myvtm/Other/win/libaudioframework/audiodrivergroup.c

#include "precompile.h"
#include "audiodrivergroup.h"
#include "audioengine.h"

static void process_frame(void *self)
{
	int i;
	audiodrivergroup_t *group = CONTAINING_RECORD(self, audiodrivergroup_t, base);

	for (i = 0; i < group->arr_member->nelts; ++i) {
		audiodriver_t *drv = APR_ARRAY_IDX(group->arr_member, i, audiodriver_t*);
		(*drv->vtbl->process_frame)(drv);
	}
}

static audiodriver_vtbl_t g_driver_vtbl = {
	&process_frame,
};

apr_status_t audiodrivergroup_create(apr_pool_t *pool, audioengine_t *engine, audiodrivergroup_t **p_group)
{
	audiodrivergroup_t *group;
	group = apr_palloc(pool, sizeof(audiodrivergroup_t));
	memset(group, 0, sizeof(audiodrivergroup_t));
	group->arr_member = apr_array_make(pool, 3, sizeof(audiodriver_t*));
	audiodriver_init(engine, &g_driver_vtbl, &group->base);
	*p_group = group;
	return APR_SUCCESS;
}

apr_status_t audiodrivergroup_destroy(audiodrivergroup_t *group)
{
	return APR_SUCCESS;
}

apr_status_t audiodrivergroup_add_member(audiodrivergroup_t *group, audiodriver_t *member)
{
	if (!member)
		return APR_EINVAL;
	APR_ARRAY_PUSH(group->arr_member, audiodriver_t*) = member;
	return APR_SUCCESS;
}

apr_status_t audiodrivergroup_remove_member(audiodrivergroup_t *group, audiodriver_t *member)
{
	int i;
	if (!member)
		return APR_EINVAL;
	for (i = 0; i < group->arr_member->nelts; ++i) {
		audiodriver_t *t = APR_ARRAY_IDX(group->arr_member, i, audiodriver_t*);
		if (t == member) {
			if (i != group->arr_member->nelts-1) {
				APR_ARRAY_IDX(group->arr_member, i, audiodriver_t*) = APR_ARRAY_IDX(group->arr_member, i, audiodriver_t*);
				APR_ARRAY_IDX(group->arr_member, group->arr_member->nelts-1, audiodriver_t*) = t;
			}
			apr_array_pop(group->arr_member);
			return APR_SUCCESS;
		}
	}
	return APR_NOTFOUND;
}