Dana 12. 7. 2015. 01:56 osoba "Ronald S. Bultje" <rsbul...@gmail.com>
napisala je:
>
> ---
> libavfilter/vf_ssim.c | 81
+++++++++++++++++++++++----------------------------
> 1 file changed, 37 insertions(+), 44 deletions(-)
>
> diff --git a/libavfilter/vf_ssim.c b/libavfilter/vf_ssim.c
> index 3ef122f..b1c3368 100644
> --- a/libavfilter/vf_ssim.c
> +++ b/libavfilter/vf_ssim.c
> @@ -34,6 +34,7 @@
> * Caculate the SSIM between two input videos.
> */
>
> +#include "libavutil/avstring.h"
> #include "libavutil/opt.h"
> #include "libavutil/pixdesc.h"
> #include "avfilter.h"
> @@ -50,13 +51,14 @@ 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;
> } SSIMContext;
>
> #define OFFSET(x) offsetof(SSIMContext, x)
> @@ -70,10 +72,6 @@ static const AVOption ssim_options[] = {
>
> AVFILTER_DEFINE_CLASS(ssim);
>
> -static const int rgb_coefs[4] = { 1, 1, 1, 3};
> -static const int yuv_coefs[4] = { 4, 1, 1, 6};
> -static const int gray_coefs[4] = { 1, 0, 0, 1};
> -
> static void set_meta(AVDictionary **metadata, const char *key, char
comp, float d)
> {
> char value[128];
> @@ -185,37 +183,38 @@ static AVFrame *do_ssim(AVFilterContext *ctx,
AVFrame *main,
> {
> 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++)
> + for (i = 0; i < s->nb_components; i++) {
> c[i] = ssim_plane(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;
> }
>
> @@ -264,7 +263,7 @@ static int config_input_ref(AVFilterLink *inlink)
> 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;
>
> @@ -278,24 +277,20 @@ static int config_input_ref(AVFilterLink *inlink)
> 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)
> @@ -340,17 +335,15 @@ static av_cold void uninit(AVFilterContext *ctx)
> 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);
> --
> 2.1.2
>
>
Should be ok if ssim results are same before and after this patch for 420p
case.
_______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
