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/* |
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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/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/mem.h" |
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#include "libavutil/opt.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 "video.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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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); |
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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, .unit = "orientation" }, |
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{ "h", "horizontal", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "orientation" }, |
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{ "v", "vertical", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "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, .unit = "mode" }, |
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{ "p", "peak", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "mode" }, |
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{ "r", "rms", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "mode" }, |
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{ "ds", "set display scale", OFFSET(display_scale), AV_OPT_TYPE_INT, {.i64=LINEAR}, LINEAR, NB_DISPLAY_SCALE - 1, FLAGS, .unit = "display_scale" }, |
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{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, .unit = "display_scale" }, |
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{ "log", "log", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, .unit = "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) |
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{ |
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float max = 0.f; |
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max = 0; |
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for (int i = 0; i < nb_samples; i++) |
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max = fmaxf(max, fabsf(src[i])); |
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*peak = max; |
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} |
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static void find_rms(float *src, int nb_samples, float *rms) |
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{ |
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float sum = 0.f; |
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for (int i = 0; i < nb_samples; i++) |
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sum += src[i] * src[i]; |
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*rms = sqrtf(sum / nb_samples); |
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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->ch_layout.nb_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->ch_layout.nb_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->ch_layout.nb_channels, sizeof(*s->max)); |
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if (!s->max) |
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return AVERROR(ENOMEM); |
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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->ch_layout.nb_channels * s->persistent_max_frames, sizeof(*s->max_persistent)); |
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s->nb_frames_max_display = av_calloc(inlink->ch_layout.nb_channels * s->persistent_max_frames, sizeof(*s->nb_frames_max_display)); |
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if (!s->max_persistent || |
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!s->nb_frames_max_display) |
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return AVERROR(ENOMEM); |
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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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FilterLink *l = ff_filter_link(outlink); |
