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1 | /* |
2 | * Copyright (c) 2007 Bobby Bingham | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | /** | |
22 | * @file | |
23 | * audio and video splitter | |
24 | */ | |
25 | ||
26 | #include <stdio.h> | |
27 | ||
28 | #include "libavutil/attributes.h" | |
29 | #include "libavutil/internal.h" | |
30 | #include "libavutil/mem.h" | |
31 | #include "libavutil/opt.h" | |
32 | ||
33 | #include "avfilter.h" | |
34 | #include "audio.h" | |
35 | #include "internal.h" | |
36 | #include "video.h" | |
37 | ||
38 | typedef struct SplitContext { | |
39 | const AVClass *class; | |
40 | int nb_outputs; | |
41 | } SplitContext; | |
42 | ||
43 | static av_cold int split_init(AVFilterContext *ctx) | |
44 | { | |
45 | SplitContext *s = ctx->priv; | |
46 | int i; | |
47 | ||
48 | for (i = 0; i < s->nb_outputs; i++) { | |
49 | char name[32]; | |
50 | AVFilterPad pad = { 0 }; | |
51 | ||
52 | snprintf(name, sizeof(name), "output%d", i); | |
53 | pad.type = ctx->filter->inputs[0].type; | |
54 | pad.name = av_strdup(name); | |
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55 | if (!pad.name) |
56 | return AVERROR(ENOMEM); | |
2ba45a60 DM |
57 | |
58 | ff_insert_outpad(ctx, i, &pad); | |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | static av_cold void split_uninit(AVFilterContext *ctx) | |
65 | { | |
66 | int i; | |
67 | ||
68 | for (i = 0; i < ctx->nb_outputs; i++) | |
69 | av_freep(&ctx->output_pads[i].name); | |
70 | } | |
71 | ||
72 | static int filter_frame(AVFilterLink *inlink, AVFrame *frame) | |
73 | { | |
74 | AVFilterContext *ctx = inlink->dst; | |
75 | int i, ret = AVERROR_EOF; | |
76 | ||
77 | for (i = 0; i < ctx->nb_outputs; i++) { | |
78 | AVFrame *buf_out; | |
79 | ||
80 | if (ctx->outputs[i]->closed) | |
81 | continue; | |
82 | buf_out = av_frame_clone(frame); | |
83 | if (!buf_out) { | |
84 | ret = AVERROR(ENOMEM); | |
85 | break; | |
86 | } | |
87 | ||
88 | ret = ff_filter_frame(ctx->outputs[i], buf_out); | |
89 | if (ret < 0) | |
90 | break; | |
91 | } | |
92 | av_frame_free(&frame); | |
93 | return ret; | |
94 | } | |
95 | ||
96 | #define OFFSET(x) offsetof(SplitContext, x) | |
97 | #define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM | |
98 | static const AVOption options[] = { | |
99 | { "outputs", "set number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, FLAGS }, | |
100 | { NULL } | |
101 | }; | |
102 | ||
103 | #define split_options options | |
104 | AVFILTER_DEFINE_CLASS(split); | |
105 | ||
106 | #define asplit_options options | |
107 | AVFILTER_DEFINE_CLASS(asplit); | |
108 | ||
109 | static const AVFilterPad avfilter_vf_split_inputs[] = { | |
110 | { | |
111 | .name = "default", | |
112 | .type = AVMEDIA_TYPE_VIDEO, | |
113 | .filter_frame = filter_frame, | |
114 | }, | |
115 | { NULL } | |
116 | }; | |
117 | ||
118 | AVFilter ff_vf_split = { | |
119 | .name = "split", | |
120 | .description = NULL_IF_CONFIG_SMALL("Pass on the input to N video outputs."), | |
121 | .priv_size = sizeof(SplitContext), | |
122 | .priv_class = &split_class, | |
123 | .init = split_init, | |
124 | .uninit = split_uninit, | |
125 | .inputs = avfilter_vf_split_inputs, | |
126 | .outputs = NULL, | |
127 | .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS, | |
128 | }; | |
129 | ||
130 | static const AVFilterPad avfilter_af_asplit_inputs[] = { | |
131 | { | |
132 | .name = "default", | |
133 | .type = AVMEDIA_TYPE_AUDIO, | |
134 | .filter_frame = filter_frame, | |
135 | }, | |
136 | { NULL } | |
137 | }; | |
138 | ||
139 | AVFilter ff_af_asplit = { | |
140 | .name = "asplit", | |
141 | .description = NULL_IF_CONFIG_SMALL("Pass on the audio input to N audio outputs."), | |
142 | .priv_size = sizeof(SplitContext), | |
143 | .priv_class = &asplit_class, | |
144 | .init = split_init, | |
145 | .uninit = split_uninit, | |
146 | .inputs = avfilter_af_asplit_inputs, | |
147 | .outputs = NULL, | |
148 | .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS, | |
149 | }; |