mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-23 07:42:51 +00:00
Reapply r12489: Add pure, const and malloc attributes to proper functions
in libavutil. Fix a compilation failure in r12489. Originally committed as revision 12498 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Zuxy Meng
parent
d1928ac129
commit
85074d3c93
@ -24,6 +24,6 @@
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#include <stdint.h>
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unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf,
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unsigned int len);
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unsigned int len) av_pure;
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#endif /* FFMPEG_ADLER32_H */
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@ -34,7 +34,7 @@
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#include <byteswap.h>
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#else
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static av_always_inline uint16_t bswap_16(uint16_t x)
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static av_always_inline av_const uint16_t bswap_16(uint16_t x)
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{
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#if defined(ARCH_X86)
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asm("rorw $8, %0" : "+r"(x));
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@ -46,7 +46,7 @@ static av_always_inline uint16_t bswap_16(uint16_t x)
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return x;
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}
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static av_always_inline uint32_t bswap_32(uint32_t x)
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static av_always_inline av_const uint32_t bswap_32(uint32_t x)
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{
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#if defined(ARCH_X86)
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#ifdef HAVE_BSWAP
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@ -83,7 +83,7 @@ static av_always_inline uint32_t bswap_32(uint32_t x)
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return x;
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}
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static inline uint64_t bswap_64(uint64_t x)
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static inline uint64_t av_const bswap_64(uint64_t x)
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{
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#if 0
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x= ((x<< 8)&0xFF00FF00FF00FF00ULL) | ((x>> 8)&0x00FF00FF00FF00FFULL);
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@ -57,6 +57,22 @@
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#endif
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#endif
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#ifndef av_pure
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#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
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# define av_pure __attribute__((pure))
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#else
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# define av_pure
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#endif
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#endif
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#ifndef av_const
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#if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ > 5)
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# define av_const __attribute__((const))
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#else
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# define av_const
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#endif
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#endif
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#ifdef HAVE_AV_CONFIG_H
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# include "internal.h"
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#endif /* HAVE_AV_CONFIG_H */
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@ -94,7 +110,7 @@
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/* misc math functions */
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extern const uint8_t ff_log2_tab[256];
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static inline int av_log2(unsigned int v)
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static inline av_const int av_log2(unsigned int v)
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{
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int n = 0;
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if (v & 0xffff0000) {
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@ -110,7 +126,7 @@ static inline int av_log2(unsigned int v)
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return n;
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}
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static inline int av_log2_16bit(unsigned int v)
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static inline av_const int av_log2_16bit(unsigned int v)
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{
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int n = 0;
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if (v & 0xff00) {
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@ -123,7 +139,7 @@ static inline int av_log2_16bit(unsigned int v)
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}
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/* median of 3 */
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static inline int mid_pred(int a, int b, int c)
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static inline av_const int mid_pred(int a, int b, int c)
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{
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#ifdef HAVE_CMOV
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int i=b;
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@ -170,7 +186,7 @@ static inline int mid_pred(int a, int b, int c)
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* @param amax maximum value of the clip range
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* @return clipped value
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*/
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static inline int av_clip(int a, int amin, int amax)
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static inline av_const int av_clip(int a, int amin, int amax)
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{
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if (a < amin) return amin;
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else if (a > amax) return amax;
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@ -182,7 +198,7 @@ static inline int av_clip(int a, int amin, int amax)
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* @param a value to clip
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* @return clipped value
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*/
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static inline uint8_t av_clip_uint8(int a)
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static inline av_const uint8_t av_clip_uint8(int a)
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{
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if (a&(~255)) return (-a)>>31;
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else return a;
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@ -193,19 +209,19 @@ static inline uint8_t av_clip_uint8(int a)
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* @param a value to clip
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* @return clipped value
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*/
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static inline int16_t av_clip_int16(int a)
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static inline av_const int16_t av_clip_int16(int a)
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{
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if ((a+32768) & ~65535) return (a>>31) ^ 32767;
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else return a;
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}
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/* math */
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int64_t ff_gcd(int64_t a, int64_t b);
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int64_t av_const ff_gcd(int64_t a, int64_t b);
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/**
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* converts fourcc string to int
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*/
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static inline int ff_get_fourcc(const char *s){
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static inline av_pure int ff_get_fourcc(const char *s){
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#ifdef HAVE_AV_CONFIG_H
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assert( strlen(s)==4 );
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#endif
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@ -37,7 +37,7 @@ typedef enum {
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int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size);
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const AVCRC *av_crc_get_table(AVCRCId crc_id);
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uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length);
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uint32_t av_crc(const AVCRC *ctx, uint32_t start_crc, const uint8_t *buffer, size_t length) av_pure;
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#endif /* FFMPEG_CRC_H */
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@ -19,6 +19,7 @@
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <inttypes.h>
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#include "common.h"
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#include "des.h"
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#define T(a, b, c, d, e, f, g, h) 64-a,64-b,64-c,64-d,64-e,64-f,64-g,64-h
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@ -34,6 +34,6 @@
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* If your input data is in 8-bit blocks treat it as big-endian
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* (use e.g. AV_RB64 and AV_WB64).
