| /* |
| * Copyright (c) 2016 The FFmpeg Project |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/channel_layout.h" |
| #include "libavutil/opt.h" |
| #include "avfilter.h" |
| #include "audio.h" |
| #include "formats.h" |
| |
| typedef struct CrystalizerContext { |
| const AVClass *class; |
| float mult; |
| int clip; |
| AVFrame *prev; |
| int (*filter)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs); |
| } CrystalizerContext; |
| |
| #define OFFSET(x) offsetof(CrystalizerContext, x) |
| #define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
| |
| static const AVOption crystalizer_options[] = { |
| { "i", "set intensity", OFFSET(mult), AV_OPT_TYPE_FLOAT, {.dbl=2.0}, 0, 10, A }, |
| { "c", "enable clipping", OFFSET(clip), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, A }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(crystalizer); |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| AVFilterFormats *formats = NULL; |
| AVFilterChannelLayouts *layouts = NULL; |
| static const enum AVSampleFormat sample_fmts[] = { |
| AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP, |
| AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP, |
| AV_SAMPLE_FMT_NONE |
| }; |
| int ret; |
| |
| formats = ff_make_format_list(sample_fmts); |
| if (!formats) |
| return AVERROR(ENOMEM); |
| ret = ff_set_common_formats(ctx, formats); |
| if (ret < 0) |
| return ret; |
| |
| layouts = ff_all_channel_counts(); |
| if (!layouts) |
| return AVERROR(ENOMEM); |
| |
| ret = ff_set_common_channel_layouts(ctx, layouts); |
| if (ret < 0) |
| return ret; |
| |
| formats = ff_all_samplerates(); |
| return ff_set_common_samplerates(ctx, formats); |
| } |
| |
| typedef struct ThreadData { |
| void **d; |
| void **p; |
| const void **s; |
| int nb_samples; |
| int channels; |
| float mult; |
| int clip; |
| } ThreadData; |
| |
| static int filter_flt(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| ThreadData *td = arg; |
| void **d = td->d; |
| void **p = td->p; |
| const void **s = td->s; |
| const int nb_samples = td->nb_samples; |
| const int channels = td->channels; |
| float mult = td->mult; |
| const int clip = td->clip; |
| const int start = (channels * jobnr) / nb_jobs; |
| const int end = (channels * (jobnr+1)) / nb_jobs; |
| float *prv = p[0]; |
| int n, c; |
| |
| for (c = start; c < end; c++) { |
| const float *src = s[0]; |
| float *dst = d[0]; |
| |
| for (n = 0; n < nb_samples; n++) { |
| float current = src[c]; |
| dst[c] = current + (current - prv[c]) * mult; |
| prv[c] = current; |
| if (clip) { |
| dst[c] = av_clipf(dst[c], -1, 1); |
| } |
| |
| dst += channels; |
| src += channels; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int filter_dbl(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| ThreadData *td = arg; |
| void **d = td->d; |
| void **p = td->p; |
| const void **s = td->s; |
| const int nb_samples = td->nb_samples; |
| const int channels = td->channels; |
| float mult = td->mult; |
| const int clip = td->clip; |
| const int start = (channels * jobnr) / nb_jobs; |
| const int end = (channels * (jobnr+1)) / nb_jobs; |
| double *prv = p[0]; |
| int n, c; |
| |
| for (c = start; c < end; c++) { |
| const double *src = s[0]; |
| double *dst = d[0]; |
| |
| for (n = 0; n < nb_samples; n++) { |
| double current = src[c]; |
| |
| dst[c] = current + (current - prv[c]) * mult; |
| prv[c] = current; |
| if (clip) { |
| dst[c] = av_clipd(dst[c], -1, 1); |
| } |
| |
| dst += channels; |
| src += channels; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int filter_fltp(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| ThreadData *td = arg; |
| void **d = td->d; |
