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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>
511 lines
18 KiB
C
511 lines
18 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 "libavutil/avstring.h"
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#include "libavutil/channel_layout.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 "libavutil/parseutils.h"
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#include "libavutil/xga_font_data.h"
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#include "avfilter.h"
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#include "filters.h"
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#include "formats.h"
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#include "audio.h"
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#include "video.h"
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#include "internal.h"
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static const char *const var_names[] = { "VOLUME", "CHANNEL", "PEAK", NULL };
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enum { VAR_VOLUME, VAR_CHANNEL, VAR_PEAK, VAR_VARS_NB };
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enum DisplayScale { LINEAR, LOG, NB_DISPLAY_SCALE };
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typedef struct ShowVolumeContext {
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const AVClass *class;
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int w, h;
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int b;
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double f;
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AVRational frame_rate;
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char *color;
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int orientation;
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int step;
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float bgopacity;
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int mode;
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int nb_samples;
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AVFrame *out;
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AVExpr *c_expr;
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int draw_text;
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int draw_volume;
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double *values;
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uint32_t *color_lut;
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float *max;
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float rms_factor;
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int display_scale;
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double draw_persistent_duration; /* in second */
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uint8_t persistant_max_rgba[4];
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int persistent_max_frames; /* number of frames to check max value */
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float *max_persistent; /* max value for draw_persistent_max for each channel */
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int *nb_frames_max_display; /* number of frame for each channel, for displaying the max value */
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void (*meter)(float *src, int nb_samples, float *max, float factor);
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} ShowVolumeContext;
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#define OFFSET(x) offsetof(ShowVolumeContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption showvolume_options[] = {
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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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{ "b", "set border width", OFFSET(b), AV_OPT_TYPE_INT, {.i64=1}, 0, 5, FLAGS },
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{ "w", "set channel width", OFFSET(w), AV_OPT_TYPE_INT, {.i64=400}, 80, 8192, FLAGS },
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{ "h", "set channel height", OFFSET(h), AV_OPT_TYPE_INT, {.i64=20}, 1, 900, FLAGS },
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{ "f", "set fade", OFFSET(f), AV_OPT_TYPE_DOUBLE, {.dbl=0.95}, 0, 1, FLAGS },
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{ "c", "set volume color expression", OFFSET(color), AV_OPT_TYPE_STRING, {.str="PEAK*255+floor((1-PEAK)*255)*256+0xff000000"}, 0, 0, FLAGS },
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{ "t", "display channel names", OFFSET(draw_text), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
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{ "v", "display volume value", OFFSET(draw_volume), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
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{ "dm", "duration for max value display", OFFSET(draw_persistent_duration), AV_OPT_TYPE_DOUBLE, {.dbl=0.}, 0, 9000, FLAGS},
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{ "dmc","set color of the max value line", OFFSET(persistant_max_rgba), AV_OPT_TYPE_COLOR, {.str = "orange"}, 0, 0, FLAGS },
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{ "o", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "orientation" },
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{ "h", "horizontal", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "orientation" },
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{ "v", "vertical", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "orientation" },
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{ "s", "set step size", OFFSET(step), AV_OPT_TYPE_INT, {.i64=0}, 0, 5, FLAGS },
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{ "p", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, FLAGS },
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{ "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "mode" },
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{ "p", "peak", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode" },
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{ "r", "rms", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode" },
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{ "ds", "set display scale", OFFSET(display_scale), AV_OPT_TYPE_INT, {.i64=LINEAR}, LINEAR, NB_DISPLAY_SCALE - 1, FLAGS, "display_scale" },
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{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "display_scale" },
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{ "log", "log", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "display_scale" },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(showvolume);
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static av_cold int init(AVFilterContext *ctx)
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{
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ShowVolumeContext *s = ctx->priv;
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int ret;
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if (s->color) {
