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Refactor extra binary blob tracks to not use STL data marshalling

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Just like I refactored text splitting to no longer use std::vectors,
std::strings, or temporary heap allocations, decreasing memory usage and
improving performance; there's no reason to use a temporary
heap-allocated std::vector to grab all extra binary blob indices, when
instead the iteration can just be more immediate.

Instead, what I've done is replaced binaryBlob::getExtra() with
binaryBlob::nextExtra(), which takes in a pointer to an index variable,
and will increment the index variable until it reaches an extra track.
After the caller processes the extra track, it is the caller's
responsibility to increment the variable again before passing it back to
getExtra().

This avoids all heap allocations and brings down the memory usage of
processing extra tracks.
This commit is contained in:
Misa 2021-02-17 23:48:41 -08:00 committed by Ethan Lee
parent 7a02f174ac
commit 141181dee7
3 changed files with 21 additions and 15 deletions
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20
desktop_version/src/BinaryBlob.cpp
View file

@ -181,18 +181,24 @@ char* binaryBlob::getAddress(int _index)
return m_memblocks[_index];
}
std::vector<int> binaryBlob::getExtra()
bool binaryBlob::nextExtra(size_t* start)
{
std::vector<int> result;
for (size_t i = 0; i < SDL_arraysize(m_headers); i += 1)
size_t* idx;
if (start == NULL)
{
if (m_headers[i].valid
#define FOREACH_TRACK(_, track_name) && SDL_strcmp(m_headers[i].name, track_name) != 0
return false;
}
for (idx = start; *idx < SDL_arraysize(m_headers); *idx += 1)
{
if (m_headers[*idx].valid
#define FOREACH_TRACK(_, track_name) && SDL_strcmp(m_headers[*idx].name, track_name) != 0
TRACK_NAMES(_)
#undef FOREACH_TRACK
) {
result.push_back(i);
return true;
}
}
return result;
return false;
}

4
desktop_version/src/BinaryBlob.h
View file

@ -1,7 +1,7 @@
#ifndef BINARYBLOB_H
#define BINARYBLOB_H
#include <vector>
#include <stddef.h>
/* Laaaazyyyyyyy -flibit */
// #define VVV_COMPILEMUSIC
@ -49,7 +49,7 @@ public:
int getSize(int _index);
std::vector<int> getExtra();
bool nextExtra(size_t* start);
char* getAddress(int _index);

12
desktop_version/src/Music.cpp
View file

@ -107,14 +107,14 @@ void musicclass::init()
num_mmmmmm_tracks += musicTracks.size();
const std::vector<int> extra = mmmmmm_blob.getExtra();
for (size_t i = 0; i < extra.size(); i++)
size_t index_ = 0;
while (mmmmmm_blob.nextExtra(&index_))
{
const int& index_ = extra[i];
rw = SDL_RWFromMem(mmmmmm_blob.getAddress(index_), mmmmmm_blob.getSize(index_));
musicTracks.push_back(MusicTrack( rw ));
num_mmmmmm_tracks++;
index_++;
}
bool ohCrap = pppppp_blob.unPackBinary("vvvvvvmusic.vvv");
@ -130,14 +130,14 @@ void musicclass::init()
num_pppppp_tracks += musicTracks.size() - num_mmmmmm_tracks;
const std::vector<int> extra = pppppp_blob.getExtra();
for (size_t i = 0; i < extra.size(); i++)
size_t index_ = 0;
while (pppppp_blob.nextExtra(&index_))
{
const int& index_ = extra[i];
rw = SDL_RWFromMem(pppppp_blob.getAddress(index_), pppppp_blob.getSize(index_));
musicTracks.push_back(MusicTrack( rw ));
num_pppppp_tracks++;
index_++;
}
}