| /* |
| * Copyright (c) 2012-2013 Paul B Mahol |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/parseutils.h" |
| #include "libavutil/pixdesc.h" |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| enum HistogramMode { |
| MODE_LEVELS, |
| MODE_WAVEFORM, |
| MODE_COLOR, |
| MODE_COLOR2, |
| MODE_NB |
| }; |
| |
| typedef struct HistogramContext { |
| const AVClass *class; ///< AVClass context for log and options purpose |
| enum HistogramMode mode; |
| unsigned histogram[256]; |
| int ncomp; |
| const uint8_t *bg_color; |
| const uint8_t *fg_color; |
| int level_height; |
| int scale_height; |
| int step; |
| int waveform_mode; |
| int display_mode; |
| int levels_mode; |
| } HistogramContext; |
| |
| #define OFFSET(x) offsetof(HistogramContext, x) |
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| |
| static const AVOption histogram_options[] = { |
| { "mode", "set histogram mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_LEVELS}, 0, MODE_NB-1, FLAGS, "mode"}, |
| { "levels", "standard histogram", 0, AV_OPT_TYPE_CONST, {.i64=MODE_LEVELS}, 0, 0, FLAGS, "mode" }, |
| { "waveform", "per row/column luminance graph", 0, AV_OPT_TYPE_CONST, {.i64=MODE_WAVEFORM}, 0, 0, FLAGS, "mode" }, |
| { "color", "chroma values in vectorscope", 0, AV_OPT_TYPE_CONST, {.i64=MODE_COLOR}, 0, 0, FLAGS, "mode" }, |
| { "color2", "chroma values in vectorscope", 0, AV_OPT_TYPE_CONST, {.i64=MODE_COLOR2}, 0, 0, FLAGS, "mode" }, |
| { "level_height", "set level height", OFFSET(level_height), AV_OPT_TYPE_INT, {.i64=200}, 50, 2048, FLAGS}, |
| { "scale_height", "set scale height", OFFSET(scale_height), AV_OPT_TYPE_INT, {.i64=12}, 0, 40, FLAGS}, |
| { "step", "set waveform step value", OFFSET(step), AV_OPT_TYPE_INT, {.i64=10}, 1, 255, FLAGS}, |
| { "waveform_mode", "set waveform mode", OFFSET(waveform_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "waveform_mode"}, |
| { "row", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "waveform_mode" }, |
| { "column", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "waveform_mode" }, |
| { "display_mode", "set display mode", OFFSET(display_mode), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, "display_mode"}, |
| { "parade", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "display_mode" }, |
| { "overlay", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "display_mode" }, |
| { "levels_mode", "set levels mode", OFFSET(levels_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "levels_mode"}, |
| { "linear", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "levels_mode" }, |
| { "logarithmic", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "levels_mode" }, |
| { NULL }, |
| }; |
| |
| AVFILTER_DEFINE_CLASS(histogram); |
| |
| static const enum AVPixelFormat color_pix_fmts[] = { |
| AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVJ444P, |
| AV_PIX_FMT_NONE |
| }; |
| |
| static const enum AVPixelFormat levels_pix_fmts[] = { |
| AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVJ444P, |
| AV_PIX_FMT_GRAY8, AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE |
| }; |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| HistogramContext *h = ctx->priv; |
| const enum AVPixelFormat *pix_fmts; |
| |
| switch (h->mode) { |
| case MODE_WAVEFORM: |
| case MODE_LEVELS: |
| pix_fmts = levels_pix_fmts; |
| break; |
| case MODE_COLOR: |
| case MODE_COLOR2: |
| pix_fmts = color_pix_fmts; |
| break; |
| default: |
| av_assert0(0); |
| } |
| |
| ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
| |
| return 0; |
| } |
| |
| static const uint8_t black_yuva_color[4] = { 0, 127, 127, 255 }; |
| static const uint8_t black_gbrp_color[4] = { 0, 0, 0, 255 }; |
| static const uint8_t white_yuva_color[4] = { 255, 127, 127, 255 }; |
| static const uint8_t white_gbrp_color[4] = { 255, 255, 255, 255 }; |
| |
| static int config_input(AVFilterLink *inlink) |
| { |
| HistogramContext *h = inlink->dst->priv; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| |
| h->ncomp = desc->nb_components; |
| |
| switch (inlink->format) { |
| case AV_PIX_FMT_GBRAP: |
| case AV_PIX_FMT_GBRP: |
| h->bg_color = black_gbrp_color; |
| h->fg_color = white_gbrp_color; |
| break; |
| default: |
| h->bg_color = black_yuva_color; |
| h->fg_color = white_yuva_color; |
| } |
| |
| return 0; |
| } |
| |
| static int config_output(AVFilterLink *outlink) |
| { |
| AVFilterContext *ctx = outlink->src; |
| HistogramContext *h = ctx->priv; |
| |
| switch (h->mode) { |
| case MODE_LEVELS: |
| outlink->w = 256; |
| outlink->h = (h->level_height + h->scale_height) * FFMAX(h->ncomp * h->display_mode, 1); |
| break; |
| case MODE_WAVEFORM: |
| if (h->waveform_mode) |
