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ZMV: Chapter seeking code completed. Onto integration!

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This commit is contained in:
n-a-c-h
2005-03-14 00:26:53 +00:00
parent 214929d111
commit 8404393e16
1 changed files with 86 additions and 0 deletions
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86
zsnes/src/zmovie.c
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@@ -443,6 +443,40 @@ size_t internal_chapter_pos(struct internal_chapter_buf *icb, size_t offset)
return(0); return(0);
} }
size_t internal_chapter_greater(struct internal_chapter_buf *icb, size_t offset)
{
size_t greater = ~0;
do
{
unsigned char i;
for (i = 0; i < icb->used; i++)
{
if ((icb->offsets[i] > offset) && (icb->offsets[i] < greater))
{
greater = icb->offsets[i];
}
}
} while ((icb = icb->next));
return((greater == ~0) ? offset : greater);
}
size_t internal_chapter_lesser(struct internal_chapter_buf *icb, size_t offset)
{
size_t lesser = 0;
do
{
unsigned char i;
for (i = 0; i < icb->used; i++)
{
if ((icb->offsets[i] < offset) && (icb->offsets[i] > lesser))
{
lesser = icb->offsets[i];
}
}
} while ((icb = icb->next));
return((lesser == 0) ? offset : lesser);
}
/* /*
Shared var between record/replay functions Shared var between record/replay functions
@@ -699,12 +733,64 @@ void zmv_replay()
void zmv_next_chapter() void zmv_next_chapter()
{ {
size_t current_loc = ftell(zmv_vars.fp);
size_t next_internal = internal_chapter_greater(&zmv_vars.internal_chapters, current_loc);
size_t next_external = internal_chapter_greater(&zmv_open_vars.external_chapters, current_loc);
size_t next = (next_internal < next_external) ? next_internal : next_external;
if (next != current_loc)
{
if (next == next_internal)
{
fseek(zmv_vars.fp, next_internal, SEEK_SET);
zst_load(zmv_vars.fp);
zmv_open_vars.frames_replayed = fread4(zmv_vars.fp);
}
else
{
size_t ext_chapter_loc = zmv_open_vars.external_chapter_count;
ext_chapter_loc -= internal_chapter_pos(&zmv_open_vars.external_chapters, next);
ext_chapter_loc *= (cur_zst_size+8);
ext_chapter_loc += 2;
fseek(zmv_vars.fp, -(ext_chapter_loc), SEEK_END);
zst_load(zmv_vars.fp);
zmv_open_vars.frames_replayed = fread4(zmv_vars.fp);
fseek(zmv_vars.fp, next_external, SEEK_SET);
}
}
} }
void zmv_prev_chapter() void zmv_prev_chapter()
{ {
size_t current_loc = ftell(zmv_vars.fp);
size_t prev_internal = internal_chapter_lesser(&zmv_vars.internal_chapters, current_loc);
size_t prev_external = internal_chapter_lesser(&zmv_open_vars.external_chapters, current_loc);
size_t prev = (prev_internal > prev_external) ? prev_internal : prev_external;
if (prev != current_loc)
{
if (prev == prev_internal)
{
fseek(zmv_vars.fp, prev_internal, SEEK_SET);
zst_load(zmv_vars.fp);
zmv_open_vars.frames_replayed = fread4(zmv_vars.fp);
}
else
{
size_t ext_chapter_loc = zmv_open_vars.external_chapter_count;
ext_chapter_loc -= internal_chapter_pos(&zmv_open_vars.external_chapters, prev);
ext_chapter_loc *= (cur_zst_size+8);
ext_chapter_loc += 2;
fseek(zmv_vars.fp, -(ext_chapter_loc), SEEK_END);
zst_load(zmv_vars.fp);
zmv_open_vars.frames_replayed = fread4(zmv_vars.fp);
fseek(zmv_vars.fp, prev_external, SEEK_SET);
}
}
} }
void zmv_add_chapter() void zmv_add_chapter()