{
assert(chains.size() > 0);
assert(chains.size() % 2 == 0);
- size_t chain_number = compute_chain_number_for_block(blocks.size() - 1);
+ bitset<256> disabled = find_disabled_blocks(size_t(-1));
+
+ size_t chain_number = compute_chain_number_for_block(blocks.size() - 1, disabled);
assert(chain_number < chains.size() / 2);
if (is_main_chain) {
chain_number += chains.size() / 2;
return chain_number;
}
-size_t Scene::compute_chain_number_for_block(size_t block_idx) const
+size_t Scene::compute_chain_number_for_block(size_t block_idx, const bitset<256> &disabled) const
{
Block *block = blocks[block_idx];
size_t chain_number;
+
+ size_t currently_chosen_alternative;
+ if (disabled.test(block_idx)) {
+ // It doesn't matter, so pick 0 as the canonical choice
+ // (this is the only one that is actually instantiated).
+ currently_chosen_alternative = 0;
+ } else {
+ currently_chosen_alternative = block->currently_chosen_alternative;
+ }
+ assert(currently_chosen_alternative < block->alternatives.size());
+
if (block_idx == 0) {
assert(block->cardinality_base == 1);
- chain_number = block->currently_chosen_alternative;
+ chain_number = currently_chosen_alternative;
} else {
- chain_number = compute_chain_number_for_block(block_idx - 1) + block->cardinality_base * block->currently_chosen_alternative;
+ chain_number = compute_chain_number_for_block(block_idx - 1, disabled) + block->cardinality_base * currently_chosen_alternative;
}
- assert(block->currently_chosen_alternative < int(block->alternatives.size()));
return chain_number;
}
+bitset<256> Scene::find_disabled_blocks(size_t chain_idx) const
+{
+ assert(blocks.size() < 256);
+
+ bitset<256> ret;
+ find_disabled_blocks(chain_idx, blocks.size() - 1, /*currently_disabled=*/false, &ret);
+ return ret;
+}
+
+void Scene::find_disabled_blocks(size_t chain_idx, size_t block_idx, bool currently_disabled, bitset<256> *disabled) const
+{
+ if (currently_disabled) {
+ disabled->set(block_idx);
+ }
+ Block *block = blocks[block_idx];
+ EffectType chosen_type = block->alternatives[block->chosen_alternative(chain_idx)]->effect_type;
+ for (size_t input_idx = 0; input_idx < block->inputs.size(); ++input_idx) {
+ if (chosen_type == IDENTITY_EFFECT && input_idx > 0) {
+ // Multi-input effect that has been replaced by
+ // IdentityEffect, so every effect but the first are
+ // disabled and will not participate in the chain.
+ find_disabled_blocks(chain_idx, block->inputs[input_idx], /*currently_disabled=*/true, disabled);
+ } else {
+ // Just keep on recursing down.
+ find_disabled_blocks(chain_idx, block->inputs[input_idx], currently_disabled, disabled);
+ }
+ }
+}
+
+bool Scene::is_noncanonical_chain(size_t chain_idx) const
+{
+ bitset<256> disabled = find_disabled_blocks(chain_idx);
+ if (disabled.none()) {
+ return false;
+ }
+ assert(blocks.size() < 256);
+ for (size_t block_idx = 0; block_idx < blocks.size(); ++block_idx) {
+ if (disabled.test(block_idx) && blocks[block_idx]->chosen_alternative(chain_idx) != 0) {
+ return true;
+ }
+ }
+ return false;
+}
+
int Scene::add_input(lua_State* L)
{
assert(lua_gettop(L) == 1 || lua_gettop(L) == 2);
assert(lua_gettop(L) >= 2);
Scene *scene = (Scene *)luaL_checkudata(L, 1, "Scene");
- // NOTE: We only support effects with a single parent, since that's what IdentityEffect does.
Block *block = new Block;
block->idx = scene->blocks.size();
// An IdentityEffect will be the alternative for when the effect is disabled.
block->alternatives.push_back(new EffectBlueprint(IDENTITY_EFFECT));
- block->inputs.push_back(scene->blocks.size() - 1);
+ find_inputs_for_block(L, scene, block);
scene->blocks.push_back(block);
return wrap_lua_existing_object_nonowned<Block>(L, "Block", block);
Effect *Scene::instantiate_effects(const Block *block, size_t chain_idx, Scene::Instantiation *instantiation)
{
+ // Find the chosen alternative for this block in this instance.
