// Filter data through filter
static af_data_t* play(struct af_instance_s* af, af_data_t* data)
{
af_data_t* c = data; // Current working data
af_data_t* l = af->data; // Local data
af_channels_t* s = af->setup;
int i;
if(AF_OK != RESIZE_LOCAL_BUFFER(af,data))
return NULL;
// Reset unused channels
memset(l->audio,0,(c->len*af->mul.n)/af->mul.d);
if(AF_OK == check_routes(s,c->nch,l->nch))
for(i=0;i<s->nr;i++)
copy(c->audio,l->audio,c->nch,s->route[i][FR],
l->nch,s->route[i][TO],c->len,c->bps);
// Set output data
c->audio = l->audio;
c->len = (c->len*af->mul.n)/af->mul.d;
c->nch = l->nch;
return c;
}
// Initialization and runtime control
static int control(struct af_instance* af, int cmd, void* arg)
{
af_channels_t* s = af->priv;
switch(cmd){
case AF_CONTROL_REINIT: ;
struct mp_chmap chmap;
mp_chmap_set_unknown(&chmap, s->nch);
mp_audio_set_channels(af->data, &chmap);
// Set default channel assignment
if(!s->router){
int i;
// Make sure this filter isn't redundant
if(af->data->nch == ((struct mp_audio*)arg)->nch)
return AF_DETACH;
// If mono: fake stereo
if(((struct mp_audio*)arg)->nch == 1){
s->nr = MPMIN(af->data->nch,2);
for(i=0;i<s->nr;i++){
s->route[i][FR] = 0;
s->route[i][TO] = i;
}
}
else{
s->nr = MPMIN(af->data->nch, ((struct mp_audio*)arg)->nch);
for(i=0;i<s->nr;i++){
s->route[i][FR] = i;
s->route[i][TO] = i;
}
}
}
af->data->rate = ((struct mp_audio*)arg)->rate;
mp_audio_force_interleaved_format((struct mp_audio*)arg);
mp_audio_set_format(af->data, ((struct mp_audio*)arg)->format);
return check_routes(af,((struct mp_audio*)arg)->nch,af->data->nch);
}
return AF_UNKNOWN;
}
// Filter data through filter
static int filter(struct af_instance* af, struct mp_audio* data, int flags)
{
struct mp_audio* c = data; // Current working data
struct mp_audio* l = af->data; // Local data
af_channels_t* s = af->priv;
int i;
mp_audio_realloc_min(af->data, data->samples);
// Reset unused channels
memset(l->planes[0],0,mp_audio_psize(c) / c->nch * l->nch);
if(AF_OK == check_routes(af,c->nch,l->nch))
for(i=0;i<s->nr;i++)
copy(af, c->planes[0],l->planes[0],c->nch,s->route[i][FR],
l->nch,s->route[i][TO],mp_audio_psize(c),c->bps);
// Set output data
c->planes[0] = l->planes[0];
mp_audio_set_channels(c, &l->channels);
return 0;
}
// Initialization and runtime control
static int control(struct af_instance_s* af, int cmd, void* arg)
{
af_channels_t* s = af->setup;
switch(cmd){
case AF_CONTROL_REINIT:
// Set default channel assignment
if(!s->router){
int i;
// Make sure this filter isn't redundant
if(af->data->nch == ((af_data_t*)arg)->nch)
return AF_DETACH;
// If mono: fake stereo
if(((af_data_t*)arg)->nch == 1){
s->nr = min(af->data->nch,2);
for(i=0;i<s->nr;i++){
s->route[i][FR] = 0;
s->route[i][TO] = i;
}
}
else{
s->nr = min(af->data->nch, ((af_data_t*)arg)->nch);
for(i=0;i<s->nr;i++){
s->route[i][FR] = i;
s->route[i][TO] = i;
}
}
}
af->data->rate = ((af_data_t*)arg)->rate;
af->data->format = ((af_data_t*)arg)->format;
af->data->bps = ((af_data_t*)arg)->bps;
af->mul.n = af->data->nch;
af->mul.d = ((af_data_t*)arg)->nch;
af_frac_cancel(&af->mul);
return check_routes(s,((af_data_t*)arg)->nch,af->data->nch);
case AF_CONTROL_COMMAND_LINE:{
int nch = 0;
int n = 0;
// Check number of channels and number of routing pairs
sscanf(arg, "%i:%i%n", &nch, &s->nr, &n);
// If router scan commandline for routing pairs
if(s->nr){
char* cp = &((char*)arg)[n];
int ch = 0;
// Sanity check
if((s->nr < 1) || (s->nr > AF_NCH)){
af_msg(AF_MSG_ERROR,"[channels] The number of routing pairs must be"
" between 1 and %i. Current value is %i\n",AF_NCH,s->nr);
}
s->router = 1;
// Scan for pairs on commandline
while((*cp == ':') && (ch < s->nr)){
sscanf(cp, ":%i:%i%n" ,&s->route[ch][FR], &s->route[ch][TO], &n);
af_msg(AF_MSG_VERBOSE,"[channels] Routing from channel %i to"
" channel %i\n",s->route[ch][FR],s->route[ch][TO]);
cp = &cp[n];
ch++;
}
}
if(AF_OK != af->control(af,AF_CONTROL_CHANNELS | AF_CONTROL_SET ,&nch))
return AF_ERROR;
return AF_OK;
}
case AF_CONTROL_CHANNELS | AF_CONTROL_SET:
// Reinit must be called after this function has been called
// Sanity check
if(((int*)arg)[0] <= 0 || ((int*)arg)[0] > AF_NCH){
af_msg(AF_MSG_ERROR,"[channels] The number of output channels must be"
" between 1 and %i. Current value is %i\n",AF_NCH,((int*)arg)[0]);
return AF_ERROR;
}
af->data->nch=((int*)arg)[0];
if(!s->router)
af_msg(AF_MSG_VERBOSE,"[channels] Changing number of channels"
" to %i\n",af->data->nch);
return AF_OK;
case AF_CONTROL_CHANNELS | AF_CONTROL_GET:
*(int*)arg = af->data->nch;
return AF_OK;
case AF_CONTROL_CHANNELS_ROUTING | AF_CONTROL_SET:{
int ch = ((af_control_ext_t*)arg)->ch;
int* route = ((af_control_ext_t*)arg)->arg;
s->route[ch][FR] = route[FR];
s->route[ch][TO] = route[TO];
return AF_OK;
}
case AF_CONTROL_CHANNELS_ROUTING | AF_CONTROL_GET:{
int ch = ((af_control_ext_t*)arg)->ch;
int* route = ((af_control_ext_t*)arg)->arg;
route[FR] = s->route[ch][FR];
route[TO] = s->route[ch][TO];
return AF_OK;
}
case AF_CONTROL_CHANNELS_NR | AF_CONTROL_SET:
s->nr = *(int*)arg;
return AF_OK;
case AF_CONTROL_CHANNELS_NR | AF_CONTROL_GET:
*(int*)arg = s->nr;
return AF_OK;
case AF_CONTROL_CHANNELS_ROUTER | AF_CONTROL_SET:
s->router = *(int*)arg;
return AF_OK;
case AF_CONTROL_CHANNELS_ROUTER | AF_CONTROL_GET:
*(int*)arg = s->router;
return AF_OK;
}
return AF_UNKNOWN;
}