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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->ch_layout.nb_channels + (inlink->ch_layout.nb_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->ch_layout.nb_channels + (inlink->ch_layout.nb_channels - 1) * s->b; |
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} |
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outlink->sample_aspect_ratio = (AVRational){1,1}; |
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l->frame_rate = s->frame_rate; |
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outlink->time_base = av_inv_q(l->frame_rate); |
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for (ch = 0; ch < inlink->ch_layout.nb_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); |
274 |
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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; |
280 |
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if (s->display_scale == LINEAR) { |
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max_val = max; |
282 |
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} else { /* log */ |
283 |
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max_val = av_clipf(0.21 * log10(max) + 1, 0, 1); |
284 |
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} |
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if (s->orientation) { /* vertical */ |
286 |
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return outlink->h - outlink->h * max_val; |
287 |
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} else { /* horizontal */ |
288 |
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return s->w * max_val; |
289 |
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} |
290 |
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} |
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static inline void calc_persistent_max(ShowVolumeContext *s, float max, int channel) |
293 |
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{ |
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/* update max value for persistent max display */ |
295 |
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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 */ |
296 |
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s->max_persistent[channel] = max; |
297 |
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s->nb_frames_max_display[channel] = 0; |
298 |
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} else { |
299 |
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s->nb_frames_max_display[channel] += 1; /* incremente display frame count */ |
300 |
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} |
301 |
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} |
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static inline void draw_max_line(ShowVolumeContext *s, int max_draw, int channel) |
304 |
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{ |
305 |
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int k; |
306 |
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✗ |
if (s->orientation) { /* vertical */ |
307 |
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uint8_t *dst = s->out->data[0] + max_draw * s->out->linesize[0] + channel * (s->b + s->h) * 4; |
308 |
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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)); |
310 |
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} |
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|
} else { /* horizontal */ |
312 |
|
✗ |
for (k = 0; k < s->h; k++) { |
313 |
|
✗ |
uint8_t *dst = s->out->data[0] + (channel * s->h + channel * s->b + k) * s->out->linesize[0]; |
314 |
|
✗ |
memcpy(dst + max_draw * 4, s->persistant_max_rgba, sizeof(s->persistant_max_rgba)); |
315 |
|
|
} |
316 |
|
|
} |
317 |
|
✗ |
} |
318 |
|
|
|
319 |
|
✗ |
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples) |
320 |
|
|
{ |
321 |
|
✗ |
AVFilterContext *ctx = inlink->dst; |
322 |
|
✗ |