| outlink->h = 256 * FFMAX(h->ncomp * h->display_mode, 1); |
| else |
| outlink->w = 256 * FFMAX(h->ncomp * h->display_mode, 1); |
| break; |
| case MODE_COLOR: |
| case MODE_COLOR2: |
| outlink->h = outlink->w = 256; |
| break; |
| default: |
| av_assert0(0); |
| } |
| |
| outlink->sample_aspect_ratio = (AVRational){1,1}; |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| HistogramContext *h = inlink->dst->priv; |
| AVFilterContext *ctx = inlink->dst; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AVFrame *out; |
| const uint8_t *src; |
| uint8_t *dst; |
| int i, j, k, l; |
| |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) { |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| |
| out->pts = in->pts; |
| |
| for (k = 0; k < h->ncomp; k++) |
| for (i = 0; i < outlink->h; i++) |
| memset(out->data[k] + i * out->linesize[k], h->bg_color[k], outlink->w); |
| |
| switch (h->mode) { |
| case MODE_LEVELS: |
| for (k = 0; k < h->ncomp; k++) { |
| int start = k * (h->level_height + h->scale_height) * h->display_mode; |
| double max_hval_log; |
| unsigned max_hval = 0; |
| |
| for (i = 0; i < in->height; i++) { |
| src = in->data[k] + i * in->linesize[k]; |
| for (j = 0; j < in->width; j++) |
| h->histogram[src[j]]++; |
| } |
| |
| for (i = 0; i < 256; i++) |
| max_hval = FFMAX(max_hval, h->histogram[i]); |
| max_hval_log = log2(max_hval + 1); |
| |
| for (i = 0; i < outlink->w; i++) { |
| int col_height; |
| |
| if (h->levels_mode) |
| col_height = round(h->level_height * (1. - (log2(h->histogram[i] + 1) / max_hval_log))); |
| else |
| col_height = h->level_height - (h->histogram[i] * (int64_t)h->level_height + max_hval - 1) / max_hval; |
| |
| for (j = h->level_height - 1; j >= col_height; j--) { |
| if (h->display_mode) { |
| for (l = 0; l < h->ncomp; l++) |
| out->data[l][(j + start) * out->linesize[l] + i] = h->fg_color[l]; |
| } else { |
| out->data[k][(j + start) * out->linesize[k] + i] = 255; |
| } |
| } |
| for (j = h->level_height + h->scale_height - 1; j >= h->level_height; j--) |
| out->data[k][(j + start) * out->linesize[k] + i] = i; |
| } |
| |
| memset(h->histogram, 0, 256 * sizeof(unsigned)); |
| } |
| break; |
| case MODE_WAVEFORM: |
| if (h->waveform_mode) { |
| for (k = 0; k < h->ncomp; k++) { |
| int offset = k * 256 * h->display_mode; |
| for (i = 0; i < inlink->w; i++) { |
| for (j = 0; j < inlink->h; j++) { |
| int pos = (offset + |
| in->data[k][j * in->linesize[k] + i]) * |
| out->linesize[k] + i; |
| unsigned value = out->data[k][pos]; |
| value = FFMIN(value + h->step, 255); |
| out->data[k][pos] = value; |
| } |
| } |
| } |
| } else { |
| for (k = 0; k < h->ncomp; k++) { |
| int offset = k * 256 * h->display_mode; |
| for (i = 0; i < inlink->h; i++) { |
| src = in ->data[k] + i * in ->linesize[k]; |
| dst = out->data[k] + i * out->linesize[k]; |
| for (j = 0; j < inlink->w; j++) { |
| int pos = src[j] + offset; |
| unsigned value = dst[pos]; |
| value = FFMIN(value + h->step, 255); |
| dst[pos] = value; |
| } |
| } |
| } |
| } |
| break; |
| case MODE_COLOR: |
| for (i = 0; i < inlink->h; i++) { |
| int iw1 = i * in->linesize[1]; |
| int iw2 = i * in->linesize[2]; |
| for (j = 0; j < inlink->w; j++) { |
| int pos = in->data[1][iw1 + j] * out->linesize[0] + in->data[2][iw2 + j]; |
| if (out->data[0][pos] < 255) |
| out->data[0][pos]++; |
| } |
| } |
| for (i = 0; i < 256; i++) { |
| dst = out->data[0] + i * out->linesize[0]; |
| for (j = 0; j < 256; j++) { |
| if (!dst[j]) { |
| out->data[1][i * out->linesize[0] + j] = i; |
| out->data[2][i * out->linesize[0] + j] = j; |
| } |
| } |
| } |
| break; |
| case MODE_COLOR2: |
| for (i = 0; i < inlink->h; i++) { |
| int iw1 = i * in->linesize[1]; |
| int iw2 = i * in->linesize[2]; |
| for (j = 0; j < inlink->w; j++) { |
| int u = in->data[1][iw1 + j]; |
| int v = in->data[2][iw2 + j]; |
| int pos = u * out->linesize[0] + v; |
| if (!out->data[0][pos]) |
| out->data[0][pos] = FFABS(128 - u) + FFABS(128 - v); |
| out->data[1][pos] = u; |
| out->data[2][pos] = v; |
| } |
| } |
| break; |
| default: |
| av_assert0(0); |
| } |
| |
| av_frame_free(&in); |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static const AVFilterPad inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| .config_props = config_input, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_output, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter avfilter_vf_histogram = { |
| .name = "histogram", |
| .description = NULL_IF_CONFIG_SMALL("Compute and draw a histogram."), |
| .priv_size = sizeof(HistogramContext), |
| .query_formats = query_formats, |
| .inputs = inputs, |
| .outputs = outputs, |
| .priv_class = &histogram_class, |
| }; |