272 lines
11 KiB
C
272 lines
11 KiB
C
/*
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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 <rubberband/rubberband-c.h>
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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "audio.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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typedef struct RubberBandContext {
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const AVClass *class;
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RubberBandState rbs;
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double tempo, pitch;
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int transients, detector, phase, window,
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smoothing, formant, opitch, channels;
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int64_t nb_samples_out;
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int64_t nb_samples_in;
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int flushed;
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} RubberBandContext;
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#define OFFSET(x) offsetof(RubberBandContext, x)
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#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption rubberband_options[] = {
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{ "tempo", "set tempo scale factor", OFFSET(tempo), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.01, 100, A },
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{ "pitch", "set pitch scale factor", OFFSET(pitch), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.01, 100, A },
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{ "transients", "set transients", OFFSET(transients), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, A, "transients" },
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{ "crisp", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionTransientsCrisp}, 0, 0, A, "transients" },
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{ "mixed", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionTransientsMixed}, 0, 0, A, "transients" },
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{ "smooth", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionTransientsSmooth}, 0, 0, A, "transients" },
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{ "detector", "set detector", OFFSET(detector), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, A, "detector" },
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{ "compound", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionDetectorCompound}, 0, 0, A, "detector" },
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{ "percussive", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionDetectorPercussive}, 0, 0, A, "detector" },
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{ "soft", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionDetectorSoft}, 0, 0, A, "detector" },
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{ "phase", "set phase", OFFSET(phase), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, A, "phase" },
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{ "laminar", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionPhaseLaminar}, 0, 0, A, "phase" },
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{ "independent", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionPhaseIndependent}, 0, 0, A, "phase" },
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{ "window", "set window", OFFSET(window), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, A, "window" },
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{ "standard", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionWindowStandard}, 0, 0, A, "window" },
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{ "short", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionWindowShort}, 0, 0, A, "window" },
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{ "long", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionWindowLong}, 0, 0, A, "window" },
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{ "smoothing", "set smoothing", OFFSET(smoothing), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, A, "smoothing" },
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{ "off", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionSmoothingOff}, 0, 0, A, "smoothing" },
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{ "on", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionSmoothingOn}, 0, 0, A, "smoothing" },
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{ "formant", "set formant", OFFSET(formant), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, A, "formant" },
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{ "shifted", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionFormantShifted}, 0, 0, A, "formant" },
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{ "preserved", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionFormantPreserved}, 0, 0, A, "formant" },
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{ "pitchq", "set pitch quality", OFFSET(opitch), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, A, "pitch" },
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{ "quality", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionPitchHighQuality}, 0, 0, A, "pitch" },
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{ "speed", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionPitchHighSpeed}, 0, 0, A, "pitch" },
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{ "consistency", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionPitchHighConsistency}, 0, 0, A, "pitch" },
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{ "channels", "set channels", OFFSET(channels), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, A, "channels" },
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{ "apart", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionChannelsApart}, 0, 0, A, "channels" },
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{ "together", 0, 0, AV_OPT_TYPE_CONST, {.i64=RubberBandOptionChannelsTogether}, 0, 0, A, "channels" },
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{ NULL },
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};
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AVFILTER_DEFINE_CLASS(rubberband);
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static av_cold void uninit(AVFilterContext *ctx)
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{
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RubberBandContext *s = ctx->priv;
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if (s->rbs)
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rubberband_delete(s->rbs);
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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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static const enum AVSampleFormat sample_fmts[] = {
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AV_SAMPLE_FMT_FLTP,
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AV_SAMPLE_FMT_NONE,
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};
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int ret;
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layouts = ff_all_channel_counts();
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if (!layouts)
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return AVERROR(ENOMEM);
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ret = ff_set_common_channel_layouts(ctx, layouts);
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if (ret < 0)
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return ret;
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formats = ff_make_format_list(sample_fmts);
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if (!formats)
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return AVERROR(ENOMEM);
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ret = ff_set_common_formats(ctx, formats);
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if (ret < 0)
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return ret;
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formats = ff_all_samplerates();
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if (!formats)
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return AVERROR(ENOMEM);
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return ff_set_common_samplerates(ctx, formats);
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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RubberBandContext *s = inlink->dst->priv;
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AVFilterLink *outlink = inlink->dst->outputs[0];
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AVFrame *out;
