Skip to content

F
ffmpeg.wasm-core
Commit 425b45d4 authored by Yordan Makariev's avatar Yordan Makariev Committed by Ronald S. Bultje
Browse files
Options

Code clean-up for crc.c, lfg.c, log.c, random_see.d, rational.c and tree.c. 

Signed-off-by: 's avatarRonald S. Bultje <rsbultje@gmail.com>
parent 4a59eca9
Hide whitespace changes
Inline Side-by-side
Showing with 287 additions and 236 deletions
libavutil/crc.c
View file @ 425b45d4
...@@ -56,32 +56,34 @@ static AVCRC av_crc_table[AV_CRC_MAX][257]; ...@@ -56,32 +56,34 @@ static AVCRC av_crc_table[AV_CRC_MAX][257];
* @param ctx_size size of ctx in bytes * @param ctx_size size of ctx in bytes
* @return <0 on failure * @return <0 on failure
*/ */
int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){ int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size)
{
unsigned i, j; unsigned i, j;
uint32_t c; uint32_t c;
if (bits < 8 || bits > 32 || poly >= (1LL<<bits)) if (bits < 8 || bits > 32 || poly >= (1LL << bits))
return -1; return -1;
if (ctx_size != sizeof(AVCRC)*257 && ctx_size != sizeof(AVCRC)*1024) if (ctx_size != sizeof(AVCRC) * 257 && ctx_size != sizeof(AVCRC) * 1024)
return -1; return -1;
for (i = 0; i < 256; i++) { for (i = 0; i < 256; i++) {
if (le) { if (le) {
for (c = i, j = 0; j < 8; j++) for (c = i, j = 0; j < 8; j++)
c = (c>>1)^(poly & (-(c&1))); c = (c >> 1) ^ (poly & (-(c & 1)));
ctx[i] = c; ctx[i] = c;
} else { } else {
for (c = i << 24, j = 0; j < 8; j++) for (c = i << 24, j = 0; j < 8; j++)
c = (c<<1) ^ ((poly<<(32-bits)) & (((int32_t)c)>>31) ); c = (c << 1) ^ ((poly << (32 - bits)) & (((int32_t) c) >> 31));
ctx[i] = av_bswap32(c); ctx[i] = av_bswap32(c);
} }
} }
ctx[256]=1; ctx[256] = 1;
#if !CONFIG_SMALL #if !CONFIG_SMALL
if(ctx_size >= sizeof(AVCRC)*1024) if (ctx_size >= sizeof(AVCRC) * 1024)
for (i = 0; i < 256; i++) for (i = 0; i < 256; i++)
for(j=0; j<3; j++) for (j = 0; j < 3; j++)
ctx[256*(j+1) + i]= (ctx[256*j + i]>>8) ^ ctx[ ctx[256*j + i]&0xFF ]; ctx[256 *(j + 1) + i] =
(ctx[256 * j + i] >> 8) ^ ctx[ctx[256 * j + i] & 0xFF];
#endif #endif
return 0; return 0;
...@@ -92,9 +94,10 @@ int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){ ...@@ -92,9 +94,10 @@ int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){
* @param crc_id ID of a standard CRC * @param crc_id ID of a standard CRC
* @return a pointer to the CRC table or NULL on failure * @return a pointer to the CRC table or NULL on failure
*/ */
const AVCRC *av_crc_get_table(AVCRCId crc_id){ const AVCRC *av_crc_get_table(AVCRCId crc_id)
{
#if !CONFIG_HARDCODED_TABLES #if !CONFIG_HARDCODED_TABLES
if (!av_crc_table[crc_id][FF_ARRAY_ELEMS(av_crc_table[crc_id])-1]) if (!av_crc_table[crc_id][FF_ARRAY_ELEMS(av_crc_table[crc_id]) - 1])
if (av_crc_init(av_crc_table[crc_id], if (av_crc_init(av_crc_table[crc_id],
av_crc_table_params[crc_id].le, av_crc_table_params[crc_id].le,
av_crc_table_params[crc_id].bits, av_crc_table_params[crc_id].bits,
...@@ -112,46 +115,50 @@ const AVCRC *av_crc_get_table(AVCRCId crc_id){ ...@@ -112,46 +115,50 @@ const AVCRC *av_crc_get_table(AVCRCId crc_id){
* *
* @see av_crc_init() "le" parameter * @see av_crc_init() "le" parameter
*/ */
uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length){ uint32_t av_crc(const AVCRC *ctx, uint32_t crc,
const uint8_t *end= buffer+length; const uint8_t *buffer, size_t length)
{
const uint8_t *end = buffer + length;
#if !CONFIG_SMALL #if !CONFIG_SMALL
if(!ctx[256]) { if (!ctx[256]) {
while(((intptr_t) buffer & 3) && buffer < end) while (((intptr_t) buffer & 3) && buffer < end)
crc = ctx[((uint8_t)crc) ^ *buffer++] ^ (crc >> 8); crc = ctx[((uint8_t) crc) ^ *buffer++] ^ (crc >> 8);
