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pcm/Pack: add "noexcept"

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This commit is contained in:
Max Kellermann 2017-10-26 12:28:21 +02:00
parent ae67f44c6e
commit fee9f1482c
2 changed files with 13 additions and 8 deletions
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12
src/pcm/PcmPack.cxx
View File

@ -21,7 +21,7 @@
#include "system/ByteOrder.hxx" #include "system/ByteOrder.hxx"
static void static void
pack_sample(uint8_t *dest, const int32_t *src0) pack_sample(uint8_t *dest, const int32_t *src0) noexcept
{ {
const uint8_t *src = (const uint8_t *)src0; const uint8_t *src = (const uint8_t *)src0;
@ -34,7 +34,7 @@ pack_sample(uint8_t *dest, const int32_t *src0)
} }
void void
pcm_pack_24(uint8_t *dest, const int32_t *src, const int32_t *src_end) pcm_pack_24(uint8_t *dest, const int32_t *src, const int32_t *src_end) noexcept
{ {
/* duplicate loop to help the compiler's optimizer (constant /* duplicate loop to help the compiler's optimizer (constant
parameter to the pack_sample() inline function) */ parameter to the pack_sample() inline function) */
@ -49,7 +49,7 @@ pcm_pack_24(uint8_t *dest, const int32_t *src, const int32_t *src_end)
* Construct a signed 24 bit integer from three bytes into a int32_t. * Construct a signed 24 bit integer from three bytes into a int32_t.
*/ */
static constexpr int32_t static constexpr int32_t
ConstructS24(uint8_t low, uint8_t mid, uint8_t high) ConstructS24(uint8_t low, uint8_t mid, uint8_t high) noexcept
{ {
return int32_t(low) | (int32_t(mid) << 8) | (int32_t(high) << 16) | return int32_t(low) | (int32_t(mid) << 8) | (int32_t(high) << 16) |
/* extend the sign bit */ /* extend the sign bit */
@ -87,7 +87,8 @@ ReadS24(const uint8_t *src) noexcept
} }
void void
pcm_unpack_24(int32_t *dest, const uint8_t *src, const uint8_t *src_end) pcm_unpack_24(int32_t *dest,
const uint8_t *src, const uint8_t *src_end) noexcept
{ {
while (src < src_end) { while (src < src_end) {
*dest++ = ReadS24(src); *dest++ = ReadS24(src);
@ -96,7 +97,8 @@ pcm_unpack_24(int32_t *dest, const uint8_t *src, const uint8_t *src_end)
} }
void void
pcm_unpack_24be(int32_t *dest, const uint8_t *src, const uint8_t *src_end) pcm_unpack_24be(int32_t *dest,
const uint8_t *src, const uint8_t *src_end) noexcept
{ {
while (src < src_end) { while (src < src_end) {
*dest++ = ReadS24BE(src); *dest++ = ReadS24BE(src);

9
src/pcm/PcmPack.hxx
View File

@ -37,7 +37,8 @@
* @param src the source buffer * @param src the source buffer
*/ */
void void
pcm_pack_24(uint8_t *dest, const int32_t *src, const int32_t *src_end); pcm_pack_24(uint8_t *dest,
const int32_t *src, const int32_t *src_end) noexcept;
/** /**
* Converts packed 24 bit samples (3 bytes per sample) to padded 24 * Converts packed 24 bit samples (3 bytes per sample) to padded 24
@ -47,13 +48,15 @@ pcm_pack_24(uint8_t *dest, const int32_t *src, const int32_t *src_end);
* @param src the source buffer (array of triples) * @param src the source buffer (array of triples)
*/ */
void void
pcm_unpack_24(int32_t *dest, const uint8_t *src, const uint8_t *src_end); pcm_unpack_24(int32_t *dest,
const uint8_t *src, const uint8_t *src_end) noexcept;
/** /**
* Like pcm_unpack_24(), but assume the source byte order is * Like pcm_unpack_24(), but assume the source byte order is
* big-endian. The destination byte order ia always native. * big-endian. The destination byte order ia always native.
*/ */
void void
pcm_unpack_24be(int32_t *dest, const uint8_t *src, const uint8_t *src_end); pcm_unpack_24be(int32_t *dest,
const uint8_t *src, const uint8_t *src_end) noexcept;
#endif #endif