Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1486 insertions, 0 deletions

diff --git a/sound/synth/emux/soundfont.c b/sound/synth/emux/soundfont.c
new file mode 100644
index 000000000..9ebc711af
--- /dev/null
+++ b/sound/synth/emux/soundfont.c
@@ -0,0 +1,1486 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Soundfont generic routines.
+ *	It is intended that these should be used by any driver that is willing
+ *	to accept soundfont patches.
+ *
+ *  Copyright (C) 1999 Steve Ratcliffe
+ *  Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
+ */
+/*
+ * Deal with reading in of a soundfont.  Code follows the OSS way
+ * of doing things so that the old sfxload utility can be used.
+ * Everything may change when there is an alsa way of doing things.
+ */
+#include <linux/uaccess.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <sound/core.h>
+#include <sound/soundfont.h>
+#include <sound/seq_oss_legacy.h>
+
+/* Prototypes for static functions */
+
+static int open_patch(struct snd_sf_list *sflist, const char __user *data,
+		      int count, int client);
+static struct snd_soundfont *newsf(struct snd_sf_list *sflist, int type, char *name);
+static int is_identical_font(struct snd_soundfont *sf, int type, unsigned char *name);
+static int close_patch(struct snd_sf_list *sflist);
+static int probe_data(struct snd_sf_list *sflist, int sample_id);
+static void set_zone_counter(struct snd_sf_list *sflist,
+			     struct snd_soundfont *sf, struct snd_sf_zone *zp);
+static struct snd_sf_zone *sf_zone_new(struct snd_sf_list *sflist,
+				       struct snd_soundfont *sf);
+static void set_sample_counter(struct snd_sf_list *sflist,
+			       struct snd_soundfont *sf, struct snd_sf_sample *sp);
+static struct snd_sf_sample *sf_sample_new(struct snd_sf_list *sflist,
+					   struct snd_soundfont *sf);
+static void sf_sample_delete(struct snd_sf_list *sflist,
+			     struct snd_soundfont *sf, struct snd_sf_sample *sp);
+static int load_map(struct snd_sf_list *sflist, const void __user *data, int count);
+static int load_info(struct snd_sf_list *sflist, const void __user *data, long count);
+static int remove_info(struct snd_sf_list *sflist, struct snd_soundfont *sf,
+		       int bank, int instr);
+static void init_voice_info(struct soundfont_voice_info *avp);
+static void init_voice_parm(struct soundfont_voice_parm *pp);
+static struct snd_sf_sample *set_sample(struct snd_soundfont *sf,
+					struct soundfont_voice_info *avp);
+static struct snd_sf_sample *find_sample(struct snd_soundfont *sf, int sample_id);
+static int load_data(struct snd_sf_list *sflist, const void __user *data, long count);
+static void rebuild_presets(struct snd_sf_list *sflist);
+static void add_preset(struct snd_sf_list *sflist, struct snd_sf_zone *cur);
+static void delete_preset(struct snd_sf_list *sflist, struct snd_sf_zone *zp);
+static struct snd_sf_zone *search_first_zone(struct snd_sf_list *sflist,
+					     int bank, int preset, int key);
+static int search_zones(struct snd_sf_list *sflist, int *notep, int vel,
+			int preset, int bank, struct snd_sf_zone **table,
+			int max_layers, int level);
+static int get_index(int bank, int instr, int key);
+static void snd_sf_init(struct snd_sf_list *sflist);
+static void snd_sf_clear(struct snd_sf_list *sflist);
+
+/*
+ * lock access to sflist
+ */
+static void
+lock_preset(struct snd_sf_list *sflist)
+{
+	unsigned long flags;
+	mutex_lock(&sflist->presets_mutex);
+	spin_lock_irqsave(&sflist->lock, flags);
+	sflist->presets_locked = 1;
+	spin_unlock_irqrestore(&sflist->lock, flags);
+}
+
+
+/*
+ * remove lock
+ */
+static void
+unlock_preset(struct snd_sf_list *sflist)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&sflist->lock, flags);
+	sflist->presets_locked = 0;
+	spin_unlock_irqrestore(&sflist->lock, flags);
+	mutex_unlock(&sflist->presets_mutex);
+}
+
+
+/*
+ * close the patch if the patch was opened by this client.
+ */
+int
+snd_soundfont_close_check(struct snd_sf_list *sflist, int client)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&sflist->lock, flags);
+	if (sflist->open_client == client)  {
+		spin_unlock_irqrestore(&sflist->lock, flags);
+		return close_patch(sflist);
+	}
+	spin_unlock_irqrestore(&sflist->lock, flags);
+	return 0;
+}
+
+
+/*
+ * Deal with a soundfont patch.  Any driver could use these routines
+ * although it was designed for the AWE64.
+ *
+ * The sample_write and callargs pararameters allow a callback into
+ * the actual driver to write sample data to the board or whatever
+ * it wants to do with it.
