/*
=====================
CL_ParseVoip
A VoIP message has been received from the server
=====================
*/
static
void CL_ParseVoip( msg_t *msg )
{
static short decoded[ 4096 ]; // !!! FIXME: don't hardcode.
const int sender = MSG_ReadShort( msg );
const int generation = MSG_ReadByte( msg );
const int sequence = MSG_ReadLong( msg );
const int frames = MSG_ReadByte( msg );
const int packetsize = MSG_ReadShort( msg );
const int flags = MSG_ReadBits( msg, VOIP_FLAGCNT );
char encoded[ 1024 ];
int seqdiff = sequence - clc.voipIncomingSequence[ sender ];
int written = 0;
int i;
Com_DPrintf( "VoIP: %d-byte packet from client %d\n", packetsize, sender );
if ( sender < 0 )
{
return; // short/invalid packet, bail.
}
else if ( generation < 0 )
{
return; // short/invalid packet, bail.
}
else if ( sequence < 0 )
{
return; // short/invalid packet, bail.
}
else if ( frames < 0 )
{
return; // short/invalid packet, bail.
}
else if ( packetsize < 0 )
{
return; // short/invalid packet, bail.
}
if ( packetsize > sizeof( encoded ) ) // overlarge packet?
{
int bytesleft = packetsize;
while ( bytesleft )
{
int br = bytesleft;
if ( br > sizeof( encoded ) )
{
br = sizeof( encoded );
}
MSG_ReadData( msg, encoded, br );
bytesleft -= br;
}
return; // overlarge packet, bail.
}
if ( !clc.speexInitialized )
{
MSG_ReadData( msg, encoded, packetsize ); // skip payload.
return; // can't handle VoIP without libspeex!
}
else if ( sender >= MAX_CLIENTS )
{
MSG_ReadData( msg, encoded, packetsize ); // skip payload.
return; // bogus sender.
}
else if ( CL_ShouldIgnoreVoipSender( sender ) )
{
MSG_ReadData( msg, encoded, packetsize ); // skip payload.
return; // Channel is muted, bail.
}
// !!! FIXME: make sure data is narrowband? Does decoder handle this?
Com_DPrintf( "VoIP: packet accepted!\n" );
// This is a new "generation" ... a new recording started, reset the bits.
if ( generation != clc.voipIncomingGeneration[ sender ] )
{
Com_DPrintf( "VoIP: new generation %d!\n", generation );
speex_bits_reset( &clc.speexDecoderBits[ sender ] );
clc.voipIncomingGeneration[ sender ] = generation;
seqdiff = 0;
}
else if ( seqdiff < 0 ) // we're ahead of the sequence?!
{
// This shouldn't happen unless the packet is corrupted or something.
Com_DPrintf( "VoIP: misordered sequence! %d < %d!\n",
sequence, clc.voipIncomingSequence[ sender ] );
// reset the bits just in case.
speex_bits_reset( &clc.speexDecoderBits[ sender ] );
seqdiff = 0;
}
else if ( seqdiff > 100 ) // more than 2 seconds of audio dropped?
{
// just start over.
Com_DPrintf( "VoIP: Dropped way too many (%d) frames from client #%d\n",
seqdiff, sender );
speex_bits_reset( &clc.speexDecoderBits[ sender ] );
seqdiff = 0;
}
if ( seqdiff != 0 )
{
Com_DPrintf( "VoIP: Dropped %d frames from client #%d\n",
seqdiff, sender );
// tell speex that we're missing frames...
for ( i = 0; i < seqdiff; i++ )
{
assert( ( written + clc.speexFrameSize ) * 2 < sizeof( decoded ) );
speex_decode_int( clc.speexDecoder[ sender ], NULL, decoded + written );
written += clc.speexFrameSize;
}
}
for ( i = 0; i < frames; i++ )
{
const int len = MSG_ReadByte( msg );
if ( len < 0 )
{
Com_DPrintf( "VoIP: Short packet!\n" );
break;
}
MSG_ReadData( msg, encoded, len );
// shouldn't happen, but just in case...
if ( ( written + clc.speexFrameSize ) * 2 > sizeof( decoded ) )
{
Com_DPrintf( "VoIP: playback %d bytes, %d samples, %d frames\n",
written * 2, written, i );
CL_PlayVoip( sender, written, ( const byte * ) decoded, flags );
written = 0;
}
speex_bits_read_from( &clc.speexDecoderBits[ sender ], encoded, len );
speex_decode_int( clc.speexDecoder[ sender ],
&clc.speexDecoderBits[ sender ], decoded + written );
#if 0
static FILE *encio = NULL;
if ( encio == NULL ) { encio = fopen( "voip-incoming-encoded.bin", "wb" ); }
if ( encio != NULL ) { fwrite( encoded, len, 1, encio ); fflush( encio ); }
static FILE *decio = NULL;
if ( decio == NULL ) { decio = fopen( "voip-incoming-decoded.bin", "wb" ); }
if ( decio != NULL ) { fwrite( decoded + written, clc.speexFrameSize * 2, 1, decio ); fflush( decio ); }
#endif
written += clc.speexFrameSize;
}
Com_DPrintf( "VoIP: playback %d bytes, %d samples, %d frames\n",
written * 2, written, i );
if ( written > 0 )
{
CL_PlayVoip( sender, written, ( const byte * ) decoded, flags );
}
clc.voipIncomingSequence[ sender ] = sequence + frames;
}
/*
=====================
CL_ParseVoip
A VoIP message has been received from the server
=====================
*/
static
void CL_ParseVoip ( msg_t *msg, qboolean ignoreData ) {
static short decoded[VOIP_MAX_PACKET_SAMPLES*4]; // !!! FIXME: don't hard code
const int sender = MSG_ReadShort(msg);
const int generation = MSG_ReadByte(msg);
const int sequence = MSG_ReadLong(msg);
const int frames = MSG_ReadByte(msg);
const int packetsize = MSG_ReadShort(msg);
const int flags = MSG_ReadBits(msg, VOIP_FLAGCNT);
unsigned char encoded[4000];
int numSamples;
int seqdiff;
int written = 0;
int i;
Com_DPrintf("VoIP: %d-byte packet from client %d\n", packetsize, sender);
if (sender < 0)
return; // short/invalid packet, bail.
