static domain_pool_t *
alloc_qac_domain_pool (unsigned max_domains, unsigned max_edges,
const wfa_t *wfa)
/*
* Domain pool with state images {0, ..., 'max_domains').
* Underlying probability model: quasi arithmetic coding of columns.
*/
{
domain_pool_t *pool;
unsigned state;
pool = default_alloc ();
pool->model = qac_model_alloc (max_domains);
pool->generate = qac_generate;
pool->bits = qac_bits;
pool->update = qac_update;
pool->append = qac_append;
pool->chroma = qac_chroma;
pool->model_free = qac_model_free;
pool->model_duplicate = qac_model_duplicate;
for (state = 0; state < wfa->basis_states; state++)
if (usedomain (state, wfa))
qac_append (state, -1, wfa, pool->model);
return pool;
}
struct co_sched* co_sched_new(struct co_alloc* alloc)
{
if (!alloc) {
alloc = default_alloc();
}
struct co_sched* sched = (struct co_sched*)alloc->alloc(sizeof(struct co_sched));
sched->alloc = alloc;
memset(sched, 0, sizeof(struct co_sched));
}
static domain_pool_t *
alloc_empty_domain_pool (unsigned max_domains, unsigned max_edges,
const wfa_t *wfa)
/*
* Domain pool with no state images available.
*/
{
return default_alloc ();
}
static coeff_t *
alloc_uniform_coeff_model (rpf_t *rpf, rpf_t *dc_rpf,
unsigned min_level, unsigned max_level)
/*
* Underlying probability model: uniform distribution.
* I.e. each coefficient is written as such with
* (1 + exponent_bits + mantissa_bits) bits.
*/
{
coeff_t *coeff = default_alloc (rpf, dc_rpf, min_level, max_level);
coeff->bits = uniform_bits;
coeff->update = uniform_update;
return coeff;
}
static coeff_t *
alloc_aac_coeff_model (rpf_t *rpf, rpf_t *dc_rpf,
unsigned min_level, unsigned max_level)
/*
* Underlying probability model: adaptive arithmetic coding using
* the level of a range as context.
*/
{
coeff_t *coeff = default_alloc (rpf, dc_rpf, min_level, max_level);
coeff->bits = aac_bits;
coeff->update = aac_update;
coeff->model_free = aac_model_free;
coeff->model_duplicate = aac_model_duplicate;
coeff->model = aac_model_alloc (coeff);
return coeff;
}