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