while(buffer<end-3){ while (buffer < end - 3) {
crc ^= av_le2ne32(*(const uint32_t*)buffer); buffer+=4; crc ^= av_le2ne32(*(const uint32_t *) buffer); buffer += 4;
crc = ctx[3*256 + ( crc &0xFF)] crc = ctx[3 * 256 + ( crc & 0xFF)] ^
^ctx[2*256 + ((crc>>8 )&0xFF)] ctx[2 * 256 + ((crc >> 8 ) & 0xFF)] ^
^ctx[1*256 + ((crc>>16)&0xFF)] ctx[1 * 256 + ((crc >> 16) & 0xFF)] ^
^ctx[0*256 + ((crc>>24) )]; ctx[0 * 256 + ((crc >> 24) )];
} }
} }
#endif #endif
while(buffer<end) while (buffer < end)
crc = ctx[((uint8_t)crc) ^ *buffer++] ^ (crc >> 8); crc = ctx[((uint8_t) crc) ^ *buffer++] ^ (crc >> 8);
return crc; return crc;
} }
#ifdef TEST #ifdef TEST
#undef printf #undef printf
int main(void){ int main(void)
{
uint8_t buf[1999]; uint8_t buf[1999];
int i; int i;
int p[4][3]={{AV_CRC_32_IEEE_LE, 0xEDB88320, 0x3D5CDD04}, int p[4][3] = { { AV_CRC_32_IEEE_LE, 0xEDB88320, 0x3D5CDD04 },
{AV_CRC_32_IEEE , 0x04C11DB7, 0xC0F5BAE0}, { AV_CRC_32_IEEE , 0x04C11DB7, 0xC0F5BAE0 },
{AV_CRC_16_ANSI , 0x8005, 0x1FBB }, { AV_CRC_16_ANSI , 0x8005 , 0x1FBB },
{AV_CRC_8_ATM , 0x07, 0xE3 },}; { AV_CRC_8_ATM , 0x07 , 0xE3 }
};
const AVCRC *ctx; const AVCRC *ctx;
for(i=0; i<sizeof(buf); i++) for (i = 0; i < sizeof(buf); i++)
buf[i]= i+i*i; buf[i] = i + i * i;
for(i=0; i<4; i++){ for (i = 0; i < 4; i++) {
ctx = av_crc_get_table(p[i][0]); ctx = av_crc_get_table(p[i][0]);
printf("crc %08X =%X\n", p[i][1], av_crc(ctx, 0, buf, sizeof(buf))); printf("crc %08X = %X\n", p[i][1], av_crc(ctx, 0, buf, sizeof(buf)));
} }
return 0; return 0;
} }
......
libavutil/lfg.c
View file @ 425b45d4
...@@ -27,19 +27,21 @@ ...@@ -27,19 +27,21 @@
#include "intreadwrite.h" #include "intreadwrite.h"
#include "attributes.h" #include "attributes.h"
void av_cold av_lfg_init(AVLFG *c, unsigned int seed){ void av_cold av_lfg_init(AVLFG *c, unsigned int seed)
uint8_t tmp[16]={0}; {
uint8_t tmp[16] = { 0 };
int i; int i;
for(i=8; i<64; i+=4){ for (i = 8; i < 64; i += 4) {
AV_WL32(tmp, seed); tmp[4]=i; AV_WL32(tmp, seed);
av_md5_sum(tmp, tmp, 16); tmp[4] = i;
c->state[i ]= AV_RL32(tmp); av_md5_sum(tmp, tmp, 16);
c->state[i+1]= AV_RL32(tmp+4); c->state[i ] = AV_RL32(tmp);
c->state[i+2]= AV_RL32(tmp+8); c->state[i + 1] = AV_RL32(tmp + 4);
c->state[i+3]= AV_RL32(tmp+12); c->state[i + 2] = AV_RL32(tmp + 8);
c->state[i + 3] = AV_RL32(tmp + 12);
} }
c->index=0; c->index = 0;
} }
void av_bmg_get(AVLFG *lfg, double out[2]) void av_bmg_get(AVLFG *lfg, double out[2])
...@@ -47,9 +49,9 @@ void av_bmg_get(AVLFG *lfg, double out[2]) ...@@ -47,9 +49,9 @@ void av_bmg_get(AVLFG *lfg, double out[2])
double x1, x2, w; double x1, x2, w;
do { do {
x1 = 2.0/UINT_MAX*av_lfg_get(lfg) - 1.0; x1 = 2.0 / UINT_MAX * av_lfg_get(lfg) - 1.0;
x2 = 2.0/UINT_MAX*av_lfg_get(lfg) - 1.0; x2 = 2.0 / UINT_MAX * av_lfg_get(lfg) - 1.0;
w = x1*x1 + x2*x2; w = x1 * x1 + x2 * x2;
} while (w >= 1.0); } while (w >= 1.0);
w = sqrt((-2.0 * log(w)) / w); w = sqrt((-2.0 * log(w)) / w);
...@@ -63,7 +65,7 @@ void av_bmg_get(AVLFG *lfg, double out[2]) ...@@ -63,7 +65,7 @@ void av_bmg_get(AVLFG *lfg, double out[2])
int main(void) int main(void)
{ {
int x=0; int x = 0;
int i, j; int i, j;
AVLFG state; AVLFG state;
...@@ -71,8 +73,8 @@ int main(void) ...@@ -71,8 +73,8 @@ int main(void)
for (j = 0; j < 10000; j++) { for (j = 0; j < 10000; j++) {
START_TIMER START_TIMER
for (i = 0; i < 624; i++) { for (i = 0; i < 624; i++) {
// av_log(NULL,AV_LOG_ERROR, "%X\n", av_lfg_get(&state)); //av_log(NULL, AV_LOG_ERROR, "%X\n", av_lfg_get(&state));
x+=av_lfg_get(&state); x += av_lfg_get(&state);
} }
STOP_TIMER("624 calls of av_lfg_get"); STOP_TIMER("624 calls of av_lfg_get");
} }
......
