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@@ -1,369 +0,0 @@
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-/*
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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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-
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-/**
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- * @file
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- * sample format and channel layout conversion audio filter
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- */
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-
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-#include "libavutil/avassert.h"
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-#include "libavutil/avstring.h"
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-#include "libavutil/common.h"
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-#include "libavutil/dict.h"
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-#include "libavutil/mathematics.h"
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-#include "libavutil/opt.h"
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-
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-#include "libavresample/avresample.h"
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-
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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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-
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-typedef struct ResampleContext {
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- const AVClass *class;
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- AVAudioResampleContext *avr;
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- AVDictionary *options;
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-
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- int resampling;
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- int64_t next_pts;
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- int64_t next_in_pts;
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-
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- /* set by filter_frame() to signal an output frame to request_frame() */
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- int got_output;
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-} ResampleContext;
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-
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-static av_cold int init(AVFilterContext *ctx, AVDictionary **opts)
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-{
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- ResampleContext *s = ctx->priv;
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- const AVClass *avr_class = avresample_get_class();
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- AVDictionaryEntry *e = NULL;
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-
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- while ((e = av_dict_get(*opts, "", e, AV_DICT_IGNORE_SUFFIX))) {
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- if (av_opt_find(&avr_class, e->key, NULL, 0,
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- AV_OPT_SEARCH_FAKE_OBJ | AV_OPT_SEARCH_CHILDREN))
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- av_dict_set(&s->options, e->key, e->value, 0);
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- }
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-
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- e = NULL;
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- while ((e = av_dict_get(s->options, "", e, AV_DICT_IGNORE_SUFFIX)))
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- av_dict_set(opts, e->key, NULL, 0);
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-
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- /* do not allow the user to override basic format options */
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- av_dict_set(&s->options, "in_channel_layout", NULL, 0);
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- av_dict_set(&s->options, "out_channel_layout", NULL, 0);
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- av_dict_set(&s->options, "in_sample_fmt", NULL, 0);
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- av_dict_set(&s->options, "out_sample_fmt", NULL, 0);
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- av_dict_set(&s->options, "in_sample_rate", NULL, 0);
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- av_dict_set(&s->options, "out_sample_rate", NULL, 0);
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-
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- return 0;
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-}
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-
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-static av_cold void uninit(AVFilterContext *ctx)
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-{
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- ResampleContext *s = ctx->priv;
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-
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- if (s->avr) {
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- avresample_close(s->avr);
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- avresample_free(&s->avr);
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- }
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- av_dict_free(&s->options);
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-}
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-
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-static int query_formats(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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- AVFilterFormats *in_formats, *out_formats, *in_samplerates, *out_samplerates;
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- AVFilterChannelLayouts *in_layouts, *out_layouts;
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- int ret;
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-
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- if (!(in_formats = ff_all_formats (AVMEDIA_TYPE_AUDIO)) ||
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- !(out_formats = ff_all_formats (AVMEDIA_TYPE_AUDIO)) ||
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- !(in_samplerates = ff_all_samplerates ( )) ||
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- !(out_samplerates = ff_all_samplerates ( )) ||
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- !(in_layouts = ff_all_channel_layouts ( )) ||
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- !(out_layouts = ff_all_channel_layouts ( )))
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- return AVERROR(ENOMEM);
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-
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- if ((ret = ff_formats_ref (in_formats, &inlink->outcfg.formats )) < 0 ||
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- (ret = ff_formats_ref (out_formats, &outlink->incfg.formats )) < 0 ||
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- (ret = ff_formats_ref (in_samplerates, &inlink->outcfg.samplerates )) < 0 ||
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- (ret = ff_formats_ref (out_samplerates, &outlink->incfg.samplerates )) < 0 ||
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- (ret = ff_channel_layouts_ref (in_layouts, &inlink->outcfg.channel_layouts)) < 0 ||
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- (ret = ff_channel_layouts_ref (out_layouts, &outlink->incfg.channel_layouts)) < 0)
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- return ret;
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-
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- return 0;
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-}
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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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- AVFilterLink *inlink = ctx->inputs[0];
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- ResampleContext *s = ctx->priv;
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- char buf1[64], buf2[64];
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- int ret;
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-
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- int64_t resampling_forced;
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-
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- if (s->avr) {
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- avresample_close(s->avr);
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- avresample_free(&s->avr);
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- }
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-
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- if (inlink->channel_layout == outlink->channel_layout &&
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- inlink->sample_rate == outlink->sample_rate &&