AVFilterLink *outlink = ctx->outputs[0]; |
323 |
|
✗ |
ShowVolumeContext *s = ctx->priv; |
324 |
|
✗ |
const int step = s->step; |
325 |
|
|
int c, j, k, max_draw, ret; |
326 |
|
|
char channel_name[64]; |
327 |
|
|
AVFrame *out; |
328 |
|
|
|
329 |
|
✗ |
if (!s->out || s->out->width != outlink->w || |
330 |
|
✗ |
s->out->height != outlink->h) { |
331 |
|
✗ |
av_frame_free(&s->out); |
332 |
|
✗ |
s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
333 |
|
✗ |
if (!s->out) { |
334 |
|
✗ |
av_frame_free(&insamples); |
335 |
|
✗ |
return AVERROR(ENOMEM); |
336 |
|
|
} |
337 |
|
✗ |
clear_picture(s, outlink); |
338 |
|
|
} |
339 |
|
✗ |
s->out->pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base); |
340 |
|
✗ |
s->out->duration = 1; |
341 |
|
|
|
342 |
|
✗ |
if ((s->f < 1.) && (s->f > 0.)) { |
343 |
|
✗ |
for (j = 0; j < outlink->h; j++) { |
344 |
|
✗ |
uint8_t *dst = s->out->data[0] + j * s->out->linesize[0]; |
345 |
|
✗ |
const uint32_t alpha = s->bgopacity * 255; |
346 |
|
|
|
347 |
|
✗ |
for (k = 0; k < outlink->w; k++) { |
348 |
|
✗ |
dst[k * 4 + 0] = FFMAX(dst[k * 4 + 0] * s->f, 0); |
349 |
|
✗ |
dst[k * 4 + 1] = FFMAX(dst[k * 4 + 1] * s->f, 0); |
350 |
|
✗ |
dst[k * 4 + 2] = FFMAX(dst[k * 4 + 2] * s->f, 0); |
351 |
|
✗ |
dst[k * 4 + 3] = FFMAX(dst[k * 4 + 3] * s->f, alpha); |
352 |
|
|
} |
353 |
|
|
} |
354 |
|
✗ |
} else if (s->f == 0.) { |
355 |
|
✗ |
clear_picture(s, outlink); |
356 |
|
|
} |
357 |
|
|
|
358 |
|
✗ |
if (s->orientation) { /* vertical */ |
359 |
|
✗ |
for (c = 0; c < inlink->ch_layout.nb_channels; c++) { |
360 |
|
✗ |
float *src = (float *)insamples->extended_data[c]; |
361 |
|
✗ |
uint32_t *lut = s->color_lut + s->w * c; |
362 |
|
|
float max; |
363 |
|
|
|
364 |
|
✗ |
s->meter(src, insamples->nb_samples, &s->max[c]); |
365 |
|
✗ |
max = s->max[c]; |
366 |
|
|
|
367 |
|
✗ |
s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max); |
368 |
|
✗ |
max = av_clipf(max, 0, 1); |
369 |
|
✗ |
max_draw = calc_max_draw(s, outlink, max); |
370 |
|
|
|
371 |
|
✗ |
for (j = s->w - 1; j >= max_draw; j--) { |
372 |
|
✗ |
uint8_t *dst = s->out->data[0] + j * s->out->linesize[0] + c * (s->b + s->h) * 4; |
373 |
|
✗ |
for (k = 0; k < s->h; k++) { |
374 |
|
✗ |
AV_WN32A(&dst[k * 4], lut[s->w - j - 1]); |
375 |
|
|
} |
376 |
|
✗ |
if (j & step) |
377 |
|
✗ |
j -= step; |
378 |
|
|
} |
379 |
|
|
|
380 |
|
✗ |
if (s->draw_persistent_duration > 0.) { |
381 |
|
✗ |
calc_persistent_max(s, max, c); |
382 |
|
✗ |
max_draw = FFMAX(0, calc_max_draw(s, outlink, s->max_persistent[c]) - 1); |
383 |
|
✗ |
draw_max_line(s, max_draw, c); |
384 |
|
|
} |
385 |
|
|
} |
386 |
|
|
} else { /* horizontal */ |
387 |
|
✗ |
for (c = 0; c < inlink->ch_layout.nb_channels; c++) { |
388 |
|
✗ |
float *src = (float *)insamples->extended_data[c]; |
389 |
|
✗ |
uint32_t *lut = s->color_lut + s->w * c; |
390 |
|
|
float max; |
391 |
|
|
|
392 |
|
✗ |
s->meter(src, insamples->nb_samples, &s->max[c]); |
393 |
|
✗ |
max = s->max[c]; |
394 |
|
|
|
395 |
|
✗ |
s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max); |
396 |
|
✗ |
max = av_clipf(max, 0, 1); |
397 |
|
✗ |
max_draw = calc_max_draw(s, outlink, max); |
398 |
|
|
|
399 |
|
✗ |
for (j = 0; j < s->h; j++) { |
400 |
|
✗ |
uint8_t *dst = s->out->data[0] + (c * s->h + c * s->b + j) * s->out->linesize[0]; |
401 |
|
|
|
402 |
|
✗ |
for (k = 0; k < max_draw; k++) { |
403 |
|
✗ |
AV_WN32A(dst + k * 4, lut[k]); |
404 |
|
✗ |
if (k & step) |
405 |
|
✗ |
k += step; |
406 |
|
|
} |
407 |
|
|
} |
408 |
|
|
|
409 |
|
✗ |
if (s->draw_persistent_duration > 0.) { |
410 |
|
✗ |
calc_persistent_max(s, max, c); |
411 |
|
✗ |
max_draw = FFMAX(0, calc_max_draw(s, outlink, s->max_persistent[c]) - 1); |
412 |
|
✗ |
draw_max_line(s, max_draw, c); |
413 |
|
|
} |
414 |
|
|
} |
415 |
|
|
} |
416 |
|
|
|
417 |
|
✗ |
av_frame_free(&insamples); |
418 |
|
✗ |
out = av_frame_clone(s->out); |
419 |
|
✗ |
if (!out) |
420 |
|
✗ |
return AVERROR(ENOMEM); |
421 |
|
✗ |
ret = ff_inlink_make_frame_writable(outlink, &out); |
422 |
|
✗ |
if (ret < 0) { |
423 |
|
✗ |
