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avfilter/vf_colorcorrect: add median analyze mode
This commit is contained in:
Paul B Mahol
parent
0cacef58fa
commit
dc34bf45c5
@ -8235,7 +8235,15 @@ Default value is 1.
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@item analyze
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If set to anything other than @code{manual} it will analyze every frame and use derived
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parameters for filtering output frame. Can be @code{manual} or @code{average} or @code{minmax}.
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parameters for filtering output frame.
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Possible values are:
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@table @samp
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@item manual
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@item average
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@item minmax
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@item median
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@end table
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Default value is @code{manual}.
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@end table
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@ -31,6 +31,7 @@ typedef enum AnalyzeMode {
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MANUAL,
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AVERAGE,
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MINMAX,
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MEDIAN,
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NB_ANALYZE
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} AnalyzeMode;
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@ -49,6 +50,9 @@ typedef struct ColorCorrectContext {
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int planeheight[4];
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int planewidth[4];
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unsigned *uhistogram;
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unsigned *vhistogram;
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float (*analyzeret)[4];
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int (*do_analyze)(AVFilterContext *s, void *arg,
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@ -191,6 +195,114 @@ static int minmax_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_job
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return 0;
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}
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static int median_8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorCorrectContext *s = ctx->priv;
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AVFrame *frame = arg;
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const float imax = s->imax;
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const int width = s->planewidth[1];
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const int height = s->planeheight[1];
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const int ulinesize = frame->linesize[1];
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const int vlinesize = frame->linesize[2];
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const uint8_t *uptr = (const uint8_t *)frame->data[1];
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const uint8_t *vptr = (const uint8_t *)frame->data[2];
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unsigned *uhistogram = s->uhistogram;
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unsigned *vhistogram = s->vhistogram;
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const int half_size = width * height / 2;
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int umedian = s->max, vmedian = s->max;
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unsigned ucnt = 0, vcnt = 0;
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memset(uhistogram, 0, sizeof(*uhistogram) * (s->max + 1));
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memset(vhistogram, 0, sizeof(*vhistogram) * (s->max + 1));
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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uhistogram[uptr[x]]++;
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vhistogram[vptr[x]]++;
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}
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uptr += ulinesize;
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vptr += vlinesize;
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}
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for (int i = 0; i < s->max + 1; i++) {
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ucnt += uhistogram[i];
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if (ucnt >= half_size) {
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umedian = i;
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break;
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}
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}
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for (int i = 0; i < s->max + 1; i++) {
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vcnt += vhistogram[i];
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if (vcnt >= half_size) {
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vmedian = i;
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break;
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}
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}
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s->analyzeret[0][0] = imax * umedian - 0.5f;
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s->analyzeret[0][1] = imax * vmedian - 0.5f;
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s->analyzeret[0][2] = imax * umedian - 0.5f;
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s->analyzeret[0][3] = imax * vmedian - 0.5f;
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return 0;
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}
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static int median_16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ColorCorrectContext *s = ctx->priv;
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AVFrame *frame = arg;
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const float imax = s->imax;
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const int width = s->planewidth[1];
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const int height = s->planeheight[1];
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const int ulinesize = frame->linesize[1] / 2;
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const int vlinesize = frame->linesize[2] / 2;
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const uint16_t *uptr = (const uint16_t *)frame->data[1];
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const uint16_t *vptr = (const uint16_t *)frame->data[2];
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unsigned *uhistogram = s->uhistogram;
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unsigned *vhistogram = s->vhistogram;
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const int half_size = width * height / 2;
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int umedian = s->max, vmedian = s->max;
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unsigned ucnt = 0, vcnt = 0;
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memset(uhistogram, 0, sizeof(*uhistogram) * (s->max + 1));