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- (inlink->format == outlink->format ||
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- (av_get_channel_layout_nb_channels(inlink->channel_layout) == 1 &&
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- av_get_channel_layout_nb_channels(outlink->channel_layout) == 1 &&
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- av_get_planar_sample_fmt(inlink->format) ==
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- av_get_planar_sample_fmt(outlink->format))))
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- return 0;
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-
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- if (!(s->avr = avresample_alloc_context()))
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- return AVERROR(ENOMEM);
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-
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- if (s->options) {
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- int ret;
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- AVDictionaryEntry *e = NULL;
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- while ((e = av_dict_get(s->options, "", e, AV_DICT_IGNORE_SUFFIX)))
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- av_log(ctx, AV_LOG_VERBOSE, "lavr option: %s=%s\n", e->key, e->value);
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-
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- ret = av_opt_set_dict(s->avr, &s->options);
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- if (ret < 0)
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- return ret;
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- }
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-
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- av_opt_set_int(s->avr, "in_channel_layout", inlink ->channel_layout, 0);
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- av_opt_set_int(s->avr, "out_channel_layout", outlink->channel_layout, 0);
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- av_opt_set_int(s->avr, "in_sample_fmt", inlink ->format, 0);
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- av_opt_set_int(s->avr, "out_sample_fmt", outlink->format, 0);
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- av_opt_set_int(s->avr, "in_sample_rate", inlink ->sample_rate, 0);
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- av_opt_set_int(s->avr, "out_sample_rate", outlink->sample_rate, 0);
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-
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- if ((ret = avresample_open(s->avr)) < 0)
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- return ret;
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-
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- av_opt_get_int(s->avr, "force_resampling", 0, &resampling_forced);
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- s->resampling = resampling_forced || (inlink->sample_rate != outlink->sample_rate);
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-
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- if (s->resampling) {
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- outlink->time_base = (AVRational){ 1, outlink->sample_rate };
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- s->next_pts = AV_NOPTS_VALUE;
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- s->next_in_pts = AV_NOPTS_VALUE;
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- } else
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- outlink->time_base = inlink->time_base;
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-
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- av_get_channel_layout_string(buf1, sizeof(buf1),
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- -1, inlink ->channel_layout);
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- av_get_channel_layout_string(buf2, sizeof(buf2),
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- -1, outlink->channel_layout);
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- av_log(ctx, AV_LOG_VERBOSE,
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- "fmt:%s srate:%d cl:%s -> fmt:%s srate:%d cl:%s\n",
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- av_get_sample_fmt_name(inlink ->format), inlink ->sample_rate, buf1,
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- av_get_sample_fmt_name(outlink->format), outlink->sample_rate, buf2);
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-
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- return 0;
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-}
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-
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-static int request_frame(AVFilterLink *outlink)
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-{
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- AVFilterContext *ctx = outlink->src;
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- ResampleContext *s = ctx->priv;
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- int ret = 0;
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-
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- s->got_output = 0;
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- while (ret >= 0 && !s->got_output)
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- ret = ff_request_frame(ctx->inputs[0]);
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-
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- /* flush the lavr delay buffer */
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- if (ret == AVERROR_EOF && s->avr) {
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- AVFrame *frame;
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- int nb_samples = avresample_get_out_samples(s->avr, 0);
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-
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- if (!nb_samples)
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- return ret;
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-
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- frame = ff_get_audio_buffer(outlink, nb_samples);
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- if (!frame)
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- return AVERROR(ENOMEM);
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-
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- ret = avresample_convert(s->avr, frame->extended_data,
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- frame->linesize[0], nb_samples,
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- NULL, 0, 0);
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- if (ret <= 0) {
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- av_frame_free(&frame);
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- return (ret == 0) ? AVERROR_EOF : ret;
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- }
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-
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- frame->nb_samples = ret;
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- frame->pts = s->next_pts;
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- return ff_filter_frame(outlink, frame);
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- }
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- return ret;
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-}
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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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- ResampleContext *s = ctx->priv;
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- AVFilterLink *outlink = ctx->outputs[0];
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- int ret;
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-
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- if (s->avr) {
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- AVFrame *out;
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- int delay, nb_samples;
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-
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- /* maximum possible samples lavr can output */
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- delay = avresample_get_delay(s->avr);
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- nb_samples = avresample_get_out_samples(s->avr, in->nb_samples);
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-
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- out = ff_get_audio_buffer(outlink, nb_samples);
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- if (!out) {
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- ret = AVERROR(ENOMEM);
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- goto fail;
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- }
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-
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- ret = avresample_convert(s->avr, out->extended_data, out->linesize[0],
