oysteikt/mpd
0
0
Fork 0
Code Issues Pull Requests Releases Activity

pcm_*: add "restrict" keywords

Browse Source 
Allow more compiler optimizations.
This commit is contained in:
Max Kellermann 2011-10-20 01:09:23 +02:00
parent 7b33c343f8
commit 72e80db823
2 changed files with 29 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
src/pcm_channels.c
View File

@ -25,8 +25,9 @@
#include <assert.h>
static void
pcm_convert_channels_16_1_to_2(int16_t *dest, const int16_t *src,
const int16_t *src_end)
pcm_convert_channels_16_1_to_2(int16_t *restrict dest,
const int16_t *restrict src,
const int16_t *restrict src_end)
{
while (src < src_end) {
int16_t value = *src++;
@ -37,8 +38,9 @@ pcm_convert_channels_16_1_to_2(int16_t *dest, const int16_t *src,
}
static void
pcm_convert_channels_16_2_to_1(int16_t *dest, const int16_t *src,
const int16_t *src_end)
pcm_convert_channels_16_2_to_1(int16_t *restrict dest,
const int16_t *restrict src,
const int16_t *restrict src_end)
{
while (src < src_end) {
int32_t a = *src++, b = *src++;
@ -48,9 +50,10 @@ pcm_convert_channels_16_2_to_1(int16_t *dest, const int16_t *src,
}
static void
pcm_convert_channels_16_n_to_2(int16_t *dest,
unsigned src_channels, const int16_t *src,
const int16_t *src_end)
pcm_convert_channels_16_n_to_2(int16_t *restrict dest,
unsigned src_channels,
const int16_t *restrict src,
const int16_t *restrict src_end)
{
unsigned c;
@ -98,8 +101,9 @@ pcm_convert_channels_16(struct pcm_buffer *buffer,
}
static void
pcm_convert_channels_24_1_to_2(int32_t *dest, const int32_t *src,
const int32_t *src_end)
pcm_convert_channels_24_1_to_2(int32_t *restrict dest,
const int32_t *restrict src,
const int32_t *restrict src_end)
{
while (src < src_end) {
int32_t value = *src++;
@ -110,8 +114,9 @@ pcm_convert_channels_24_1_to_2(int32_t *dest, const int32_t *src,
}
static void
pcm_convert_channels_24_2_to_1(int32_t *dest, const int32_t *src,
const int32_t *src_end)
pcm_convert_channels_24_2_to_1(int32_t *restrict dest,
const int32_t *restrict src,
const int32_t *restrict src_end)
{
while (src < src_end) {
int32_t a = *src++, b = *src++;
@ -121,9 +126,10 @@ pcm_convert_channels_24_2_to_1(int32_t *dest, const int32_t *src,
}
static void
pcm_convert_channels_24_n_to_2(int32_t *dest,
unsigned src_channels, const int32_t *src,
const int32_t *src_end)
pcm_convert_channels_24_n_to_2(int32_t *restrict dest,
unsigned src_channels,
const int32_t *restrict src,
const int32_t *restrict src_end)
{
unsigned c;
@ -178,8 +184,9 @@ pcm_convert_channels_32_1_to_2(int32_t *dest, const int32_t *src,
}
static void
pcm_convert_channels_32_2_to_1(int32_t *dest, const int32_t *src,
const int32_t *src_end)
pcm_convert_channels_32_2_to_1(int32_t *restrict dest,
const int32_t *restrict src,
const int32_t *restrict src_end)
{
while (src < src_end) {
int64_t a = *src++, b = *src++;

8
src/pcm_format.c
View File

@ -137,7 +137,9 @@ pcm_convert_16_to_24(int32_t *out, const int16_t *in, const int16_t *in_end)
}
static void
pcm_convert_32_to_24(int32_t *out, const int32_t *in, const int32_t *in_end)
pcm_convert_32_to_24(int32_t *restrict out,
const int32_t *restrict in,
const int32_t *restrict in_end)
{
while (in < in_end)
*out++ = *in++ >> 8;
@ -208,7 +210,9 @@ pcm_convert_16_to_32(int32_t *out, const int16_t *in, const int16_t *in_end)
}
static void
pcm_convert_24_to_32(int32_t *out, const int32_t *in, const int32_t *in_end)
pcm_convert_24_to_32(int32_t *restrict out,
const int32_t *restrict in,
const int32_t *restrict in_end)
{
while (in < in_end)
*out++ = *in++ << 8;