2 * Copyright (c) 2018 Paul B Mahol
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/avassert.h"
22 #include "libavutil/channel_layout.h"
23 #include "libavutil/common.h"
24 #include "libavutil/float_dsp.h"
25 #include "libavutil/opt.h"
33 typedef struct AudioMultiplyContext {
42 AVFloatDSPContext *fdsp;
43 } AudioMultiplyContext;
45 static int query_formats(AVFilterContext *ctx)
47 AVFilterFormats *formats;
48 AVFilterChannelLayouts *layouts;
49 static const enum AVSampleFormat sample_fmts[] = {
50 AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP,
51 AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP,
56 layouts = ff_all_channel_counts();
58 return AVERROR(ENOMEM);
59 ret = ff_set_common_channel_layouts(ctx, layouts);
63 formats = ff_make_format_list(sample_fmts);
65 return AVERROR(ENOMEM);
66 ret = ff_set_common_formats(ctx, formats);
70 formats = ff_all_samplerates();
72 return AVERROR(ENOMEM);
73 return ff_set_common_samplerates(ctx, formats);
76 static int activate(AVFilterContext *ctx)
78 AudioMultiplyContext *s = ctx->priv;
83 FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
85 nb_samples = FFMIN(ff_inlink_queued_samples(ctx->inputs[0]),
86 ff_inlink_queued_samples(ctx->inputs[1]));
87 for (i = 0; i < ctx->nb_inputs && nb_samples > 0; i++) {
91 if (ff_inlink_check_available_samples(ctx->inputs[i], nb_samples) > 0) {
92 ret = ff_inlink_consume_samples(ctx->inputs[i], nb_samples, nb_samples, &s->frames[i]);
98 if (nb_samples > 0 && s->frames[0] && s->frames[1]) {
102 if (av_sample_fmt_is_planar(ctx->inputs[0]->format))
103 plane_samples = FFALIGN(nb_samples, s->samples_align);
105 plane_samples = FFALIGN(nb_samples * s->channels, s->samples_align);
107 out = ff_get_audio_buffer(ctx->outputs[0], nb_samples);
109 return AVERROR(ENOMEM);
112 s->pts += nb_samples;
114 if (av_get_packed_sample_fmt(ctx->inputs[0]->format) == AV_SAMPLE_FMT_FLT) {
115 for (i = 0; i < s->planes; i++) {
116 s->fdsp->vector_fmul((float *)out->extended_data[i],
117 (const float *)s->frames[0]->extended_data[i],
118 (const float *)s->frames[1]->extended_data[i],
122 for (i = 0; i < s->planes; i++) {
123 s->fdsp->vector_dmul((double *)out->extended_data[i],
124 (const double *)s->frames[0]->extended_data[i],
125 (const double *)s->frames[1]->extended_data[i],
131 av_frame_free(&s->frames[0]);
132 av_frame_free(&s->frames[1]);
134 ret = ff_filter_frame(ctx->outputs[0], out);
140 for (i = 0; i < 2; i++) {
141 if (ff_inlink_acknowledge_status(ctx->inputs[i], &status, &pts)) {
142 ff_outlink_set_status(ctx->outputs[0], status, pts);
148 if (ff_outlink_frame_wanted(ctx->outputs[0])) {
149 for (i = 0; i < 2; i++) {
150 if (ff_inlink_queued_samples(ctx->inputs[i]) > 0)
152 ff_inlink_request_frame(ctx->inputs[i]);
159 static int config_output(AVFilterLink *outlink)
161 AVFilterContext *ctx = outlink->src;
162 AudioMultiplyContext *s = ctx->priv;
163 AVFilterLink *inlink = ctx->inputs[0];
165 s->channels = inlink->channels;
166 s->planes = av_sample_fmt_is_planar(inlink->format) ? inlink->channels : 1;
167 s->samples_align = 16;
172 static av_cold int init(AVFilterContext *ctx)
174 AudioMultiplyContext *s = ctx->priv;
176 s->fdsp = avpriv_float_dsp_alloc(0);
178 return AVERROR(ENOMEM);
183 static av_cold void uninit(AVFilterContext *ctx)
185 AudioMultiplyContext *s = ctx->priv;
189 static const AVFilterPad inputs[] = {
192 .type = AVMEDIA_TYPE_AUDIO,
196 .type = AVMEDIA_TYPE_AUDIO,
201 static const AVFilterPad outputs[] = {
204 .type = AVMEDIA_TYPE_AUDIO,
205 .config_props = config_output,
210 AVFilter ff_af_amultiply = {
212 .description = NULL_IF_CONFIG_SMALL("Multiply two audio streams."),
213 .priv_size = sizeof(AudioMultiplyContext),
216 .activate = activate,
217 .query_formats = query_formats,