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- nb_samples, in->extended_data, in->linesize[0],
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- in->nb_samples);
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- if (ret <= 0) {
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- av_frame_free(&out);
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- if (ret < 0)
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- goto fail;
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- }
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-
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- av_assert0(!avresample_available(s->avr));
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-
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- if (s->resampling && s->next_pts == AV_NOPTS_VALUE) {
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- if (in->pts == AV_NOPTS_VALUE) {
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- av_log(ctx, AV_LOG_WARNING, "First timestamp is missing, "
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- "assuming 0.\n");
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- s->next_pts = 0;
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- } else
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- s->next_pts = av_rescale_q(in->pts, inlink->time_base,
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- outlink->time_base);
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- }
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-
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- if (ret > 0) {
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- out->nb_samples = ret;
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-
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- ret = av_frame_copy_props(out, in);
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- if (ret < 0) {
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- av_frame_free(&out);
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- goto fail;
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- }
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-
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- if (s->resampling) {
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- out->sample_rate = outlink->sample_rate;
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- /* Only convert in->pts if there is a discontinuous jump.
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- This ensures that out->pts tracks the number of samples actually
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- output by the resampler in the absence of such a jump.
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- Otherwise, the rounding in av_rescale_q() and av_rescale()
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- causes off-by-1 errors. */
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- if (in->pts != AV_NOPTS_VALUE && in->pts != s->next_in_pts) {
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- out->pts = av_rescale_q(in->pts, inlink->time_base,
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- outlink->time_base) -
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- av_rescale(delay, outlink->sample_rate,
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- inlink->sample_rate);
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- } else
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- out->pts = s->next_pts;
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-
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- s->next_pts = out->pts + out->nb_samples;
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- s->next_in_pts = in->pts + in->nb_samples;
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- } else
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- out->pts = in->pts;
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-
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- ret = ff_filter_frame(outlink, out);
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- s->got_output = 1;
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- }
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-
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-fail:
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- av_frame_free(&in);
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- } else {
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- in->format = outlink->format;
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- ret = ff_filter_frame(outlink, in);
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- s->got_output = 1;
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- }
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-
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- return ret;
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-}
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-
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-#if FF_API_CHILD_CLASS_NEXT
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-static const AVClass *resample_child_class_next(const AVClass *prev)
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-{
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- return prev ? NULL : avresample_get_class();
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-}
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-#endif
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-
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-static const AVClass *resample_child_class_iterate(void **iter)
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-{
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- const AVClass *c = *iter ? NULL : avresample_get_class();
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- *iter = (void*)(uintptr_t)c;
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- return c;
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-}
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-
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-static void *resample_child_next(void *obj, void *prev)
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-{
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- ResampleContext *s = obj;
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- return prev ? NULL : s->avr;
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-}
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-
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-static const AVClass resample_class = {
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- .class_name = "resample",
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- .item_name = av_default_item_name,
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- .version = LIBAVUTIL_VERSION_INT,
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-#if FF_API_CHILD_CLASS_NEXT
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- .child_class_next = resample_child_class_next,
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-#endif
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- .child_class_iterate = resample_child_class_iterate,
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- .child_next = resample_child_next,
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-};
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-
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-static const AVFilterPad avfilter_af_resample_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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-
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-static const AVFilterPad avfilter_af_resample_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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- .request_frame = request_frame
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- },
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- { NULL }
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-};
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-
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-AVFilter ff_af_resample = {
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- .name = "resample",
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- .description = NULL_IF_CONFIG_SMALL("Audio resampling and conversion."),
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- .priv_size = sizeof(ResampleContext),
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- .priv_class = &resample_class,
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- .init_dict = init,
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- .uninit = uninit,
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- .query_formats = query_formats,
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- .inputs = avfilter_af_resample_inputs,
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- .outputs = avfilter_af_resample_outputs,
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-};
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Andreas Rheinhardt