {
QMutexLocker lock(&qmJitter);
if (qbaPacket.size() < 2)
return;
PacketDataStream pds(qbaPacket);
// skip flags
pds.next();
int samples = 0;
if (umtType == MessageHandler::UDPVoiceOpus) {
int size;
pds >> size;
size &= 0x1fff;
if (size == 0) {
return;
}
const QByteArray &qba = pds.dataBlock(size);
if (size != qba.size() || !pds.isValid()) {
return;
}
const unsigned char *packet = reinterpret_cast<const unsigned char*>(qba.constData());
#ifdef USE_OPUS
int frames = opus_packet_get_nb_frames(packet, size);
samples = frames * opus_packet_get_samples_per_frame(packet, SAMPLE_RATE);
#else
return;
#endif
// We can't handle frames which are not a multiple of 10ms.
Q_ASSERT(samples % iFrameSize == 0);
} else {
unsigned int header = 0;
do {
header = static_cast<unsigned char>(pds.next());
samples += iFrameSize;
pds.skip(header & 0x7f);
} while ((header & 0x80) && pds.isValid());
}
if (pds.isValid()) {
JitterBufferPacket jbp;
jbp.data = const_cast<char *>(qbaPacket.constData());
jbp.len = qbaPacket.size();
jbp.span = samples;
jbp.timestamp = iFrameSize * iSeq;
jitter_buffer_put(jbJitter, &jbp);
}
}
bool AudioOutputSpeech::needSamples(unsigned int snum) {
for (unsigned int i=iLastConsume;i<iBufferFilled;++i)
pfBuffer[i-iLastConsume]=pfBuffer[i];
iBufferFilled -= iLastConsume;
iLastConsume = snum;
if (iBufferFilled >= snum)
return bLastAlive;
float *pOut;
bool nextalive = bLastAlive;
while (iBufferFilled < snum) {
int decodedSamples = iFrameSize;
resizeBuffer(iBufferFilled + iOutputSize);
pOut = (srs) ? fResamplerBuffer : (pfBuffer + iBufferFilled);
if (! bLastAlive) {
memset(pOut, 0, iFrameSize * sizeof(float));
} else {
if (p == &LoopUser::lpLoopy) {
LoopUser::lpLoopy.fetchFrames();
}
int avail = 0;
int ts = jitter_buffer_get_pointer_timestamp(jbJitter);
jitter_buffer_ctl(jbJitter, JITTER_BUFFER_GET_AVAILABLE_COUNT, &avail);
if (p && (ts == 0)) {
int want = iroundf(p->fAverageAvailable);
if (avail < want) {
++iMissCount;
if (iMissCount < 20) {
memset(pOut, 0, iFrameSize * sizeof(float));
goto nextframe;
}
}
}
if (qlFrames.isEmpty()) {
QMutexLocker lock(&qmJitter);
char data[4096];
JitterBufferPacket jbp;
jbp.data = data;
jbp.len = 4096;
spx_int32_t startofs = 0;
if (jitter_buffer_get(jbJitter, &jbp, iFrameSize, &startofs) == JITTER_BUFFER_OK) {
PacketDataStream pds(jbp.data, jbp.len);
iMissCount = 0;
ucFlags = static_cast<unsigned char>(pds.next());
bHasTerminator = false;
if (umtType == MessageHandler::UDPVoiceOpus) {
int size;
pds >> size;
bHasTerminator = size & 0x2000;
qlFrames << pds.dataBlock(size & 0x1fff);
} else {
unsigned int header = 0;
do {
header = static_cast<unsigned int>(pds.next());
if (header)
qlFrames << pds.dataBlock(header & 0x7f);
else
bHasTerminator = true;
} while ((header & 0x80) && pds.isValid());
}
if (pds.left()) {
pds >> fPos[0];
pds >> fPos[1];
pds >> fPos[2];
} else {
fPos[0] = fPos[1] = fPos[2] = 0.0f;
}
if (p) {
float a = static_cast<float>(avail);
if (avail >= p->fAverageAvailable)
p->fAverageAvailable = a;
else
p->fAverageAvailable *= 0.99f;
}
} else {
jitter_buffer_update_delay(jbJitter, &jbp, NULL);
iMissCount++;
if (iMissCount > 10)
nextalive = false;
}
}
if (! qlFrames.isEmpty()) {
QByteArray qba = qlFrames.takeFirst();
if (umtType == MessageHandler::UDPVoiceCELTAlpha || umtType == MessageHandler::UDPVoiceCELTBeta) {
int wantversion = (umtType == MessageHandler::UDPVoiceCELTAlpha) ? g.iCodecAlpha : g.iCodecBeta;
if ((p == &LoopUser::lpLoopy) && (! g.qmCodecs.isEmpty())) {
QMap<int, CELTCodec *>::const_iterator i = g.qmCodecs.constEnd();
--i;
wantversion = i.key();
}
if (cCodec && (cCodec->bitstreamVersion() != wantversion)) {
cCodec->celt_decoder_destroy(cdDecoder);
cdDecoder = NULL;
}
if (! cCodec) {
cCodec = g.qmCodecs.value(wantversion);
if (cCodec) {
cdDecoder = cCodec->decoderCreate();
}
}
if (cdDecoder)
cCodec->decode_float(cdDecoder, qba.isEmpty() ? NULL : reinterpret_cast<const unsigned char *>(qba.constData()), qba.size(), pOut);
else
memset(pOut, 0, sizeof(float) * iFrameSize);
} else if (umtType == MessageHandler::UDPVoiceOpus) {
#ifdef USE_OPUS
decodedSamples = opus_decode_float(opusState,
qba.isEmpty() ?
