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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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/** |
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* @file |
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* audio to video multimedia aphasemeter filter |
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*/ |
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#include "libavutil/avassert.h" |
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#include "libavutil/channel_layout.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/timestamp.h" |
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#include "avfilter.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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#include "float.h" |
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typedef struct AudioPhaseMeterContext { |
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const AVClass *class; |
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AVFrame *out; |
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int do_video; |
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int do_phasing_detection; |
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int w, h; |
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AVRational frame_rate; |
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int contrast[4]; |
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uint8_t *mpc_str; |
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uint8_t mpc[4]; |
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int draw_median_phase; |
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int is_mono; |
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int is_out_phase; |
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int start_mono_presence; |
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int start_out_phase_presence; |
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float tolerance; |
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float angle; |
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float phase; |
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AVRational time_base; |
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int64_t duration; |
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int64_t frame_end; |
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int64_t mono_idx[2]; |
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int64_t out_phase_idx[2]; |
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} AudioPhaseMeterContext; |
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#define MAX_DURATION (24*60*60*1000000LL) |
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#define OFFSET(x) offsetof(AudioPhaseMeterContext, x) |
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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#define get_duration(index) (index[1] - index[0]) |
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static const AVOption aphasemeter_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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{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS }, |
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{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS }, |
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{ "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=2}, 0, 255, FLAGS }, |
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{ "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=7}, 0, 255, FLAGS }, |
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{ "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=1}, 0, 255, FLAGS }, |
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{ "mpc", "set median phase color", OFFSET(mpc_str), AV_OPT_TYPE_STRING, {.str = "none"}, 0, 0, FLAGS }, |
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{ "video", "set video output", OFFSET(do_video), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS }, |
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{ "phasing", "set mono and out-of-phase detection output", OFFSET(do_phasing_detection), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS }, |
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{ "tolerance", "set phase tolerance for mono detection", OFFSET(tolerance), AV_OPT_TYPE_FLOAT, {.dbl = 0.}, 0, 1, FLAGS }, |
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{ "t", "set phase tolerance for mono detection", OFFSET(tolerance), AV_OPT_TYPE_FLOAT, {.dbl = 0.}, 0, 1, FLAGS }, |
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{ "angle", "set angle threshold for out-of-phase detection", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl = 170.}, 90, 180, FLAGS }, |
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{ "a", "set angle threshold for out-of-phase detection", OFFSET(angle), AV_OPT_TYPE_FLOAT, {.dbl = 170.}, 90, 180, FLAGS }, |
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{ "duration", "set minimum mono or out-of-phase duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, MAX_DURATION, FLAGS }, |
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{ "d", "set minimum mono or out-of-phase duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, MAX_DURATION, FLAGS }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(aphasemeter); |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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AudioPhaseMeterContext *s = ctx->priv; |
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AVFilterFormats *formats = NULL; |
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AVFilterChannelLayouts *layout = 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_FLT, 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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✓✗✓✗
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if ((ret = ff_formats_ref (formats, &inlink->outcfg.formats )) < 0 || |
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✓✗ |
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(ret = ff_formats_ref (formats, &outlink->incfg.formats )) < 0 || |
