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-rw-r--r--include/sound/emu10k1.h4
-rw-r--r--sound/pci/emu10k1/emu10k1_patch.c30
-rw-r--r--sound/pci/emu10k1/memory.c49
3 files changed, 55 insertions, 28 deletions
diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h
index 1af9e6819392..9e3bd4f81460 100644
--- a/include/sound/emu10k1.h
+++ b/include/sound/emu10k1.h
@@ -1882,8 +1882,8 @@ int snd_emu10k1_alloc_pages_maybe_wider(struct snd_emu10k1 *emu, size_t size,
struct snd_dma_buffer *dmab);
struct snd_util_memblk *snd_emu10k1_synth_alloc(struct snd_emu10k1 *emu, unsigned int size);
int snd_emu10k1_synth_free(struct snd_emu10k1 *emu, struct snd_util_memblk *blk);
-int snd_emu10k1_synth_bzero(struct snd_emu10k1 *emu, struct snd_util_memblk *blk, int offset, int size);
-int snd_emu10k1_synth_copy_from_user(struct snd_emu10k1 *emu, struct snd_util_memblk *blk, int offset, const char __user *data, int size);
+int snd_emu10k1_synth_memset(struct snd_emu10k1 *emu, struct snd_util_memblk *blk, int offset, int size, u8 value);
+int snd_emu10k1_synth_copy_from_user(struct snd_emu10k1 *emu, struct snd_util_memblk *blk, int offset, const char __user *data, int size, u32 xor);
int snd_emu10k1_memblk_map(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk);
/* voice allocation */
diff --git a/sound/pci/emu10k1/emu10k1_patch.c b/sound/pci/emu10k1/emu10k1_patch.c
index 55bb60d31fe4..eb3d1ef8a33a 100644
--- a/sound/pci/emu10k1/emu10k1_patch.c
+++ b/sound/pci/emu10k1/emu10k1_patch.c
@@ -26,6 +26,8 @@ snd_emu10k1_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp,
struct snd_util_memhdr *hdr,
const void __user *data, long count)
{
+ u8 fill;
+ u32 xor;
int offset;
int truesize, size, blocksize;
unsigned int start_addr;
@@ -41,6 +43,14 @@ snd_emu10k1_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp,
sp->v.sample);
}
+ if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS) {
+ fill = 0x80;
+ xor = (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_UNSIGNED) ? 0 : 0x80808080;
+ } else {
+ fill = 0;
+ xor = (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_UNSIGNED) ? 0x80008000 : 0;
+ }
+
/* compute true data size to be loaded */
truesize = sp->v.size + BLANK_HEAD_SIZE;
if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK)
@@ -65,14 +75,14 @@ snd_emu10k1_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp,
size = BLANK_HEAD_SIZE;
if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
size *= 2;
- snd_emu10k1_synth_bzero(emu, sp->block, offset, size);
+ snd_emu10k1_synth_memset(emu, sp->block, offset, size, fill);
offset += size;
/* copy provided samples */
size = sp->v.size;
if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
size *= 2;
- if (snd_emu10k1_synth_copy_from_user(emu, sp->block, offset, data, size)) {
+ if (snd_emu10k1_synth_copy_from_user(emu, sp->block, offset, data, size, xor)) {
snd_emu10k1_synth_free(emu, sp->block);
sp->block = NULL;
return -EFAULT;
@@ -81,7 +91,7 @@ snd_emu10k1_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp,
/* clear rest of samples (if any) */
if (offset < blocksize)
- snd_emu10k1_synth_bzero(emu, sp->block, offset, blocksize - offset);
+ snd_emu10k1_synth_memset(emu, sp->block, offset, blocksize - offset, fill);
if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) {
/* if no blank loop is attached in the sample, add it */
@@ -91,20 +101,6 @@ snd_emu10k1_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp,
}
}
-#if 0 /* not supported yet */
- if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_UNSIGNED) {
- /* unsigned -> signed */
- if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS)) {
- unsigned short *wblock = (unsigned short*)block;
- for (i = 0; i < truesize; i++)
- wblock[i] ^= 0x8000;
- } else {
- for (i = 0; i < truesize; i++)
- block[i] ^= 0x80;
- }
- }
-#endif
-
/* recalculate offset */
start_addr = BLANK_HEAD_SIZE * 2;
if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
diff --git a/sound/pci/emu10k1/memory.c b/sound/pci/emu10k1/memory.c
index fc9444404151..d29711777161 100644
--- a/sound/pci/emu10k1/memory.c
+++ b/sound/pci/emu10k1/memory.c
@@ -565,10 +565,10 @@ static inline void *offset_ptr(struct snd_emu10k1 *emu, int page, int offset)
}
/*
- * bzero(blk + offset, size)
+ * memset(blk + offset, value, size)
*/
-int snd_emu10k1_synth_bzero(struct snd_emu10k1 *emu, struct snd_util_memblk *blk,
- int offset, int size)
+int snd_emu10k1_synth_memset(struct snd_emu10k1 *emu, struct snd_util_memblk *blk,
+ int offset, int size, u8 value)
{
int page, nextofs, end_offset, temp, temp1;
void *ptr;
@@ -588,20 +588,47 @@ int snd_emu10k1_synth_bzero(struct snd_emu10k1 *emu, struct snd_util_memblk *blk
temp = temp1;
ptr = offset_ptr(emu, page + p->first_page, offset);
if (ptr)
- memset(ptr, 0, temp);
+ memset(ptr, value, temp);
offset = nextofs;
page++;
} while (offset < end_offset);
return 0;
}
-EXPORT_SYMBOL(snd_emu10k1_synth_bzero);
+EXPORT_SYMBOL(snd_emu10k1_synth_memset);
+
+// Note that the value is assumed to be suitably repetitive.
+static void xor_range(void *ptr, int size, u32 value)
+{
+ if ((long)ptr & 1) {
+ *(u8 *)ptr ^= (u8)value;
+ ptr++;
+ size--;
+ }
+ if (size > 1 && ((long)ptr & 2)) {
+ *(u16 *)ptr ^= (u16)value;
+ ptr += 2;
+ size -= 2;
+ }
+ while (size > 3) {
+ *(u32 *)ptr ^= value;
+ ptr += 4;
+ size -= 4;
+ }
+ if (size > 1) {
+ *(u16 *)ptr ^= (u16)value;
+ ptr += 2;
+ size -= 2;
+ }
+ if (size > 0)
+ *(u8 *)ptr ^= (u8)value;
+}
/*
- * copy_from_user(blk + offset, data, size)
+ * copy_from_user(blk + offset, data, size) ^ xor
*/
int snd_emu10k1_synth_copy_from_user(struct snd_emu10k1 *emu, struct snd_util_memblk *blk,
- int offset, const char __user *data, int size)
+ int offset, const char __user *data, int size, u32 xor)
{
int page, nextofs, end_offset, temp, temp1;
void *ptr;
@@ -620,8 +647,12 @@ int snd_emu10k1_synth_copy_from_user(struct snd_emu10k1 *emu, struct snd_util_me
if (temp1 < temp)
temp = temp1;
ptr = offset_ptr(emu, page + p->first_page, offset);
- if (ptr && copy_from_user(ptr, data, temp))
- return -EFAULT;
+ if (ptr) {
+ if (copy_from_user(ptr, data, temp))
+ return -EFAULT;
+ if (xor)
+ xor_range(ptr, temp, xor);
+ }
offset = nextofs;
data += temp;
page++;
generated by cgit v1.2.3 (git 2.46.0) at 2025-09-26 20:52:03 +0000