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authorMax Kellermann <max@duempel.org>2011-10-09 19:32:46 +0200
committerMax Kellermann <max@duempel.org>2011-10-19 22:17:30 +0200
commitdfb98417b38270aa400dcabcd7fbef14b1c7bce4 (patch)
treeedba82d7bb477f276a37c076e22d90eced6ab9cc /src/pcm_channels.c
parent9716c3a30ea9d01a297a1ffc52f95049054c707c (diff)
downloadmpd-dfb98417b38270aa400dcabcd7fbef14b1c7bce4.tar.gz
mpd-dfb98417b38270aa400dcabcd7fbef14b1c7bce4.tar.xz
mpd-dfb98417b38270aa400dcabcd7fbef14b1c7bce4.zip
pcm_channels: pass an "end" pointer instead of a sample count
Diffstat (limited to 'src/pcm_channels.c')
-rw-r--r--src/pcm_channels.c79
1 files changed, 40 insertions, 39 deletions
diff --git a/src/pcm_channels.c b/src/pcm_channels.c
index 31fab5e20..0ec1eb527 100644
--- a/src/pcm_channels.c
+++ b/src/pcm_channels.c
@@ -20,14 +20,15 @@
#include "config.h"
#include "pcm_channels.h"
#include "pcm_buffer.h"
+#include "pcm_utils.h"
#include <assert.h>
static void
pcm_convert_channels_16_1_to_2(int16_t *dest, const int16_t *src,
- unsigned num_frames)
+ const int16_t *src_end)
{
- while (num_frames-- > 0) {
+ while (src < src_end) {
int16_t value = *src++;
*dest++ = value;
@@ -37,9 +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,
- unsigned num_frames)
+ const int16_t *src_end)
{
- while (num_frames-- > 0) {
+ while (src < src_end) {
int32_t a = *src++, b = *src++;
*dest++ = (a + b) / 2;
@@ -49,13 +50,13 @@ 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,
- unsigned num_frames)
+ const int16_t *src_end)
{
unsigned c;
assert(src_channels > 0);
- while (num_frames-- > 0) {
+ while (src < src_end) {
int32_t sum = 0;
int16_t value;
@@ -77,19 +78,19 @@ pcm_convert_channels_16(struct pcm_buffer *buffer,
{
assert(src_size % (sizeof(*src) * src_channels) == 0);
- unsigned num_frames = src_size / src_channels / sizeof(*src);
- unsigned dest_size = num_frames * dest_channels * sizeof(*src);
- int16_t *dest = pcm_buffer_get(buffer, dest_size);
-
+ size_t dest_size = src_size / src_channels * dest_channels;
*dest_size_r = dest_size;
+ int16_t *dest = pcm_buffer_get(buffer, dest_size);
+ const int16_t *src_end = pcm_end_pointer(src, src_size);
+
if (src_channels == 1 && dest_channels == 2)
- pcm_convert_channels_16_1_to_2(dest, src, num_frames);
+ pcm_convert_channels_16_1_to_2(dest, src, src_end);
else if (src_channels == 2 && dest_channels == 1)
- pcm_convert_channels_16_2_to_1(dest, src, num_frames);
+ pcm_convert_channels_16_2_to_1(dest, src, src_end);
else if (dest_channels == 2)
pcm_convert_channels_16_n_to_2(dest, src_channels, src,
- num_frames);
+ src_end);
else
return NULL;
@@ -98,9 +99,9 @@ pcm_convert_channels_16(struct pcm_buffer *buffer,
static void
pcm_convert_channels_24_1_to_2(int32_t *dest, const int32_t *src,
- unsigned num_frames)
+ const int32_t *src_end)
{
- while (num_frames-- > 0) {
+ while (src < src_end) {
int32_t value = *src++;
*dest++ = value;
@@ -110,9 +111,9 @@ 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,
- unsigned num_frames)
+ const int32_t *src_end)
{
- while (num_frames-- > 0) {
+ while (src < src_end) {
int32_t a = *src++, b = *src++;
