| /* |
| * 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 = av_strtok(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 = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .filter_samples = filter_samples}, |
| { .name = NULL}}, |
| .outputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO}, |
| { .name = NULL}}, |
| }; |