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ret = av_expr_parse(&s->c_expr, s->color, 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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return 0;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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AVFilterFormats *formats = NULL;
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AVFilterChannelLayouts *layouts = NULL;
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
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static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
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int ret;
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formats = ff_make_format_list(sample_fmts);
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if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
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return ret;
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layouts = ff_all_channel_counts();
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if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0)
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return ret;
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formats = ff_all_samplerates();
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if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
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return ret;
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formats = ff_make_format_list(pix_fmts);
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if ((ret = ff_formats_ref(formats, &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 find_peak(float *src, int nb_samples, float *peak, float factor)
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{
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int i;
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*peak = 0;
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for (i = 0; i < nb_samples; i++)
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*peak = FFMAX(*peak, FFABS(src[i]));
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}
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static void find_rms(float *src, int nb_samples, float *rms, float factor)
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{
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int i;
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for (i = 0; i < nb_samples; i++)
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*rms += factor * (src[i] * src[i] - *rms);
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}
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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ShowVolumeContext *s = ctx->priv;
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s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
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s->values = av_calloc(inlink->channels * VAR_VARS_NB, sizeof(double));
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if (!s->values)
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return AVERROR(ENOMEM);
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s->color_lut = av_calloc(s->w, sizeof(*s->color_lut) * inlink->channels);
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if (!s->color_lut)
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return AVERROR(ENOMEM);
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s->max = av_calloc(inlink->channels, sizeof(*s->max));
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if (!s->max)
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return AVERROR(ENOMEM);
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s->rms_factor = 10000. / inlink->sample_rate;
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switch (s->mode) {
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case 0: s->meter = find_peak; break;
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case 1: s->meter = find_rms; break;
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default: return AVERROR_BUG;
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}
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if (s->draw_persistent_duration > 0.) {
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s->persistent_max_frames = (int) FFMAX(av_q2d(s->frame_rate) * s->draw_persistent_duration, 1.);
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s->max_persistent = av_calloc(inlink->channels * s->persistent_max_frames, sizeof(*s->max_persistent));
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s->nb_frames_max_display = av_calloc(inlink->channels * s->persistent_max_frames, sizeof(*s->nb_frames_max_display));
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}
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return 0;
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}
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static int config_output(AVFilterLink *outlink)
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{
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ShowVolumeContext *s = outlink->src->priv;
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AVFilterLink *inlink = outlink->src->inputs[0];
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int ch;
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if (s->orientation) {
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outlink->h = s->w;
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outlink->w = s->h * inlink->channels + (inlink->channels - 1) * s->b;
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} else {
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outlink->w = s->w;
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outlink->h = s->h * inlink->channels + (inlink->channels - 1) * s->b;
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}
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outlink->sample_aspect_ratio = (AVRational){1,1};
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outlink->frame_rate = s->frame_rate;
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for (ch = 0; ch < inlink->channels; ch++) {
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int i;
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for (i = 0; i < s->w; i++) {
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float max = i / (float)(s->w - 1);
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s->values[ch * VAR_VARS_NB + VAR_PEAK] = max;
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s->values[ch * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
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s->values[ch * VAR_VARS_NB + VAR_CHANNEL] = ch;
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s->color_lut[ch * s->w + i] = av_expr_eval(s->c_expr, &s->values[ch * VAR_VARS_NB], NULL);
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}
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}
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return 0;
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}
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static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
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{
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const uint8_t *font;