+ */
+int
+snd_soundfont_load(struct snd_sf_list *sflist, const void __user *data,
+		   long count, int client)
+{
+	struct soundfont_patch_info patch;
+	unsigned long flags;
+	int  rc;
+
+	if (count < (long)sizeof(patch)) {
+		snd_printk(KERN_ERR "patch record too small %ld\n", count);
+		return -EINVAL;
+	}
+	if (copy_from_user(&patch, data, sizeof(patch)))
+		return -EFAULT;
+
+	count -= sizeof(patch);
+	data += sizeof(patch);
+
+	if (patch.key != SNDRV_OSS_SOUNDFONT_PATCH) {
+		snd_printk(KERN_ERR "The wrong kind of patch %x\n", patch.key);
+		return -EINVAL;
+	}
+	if (count < patch.len) {
+		snd_printk(KERN_ERR "Patch too short %ld, need %d\n",
+			   count, patch.len);
+		return -EINVAL;
+	}
+	if (patch.len < 0) {
+		snd_printk(KERN_ERR "poor length %d\n", patch.len);
+		return -EINVAL;
+	}
+
+	if (patch.type == SNDRV_SFNT_OPEN_PATCH) {
+		/* grab sflist to open */
+		lock_preset(sflist);
+		rc = open_patch(sflist, data, count, client);
+		unlock_preset(sflist);
+		return rc;
+	}
+
+	/* check if other client already opened patch */
+	spin_lock_irqsave(&sflist->lock, flags);
+	if (sflist->open_client != client) {
+		spin_unlock_irqrestore(&sflist->lock, flags);
+		return -EBUSY;
+	}
+	spin_unlock_irqrestore(&sflist->lock, flags);
+
+	lock_preset(sflist);
+	rc = -EINVAL;
+	switch (patch.type) {
+	case SNDRV_SFNT_LOAD_INFO:
+		rc = load_info(sflist, data, count);
+		break;
+	case SNDRV_SFNT_LOAD_DATA:
+		rc = load_data(sflist, data, count);
+		break;
+	case SNDRV_SFNT_CLOSE_PATCH:
+		rc = close_patch(sflist);
+		break;
+	case SNDRV_SFNT_REPLACE_DATA:
+		/*rc = replace_data(&patch, data, count);*/
+		break;
+	case SNDRV_SFNT_MAP_PRESET:
+		rc = load_map(sflist, data, count);
+		break;
+	case SNDRV_SFNT_PROBE_DATA:
+		rc = probe_data(sflist, patch.optarg);
+		break;
+	case SNDRV_SFNT_REMOVE_INFO:
+		/* patch must be opened */
+		if (!sflist->currsf) {
+			snd_printk(KERN_ERR "soundfont: remove_info: "
+				   "patch not opened\n");
+			rc = -EINVAL;
+		} else {
+			int bank, instr;
+			bank = ((unsigned short)patch.optarg >> 8) & 0xff;
+			instr = (unsigned short)patch.optarg & 0xff;
+			if (! remove_info(sflist, sflist->currsf, bank, instr))
+				rc = -EINVAL;
+			else
+				rc = 0;
+		}
+		break;
+	}
+	unlock_preset(sflist);
+
+	return rc;
+}
+
+
+/* check if specified type is special font (GUS or preset-alias) */
+static inline int
+is_special_type(int type)
+{
+	type &= 0x0f;
+	return (type == SNDRV_SFNT_PAT_TYPE_GUS ||
+		type == SNDRV_SFNT_PAT_TYPE_MAP);
+}
+
+
+/* open patch; create sf list */
+static int
+open_patch(struct snd_sf_list *sflist, const char __user *data,
+	   int count, int client)
+{
+	struct soundfont_open_parm parm;
+	struct snd_soundfont *sf;
+	unsigned long flags;
+
+	spin_lock_irqsave(&sflist->lock, flags);
+	if (sflist->open_client >= 0 || sflist->currsf) {
+		spin_unlock_irqrestore(&sflist->lock, flags);
+		return -EBUSY;
+	}
+	spin_unlock_irqrestore(&sflist->lock, flags);
+
+	if (copy_from_user(&parm, data, sizeof(parm)))
+		return -EFAULT;
+
+	if (is_special_type(parm.type)) {
+		parm.type |= SNDRV_SFNT_PAT_SHARED;
+		sf = newsf(sflist, parm.type, NULL);
+	} else 
+		sf = newsf(sflist, parm.type, parm.name);
+	if (sf == NULL) {
+		return -ENOMEM;
+	}
+
+	spin_lock_irqsave(&sflist->lock, flags);
+	sflist->open_client = client;
+	sflist->currsf = sf;
+	spin_unlock_irqrestore(&sflist->lock, flags);
+
+	return 0;
+}
+
+/*
+ * Allocate a new soundfont structure.
+ */
+static struct snd_soundfont *
+newsf(struct snd_sf_list *sflist, int type, char *name)
+{
+	struct snd_soundfont *sf;
+
+	/* check the shared fonts */
+	if (type & SNDRV_SFNT_PAT_SHARED) {
+		for (sf = sflist->fonts; sf; sf = sf->next) {
+			if (is_identical_font(sf, type, name)) {
+				return sf;
+			}
+		}
+	}
+
+	/* not found -- create a new one */
+	sf = kzalloc(sizeof(*sf), GFP_KERNEL);
+	if (sf == NULL)
+		return NULL;
+	sf->id = sflist->fonts_size;
+	sflist->fonts_size++;
+
+	/* prepend this record */
+	sf->next = sflist->fonts;
+	sflist->fonts = sf;
+
+	sf->type = type;
+	sf->zones = NULL;
+	sf->samples = NULL;
+	if (name)
+		memcpy(sf->name, name, SNDRV_SFNT_PATCH_NAME_LEN);
+
+	return sf;
+}
+
+/* check if the given name matches to the existing list */
+static int
+is_identical_font(struct snd_soundfont *sf, int type, unsigned char *name)
+{
+	return ((sf->type & SNDRV_SFNT_PAT_SHARED) &&
+		(sf->type & 0x0f) == (type & 0x0f) &&
+		(name == NULL ||
+		 memcmp(sf->name, name, SNDRV_SFNT_PATCH_NAME_LEN) == 0));
+}
+
+/*
+ * Close the current patch.
+ */
+static int
+close_patch(struct snd_sf_list *sflist)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&sflist->lock, flags);
+	sflist->currsf = NULL;
+	sflist->open_client = -1;
+	spin_unlock_irqrestore(&sflist->lock, flags);
+
+	rebuild_presets(sflist);
+
+	return 0;
+
+}
+
+/* probe sample in the current list -- nothing to be loaded */
+static int
+probe_data(struct snd_sf_list *sflist, int sample_id)
+{
+	/* patch must be opened */
+	if (sflist->currsf) {
+		/* search the specified sample by optarg */
+		if (find_sample(sflist->currsf, sample_id))
+			return 0;
+	}
+	return -EINVAL;
+}
+
+/*
+ * increment zone counter
+ */
+static void
+set_zone_counter(struct snd_sf_list *sflist, struct snd_soundfont *sf,
+		 struct snd_sf_zone *zp)
+{
+	zp->counter = sflist->zone_counter++;
+	if (sf->type & SNDRV_SFNT_PAT_LOCKED)
+		sflist->zone_locked = sflist->zone_counter;
+}
+
+/*
+ * allocate a new zone record
+ */
+static struct snd_sf_zone *
+sf_zone_new(struct snd_sf_list *sflist, struct snd_soundfont *sf)
+{
+	struct snd_sf_zone *zp;
+
+	if ((zp = kzalloc(sizeof(*zp), GFP_KERNEL)) == NULL)
+		return NULL;
+	zp->next = sf->zones;
+	sf->zones = zp;
+
+	init_voice_info(&zp->v);
+
+	set_zone_counter(sflist, sf, zp);
+	return zp;
+}
+
+
+/*
+ * increment sample counter
+ */
+static void
+set_sample_counter(struct snd_sf_list *sflist, struct snd_soundfont *sf,
+		   struct snd_sf_sample *sp)
+{
+	sp->counter = sflist->sample_counter++;
+	if (sf->type & SNDRV_SFNT_PAT_LOCKED)
+		sflist->sample_locked = sflist->sample_counter;
+}
+
+/*
+ * allocate a new sample list record
+ */
+static struct snd_sf_sample *
+sf_sample_new(struct snd_sf_list *sflist, struct snd_soundfont *sf)
+{
+	struct snd_sf_sample *sp;
+
+	if ((sp = kzalloc(sizeof(*sp), GFP_KERNEL)) == NULL)
+		return NULL;
+
+	sp->next = sf->samples;
+	sf->samples = sp;
+
+	set_sample_counter(sflist, sf, sp);
+	return sp;
+}
+
+/*
+ * delete sample list -- this is an exceptional job.