| void **p = td->p; |
| const void **s = td->s; |
| const int nb_samples = td->nb_samples; |
| const int channels = td->channels; |
| float mult = td->mult; |
| const int clip = td->clip; |
| const int start = (channels * jobnr) / nb_jobs; |
| const int end = (channels * (jobnr+1)) / nb_jobs; |
| int n, c; |
| |
| for (c = start; c < end; c++) { |
| const float *src = s[c]; |
| float *dst = d[c]; |
| float *prv = p[c]; |
| |
| for (n = 0; n < nb_samples; n++) { |
| float current = src[n]; |
| |
| dst[n] = current + (current - prv[0]) * mult; |
| prv[0] = current; |
| if (clip) { |
| dst[n] = av_clipf(dst[n], -1, 1); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int filter_dblp(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| ThreadData *td = arg; |
| void **d = td->d; |
| void **p = td->p; |
| const void **s = td->s; |
| const int nb_samples = td->nb_samples; |
| const int channels = td->channels; |
| float mult = td->mult; |
| const int clip = td->clip; |
| const int start = (channels * jobnr) / nb_jobs; |
| const int end = (channels * (jobnr+1)) / nb_jobs; |
| int n, c; |
| |
| for (c = start; c < end; c++) { |
| const double *src = s[c]; |
| double *dst = d[c]; |
| double *prv = p[c]; |
| |
| for (n = 0; n < nb_samples; n++) { |
| double current = src[n]; |
| |
| dst[n] = current + (current - prv[0]) * mult; |
| prv[0] = current; |
| if (clip) { |
| dst[n] = av_clipd(dst[n], -1, 1); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int config_input(AVFilterLink *inlink) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| CrystalizerContext *s = ctx->priv; |
| |
| switch (inlink->format) { |
| case AV_SAMPLE_FMT_FLT: s->filter = filter_flt; break; |
| case AV_SAMPLE_FMT_DBL: s->filter = filter_dbl; break; |
| case AV_SAMPLE_FMT_FLTP: s->filter = filter_fltp; break; |
| case AV_SAMPLE_FMT_DBLP: s->filter = filter_dblp; break; |
| } |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| CrystalizerContext *s = ctx->priv; |
| AVFrame *out; |
| ThreadData td; |
| |
| if (!s->prev) { |
| s->prev = ff_get_audio_buffer(inlink, 1); |
| if (!s->prev) { |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| } |
| |
| if (av_frame_is_writable(in)) { |
| out = in; |
| } else { |
| out = ff_get_audio_buffer(outlink, in->nb_samples); |
| if (!out) { |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| av_frame_copy_props(out, in); |
| } |
| |
| td.d = (void **)out->extended_data; |
| td.s = (const void **)in->extended_data; |
| td.p = (void **)s->prev->extended_data; |
| td.nb_samples = in->nb_samples; |
| td.channels = in->channels; |
| td.mult = ctx->is_disabled ? 0.f : s->mult; |
| td.clip = s->clip; |
| ctx->internal->execute(ctx, s->filter, &td, NULL, FFMIN(inlink->channels, |
| ff_filter_get_nb_threads(ctx))); |
| |
| if (out != in) |
| av_frame_free(&in); |
| |
| return ff_filter_frame(outlink, out); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| CrystalizerContext *s = ctx->priv; |
| |
| av_frame_free(&s->prev); |
| } |
| |
| static const AVFilterPad inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .filter_frame = filter_frame, |
| .config_props = config_input, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_af_crystalizer = { |
| .name = "crystalizer", |
| .description = NULL_IF_CONFIG_SMALL("Simple expand audio dynamic range filter."), |
| .query_formats = query_formats, |
| .priv_size = sizeof(CrystalizerContext), |
| .priv_class = &crystalizer_class, |
| .uninit = uninit, |
| .inputs = inputs, |
| .outputs = outputs, |
| .process_command = ff_filter_process_command, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | |
| AVFILTER_FLAG_SLICE_THREADS, |
| }; |