Hey all I have been working on a simple VOIP app and have gotten my self
totally confused.
is this the right process to follow? Any tips examples guidence would be
super awesome.
I have my voice data. capturing.
I encoding it so that there are multi speex frames per packet.
on the reciving end i decode the package i recive.
Yeah it dosnt work at all. :D
this is the code for the encode.
int PackVoiceData(SpeexBits *bits,int space_avalible_in_packect, int
size_of_data_avalible, int frame_size , void * data_to_pack, char *
destinantion_buffer )
{
float frame[FRAME_SIZE];
int offset= 0;
float * data_as_floats;
short * data_as_shorts = (short *) data_to_pack;
memset(destinantion_buffer , 0,size_of_data_avalible);
/// memset(data_as_shorts , 0,size_of_data_avalible);
int number_of_frames;
/// clear the space each time.
int length = space_avalible_in_packect;
if ( size_of_data_avalible < space_avalible_in_packect )
{
length = size_of_data_avalible;
}
/// allocate space in memory for the float version of the data.
data_as_floats = (float *)calloc ( length, sizeof( float));
number_of_frames = length/FRAME_SIZE;
for(int i=0; i< length; i++ )
{
data_as_floats[i] = data_as_shorts[i];
}
/// if size of data avaliable is less than the space avaliable in the
packet figure
/// the number of frames from the data avaliable
speex_bits_reset( bits );
/// Call speex incode n times before writing the data stream.
for( int i =0 ; i < number_of_frames-1; i ++)
{
/// pack a frame
for(int j=0; j< FRAME_SIZE; j++ )
{
frame[j] = data_as_floats [j+offset];
}
// this enoced the data
speex_encode( encoder_state, frame , bits );
// increase the offset
offset+=FRAME_SIZE;
}
//speex_encode( encoder_state, frame , bits );
/// write teh stream out.
int bytes_to_write = speex_bits_nbytes( bits );
/// transform from float to char* to write. The termination code is
acutomatically added to teh end of the stream.
bytes_written = speex_bits_write( bits, destinantion_buffer,
bytes_to_write );
/// return the amount of data writtne.
printf( "bytes written %d\n" ,bytes_written );
return bytes_written;
}
and the decode. ...
int Decode( SpeexBits *bits, char * input_bits, int data_in_length , char *
output )
{
float * out_put = (float *)calloc( data_in_length,sizeof( float ) );
int number_of_frames = data_in_length/FRAME_SIZE;
int offset
for( int i = 0; i< number_of_frames; i++ )
{
// read the bits into the byte stream struct.
speex_bits_read_from( bits , input_bits, FRAME_SIZE );
// decode the data.
speex_decode( decoder_state, bits , out_put);
for( int i = 0; i < data_in_length; i++ )
{
output[i+offset] = out_put[i];
}
offset+=FRAME_SIZE;
}
/// change the floats to shorts so it can be used by the sound out put.
speex_bits_reset( bits );
}
my main loop just caputures and sends and then recives with a wait
function/poll of the open socket.
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