libavutil/log.c
View file @ 425b45d4
...@@ -35,104 +35,116 @@ static int flags; ...@@ -35,104 +35,116 @@ static int flags;
#if defined(_WIN32) && !defined(__MINGW32CE__) #if defined(_WIN32) && !defined(__MINGW32CE__)
#include <windows.h> #include <windows.h>
static const uint8_t color[] = {12,12,12,14,7,7,7}; static const uint8_t color[] = { 12, 12, 12, 14, 7, 7, 7 };
static int16_t background, attr_orig; static int16_t background, attr_orig;
static HANDLE con; static HANDLE con;
#define set_color(x) SetConsoleTextAttribute(con, background | color[x]) #define set_color(x) SetConsoleTextAttribute(con, background | color[x])
#define reset_color() SetConsoleTextAttribute(con, attr_orig) #define reset_color() SetConsoleTextAttribute(con, attr_orig)
#else #else
static const uint8_t color[]={0x41,0x41,0x11,0x03,9,9,9}; static const uint8_t color[] = { 0x41, 0x41, 0x11, 0x03, 9, 9, 9 };
#define set_color(x) fprintf(stderr, "\033[%d;3%dm", color[x]>>4, color[x]&15) #define set_color(x) fprintf(stderr, "\033[%d;3%dm", color[x] >> 4, color[x]&15)
#define reset_color() fprintf(stderr, "\033[0m") #define reset_color() fprintf(stderr, "\033[0m")
#endif #endif
static int use_color=-1; static int use_color = -1;
#undef fprintf #undef fprintf
static void colored_fputs(int level, const char *str){ static void colored_fputs(int level, const char *str)
if(use_color<0){ {
if (use_color < 0) {
#if defined(_WIN32) && !defined(__MINGW32CE__) #if defined(_WIN32) && !defined(__MINGW32CE__)
CONSOLE_SCREEN_BUFFER_INFO con_info; CONSOLE_SCREEN_BUFFER_INFO con_info;
con = GetStdHandle(STD_ERROR_HANDLE); con = GetStdHandle(STD_ERROR_HANDLE);
use_color = (con != INVALID_HANDLE_VALUE) && !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR"); use_color = (con != INVALID_HANDLE_VALUE) && !getenv("NO_COLOR") &&
!getenv("AV_LOG_FORCE_NOCOLOR");
if (use_color) { if (use_color) {
GetConsoleScreenBufferInfo(con, &con_info); GetConsoleScreenBufferInfo(con, &con_info);
attr_orig = con_info.wAttributes; attr_orig = con_info.wAttributes;
background = attr_orig & 0xF0; background = attr_orig & 0xF0;
} }
#elif HAVE_ISATTY #elif HAVE_ISATTY
use_color= !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR") && use_color = !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR") &&
(getenv("TERM") && isatty(2) || getenv("AV_LOG_FORCE_COLOR")); (getenv("TERM") && isatty(2) ||
getenv("AV_LOG_FORCE_COLOR"));
#else #else
use_color= getenv("AV_LOG_FORCE_COLOR") && !getenv("NO_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR"); use_color = getenv("AV_LOG_FORCE_COLOR") && !getenv("NO_COLOR") &&
!getenv("AV_LOG_FORCE_NOCOLOR");
#endif #endif
} }
if(use_color){ if (use_color) {
set_color(level); set_color(level);
} }
fputs(str, stderr); fputs(str, stderr);
if(use_color){ if (use_color) {
reset_color(); reset_color();
} }
} }
const char* av_default_item_name(void* ptr){ const char *av_default_item_name(void *ptr)
return (*(AVClass**)ptr)->class_name; {
return (*(AVClass **) ptr)->class_name;
} }
void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl) void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
{ {
static int print_prefix=1; static int print_prefix = 1;
static int count; static int count;
static char prev[1024]; static char prev[1024];
char line[1024]; char line[1024];
static int is_atty; static int is_atty;
AVClass* avc= ptr ? *(AVClass**)ptr : NULL; AVClass* avc = ptr ? *(AVClass **) ptr : NULL;
if(level>av_log_level) if (level > av_log_level)
return; return;
line[0]=0; line[0] = 0;
#undef fprintf #undef fprintf
if(print_prefix && avc) { if (print_prefix && avc) {
if (avc->parent_log_context_offset) { if (avc->parent_log_context_offset) {
AVClass** parent= *(AVClass***)(((uint8_t*)ptr) + avc->parent_log_context_offset); AVClass** parent = *(AVClass ***) (((uint8_t *) ptr) +
if(parent && *parent){ avc->parent_log_context_offset);
