mirror of
https://github.com/danog/libtgvoip.git
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320 lines
8.0 KiB
C++
Executable File
320 lines
8.0 KiB
C++
Executable File
//
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// libtgvoip is free and unencumbered public domain software.
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// For more information, see http://unlicense.org or the UNLICENSE file
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// you should have received with this source code distribution.
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//
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#include "OpusEncoder.h"
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#include <assert.h>
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#include <algorithm>
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#include "tools/logging.h"
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#include "VoIPServerConfig.h"
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#if defined HAVE_CONFIG_H || defined TGVOIP_USE_INSTALLED_OPUS
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#include <opus/opus.h>
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#else
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#include <opus/opus.h>
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#endif
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namespace
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{
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int serverConfigValueToBandwidth(int config)
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{
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switch (config)
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{
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case 0:
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return OPUS_BANDWIDTH_NARROWBAND;
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case 1:
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return OPUS_BANDWIDTH_MEDIUMBAND;
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case 2:
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return OPUS_BANDWIDTH_WIDEBAND;
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case 3:
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return OPUS_BANDWIDTH_SUPERWIDEBAND;
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case 4:
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default:
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return OPUS_BANDWIDTH_FULLBAND;
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}
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}
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} // namespace
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tgvoip::OpusEncoder::OpusEncoder(MediaStreamItf *source, bool needSecondary) : queue(10)
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{
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this->source = source;
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source->SetCallback(tgvoip::OpusEncoder::Callback, this);
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enc = opus_encoder_create(48000, 1, OPUS_APPLICATION_VOIP, NULL);
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opus_encoder_ctl(enc, OPUS_SET_COMPLEXITY(10));
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opus_encoder_ctl(enc, OPUS_SET_PACKET_LOSS_PERC(1));
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opus_encoder_ctl(enc, OPUS_SET_INBAND_FEC(1));
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opus_encoder_ctl(enc, OPUS_SET_SIGNAL(OPUS_SIGNAL_VOICE));
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opus_encoder_ctl(enc, OPUS_SET_BANDWIDTH(OPUS_AUTO));
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requestedBitrate = 20000;
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currentBitrate = 0;
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running = false;
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echoCanceller = NULL;
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complexity = 10;
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frameDuration = 20;
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levelMeter = NULL;
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vadNoVoiceBitrate = static_cast<uint32_t>(ServerConfig::GetSharedInstance()->GetInt("audio_vad_no_voice_bitrate", 6000));
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vadModeVoiceBandwidth = serverConfigValueToBandwidth(ServerConfig::GetSharedInstance()->GetInt("audio_vad_bandwidth", 3));
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vadModeNoVoiceBandwidth = serverConfigValueToBandwidth(ServerConfig::GetSharedInstance()->GetInt("audio_vad_no_voice_bandwidth", 0));
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secondaryEnabledBandwidth = serverConfigValueToBandwidth(ServerConfig::GetSharedInstance()->GetInt("audio_extra_ec_bandwidth", 2));
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secondaryEncoderEnabled = false;
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if (needSecondary)
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{
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secondaryEncoder = opus_encoder_create(48000, 1, OPUS_APPLICATION_VOIP, NULL);
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opus_encoder_ctl(secondaryEncoder, OPUS_SET_COMPLEXITY(10));
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opus_encoder_ctl(secondaryEncoder, OPUS_SET_SIGNAL(OPUS_SIGNAL_VOICE));
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opus_encoder_ctl(secondaryEncoder, OPUS_SET_BITRATE(8000));
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}
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else
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{
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secondaryEncoder = NULL;
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}
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}
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tgvoip::OpusEncoder::~OpusEncoder()
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{
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opus_encoder_destroy(enc);
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if (secondaryEncoder)
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opus_encoder_destroy(secondaryEncoder);
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}
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void tgvoip::OpusEncoder::Start()
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{
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if (running)
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return;
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running = true;
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thread = new Thread(std::bind(&tgvoip::OpusEncoder::RunThread, this));
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thread->SetName("OpusEncoder");
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thread->SetMaxPriority();
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thread->Start();
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}
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void tgvoip::OpusEncoder::Stop()
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{
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if (!running)
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return;
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running = false;
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queue.Put(Buffer());
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thread->Join();
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delete thread;
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}
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void tgvoip::OpusEncoder::SetBitrate(uint32_t bitrate)
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{
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requestedBitrate = bitrate;
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}
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void tgvoip::OpusEncoder::Encode(int16_t *data, size_t len)
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{
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if (requestedBitrate != currentBitrate)
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{
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opus_encoder_ctl(enc, OPUS_SET_BITRATE(requestedBitrate));
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currentBitrate = requestedBitrate;
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LOGV("opus_encoder: setting bitrate to %u", currentBitrate);
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}
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if (levelMeter)
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levelMeter->Update(data, len);
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if (secondaryEncoderEnabled != wasSecondaryEncoderEnabled)
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{
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wasSecondaryEncoderEnabled = secondaryEncoderEnabled;
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}
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int32_t r = opus_encode(enc, data, static_cast<int>(len), buffer, 4096);
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// int bw;
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// opus_encoder_ctl(enc, OPUS_GET_BANDWIDTH(&bw));
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// LOGV("Opus bandwidth: %d", bw);
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if (r <= 0)
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{
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LOGE("Error encoding: %d", r);
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}
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else if (r == 1)
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{
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LOGW("DTX");
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}
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else if (running)
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{
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//LOGV("Packet size = %d", r);
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int32_t secondaryLen = 0;
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unsigned char secondaryBuffer[128];
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if (secondaryEncoderEnabled && secondaryEncoder)
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{
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secondaryLen = opus_encode(secondaryEncoder, data, static_cast<int>(len), secondaryBuffer, sizeof(secondaryBuffer));
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//LOGV("secondaryLen %d", secondaryLen);
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}
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InvokeCallback(buffer, (size_t)r, secondaryBuffer, (size_t)secondaryLen);
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}
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}
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size_t tgvoip::OpusEncoder::Callback(unsigned char *data, size_t len, void *param)
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{
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assert(len == 960 * 2);
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OpusEncoder *e = (OpusEncoder *)param;
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try