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*/
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uint64_t ff_des_encdec(uint64_t in, uint64_t key, int decrypt);
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uint64_t ff_des_encdec(uint64_t in, uint64_t key, int decrypt) av_const;
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#endif /* FFMPEG_DES_H */
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@ -36,26 +36,26 @@ typedef struct AVInteger{
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uint16_t v[AV_INTEGER_SIZE];
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} AVInteger;
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AVInteger av_add_i(AVInteger a, AVInteger b);
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AVInteger av_sub_i(AVInteger a, AVInteger b);
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AVInteger av_add_i(AVInteger a, AVInteger b) av_const;
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AVInteger av_sub_i(AVInteger a, AVInteger b) av_const;
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/**
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* returns the rounded down value of the logarithm of base 2 of the given AVInteger.
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* this is simply the index of the most significant bit which is 1. Or 0 of all bits are 0
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*/
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int av_log2_i(AVInteger a);
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AVInteger av_mul_i(AVInteger a, AVInteger b);
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int av_log2_i(AVInteger a) av_const;
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AVInteger av_mul_i(AVInteger a, AVInteger b) av_const;
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/**
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* returns 0 if a==b, 1 if a>b and -1 if a<b.
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*/
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int av_cmp_i(AVInteger a, AVInteger b);
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int av_cmp_i(AVInteger a, AVInteger b) av_const;
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/**
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* bitwise shift.
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* @param s the number of bits by which the value should be shifted right, may be negative for shifting left
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*/
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AVInteger av_shr_i(AVInteger a, int s);
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AVInteger av_shr_i(AVInteger a, int s) av_const;
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/**
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* returns a % b.
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@ -66,18 +66,18 @@ AVInteger av_mod_i(AVInteger *quot, AVInteger a, AVInteger b);
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/**
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* returns a/b.
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*/
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AVInteger av_div_i(AVInteger a, AVInteger b);
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AVInteger av_div_i(AVInteger a, AVInteger b) av_const;
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/**
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* converts the given int64_t to an AVInteger.
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*/
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AVInteger av_int2i(int64_t a);
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AVInteger av_int2i(int64_t a) av_const;
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/**
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* converts the given AVInteger to an int64_t.
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* if the AVInteger is too large to fit into an int64_t,
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* then only the least significant 64bit will be used
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*/
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int64_t av_i2int(AVInteger a);
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int64_t av_i2int(AVInteger a) av_const;
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#endif /* FFMPEG_INTEGER_H */
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@ -172,7 +172,7 @@ extern const uint8_t ff_sqrt_tab[256];
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static inline int av_log2_16bit(unsigned int v);
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static inline unsigned int ff_sqrt(unsigned int a)
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static inline av_const unsigned int ff_sqrt(unsigned int a)
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{
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unsigned int b;
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@ -267,35 +267,35 @@ if((y)<(x)){\
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}
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#ifndef HAVE_LLRINT
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static av_always_inline long long llrint(double x)
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static av_always_inline av_const long long llrint(double x)
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{
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return rint(x);
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}
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#endif /* HAVE_LLRINT */
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#ifndef HAVE_LRINT
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static av_always_inline long int lrint(double x)
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static av_always_inline av_const long int lrint(double x)
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{
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return rint(x);
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}
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#endif /* HAVE_LRINT */
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#ifndef HAVE_LRINTF
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static av_always_inline long int lrintf(float x)
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static av_always_inline av_const long int lrintf(float x)
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{
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return (int)(rint(x));
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}
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#endif /* HAVE_LRINTF */
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#ifndef HAVE_ROUND
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static av_always_inline double round(double x)
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static av_always_inline av_const double round(double x)
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{
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return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
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}
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#endif /* HAVE_ROUND */
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#ifndef HAVE_ROUNDF
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static av_always_inline float roundf(float x)
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static av_always_inline av_const float roundf(float x)
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{
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return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
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}
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@ -30,11 +30,11 @@ typedef struct AVExtFloat {
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uint8_t mantissa[8];
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} AVExtFloat;
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double av_int2dbl(int64_t v);
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float av_int2flt(int32_t v);
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double av_ext2dbl(const AVExtFloat ext);
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int64_t av_dbl2int(double d);
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int32_t av_flt2int(float d);
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AVExtFloat av_dbl2ext(double d);
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double av_int2dbl(int64_t v) av_const;
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float av_int2flt(int32_t v) av_const;
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double av_ext2dbl(const AVExtFloat ext) av_const;
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int64_t av_dbl2int(double d) av_const;
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int32_t av_flt2int(float d) av_const;
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AVExtFloat av_dbl2ext(double d) av_const;
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#endif /* FFMPEG_INTFLOAT_READWRITE_H */
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@ -36,17 +36,17 @@ enum AVRounding {
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* rescale a 64bit integer with rounding to nearest.