snprintf(line, sizeof(line), "[%s @ %p] ", (*parent)->item_name(parent), parent); if (parent && *parent) {
snprintf(line, sizeof(line), "[%s @ %p] ",
(*parent)->item_name(parent), parent);
} }
} }
snprintf(line + strlen(line), sizeof(line) - strlen(line), "[%s @ %p] ", avc->item_name(ptr), ptr); snprintf(line + strlen(line), sizeof(line) - strlen(line), "[%s @ %p] ",
avc->item_name(ptr), ptr);
} }
vsnprintf(line + strlen(line), sizeof(line) - strlen(line), fmt, vl); vsnprintf(line + strlen(line), sizeof(line) - strlen(line), fmt, vl);
print_prefix = strlen(line) && line[strlen(line)-1] == '\n'; print_prefix = strlen(line) && line[strlen(line) - 1] == '\n';
#if HAVE_ISATTY #if HAVE_ISATTY
if(!is_atty) is_atty= isatty(2) ? 1 : -1; if (!is_atty)
is_atty = isatty(2) ? 1 : -1;
#endif #endif
if(print_prefix && (flags & AV_LOG_SKIP_REPEATED) && !strncmp(line, prev, sizeof line)){ if (print_prefix && (flags & AV_LOG_SKIP_REPEATED) &&
!strncmp(line, prev, sizeof line)) {
count++; count++;
if(is_atty==1) if (is_atty == 1)
fprintf(stderr, " Last message repeated %d times\r", count); fprintf(stderr, " Last message repeated %d times\r", count);
return; return;
} }
if(count>0){ if (count > 0) {
fprintf(stderr, " Last message repeated %d times\n", count); fprintf(stderr, " Last message repeated %d times\n", count);
count=0; count = 0;
} }
colored_fputs(av_clip(level>>3, 0, 6), line); colored_fputs(av_clip(level >> 3, 0, 6), line);
av_strlcpy(prev, line, sizeof line); av_strlcpy(prev, line, sizeof line);
} }
static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback; static void (*av_log_callback)(void*, int, const char*, va_list) =
av_log_default_callback;
void av_log(void* avcl, int level, const char *fmt, ...) void av_log(void* avcl, int level, const char *fmt, ...)
{ {
AVClass* avc= avcl ? *(AVClass**)avcl : NULL; AVClass* avc = avcl ? *(AVClass **) avcl : NULL;
va_list vl; va_list vl;
va_start(vl, fmt); va_start(vl, fmt);
if(avc && avc->version >= (50<<16 | 15<<8 | 2) && avc->log_level_offset_offset && level>=AV_LOG_FATAL) if (avc && avc->version >= (50 << 16 | 15 << 8 | 2) &&
level += *(int*)(((uint8_t*)avcl) + avc->log_level_offset_offset); avc->log_level_offset_offset && level >= AV_LOG_FATAL)
level += *(int *) (((uint8_t *) avcl) + avc->log_level_offset_offset);
av_vlog(avcl, level, fmt, vl); av_vlog(avcl, level, fmt, vl);
va_end(vl); va_end(vl);
} }
...@@ -154,7 +166,7 @@ void av_log_set_level(int level) ...@@ -154,7 +166,7 @@ void av_log_set_level(int level)
void av_log_set_flags(int arg) void av_log_set_flags(int arg)
{ {
flags= arg; flags = arg;
} }
void av_log_set_callback(void (*callback)(void*, int, const char*, va_list)) void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
......
libavutil/random_seed.c
View file @ 425b45d4
...@@ -40,24 +40,24 @@ static int read_random(uint32_t *dst, const char *file) ...@@ -40,24 +40,24 @@ static int read_random(uint32_t *dst, const char *file)
static uint32_t get_generic_seed(void) static uint32_t get_generic_seed(void)
{ {
clock_t last_t=0; clock_t last_t = 0;
int bits=0; int bits = 0;
uint64_t random=0; uint64_t random = 0;
unsigned i; unsigned i;
float s=0.000000000001; float s = 0.000000000001;
for(i=0;bits<64;i++){ for (i = 0; bits < 64; i++) {
clock_t t= clock(); clock_t t = clock();
if(last_t && fabs(t-last_t)>s || t==(clock_t)-1){ if (last_t && fabs(t - last_t) > s || t == (clock_t) -1) {
if(i<10000 && s<(1<<24)){ if (i < 10000 && s < (1 << 24)) {
s+=s; s += s;
i=t=0; i = t = 0;
}else{ } else {
random= 2*random + (i&1); random = 2 * random + (i & 1);
bits++; bits++;
} }
} }
last_t= t; last_t = t;
} }
#ifdef AV_READ_TIME #ifdef AV_READ_TIME
random ^= AV_READ_TIME(); random ^= AV_READ_TIME();
...@@ -65,7 +65,7 @@ static uint32_t get_generic_seed(void) ...@@ -65,7 +65,7 @@ static uint32_t get_generic_seed(void)
random ^= clock(); random ^= clock();
#endif #endif
random += random>>32; random += random >> 32;
return random; return random;
} }
......