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{
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Buffer buf = e->bufferPool.Get();
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buf.CopyFrom(data, 0, 960 * 2);
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e->queue.Put(std::move(buf));
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}
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catch (std::bad_alloc &x)
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{
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LOGW("opus_encoder: no buffer slots left");
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if (e->complexity > 1)
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{
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e->complexity--;
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opus_encoder_ctl(e->enc, OPUS_SET_COMPLEXITY(e->complexity));
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}
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}
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return 0;
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}
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uint32_t tgvoip::OpusEncoder::GetBitrate()
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{
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return requestedBitrate;
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}
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void tgvoip::OpusEncoder::SetEchoCanceller(EchoCanceller *aec)
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{
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echoCanceller = aec;
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}
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void tgvoip::OpusEncoder::RunThread()
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{
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uint32_t bufferedCount = 0;
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uint32_t packetsPerFrame = frameDuration / 20;
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LOGV("starting encoder, packets per frame=%d", packetsPerFrame);
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int16_t *frame;
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if (packetsPerFrame > 1)
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frame = (int16_t *)malloc(960 * 2 * packetsPerFrame);
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else
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frame = NULL;
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bool frameHasVoice = false;
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bool wasVadMode = false;
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while (running)
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{
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Buffer _packet = queue.GetBlocking();
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if (!_packet.IsEmpty())
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{
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int16_t *packet = (int16_t *)*_packet;
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bool hasVoice = true;
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if (echoCanceller)
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echoCanceller->ProcessInput(packet, 960, hasVoice);
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if (!postProcEffects.empty())
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{
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for (effects::AudioEffect *effect : postProcEffects)
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{
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effect->Process(packet, 960);
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}
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}
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if (packetsPerFrame == 1)
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{
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Encode(packet, 960);
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}
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else
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{
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memcpy(frame + (960 * bufferedCount), packet, 960 * 2);
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frameHasVoice = frameHasVoice || hasVoice;
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bufferedCount++;
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if (bufferedCount == packetsPerFrame)
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{
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if (vadMode)
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{
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if (frameHasVoice)
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{
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opus_encoder_ctl(enc, OPUS_SET_BITRATE(currentBitrate));
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if (secondaryEncoder)
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{
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opus_encoder_ctl(secondaryEncoder, OPUS_SET_BITRATE(currentBitrate));
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}
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}
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else
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{
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opus_encoder_ctl(enc, OPUS_SET_BITRATE(vadNoVoiceBitrate));
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if (secondaryEncoder)
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{
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opus_encoder_ctl(secondaryEncoder, OPUS_SET_BITRATE(vadNoVoiceBitrate));
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}
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}
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wasVadMode = true;
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}
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else if (wasVadMode)
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{
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wasVadMode = false;
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opus_encoder_ctl(enc, OPUS_SET_BITRATE(currentBitrate));
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if (secondaryEncoder)
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{
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opus_encoder_ctl(secondaryEncoder, OPUS_SET_BITRATE(currentBitrate));
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}
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}
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Encode(frame, 960 * packetsPerFrame);
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bufferedCount = 0;
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frameHasVoice = false;
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}
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}
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}
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else
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{
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break;
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}
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}
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if (frame)
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free(frame);
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}
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void tgvoip::OpusEncoder::SetOutputFrameDuration(uint32_t duration)
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{
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frameDuration = duration;
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}
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void tgvoip::OpusEncoder::SetPacketLoss(int percent)
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{
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packetLossPercent = std::min(20, percent);
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opus_encoder_ctl(enc, OPUS_SET_PACKET_LOSS_PERC(packetLossPercent));
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opus_encoder_ctl(enc, OPUS_SET_INBAND_FEC(percent > 0 && !secondaryEncoderEnabled ? 1 : 0));
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}
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int tgvoip::OpusEncoder::GetPacketLoss()
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{
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return packetLossPercent;
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}
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void tgvoip::OpusEncoder::SetDTX(bool enable)
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{
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opus_encoder_ctl(enc, OPUS_SET_DTX(enable ? 1 : 0));
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}
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void tgvoip::OpusEncoder::SetLevelMeter(tgvoip::AudioLevelMeter *levelMeter)
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{
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this->levelMeter = levelMeter;
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}
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void tgvoip::OpusEncoder::SetCallback(std::function<void(unsigned char *, size_t, unsigned char *, size_t)> f)
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{
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callback = f;
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}
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void tgvoip::OpusEncoder::InvokeCallback(unsigned char *data, size_t length, unsigned char *secondaryData, size_t secondaryLength)
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{
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callback(data, length, secondaryData, secondaryLength);
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}
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void tgvoip::OpusEncoder::SetSecondaryEncoderEnabled(bool enabled)
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{
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secondaryEncoderEnabled = enabled;
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}
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void tgvoip::OpusEncoder::SetVadMode(bool vad)
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{
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vadMode = vad;
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}
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void tgvoip::OpusEncoder::AddAudioEffect(effects::AudioEffect *effect)
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{
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postProcEffects.push_back(effect);
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}
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void tgvoip::OpusEncoder::RemoveAudioEffect(effects::AudioEffect *effect)
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{
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std::vector<effects::AudioEffect *>::iterator i = std::find(postProcEffects.begin(), postProcEffects.end(), effect);
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if (i != postProcEffects.end())
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postProcEffects.erase(i);
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}
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