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int font_height;
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int i;
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font = avpriv_cga_font, font_height = 8;
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for (i = 0; txt[i]; i++) {
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int char_y, mask;
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if (o) { /* vertical orientation */
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for (char_y = font_height - 1; char_y >= 0; char_y--) {
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uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x * 4;
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for (mask = 0x80; mask; mask >>= 1) {
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if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
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AV_WN32(&p[char_y * 4], ~AV_RN32(&p[char_y * 4]));
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p += pic->linesize[0];
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}
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}
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} else { /* horizontal orientation */
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uint8_t *p = pic->data[0] + y * pic->linesize[0] + (x + i * 8) * 4;
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for (char_y = 0; char_y < font_height; char_y++) {
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for (mask = 0x80; mask; mask >>= 1) {
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if (font[txt[i] * font_height + char_y] & mask)
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AV_WN32(p, ~AV_RN32(p));
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p += 4;
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}
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p += pic->linesize[0] - 8 * 4;
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}
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}
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}
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}
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static void clear_picture(ShowVolumeContext *s, AVFilterLink *outlink)
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{
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int i, j;
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const uint32_t bg = (uint32_t)(s->bgopacity * 255) << 24;
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for (i = 0; i < outlink->h; i++) {
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uint32_t *dst = (uint32_t *)(s->out->data[0] + i * s->out->linesize[0]);
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for (j = 0; j < outlink->w; j++)
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AV_WN32A(dst + j, bg);
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}
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}
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static inline int calc_max_draw(ShowVolumeContext *s, AVFilterLink *outlink, float max)
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{
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float max_val;
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if (s->display_scale == LINEAR) {
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max_val = max;
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} else { /* log */
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max_val = av_clipf(0.21 * log10(max) + 1, 0, 1);
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}
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if (s->orientation) { /* vertical */
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return outlink->h - outlink->h * max_val;
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} else { /* horizontal */
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return s->w * max_val;
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}
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}
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static inline void calc_persistent_max(ShowVolumeContext *s, float max, int channel)
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{
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/* update max value for persistent max display */
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if ((max >= s->max_persistent[channel]) || (s->nb_frames_max_display[channel] >= s->persistent_max_frames)) { /* update max value for display */
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s->max_persistent[channel] = max;
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s->nb_frames_max_display[channel] = 0;
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} else {
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s->nb_frames_max_display[channel] += 1; /* incremente display frame count */
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}
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}
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static inline void draw_max_line(ShowVolumeContext *s, int max_draw, int channel)
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{
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int k;
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if (s->orientation) { /* vertical */
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uint8_t *dst = s->out->data[0] + max_draw * s->out->linesize[0] + channel * (s->b + s->h) * 4;
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for (k = 0; k < s->h; k++) {
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memcpy(dst + k * 4, s->persistant_max_rgba, sizeof(s->persistant_max_rgba));
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}
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} else { /* horizontal */
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for (k = 0; k < s->h; k++) {
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uint8_t *dst = s->out->data[0] + (channel * s->h + channel * s->b + k) * s->out->linesize[0];
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memcpy(dst + max_draw * 4, s->persistant_max_rgba, sizeof(s->persistant_max_rgba));
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}
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}
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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ShowVolumeContext *s = ctx->priv;
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const int step = s->step;
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int c, j, k, max_draw;
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AVFrame *out;
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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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if (!s->out) {
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av_frame_free(&insamples);
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return AVERROR(ENOMEM);
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}
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clear_picture(s, outlink);
