diff options
Diffstat (limited to 'src/pcm_channels.c')
| -rw-r--r-- | src/pcm_channels.c | 79 |
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; |