libavutil/rational.c
View file @ 425b45d4
...@@ -33,75 +33,86 @@ ...@@ -33,75 +33,86 @@
#include "mathematics.h" #include "mathematics.h"
#include "rational.h" #include "rational.h"
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max){ int av_reduce(int *dst_num, int *dst_den,
AVRational a0={0,1}, a1={1,0}; int64_t num, int64_t den, int64_t max)
int sign= (num<0) ^ (den<0); {
int64_t gcd= av_gcd(FFABS(num), FFABS(den)); AVRational a0 = { 0, 1 }, a1 = { 1, 0 };
int sign = (num < 0) ^ (den < 0);
if(gcd){ int64_t gcd = av_gcd(FFABS(num), FFABS(den));
num = FFABS(num)/gcd;
den = FFABS(den)/gcd; if (gcd) {
num = FFABS(num) / gcd;
den = FFABS(den) / gcd;
} }
if(num<=max && den<=max){ if (num <= max && den <= max) {
a1= (AVRational){num, den}; a1 = (AVRational) { num, den };
den=0; den = 0;
} }
while(den){ while (den) {
uint64_t x = num / den; uint64_t x = num / den;
int64_t next_den= num - den*x; int64_t next_den = num - den * x;
int64_t a2n= x*a1.num + a0.num; int64_t a2n = x * a1.num + a0.num;
int64_t a2d= x*a1.den + a0.den; int64_t a2d = x * a1.den + a0.den;
if(a2n > max || a2d > max){ if (a2n > max || a2d > max) {
if(a1.num) x= (max - a0.num) / a1.num; if (a1.num) x = (max - a0.num) / a1.num;
if(a1.den) x= FFMIN(x, (max - a0.den) / a1.den); if (a1.den) x = FFMIN(x, (max - a0.den) / a1.den);
if (den*(2*x*a1.den + a0.den) > num*a1.den) if (den * (2 * x * a1.den + a0.den) > num * a1.den)
a1 = (AVRational){x*a1.num + a0.num, x*a1.den + a0.den}; a1 = (AVRational) { x * a1.num + a0.num, x * a1.den + a0.den };
break; break;
} }
a0= a1; a0 = a1;
a1= (AVRational){a2n, a2d}; a1 = (AVRational) { a2n, a2d };
num= den; num = den;
den= next_den; den = next_den;
} }
av_assert2(av_gcd(a1.num, a1.den) <= 1U); av_assert2(av_gcd(a1.num, a1.den) <= 1U);
*dst_num = sign ? -a1.num : a1.num; *dst_num = sign ? -a1.num : a1.num;
*dst_den = a1.den; *dst_den = a1.den;
return den==0; return den == 0;
} }
AVRational av_mul_q(AVRational b, AVRational c){ AVRational av_mul_q(AVRational b, AVRational c)
av_reduce(&b.num, &b.den, b.num * (int64_t)c.num, b.den * (int64_t)c.den, INT_MAX); {
av_reduce(&b.num, &b.den,
b.num * (int64_t) c.num,
b.den * (int64_t) c.den, INT_MAX);
return b; return b;
} }
AVRational av_div_q(AVRational b, AVRational c){ AVRational av_div_q(AVRational b, AVRational c)
return av_mul_q(b, (AVRational){c.den, c.num}); {
return av_mul_q(b, (AVRational) { c.den, c.num });
} }
AVRational av_add_q(AVRational b, AVRational c){ AVRational av_add_q(AVRational b, AVRational c) {
av_reduce(&b.num, &b.den, b.num * (int64_t)c.den + c.num * (int64_t)b.den, b.den * (int64_t)c.den, INT_MAX); av_reduce(&b.num, &b.den,
b.num * (int64_t) c.den +
c.num * (int64_t) b.den,
b.den * (int64_t) c.den, INT_MAX);
return b; return b;
} }
AVRational av_sub_q(AVRational b, AVRational c){ AVRational av_sub_q(AVRational b, AVRational c)
return av_add_q(b, (AVRational){-c.num, c.den}); {
return av_add_q(b, (AVRational) { -c.num, c.den });
} }
AVRational av_d2q(double d, int max){ AVRational av_d2q(double d, int max)
{
AVRational a; AVRational a;
#define LOG2 0.69314718055994530941723212145817656807550013436025 #define LOG2 0.69314718055994530941723212145817656807550013436025
int exponent; int exponent;
int64_t den; int64_t den;
if (isnan(d)) if (isnan(d))
return (AVRational){0,0}; return (AVRational) { 0,0 };
if (isinf(d)) if (isinf(d))
return (AVRational){ d<0 ? -1:1, 0 }; return (AVRational) { d < 0 ? -1 : 1, 0 };
