int construction::adjusted_time() const
{
int final_time = time;
int assistants = 0;
for( auto &elem : g->u.get_crafting_helpers() ) {
if( elem->get_skill_level( skill ) >= difficulty ) {
assistants++;
}
}
if( assistants >= 2 ) {
final_time *= 0.4f;
} else if( assistants == 1 ) {
final_time *= 0.75f;
}
final_time *= time_scale();
return final_time;
}
u_int32_t AmAdaptivePlayout::read(u_int32_t ts, int16_t* buf, u_int32_t len)
{
bool do_plc=false;
if(ts_less()(w_ts,ts+len) && (plc_cnt < 6)){
if(!plc_cnt){
int nlen = time_scale(w_ts-len,2.0, len);
wsola_off += nlen-len;
}
else {
do_plc = true;
}
plc_cnt++;
}
if(do_plc){
short plc_buf[FRAMESZ];
for(unsigned int i=0; i<len/FRAMESZ; i++){
fec.dofe(plc_buf);
buffer_put(w_ts,plc_buf,FRAMESZ);
}
buffer_get(ts,buf,len);
}
else {
buffer_get(ts,buf,len);
for(unsigned int i=0; i<len/FRAMESZ; i++)
fec.addtohistory(buf + i*FRAMESZ);
}
return len;
}
void AmAdaptivePlayout::write(u_int32_t ref_ts, u_int32_t ts,
int16_t* buf, u_int32_t len)
{
// predict next delay
u_int32_t p_delay = next_delay(ref_ts,ts);
u_int32_t old_off = wsola_off;
ts += old_off;
if(short_scaled.mean() > 2.0){
if(shr_threshold < 3000)
shr_threshold += 10;
}
else if(short_scaled.mean() < 1.0){
if(shr_threshold > 100)
shr_threshold -= 2;
}
// need to scale?
if( ts_less()(wsola_off+EXP_THRESHOLD,p_delay) || // expand packet
ts_less()(p_delay+shr_threshold,wsola_off) ) { // shrink packet
wsola_off = p_delay;
}
else {
if(ts_less()(r_ts,ts+len)){
plc_cnt = 0;
buffer_put(ts,buf,len);
}
else {
// lost
}
// statistics
short_scaled.push(0.0);
return;
}
int32_t n_len = len + wsola_off - old_off;
if(n_len < 0)
n_len = 1;
float f = float(n_len) / float(len);
if(f > TSM_MAX_SCALE)
f = TSM_MAX_SCALE;
n_len = (int32_t)(float(len) * f);
if(ts_less()(ts+n_len,r_ts)){
// statistics
short_scaled.push(0.0);
return;
}
u_int32_t old_wts = w_ts;
buffer_put(ts,buf,len);
n_len = time_scale(ts,f,len);
wsola_off = old_off + n_len - len;
//ts += n_len - len;
if(w_ts != old_wts)
plc_cnt = 0;
// statistics
short_scaled.push(100.0);
}
int main(int argc, char *argv[])
{
AFfilehandle inhandle;
AFfilehandle outhandle;
AFfilesetup filesetup;
int frames;
int new_frames;
int out_frames;
int count;
time_scale_t state;
float x;
float rate;
int16_t in[BLOCK_LEN];
int16_t out[5*BLOCK_LEN];
if ((inhandle = afOpenFile(IN_FILE_NAME, "r", 0)) == AF_NULL_FILEHANDLE)
{
printf(" Cannot open wave file '%s'\n", IN_FILE_NAME);
exit(2);
}
if ((x = afGetFrameSize(inhandle, AF_DEFAULT_TRACK, 1)) != 2.0)
{
printf(" Unexpected frame size in wave file '%s'\n", IN_FILE_NAME);
exit(2);
}
if ((x = afGetRate(inhandle, AF_DEFAULT_TRACK)) != (float) SAMPLE_RATE)
{
printf(" Unexpected sample rate in wave file '%s'\n", IN_FILE_NAME);
exit(2);
}
if ((x = afGetChannels(inhandle, AF_DEFAULT_TRACK)) != 1.0)
{
printf(" Unexpected number of channels in wave file '%s'\n", IN_FILE_NAME);
exit(2);
}
if ((filesetup = afNewFileSetup()) == AF_NULL_FILESETUP)
{
fprintf(stderr, " Failed to create file setup\n");
exit(2);
}
afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
afInitFileFormat(filesetup, AF_FILE_WAVE);
afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
if ((outhandle = afOpenFile(OUT_FILE_NAME, "w", filesetup)) == AF_NULL_FILEHANDLE)
{
fprintf(stderr, " Cannot create wave file '%s'\n", OUT_FILE_NAME);
exit(2);
}
rate = 1.8;
time_scale_init(&state, rate);
count = 0;
while ((frames = afReadFrames(inhandle, AF_DEFAULT_TRACK, in, BLOCK_LEN)))
{
new_frames = time_scale(&state, out, in, frames);
out_frames = afWriteFrames(outhandle, AF_DEFAULT_TRACK, out, new_frames);
if (out_frames != new_frames)
{
fprintf(stderr, " Error writing wave file\n");
exit(2);
}
if (++count > 100)
{
if (rate > 0.5)
{
rate -= 0.1;
if (rate >= 0.99 && rate <= 1.01)
rate -= 0.1;
printf("Rate is %f\n", rate);
time_scale_init(&state, rate);
}
count = 0;
}
}
if (afCloseFile(inhandle) != 0)
{
printf(" Cannot close wave file '%s'\n", IN_FILE_NAME);
exit(2);
}
if (afCloseFile(outhandle) != 0)
{
printf(" Cannot close wave file '%s'\n", OUT_FILE_NAME);
exit(2);
}
afFreeFileSetup(filesetup);
return 0;
}
