mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-28 12:46:56 +00:00
107 lines
2.7 KiB
C++
107 lines
2.7 KiB
C++
/* ScummVM - Graphic Adventure Engine
|
|
*
|
|
* ScummVM is the legal property of its developers, whose names
|
|
* are too numerous to list here. Please refer to the COPYRIGHT
|
|
* file distributed with this source distribution.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* $URL$
|
|
* $Id$
|
|
*
|
|
*/
|
|
|
|
#include "sci/sfx/sfx_iterator.h"
|
|
#include "sci/tools.h" /* for BREAKPOINT */
|
|
#include "sci/sci_memory.h"
|
|
|
|
namespace Sci {
|
|
|
|
#define D ((pcm_data_internal_t *)self->internal)
|
|
|
|
static int pi_poll(sfx_pcm_feed_t *self, byte *dest, int size);
|
|
static void pi_destroy(sfx_pcm_feed_t *self);
|
|
|
|
struct pcm_data_internal_t {
|
|
byte *base_data;
|
|
byte *data;
|
|
int frames_left;
|
|
};
|
|
|
|
|
|
static sfx_pcm_feed_t pcm_it_prototype = {
|
|
pi_poll,
|
|
pi_destroy,
|
|
NULL, /* No timestamp getter */
|
|
NULL, /* Internal data goes here */
|
|
{0, 0, 0}, /* Must fill in configuration */
|
|
"song-iterator",
|
|
0, /* Ideally the resource number should go here */
|
|
0 /* The mixer computes this for us */
|
|
};
|
|
|
|
|
|
sfx_pcm_feed_t *sfx_iterator_make_feed(byte *base_data, int offset, int size, sfx_pcm_config_t conf) {
|
|
sfx_pcm_feed_t *feed;
|
|
pcm_data_internal_t *idat;
|
|
byte *data = base_data + offset;
|
|
|
|
if (!data) {
|
|
/* Now this is silly; why'd you call this function in the first place? */
|
|
return NULL;
|
|
}
|
|
sci_refcount_incref(base_data);
|
|
|
|
idat = (pcm_data_internal_t*)sci_malloc(sizeof(pcm_data_internal_t));
|
|
idat->base_data = base_data;
|
|
idat->data = data;
|
|
idat->frames_left = size;
|
|
feed = (sfx_pcm_feed_t*)sci_malloc(sizeof(sfx_pcm_feed_t));
|
|
*feed = pcm_it_prototype;
|
|
feed->internal = idat;
|
|
feed->conf = conf;
|
|
|
|
return feed;
|
|
}
|
|
|
|
|
|
static int pi_poll(sfx_pcm_feed_t *self, byte *dest, int size) {
|
|
int data_len;
|
|
|
|
if (size >= D->frames_left)
|
|
size = D->frames_left;
|
|
|
|
D->frames_left -= size;
|
|
|
|
data_len = size * self->frame_size;
|
|
|
|
memcpy(dest, D->data, data_len);
|
|
#if 0
|
|
memset(dest, 0xff, data_len);
|
|
#endif
|
|
|
|
D->data += data_len;
|
|
|
|
return size;
|
|
}
|
|
|
|
static void pi_destroy(sfx_pcm_feed_t *self) {
|
|
sci_refcount_decref(D->base_data);
|
|
free(D);
|
|
free(self);
|
|
}
|
|
|
|
} // End of namespace Sci
|