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✓✗ |
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(ret = ff_add_channel_layout (&layout, AV_CH_LAYOUT_STEREO )) < 0 || |
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✗✓ |
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(ret = ff_channel_layouts_ref (layout , &inlink->outcfg.channel_layouts)) < 0 || |
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(ret = ff_channel_layouts_ref (layout , &outlink->incfg.channel_layouts)) < 0) |
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return ret; |
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formats = ff_all_samplerates(); |
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✓✗✗✓
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if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0 || |
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(ret = ff_formats_ref(formats, &outlink->incfg.samplerates)) < 0) |
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return ret; |
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✗✓ |
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if (s->do_video) { |
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AVFilterLink *outlink = ctx->outputs[1]; |
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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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} |
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return 0; |
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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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AudioPhaseMeterContext *s = ctx->priv; |
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int nb_samples; |
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s->duration = av_rescale(s->duration, inlink->sample_rate, AV_TIME_BASE); |
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✗✓ |
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if (s->do_video) { |
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nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num)); |
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inlink->partial_buf_size = |
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inlink->min_samples = |
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inlink->max_samples = nb_samples; |
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} |
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return 0; |
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} |
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static int config_video_output(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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AudioPhaseMeterContext *s = ctx->priv; |
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outlink->w = s->w; |
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outlink->h = s->h; |
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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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if (!strcmp(s->mpc_str, "none")) |
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s->draw_median_phase = 0; |
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else if (av_parse_color(s->mpc, s->mpc_str, -1, ctx) >= 0) |
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s->draw_median_phase = 1; |
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else |
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return AVERROR(EINVAL); |
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return 0; |
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} |
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static inline int get_x(float phase, int w) |
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{ |
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return (phase + 1.) / 2. * (w - 1); |
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} |
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static inline void add_metadata(AVFrame *insamples, const char *key, char *value) |
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{ |
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char buf[128]; |
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snprintf(buf, sizeof(buf), "lavfi.aphasemeter.%s", key); |
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av_dict_set(&insamples->metadata, buf, value, 0); |
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} |
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static inline void update_mono_detection(AudioPhaseMeterContext *s, AVFrame *insamples, int mono_measurement) |
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{ |
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int64_t mono_duration; |
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if (!s->is_mono && mono_measurement) { |
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s->is_mono = 1; |
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s->start_mono_presence = 1; |
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s->mono_idx[0] = insamples->pts; |
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} |
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if (s->is_mono && mono_measurement && s->start_mono_presence) { |
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s->mono_idx[1] = s->frame_end; |
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mono_duration = get_duration(s->mono_idx); |
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if (mono_duration >= s->duration) { |
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add_metadata(insamples, "mono_start", av_ts2timestr(s->mono_idx[0], &s->time_base)); |
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av_log(s, AV_LOG_INFO, "mono_start: %s\n", av_ts2timestr(s->mono_idx[0], &s->time_base)); |
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s->start_mono_presence = 0; |
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} |
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} |
