mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
183 lines
5.4 KiB
183 lines
5.4 KiB
/* |
|
* Copyright (c) 2018 Paul B Mahol |
|
* |
|
* 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/common.h" |
|
#include "libavutil/float_dsp.h" |
|
#include "libavutil/mem.h" |
|
|
|
#include "audio.h" |
|
#include "avfilter.h" |
|
#include "filters.h" |
|
|
|
typedef struct AudioMultiplyContext { |
|
const AVClass *class; |
|
|
|
AVFrame *frames[2]; |
|
int planes; |
|
int channels; |
|
int samples_align; |
|
|
|
AVFloatDSPContext *fdsp; |
|
} AudioMultiplyContext; |
|
|
|
static int activate(AVFilterContext *ctx) |
|
{ |
|
AudioMultiplyContext *s = ctx->priv; |
|
int i, ret, status; |
|
int nb_samples; |
|
int64_t pts; |
|
|
|
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx); |
|
|
|
nb_samples = FFMIN(ff_inlink_queued_samples(ctx->inputs[0]), |
|
ff_inlink_queued_samples(ctx->inputs[1])); |
|
for (i = 0; i < ctx->nb_inputs && nb_samples > 0; i++) { |
|
if (s->frames[i]) |
|
continue; |
|
|
|
if (ff_inlink_check_available_samples(ctx->inputs[i], nb_samples) > 0) { |
|
ret = ff_inlink_consume_samples(ctx->inputs[i], nb_samples, nb_samples, &s->frames[i]); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
} |
|
|
|
if (s->frames[0] && s->frames[1]) { |
|
AVFrame *out; |
|
int plane_samples; |
|
|
|
if (av_sample_fmt_is_planar(ctx->inputs[0]->format)) |
|
plane_samples = FFALIGN(s->frames[0]->nb_samples, s->samples_align); |
|
else |
|
plane_samples = FFALIGN(s->frames[0]->nb_samples * s->channels, s->samples_align); |
|
|
|
out = ff_get_audio_buffer(ctx->outputs[0], s->frames[0]->nb_samples); |
|
if (!out) |
|
return AVERROR(ENOMEM); |
|
|
|
out->pts = s->frames[0]->pts; |
|
out->duration = s->frames[0]->duration; |
|
|
|
if (av_get_packed_sample_fmt(ctx->inputs[0]->format) == AV_SAMPLE_FMT_FLT) { |
|
for (i = 0; i < s->planes; i++) { |
|
s->fdsp->vector_fmul((float *)out->extended_data[i], |
|
(const float *)s->frames[0]->extended_data[i], |
|
(const float *)s->frames[1]->extended_data[i], |
|
plane_samples); |
|
} |
|
} else { |
|
for (i = 0; i < s->planes; i++) { |
|
s->fdsp->vector_dmul((double *)out->extended_data[i], |
|
(const double *)s->frames[0]->extended_data[i], |
|
(const double *)s->frames[1]->extended_data[i], |
|
plane_samples); |
|
} |
|
} |
|
|
|
av_frame_free(&s->frames[0]); |
|
av_frame_free(&s->frames[1]); |
|
|
|
ret = ff_filter_frame(ctx->outputs[0], out); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
if (!nb_samples) { |
|
for (i = 0; i < 2; i++) { |
|
if (ff_inlink_acknowledge_status(ctx->inputs[i], &status, &pts)) { |
|
ff_outlink_set_status(ctx->outputs[0], status, pts); |
|
return 0; |
|
} |
|
} |
|
} |
|
|
|
if (ff_outlink_frame_wanted(ctx->outputs[0])) { |
|
for (i = 0; i < 2; i++) { |
|
if (s->frames[i] || ff_inlink_queued_samples(ctx->inputs[i]) > 0) |
|
continue; |
|
ff_inlink_request_frame(ctx->inputs[i]); |
|
return 0; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static int config_output(AVFilterLink *outlink) |
|
{ |
|
AVFilterContext *ctx = outlink->src; |
|
AudioMultiplyContext *s = ctx->priv; |
|
AVFilterLink *inlink = ctx->inputs[0]; |
|
|
|
s->channels = inlink->ch_layout.nb_channels; |
|
s->planes = av_sample_fmt_is_planar(inlink->format) ? inlink->ch_layout.nb_channels : 1; |
|
s->samples_align = 16; |
|
|
|
return 0; |
|
} |
|
|
|
static av_cold int init(AVFilterContext *ctx) |
|
{ |
|
AudioMultiplyContext *s = ctx->priv; |
|
|
|
s->fdsp = avpriv_float_dsp_alloc(0); |
|
if (!s->fdsp) |
|
return AVERROR(ENOMEM); |
|
|
|
return 0; |
|
} |
|
|
|
static av_cold void uninit(AVFilterContext *ctx) |
|
{ |
|
AudioMultiplyContext *s = ctx->priv; |
|
av_freep(&s->fdsp); |
|
} |
|
|
|
static const AVFilterPad inputs[] = { |
|
{ |
|
.name = "multiply0", |
|
.type = AVMEDIA_TYPE_AUDIO, |
|
}, |
|
{ |
|
.name = "multiply1", |
|
.type = AVMEDIA_TYPE_AUDIO, |
|
}, |
|
}; |
|
|
|
static const AVFilterPad outputs[] = { |
|
{ |
|
.name = "default", |
|
.type = AVMEDIA_TYPE_AUDIO, |
|
.config_props = config_output, |
|
}, |
|
}; |
|
|
|
const AVFilter ff_af_amultiply = { |
|
.name = "amultiply", |
|
.description = NULL_IF_CONFIG_SMALL("Multiply two audio streams."), |
|
.priv_size = sizeof(AudioMultiplyContext), |
|
.init = init, |
|
.uninit = uninit, |
|
.activate = activate, |
|
FILTER_INPUTS(inputs), |
|
FILTER_OUTPUTS(outputs), |
|
FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP, |
|
AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP), |
|
};
|
|
|