FFmpeg
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
split.c
Go to the documentation of this file.
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/internal.h"
29 #include "libavutil/mem.h"
30 #include "avfilter.h"
31 #include "audio.h"
32 #include "internal.h"
33 #include "video.h"
34 
35 static int split_init(AVFilterContext *ctx, const char *args)
36 {
37  int i, nb_outputs = 2;
38 
39  if (args) {
40  nb_outputs = strtol(args, NULL, 0);
41  if (nb_outputs <= 0) {
42  av_log(ctx, AV_LOG_ERROR, "Invalid number of outputs specified: %d.\n",
43  nb_outputs);
44  return AVERROR(EINVAL);
45  }
46  }
47 
48  for (i = 0; i < 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);
56 
57  ff_insert_outpad(ctx, i, &pad);
58  }
59 
60  return 0;
61 }
62 
63 static void split_uninit(AVFilterContext *ctx)
64 {
65  int i;
66 
67  for (i = 0; i < ctx->nb_outputs; i++)
68  av_freep(&ctx->output_pads[i].name);
69 }
70 
72 {
73  AVFilterContext *ctx = inlink->dst;
74  int i, ret = AVERROR_EOF;
75 
76  for (i = 0; i < ctx->nb_outputs; i++) {
77  AVFilterBufferRef *buf_out;
78 
79  if (ctx->outputs[i]->closed)
80  continue;
81  buf_out = avfilter_ref_buffer(frame, ~AV_PERM_WRITE);
82  if (!buf_out) {
83  ret = AVERROR(ENOMEM);
84  break;
85  }
86 
87  ret = ff_filter_frame(ctx->outputs[i], buf_out);
88  if (ret < 0)
89  break;
90  }
91  avfilter_unref_bufferp(&frame);
92  return ret;
93 }
94 
96  {
97  .name = "default",
98  .type = AVMEDIA_TYPE_VIDEO,
99  .get_video_buffer = ff_null_get_video_buffer,
100  .filter_frame = filter_frame,
101  },
102  { NULL }
103 };
104 
106  .name = "split",
107  .description = NULL_IF_CONFIG_SMALL("Pass on the input video to N outputs."),
108 
109  .init = split_init,
110  .uninit = split_uninit,
111 
112  .inputs = avfilter_vf_split_inputs,
113  .outputs = NULL,
114 };
115 
117  {
118  .name = "default",
119  .type = AVMEDIA_TYPE_AUDIO,
120  .get_audio_buffer = ff_null_get_audio_buffer,
121  .filter_frame = filter_frame,
122  },
123  { NULL }
124 };
125 
127  .name = "asplit",
128  .description = NULL_IF_CONFIG_SMALL("Pass on the audio input to N audio outputs."),
129 
130  .init = split_init,
131  .uninit = split_uninit,
132 
133  .inputs = avfilter_af_asplit_inputs,
134  .outputs = NULL,
135 };