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if (s->is_mono && !mono_measurement) { |
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s->mono_idx[1] = insamples ? insamples->pts : s->frame_end; |
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mono_duration = get_duration(s->mono_idx); |
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if (mono_duration >= s->duration) { |
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if (insamples) { |
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add_metadata(insamples, "mono_end", av_ts2timestr(s->mono_idx[1], &s->time_base)); |
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add_metadata(insamples, "mono_duration", av_ts2timestr(mono_duration, &s->time_base)); |
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} |
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av_log(s, AV_LOG_INFO, "mono_end: %s | mono_duration: %s\n", av_ts2timestr(s->mono_idx[1], &s->time_base), av_ts2timestr(mono_duration, &s->time_base)); |
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} |
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s->is_mono = 0; |
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} |
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} |
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static inline void update_out_phase_detection(AudioPhaseMeterContext *s, AVFrame *insamples, int out_phase_measurement) |
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{ |
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int64_t out_phase_duration; |
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if (!s->is_out_phase && out_phase_measurement) { |
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s->is_out_phase = 1; |
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s->start_out_phase_presence = 1; |
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s->out_phase_idx[0] = insamples->pts; |
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} |
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if (s->is_out_phase && out_phase_measurement && s->start_out_phase_presence) { |
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s->out_phase_idx[1] = s->frame_end; |
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out_phase_duration = get_duration(s->out_phase_idx); |
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if (out_phase_duration >= s->duration) { |
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add_metadata(insamples, "out_phase_start", av_ts2timestr(s->out_phase_idx[0], &s->time_base)); |
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av_log(s, AV_LOG_INFO, "out_phase_start: %s\n", av_ts2timestr(s->out_phase_idx[0], &s->time_base)); |
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s->start_out_phase_presence = 0; |
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} |
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} |
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if (s->is_out_phase && !out_phase_measurement) { |
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s->out_phase_idx[1] = insamples ? insamples->pts : s->frame_end; |
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out_phase_duration = get_duration(s->out_phase_idx); |
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if (out_phase_duration >= s->duration) { |
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if (insamples) { |
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add_metadata(insamples, "out_phase_end", av_ts2timestr(s->out_phase_idx[1], &s->time_base)); |
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add_metadata(insamples, "out_phase_duration", av_ts2timestr(out_phase_duration, &s->time_base)); |
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} |
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av_log(s, AV_LOG_INFO, "out_phase_end: %s | out_phase_duration: %s\n", av_ts2timestr(s->out_phase_idx[1], &s->time_base), av_ts2timestr(out_phase_duration, &s->time_base)); |
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} |
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s->is_out_phase = 0; |
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} |
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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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AudioPhaseMeterContext *s = ctx->priv; |
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✗✓ |
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AVFilterLink *outlink = s->do_video ? ctx->outputs[1] : NULL; |
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AVFilterLink *aoutlink = ctx->outputs[0]; |
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AVDictionary **metadata; |
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const int rc = s->contrast[0]; |
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const int gc = s->contrast[1]; |
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const int bc = s->contrast[2]; |
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float fphase = 0; |
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AVFrame *out; |
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uint8_t *dst; |
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int i; |
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int mono_measurement; |
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int out_phase_measurement; |
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float tolerance = 1.0f - s->tolerance; |
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float angle = cosf(s->angle/180.0f*M_PI); |
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✗✓✗✗ ✗✗ |
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if (s->do_video && (!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(&in); |
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return AVERROR(ENOMEM); |
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} |
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out = s->out; |
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for (i = 0; i < outlink->h; i++) |
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memset(out->data[0] + i * out->linesize[0], 0, outlink->w * 4); |