+ * only the last allocated sample can be deleted.
+ */
+static void
+sf_sample_delete(struct snd_sf_list *sflist, struct snd_soundfont *sf,
+		 struct snd_sf_sample *sp)
+{
+	/* only last sample is accepted */
+	if (sp == sf->samples) {
+		sf->samples = sp->next;
+		kfree(sp);
+	}
+}
+
+
+/* load voice map */
+static int
+load_map(struct snd_sf_list *sflist, const void __user *data, int count)
+{
+	struct snd_sf_zone *zp, *prevp;
+	struct snd_soundfont *sf;
+	struct soundfont_voice_map map;
+
+	/* get the link info */
+	if (count < (int)sizeof(map))
+		return -EINVAL;
+	if (copy_from_user(&map, data, sizeof(map)))
+		return -EFAULT;
+
+	if (map.map_instr < 0 || map.map_instr >= SF_MAX_INSTRUMENTS)
+		return -EINVAL;
+	
+	sf = newsf(sflist, SNDRV_SFNT_PAT_TYPE_MAP|SNDRV_SFNT_PAT_SHARED, NULL);
+	if (sf == NULL)
+		return -ENOMEM;
+
+	prevp = NULL;
+	for (zp = sf->zones; zp; prevp = zp, zp = zp->next) {
+		if (zp->mapped &&
+		    zp->instr == map.map_instr &&
+		    zp->bank == map.map_bank &&
+		    zp->v.low == map.map_key &&
+		    zp->v.start == map.src_instr &&
+		    zp->v.end == map.src_bank &&
+		    zp->v.fixkey == map.src_key) {
+			/* the same mapping is already present */
+			/* relink this record to the link head */
+			if (prevp) {
+				prevp->next = zp->next;
+				zp->next = sf->zones;
+				sf->zones = zp;
+			}
+			/* update the counter */
+			set_zone_counter(sflist, sf, zp);
+			return 0;
+		}
+	}
+
+	/* create a new zone */
+	if ((zp = sf_zone_new(sflist, sf)) == NULL)
+		return -ENOMEM;
+
+	zp->bank = map.map_bank;
+	zp->instr = map.map_instr;
+	zp->mapped = 1;
+	if (map.map_key >= 0) {
+		zp->v.low = map.map_key;
+		zp->v.high = map.map_key;
+	}
+	zp->v.start = map.src_instr;
+	zp->v.end = map.src_bank;
+	zp->v.fixkey = map.src_key;
+	zp->v.sf_id = sf->id;
+
+	add_preset(sflist, zp);
+
+	return 0;
+}
+
+
+/* remove the present instrument layers */
+static int
+remove_info(struct snd_sf_list *sflist, struct snd_soundfont *sf,
+	    int bank, int instr)
+{
+	struct snd_sf_zone *prev, *next, *p;
+	int removed = 0;
+
+	prev = NULL;
+	for (p = sf->zones; p; p = next) {
+		next = p->next;
+		if (! p->mapped &&
+		    p->bank == bank && p->instr == instr) {
+			/* remove this layer */
+			if (prev)
+				prev->next = next;
+			else
+				sf->zones = next;
+			removed++;
+			kfree(p);
+		} else
+			prev = p;
+	}
+	if (removed)
+		rebuild_presets(sflist);
+	return removed;
+}
+
+
+/*
+ * Read an info record from the user buffer and save it on the current
+ * open soundfont.
+ */
+static int
+load_info(struct snd_sf_list *sflist, const void __user *data, long count)
+{
+	struct snd_soundfont *sf;
+	struct snd_sf_zone *zone;
+	struct soundfont_voice_rec_hdr hdr;
+	int i;
+
+	/* patch must be opened */
+	if ((sf = sflist->currsf) == NULL)
+		return -EINVAL;
+
+	if (is_special_type(sf->type))
+		return -EINVAL;
+
+	if (count < (long)sizeof(hdr)) {
+		printk(KERN_ERR "Soundfont error: invalid patch zone length\n");
+		return -EINVAL;
+	}
+	if (copy_from_user((char*)&hdr, data, sizeof(hdr)))
+		return -EFAULT;
+	
+	data += sizeof(hdr);
+	count -= sizeof(hdr);
+
+	if (hdr.nvoices <= 0 || hdr.nvoices >= 100) {
+		printk(KERN_ERR "Soundfont error: Illegal voice number %d\n",
+		       hdr.nvoices);
+		return -EINVAL;
+	}
+
+	if (count < (long)sizeof(struct soundfont_voice_info) * hdr.nvoices) {
+		printk(KERN_ERR "Soundfont Error: "
+		       "patch length(%ld) is smaller than nvoices(%d)\n",
+		       count, hdr.nvoices);
+		return -EINVAL;
+	}
+
+	switch (hdr.write_mode) {
+	case SNDRV_SFNT_WR_EXCLUSIVE:
+		/* exclusive mode - if the instrument already exists,
+		   return error */
+		for (zone = sf->zones; zone; zone = zone->next) {
+			if (!zone->mapped &&
+			    zone->bank == hdr.bank &&
+			    zone->instr == hdr.instr)
+				return -EINVAL;
+		}
+		break;
+	case SNDRV_SFNT_WR_REPLACE:
+		/* replace mode - remove the instrument if it already exists */
+		remove_info(sflist, sf, hdr.bank, hdr.instr);
+		break;
+	}
+
+	for (i = 0; i < hdr.nvoices; i++) {
+		struct snd_sf_zone tmpzone;
+
+		/* copy awe_voice_info parameters */
+		if (copy_from_user(&tmpzone.v, data, sizeof(tmpzone.v))) {
+			return -EFAULT;
+		}
+
+		data += sizeof(tmpzone.v);
+		count -= sizeof(tmpzone.v);
+
+		tmpzone.bank = hdr.bank;
+		tmpzone.instr = hdr.instr;
+		tmpzone.mapped = 0;
+		tmpzone.v.sf_id = sf->id;
+		if (tmpzone.v.mode & SNDRV_SFNT_MODE_INIT_PARM)
+			init_voice_parm(&tmpzone.v.parm);
+
+		/* create a new zone */
+		if ((zone = sf_zone_new(sflist, sf)) == NULL) {
+			return -ENOMEM;
+		}
+
+		/* copy the temporary data */
+		zone->bank = tmpzone.bank;
+		zone->instr = tmpzone.instr;
+		zone->v = tmpzone.v;
+
+		/* look up the sample */
+		zone->sample = set_sample(sf, &zone->v);
+	}
+
+	return 0;
+}
+
+
+/* initialize voice_info record */
+static void
+init_voice_info(struct soundfont_voice_info *avp)
+{
+	memset(avp, 0, sizeof(*avp));
+
+	avp->root = 60;
+	avp->high = 127;
+	avp->velhigh = 127;
+	avp->fixkey = -1;
+	avp->fixvel = -1;
+	avp->fixpan = -1;
+	avp->pan = -1;
+	avp->amplitude = 127;
+	avp->scaleTuning = 100;
+
+	init_voice_parm(&avp->parm);
+}
+
+/* initialize voice_parm record:
+ * Env1/2: delay=0, attack=0, hold=0, sustain=0, decay=0, release=0.
