diff options
Diffstat (limited to 'libavfilter/af_aformat.c')
-rw-r--r-- | libavfilter/af_aformat.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/libavfilter/af_aformat.c b/libavfilter/af_aformat.c new file mode 100644 index 0000000..a7aa45f --- /dev/null +++ b/libavfilter/af_aformat.c @@ -0,0 +1,108 @@ +/* + * 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 + * format audio filter + */ + +#include "libavutil/audioconvert.h" +#include "libavutil/avstring.h" +#include "avfilter.h" +#include "internal.h" + +typedef struct { + AVFilterFormats *formats, *chlayouts, *packing; +} AFormatContext; + +static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) +{ + AFormatContext * const aformat = ctx->priv; + char *fmts_str = NULL, *fmt_str, *ptr = NULL; + int64_t fmt; + int ret; + + if (!args) + goto arg_fail; + +#define ADD_FORMATS(all_formats, fmt_name, fmt_type, fmts_list) \ + fmts_str = av_get_token(&args, ":"); \ + if (!fmts_str || !*fmts_str) \ + goto arg_fail; \ + if (!strcmp(fmts_str, "all")) { \ + aformat->fmts_list = all_formats; \ + } else { \ + for (fmt_str = fmts_str; \ + fmt_str = strtok_r(fmt_str, ",", &ptr); fmt_str = NULL) { \ + if ((ret = ff_parse_##fmt_name((fmt_type *)&fmt, \ + fmt_str, ctx)) < 0) { \ + av_freep(&fmts_str); \ + return ret; \ + } \ + avfilter_add_format(&aformat->fmts_list, fmt); \ + } \ + } \ + av_freep(&fmts_str); \ + if (*args) \ + args++; + + ADD_FORMATS(avfilter_make_all_formats(AVMEDIA_TYPE_AUDIO), sample_format, int, formats); + ADD_FORMATS(avfilter_make_all_channel_layouts(), channel_layout, int64_t, chlayouts); + ADD_FORMATS(avfilter_make_all_packing_formats(), packing_format, int, packing); + + return 0; + +arg_fail: + av_log(ctx, AV_LOG_ERROR, "Invalid arguments, they must be of the form " + "sample_fmts:channel_layouts:packing_fmts\n"); + av_freep(&fmts_str); + return AVERROR(EINVAL); +} + +static int query_formats(AVFilterContext *ctx) +{ + AFormatContext * const aformat = ctx->priv; + + avfilter_set_common_sample_formats (ctx, aformat->formats); + avfilter_set_common_channel_layouts(ctx, aformat->chlayouts); + avfilter_set_common_packing_formats(ctx, aformat->packing); + return 0; +} + +static void filter_samples(AVFilterLink *inlink, AVFilterBufferRef *insamplesref) +{ + avfilter_filter_samples(inlink->dst->outputs[0], insamplesref); +} + +AVFilter avfilter_af_aformat = { + .name = "aformat", + .description = NULL_IF_CONFIG_SMALL("Convert the input audio to one of the specified formats."), + .init = init, + .query_formats = query_formats, + .priv_size = sizeof(AFormatContext), + + .inputs = (AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .filter_samples = filter_samples}, + { .name = NULL}}, + .outputs = (AVFilterPad[]) {{ .name = "default", + .type = AVMEDIA_TYPE_AUDIO}, + { .name = NULL}}, +}; |