269 |
✗✓ |
58 |
} else if (s->do_video) { |
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out = s->out; |
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for (i = outlink->h - 1; i >= 10; i--) |
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memmove(out->data[0] + (i ) * out->linesize[0], |
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out->data[0] + (i-1) * out->linesize[0], |
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outlink->w * 4); |
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for (i = 0; i < outlink->w; i++) |
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AV_WL32(out->data[0] + i * 4, 0); |
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} |
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279 |
✓✓ |
96058 |
for (i = 0; i < in->nb_samples; i++) { |
280 |
|
96000 |
const float *src = (float *)in->data[0] + i * 2; |
281 |
|
96000 |
const float f = src[0] * src[1] / (src[0]*src[0] + src[1] * src[1]) * 2; |
282 |
✓✓ |
96000 |
const float phase = isnan(f) ? 1 : f; |
283 |
|
96000 |
const int x = get_x(phase, s->w); |
284 |
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|
285 |
✗✓ |
96000 |
if (s->do_video) { |
286 |
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dst = out->data[0] + x * 4; |
287 |
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dst[0] = FFMIN(255, dst[0] + rc); |
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dst[1] = FFMIN(255, dst[1] + gc); |
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dst[2] = FFMIN(255, dst[2] + bc); |
290 |
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dst[3] = 255; |
291 |
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} |
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|
96000 |
fphase += phase; |
293 |
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} |
294 |
|
58 |
fphase /= in->nb_samples; |
295 |
|
58 |
s->phase = fphase; |
296 |
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|
297 |
✗✓ |
58 |
if (s->do_video) { |
298 |
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if (s->draw_median_phase) { |
299 |
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dst = out->data[0] + get_x(fphase, s->w) * 4; |
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AV_WL32(dst, AV_RL32(s->mpc)); |
301 |
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} |
302 |
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for (i = 1; i < 10 && i < outlink->h; i++) |
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memcpy(out->data[0] + i * out->linesize[0], out->data[0], outlink->w * 4); |
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} |
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58 |
metadata = &in->metadata; |
308 |
✓✗ |
58 |
if (metadata) { |
309 |
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uint8_t value[128]; |
310 |
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311 |
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58 |
snprintf(value, sizeof(value), "%f", fphase); |
312 |
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add_metadata(in, "phase", value); |
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} |
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|
315 |
✗✓ |
58 |
if (s->do_phasing_detection) { |
316 |
|
|
s->time_base = inlink->time_base; |
317 |
|
|
s->frame_end = in->pts + av_rescale_q(in->nb_samples, |
318 |
|
|
(AVRational){ 1, in->sample_rate }, inlink->time_base); |
319 |
|
|
|
320 |
|
|
mono_measurement = (tolerance - fphase) < FLT_EPSILON; |
321 |
|
|
out_phase_measurement = (angle - fphase) > FLT_EPSILON; |
322 |
|
|
|
323 |
|
|
update_mono_detection(s, in, mono_measurement); |
324 |
|
|
update_out_phase_detection(s, in, out_phase_measurement); |
325 |
|
|
} |
326 |
|
|
|
327 |
✗✓ |
58 |
if (s->do_video) { |
328 |
|
|
AVFrame *clone; |
329 |
|
|
|
330 |
|
|
s->out->pts = in->pts; |
331 |
|
|
clone = av_frame_clone(s->out); |
332 |
|
|
if (!clone) |
333 |
|
|
return AVERROR(ENOMEM); |
334 |
|
|
ff_filter_frame(outlink, clone); |
335 |
|
|
} |
336 |
|
58 |
return ff_filter_frame(aoutlink, in); |
337 |
|
|
} |
338 |
|
|
|
339 |
|
2 |
static av_cold void uninit(AVFilterContext *ctx) |
340 |
|
|
{ |
341 |
|
2 |
AudioPhaseMeterContext *s = ctx->priv; |
342 |
|
|
|
343 |
✗✓ |
2 |
if (s->do_phasing_detection) { |
344 |
|
|
update_mono_detection(s, NULL, 0); |
345 |
|
|
update_out_phase_detection(s, NULL, 0); |
346 |
|
|
} |
347 |
|
2 |
av_frame_free(&s->out); |
348 |
|
2 |
} |
349 |
|
|
|
350 |
|
2 |
static av_cold int init(AVFilterContext *ctx) |
351 |
|
|
{ |
352 |
|
2 |
AudioPhaseMeterContext *s = ctx->priv; |
353 |
|
|
AVFilterPad pad; |
354 |
|
|
int ret; |
355 |
|
|
|
356 |
|
2 |
pad = (AVFilterPad){ |
357 |
|
|
.name = "out0", |
358 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
359 |
|
|
}; |
360 |
|
2 |
ret = ff_insert_outpad(ctx, 0, &pad); |
361 |
✗✓ |
2 |
if (ret < 0) |
362 |
|
|
return ret; |
363 |
|
|
|
364 |
✗✓ |
2 |
if (s->do_video) { |
365 |
|
|
pad = (AVFilterPad){ |
366 |
|
|
.name = "out1", |
367 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
368 |
|
|
.config_props = config_video_output, |
369 |
|
|
}; |
370 |
|
|
ret = ff_insert_outpad(ctx, 1, &pad); |
371 |
|
|
if (ret < 0) |
372 |
|
|
return ret; |
373 |
|
|
} |
374 |
|
|
|
375 |
|
2 |
return 0; |
376 |
|
|
} |
377 |
|
|
|
378 |
|
|
static const AVFilterPad inputs[] = { |
379 |
|
|
{ |
380 |
|
|
.name = "default", |
381 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
382 |
|
|
.config_props = config_input, |
383 |
|
|
.filter_frame = filter_frame, |
384 |
|
|
}, |
385 |
|
|
{ NULL } |
386 |
|
|
}; |
387 |
|
|
|
388 |
|
|
AVFilter ff_avf_aphasemeter = { |
389 |
|
|
.name = "aphasemeter", |
390 |
|
|
.description = NULL_IF_CONFIG_SMALL("Convert input audio to phase meter video output."), |
391 |
|
|
.init = init, |
392 |
|
|
.uninit = uninit, |
393 |
|
|
.query_formats = query_formats, |
394 |
|
|
.priv_size = sizeof(AudioPhaseMeterContext), |
395 |
|
|
.inputs = inputs, |
396 |
|
|
.outputs = NULL, |
397 |
|
|
.priv_class = &aphasemeter_class, |
398 |
|
|
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS, |
399 |
|
|
}; |