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https://github.com/FFmpeg/FFmpeg.git
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b4f5201967
If one looks at the many query_formats callbacks in existence, one will immediately recognize that there is one type of default callback for video and a slightly different default callback for audio: It is "return ff_set_common_formats_from_list(ctx, pix_fmts);" for video with a filter-specific pix_fmts list. For audio, it is the same with a filter-specific sample_fmts list together with ff_set_common_all_samplerates() and ff_set_common_all_channel_counts(). This commit allows to remove the boilerplate query_formats callbacks by replacing said callback with a union consisting the old callback and pointers for pixel and sample format arrays. For the not uncommon case in which these lists only contain a single entry (besides the sentinel) enum AVPixelFormat and enum AVSampleFormat fields are also added to the union to store them directly in the AVFilter, thereby avoiding a relocation. The state of said union will be contained in a new, dedicated AVFilter field (the nb_inputs and nb_outputs fields have been shrunk to uint8_t in order to create a hole for this new field; this is no problem, as the maximum of all the nb_inputs is four; for nb_outputs it is only two). The state's default value coincides with the earlier default of query_formats being unset, namely that the filter accepts all formats (and also sample rates and channel counts/layouts for audio) provided that these properties agree coincide for all inputs and outputs. By using different union members for audio and video filters the type-unsafety of using the same functions for audio and video lists will furthermore be more confined to formats.c than before. When the new fields are used, they will also avoid allocations: Currently something nearly equivalent to ff_default_query_formats() is called after every successful call to a query_formats callback; yet in the common case that the newly allocated AVFilterFormats are not used at all (namely if there are no free links) these newly allocated AVFilterFormats are freed again without ever being used. Filters no longer using the callback will not exhibit this any more. Reviewed-by: Paul B Mahol <onemda@gmail.com> Reviewed-by: Nicolas George <george@nsup.org> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
517 lines
17 KiB
C
517 lines
17 KiB
C
/*
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* Copyright (c) 2015 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "float.h"
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#include "libavutil/avstring.h"
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#include "libavutil/eval.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct DrawGraphContext {
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const AVClass *class;
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char *key[4];
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float min, max;
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char *fg_str[4];
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AVExpr *fg_expr[4];
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uint8_t bg[4];
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int mode;
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int slide;
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int w, h;
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AVRational frame_rate;
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AVFrame *out;
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int x;
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int prev_y[4];
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int first[4];
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float *values[4];
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int values_size[4];
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int nb_values;
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int64_t prev_pts;
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} DrawGraphContext;
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#define OFFSET(x) offsetof(DrawGraphContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption drawgraph_options[] = {
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{ "m1", "set 1st metadata key", OFFSET(key[0]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
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{ "fg1", "set 1st foreground color expression", OFFSET(fg_str[0]), AV_OPT_TYPE_STRING, {.str="0xffff0000"}, 0, 0, FLAGS },
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{ "m2", "set 2nd metadata key", OFFSET(key[1]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
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{ "fg2", "set 2nd foreground color expression", OFFSET(fg_str[1]), AV_OPT_TYPE_STRING, {.str="0xff00ff00"}, 0, 0, FLAGS },
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{ "m3", "set 3rd metadata key", OFFSET(key[2]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
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{ "fg3", "set 3rd foreground color expression", OFFSET(fg_str[2]), AV_OPT_TYPE_STRING, {.str="0xffff00ff"}, 0, 0, FLAGS },
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{ "m4", "set 4th metadata key", OFFSET(key[3]), AV_OPT_TYPE_STRING, {.str=""}, 0, 0, FLAGS },
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{ "fg4", "set 4th foreground color expression", OFFSET(fg_str[3]), AV_OPT_TYPE_STRING, {.str="0xffffff00"}, 0, 0, FLAGS },
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{ "bg", "set background color", OFFSET(bg), AV_OPT_TYPE_COLOR, {.str="white"}, 0, 0, FLAGS },
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{ "min", "set minimal value", OFFSET(min), AV_OPT_TYPE_FLOAT, {.dbl=-1.}, INT_MIN, INT_MAX, FLAGS },
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{ "max", "set maximal value", OFFSET(max), AV_OPT_TYPE_FLOAT, {.dbl=1.}, INT_MIN, INT_MAX, FLAGS },
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{ "mode", "set graph mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, "mode" },
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{"bar", "draw bars", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode"},
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{"dot", "draw dots", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode"},
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{"line", "draw lines", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "mode"},
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{ "slide", "set slide mode", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=0}, 0, 4, FLAGS, "slide" },
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{"frame", "draw new frames", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "slide"},
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{"replace", "replace old columns with new", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "slide"},
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{"scroll", "scroll from right to left", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "slide"},
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{"rscroll", "scroll from left to right", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, "slide"},
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{"picture", "display graph in single frame", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, FLAGS, "slide"},
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{ "size", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
