* Caculate the SSIM between two input videos.
*/
+#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
#include "internal.h"
+#include "ssim.h"
#include "video.h"
typedef struct SSIMContext {
char *stats_file_str;
int nb_components;
uint64_t nb_frames;
- double ssim[4];
+ double ssim[4], ssim_total;
char comps[4];
- int *coefs;
+ float coefs[4];
uint8_t rgba_map[4];
int planewidth[4];
int planeheight[4];
int *temp;
+ int is_rgb;
+ SSIMDSPContext dsp;
} SSIMContext;
#define OFFSET(x) offsetof(SSIMContext, x)
AVFILTER_DEFINE_CLASS(ssim);
-static int rgb_coefs[4] = { 1, 1, 1, 3};
-static int yuv_coefs[4] = { 4, 1, 1, 6};
-static int gray_coefs[4] = { 1, 0, 0, 1};
-
static void set_meta(AVDictionary **metadata, const char *key, char comp, float d)
{
char value[128];
}
}
-static void ssim_4x4x2_core(const uint8_t *main, int main_stride,
- const uint8_t *ref, int ref_stride,
- int sums[2][4])
+static void ssim_4x4xn(const uint8_t *main, ptrdiff_t main_stride,
+ const uint8_t *ref, ptrdiff_t ref_stride,
+ int (*sums)[4], int width)
{
int x, y, z;
- for (z = 0; z < 2; z++) {
+ for (z = 0; z < width; z++) {
uint32_t s1 = 0, s2 = 0, ss = 0, s12 = 0;
for (y = 0; y < 4; y++) {
/ ((float)(fs1 * fs1 + fs2 * fs2 + ssim_c1) * (float)(vars + ssim_c2));
}
-static float ssim_end4(int sum0[5][4], int sum1[5][4], int width)
+static float ssim_endn(const int (*sum0)[4], const int (*sum1)[4], int width)
{
float ssim = 0.0;
int i;
- for( i = 0; i < width; i++ )
+ for (i = 0; i < width; i++)
ssim += ssim_end1(sum0[i][0] + sum0[i + 1][0] + sum1[i][0] + sum1[i + 1][0],
sum0[i][1] + sum0[i + 1][1] + sum1[i][1] + sum1[i + 1][1],
sum0[i][2] + sum0[i + 1][2] + sum1[i][2] + sum1[i + 1][2],
return ssim;
}
-static float ssim_plane(uint8_t *main, int main_stride,
+static float ssim_plane(SSIMDSPContext *dsp,
+ uint8_t *main, int main_stride,
uint8_t *ref, int ref_stride,
int width, int height, void *temp)
{
- int z = 0;
- int x, y;
+ int z = 0, y;
float ssim = 0.0;
int (*sum0)[4] = temp;
int (*sum1)[4] = sum0 + (width >> 2) + 3;
for (y = 1; y < height; y++) {
for (; z <= y; z++) {
FFSWAP(void*, sum0, sum1);
- for (x = 0; x < width; x+=2)
- ssim_4x4x2_core(&main[4 * (x + z * main_stride)], main_stride,
- &ref[4 * (x + z * ref_stride)], ref_stride,
- &sum0[x]);
+ dsp->ssim_4x4_line(&main[4 * z * main_stride], main_stride,
+ &ref[4 * z * ref_stride], ref_stride,
+ sum0, width);
}
- for (x = 0; x < width - 1; x += 4)
- ssim += ssim_end4(sum0 + x, sum1 + x, FFMIN(4, width - x - 1));
+ ssim += dsp->ssim_end_line((const int (*)[4])sum0, (const int (*)[4])sum1, width - 1);
}
return ssim / ((height - 1) * (width - 1));
{
AVDictionary **metadata = avpriv_frame_get_metadatap(main);
SSIMContext *s = ctx->priv;
- float c[4], ssimv;
+ float c[4], ssimv = 0.0;
int i;
s->nb_frames++;
- for (i = 0; i < s->nb_components; i++)
- c[i] = ssim_plane(main->data[i], main->linesize[i],
+ for (i = 0; i < s->nb_components; i++) {
+ c[i] = ssim_plane(&s->dsp, main->data[i], main->linesize[i],
ref->data[i], ref->linesize[i],
s->planewidth[i], s->planeheight[i], s->temp);
-
- ssimv = (c[0] * s->coefs[0] + c[1] * s->coefs[1] + c[2] * s->coefs[2]) / s->coefs[3];
-
- for (i = 0; i < s->nb_components; i++)
- set_meta(metadata, "lavfi.ssim.", s->comps[i], c[i]);
+ ssimv += s->coefs[i] * c[i];
+ s->ssim[i] += c[i];
+ }
