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pcm_utils: add function pcm_end_pointer()

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This commit is contained in:
Max Kellermann 2011-10-19 22:11:50 +02:00
parent f1da118a6c
commit 0debe9bd6f
2 changed files with 13 additions and 1 deletions
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3
src/pcm_format.c
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@ -22,6 +22,7 @@
#include "pcm_dither.h" #include "pcm_dither.h"
#include "pcm_buffer.h" #include "pcm_buffer.h"
#include "pcm_pack.h" #include "pcm_pack.h"
#include "pcm_utils.h"
static void static void
pcm_convert_8_to_16(int16_t *out, const int8_t *in, pcm_convert_8_to_16(int16_t *out, const int8_t *in,
@ -61,7 +62,7 @@ pcm_convert_to_16(struct pcm_buffer *buffer, struct pcm_dither *dither,
enum sample_format src_format, const void *src, enum sample_format src_format, const void *src,
size_t src_size, size_t *dest_size_r) size_t src_size, size_t *dest_size_r)
{ {
const void *src_end = (const char *)src + src_size; const void *src_end = pcm_end_pointer(src, src_size);
unsigned num_samples; unsigned num_samples;
int16_t *dest; int16_t *dest;
int32_t *dest32; int32_t *dest32;

11
src/pcm_utils.h
View File

@ -24,6 +24,17 @@
#include <stdint.h> #include <stdint.h>
/**
* Add a byte count to the specified pointer. This is a utility
* function to convert a source pointer and a byte count to an "end"
* pointer for use in loops.
*/
static inline const void *
pcm_end_pointer(const void *p, size_t size)
{
return (const char *)p + size;
}
/** /**
* Check if the value is within the range of the provided bit size, * Check if the value is within the range of the provided bit size,
* and caps it if necessary. * and caps it if necessary.