static uint32_t get_generic_seed(void)
{
clock_t last_t=0;
int bits=0;
uint64_t random=0;
unsigned i;
float s=0.000000000001;
for(i=0;bits<64;i++){
#ifdef AV_READ_TIME
clock_t t = AV_READ_TIME();
#else
clock_t t = clock();
#endif
if(last_t && fabs(t-last_t)>s || t==(clock_t)-1){
if(i<10000 && s<(1<<24)){
s+=s;
i=t=0;
}else{
random= 2*random + (i&1);
bits++;
}
}
last_t= t;
}
#ifdef AV_READ_TIME
random ^= AV_READ_TIME();
#else
random ^= clock();
#endif
random += random>>32;
return random;
}
static void probe(AVProbeData *pd, int type, int p, int size)
{
int i = 0;
AVInputFormat *fmt = NULL;
while ((fmt = av_iformat_next(fmt))) {
if (fmt->flags & AVFMT_NOFILE)
continue;
if (fmt->read_probe &&
(!single_format || !strcmp(single_format, fmt->name))
) {
int score;
int64_t start = AV_READ_TIME();
score = fmt->read_probe(pd);
time_array[i] += AV_READ_TIME() - start;
if (score > score_array[i] && score > AVPROBE_SCORE_MAX / 4) {
score_array[i] = score;
fprintf(stderr,
"Failure of %s probing code with score=%d type=%d p=%X size=%d\n",
fmt->name, score, type, p, size);
failures++;
}
}
i++;
}
}
static void run_implementation(const uint8_t *input, uint8_t *output,
struct hash_impl *impl, unsigned size)
{
uint64_t t0, t1;
unsigned nruns = specified_runs ? specified_runs : (1 << 30) / size;
unsigned outlen = 0, outcrc = 0;
unsigned i, j, val;
double mtime, ttime = 0, ttime2 = 0, stime;
uint8_t outref[MAX_OUTPUT_SIZE];
if (enabled_libs && !av_stristr(enabled_libs, impl->lib) ||
enabled_algos && !av_stristr(enabled_algos, impl->name))
return;
if (!sscanf(impl->output, "crc:%x", &outcrc)) {
outlen = strlen(impl->output) / 2;
for (i = 0; i < outlen; i++) {
sscanf(impl->output + i * 2, "%02x", &val);
outref[i] = val;
}
}
for (i = 0; i < 8; i++) /* heat caches */
impl->run(output, input, size);
for (i = 0; i < nruns; i++) {
memset(output, 0, size); /* avoid leftovers from previous runs */
t0 = AV_READ_TIME();
impl->run(output, input, size);
t1 = AV_READ_TIME();
if (outlen ? memcmp(output, outref, outlen) :
crc32(output, size) != outcrc) {
fprintf(stderr, "Expected: ");
if (outlen)
for (j = 0; j < outlen; j++)
fprintf(stderr, "%02x", output[j]);
else
fprintf(stderr, "%08x", crc32(output, size));
fprintf(stderr, "\n");
fatal_error("output mismatch");
}
mtime = (double)(t1 - t0) / size;
ttime += mtime;
ttime2 += mtime * mtime;
}
ttime /= nruns;
ttime2 /= nruns;
stime = sqrt(ttime2 - ttime * ttime);
printf("%-10s %-12s size: %7d runs: %6d time: %8.3f +- %.3f\n",
impl->lib, impl->name, size, nruns, ttime, stime);
fflush(stdout);
}
static uint32_t get_generic_seed(void)
{
uint8_t tmp[120];
struct AVSHA *sha = (void*)tmp;
clock_t last_t = 0;
static uint64_t i = 0;
static uint32_t buffer[512] = { 0 };
unsigned char digest[20];
uint64_t last_i = i;
av_assert0(sizeof(tmp) >= av_sha_size);
if(TEST){
memset(buffer, 0, sizeof(buffer));
last_i = i = 0;
