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dsputil: add bswap16_buf()

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There are several places where a buffer is byte-swapped in 16-bit units.
This allows them to share code which can be optimised for various
architectures.

Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2010-04-21 00:09:00 +01:00
parent dff68563d8
commit 381d37fda9
2 changed files with 8 additions and 0 deletions
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7
libavcodec/dsputil.c
View File

@ -222,6 +222,12 @@ static void bswap_buf(uint32_t *dst, const uint32_t *src, int w){
}
}
static void bswap16_buf(uint16_t *dst, const uint16_t *src, int len)
{
while (len--)
*dst++ = av_bswap16(*src++);
}
static int sse4_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h)
{
int s, i;
@ -4324,6 +4330,7 @@ av_cold void dsputil_init(DSPContext* c, AVCodecContext *avctx)
c->add_hfyu_left_prediction = add_hfyu_left_prediction_c;
c->add_hfyu_left_prediction_bgr32 = add_hfyu_left_prediction_bgr32_c;
c->bswap_buf= bswap_buf;
c->bswap16_buf = bswap16_buf;
#if CONFIG_PNG_DECODER
c->add_png_paeth_prediction= ff_add_png_paeth_prediction;
#endif

1
libavcodec/dsputil.h
View File

@ -369,6 +369,7 @@ typedef struct DSPContext {
/* this might write to dst[w] */
void (*add_png_paeth_prediction)(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp);
void (*bswap_buf)(uint32_t *dst, const uint32_t *src, int w);
void (*bswap16_buf)(uint16_t *dst, const uint16_t *src, int len);
void (*h263_v_loop_filter)(uint8_t *src, int stride, int qscale);
void (*h263_h_loop_filter)(uint8_t *src, int stride, int qscale);