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memset(vhistogram, 0, sizeof(*vhistogram) * (s->max + 1));
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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uhistogram[uptr[x]]++;
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vhistogram[vptr[x]]++;
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}
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uptr += ulinesize;
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vptr += vlinesize;
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}
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for (int i = 0; i < s->max + 1; i++) {
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ucnt += uhistogram[i];
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if (ucnt >= half_size) {
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umedian = i;
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break;
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}
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}
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for (int i = 0; i < s->max + 1; i++) {
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vcnt += vhistogram[i];
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if (vcnt >= half_size) {
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vmedian = i;
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break;
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}
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}
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s->analyzeret[0][0] = imax * umedian - 0.5f;
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s->analyzeret[0][1] = imax * vmedian - 0.5f;
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s->analyzeret[0][2] = imax * umedian - 0.5f;
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s->analyzeret[0][3] = imax * vmedian - 0.5f;
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return 0;
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}
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#define PROCESS() \
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float y = yptr[x * chroma_w] * imax; \
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float u = uptr[x] * imax - .5f; \
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@ -285,24 +397,25 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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AVFilterContext *ctx = inlink->dst;
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ColorCorrectContext *s = ctx->priv;
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const int nb_threads = FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx));
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const int nb_threads = s->analyze == MEDIAN ? 1 : FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx));
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if (s->analyze) {
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const int nb_athreads = s->analyze == MEDIAN ? 1 : nb_threads;
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float bl = 0.f, rl = 0.f, bh = 0.f, rh = 0.f;
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ff_filter_execute(ctx, s->do_analyze, frame, NULL, nb_threads);
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ff_filter_execute(ctx, s->do_analyze, frame, NULL, nb_athreads);
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for (int i = 0; i < nb_threads; i++) {
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for (int i = 0; i < nb_athreads; i++) {
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bl += s->analyzeret[i][0];
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rl += s->analyzeret[i][1];
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bh += s->analyzeret[i][2];
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rh += s->analyzeret[i][3];
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}
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bl /= nb_threads;
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rl /= nb_threads;
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bh /= nb_threads;
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rh /= nb_threads;
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bl /= nb_athreads;
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rl /= nb_athreads;
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bh /= nb_athreads;
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rh /= nb_athreads;
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s->bl = -bl;
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s->rl = -rl;
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@ -347,6 +460,14 @@ static av_cold int config_input(AVFilterLink *inlink)
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s->imax = 1.f / s->max;
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s->do_slice = s->depth <= 8 ? colorcorrect_slice8 : colorcorrect_slice16;
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s->uhistogram = av_calloc(s->max == 255 ? 256 : 65536, sizeof(*s->uhistogram));
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if (!s->uhistogram)
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return AVERROR(ENOMEM);
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s->vhistogram = av_calloc(s->max == 255 ? 256 : 65536, sizeof(*s->vhistogram));
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if (!s->vhistogram)
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return AVERROR(ENOMEM);
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s->analyzeret = av_calloc(inlink->h, sizeof(*s->analyzeret));
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if (!s->analyzeret)
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return AVERROR(ENOMEM);
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@ -360,6 +481,9 @@ static av_cold int config_input(AVFilterLink *inlink)
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case MINMAX:
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s->do_analyze = s->depth <= 8 ? minmax_slice8 : minmax_slice16;
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break;
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case MEDIAN:
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s->do_analyze = s->depth <= 8 ? median_8 : median_16;
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break;
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default:
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return AVERROR_BUG;
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}
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@ -411,6 +535,7 @@ static const AVOption colorcorrect_options[] = {
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{ "manual", "manually set options", 0, AV_OPT_TYPE_CONST, {.i64=MANUAL}, 0, 0, VF, "analyze" },
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{ "average", "use average pixels", 0, AV_OPT_TYPE_CONST, {.i64=AVERAGE}, 0, 0, VF, "analyze" },
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{ "minmax", "use minmax pixels", 0, AV_OPT_TYPE_CONST, {.i64=MINMAX}, 0, 0, VF, "analyze" },
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{ "median", "use median pixels", 0, AV_OPT_TYPE_CONST, {.i64=MEDIAN}, 0, 0, VF, "analyze" },
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{ NULL }
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};
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