void hb_buffer_reduce( hb_buffer_t * b, int size )
{
if ( size < b->alloc / 8 || b->data == NULL )
{
hb_buffer_t * tmp = hb_buffer_init( size );
hb_buffer_swap_copy( b, tmp );
memcpy( b->data, tmp->data, size );
hb_buffer_close( &tmp );
}
}
void hb_srt_to_ssa(hb_buffer_t *sub_in, int line)
{
if (sub_in->size == 0)
return;
// null terminate input if not already terminated
if (sub_in->data[sub_in->size-1] != 0)
{
hb_buffer_realloc(sub_in, ++sub_in->size);
sub_in->data[sub_in->size - 1] = 0;
}
char * srt = (char*)sub_in->data;
// SSA markup expands a little over SRT, so allocate a bit of extra
// space. More will be realloc'd if needed.
hb_buffer_t * sub = hb_buffer_init(sub_in->size + 80);
char * ssa, *ssa_markup;
int skip, len, pos, ii;
// Exchange data between input sub and new ssa_sub
// After this, sub_in contains ssa data
hb_buffer_swap_copy(sub_in, sub);
ssa = (char*)sub_in->data;
sprintf((char*)sub_in->data, "%d,,Default,,0,0,0,,", line);
pos = strlen((char*)sub_in->data);
ii = 0;
while (srt[ii] != '\0')
{
if ((ssa_markup = srt_markup_to_ssa(srt + ii, &skip)) != NULL)
{
len = strlen(ssa_markup);
hb_buffer_realloc(sub_in, pos + len + 1);
// After realloc, sub_in->data may change
ssa = (char*)sub_in->data;
sprintf(ssa + pos, "%s", ssa_markup);
free(ssa_markup);
pos += len;
ii += skip;
}
else
{
hb_buffer_realloc(sub_in, pos + 4);
// After realloc, sub_in->data may change
ssa = (char*)sub_in->data;
if (srt[ii] == '\r')
{
ssa[pos++] = '\\';
ssa[pos++] = 'N';
ii++;
if (srt[ii] == '\n')
{
ii++;
}
}
else if (srt[ii] == '\n')
{
ssa[pos++] = '\\';
ssa[pos++] = 'N';
ii++;
}
else
{
ssa[pos++] = srt[ii++];
}
}
}
ssa[pos] = '\0';
sub_in->size = pos + 1;
hb_buffer_close(&sub);
}
