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/* |
* 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 waveform_mirror; |
int display_mode; |
int levels_mode; |
const AVPixFmtDescriptor *desc; |
} 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" }, |
{ "waveform_mirror", "set waveform mirroring", OFFSET(waveform_mirror), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "waveform_mirror"}, |
{ "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 } |
}; |
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AVFILTER_DEFINE_CLASS(histogram); |
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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 const enum AVPixelFormat waveform_pix_fmts[] = { |
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, |
AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, |
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, |
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, |
AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, |
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, |
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P, |
AV_PIX_FMT_GRAY8, |
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: |
pix_fmts = waveform_pix_fmts; |
break; |
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); |
} |
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ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
|
return 0; |
} |
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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; |
|
h->desc = av_pix_fmt_desc_get(inlink->format); |
h->ncomp = h->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; |
} |
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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; |
} |
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static void gen_waveform(HistogramContext *h, AVFrame *inpicref, AVFrame *outpicref, |
int component, int intensity, int offset, int col_mode) |
{ |
const int plane = h->desc->comp[component].plane; |
const int mirror = h->waveform_mirror; |
const int is_chroma = (component == 1 || component == 2); |
const int shift_w = (is_chroma ? h->desc->log2_chroma_w : 0); |
const int shift_h = (is_chroma ? h->desc->log2_chroma_h : 0); |
const int src_linesize = inpicref->linesize[plane]; |
const int dst_linesize = outpicref->linesize[plane]; |
const int dst_signed_linesize = dst_linesize * (mirror == 1 ? -1 : 1); |
uint8_t *src_data = inpicref->data[plane]; |
uint8_t *dst_data = outpicref->data[plane] + (col_mode ? (offset >> shift_h) * dst_linesize : offset >> shift_w); |
uint8_t * const dst_bottom_line = dst_data + dst_linesize * ((256 >> shift_h) - 1); |
uint8_t * const dst_line = (mirror ? dst_bottom_line : dst_data); |
const uint8_t max = 255 - intensity; |
const int src_h = FF_CEIL_RSHIFT(inpicref->height, shift_h); |
const int src_w = FF_CEIL_RSHIFT(inpicref->width, shift_w); |
uint8_t *dst, *p; |
int y; |
|
if (!col_mode && mirror) |
dst_data += 256 >> shift_w; |
for (y = 0; y < src_h; y++) { |
const uint8_t *src_data_end = src_data + src_w; |
dst = dst_line; |
for (p = src_data; p < src_data_end; p++) { |
uint8_t *target; |
if (col_mode) { |
target = dst++ + dst_signed_linesize * (*p >> shift_h); |
} else { |
if (mirror) |
target = dst_data - (*p >> shift_w); |
else |
target = dst_data + (*p >> shift_w); |
} |
if (*target <= max) |
*target += intensity; |
else |
*target = 255; |
} |
src_data += src_linesize; |
dst_data += dst_linesize; |
} |
} |
|
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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); |
} |
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out->pts = in->pts; |
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for (k = 0; k < h->ncomp; k++) { |
const int is_chroma = (k == 1 || k == 2); |
const int dst_h = FF_CEIL_RSHIFT(outlink->h, (is_chroma ? h->desc->log2_chroma_h : 0)); |
const int dst_w = FF_CEIL_RSHIFT(outlink->w, (is_chroma ? h->desc->log2_chroma_w : 0)); |
for (i = 0; i < dst_h ; i++) |
memset(out->data[h->desc->comp[k].plane] + |
i * out->linesize[h->desc->comp[k].plane], |
h->bg_color[k], dst_w); |
} |
|
switch (h->mode) { |
case MODE_LEVELS: |
for (k = 0; k < h->ncomp; k++) { |
const int p = h->desc->comp[k].plane; |
const int start = k * (h->level_height + h->scale_height) * h->display_mode; |
double max_hval_log; |
unsigned max_hval = 0; |
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for (i = 0; i < in->height; i++) { |
src = in->data[p] + i * in->linesize[p]; |
for (j = 0; j < in->width; j++) |
h->histogram[src[j]]++; |
} |
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for (i = 0; i < 256; i++) |
max_hval = FFMAX(max_hval, h->histogram[i]); |
max_hval_log = log2(max_hval + 1); |
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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[p][(j + start) * out->linesize[p] + i] = 255; |
} |
} |
for (j = h->level_height + h->scale_height - 1; j >= h->level_height; j--) |
out->data[p][(j + start) * out->linesize[p] + i] = i; |
} |
|
memset(h->histogram, 0, 256 * sizeof(unsigned)); |
} |
break; |
case MODE_WAVEFORM: |
for (k = 0; k < h->ncomp; k++) { |
const int offset = k * 256 * h->display_mode; |
gen_waveform(h, in, out, k, h->step, offset, h->waveform_mode); |
} |
break; |
case MODE_COLOR: |
for (i = 0; i < inlink->h; i++) { |
const int iw1 = i * in->linesize[1]; |
const int iw2 = i * in->linesize[2]; |
for (j = 0; j < inlink->w; j++) { |
const 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++) { |
const int iw1 = i * in->linesize[1]; |
const int iw2 = i * in->linesize[2]; |
for (j = 0; j < inlink->w; j++) { |
const int u = in->data[1][iw1 + j]; |
const int v = in->data[2][iw2 + j]; |
const 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); |
} |
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av_frame_free(&in); |
return ff_filter_frame(outlink, out); |
} |
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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, |
}; |