+ * Vibrato and Tremolo effects are zero.
+ * Cutoff is maximum.
+ * Chorus and Reverb effects are zero.
+ */
+static void
+init_voice_parm(struct soundfont_voice_parm *pp)
+{
+	memset(pp, 0, sizeof(*pp));
+
+	pp->moddelay = 0x8000;
+	pp->modatkhld = 0x7f7f;
+	pp->moddcysus = 0x7f7f;
+	pp->modrelease = 0x807f;
+
+	pp->voldelay = 0x8000;
+	pp->volatkhld = 0x7f7f;
+	pp->voldcysus = 0x7f7f;
+	pp->volrelease = 0x807f;
+
+	pp->lfo1delay = 0x8000;
+	pp->lfo2delay = 0x8000;
+
+	pp->cutoff = 0xff;
+}	
+
+/* search the specified sample */
+static struct snd_sf_sample *
+set_sample(struct snd_soundfont *sf, struct soundfont_voice_info *avp)
+{
+	struct snd_sf_sample *sample;
+
+	sample = find_sample(sf, avp->sample);
+	if (sample == NULL)
+		return NULL;
+
+	/* add in the actual sample offsets:
+	 * The voice_info addresses define only the relative offset
+	 * from sample pointers.  Here we calculate the actual DRAM
+	 * offset from sample pointers.
+	 */
+	avp->start += sample->v.start;
+	avp->end += sample->v.end;
+	avp->loopstart += sample->v.loopstart;
+	avp->loopend += sample->v.loopend;
+
+	/* copy mode flags */
+	avp->sample_mode = sample->v.mode_flags;
+
+	return sample;
+}
+
+/* find the sample pointer with the given id in the soundfont */
+static struct snd_sf_sample *
+find_sample(struct snd_soundfont *sf, int sample_id)
+{
+	struct snd_sf_sample *p;
+
+	if (sf == NULL)
+		return NULL;
+
+	for (p = sf->samples; p; p = p->next) {
+		if (p->v.sample == sample_id)
+			return p;
+	}
+	return NULL;
+}
+
+
+/*
+ * Load sample information, this can include data to be loaded onto
+ * the soundcard.  It can also just be a pointer into soundcard ROM.
+ * If there is data it will be written to the soundcard via the callback
+ * routine.
+ */
+static int
+load_data(struct snd_sf_list *sflist, const void __user *data, long count)
+{
+	struct snd_soundfont *sf;
+	struct soundfont_sample_info sample_info;
+	struct snd_sf_sample *sp;
+	long off;
+
+	/* patch must be opened */
+	if ((sf = sflist->currsf) == NULL)
+		return -EINVAL;
+
+	if (is_special_type(sf->type))
+		return -EINVAL;
+
+	if (copy_from_user(&sample_info, data, sizeof(sample_info)))
+		return -EFAULT;
+
+	off = sizeof(sample_info);
+
+	if (sample_info.size != (count-off)/2)
+		return -EINVAL;
+
+	/* Check for dup */
+	if (find_sample(sf, sample_info.sample)) {
+		/* if shared sample, skip this data */
+		if (sf->type & SNDRV_SFNT_PAT_SHARED)
+			return 0;
+		return -EINVAL;
+	}
+
+	/* Allocate a new sample structure */
+	if ((sp = sf_sample_new(sflist, sf)) == NULL)
+		return -ENOMEM;
+
+	sp->v = sample_info;
+	sp->v.sf_id = sf->id;
+	sp->v.dummy = 0;
+	sp->v.truesize = sp->v.size;
+
+	/*
+	 * If there is wave data then load it.
+	 */
+	if (sp->v.size > 0) {
+		int  rc;
+		rc = sflist->callback.sample_new
+			(sflist->callback.private_data, sp, sflist->memhdr,
+			 data + off, count - off);
+		if (rc < 0) {
+			sf_sample_delete(sflist, sf, sp);
+			return rc;
+		}
+		sflist->mem_used += sp->v.truesize;
+	}
+
+	return count;
+}
+
+
+/* log2_tbl[i] = log2(i+128) * 0x10000 */
+static const int log_tbl[129] = {
+	0x70000, 0x702df, 0x705b9, 0x7088e, 0x70b5d, 0x70e26, 0x710eb, 0x713aa,
+	0x71663, 0x71918, 0x71bc8, 0x71e72, 0x72118, 0x723b9, 0x72655, 0x728ed,
+	0x72b80, 0x72e0e, 0x73098, 0x7331d, 0x7359e, 0x7381b, 0x73a93, 0x73d08,
+	0x73f78, 0x741e4, 0x7444c, 0x746b0, 0x74910, 0x74b6c, 0x74dc4, 0x75019,
+	0x75269, 0x754b6, 0x75700, 0x75946, 0x75b88, 0x75dc7, 0x76002, 0x7623a,
+	0x7646e, 0x766a0, 0x768cd, 0x76af8, 0x76d1f, 0x76f43, 0x77164, 0x77382,
+	0x7759d, 0x777b4, 0x779c9, 0x77bdb, 0x77dea, 0x77ff5, 0x781fe, 0x78404,
+	0x78608, 0x78808, 0x78a06, 0x78c01, 0x78df9, 0x78fef, 0x791e2, 0x793d2,
+	0x795c0, 0x797ab, 0x79993, 0x79b79, 0x79d5d, 0x79f3e, 0x7a11d, 0x7a2f9,
+	0x7a4d3, 0x7a6ab, 0x7a880, 0x7aa53, 0x7ac24, 0x7adf2, 0x7afbe, 0x7b188,
+	0x7b350, 0x7b515, 0x7b6d8, 0x7b899, 0x7ba58, 0x7bc15, 0x7bdd0, 0x7bf89,
+	0x7c140, 0x7c2f5, 0x7c4a7, 0x7c658, 0x7c807, 0x7c9b3, 0x7cb5e, 0x7cd07,
+	0x7ceae, 0x7d053, 0x7d1f7, 0x7d398, 0x7d538, 0x7d6d6, 0x7d872, 0x7da0c,
+	0x7dba4, 0x7dd3b, 0x7ded0, 0x7e063, 0x7e1f4, 0x7e384, 0x7e512, 0x7e69f,
+	0x7e829, 0x7e9b3, 0x7eb3a, 0x7ecc0, 0x7ee44, 0x7efc7, 0x7f148, 0x7f2c8,
+	0x7f446, 0x7f5c2, 0x7f73d, 0x7f8b7, 0x7fa2f, 0x7fba5, 0x7fd1a, 0x7fe8d,
+	0x80000,
+};
+
+/* convert from linear to log value
+ *
+ * conversion: value = log2(amount / base) * ratio
+ *
+ * argument:
+ *   amount = linear value (unsigned, 32bit max)
+ *   offset = base offset (:= log2(base) * 0x10000)
+ *   ratio = division ratio
+ *
+ */
+int
+snd_sf_linear_to_log(unsigned int amount, int offset, int ratio)
+{
+	int v;
