29 #include "libavutil/intfloat.h"
30 #include "libavutil/intreadwrite.h"
32 #define FFMIN(a, b) ((a) > (b) ? (b) : (a))
62 static unsigned int exp16(
unsigned int a){
76 static int64_t
log16(uint64_t a)
82 return -
log16((1LL << 32) / a);
85 for (i = 20; i >= 0; i--) {
90 a = ((a /
b) << 16) + (((a %
b) << 16) + b / 2) / b;
101 for (s = 31; s >= 0; s--) {
102 uint64_t
b = ret_sq + (1ULL << (s * 2)) + (ret <<
s) * 2;
117 v.u = p[0] | p[1] << 8;
124 v.
i = p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
139 int64_t max = (1LL << (8 *
len)) - 1;
142 uint64_t maxdist = 0;
143 double maxdist_d = 0.0;
146 noseek = fseek(f[0], 0, SEEK_SET) ||
147 fseek(f[1], 0, SEEK_SET);
150 for (i = 0; i < 2; i++) {
152 if (fread(p, 1, 12, f[i]) != 12)
154 if (!memcmp(p,
"RIFF", 4) &&
155 !memcmp(p + 8,
"WAVE", 4)) {
156 if (fread(p, 1, 8, f[i]) != 8)
158 while (memcmp(p,
"data", 4)) {
159 int s = p[4] | p[5] << 8 | p[6] << 16 | p[7] << 24;
160 fseek(f[i], s, SEEK_CUR);
161 if (fread(p, 1, 8, f[i]) != 8)
165 fseek(f[i], -12, SEEK_CUR);
169 fseek(f[shift < 0], abs(shift), SEEK_CUR);
171 fseek(f[0], skip_bytes, SEEK_CUR);
172 fseek(f[1], skip_bytes, SEEK_CUR);
176 int s0 = fread(buf[0], 1,
SIZE, f[0]);
177 int s1 = fread(buf[1], 1,
SIZE, f[1]);
179 for (j = 0; j <
FFMIN(s0, s1); j +=
len) {
183 int64_t a = buf[0][j];
184 int64_t
b = buf[1][j];
193 sse += (a -
b) * (a - b);
210 sse_d += (a -
b) * (a - b);
211 if (dist > maxdist_d)
230 uint64_t dev =
int_sqrt(((sse / i) *
F *
F) + (((sse % i) * F * F) + i / 2) / i);
233 284619LL * F + (1LL << 31)) / (1LL << 32);
237 printf(
"stddev:%5d.%02d PSNR:%3d.%02d MAXDIFF:%5"PRIu64
" bytes:%9d/%9d\n",
238 (
int)(dev / F), (
int)(dev % F),
239 (
int)(psnr / F), (
int)(psnr % F),
240 maxdist, size0, size1);
246 double psnr = INT_MAX;
247 double dev = sqrt(sse_d / i);
248 uint64_t
scale = (len == 4) ? (1ULL << 24) : (1ULL << 32);
251 psnr = 2 * log(DBL_MAX) - log(i / sse_d);
252 snprintf(psnr_str,
sizeof(psnr_str),
"%5.02f", psnr);
254 snprintf(psnr_str,
sizeof(psnr_str),
"inf");
256 maxdist = maxdist_d *
scale;
258 printf(
"stddev:%10.2f PSNR:%s MAXDIFF:%10"PRIu64
" bytes:%9d/%9d\n",
259 dev * scale, psnr_str, maxdist, size0, size1);
266 int main(
int argc,
char *argv[])
270 int shift_first= argc < 5 ? 0 : atoi(argv[4]);
271 int skip_bytes = argc < 6 ? 0 : atoi(argv[5]);
272 int shift_last = shift_first + (argc < 7 ? 0 : atoi(argv[6]));
275 int max_psnr_shift = 0;
278 if (!strcmp(argv[3],
"u8")) {
280 }
else if (!strcmp(argv[3],
"s16")) {
282 }
else if (!strcmp(argv[3],
"f32")) {
284 }
else if (!strcmp(argv[3],
"f64")) {
288 len = strtol(argv[3], &end, 0);
289 if (*end || len < 1 || len > 2) {
290 fprintf(stderr,
"Unsupported sample format: %s\n", argv[3]);
297 printf(
"tiny_psnr <file1> <file2> [<elem size> [<shift> [<skip bytes> [<shift search range>]]]]\n");
298 printf(
"WAV headers are skipped automatically.\n");
302 f[0] = fopen(argv[1],
"rb");
303 f[1] = fopen(argv[2],
"rb");
304 if (!f[0] || !f[1]) {
305 fprintf(stderr,
"Could not open input files.\n");
309 for (shift = shift_first; shift <= shift_last; shift++) {
311 if (psnr > max_psnr || (shift < 0 && psnr == max_psnr)) {
313 max_psnr_shift =
shift;
316 if (shift_last > shift_first)
317 printf(
"Best PSNR is %3d.%02d for shift %i\n", (
int)(max_psnr /
F), (
int)(max_psnr %
F), max_psnr_shift);
static int shift(int a, int b)
static int64_t log16(uint64_t a)
static int sse(MpegEncContext *s, uint8_t *src1, uint8_t *src2, int w, int h, int stride)
static av_cold int end(AVCodecContext *avctx)
static double psnr(double d)
static av_unused const uint8_t * skip_bytes(CABACContext *c, int n)
Skip n bytes and reset the decoder.
static uint64_t int_sqrt(uint64_t a)
static float get_f32l(uint8_t *p)
static int16_t get_s16l(uint8_t *p)
static const uint16_t scale[4]
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
static int run_psnr(FILE *f[2], int len, int shift, int skip_bytes)
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);ff_audio_convert_init_arm(ac);ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
int main(int argc, char **argv)
static double get_f64l(uint8_t *p)