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{ "s", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
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{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
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{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS_EXT(drawgraph, "(a)drawgraph", drawgraph_options);
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static const char *const var_names[] = { "MAX", "MIN", "VAL", NULL };
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enum { VAR_MAX, VAR_MIN, VAR_VAL, VAR_VARS_NB };
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static av_cold int init(AVFilterContext *ctx)
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{
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DrawGraphContext *s = ctx->priv;
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int ret, i;
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if (s->max <= s->min) {
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av_log(ctx, AV_LOG_ERROR, "max is same or lower than min\n");
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return AVERROR(EINVAL);
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}
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for (i = 0; i < 4; i++) {
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if (s->fg_str[i]) {
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ret = av_expr_parse(&s->fg_expr[i], s->fg_str[i], var_names,
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NULL, NULL, NULL, NULL, 0, ctx);
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if (ret < 0)
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return ret;
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}
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}
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s->first[0] = s->first[1] = s->first[2] = s->first[3] = 1;
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if (s->slide == 4) {
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s->values[0] = av_fast_realloc(NULL, &s->values_size[0], 2000);
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s->values[1] = av_fast_realloc(NULL, &s->values_size[1], 2000);
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s->values[2] = av_fast_realloc(NULL, &s->values_size[2], 2000);
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s->values[3] = av_fast_realloc(NULL, &s->values_size[3], 2000);
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if (!s->values[0] || !s->values[1] ||
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!s->values[2] || !s->values[3]) {
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return AVERROR(ENOMEM);
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}
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}
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return 0;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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AVFilterLink *outlink = ctx->outputs[0];
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_RGBA,
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AV_PIX_FMT_NONE
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};
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int ret;
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AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
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if ((ret = ff_formats_ref(fmts_list, &outlink->incfg.formats)) < 0)
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return ret;
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return 0;
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}
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static void clear_image(DrawGraphContext *s, AVFrame *out, AVFilterLink *outlink)
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{
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int i, j;
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int bg = AV_RN32(s->bg);
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for (i = 0; i < out->height; i++)
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for (j = 0; j < out->width; j++)
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AV_WN32(out->data[0] + i * out->linesize[0] + j * 4, bg);
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}
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static inline void draw_dot(int fg, int x, int y, AVFrame *out)
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{
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AV_WN32(out->data[0] + y * out->linesize[0] + x * 4, fg);
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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DrawGraphContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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AVDictionary *metadata;
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AVDictionaryEntry *e;
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AVFrame *out = s->out;
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AVFrame *clone = NULL;
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int64_t in_pts, out_pts;
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int i;
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if (s->slide == 4 && s->nb_values >= s->values_size[0] / sizeof(float)) {
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float *ptr;
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ptr = av_fast_realloc(s->values[0], &s->values_size[0], s->values_size[0] * 2);
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if (!ptr)
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return AVERROR(ENOMEM);
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s->values[0] = ptr;
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ptr = av_fast_realloc(s->values[1], &s->values_size[1], s->values_size[1] * 2);
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if (!ptr)
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return AVERROR(ENOMEM);
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s->values[1] = ptr;
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ptr = av_fast_realloc(s->values[2], &s->values_size[2], s->values_size[2] * 2);
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if (!ptr)
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return AVERROR(ENOMEM);
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s->values[2] = ptr;
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ptr = av_fast_realloc(s->values[3], &s->values_size[3], s->values_size[3] * 2);
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if (!ptr)
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return AVERROR(ENOMEM);
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s->values[3] = ptr;
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}
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if (s->slide != 4 || s->nb_values == 0) {
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if (!s->out || s->out->width != outlink->w ||
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s->out->height != outlink->h) {
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av_frame_free(&s->out);
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s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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out = s->out;
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if (!s->out) {
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av_frame_free(&in);
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return AVERROR(ENOMEM);
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}