+	int s, low, bit;
+	
+	if (amount < 2)
+		return 0;
+	for (bit = 0; ! (amount & 0x80000000L); bit++)
+		amount <<= 1;
+	s = (amount >> 24) & 0x7f;
+	low = (amount >> 16) & 0xff;
+	/* linear approxmimation by lower 8 bit */
+	v = (log_tbl[s + 1] * low + log_tbl[s] * (0x100 - low)) >> 8;
+	v -= offset;
+	v = (v * ratio) >> 16;
+	v += (24 - bit) * ratio;
+	return v;
+}
+
+EXPORT_SYMBOL(snd_sf_linear_to_log);
+
+
+#define OFFSET_MSEC		653117		/* base = 1000 */
+#define OFFSET_ABSCENT		851781		/* base = 8176 */
+#define OFFSET_SAMPLERATE	1011119		/* base = 44100 */
+
+#define ABSCENT_RATIO		1200
+#define TIMECENT_RATIO		1200
+#define SAMPLERATE_RATIO	4096
+
+/*
+ * mHz to abscent
+ * conversion: abscent = log2(MHz / 8176) * 1200
+ */
+static int
+freq_to_note(int mhz)
+{
+	return snd_sf_linear_to_log(mhz, OFFSET_ABSCENT, ABSCENT_RATIO);
+}
+
+/* convert Hz to AWE32 rate offset:
+ * sample pitch offset for the specified sample rate
+ * rate=44100 is no offset, each 4096 is 1 octave (twice).
+ * eg, when rate is 22050, this offset becomes -4096.
+ *
+ * conversion: offset = log2(Hz / 44100) * 4096
+ */
+static int
+calc_rate_offset(int hz)
+{
+	return snd_sf_linear_to_log(hz, OFFSET_SAMPLERATE, SAMPLERATE_RATIO);
+}
+
+
+/* calculate GUS envelope time */
+static int
+calc_gus_envelope_time(int rate, int start, int end)
+{
+	int r, p, t;
+	r = (3 - ((rate >> 6) & 3)) * 3;
+	p = rate & 0x3f;
+	if (!p)
+		p = 1;
+	t = end - start;
+	if (t < 0) t = -t;
+	if (13 > r)
+		t = t << (13 - r);
+	else
+		t = t >> (r - 13);
+	return (t * 10) / (p * 441);
+}
+
+/* convert envelope time parameter to soundfont parameters */
+
+/* attack & decay/release time table (msec) */
+static const short attack_time_tbl[128] = {
+32767, 32767, 5989, 4235, 2994, 2518, 2117, 1780, 1497, 1373, 1259, 1154, 1058, 970, 890, 816,
+707, 691, 662, 634, 607, 581, 557, 533, 510, 489, 468, 448, 429, 411, 393, 377,
+361, 345, 331, 317, 303, 290, 278, 266, 255, 244, 234, 224, 214, 205, 196, 188,
+180, 172, 165, 158, 151, 145, 139, 133, 127, 122, 117, 112, 107, 102, 98, 94,
+90, 86, 82, 79, 75, 72, 69, 66, 63, 61, 58, 56, 53, 51, 49, 47,
+45, 43, 41, 39, 37, 36, 34, 33, 31, 30, 29, 28, 26, 25, 24, 23,
+22, 21, 20, 19, 19, 18, 17, 16, 16, 15, 15, 14, 13, 13, 12, 12,
+11, 11, 10, 10, 10, 9, 9, 8, 8, 8, 8, 7, 7, 7, 6, 0,
+};
+
+static const short decay_time_tbl[128] = {
+32767, 32767, 22614, 15990, 11307, 9508, 7995, 6723, 5653, 5184, 4754, 4359, 3997, 3665, 3361, 3082,
+2828, 2765, 2648, 2535, 2428, 2325, 2226, 2132, 2042, 1955, 1872, 1793, 1717, 1644, 1574, 1507,
+1443, 1382, 1324, 1267, 1214, 1162, 1113, 1066, 978, 936, 897, 859, 822, 787, 754, 722,
+691, 662, 634, 607, 581, 557, 533, 510, 489, 468, 448, 429, 411, 393, 377, 361,
+345, 331, 317, 303, 290, 278, 266, 255, 244, 234, 224, 214, 205, 196, 188, 180,
+172, 165, 158, 151, 145, 139, 133, 127, 122, 117, 112, 107, 102, 98, 94, 90,
+86, 82, 79, 75, 72, 69, 66, 63, 61, 58, 56, 53, 51, 49, 47, 45,
+43, 41, 39, 37, 36, 34, 33, 31, 30, 29, 28, 26, 25, 24, 23, 22,
+};
+
+/* delay time = 0x8000 - msec/92 */
+int
+snd_sf_calc_parm_hold(int msec)
+{
+	int val = (0x7f * 92 - msec) / 92;
+	if (val < 1) val = 1;
+	if (val >= 126) val = 126;
+	return val;
+}
+
+/* search an index for specified time from given time table */
+static int
+calc_parm_search(int msec, const short *table)
+{
+	int left = 1, right = 127, mid;
+	while (left < right) {
+		mid = (left + right) / 2;
+		if (msec < (int)table[mid])
+			left = mid + 1;
+		else
+			right = mid;
+	}
+	return left;
+}
+
+/* attack time: search from time table */
+int
+snd_sf_calc_parm_attack(int msec)
+{
+	return calc_parm_search(msec, attack_time_tbl);
+}
+
+/* decay/release time: search from time table */
+int
+snd_sf_calc_parm_decay(int msec)
+{
+	return calc_parm_search(msec, decay_time_tbl);
+}
+
+int snd_sf_vol_table[128] = {
+	255,111,95,86,79,74,70,66,63,61,58,56,54,52,50,49,
+	47,46,45,43,42,41,40,39,38,37,36,35,34,34,33,32,
+	31,31,30,29,29,28,27,27,26,26,25,24,24,23,23,22,
+	22,21,21,21,20,20,19,19,18,18,18,17,17,16,16,16,
+	15,15,15,14,14,14,13,13,13,12,12,12,11,11,11,10,
+	10,10,10,9,9,9,8,8,8,8,7,7,7,7,6,6,
+	6,6,5,5,5,5,5,4,4,4,4,3,3,3,3,3,
+	2,2,2,2,2,1,1,1,1,1,0,0,0,0,0,0,
+};
+
+
+#define calc_gus_sustain(val)  (0x7f - snd_sf_vol_table[(val)/2])
+#define calc_gus_attenuation(val)	snd_sf_vol_table[(val)/2]
+
+/* load GUS patch */
+static int
+load_guspatch(struct snd_sf_list *sflist, const char __user *data,
+	      long count, int client)
+{
+	struct patch_info patch;
+	struct snd_soundfont *sf;
+	struct snd_sf_zone *zone;
+	struct snd_sf_sample *smp;
+	int note, sample_id;
+	int rc;
+
