+++ /dev/null
-/*
- * Copyright (c) 2010 S.N. Hemanth Meenakshisundaram <smeenaks@ucsd.edu>
- * Copyright (c) 2011 Stefano Sabatini
- * Copyright (c) 2011 Mina Nagy Zaki
- *
- * 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
- */
-
-/**
- * @file
- * sample format and channel layout conversion audio filter
- */
-
-#include "libavutil/channel_layout.h"
-#include "libavutil/opt.h"
-#include "libswresample/swresample.h"
-#include "avfilter.h"
-#include "audio.h"
-#include "internal.h"
-
-typedef struct {
- const AVClass *class;
- enum AVSampleFormat out_sample_fmt;
- int64_t out_chlayout;
- struct SwrContext *swr;
- char *format_str;
- char *channel_layout_str;
-} AConvertContext;
-
-#define OFFSET(x) offsetof(AConvertContext, x)
-#define A AV_OPT_FLAG_AUDIO_PARAM
-#define F AV_OPT_FLAG_FILTERING_PARAM
-static const AVOption aconvert_options[] = {
- { "sample_fmt", "", OFFSET(format_str), AV_OPT_TYPE_STRING, .flags = A|F },
- { "channel_layout", "", OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A|F },
- { NULL }
-};
-
-AVFILTER_DEFINE_CLASS(aconvert);
-
-static av_cold int init(AVFilterContext *ctx)
-{
- AConvertContext *aconvert = ctx->priv;
- int ret = 0;
-
- av_log(ctx, AV_LOG_WARNING, "This filter is deprecated, use aformat instead\n");
-
- aconvert->out_sample_fmt = AV_SAMPLE_FMT_NONE;
- aconvert->out_chlayout = 0;
-
- if (aconvert->format_str && strcmp(aconvert->format_str, "auto") &&
- (ret = ff_parse_sample_format(&aconvert->out_sample_fmt, aconvert->format_str, ctx)) < 0)
- return ret;
- if (aconvert->channel_layout_str && strcmp(aconvert->channel_layout_str, "auto"))
- return ff_parse_channel_layout(&aconvert->out_chlayout, NULL, aconvert->channel_layout_str, ctx);
- return ret;
-}
-
-static av_cold void uninit(AVFilterContext *ctx)
-{
- AConvertContext *aconvert = ctx->priv;
- swr_free(&aconvert->swr);
-}
-
-static int query_formats(AVFilterContext *ctx)
-{
- AVFilterFormats *formats = NULL;
- AConvertContext *aconvert = ctx->priv;
- AVFilterLink *inlink = ctx->inputs[0];
- AVFilterLink *outlink = ctx->outputs[0];
- AVFilterChannelLayouts *layouts;
-
- ff_formats_ref(ff_all_formats(AVMEDIA_TYPE_AUDIO),
- &inlink->out_formats);
- if (aconvert->out_sample_fmt != AV_SAMPLE_FMT_NONE) {
- formats = NULL;
- ff_add_format(&formats, aconvert->out_sample_fmt);
- ff_formats_ref(formats, &outlink->in_formats);
- } else
- ff_formats_ref(ff_all_formats(AVMEDIA_TYPE_AUDIO),
- &outlink->in_formats);
-
- ff_channel_layouts_ref(ff_all_channel_layouts(),
- &inlink->out_channel_layouts);
- if (aconvert->out_chlayout != 0) {
- layouts = NULL;
- ff_add_channel_layout(&layouts, aconvert->out_chlayout);
- ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts);
- } else
- ff_channel_layouts_ref(ff_all_channel_layouts(),
- &outlink->in_channel_layouts);
-
- return 0;
-}
-
-static int config_output(AVFilterLink *outlink)
-{
- int ret;
- AVFilterContext *ctx = outlink->src;
- AVFilterLink *inlink = ctx->inputs[0];
- AConvertContext *aconvert = ctx->priv;
- char buf1[64], buf2[64];
-
- /* if not specified in args, use the format and layout of the output */
- if (aconvert->out_sample_fmt == AV_SAMPLE_FMT_NONE)
- aconvert->out_sample_fmt = outlink->format;
- if (aconvert->out_chlayout == 0)
- aconvert->out_chlayout = outlink->channel_layout;
-
- aconvert->swr = swr_alloc_set_opts(aconvert->swr,
- aconvert->out_chlayout, aconvert->out_sample_fmt, inlink->sample_rate,
- inlink->channel_layout, inlink->format, inlink->sample_rate,
- 0, ctx);
- if (!aconvert->swr)
- return AVERROR(ENOMEM);
- ret = swr_init(aconvert->swr);
- if (ret < 0)
- return ret;
-
- av_get_channel_layout_string(buf1, sizeof(buf1),
- -1, inlink ->channel_layout);
- av_get_channel_layout_string(buf2, sizeof(buf2),
- -1, outlink->channel_layout);
- av_log(ctx, AV_LOG_VERBOSE,
- "fmt:%s cl:%s -> fmt:%s cl:%s\n",
- av_get_sample_fmt_name(inlink ->format), buf1,
- av_get_sample_fmt_name(outlink->format), buf2);
-
- return 0;
-}
-
-static int filter_frame(AVFilterLink *inlink, AVFrame *insamplesref)
-{
- AConvertContext *aconvert = inlink->dst->priv;
- const int n = insamplesref->nb_samples;
- AVFilterLink *const outlink = inlink->dst->outputs[0];
- AVFrame *outsamplesref = ff_get_audio_buffer(outlink, n);
- int ret;
-
- if (!outsamplesref)
- return AVERROR(ENOMEM);
- swr_convert(aconvert->swr, outsamplesref->extended_data, n,
- (void *)insamplesref->extended_data, n);
-
- av_frame_copy_props(outsamplesref, insamplesref);
- av_frame_set_channels(outsamplesref, outlink->channels);
- outsamplesref->channel_layout = outlink->channel_layout;
-
- ret = ff_filter_frame(outlink, outsamplesref);
- av_frame_free(&insamplesref);
- return ret;
-}
-
-static const AVFilterPad aconvert_inputs[] = {
- {
- .name = "default",
- .type = AVMEDIA_TYPE_AUDIO,
- .filter_frame = filter_frame,
- },
- { NULL }
-};
-
-static const AVFilterPad aconvert_outputs[] = {
- {
- .name = "default",
- .type = AVMEDIA_TYPE_AUDIO,
- .config_props = config_output,
- },
- { NULL }
-};
-
-AVFilter ff_af_aconvert = {
- .name = "aconvert",
- .description = NULL_IF_CONFIG_SMALL("Convert the input audio to sample_fmt:channel_layout."),
- .priv_size = sizeof(AConvertContext),
- .priv_class = &aconvert_class,
- .init = init,
- .uninit = uninit,
- .query_formats = query_formats,
- .inputs = aconvert_inputs,
- .outputs = aconvert_outputs,
-};
repositories / deb_ffmpeg.git / blobdiff