libavfilter/af_crystalizer.c - manifest_repos/ffmpeg - Git at Google

 /*
  * 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,
 };
	/*
	* 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,
	};