+	if (count < (long)sizeof(patch)) {
+		snd_printk(KERN_ERR "patch record too small %ld\n", count);
+		return -EINVAL;
+	}
+	if (copy_from_user(&patch, data, sizeof(patch)))
+		return -EFAULT;
+	
+	count -= sizeof(patch);
+	data += sizeof(patch);
+
+	sf = newsf(sflist, SNDRV_SFNT_PAT_TYPE_GUS|SNDRV_SFNT_PAT_SHARED, NULL);
+	if (sf == NULL)
+		return -ENOMEM;
+	if ((smp = sf_sample_new(sflist, sf)) == NULL)
+		return -ENOMEM;
+	sample_id = sflist->sample_counter;
+	smp->v.sample = sample_id;
+	smp->v.start = 0;
+	smp->v.end = patch.len;
+	smp->v.loopstart = patch.loop_start;
+	smp->v.loopend = patch.loop_end;
+	smp->v.size = patch.len;
+
+	/* set up mode flags */
+	smp->v.mode_flags = 0;
+	if (!(patch.mode & WAVE_16_BITS))
+		smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_8BITS;
+	if (patch.mode & WAVE_UNSIGNED)
+		smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_UNSIGNED;
+	smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_NO_BLANK;
+	if (!(patch.mode & (WAVE_LOOPING|WAVE_BIDIR_LOOP|WAVE_LOOP_BACK)))
+		smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_SINGLESHOT;
+	if (patch.mode & WAVE_BIDIR_LOOP)
+		smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_BIDIR_LOOP;
+	if (patch.mode & WAVE_LOOP_BACK)
+		smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_REVERSE_LOOP;
+
+	if (patch.mode & WAVE_16_BITS) {
+		/* convert to word offsets */
+		smp->v.size /= 2;
+		smp->v.end /= 2;
+		smp->v.loopstart /= 2;
+		smp->v.loopend /= 2;
+	}
+	/*smp->v.loopend++;*/
+
+	smp->v.dummy = 0;
+	smp->v.truesize = 0;
+	smp->v.sf_id = sf->id;
+
+	/* set up voice info */
+	if ((zone = sf_zone_new(sflist, sf)) == NULL) {
+		sf_sample_delete(sflist, sf, smp);
+		return -ENOMEM;
+	}
+
+	/*
+	 * load wave data
+	 */
+	if (sflist->callback.sample_new) {
+		rc = sflist->callback.sample_new
+			(sflist->callback.private_data, smp, sflist->memhdr,
+			 data, count);
+		if (rc < 0) {
+			sf_sample_delete(sflist, sf, smp);
+			kfree(zone);
+			return rc;
+		}
+		/* memory offset is updated after */
+	}
+
+	/* update the memory offset here */
+	sflist->mem_used += smp->v.truesize;
+
+	zone->v.sample = sample_id; /* the last sample */
+	zone->v.rate_offset = calc_rate_offset(patch.base_freq);
+	note = freq_to_note(patch.base_note);
+	zone->v.root = note / 100;
+	zone->v.tune = -(note % 100);
+	zone->v.low = (freq_to_note(patch.low_note) + 99) / 100;
+	zone->v.high = freq_to_note(patch.high_note) / 100;
+	/* panning position; -128 - 127 => 0-127 */
+	zone->v.pan = (patch.panning + 128) / 2;
+#if 0
+	snd_printk(KERN_DEBUG
+		   "gus: basefrq=%d (ofs=%d) root=%d,tune=%d, range:%d-%d\n",
+		   (int)patch.base_freq, zone->v.rate_offset,
+		   zone->v.root, zone->v.tune, zone->v.low, zone->v.high);
+#endif
+
+	/* detuning is ignored */
+	/* 6points volume envelope */
+	if (patch.mode & WAVE_ENVELOPES) {
+		int attack, hold, decay, release;
+		attack = calc_gus_envelope_time
+			(patch.env_rate[0], 0, patch.env_offset[0]);
+		hold = calc_gus_envelope_time
+			(patch.env_rate[1], patch.env_offset[0],
+			 patch.env_offset[1]);
+		decay = calc_gus_envelope_time
+			(patch.env_rate[2], patch.env_offset[1],
+			 patch.env_offset[2]);
+		release = calc_gus_envelope_time
+			(patch.env_rate[3], patch.env_offset[1],
+			 patch.env_offset[4]);
+		release += calc_gus_envelope_time
+			(patch.env_rate[4], patch.env_offset[3],
+			 patch.env_offset[4]);
+		release += calc_gus_envelope_time
+			(patch.env_rate[5], patch.env_offset[4],
+			 patch.env_offset[5]);
+		zone->v.parm.volatkhld = 
+			(snd_sf_calc_parm_hold(hold) << 8) |
+			snd_sf_calc_parm_attack(attack);
+		zone->v.parm.voldcysus = (calc_gus_sustain(patch.env_offset[2]) << 8) |
+			snd_sf_calc_parm_decay(decay);
+		zone->v.parm.volrelease = 0x8000 | snd_sf_calc_parm_decay(release);
+		zone->v.attenuation = calc_gus_attenuation(patch.env_offset[0]);
+#if 0
+		snd_printk(KERN_DEBUG
+			   "gus: atkhld=%x, dcysus=%x, volrel=%x, att=%d\n",
+			   zone->v.parm.volatkhld,
+			   zone->v.parm.voldcysus,
+			   zone->v.parm.volrelease,
+			   zone->v.attenuation);
+#endif
+	}
+
+	/* fast release */
+	if (patch.mode & WAVE_FAST_RELEASE) {
+		zone->v.parm.volrelease = 0x807f;
+	}
+
+	/* tremolo effect */
+	if (patch.mode & WAVE_TREMOLO) {
+		int rate = (patch.tremolo_rate * 1000 / 38) / 42;
+		zone->v.parm.tremfrq = ((patch.tremolo_depth / 2) << 8) | rate;
+	}
+	/* vibrato effect */
+	if (patch.mode & WAVE_VIBRATO) {
+		int rate = (patch.vibrato_rate * 1000 / 38) / 42;
+		zone->v.parm.fm2frq2 = ((patch.vibrato_depth / 6) << 8) | rate;
+	}
+	
+	/* scale_freq, scale_factor, volume, and fractions not implemented */
+
