mirror of https://github.com/FFmpeg/FFmpeg.git
Signed-off-by: Anton Khirnov <anton@khirnov.net>pull/68/head
Alessandro Ghedini
11 years ago
committed by
Anton Khirnov
parent
eb3b5501e8
commit
1c0210c798
7 changed files with 260 additions and 1 deletions
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/*
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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/**
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* @file |
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* Bauer stereo-to-binaural filter |
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*/ |
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#include <bs2b.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 Bs2bContext { |
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const AVClass *class; |
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int profile; |
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int fcut; |
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int feed; |
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t_bs2bdp bs2bp; |
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void (*filter)(t_bs2bdp bs2bdp, uint8_t *sample, int n); |
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} Bs2bContext; |
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#define OFFSET(x) offsetof(Bs2bContext, x) |
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#define A AV_OPT_FLAG_AUDIO_PARAM |
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static const AVOption options[] = { |
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{ "profile", "Apply a pre-defined crossfeed level", |
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OFFSET(profile), AV_OPT_TYPE_INT, { .i64 = BS2B_DEFAULT_CLEVEL }, 0, INT_MAX, A, "profile" }, |
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{ "default", "default profile", 0, AV_OPT_TYPE_CONST, { .i64 = BS2B_DEFAULT_CLEVEL }, 0, 0, A, "profile" }, |
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{ "cmoy", "Chu Moy circuit", 0, AV_OPT_TYPE_CONST, { .i64 = BS2B_CMOY_CLEVEL }, 0, 0, A, "profile" }, |
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{ "jmeier", "Jan Meier circuit", 0, AV_OPT_TYPE_CONST, { .i64 = BS2B_JMEIER_CLEVEL }, 0, 0, A, "profile" }, |
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{ "fcut", "Set cut frequency (in Hz)", |
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OFFSET(fcut), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, BS2B_MAXFCUT, A }, |
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{ "feed", "Set feed level (in Hz)", |
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OFFSET(feed), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, BS2B_MAXFEED, A }, |
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{ NULL }, |
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}; |
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static const AVClass bs2b_class = { |
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.class_name = "bs2b filter", |
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.item_name = av_default_item_name, |
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.option = options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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static av_cold int init(AVFilterContext *ctx) |
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{ |
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Bs2bContext *bs2b = ctx->priv; |
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if (!(bs2b->bs2bp = bs2b_open())) |
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return AVERROR(ENOMEM); |
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bs2b_set_level(bs2b->bs2bp, bs2b->profile); |
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if (bs2b->fcut) |
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bs2b_set_level_fcut(bs2b->bs2bp, bs2b->fcut); |
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if (bs2b->feed) |
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bs2b_set_level_feed(bs2b->bs2bp, bs2b->feed); |
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return 0; |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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Bs2bContext *bs2b = ctx->priv; |
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if (bs2b->bs2bp) |
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bs2b_close(bs2b->bs2bp); |
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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_U8, |
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AV_SAMPLE_FMT_S16, |
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AV_SAMPLE_FMT_S32, |
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AV_SAMPLE_FMT_FLT, |
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AV_SAMPLE_FMT_DBL, |
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AV_SAMPLE_FMT_NONE, |
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}; |
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if (ff_add_channel_layout(&layouts, AV_CH_LAYOUT_STEREO) != 0) |
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return AVERROR(ENOMEM); |
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ff_set_common_channel_layouts(ctx, layouts); |
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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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ff_set_common_formats(ctx, formats); |
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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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ff_set_common_samplerates(ctx, formats); |
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return 0; |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
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{ |
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int ret; |
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AVFrame *out_frame; |
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Bs2bContext *bs2b = inlink->dst->priv; |
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AVFilterLink *outlink = inlink->dst->outputs[0]; |
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if (av_frame_is_writable(frame)) { |
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out_frame = frame; |
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} else { |
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out_frame = ff_get_audio_buffer(inlink, frame->nb_samples); |
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if (!out_frame) |
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return AVERROR(ENOMEM); |
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av_frame_copy(out_frame, frame); |
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ret = av_frame_copy_props(out_frame, frame); |
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if (ret < 0) { |
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av_frame_free(&out_frame); |
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av_frame_free(&frame); |
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return ret; |
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} |
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} |
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bs2b->filter(bs2b->bs2bp, out_frame->extended_data[0], out_frame->nb_samples); |
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if (frame != out_frame) |
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av_frame_free(&frame); |
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return ff_filter_frame(outlink, out_frame); |
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} |
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static int config_output(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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Bs2bContext *bs2b = ctx->priv; |
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AVFilterLink *inlink = ctx->inputs[0]; |
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int srate = inlink->sample_rate; |
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switch (inlink->format) { |
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case AV_SAMPLE_FMT_U8: |
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bs2b->filter = bs2b_cross_feed_u8; |
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break; |
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case AV_SAMPLE_FMT_S16: |
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bs2b->filter = bs2b_cross_feed_s16; |
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break; |
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case AV_SAMPLE_FMT_S32: |
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bs2b->filter = bs2b_cross_feed_s32; |
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break; |
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case AV_SAMPLE_FMT_FLT: |
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bs2b->filter = bs2b_cross_feed_f; |
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break; |
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case AV_SAMPLE_FMT_DBL: |
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bs2b->filter = bs2b_cross_feed_d; |
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break; |
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default: |
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return AVERROR_BUG; |
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} |
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if ((srate < BS2B_MINSRATE) || (srate > BS2B_MAXSRATE)) |
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return AVERROR(ENOSYS); |
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bs2b_set_srate(bs2b->bs2bp, srate); |
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return 0; |
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} |
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static const AVFilterPad bs2b_inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_AUDIO, |
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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 bs2b_outputs[] = { |
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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_output, |
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}, |
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{ NULL } |
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}; |
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AVFilter ff_af_bs2b = { |
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.name = "bs2b", |
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.description = NULL_IF_CONFIG_SMALL("Bauer stereo-to-binaural filter."), |
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.query_formats = query_formats, |
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.priv_size = sizeof(Bs2bContext), |
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.priv_class = &bs2b_class, |
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.init = init, |
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.uninit = uninit, |
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.inputs = bs2b_inputs, |
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.outputs = bs2b_outputs, |
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}; |
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