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clear_image(s, out, outlink);
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}
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av_frame_copy_props(out, in);
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}
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metadata = in->metadata;
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for (i = 0; i < 4; i++) {
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double values[VAR_VARS_NB];
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int j, y, x, old;
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uint32_t fg, bg;
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float vf;
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if (s->slide == 4)
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s->values[i][s->nb_values] = NAN;
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e = av_dict_get(metadata, s->key[i], NULL, 0);
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if (!e || !e->value)
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continue;
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if (av_sscanf(e->value, "%f", &vf) != 1)
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continue;
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vf = av_clipf(vf, s->min, s->max);
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if (s->slide == 4) {
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s->values[i][s->nb_values] = vf;
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continue;
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}
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values[VAR_MIN] = s->min;
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values[VAR_MAX] = s->max;
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values[VAR_VAL] = vf;
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fg = av_expr_eval(s->fg_expr[i], values, NULL);
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bg = AV_RN32(s->bg);
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if (i == 0 && (s->x >= outlink->w || s->slide == 3)) {
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if (s->slide == 0 || s->slide == 1)
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s->x = 0;
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if (s->slide == 2) {
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s->x = outlink->w - 1;
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for (j = 0; j < outlink->h; j++) {
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memmove(out->data[0] + j * out->linesize[0] ,
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out->data[0] + j * out->linesize[0] + 4,
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(outlink->w - 1) * 4);
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}
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} else if (s->slide == 3) {
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s->x = 0;
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for (j = 0; j < outlink->h; j++) {
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memmove(out->data[0] + j * out->linesize[0] + 4,
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out->data[0] + j * out->linesize[0],
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(outlink->w - 1) * 4);
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}
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} else if (s->slide == 0) {
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clear_image(s, out, outlink);
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}
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}
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x = s->x;
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y = (outlink->h - 1) * (1 - ((vf - s->min) / (s->max - s->min)));
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switch (s->mode) {
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case 0:
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if (i == 0 && (s->slide > 0))
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for (j = 0; j < outlink->h; j++)
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draw_dot(bg, x, j, out);
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old = AV_RN32(out->data[0] + y * out->linesize[0] + x * 4);
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for (j = y; j < outlink->h; j++) {
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if (old != bg &&
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(AV_RN32(out->data[0] + j * out->linesize[0] + x * 4) != old) ||
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AV_RN32(out->data[0] + FFMIN(j+1, outlink->h - 1) * out->linesize[0] + x * 4) != old) {
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draw_dot(fg, x, j, out);
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break;
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}
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draw_dot(fg, x, j, out);
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}
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break;
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case 1:
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if (i == 0 && (s->slide > 0))
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for (j = 0; j < outlink->h; j++)
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draw_dot(bg, x, j, out);
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draw_dot(fg, x, y, out);
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break;
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case 2:
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if (s->first[i]) {
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s->first[i] = 0;
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s->prev_y[i] = y;
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}
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if (i == 0 && (s->slide > 0)) {
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for (j = 0; j < y; j++)
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draw_dot(bg, x, j, out);
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for (j = outlink->h - 1; j > y; j--)
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draw_dot(bg, x, j, out);
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}
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if (y <= s->prev_y[i]) {
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for (j = y; j <= s->prev_y[i]; j++)
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draw_dot(fg, x, j, out);
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} else {
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for (j = s->prev_y[i]; j <= y; j++)
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draw_dot(fg, x, j, out);
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}
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s->prev_y[i] = y;
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break;
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}
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}
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s->nb_values++;
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s->x++;
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in_pts = in->pts;
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av_frame_free(&in);
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if (s->slide == 4)
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return 0;
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out_pts = av_rescale_q(in_pts, inlink->time_base, outlink->time_base);