+	if (!(smp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT))
+		zone->v.mode = SNDRV_SFNT_MODE_LOOPING;
+	else
+		zone->v.mode = 0;
+
+	/* append to the tail of the list */
+	/*zone->bank = ctrls[AWE_MD_GUS_BANK];*/
+	zone->bank = 0;
+	zone->instr = patch.instr_no;
+	zone->mapped = 0;
+	zone->v.sf_id = sf->id;
+
+	zone->sample = set_sample(sf, &zone->v);
+
+	/* rebuild preset now */
+	add_preset(sflist, zone);
+
+	return 0;
+}
+
+/* load GUS patch */
+int
+snd_soundfont_load_guspatch(struct snd_sf_list *sflist, const char __user *data,
+			    long count, int client)
+{
+	int rc;
+	lock_preset(sflist);
+	rc = load_guspatch(sflist, data, count, client);
+	unlock_preset(sflist);
+	return rc;
+}
+
+
+/*
+ * Rebuild the preset table.  This is like a hash table in that it allows
+ * quick access to the zone information.  For each preset there are zone
+ * structures linked by next_instr and by next_zone.  Former is the whole
+ * link for this preset, and latter is the link for zone (i.e. instrument/
+ * bank/key combination).
+ */
+static void
+rebuild_presets(struct snd_sf_list *sflist)
+{
+	struct snd_soundfont *sf;
+	struct snd_sf_zone *cur;
+
+	/* clear preset table */
+	memset(sflist->presets, 0, sizeof(sflist->presets));
+
+	/* search all fonts and insert each font */
+	for (sf = sflist->fonts; sf; sf = sf->next) {
+		for (cur = sf->zones; cur; cur = cur->next) {
+			if (! cur->mapped && cur->sample == NULL) {
+				/* try again to search the corresponding sample */
+				cur->sample = set_sample(sf, &cur->v);
+				if (cur->sample == NULL)
+					continue;
+			}
+
+			add_preset(sflist, cur);
+		}
+	}
+}
+
+
+/*
+ * add the given zone to preset table
+ */
+static void
+add_preset(struct snd_sf_list *sflist, struct snd_sf_zone *cur)
+{
+	struct snd_sf_zone *zone;
+	int index;
+
+	zone = search_first_zone(sflist, cur->bank, cur->instr, cur->v.low);
+	if (zone && zone->v.sf_id != cur->v.sf_id) {
+		/* different instrument was already defined */
+		struct snd_sf_zone *p;
+		/* compare the allocated time */
+		for (p = zone; p; p = p->next_zone) {
+			if (p->counter > cur->counter)
+				/* the current is older.. skipped */
+				return;
+		}
+		/* remove old zones */
+		delete_preset(sflist, zone);
+		zone = NULL; /* do not forget to clear this! */
+	}
+
+	/* prepend this zone */
+	if ((index = get_index(cur->bank, cur->instr, cur->v.low)) < 0)
+		return;
+	cur->next_zone = zone; /* zone link */
+	cur->next_instr = sflist->presets[index]; /* preset table link */
+	sflist->presets[index] = cur;
+}
+
+/*
+ * delete the given zones from preset_table
+ */
+static void
+delete_preset(struct snd_sf_list *sflist, struct snd_sf_zone *zp)
+{
+	int index;
+	struct snd_sf_zone *p;
+
+	if ((index = get_index(zp->bank, zp->instr, zp->v.low)) < 0)
+		return;
+	for (p = sflist->presets[index]; p; p = p->next_instr) {
+		while (p->next_instr == zp) {
+			p->next_instr = zp->next_instr;
+			zp = zp->next_zone;
+			if (zp == NULL)
+				return;
+		}
+	}
+}
+
+
+/*
+ * Search matching zones from preset table.
+ * The note can be rewritten by preset mapping (alias).
+ * The found zones are stored on 'table' array.  max_layers defines
+ * the maximum number of elements in this array.
+ * This function returns the number of found zones.  0 if not found.
+ */
+int
+snd_soundfont_search_zone(struct snd_sf_list *sflist, int *notep, int vel,
+			  int preset, int bank,
+			  int def_preset, int def_bank,
+			  struct snd_sf_zone **table, int max_layers)
+{
+	int nvoices;
+	unsigned long flags;
+
+	/* this function is supposed to be called atomically,
+	 * so we check the lock.  if it's busy, just returns 0 to
+	 * tell the caller the busy state
+	 */
+	spin_lock_irqsave(&sflist->lock, flags);
+	if (sflist->presets_locked) {
+		spin_unlock_irqrestore(&sflist->lock, flags);
+		return 0;
+	}
+	nvoices = search_zones(sflist, notep, vel, preset, bank,
+			       table, max_layers, 0);
+	if (! nvoices) {
+		if (preset != def_preset || bank != def_bank)
+			nvoices = search_zones(sflist, notep, vel,
+					       def_preset, def_bank,
+					       table, max_layers, 0);
+	}
+	spin_unlock_irqrestore(&sflist->lock, flags);
+	return nvoices;
+}
+
+
+/*
+ * search the first matching zone
+ */
+static struct snd_sf_zone *
+search_first_zone(struct snd_sf_list *sflist, int bank, int preset, int key)
+{
+	int index;
+	struct snd_sf_zone *zp;
+
+	if ((index = get_index(bank, preset, key)) < 0)
+		return NULL;
+	for (zp = sflist->presets[index]; zp; zp = zp->next_instr) {
+		if (zp->instr == preset && zp->bank == bank)
+			return zp;
+	}
+	return NULL;
+}
+
+
+/*
+ * search matching zones from sflist.  can be called recursively.
