/*we have no choice but always browsing the children, since a src can be replaced by a new one
without the parent being modified. We just collect the src and check against the current mixer inputs
to reset the mixer or not - the spec is not clear about that btw, shall rebuffering happen if a source is modified or not ...*/
static void audiobuffer_traverse(GF_Node *node, void *rs, Bool is_destroy)
{
u32 j;
Bool update_mixer;
GF_ChildNodeItem *l;
GF_AudioGroup *parent;
AudioBufferStack *st = (AudioBufferStack *)gf_node_get_private(node);
M_AudioBuffer *ab = (M_AudioBuffer *)node;
GF_TraverseState*tr_state = (GF_TraverseState*) rs;
if (is_destroy) {
gf_sc_audio_unregister(&st->output);
if (st->time_handle.is_registered)
gf_sc_unregister_time_node(st->output.compositor, &st->time_handle);
gf_mixer_del(st->am);
if (st->buffer) gf_free(st->buffer);
gf_list_del(st->new_inputs);
gf_free(st);
return;
}
parent = tr_state->audio_parent;
tr_state->audio_parent = (GF_AudioGroup *) st;
l = ab->children;
while (l) {
gf_node_traverse(l->node, tr_state);
l = l->next;
}
gf_mixer_lock(st->am, 1);
/*if no new inputs don't change mixer config*/
update_mixer = gf_list_count(st->new_inputs) ? 1 : 0;
if (gf_mixer_get_src_count(st->am) == gf_list_count(st->new_inputs)) {
u32 count = gf_list_count(st->new_inputs);
update_mixer = 0;
for (j=0; j<count; j++) {
GF_AudioInput *cur = (GF_AudioInput *)gf_list_get(st->new_inputs, j);
if (!gf_mixer_is_src_present(st->am, &cur->input_ifce)) {
update_mixer = 1;
break;
}
}
}
if (update_mixer) {
gf_mixer_remove_all(st->am);
gf_mixer_force_chanel_out(st->am, ab->numChan);
}
while (gf_list_count(st->new_inputs)) {
GF_AudioInput *src = (GF_AudioInput *)gf_list_get(st->new_inputs, 0);
gf_list_rem(st->new_inputs, 0);
if (update_mixer) gf_mixer_add_input(st->am, &src->input_ifce);
}
gf_mixer_lock(st->am, 0);
tr_state->audio_parent = parent;
/*Note the audio buffer is ALWAYS registered untill destroyed since buffer filling shall happen even when inactive*/
if (!st->output.register_with_parent || !st->output.register_with_renderer)
gf_sc_audio_register(&st->output, tr_state);
/*store mute flag*/
st->is_muted = tr_state->switched_off;
}
void gf_sc_ar_reset(GF_AudioRenderer *ar)
{
gf_mixer_remove_all(ar->mixer);
}