*dest++ = (a + b) / 2;
@@ -122,13 +123,13 @@ 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,
- unsigned num_frames)
+ const int32_t *src_end)
{
unsigned c;
assert(src_channels > 0);
- while (num_frames-- > 0) {
+ while (src < src_end) {
int32_t sum = 0;
int32_t value;
@@ -150,19 +151,19 @@ pcm_convert_channels_24(struct pcm_buffer *buffer,
{
assert(src_size % (sizeof(*src) * src_channels) == 0);
- unsigned num_frames = src_size / src_channels / sizeof(*src);
- unsigned dest_size = num_frames * dest_channels * sizeof(*src);
- int32_t *dest = pcm_buffer_get(buffer, dest_size);
-
+ size_t dest_size = src_size / src_channels * dest_channels;
*dest_size_r = dest_size;
+ int32_t *dest = pcm_buffer_get(buffer, dest_size);
+ const int32_t *src_end = pcm_end_pointer(src, src_size);
+
if (src_channels == 1 && dest_channels == 2)
- pcm_convert_channels_24_1_to_2(dest, src, num_frames);
+ pcm_convert_channels_24_1_to_2(dest, src, src_end);
else if (src_channels == 2 && dest_channels == 1)
- pcm_convert_channels_24_2_to_1(dest, src, num_frames);
+ pcm_convert_channels_24_2_to_1(dest, src, src_end);
else if (dest_channels == 2)
pcm_convert_channels_24_n_to_2(dest, src_channels, src,
- num_frames);
+ src_end);
else
return NULL;
@@ -171,16 +172,16 @@ pcm_convert_channels_24(struct pcm_buffer *buffer,
static void
pcm_convert_channels_32_1_to_2(int32_t *dest, const int32_t *src,
- unsigned num_frames)
+ const int32_t *src_end)
{
- pcm_convert_channels_24_1_to_2(dest, src, num_frames);
+ pcm_convert_channels_24_1_to_2(dest, src, src_end);
}
static void
pcm_convert_channels_32_2_to_1(int32_t *dest, const int32_t *src,
- unsigned num_frames)
+ const int32_t *src_end)
{
- while (num_frames-- > 0) {
+ while (src < src_end) {
int64_t a = *src++, b = *src++;
*dest++ = (a + b) / 2;
@@ -190,13 +191,13 @@ pcm_convert_channels_32_2_to_1(int32_t *dest, const int32_t *src,
static void
pcm_convert_channels_32_n_to_2(int32_t *dest,
unsigned src_channels, const int32_t *src,
- unsigned num_frames)
+ const int32_t *src_end)
{
unsigned c;
assert(src_channels > 0);
- while (num_frames-- > 0) {
+ while (src < src_end) {
int64_t sum = 0;
int32_t value;
@@ -218,19 +219,19 @@ pcm_convert_channels_32(struct pcm_buffer *buffer,
{
assert(src_size % (sizeof(*src) * src_channels) == 0);
- unsigned num_frames = src_size / src_channels / sizeof(*src);
- unsigned dest_size = num_frames * dest_channels * sizeof(*src);
- int32_t *dest = pcm_buffer_get(buffer, dest_size);
-
+ size_t dest_size = src_size / src_channels * dest_channels;
*dest_size_r = dest_size;
+ int32_t *dest = pcm_buffer_get(buffer, dest_size);
+ const int32_t *src_end = pcm_end_pointer(src, src_size);
+
if (src_channels == 1 && dest_channels == 2)
- pcm_convert_channels_32_1_to_2(dest, src, num_frames);
+ pcm_convert_channels_32_1_to_2(dest, src, src_end);
else if (src_channels == 2 && dest_channels == 1)
- pcm_convert_channels_32_2_to_1(dest, src, num_frames);
+ pcm_convert_channels_32_2_to_1(dest, src, src_end);
else if (dest_channels == 2)
pcm_convert_channels_32_n_to_2(dest, src_channels, src,
- num_frames);
+ src_end);
else
return NULL;