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* a simple a*b/c isn't possible as it can overflow
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*/
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int64_t av_rescale(int64_t a, int64_t b, int64_t c);
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int64_t av_rescale(int64_t a, int64_t b, int64_t c) av_const;
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/**
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* rescale a 64bit integer with specified rounding.
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* a simple a*b/c isn't possible as it can overflow
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*/
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int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
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int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding) av_const;
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/**
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* rescale a 64bit integer by 2 rational numbers.
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*/
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int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq);
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int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq) av_const;
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#endif /* FFMPEG_MATHEMATICS_H */
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@ -42,6 +42,12 @@
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#define DECLARE_ASM_CONST(n,t,v) static const t v
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#endif
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#ifdef __GNUC__
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#define av_malloc_attrib __attribute__((__malloc__))
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#else
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#define av_malloc_attrib
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#endif
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/**
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* Allocate a block of \p size bytes with alignment suitable for all
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* memory accesses (including vectors if available on the CPU).
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@ -50,7 +56,7 @@
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* it.
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* @see av_mallocz()
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*/
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void *av_malloc(unsigned int size);
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void *av_malloc(unsigned int size) av_malloc_attrib;
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/**
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* Allocate or reallocate a block of memory.
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@ -85,7 +91,7 @@ void av_free(void *ptr);
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* it.
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* @see av_malloc()
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*/
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void *av_mallocz(unsigned int size);
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void *av_mallocz(unsigned int size) av_malloc_attrib;
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/**
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* Duplicate the string \p s.
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@ -93,7 +99,7 @@ void *av_mallocz(unsigned int size);
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* @return Pointer to a newly allocated string containing a
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* copy of \p s or NULL if it cannot be allocated.
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*/
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char *av_strdup(const char *s);
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char *av_strdup(const char *s) av_malloc_attrib;
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/**
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* Free a memory block which has been allocated with av_malloc(z)() or
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@ -29,6 +29,7 @@
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#define FFMPEG_RATIONAL_H
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#include <stdint.h>
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#include "common.h"
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/**
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* Rational number num/den.
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@ -78,7 +79,7 @@ int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max)
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* @param c second rational.
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* @return b*c.
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*/
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AVRational av_mul_q(AVRational b, AVRational c);
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AVRational av_mul_q(AVRational b, AVRational c) av_const;
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/**
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* Divides one rational by another.
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@ -86,7 +87,7 @@ AVRational av_mul_q(AVRational b, AVRational c);
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* @param c second rational.
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* @return b/c.
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*/
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AVRational av_div_q(AVRational b, AVRational c);
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AVRational av_div_q(AVRational b, AVRational c) av_const;
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/**
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* Adds two rationals.
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@ -94,7 +95,7 @@ AVRational av_div_q(AVRational b, AVRational c);
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* @param c second rational.
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* @return b+c.
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*/
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AVRational av_add_q(AVRational b, AVRational c);
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AVRational av_add_q(AVRational b, AVRational c) av_const;
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/**
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* Subtracts one rational from another.
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@ -102,7 +103,7 @@ AVRational av_add_q(AVRational b, AVRational c);
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* @param c second rational.
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* @return b-c.
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*/
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AVRational av_sub_q(AVRational b, AVRational c);
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AVRational av_sub_q(AVRational b, AVRational c) av_const;
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/**
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* Converts a double precision floating point number to a rational.