exponent = FFMAX( (int)(log(fabs(d) + 1e-20)/LOG2), 0); exponent = FFMAX( (int)(log(fabs(d) + 1e-20)/LOG2), 0);
den = 1LL << (61 - exponent); den = 1LL << (61 - exponent);
av_reduce(&a.num, &a.den, (int64_t)(d * den + 0.5), den, max); av_reduce(&a.num, &a.den, (int64_t)(d * den + 0.5), den, max);
...@@ -127,7 +138,7 @@ int av_nearer_q(AVRational q, AVRational q1, AVRational q2) ...@@ -127,7 +138,7 @@ int av_nearer_q(AVRational q, AVRational q1, AVRational q2)
int av_find_nearest_q_idx(AVRational q, const AVRational* q_list) int av_find_nearest_q_idx(AVRational q, const AVRational* q_list)
{ {
int i, nearest_q_idx = 0; int i, nearest_q_idx = 0;
for(i=0; q_list[i].den; i++) for (i = 0; q_list[i].den; i++)
if (av_nearer_q(q, q_list[i], q_list[nearest_q_idx]) > 0) if (av_nearer_q(q, q_list[i], q_list[nearest_q_idx]) > 0)
nearest_q_idx = i; nearest_q_idx = i;
...@@ -138,16 +149,19 @@ int av_find_nearest_q_idx(AVRational q, const AVRational* q_list) ...@@ -138,16 +149,19 @@ int av_find_nearest_q_idx(AVRational q, const AVRational* q_list)
int main(void) int main(void)
{ {
AVRational a,b; AVRational a,b;
for(a.num=-2; a.num<=2; a.num++){ for (a.num = -2; a.num <= 2; a.num++) {
for(a.den=-2; a.den<=2; a.den++){ for (a.den = -2; a.den <= 2; a.den++) {
for(b.num=-2; b.num<=2; b.num++){ for (b.num = -2; b.num <= 2; b.num++) {
for(b.den=-2; b.den<=2; b.den++){ for (b.den = -2; b.den <= 2; b.den++) {
int c= av_cmp_q(a,b); int c = av_cmp_q(a,b);
double d= av_q2d(a) == av_q2d(b) ? 0 : (av_q2d(a) - av_q2d(b)); double d = av_q2d(a) == av_q2d(b) ?
if(d>0) d=1; 0 : (av_q2d(a) - av_q2d(b));
else if(d<0) d=-1; if (d > 0) d = 1;
else if(d != d) d= INT_MIN; else if (d < 0) d = -1;
if(c!=d) av_log(0, AV_LOG_ERROR, "%d/%d %d/%d, %d %f\n", a.num, a.den, b.num, b.den, c,d); else if (d != d) d = INT_MIN;
if (c != d)
av_log(0, AV_LOG_ERROR, "%d/%d %d/%d, %d %f\n", a.num,
a.den, b.num, b.den, c,d);
} }
} }
} }
......
libavutil/tree.c
View file @ 425b45d4
...@@ -21,22 +21,24 @@ ...@@ -21,22 +21,24 @@
#include "log.h" #include "log.h"
#include "tree.h" #include "tree.h"
typedef struct AVTreeNode{ typedef struct AVTreeNode {
struct AVTreeNode *child[2]; struct AVTreeNode *child[2];
void *elem; void *elem;
int state; int state;
}AVTreeNode; } AVTreeNode;
const int av_tree_node_size = sizeof(AVTreeNode); const int av_tree_node_size = sizeof(AVTreeNode);
void *av_tree_find(const AVTreeNode *t, void *key, int (*cmp)(void *key, const void *b), void *next[2]){ void *av_tree_find(const AVTreeNode *t, void *key,
if(t){ int (*cmp)(void *key, const void *b), void *next[2])
unsigned int v= cmp(key, t->elem); {
if(v){ if (t) {
if(next) next[v>>31]= t->elem; unsigned int v = cmp(key, t->elem);
return av_tree_find(t->child[(v>>31)^1], key, cmp, next); if (v) {
}else{ if (next) next[v >> 31] = t->elem;
if(next){ return av_tree_find(t->child[(v >> 31) ^ 1], key, cmp, next);
} else {
if (next) {
av_tree_find(t->child[0], key, cmp, next); av_tree_find(t->child[0], key, cmp, next);
av_tree_find(t->child[1], key, cmp, next); av_tree_find(t->child[1], key, cmp, next);
} }
...@@ -46,41 +48,43 @@ void *av_tree_find(const AVTreeNode *t, void *key, int (*cmp)(void *key, const v ...@@ -46,41 +48,43 @@ void *av_tree_find(const AVTreeNode *t, void *key, int (*cmp)(void *key, const v
return NULL; return NULL;
} }
void *av_tree_insert(AVTreeNode **tp, void *key, int (*cmp)(void *key, const void *b), AVTreeNode **next){ void *av_tree_insert(AVTreeNode **tp, void *key,
