void kiss_fft_stride(kiss_fft_cfg st,const kiss_fft_cpx *fin,kiss_fft_cpx *fout,int in_stride)
{
if (fin == fout) {
CHECKBUF(tmpbuf,ntmpbuf,st->nfft);
kf_work(tmpbuf,fin,1,in_stride, st->factors,st);
speex_move(fout,tmpbuf,sizeof(kiss_fft_cpx)*st->nfft);
}else{
kf_work( fout, fin, 1,in_stride, st->factors,st );
}
}
SpeexHeader *speex_packet_to_header(char *packet, int size)
{
int i;
SpeexHeader *le_header;
const char *h = "Speex ";
for (i=0;i<8;i++)
if (packet[i]!=h[i])
{
speex_warning ("This doesn't look like a Speex file");
return NULL;
}
/*FIXME: Do we allow larger headers?*/
if (size < (int)sizeof(SpeexHeader))
{
speex_warning("Speex header too small");
return NULL;
}
le_header = (SpeexHeader*)speex_alloc(sizeof(SpeexHeader));
speex_move(le_header, packet, sizeof(SpeexHeader));
/*Make sure everything is converted correctly from little-endian*/
ENDIAN_SWITCH(le_header->speex_version_id);
ENDIAN_SWITCH(le_header->header_size);
ENDIAN_SWITCH(le_header->rate);
ENDIAN_SWITCH(le_header->mode);
ENDIAN_SWITCH(le_header->mode_bitstream_version);
ENDIAN_SWITCH(le_header->nb_channels);
ENDIAN_SWITCH(le_header->bitrate);
ENDIAN_SWITCH(le_header->frame_size);
ENDIAN_SWITCH(le_header->vbr);
ENDIAN_SWITCH(le_header->frames_per_packet);
ENDIAN_SWITCH(le_header->extra_headers);
return le_header;
}
char *speex_header_to_packet(SpeexHeader *header, int *size)
{
SpeexHeader *le_header;
le_header = (SpeexHeader*)speex_alloc(sizeof(SpeexHeader));
speex_move(le_header, header, sizeof(SpeexHeader));
/*Make sure everything is now little-endian*/
ENDIAN_SWITCH(le_header->speex_version_id);
ENDIAN_SWITCH(le_header->header_size);
ENDIAN_SWITCH(le_header->rate);
ENDIAN_SWITCH(le_header->mode);
ENDIAN_SWITCH(le_header->mode_bitstream_version);
ENDIAN_SWITCH(le_header->nb_channels);
ENDIAN_SWITCH(le_header->bitrate);
ENDIAN_SWITCH(le_header->frame_size);
ENDIAN_SWITCH(le_header->vbr);
ENDIAN_SWITCH(le_header->frames_per_packet);
ENDIAN_SWITCH(le_header->extra_headers);
*size = sizeof(SpeexHeader);
return (char *)le_header;
}