av_frame_free(&out); |
424 |
|
✗ |
return ret; |
425 |
|
|
} |
426 |
|
|
|
427 |
|
|
/* draw channel names */ |
428 |
|
✗ |
for (c = 0; c < inlink->ch_layout.nb_channels && s->h >= 10 && s->draw_text; c++) { |
429 |
|
✗ |
if (s->orientation) { /* vertical */ |
430 |
|
✗ |
int ret = av_channel_name(channel_name, sizeof(channel_name), av_channel_layout_channel_from_index(&inlink->ch_layout, c)); |
431 |
|
✗ |
if (ret < 0) |
432 |
|
✗ |
continue; |
433 |
|
✗ |
drawtext(out, c * (s->h + s->b) + (s->h - 10) / 2, outlink->h - 35, channel_name, 1); |
434 |
|
|
} else { /* horizontal */ |
435 |
|
✗ |
int ret = av_channel_name(channel_name, sizeof(channel_name), av_channel_layout_channel_from_index(&inlink->ch_layout, c)); |
436 |
|
✗ |
if (ret < 0) |
437 |
|
✗ |
continue; |
438 |
|
✗ |
drawtext(out, 2, c * (s->h + s->b) + (s->h - 8) / 2, channel_name, 0); |
439 |
|
|
} |
440 |
|
|
} |
441 |
|
|
|
442 |
|
|
/* draw volume level */ |
443 |
|
✗ |
for (c = 0; c < inlink->ch_layout.nb_channels && s->h >= 8 && s->draw_volume; c++) { |
444 |
|
|
char buf[16]; |
445 |
|
|
|
446 |
|
✗ |
if (s->orientation) { /* vertical */ |
447 |
|
✗ |
snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]); |
448 |
|
✗ |
drawtext(out, c * (s->h + s->b) + (s->h - 8) / 2, 2, buf, 1); |
449 |
|
|
} else { /* horizontal */ |
450 |
|
✗ |
snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]); |
451 |
|
✗ |
drawtext(out, FFMAX(0, s->w - 8 * (int)strlen(buf)), c * (s->h + s->b) + (s->h - 8) / 2, buf, 0); |
452 |
|
|
} |
453 |
|
|
} |
454 |
|
|
|
455 |
|
✗ |
return ff_filter_frame(outlink, out); |
456 |
|
|
} |
457 |
|
|
|
458 |
|
✗ |
static int activate(AVFilterContext *ctx) |
459 |
|
|
{ |
460 |
|
✗ |
AVFilterLink *inlink = ctx->inputs[0]; |
461 |
|
✗ |
AVFilterLink *outlink = ctx->outputs[0]; |
462 |
|
✗ |
ShowVolumeContext *s = ctx->priv; |
463 |
|
✗ |
AVFrame *in = NULL; |
464 |
|
|
int ret; |
465 |
|
|
|
466 |
|
✗ |
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink); |
467 |
|
|
|
468 |
|
✗ |
ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in); |
469 |
|
✗ |
if (ret < 0) |
470 |
|
✗ |
return ret; |
471 |
|
✗ |
if (ret > 0) |
472 |
|
✗ |
return filter_frame(inlink, in); |
473 |
|
|
|
474 |
|
✗ |
if (ff_inlink_queued_samples(inlink) >= s->nb_samples) { |
475 |
|
✗ |
ff_filter_set_ready(ctx, 10); |
476 |
|
✗ |
return 0; |
477 |
|
|
} |
478 |
|
|
|
479 |
|
✗ |
FF_FILTER_FORWARD_STATUS(inlink, outlink); |
480 |
|
✗ |
FF_FILTER_FORWARD_WANTED(outlink, inlink); |
481 |
|
|
|
482 |
|
✗ |
return FFERROR_NOT_READY; |
483 |
|
|
} |
484 |
|
|
|
485 |
|
✗ |
static av_cold void uninit(AVFilterContext *ctx) |
486 |
|
|
{ |
487 |
|
✗ |
ShowVolumeContext *s = ctx->priv; |
488 |
|
|
|
489 |
|
✗ |
av_frame_free(&s->out); |
490 |
|
✗ |
av_expr_free(s->c_expr); |
491 |
|
✗ |
av_freep(&s->values); |
492 |
|
✗ |
av_freep(&s->color_lut); |
493 |
|
✗ |
av_freep(&s->max); |
494 |
|
✗ |
av_freep(&s->max_persistent); |
495 |
|
✗ |
av_freep(&s->nb_frames_max_display); |
496 |
|
✗ |
} |
497 |
|
|
|
498 |
|
|
static const AVFilterPad showvolume_inputs[] = { |
499 |
|
|
{ |
500 |
|
|
.name = "default", |
501 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
502 |
|
|
.config_props = config_input, |
503 |
|
|
}, |
504 |
|
|
}; |
505 |
|
|
|
506 |
|
|
static const AVFilterPad showvolume_outputs[] = { |
507 |
|
|
{ |
508 |
|
|
.name = "default", |
509 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
510 |
|
|
.config_props = config_output, |
511 |
|
|
}, |
512 |
|
|
}; |
513 |
|
|
|
514 |
|
|
const AVFilter ff_avf_showvolume = { |
515 |
|
|
.name = "showvolume", |
516 |
|
|
.description = NULL_IF_CONFIG_SMALL("Convert input audio volume to video output."), |
517 |
|
|
.init = init, |
518 |
|
|
.activate = activate, |
519 |
|
|
.uninit = uninit, |
520 |
|
|
.priv_size = sizeof(ShowVolumeContext), |
521 |
|
|
FILTER_INPUTS(showvolume_inputs), |
522 |
|
|
FILTER_OUTPUTS(showvolume_outputs), |
523 |
|
|
FILTER_QUERY_FUNC(query_formats), |
524 |
|
|
.priv_class = &showvolume_class, |
525 |
|
|
}; |
526 |
|
|
|