+ for (i = 0; i < s->nb_components; i++) {
+ int cidx = s->is_rgb ? s->rgba_map[i] : i;
+ set_meta(metadata, "lavfi.ssim.", s->comps[i], c[cidx]);
+ }
+ s->ssim_total += ssimv;
set_meta(metadata, "lavfi.ssim.All", 0, ssimv);
- set_meta(metadata, "lavfi.ssim.dB", 0, ssim_db(c[0] * s->coefs[0] + c[1] * s->coefs[1] + c[2] * s->coefs[2], s->coefs[3]));
+ set_meta(metadata, "lavfi.ssim.dB", 0, ssim_db(ssimv, 1.0));
if (s->stats_file) {
fprintf(s->stats_file, "n:%"PRId64" ", s->nb_frames);
- for (i = 0; i < s->nb_components; i++)
- fprintf(s->stats_file, "%c:%f ", s->comps[i], c[i]);
+ for (i = 0; i < s->nb_components; i++) {
+ int cidx = s->is_rgb ? s->rgba_map[i] : i;
+ fprintf(s->stats_file, "%c:%f ", s->comps[i], c[cidx]);
+ }
- fprintf(s->stats_file, "All:%f (%f)\n", ssimv, ssim_db(c[0] * s->coefs[0] + c[1] * s->coefs[1] + c[2] * s->coefs[2], s->coefs[3]));
+ fprintf(s->stats_file, "All:%f (%f)\n", ssimv, ssim_db(ssimv, 1.0));
}
- s->ssim[0] += c[0];
- s->ssim[1] += c[1];
- s->ssim[2] += c[2];
-
return main;
}
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
AVFilterContext *ctx = inlink->dst;
SSIMContext *s = ctx->priv;
- int is_rgb;
+ int sum = 0, i;
s->nb_components = desc->nb_components;
return AVERROR(EINVAL);
}
- is_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;
- s->comps[0] = is_rgb ? 'R' : 'Y';
- s->comps[1] = is_rgb ? 'G' : 'U';
- s->comps[2] = is_rgb ? 'B' : 'V';
+ s->is_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;
+ s->comps[0] = s->is_rgb ? 'R' : 'Y';
+ s->comps[1] = s->is_rgb ? 'G' : 'U';
+ s->comps[2] = s->is_rgb ? 'B' : 'V';
s->comps[3] = 'A';
- if (is_rgb) {
- s->coefs = rgb_coefs;
- } else if (s->nb_components == 1) {
- s->coefs = gray_coefs;
- } else {
- s->coefs = yuv_coefs;
- }
-
s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
s->planewidth[1] = s->planewidth[2] = FF_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = inlink->w;
+ for (i = 0; i < s->nb_components; i++)
+ sum += s->planeheight[i] * s->planewidth[i];
+ for (i = 0; i < s->nb_components; i++)
+ s->coefs[i] = (double) s->planeheight[i] * s->planewidth[i] / sum;
s->temp = av_malloc((2 * inlink->w + 12) * sizeof(*s->temp));
if (!s->temp)
return AVERROR(ENOMEM);
+ s->dsp.ssim_4x4_line = ssim_4x4xn;
+ s->dsp.ssim_end_line = ssim_endn;
+ if (ARCH_X86)
+ ff_ssim_init_x86(&s->dsp);
+
return 0;
}
SSIMContext *s = ctx->priv;
if (s->nb_frames > 0) {
- if (s->nb_components == 3) {
- av_log(ctx, AV_LOG_INFO, "SSIM %c:%f %c:%f %c:%f All:%f (%f)\n",
- s->comps[0], s->ssim[0] / s->nb_frames,
- s->comps[1], s->ssim[1] / s->nb_frames,
- s->comps[2], s->ssim[2] / s->nb_frames,
- (s->ssim[0] * 4 + s->ssim[1] + s->ssim[2]) / (s->nb_frames * 6),
- ssim_db(s->ssim[0] * 4 + s->ssim[1] + s->ssim[2], s->nb_frames * 6));
- } else if (s->nb_components == 1) {
- av_log(ctx, AV_LOG_INFO, "SSIM All:%f (%f)\n",
- s->ssim[0] / s->nb_frames, ssim_db(s->ssim[0], s->nb_frames));
+ char buf[256];
+ int i;
+ buf[0] = 0;
+ for (i = 0; i < s->nb_components; i++) {
+ int c = s->is_rgb ? s->rgba_map[i] : i;
+ av_strlcatf(buf, sizeof(buf), " %c:%f", s->comps[i], s->ssim[c] / s->nb_frames);
}
+ av_log(ctx, AV_LOG_INFO, "SSIM%s All:%f (%f)\n", buf,
+ s->ssim_total / s->nb_frames, ssim_db(s->ssim_total, s->nb_frames));
}
ff_dualinput_uninit(&s->dinput);
projects / ffmpeg / blobdiff