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/*
* Copyright (C) 2002,2003 Pascal Haakmat.
* Licensed under the GNU GPL.
* Absolutely no warranty.
*/
#ifndef ITERATOR_H
#define ITERATOR_H
#include <gdk/gdk.h>
#include <config.h>
#include "mem.h"
#include "audiofile.h"
extern int quit_requested;
/*
* Some macros to iterate over a track in steps of EFFECT_BUF_SIZE.
*/
#define ITERATOR_GENERIC_INIT(frame_offset, frame_count) \
AFframecount iter_read = 0, \
iter_written = 0, \
iter_frame_offset = (frame_offset), \
iter_frame_count = 0, \
iter_frames_processed = 0, \
iter_frame_count_old = iter_frame_count = (frame_count); \
int iter_escape = 0, \
iter_is_last_iteration = 0
#define ITERATOR_INIT(frame_offset, frame_count) \
ITERATOR_GENERIC_INIT(frame_offset, frame_count); \
int32_t *int32_frame_bits = mem_alloc(EFFECT_BUF_SIZE * sizeof(int32_t))
#define ITERATORF_INIT(frame_offset, frame_count) \
ITERATOR_GENERIC_INIT(frame_offset, frame_count); \
float *float_frame_bits = mem_alloc(EFFECT_BUF_SIZE * sizeof(float))
#define ITERATOR_EXIT() \
if(int32_frame_bits) \
free(int32_frame_bits);
#define ITERATORF_EXIT() \
if(float_frame_bits) \
free(float_frame_bits);
#define ITERATOR_ESCAPE() \
iter_escape = 1;
#define ITERATOR_READER(shl, track) \
do { \
iter_read = track_int32_frames_get((track), \
int32_frame_bits, \
iter_frame_offset, \
MIN(EFFECT_BUF_SIZE, \
iter_frame_count)); \
if(iter_read <= 0) \
ITERATOR_ESCAPE(); \
if(iter_read < EFFECT_BUF_SIZE) \
iter_is_last_iteration = 1; \
iter_written = iter_read; \
} while(0)
#define ITERATORF_READER(shl, track) \
do { \
iter_read = track_float_frames_get((track), \
float_frame_bits, \
iter_frame_offset, \
MIN(EFFECT_BUF_SIZE, \
iter_frame_count)); \
if(iter_read <= 0) \
ITERATOR_ESCAPE(); \
if(iter_read < EFFECT_BUF_SIZE) \
iter_is_last_iteration = 1; \
iter_written = iter_read; \
} while(0)
#define ITERATOR_CHECKER() \
if(!int32_frame_bits) { \
FAIL("failed to allocate iterator buffer\n"); \
break; \
}
#define ITERATORF_CHECKER() \
if(!float_frame_bits) { \
FAIL("failed to allocate iterator buffer\n"); \
break; \
}
/*
* shl is optional.
*/
#define ITERATOR_SKEL(shl, track, checker, reader, func) \
do { \
checker; \
if((shl)->module_cancel_requested) \
break; \
do { \
reader; \
do { \
func; \
if((shl)) \
gtk_progress_bar_set_fraction((shl)->progress, \
CLAMP((float)iter_frames_processed / \
(float)(iter_frame_count_old), 0, 1)); \
} while(0); \
iter_frames_processed += iter_read; \
iter_frame_offset += iter_written; \
iter_frame_count -= iter_read; \
gui_yield(); \
if((shl) && (shl)->module_cancel_requested) \
ITERATOR_ESCAPE(); \
} while(!iter_escape && iter_read > 0 && iter_frame_count); \
DEBUG("total: %ld\n", iter_frame_count_old); \
if((shl)) \
gtk_progress_bar_set_fraction((shl)->progress, 0); \
} while(0)
#define ITERATOR(shl, track, func) \
ITERATOR_SKEL(shl, track, ITERATOR_CHECKER(), ITERATOR_READER(shl, track), func)
#define ITERATORF(shl, track, func) \
ITERATOR_SKEL(shl, track, ITERATORF_CHECKER(), ITERATORF_READER(shl, track), func)
#endif /* ! ITERATOR_H */
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