AVTreeNode *t= *tp; int (*cmp)(void *key, const void *b), AVTreeNode **next)
if(t){ {
unsigned int v= cmp(t->elem, key); AVTreeNode *t = *tp;
if (t) {
unsigned int v = cmp(t->elem, key);
void *ret; void *ret;
if(!v){ if (!v) {
if(*next) if (*next)
return t->elem; return t->elem;
else if(t->child[0]||t->child[1]){ else if (t->child[0] || t->child[1]) {
int i= !t->child[0]; int i = !t->child[0];
void *next_elem[2]; void *next_elem[2];
av_tree_find(t->child[i], key, cmp, next_elem); av_tree_find(t->child[i], key, cmp, next_elem);
key= t->elem= next_elem[i]; key = t->elem = next_elem[i];
v= -i; v = -i;
}else{ } else {
*next= t; *next = t;
*tp=NULL; *tp = NULL;
return NULL; return NULL;
} }
} }
ret= av_tree_insert(&t->child[v>>31], key, cmp, next); ret = av_tree_insert(&t->child[v >> 31], key, cmp, next);
if(!ret){ if (!ret) {
int i= (v>>31) ^ !!*next; int i = (v >> 31) ^ !!*next;
AVTreeNode **child= &t->child[i]; AVTreeNode **child = &t->child[i];
t->state += 2*i - 1; t->state += 2 * i - 1;
if(!(t->state&1)){ if (!(t->state & 1)) {
if(t->state){ if (t->state) {
/* The following code is equivalent to /* The following code is equivalent to
if((*child)->state*2 == -t->state) if((*child)->state*2 == -t->state)
rotate(child, i^1); rotate(child, i^1);
rotate(tp, i); rotate(tp, i);
with rotate(): with rotate():
static void rotate(AVTreeNode **tp, int i){ static void rotate(AVTreeNode **tp, int i) {
AVTreeNode *t= *tp; AVTreeNode *t= *tp;
*tp= t->child[i]; *tp= t->child[i];
...@@ -92,54 +96,62 @@ void *av_tree_insert(AVTreeNode **tp, void *key, int (*cmp)(void *key, const voi ...@@ -92,54 +96,62 @@ void *av_tree_insert(AVTreeNode **tp, void *key, int (*cmp)(void *key, const voi
} }
but such a rotate function is both bigger and slower but such a rotate function is both bigger and slower
*/ */
if((*child)->state*2 == -t->state){ if (( *child )->state * 2 == -t->state) {
*tp= (*child)->child[i^1]; *tp = (*child)->child[i ^ 1];
(*child)->child[i^1]= (*tp)->child[i]; (*child)->child[i ^ 1] = (*tp)->child[i];
(*tp)->child[i]= *child; (*tp)->child[i] = *child;
*child= (*tp)->child[i^1]; *child = ( *tp )->child[i ^ 1];
(*tp)->child[i^1]= t; (*tp)->child[i ^ 1] = t;
(*tp)->child[0]->state= -((*tp)->state>0); (*tp)->child[0]->state = -((*tp)->state > 0);
(*tp)->child[1]->state= (*tp)->state<0 ; (*tp)->child[1]->state = (*tp)->state < 0;
(*tp)->state=0; (*tp)->state = 0;
}else{ } else {
*tp= *child; *tp = *child;
*child= (*child)->child[i^1]; *child = (*child)->child[i ^ 1];
(*tp)->child[i^1]= t; (*tp)->child[i ^ 1] = t;
if((*tp)->state) t->state = 0; if ((*tp)->state) t->state = 0;
else t->state>>= 1; else t->state >>= 1;
(*tp)->state= -t->state; (*tp)->state = -t->state;
} }
} }
} }
if(!(*tp)->state ^ !!*next) if (!(*tp)->state ^ !!*next)
return key; return key;
} }
return ret; return ret;
}else{ } else {
*tp= *next; *next= NULL; *tp = *next;
if(*tp){ *next = NULL;
(*tp)->elem= key; if (*tp) {
(*tp)->elem = key;
return NULL; return NULL;
}else } else
return key; return key;
} }
} }
void av_tree_destroy(AVTreeNode *t){ void av_tree_destroy(AVTreeNode *t)
if(t){ {
if (t) {
av_tree_destroy(t->child[0]); av_tree_destroy(t->child[0]);
av_tree_destroy(t->child[1]); av_tree_destroy(t->child[1]);
av_free(t); av_free(t);
} }
} }
void av_tree_enumerate(AVTreeNode *t, void *opaque, int (*cmp)(void *opaque, void *elem), int (*enu)(void *opaque, void *elem)){ void av_tree_enumerate(AVTreeNode *t, void *opaque,
if(t){ int (*cmp)(void *opaque, void *elem),