NULL :
reinterpret_cast<const unsigned char *>(qba.constData()),
qba.size(),
pOut,
iAudioBufferSize,
0);
if (decodedSamples < 0) {
decodedSamples = iFrameSize;
memset(pOut, 0, iFrameSize * sizeof(float));
}
#endif
} else {
if (qba.isEmpty()) {
speex_decode(dsSpeex, NULL, pOut);
} else {
speex_bits_read_from(&sbBits, qba.data(), qba.size());
speex_decode(dsSpeex, &sbBits, pOut);
}
for (unsigned int i=0;i<iFrameSize;++i)
pOut[i] *= (1.0f / 32767.f);
}
bool update = true;
if (p) {
float &fPowerMax = p->fPowerMax;
float &fPowerMin = p->fPowerMin;
float pow = 0.0f;
for (int i = 0; i < decodedSamples; ++i)
pow += pOut[i] * pOut[i];
pow = sqrtf(pow / static_cast<float>(decodedSamples));
if (pow >= fPowerMax) {
fPowerMax = pow;
} else {
if (pow <= fPowerMin) {
fPowerMin = pow;
} else {
fPowerMax = 0.99f * fPowerMax;
fPowerMin += 0.0001f * pow;
}
}
update = (pow < (fPowerMin + 0.01f * (fPowerMax - fPowerMin)));
}
if (qlFrames.isEmpty() && update)
jitter_buffer_update_delay(jbJitter, NULL, NULL);
if (qlFrames.isEmpty() && bHasTerminator)
nextalive = false;
} else {
if (umtType == MessageHandler::UDPVoiceCELTAlpha || umtType == MessageHandler::UDPVoiceCELTBeta) {
if (cdDecoder)
cCodec->decode_float(cdDecoder, NULL, 0, pOut);
else
memset(pOut, 0, sizeof(float) * iFrameSize);
} else if (umtType == MessageHandler::UDPVoiceOpus) {
#ifdef USE_OPUS
decodedSamples = opus_decode_float(opusState, NULL, 0, pOut, iFrameSize, 0);
if (decodedSamples < 0) {
decodedSamples = iFrameSize;
memset(pOut, 0, iFrameSize * sizeof(float));
}
#endif
} else {
speex_decode(dsSpeex, NULL, pOut);
for (unsigned int i=0;i<iFrameSize;++i)
pOut[i] *= (1.0f / 32767.f);
}
}
if (! nextalive) {
for (unsigned int i=0;i<iFrameSize;++i)
pOut[i] *= fFadeOut[i];
} else if (ts == 0) {
for (unsigned int i=0;i<iFrameSize;++i)
pOut[i] *= fFadeIn[i];
}
for (int i = decodedSamples / iFrameSize; i > 0; --i) {
jitter_buffer_tick(jbJitter);
}
}
nextframe:
spx_uint32_t inlen = decodedSamples;
spx_uint32_t outlen = static_cast<unsigned int>(ceilf(static_cast<float>(decodedSamples * iMixerFreq) / static_cast<float>(iSampleRate)));
if (srs && bLastAlive)
speex_resampler_process_float(srs, 0, fResamplerBuffer, &inlen, pfBuffer + iBufferFilled, &outlen);
iBufferFilled += outlen;
}
if (p) {
Settings::TalkState ts;
if (! nextalive)
ucFlags = 0xFF;
switch (ucFlags) {
case 0:
ts = Settings::Talking;
break;
case 1:
ts = Settings::Shouting;
break;
case 0xFF:
ts = Settings::Passive;
break;
default:
ts = Settings::Whispering;
break;
}
p->setTalking(ts);
}
bool tmp = bLastAlive;
bLastAlive = nextalive;
return tmp;
}
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