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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2011 Mina Nagy Zaki |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | /** |
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| 22 | * @file |
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| 23 | * format audio filter |
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| 24 | */ |
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| 25 | |||
| 26 | #include "libavutil/avstring.h" |
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| 27 | #include "libavutil/channel_layout.h" |
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| 28 | #include "libavutil/common.h" |
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| 29 | #include "libavutil/opt.h" |
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| 30 | |||
| 31 | #include "audio.h" |
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| 32 | #include "avfilter.h" |
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| 33 | #include "formats.h" |
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| 34 | #include "internal.h" |
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| 35 | |||
| 36 | typedef struct AFormatContext { |
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| 37 | const AVClass *class; |
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| 38 | |||
| 39 | AVFilterFormats *formats; |
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| 40 | AVFilterFormats *sample_rates; |
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| 41 | AVFilterChannelLayouts *channel_layouts; |
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| 42 | |||
| 43 | char *formats_str; |
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| 44 | char *sample_rates_str; |
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| 45 | char *channel_layouts_str; |
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| 46 | } AFormatContext; |
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| 47 | |||
| 48 | #define OFFSET(x) offsetof(AFormatContext, x) |
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| 49 | #define A AV_OPT_FLAG_AUDIO_PARAM |
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| 50 | #define F AV_OPT_FLAG_FILTERING_PARAM |
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| 51 | static const AVOption aformat_options[] = { |
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| 52 | { "sample_fmts", "A comma-separated list of sample formats.", OFFSET(formats_str), AV_OPT_TYPE_STRING, .flags = A|F }, |
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| 53 | { "sample_rates", "A comma-separated list of sample rates.", OFFSET(sample_rates_str), AV_OPT_TYPE_STRING, .flags = A|F }, |
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| 54 | { "channel_layouts", "A comma-separated list of channel layouts.", OFFSET(channel_layouts_str), AV_OPT_TYPE_STRING, .flags = A|F }, |
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| 55 | { NULL } |
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| 56 | }; |
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| 57 | |||
| 58 | AVFILTER_DEFINE_CLASS(aformat); |
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| 59 | |||
| 60 | #define PARSE_FORMATS(str, type, list, add_to_list, get_fmt, none, desc) \ |
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| 61 | do { \ |
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| 62 | char *next, *cur = str, sep; \ |
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| 63 | \ |
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| 64 | if (str && strchr(str, ',')) { \ |
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| 65 | av_log(ctx, AV_LOG_WARNING, "This syntax is deprecated, use '|' to "\ |
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| 66 | "separate %s.\n", desc); \ |
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| 67 | sep = ','; \ |
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| 68 | } else \ |
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| 69 | sep = '|'; \ |
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| 70 | \ |
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| 71 | while (cur) { \ |
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| 72 | type fmt; \ |
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| 73 | next = strchr(cur, sep); \ |
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| 74 | if (next) \ |
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| 75 | *next++ = 0; \ |
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| 76 | \ |
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| 77 | if ((fmt = get_fmt(cur)) == none) { \ |
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| 78 | av_log(ctx, AV_LOG_ERROR, "Error parsing " desc ": %s.\n", cur);\ |
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| 79 | return AVERROR(EINVAL); \ |
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| 80 | } \ |
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| 81 | add_to_list(&list, fmt); \ |
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| 82 | \ |
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| 83 | cur = next; \ |
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| 84 | } \ |
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| 85 | } while (0) |
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| 86 | |||
| 87 | static int get_sample_rate(const char *samplerate) |
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| 88 | { |
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| 89 | int ret = strtol(samplerate, NULL, 0); |
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| 90 | return FFMAX(ret, 0); |
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| 91 | } |
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| 92 | |||
| 93 | static av_cold int init(AVFilterContext *ctx) |
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| 94 | { |
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| 95 | AFormatContext *s = ctx->priv; |
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| 96 | |||
| 97 | PARSE_FORMATS(s->formats_str, enum AVSampleFormat, s->formats, |
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| 98 | ff_add_format, av_get_sample_fmt, AV_SAMPLE_FMT_NONE, "sample format"); |
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| 99 | PARSE_FORMATS(s->sample_rates_str, int, s->sample_rates, ff_add_format, |
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| 100 | get_sample_rate, 0, "sample rate"); |
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| 101 | PARSE_FORMATS(s->channel_layouts_str, uint64_t, s->channel_layouts, |
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| 102 | ff_add_channel_layout, av_get_channel_layout, 0, |
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| 103 | "channel layout"); |
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| 104 | |||
| 105 | return 0; |
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| 106 | } |
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| 107 | |||
| 108 | static int query_formats(AVFilterContext *ctx) |
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| 109 | { |
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| 110 | AFormatContext *s = ctx->priv; |
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| 111 | |||
| 112 | ff_set_common_formats(ctx, s->formats ? s->formats : |
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| 113 | ff_all_formats(AVMEDIA_TYPE_AUDIO)); |
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| 114 | ff_set_common_samplerates(ctx, s->sample_rates ? s->sample_rates : |
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| 115 | ff_all_samplerates()); |
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| 116 | ff_set_common_channel_layouts(ctx, s->channel_layouts ? s->channel_layouts : |
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| 117 | ff_all_channel_counts()); |
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| 118 | |||
| 119 | return 0; |
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| 120 | } |
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| 121 | |||
| 122 | static const AVFilterPad avfilter_af_aformat_inputs[] = { |
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| 123 | { |
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| 124 | .name = "default", |
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| 125 | .type = AVMEDIA_TYPE_AUDIO, |
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| 126 | }, |
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| 127 | { NULL } |
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| 128 | }; |
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| 129 | |||
| 130 | static const AVFilterPad avfilter_af_aformat_outputs[] = { |
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| 131 | { |
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| 132 | .name = "default", |
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| 133 | .type = AVMEDIA_TYPE_AUDIO |
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| 134 | }, |
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| 135 | { NULL } |
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| 136 | }; |
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| 137 | |||
| 138 | AVFilter avfilter_af_aformat = { |
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| 139 | .name = "aformat", |
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| 140 | .description = NULL_IF_CONFIG_SMALL("Convert the input audio to one of the specified formats."), |
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| 141 | .init = init, |
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| 142 | .query_formats = query_formats, |
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| 143 | .priv_size = sizeof(AFormatContext), |
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| 144 | .priv_class = &aformat_class, |
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| 145 | .inputs = avfilter_af_aformat_inputs, |
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| 146 | .outputs = avfilter_af_aformat_outputs, |
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| 147 | }; |