}else{
#ifdef AV_READ_TIME
buffer[13] ^= AV_READ_TIME();
buffer[41] ^= AV_READ_TIME()>>32;
#endif
}
for (;;) {
clock_t t = clock();
if (last_t == t) {
buffer[i & 511]++;
} else {
buffer[++i & 511] += (t - last_t) % 3294638521U;
if (last_i && i - last_i > 4 || i - last_i > 64 || TEST && i - last_i > 8)
break;
}
last_t = t;
}
if(TEST) {
buffer[0] = buffer[1] = 0;
} else {
#ifdef AV_READ_TIME
buffer[111] += AV_READ_TIME();
#endif
}
av_sha_init(sha, 160);
av_sha_update(sha, (const uint8_t *)buffer, sizeof(buffer));
av_sha_final(sha, digest);
return AV_RB32(digest) + AV_RB32(digest + 16);
}
int main(int argc, char **argv)
{
unsigned int p, i, type, size, retry;
AVProbeData pd = { 0 };
AVLFG state;
PutBitContext pb;
int retry_count= 4097;
int max_size = 65537;
int j;
for (j = i = 1; i<argc; i++) {
if (!strcmp(argv[i], "-f") && i+1<argc && !single_format) {
single_format = argv[++i];
} else if (read_int(argv[i])>0 && j == 1) {
retry_count = read_int(argv[i]);
j++;
} else if (read_int(argv[i])>0 && j == 2) {
max_size = read_int(argv[i]);
j++;
} else {
fprintf(stderr, "probetest [-f <input format>] [<retry_count> [<max_size>]]\n");
return 1;
}
}
if (max_size > 1000000000U/8) {
fprintf(stderr, "max_size out of bounds\n");
return 1;
}
if (retry_count > 1000000000U) {
fprintf(stderr, "retry_count out of bounds\n");
return 1;
}
av_lfg_init(&state, 0xdeadbeef);
pd.buf = NULL;
for (size = 1; size < max_size; size *= 2) {
pd.buf_size = size;
pd.buf = av_realloc(pd.buf, size + AVPROBE_PADDING_SIZE);
pd.filename = "";
if (!pd.buf) {
fprintf(stderr, "out of memory\n");
return 1;
}
memset(pd.buf, 0, size + AVPROBE_PADDING_SIZE);
fprintf(stderr, "testing size=%d\n", size);
for (retry = 0; retry < retry_count; retry += FFMAX(size, 32)) {
for (type = 0; type < 4; type++) {
for (p = 0; p < 4096; p++) {
unsigned hist = 0;
init_put_bits(&pb, pd.buf, size);
switch (type) {
case 0:
for (i = 0; i < size * 8; i++)
put_bits(&pb, 1, (av_lfg_get(&state) & 0xFFFFFFFF) > p << 20);
break;
case 1:
for (i = 0; i < size * 8; i++) {
unsigned int p2 = hist ? p & 0x3F : (p >> 6);
unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 26;
put_bits(&pb, 1, v);
hist = v;
}
break;
case 2:
for (i = 0; i < size * 8; i++) {
unsigned int p2 = (p >> (hist * 3)) & 7;
unsigned int v = (av_lfg_get(&state) & 0xFFFFFFFF) > p2 << 29;
put_bits(&pb, 1, v);
hist = (2 * hist + v) & 3;
}
break;
case 3:
for (i = 0; i < size; i++) {
int c = 0;
while (p & 63) {
c = (av_lfg_get(&state) & 0xFFFFFFFF) >> 24;
if (c >= 'a' && c <= 'z' && (p & 1))
break;
else if (c >= 'A' && c <= 'Z' && (p & 2))
break;
else if (c >= '0' && c <= '9' && (p & 4))
break;
else if (c == ' ' && (p & 8))
break;
else if (c == 0 && (p & 16))
break;
else if (c == 1 && (p & 32))
break;
}
pd.buf[i] = c;
}
}
flush_put_bits(&pb);
probe(&pd, type, p, size);
}
}
}
}
if(AV_READ_TIME())
print_times();
return failures;
}