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}
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s->out->pts = insamples->pts;
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if ((s->f < 1.) && (s->f > 0.)) {
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for (j = 0; j < outlink->h; j++) {
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uint8_t *dst = s->out->data[0] + j * s->out->linesize[0];
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const uint32_t alpha = s->bgopacity * 255;
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for (k = 0; k < outlink->w; k++) {
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dst[k * 4 + 0] = FFMAX(dst[k * 4 + 0] * s->f, 0);
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dst[k * 4 + 1] = FFMAX(dst[k * 4 + 1] * s->f, 0);
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dst[k * 4 + 2] = FFMAX(dst[k * 4 + 2] * s->f, 0);
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dst[k * 4 + 3] = FFMAX(dst[k * 4 + 3] * s->f, alpha);
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}
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}
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} else if (s->f == 0.) {
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clear_picture(s, outlink);
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}
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if (s->orientation) { /* vertical */
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for (c = 0; c < inlink->channels; c++) {
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float *src = (float *)insamples->extended_data[c];
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uint32_t *lut = s->color_lut + s->w * c;
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float max;
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s->meter(src, insamples->nb_samples, &s->max[c], s->rms_factor);
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max = s->max[c];
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s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
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max = av_clipf(max, 0, 1);
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max_draw = calc_max_draw(s, outlink, max);
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for (j = max_draw; j < s->w; j++) {
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uint8_t *dst = s->out->data[0] + j * s->out->linesize[0] + c * (s->b + s->h) * 4;
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for (k = 0; k < s->h; k++) {
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AV_WN32A(&dst[k * 4], lut[s->w - j - 1]);
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if (j & step)
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j += step;
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}
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}
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if (s->h >= 8 && s->draw_text) {
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const char *channel_name = av_get_channel_name(av_channel_layout_extract_channel(insamples->channel_layout, c));
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if (!channel_name)
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continue;
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drawtext(s->out, c * (s->h + s->b) + (s->h - 10) / 2, outlink->h - 35, channel_name, 1);
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}
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if (s->draw_persistent_duration > 0.) {
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calc_persistent_max(s, max, c);
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max_draw = FFMAX(0, calc_max_draw(s, outlink, s->max_persistent[c]) - 1);
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draw_max_line(s, max_draw, c);
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}
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}
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|
} else { /* horizontal */
|
|
for (c = 0; c < inlink->channels; c++) {
|
|
float *src = (float *)insamples->extended_data[c];
|
|
uint32_t *lut = s->color_lut + s->w * c;
|
|
float max;
|
|
|
|
s->meter(src, insamples->nb_samples, &s->max[c], s->rms_factor);
|
|
max = s->max[c];
|
|
|
|
s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
|
|
max = av_clipf(max, 0, 1);
|
|
max_draw = calc_max_draw(s, outlink, max);
|
|
|
|
for (j = 0; j < s->h; j++) {
|
|
uint8_t *dst = s->out->data[0] + (c * s->h + c * s->b + j) * s->out->linesize[0];
|
|
|
|
for (k = 0; k < max_draw; k++) {
|
|
AV_WN32A(dst + k * 4, lut[k]);
|
|
if (k & step)
|
|
k += step;
|
|
}
|
|
}
|
|
|
|
if (s->h >= 8 && s->draw_text) {
|
|
const char *channel_name = av_get_channel_name(av_channel_layout_extract_channel(insamples->channel_layout, c));
|
|
if (!channel_name)
|
|
continue;
|
|
drawtext(s->out, 2, c * (s->h + s->b) + (s->h - 8) / 2, channel_name, 0);
|
|
}
|
|
|
|
if (s->draw_persistent_duration > 0.) {
|
|
calc_persistent_max(s, max, c);
|
|
max_draw = FFMAX(0, calc_max_draw(s, outlink, s->max_persistent[c]) - 1);
|
|
draw_max_line(s, max_draw, c);
|
|
}
|
|
}
|
|
}
|
|
|
|
av_frame_free(&insamples);
|
|
out = av_frame_clone(s->out);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
av_frame_make_writable(out);
|
|
|
|
/* draw volume level */
|
|
for (c = 0; c < inlink->channels && s->h >= 8 && s->draw_volume; c++) {
|
|
char buf[16];
|
|
|
|
if (s->orientation) { /* vertical */
|
|
snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]);
|
|
drawtext(out, c * (s->h + s->b) + (s->h - 8) / 2, 2, buf, 1);
|
|
} else { /* horizontal */
|
|
snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]);
|
|
drawtext(out, FFMAX(0, s->w - 8 * (int)strlen(buf)), c * (s->h + s->b) + (s->h - 8) / 2, buf, 0);
|
|
}
|
|
}
|
|
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
static int activate(AVFilterContext *ctx)
|
|
{
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
ShowVolumeContext *s = ctx->priv;
|
|
AVFrame *in = NULL;
|
|
int ret;
|
|
|
|
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
|
|
|
|
ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret > 0)
|
|
return filter_frame(inlink, in);
|
|
|
|
FF_FILTER_FORWARD_STATUS(inlink, outlink);
|
|
FF_FILTER_FORWARD_WANTED(outlink, inlink);
|
|
|
|
return FFERROR_NOT_READY;
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
ShowVolumeContext *s = ctx->priv;
|
|
|
|
av_frame_free(&s->out);
|
|
av_expr_free(s->c_expr);
|
|
av_freep(&s->values);
|
|
av_freep(&s->color_lut);
|
|
av_freep(&s->max);
|
|
}
|
|
|
|
static const AVFilterPad showvolume_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.config_props = config_input,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad showvolume_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_avf_showvolume = {
|
|
.name = "showvolume",
|
|
.description = NULL_IF_CONFIG_SMALL("Convert input audio volume to video output."),
|
|
.init = init,
|
|
.activate = activate,
|
|
.uninit = uninit,
|
|
.priv_size = sizeof(ShowVolumeContext),
|
|
FILTER_INPUTS(showvolume_inputs),
|
|
FILTER_OUTPUTS(showvolume_outputs),
|
|
FILTER_QUERY_FUNC(query_formats),
|
|
.priv_class = &showvolume_class,
|
|
};
|