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if (out_pts == s->prev_pts)
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return 0;
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clone = av_frame_clone(s->out);
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if (!clone)
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return AVERROR(ENOMEM);
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clone->pts = s->prev_pts = out_pts;
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return ff_filter_frame(outlink, clone);
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}
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static int request_frame(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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DrawGraphContext *s = ctx->priv;
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AVFrame *out = s->out;
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int ret, i, k, step, l;
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ret = ff_request_frame(ctx->inputs[0]);
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if (s->slide == 4 && ret == AVERROR_EOF && s->nb_values > 0) {
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s->x = l = 0;
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step = ceil(s->nb_values / (float)s->w);
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for (k = 0; k < s->nb_values; k++) {
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for (i = 0; i < 4; i++) {
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double values[VAR_VARS_NB];
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int j, y, x, old;
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uint32_t fg, bg;
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float vf = s->values[i][k];
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if (isnan(vf))
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continue;
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values[VAR_MIN] = s->min;
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values[VAR_MAX] = s->max;
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values[VAR_VAL] = vf;
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fg = av_expr_eval(s->fg_expr[i], values, NULL);
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bg = AV_RN32(s->bg);
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x = s->x;
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y = (outlink->h - 1) * (1 - ((vf - s->min) / (s->max - s->min)));
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switch (s->mode) {
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case 0:
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old = AV_RN32(out->data[0] + y * out->linesize[0] + x * 4);
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for (j = y; j < outlink->h; j++) {
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if (old != bg &&
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(AV_RN32(out->data[0] + j * out->linesize[0] + x * 4) != old) ||
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AV_RN32(out->data[0] + FFMIN(j+1, outlink->h - 1) * out->linesize[0] + x * 4) != old) {
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draw_dot(fg, x, j, out);
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break;
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}
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draw_dot(fg, x, j, out);
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}
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break;
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case 1:
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draw_dot(fg, x, y, out);
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break;
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case 2:
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if (s->first[i]) {
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s->first[i] = 0;
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s->prev_y[i] = y;
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}
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if (y <= s->prev_y[i]) {
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for (j = y; j <= s->prev_y[i]; j++)
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draw_dot(fg, x, j, out);
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} else {
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for (j = s->prev_y[i]; j <= y; j++)
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draw_dot(fg, x, j, out);
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}
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s->prev_y[i] = y;
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break;
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}
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}
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l++;
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if (l >= step) {
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l = 0;
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s->x++;
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}
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}
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s->nb_values = 0;
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out->pts = 0;
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ret = ff_filter_frame(ctx->outputs[0], s->out);
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}
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return ret;
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}
|
|
|
|
static int config_output(AVFilterLink *outlink)
|
|
{
|
|
DrawGraphContext *s = outlink->src->priv;
|
|
|
|
outlink->w = s->w;
|
|
outlink->h = s->h;
|
|
outlink->sample_aspect_ratio = (AVRational){1,1};
|
|
outlink->frame_rate = s->frame_rate;
|
|
outlink->time_base = av_inv_q(outlink->frame_rate);
|
|
s->prev_pts = AV_NOPTS_VALUE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
DrawGraphContext *s = ctx->priv;
|
|
int i;
|
|
|
|
for (i = 0; i < 4; i++)
|
|
av_expr_free(s->fg_expr[i]);
|
|
|
|
if (s->slide != 4)
|
|
av_frame_free(&s->out);
|
|
|
|
av_freep(&s->values[0]);
|
|
av_freep(&s->values[1]);
|
|
av_freep(&s->values[2]);
|
|
av_freep(&s->values[3]);
|
|
}
|
|
|
|
#if CONFIG_DRAWGRAPH_FILTER
|
|
|
|
static const AVFilterPad drawgraph_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad drawgraph_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
.request_frame = request_frame,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_vf_drawgraph = {
|
|
.name = "drawgraph",
|
|
.description = NULL_IF_CONFIG_SMALL("Draw a graph using input video metadata."),
|
|
.priv_size = sizeof(DrawGraphContext),
|
|
.priv_class = &drawgraph_class,
|
|
.init = init,
|
|
.uninit = uninit,
|
|
FILTER_INPUTS(drawgraph_inputs),
|
|
FILTER_OUTPUTS(drawgraph_outputs),
|
|
FILTER_QUERY_FUNC(query_formats),
|
|
};
|
|
|
|
#endif // CONFIG_DRAWGRAPH_FILTER
|
|
|
|
#if CONFIG_ADRAWGRAPH_FILTER
|
|
|
|
static const AVFilterPad adrawgraph_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad adrawgraph_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
.request_frame = request_frame,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_avf_adrawgraph = {
|
|
.name = "adrawgraph",
|
|
.description = NULL_IF_CONFIG_SMALL("Draw a graph using input audio metadata."),
|
|
.priv_class = &drawgraph_class,
|
|
.priv_size = sizeof(DrawGraphContext),
|
|
.init = init,
|
|
.uninit = uninit,
|
|
FILTER_INPUTS(adrawgraph_inputs),
|
|
FILTER_OUTPUTS(adrawgraph_outputs),
|
|
FILTER_QUERY_FUNC(query_formats),
|
|
};
|
|
#endif // CONFIG_ADRAWGRAPH_FILTER
|