+ EffectType chosen_type = block->alternatives[block->chosen_alternative(chain_idx)]->effect_type;
+
vector<Effect *> inputs;
for (size_t input_idx : block->inputs) {
inputs.push_back(instantiate_effects(blocks[input_idx], chain_idx, instantiation));
- }
- // Find the chosen alternative for this block in this instance.
- EffectType chosen_type = block->alternatives[block->chosen_alternative(chain_idx)]->effect_type;
+ // As a special case, we allow IdentityEffect to take only one input
+ // even if the other alternative (or alternatives) is multi-input.
+ // Thus, even if there are more than one inputs, instantiate only
+ // the first one.
+ if (chosen_type == IDENTITY_EFFECT) {
+ break;
+ }
+ }
Effect *effect;
switch (chosen_type) {
}
const size_t cardinality = base;
- const size_t total_cardinality = cardinality * (only_one_mode ? 1 : 2);
+ size_t real_cardinality = 0;
+ for (size_t chain_idx = 0; chain_idx < cardinality; ++chain_idx) {
+ if (!scene->is_noncanonical_chain(chain_idx)) {
+ ++real_cardinality;
+ }
+ }
+ const size_t total_cardinality = real_cardinality * (only_one_mode ? 1 : 2);
if (total_cardinality > 200) {
print_warning(L, "The given Scene will instantiate %zu different versions. This will take a lot of time and RAM to compile; see if you could limit some options by e.g. locking the input type in some cases (by giving a fixed input to add_input()).\n",
total_cardinality);
Block *output_block = scene->blocks.back();
for (bool is_main_chain : { false, true }) {
for (size_t chain_idx = 0; chain_idx < cardinality; ++chain_idx) {
- if (only_one_mode && is_main_chain != chosen_mode) {
+ if ((only_one_mode && is_main_chain != chosen_mode) ||
+ scene->is_noncanonical_chain(chain_idx)) {
scene->chains.emplace_back();
continue;
}
// (directly to screen, RGBA) or live (Y'CbCr output).
#include <stddef.h>
+#include <bitset>
#include <functional>
#include <map>
#include <memory>
// Find the chosen alternative for this block in a given instance.
size_t chosen_alternative(size_t chain_idx) const {
- return (chain_idx / cardinality_base) % alternatives.size();
+ if (chain_idx == size_t(-1)) {
+ return currently_chosen_alternative;
+ } else {
+ return (chain_idx / cardinality_base) % alternatives.size();
+ }
}
std::vector<EffectBlueprint *> alternatives; // Must all have the same amount of inputs. Pointers to make things easier for Lua.
movit::ResourcePool *resource_pool;
movit::Effect *instantiate_effects(const Block *block, size_t chain_idx, Instantiation *instantiation);
- size_t compute_chain_number_for_block(size_t block_idx) const;
+ size_t compute_chain_number_for_block(size_t block_idx, const std::bitset<256> &disabled) const;
static void find_inputs_for_block(lua_State *L, Scene *scene, Block *block);
+ // Find out which blocks (indexed by position in the “blocks” array),
+ // if any, are disabled in a given instantiation. A disabled block is
+ // one that will not be instantiated at all, because it is a secondary
+ // (ie., not the first) input of some multi-input effect that was replaced
+ // with IdentityEffect in the given instantiation.
+ //
+ // Set chain_idx to size_t(-1) to use whatever is in each block's
+ // currently_chosen_alternative.
+ std::bitset<256> find_disabled_blocks(size_t chain_idx) const;
+ void find_disabled_blocks(size_t chain_idx, size_t block_idx, bool currently_disabled, std::bitset<256> *disabled) const;
+
+ // If a block is disabled, it should always have alternative 0 chosen,
+ // so that we don't instantiate a bunch of irrelevant duplicates that
+ // differ only in disabled blocks. You can check this property with
+ // is_noncanonical_chain() and then avoid instantiating the ones where
+ // it returns true.
+ bool is_noncanonical_chain(size_t chain_idx) const;
+
public:
Scene(Theme *theme, float aspect_nom, float aspect_denom);
size_t compute_chain_number(bool is_main_chain) const;
projects / nageru / commitdiff