int v= cmp ? cmp(opaque, t->elem) : 0; int (*enu)(void *opaque, void *elem))
if(v>=0) av_tree_enumerate(t->child[0], opaque, cmp, enu); {
if(v==0) enu(opaque, t->elem); if (t) {
if(v<=0) av_tree_enumerate(t->child[1], opaque, cmp, enu); int v = cmp ? cmp(opaque, t->elem) : 0;
if (v >= 0)
av_tree_enumerate(t->child[0], opaque, cmp, enu);
if (v == 0)
enu(opaque, t->elem);
if (v <= 0)
av_tree_enumerate(t->child[1], opaque, cmp, enu);
} }
} }
...@@ -147,64 +159,68 @@ void av_tree_enumerate(AVTreeNode *t, void *opaque, int (*cmp)(void *opaque, voi ...@@ -147,64 +159,68 @@ void av_tree_enumerate(AVTreeNode *t, void *opaque, int (*cmp)(void *opaque, voi
#include "lfg.h" #include "lfg.h"
static int check(AVTreeNode *t){ static int check(AVTreeNode *t)
if(t){ {
int left= check(t->child[0]); if (t) {
int right= check(t->child[1]); int left = check(t->child[0]);
int right = check(t->child[1]);
if(left>999 || right>999) if (left>999 || right>999)
return 1000; return 1000;
if(right - left != t->state) if (right - left != t->state)
return 1000; return 1000;
if(t->state>1 || t->state<-1) if (t->state>1 || t->state<-1)
return 1000; return 1000;
return FFMAX(left, right)+1; return FFMAX(left, right) + 1;
} }
return 0; return 0;
} }
static void print(AVTreeNode *t, int depth){ static void print(AVTreeNode *t, int depth)
{
int i; int i;
for(i=0; i<depth*4; i++) av_log(NULL, AV_LOG_ERROR, " "); for (i = 0; i < depth * 4; i++) av_log(NULL, AV_LOG_ERROR, " ");
if(t){ if (t) {
av_log(NULL, AV_LOG_ERROR, "Node %p %2d %p\n", t, t->state, t->elem); av_log(NULL, AV_LOG_ERROR, "Node %p %2d %p\n", t, t->state, t->elem);
print(t->child[0], depth+1); print(t->child[0], depth + 1);
print(t->child[1], depth+1); print(t->child[1], depth + 1);
}else } else
av_log(NULL, AV_LOG_ERROR, "NULL\n"); av_log(NULL, AV_LOG_ERROR, "NULL\n");
} }
static int cmp(void *a, const void *b){ static int cmp(void *a, const void *b)
return (uint8_t*)a-(const uint8_t*)b; {
return (uint8_t *) a - (const uint8_t *) b;
} }
int main(void){ int main (void)
{
int i; int i;
void *k; void *k;
AVTreeNode *root= NULL, *node=NULL; AVTreeNode *root = NULL, *node = NULL;
AVLFG prng; AVLFG prng;
av_lfg_init(&prng, 1); av_lfg_init(&prng, 1);
for(i=0; i<10000; i++){ for (i = 0; i < 10000; i++) {
int j = av_lfg_get(&prng) % 86294; int j = av_lfg_get(&prng) % 86294;
if(check(root) > 999){ if (check(root) > 999) {
av_log(NULL, AV_LOG_ERROR, "FATAL error %d\n", i); av_log(NULL, AV_LOG_ERROR, "FATAL error %d\n", i);
print(root, 0); print(root, 0);
return -1; return -1;
} }
av_log(NULL, AV_LOG_ERROR, "inserting %4d\n", j); av_log(NULL, AV_LOG_ERROR, "inserting %4d\n", j);
if(!node) if (!node)
node= av_mallocz(av_tree_node_size); node = av_mallocz(av_tree_node_size);
av_tree_insert(&root, (void*)(j+1), cmp, &node); av_tree_insert(&root, (void *) (j + 1), cmp, &node);
j = av_lfg_get(&prng) % 86294; j = av_lfg_get(&prng) % 86294;
{ {
AVTreeNode *node2=NULL; AVTreeNode *node2 = NULL;
av_log(NULL, AV_LOG_ERROR, "removing %4d\n", j); av_log(NULL, AV_LOG_ERROR, "removing %4d\n", j);
av_tree_insert(&root, (void*)(j+1), cmp, &node2); av_tree_insert(&root, (void *) (j + 1), cmp, &node2);
k= av_tree_find(root, (void*)(j+1), cmp, NULL); k = av_tree_find(root, (void *) (j + 1), cmp, NULL);
if(k) if (k)
av_log(NULL, AV_LOG_ERROR, "removal failure %d\n", i); av_log(NULL, AV_LOG_ERROR, "removal failure %d\n", i);
} }
} }
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment