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Add sequence reset after silence time. #2

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This commit is contained in:
Michał Słomkowski 2015-11-09 21:39:52 +01:00
parent a1bb86036c
commit a67dcedf0c
2 changed files with 39 additions and 8 deletions
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6
include/mumlib/Audio.hpp
View File

@ -4,6 +4,8 @@
#include <opus.h>
#include <chrono>
namespace mumlib {
constexpr int SAMPLE_RATE = 48000;
@ -32,6 +34,8 @@ namespace mumlib {
uint8_t *outputBuffer,
int outputBufferSize = MAX_UDP_LENGTH);
void resetEncoder();
private:
log4cpp::Category &logger;
@ -39,5 +43,7 @@ namespace mumlib {
OpusEncoder *opusEncoder;
int64_t outgoingSequenceNumber;
std::chrono::time_point<std::chrono::system_clock> lastEncodedAudioPacketTimestamp;
};
}

41
src/Audio.cpp
View File

@ -2,12 +2,13 @@
#include <boost/format.hpp>
static boost::posix_time::seconds RESET_SEQUENCE_NUMBER_INTERVAL(5);
mumlib::Audio::Audio()
:
logger(log4cpp::Category::getInstance("mumlib.Audio")),
opusDecoder(nullptr),
opusEncoder(nullptr),
outgoingSequenceNumber(1) {
: logger(log4cpp::Category::getInstance("mumlib.Audio")),
opusDecoder(nullptr),
opusEncoder(nullptr),
outgoingSequenceNumber(0) {
int error;
@ -22,6 +23,8 @@ mumlib::Audio::Audio()
}
opus_encoder_ctl(opusEncoder, OPUS_SET_VBR(0));
resetEncoder();
}
mumlib::Audio::~Audio() {
@ -89,8 +92,16 @@ int mumlib::Audio::decodeAudioPacket(AudioPacketType type,
int mumlib::Audio::encodeAudioPacket(int target, int16_t *inputPcmBuffer, int inputLength, uint8_t *outputBuffer,
int outputBufferSize) {
//if (!bPreviousVoice)
// opus_encoder_ctl(opusState, OPUS_RESET_STATE, NULL); //todo do something with it
using namespace std::chrono;
const int lastAudioPacketSentInterval = duration_cast<milliseconds>(
system_clock::now() - lastEncodedAudioPacketTimestamp).count();
if (lastAudioPacketSentInterval > RESET_SEQUENCE_NUMBER_INTERVAL.total_milliseconds() + 1000) {
logger.debug("Last audio packet was sent %d ms ago, resetting encoder.", lastAudioPacketSentInterval);
resetEncoder();
}
std::vector<uint8_t> header;
@ -118,7 +129,21 @@ int mumlib::Audio::encodeAudioPacket(int target, int16_t *inputPcmBuffer, int in
memcpy(outputBuffer, &header[0], header.size());
memcpy(outputBuffer + header.size(), tmpOpusBuffer, outputSize);
outgoingSequenceNumber += 2;
int incrementNumber = 100 * inputLength / SAMPLE_RATE;
outgoingSequenceNumber += incrementNumber;
lastEncodedAudioPacketTimestamp = std::chrono::system_clock::now();
return outputSize + header.size();
}
void mumlib::Audio::resetEncoder() {
int status = opus_encoder_ctl(opusEncoder, OPUS_RESET_STATE, nullptr);
if (status != OPUS_OK) {
throw AudioException((boost::format("failed to reset encoder: %s") % opus_strerror(status)).str());
}
outgoingSequenceNumber = 0;
}