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@ -110,6 +111,6 @@ AVRational av_sub_q(AVRational b, AVRational c);
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* @param max the maximum allowed numerator and denominator
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* @return (AVRational) d.
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*/
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AVRational av_d2q(double d, int max);
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AVRational av_d2q(double d, int max) av_const;
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#endif /* FFMPEG_RATIONAL_H */
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@ -32,7 +32,7 @@ typedef struct SoftFloat{
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int32_t mant;
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}SoftFloat;
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static SoftFloat av_normalize_sf(SoftFloat a){
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static av_const SoftFloat av_normalize_sf(SoftFloat a){
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if(a.mant){
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#if 1
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while((a.mant + 0x20000000U)<0x40000000U){
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@ -54,7 +54,7 @@ static SoftFloat av_normalize_sf(SoftFloat a){
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return a;
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}
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static inline SoftFloat av_normalize1_sf(SoftFloat a){
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static inline av_const SoftFloat av_normalize1_sf(SoftFloat a){
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#if 1
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if(a.mant + 0x40000000 < 0){
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a.exp++;
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@ -76,7 +76,7 @@ static inline SoftFloat av_normalize1_sf(SoftFloat a){
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* normalized then the output wont be worse then the other input
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* if both are normalized then the output will be normalized
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*/
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static inline SoftFloat av_mul_sf(SoftFloat a, SoftFloat b){
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static inline av_const SoftFloat av_mul_sf(SoftFloat a, SoftFloat b){
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a.exp += b.exp;
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a.mant = (a.mant * (int64_t)b.mant) >> ONE_BITS;
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return av_normalize1_sf(a);
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@ -87,31 +87,31 @@ static inline SoftFloat av_mul_sf(SoftFloat a, SoftFloat b){
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* b has to be normalized and not zero
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* @return will not be more denormalized then a
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*/
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static SoftFloat av_div_sf(SoftFloat a, SoftFloat b){
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static av_const SoftFloat av_div_sf(SoftFloat a, SoftFloat b){
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a.exp -= b.exp+1;
|
||||
a.mant = ((int64_t)a.mant<<(ONE_BITS+1)) / b.mant;
|
||||
return av_normalize1_sf(a);
|
||||
}
|
||||
|
||||
static inline int av_cmp_sf(SoftFloat a, SoftFloat b){
|
||||
static inline av_const int av_cmp_sf(SoftFloat a, SoftFloat b){
|
||||
int t= a.exp - b.exp;
|
||||
if(t<0) return (a.mant >> (-t)) - b.mant ;
|
||||
else return a.mant - (b.mant >> t);
|
||||
}
|
||||
|
||||
static inline SoftFloat av_add_sf(SoftFloat a, SoftFloat b){
|
||||
static inline av_const SoftFloat av_add_sf(SoftFloat a, SoftFloat b){
|
||||
int t= a.exp - b.exp;
|
||||
if(t<0) return av_normalize1_sf((SoftFloat){b.exp, b.mant + (a.mant >> (-t))});
|
||||
else return av_normalize1_sf((SoftFloat){a.exp, a.mant + (b.mant >> t )});
|
||||
}
|
||||
|
||||
static inline SoftFloat av_sub_sf(SoftFloat a, SoftFloat b){
|
||||
static inline av_const SoftFloat av_sub_sf(SoftFloat a, SoftFloat b){
|
||||
return av_add_sf(a, (SoftFloat){b.exp, -b.mant});
|
||||
}
|
||||
|
||||
//FIXME sqrt, log, exp, pow, sin, cos
|
||||
|
||||
static inline SoftFloat av_int2sf(int v, int frac_bits){
|
||||
static inline av_const SoftFloat av_int2sf(int v, int frac_bits){
|
||||
return av_normalize_sf((SoftFloat){ONE_BITS-frac_bits, v});
|
||||
}
|
||||
|
||||
@ -119,7 +119,7 @@ static inline SoftFloat av_int2sf(int v, int frac_bits){
|
||||
*
|
||||
* rounding is to -inf
|
||||
*/
|
||||
static inline int av_sf2int(SoftFloat v, int frac_bits){
|
||||
static inline av_const int av_sf2int(SoftFloat v, int frac_bits){
|
||||
v.exp += frac_bits - ONE_BITS;
|
||||
if(v.exp >= 0) return v.mant << v.exp ;
|
||||
else return v.mant >>(-v.exp);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user