else if (generation < 0)
return; // short/invalid packet, bail.
else if (sequence < 0)
return; // short/invalid packet, bail.
else if (frames < 0)
return; // short/invalid packet, bail.
else if (packetsize < 0)
return; // short/invalid packet, bail.
if (packetsize > sizeof (encoded)) { // overlarge packet?
int bytesleft = packetsize;
while (bytesleft) {
int br = bytesleft;
if (br > sizeof (encoded))
br = sizeof (encoded);
MSG_ReadData(msg, encoded, br);
bytesleft -= br;
}
return; // overlarge packet, bail.
}
MSG_ReadData(msg, encoded, packetsize);
if (ignoreData) {
return; // just ignore legacy speex voip data
} else if (!clc.voipCodecInitialized) {
return; // can't handle VoIP without libopus!
} else if (sender >= MAX_CLIENTS) {
return; // bogus sender.
} else if (CL_ShouldIgnoreVoipSender(sender)) {
return; // Channel is muted, bail.
}
// !!! FIXME: make sure data is narrowband? Does decoder handle this?
Com_DPrintf("VoIP: packet accepted!\n");
seqdiff = sequence - clc.voipIncomingSequence[sender];
// This is a new "generation" ... a new recording started, reset the bits.
if (generation != clc.voipIncomingGeneration[sender]) {
Com_DPrintf("VoIP: new generation %d!\n", generation);
opus_decoder_ctl(clc.opusDecoder[sender], OPUS_RESET_STATE);
clc.voipIncomingGeneration[sender] = generation;
seqdiff = 0;
} else if (seqdiff < 0) { // we're ahead of the sequence?!
// This shouldn't happen unless the packet is corrupted or something.
Com_DPrintf("VoIP: misordered sequence! %d < %d!\n",
sequence, clc.voipIncomingSequence[sender]);
// reset the decoder just in case.
opus_decoder_ctl(clc.opusDecoder[sender], OPUS_RESET_STATE);
seqdiff = 0;
} else if (seqdiff * VOIP_MAX_PACKET_SAMPLES*2 >= sizeof (decoded)) { // dropped more than we can handle?
// just start over.
Com_DPrintf("VoIP: Dropped way too many (%d) frames from client #%d\n",
seqdiff, sender);
opus_decoder_ctl(clc.opusDecoder[sender], OPUS_RESET_STATE);
seqdiff = 0;
}
if (seqdiff != 0) {
Com_DPrintf("VoIP: Dropped %d frames from client #%d\n",
seqdiff, sender);
// tell opus that we're missing frames...
for (i = 0; i < seqdiff; i++) {
assert((written + VOIP_MAX_PACKET_SAMPLES) * 2 < sizeof (decoded));
numSamples = opus_decode(clc.opusDecoder[sender], NULL, 0, decoded + written, VOIP_MAX_PACKET_SAMPLES, 0);
if ( numSamples <= 0 ) {
Com_DPrintf("VoIP: Error decoding frame %d from client #%d\n", i, sender);
continue;
}
written += numSamples;
}
}
numSamples = opus_decode(clc.opusDecoder[sender], encoded, packetsize, decoded + written, ARRAY_LEN(decoded) - written, 0);
if ( numSamples <= 0 ) {
Com_DPrintf("VoIP: Error decoding voip data from client #%d\n", sender);
numSamples = 0;
}
#if 0
static FILE *encio = NULL;
if (encio == NULL) encio = fopen("voip-incoming-encoded.bin", "wb");
if (encio != NULL) { fwrite(encoded, len, 1, encio); fflush(encio); }
static FILE *decio = NULL;
if (decio == NULL) decio = fopen("voip-incoming-decoded.bin", "wb");
if (decio != NULL) { fwrite(decoded+written, clc.speexFrameSize*2, 1, decio); fflush(decio); }
#endif
written += numSamples;
Com_DPrintf("VoIP: playback %d bytes, %d samples, %d frames\n",
written * 2, written, frames);
if(written > 0)
CL_PlayVoip(sender, written, (const byte *) decoded, flags);
clc.voipIncomingSequence[sender] = sequence + frames;
}