+ */
+static int
+search_zones(struct snd_sf_list *sflist, int *notep, int vel,
+	     int preset, int bank, struct snd_sf_zone **table,
+	     int max_layers, int level)
+{
+	struct snd_sf_zone *zp;
+	int nvoices;
+
+	zp = search_first_zone(sflist, bank, preset, *notep);
+	nvoices = 0;
+	for (; zp; zp = zp->next_zone) {
+		if (*notep >= zp->v.low && *notep <= zp->v.high &&
+		    vel >= zp->v.vellow && vel <= zp->v.velhigh) {
+			if (zp->mapped) {
+				/* search preset mapping (aliasing) */
+				int key = zp->v.fixkey;
+				preset = zp->v.start;
+				bank = zp->v.end;
+
+				if (level > 5) /* too deep alias level */
+					return 0;
+				if (key < 0)
+					key = *notep;
+				nvoices = search_zones(sflist, &key, vel,
+						       preset, bank, table,
+						       max_layers, level + 1);
+				if (nvoices > 0)
+					*notep = key;
+				break;
+			}
+			table[nvoices++] = zp;
+			if (nvoices >= max_layers)
+				break;
+		}
+	}
+
+	return nvoices;
+}
+
+
+/* calculate the index of preset table:
+ * drums are mapped from 128 to 255 according to its note key.
+ * other instruments are mapped from 0 to 127.
+ * if the index is out of range, return -1.
+ */
+static int
+get_index(int bank, int instr, int key)
+{
+	int index;
+	if (SF_IS_DRUM_BANK(bank))
+		index = key + SF_MAX_INSTRUMENTS;
+	else
+		index = instr;
+	index = index % SF_MAX_PRESETS;
+	if (index < 0)
+		return -1;
+	return index;
+}
+
+/*
+ * Initialise the sflist structure.
+ */
+static void
+snd_sf_init(struct snd_sf_list *sflist)
+{
+	memset(sflist->presets, 0, sizeof(sflist->presets));
+
+	sflist->mem_used = 0;
+	sflist->currsf = NULL;
+	sflist->open_client = -1;
+	sflist->fonts = NULL;
+	sflist->fonts_size = 0;
+	sflist->zone_counter = 0;
+	sflist->sample_counter = 0;
+	sflist->zone_locked = 0;
+	sflist->sample_locked = 0;
+}
+
+/*
+ * Release all list records
+ */
+static void
+snd_sf_clear(struct snd_sf_list *sflist)
+{
+	struct snd_soundfont *sf, *nextsf;
+	struct snd_sf_zone *zp, *nextzp;
+	struct snd_sf_sample *sp, *nextsp;
+
+	for (sf = sflist->fonts; sf; sf = nextsf) {
+		nextsf = sf->next;
+		for (zp = sf->zones; zp; zp = nextzp) {
+			nextzp = zp->next;
+			kfree(zp);
+		}
+		for (sp = sf->samples; sp; sp = nextsp) {
+			nextsp = sp->next;
+			if (sflist->callback.sample_free)
+				sflist->callback.sample_free(sflist->callback.private_data,
+							     sp, sflist->memhdr);
+			kfree(sp);
+		}
+		kfree(sf);
+	}
+
+	snd_sf_init(sflist);
+}
+
+
+/*
+ * Create a new sflist structure
+ */
+struct snd_sf_list *
+snd_sf_new(struct snd_sf_callback *callback, struct snd_util_memhdr *hdr)
+{
+	struct snd_sf_list *sflist;
+
+	if ((sflist = kzalloc(sizeof(*sflist), GFP_KERNEL)) == NULL)
+		return NULL;
+
+	mutex_init(&sflist->presets_mutex);
+	spin_lock_init(&sflist->lock);
+	sflist->memhdr = hdr;
+
+	if (callback)
+		sflist->callback = *callback;
+
+	snd_sf_init(sflist);
+	return sflist;
+}
+
+
+/*
+ * Free everything allocated off the sflist structure.
+ */
+void
+snd_sf_free(struct snd_sf_list *sflist)
+{
+	if (sflist == NULL)
+		return;
+	
+	lock_preset(sflist);
+	if (sflist->callback.sample_reset)
+		sflist->callback.sample_reset(sflist->callback.private_data);
+	snd_sf_clear(sflist);
+	unlock_preset(sflist);
+
+	kfree(sflist);
+}
+
+/*
+ * Remove all samples
+ * The soundcard should be silet before calling this function.
+ */
+int
+snd_soundfont_remove_samples(struct snd_sf_list *sflist)
+{
+	lock_preset(sflist);
+	if (sflist->callback.sample_reset)
+		sflist->callback.sample_reset(sflist->callback.private_data);
+	snd_sf_clear(sflist);
+	unlock_preset(sflist);
+
+	return 0;
+}
+
+/*
+ * Remove unlocked samples.
+ * The soundcard should be silent before calling this function.
+ */
+int
+snd_soundfont_remove_unlocked(struct snd_sf_list *sflist)
+{
+	struct snd_soundfont *sf;
+	struct snd_sf_zone *zp, *nextzp;
+	struct snd_sf_sample *sp, *nextsp;
+
+	lock_preset(sflist);
+
+	if (sflist->callback.sample_reset)
+		sflist->callback.sample_reset(sflist->callback.private_data);
+
+	/* to be sure */
+	memset(sflist->presets, 0, sizeof(sflist->presets));
+
+	for (sf = sflist->fonts; sf; sf = sf->next) {
+		for (zp = sf->zones; zp; zp = nextzp) {
+			if (zp->counter < sflist->zone_locked)
+				break;
+			nextzp = zp->next;
+			sf->zones = nextzp;
+			kfree(zp);
+		}
+
+		for (sp = sf->samples; sp; sp = nextsp) {
+			if (sp->counter < sflist->sample_locked)
+				break;
+			nextsp = sp->next;
+			sf->samples = nextsp;
+			sflist->mem_used -= sp->v.truesize;
+			if (sflist->callback.sample_free)
+				sflist->callback.sample_free(sflist->callback.private_data,
+							     sp, sflist->memhdr);
+			kfree(sp);
+		}
+	}
+
+	sflist->zone_counter = sflist->zone_locked;
+	sflist->sample_counter = sflist->sample_locked;
+
+	rebuild_presets(sflist);
+
+	unlock_preset(sflist);
+	return 0;
+}