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Add a bunch of const qualifiers to function arguments. 

Taken from the upstream libmpeg2 version of the file.

Originally committed as revision 15585 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Diego Biurrun 2008-10-07 21:41:25 +00:00
parent 58e4b706c5
commit 098b4169f1
1 changed files with 17 additions and 12 deletions
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29
libavcodec/i386/idct_mmx.c
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@ -85,7 +85,8 @@ static inline void idct_row (int16_t * row, int offset,
c5, -c1, c3, -c1, \ c5, -c1, c3, -c1, \
c7, c3, c7, -c5 } c7, c3, c7, -c5 }
static inline void mmxext_row_head (int16_t * row, int offset, const int16_t * table) static inline void mmxext_row_head (int16_t * const row, const int offset,
const int16_t * const table)
{ {
movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */ movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
@ -101,7 +102,8 @@ static inline void mmxext_row_head (int16_t * row, int offset, const int16_t * t
pshufw_r2r (mm2, mm2, 0x4e); /* mm2 = x2 x0 x6 x4 */ pshufw_r2r (mm2, mm2, 0x4e); /* mm2 = x2 x0 x6 x4 */
} }
static inline void mmxext_row (const int16_t * table, const int32_t * rounder) static inline void mmxext_row (const int16_t * const table,
const int32_t * const rounder)
{ {
movq_m2r (*(table+8), mm1); /* mm1 = -C5 -C1 C3 C1 */ movq_m2r (*(table+8), mm1); /* mm1 = -C5 -C1 C3 C1 */
pmaddwd_r2r (mm2, mm4); /* mm4 = C4*x0+C6*x2 C4*x4+C6*x6 */ pmaddwd_r2r (mm2, mm4); /* mm4 = C4*x0+C6*x2 C4*x4+C6*x6 */
@ -140,7 +142,7 @@ static inline void mmxext_row (const int16_t * table, const int32_t * rounder)
psubd_r2r (mm5, mm4); /* mm4 = a3-b3 a2-b2 + rounder */ psubd_r2r (mm5, mm4); /* mm4 = a3-b3 a2-b2 + rounder */
} }
static inline void mmxext_row_tail (int16_t * row, int store) static inline void mmxext_row_tail (int16_t * const row, const int store)
{ {
psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */ psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
@ -158,8 +160,9 @@ static inline void mmxext_row_tail (int16_t * row, int store)
movq_r2m (mm4, *(row+store+4)); /* save y7 y6 y5 y4 */ movq_r2m (mm4, *(row+store+4)); /* save y7 y6 y5 y4 */
} }
static inline void mmxext_row_mid (int16_t * row, int store, static inline void mmxext_row_mid (int16_t * const row, const int store,
int offset, const int16_t * table) const int offset,
const int16_t * const table)
{ {
movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */ movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */ psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
@ -197,7 +200,8 @@ static inline void mmxext_row_mid (int16_t * row, int store,
c5, -c1, c7, -c5, \ c5, -c1, c7, -c5, \
c7, c3, c3, -c1 } c7, c3, c3, -c1 }
static inline void mmx_row_head (int16_t * row, int offset, const int16_t * table) static inline void mmx_row_head (int16_t * const row, const int offset,
const int16_t * const table)
{ {
movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */ movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
@ -216,7 +220,8 @@ static inline void mmx_row_head (int16_t * row, int offset, const int16_t * tabl
punpckhdq_r2r (mm2, mm2); /* mm2 = x6 x4 x6 x4 */ punpckhdq_r2r (mm2, mm2); /* mm2 = x6 x4 x6 x4 */
} }
static inline void mmx_row (const int16_t * table, const int32_t * rounder) static inline void mmx_row (const int16_t * const table,
const int32_t * const rounder)
{ {
pmaddwd_r2r (mm2, mm4); /* mm4 = -C4*x4-C2*x6 C4*x4+C6*x6 */ pmaddwd_r2r (mm2, mm4); /* mm4 = -C4*x4-C2*x6 C4*x4+C6*x6 */
punpckldq_r2r (mm5, mm5); /* mm5 = x3 x1 x3 x1 */ punpckldq_r2r (mm5, mm5); /* mm5 = x3 x1 x3 x1 */
@ -255,7 +260,7 @@ static inline void mmx_row (const int16_t * table, const int32_t * rounder)
psubd_r2r (mm5, mm7); /* mm7 = a3-b3 a2-b2 + rounder */ psubd_r2r (mm5, mm7); /* mm7 = a3-b3 a2-b2 + rounder */
} }
static inline void mmx_row_tail (int16_t * row, int store) static inline void mmx_row_tail (int16_t * const row, const int store)
{ {
psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */ psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
@ -279,8 +284,8 @@ static inline void mmx_row_tail (int16_t * row, int store)
movq_r2m (mm7, *(row+store+4)); /* save y7 y6 y5 y4 */ movq_r2m (mm7, *(row+store+4)); /* save y7 y6 y5 y4 */
} }
static inline void mmx_row_mid (int16_t * row, int store, static inline void mmx_row_mid (int16_t * const row, const int store,
int offset, const int16_t * table) const int offset, const int16_t * const table)
{ {
movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */ movq_m2r (*(row+offset), mm2); /* mm2 = x6 x4 x2 x0 */
psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */ psrad_i2r (ROW_SHIFT, mm0); /* mm0 = y3 y2 */
@ -387,7 +392,7 @@ static inline void idct_col (int16_t * col, int offset)
/* MMX column IDCT */ /* MMX column IDCT */
static inline void idct_col (int16_t * col, int offset) static inline void idct_col (int16_t * const col, const int offset)
{ {
#define T1 13036 #define T1 13036
#define T2 27146 #define T2 27146
@ -556,7 +561,7 @@ static const int32_t rounder5[] ATTR_ALIGN(8) =
#undef ROW_SHIFT #undef ROW_SHIFT
#define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid) \ #define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid) \
void idct (int16_t * block) \ void idct (int16_t * const block) \
{ \ { \
static const int16_t table04[] ATTR_ALIGN(16) = \ static const int16_t table04[] ATTR_ALIGN(16) = \
table (22725, 21407, 19266, 16384, 12873, 8867, 4520); \ table (22725, 21407, 19266, 16384, 12873, 8867, 4520); \