mirror of
https://github.com/FFmpeg/FFmpeg.git
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217 lines
9.3 KiB
C
217 lines
9.3 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 "filters.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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int64_t first_pts;
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int nb_samples;
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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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#define AT AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_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, AT },
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{ "pitch", "set pitch scale factor", OFFSET(pitch), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.01, 100, AT },
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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 filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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RubberBandContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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AVFrame *out;
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int ret = 0, nb_samples;
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if (s->first_pts == AV_NOPTS_VALUE)
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s->first_pts = in->pts;
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rubberband_process(s->rbs, (const float *const *)in->data, in->nb_samples, ff_outlink_get_status(inlink));
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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(outlink, 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 = s->first_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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if (ff_inlink_queued_samples(inlink) >= s->nb_samples)
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ff_filter_set_ready(ctx, 100);
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return ret < 0 ? ret : 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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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->ch_layout.nb_channels, opts, 1. / s->tempo, s->pitch);
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if (!s->rbs)
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return AVERROR(ENOMEM);
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s->nb_samples = rubberband_get_samples_required(s->rbs);
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s->first_pts = AV_NOPTS_VALUE;
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return 0;
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}
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static int activate(AVFilterContext *ctx)
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{
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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RubberBandContext *s = ctx->priv;
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AVFrame *in = NULL;
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int ret;
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FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
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ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
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if (ret < 0)
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return ret;
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if (ret > 0) {
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ret = filter_frame(inlink, in);
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if (ret != 0)
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return ret;
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}
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FF_FILTER_FORWARD_STATUS(inlink, outlink);
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FF_FILTER_FORWARD_WANTED(outlink, inlink);
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return FFERROR_NOT_READY;
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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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int ret;
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ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
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if (ret < 0)
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return ret;
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rubberband_set_time_ratio(s->rbs, 1. / s->tempo);
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rubberband_set_pitch_scale(s->rbs, s->pitch);
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s->nb_samples = rubberband_get_samples_required(s->rbs);
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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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},
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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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},
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};
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const 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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.priv_size = sizeof(RubberBandContext),
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.priv_class = &rubberband_class,
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.uninit = uninit,
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.activate = activate,
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FILTER_INPUTS(rubberband_inputs),
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FILTER_OUTPUTS(rubberband_outputs),
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FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_FLTP),
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.process_command = process_command,
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};
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