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int ret = 0, nb_samples;
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rubberband_process(s->rbs, (const float *const *)in->data, in->nb_samples, 0);
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s->nb_samples_in += in->nb_samples;
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nb_samples = rubberband_available(s->rbs);
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if (nb_samples > 0) {
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out = ff_get_audio_buffer(inlink, nb_samples);
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if (!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->pts = av_rescale_q(s->nb_samples_out,
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(AVRational){ 1, outlink->sample_rate },
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outlink->time_base);
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nb_samples = rubberband_retrieve(s->rbs, (float *const *)out->data, nb_samples);
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out->nb_samples = nb_samples;
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ret = ff_filter_frame(outlink, out);
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s->nb_samples_out += nb_samples;
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}
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av_frame_free(&in);
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return ret;
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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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RubberBandContext *s = ctx->priv;
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int opts = s->transients|s->detector|s->phase|s->window|
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s->smoothing|s->formant|s->opitch|s->channels|
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RubberBandOptionProcessRealTime;
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if (s->rbs)
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rubberband_delete(s->rbs);
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s->rbs = rubberband_new(inlink->sample_rate, inlink->channels, opts, 1. / s->tempo, s->pitch);
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inlink->partial_buf_size =
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inlink->min_samples =
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inlink->max_samples = rubberband_get_samples_required(s->rbs);
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return 0;
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}
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static int request_frame(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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RubberBandContext *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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int ret = 0;
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ret = ff_request_frame(ctx->inputs[0]);
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if (ret == AVERROR_EOF && !s->flushed) {
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if (rubberband_available(s->rbs) > 0) {
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AVFrame *out = ff_get_audio_buffer(inlink, 1);
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int nb_samples;
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if (!out)
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return AVERROR(ENOMEM);
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rubberband_process(s->rbs, (const float *const *)out->data, 1, 1);
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av_frame_free(&out);
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nb_samples = rubberband_available(s->rbs);
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if (nb_samples > 0) {
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out = ff_get_audio_buffer(inlink, nb_samples);
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if (!out)
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return AVERROR(ENOMEM);
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out->pts = av_rescale_q(s->nb_samples_out,
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(AVRational){ 1, outlink->sample_rate },
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outlink->time_base);
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nb_samples = rubberband_retrieve(s->rbs, (float *const *)out->data, nb_samples);
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out->nb_samples = nb_samples;
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ret = ff_filter_frame(outlink, out);
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s->nb_samples_out += nb_samples;
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}
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}
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s->flushed = 1;
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av_log(ctx, AV_LOG_DEBUG, "nb_samples_in %"PRId64" nb_samples_out %"PRId64"\n",
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s->nb_samples_in, s->nb_samples_out);
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}
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return ret;
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}
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static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
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char *res, int res_len, int flags)
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{
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RubberBandContext *s = ctx->priv;
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if (!strcmp(cmd, "tempo")) {
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double arg;
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sscanf(args, "%lf", &arg);
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if (arg < 0.01 || arg > 100) {
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av_log(ctx, AV_LOG_ERROR,
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"Tempo scale factor '%f' out of range\n", arg);
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return AVERROR(EINVAL);
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}
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rubberband_set_time_ratio(s->rbs, 1. / arg);
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}
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if (!strcmp(cmd, "pitch")) {
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double arg;
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sscanf(args, "%lf", &arg);
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if (arg < 0.01 || arg > 100) {
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av_log(ctx, AV_LOG_ERROR,
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"Pitch scale factor '%f' out of range\n", arg);
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return AVERROR(EINVAL);
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}
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rubberband_set_pitch_scale(s->rbs, arg);
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}
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return 0;
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}
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static const AVFilterPad rubberband_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.config_props = config_input,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad rubberband_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.request_frame = request_frame,
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},
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{ NULL }
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};
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AVFilter ff_af_rubberband = {
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.name = "rubberband",
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.description = NULL_IF_CONFIG_SMALL("Apply time-stretching and pitch-shifting."),
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.query_formats = query_formats,
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.priv_size = sizeof(RubberBandContext),
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.priv_class = &rubberband_class,
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.uninit = uninit,
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.inputs = rubberband_inputs,
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.outputs = rubberband_outputs,
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.process_command = process_command,
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};
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