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split.c
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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 "formats.h"
36 #include "internal.h"
37 #include "video.h"
38 
39 typedef struct SplitContext {
40  const AVClass *class;
42 } SplitContext;
43 
45 {
46  SplitContext *s = ctx->priv;
47  int i;
48 
49  for (i = 0; i < s->nb_outputs; i++) {
50  char name[32];
51  AVFilterPad pad = { 0 };
52 
53  snprintf(name, sizeof(name), "output%d", i);
54  pad.type = ctx->filter->inputs[0].type;
55  pad.name = av_strdup(name);
56  if (!pad.name)
57  return AVERROR(ENOMEM);
58 
59  ff_insert_outpad(ctx, i, &pad);
60  }
61 
62  return 0;
63 }
64 
66 {
67  int i;
68 
69  for (i = 0; i < ctx->nb_outputs; i++)
70  av_freep(&ctx->output_pads[i].name);
71 }
72 
73 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
74 {
75  AVFilterContext *ctx = inlink->dst;
76  int i, ret = AVERROR_EOF;
77 
78  for (i = 0; i < ctx->nb_outputs; i++) {
79  AVFrame *buf_out;
80 
81  if (ctx->outputs[i]->status)
82  continue;
83  buf_out = av_frame_clone(frame);
84  if (!buf_out) {
85  ret = AVERROR(ENOMEM);
86  break;
87  }
88 
89  ret = ff_filter_frame(ctx->outputs[i], buf_out);
90  if (ret < 0)
91  break;
92  }
93  av_frame_free(&frame);
94  return ret;
95 }
96 
97 #define OFFSET(x) offsetof(SplitContext, x)
98 #define FLAGS (AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM)
99 static const AVOption options[] = {
100  { "outputs", "set number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, FLAGS },
101  { NULL }
102 };
103 
104 #define split_options options
106 
107 #define asplit_options options
108 AVFILTER_DEFINE_CLASS(asplit);
109 
111  {
112  .name = "default",
113  .type = AVMEDIA_TYPE_VIDEO,
114  .filter_frame = filter_frame,
115  },
116  { NULL }
117 };
118 
120  .name = "split",
121  .description = NULL_IF_CONFIG_SMALL("Pass on the input to N video outputs."),
122  .priv_size = sizeof(SplitContext),
123  .priv_class = &split_class,
124  .init = split_init,
125  .uninit = split_uninit,
126  .inputs = avfilter_vf_split_inputs,
127  .outputs = NULL,
129 };
130 
132  {
133  .name = "default",
134  .type = AVMEDIA_TYPE_AUDIO,
135  .filter_frame = filter_frame,
136  },
137  { NULL }
138 };
139 
141  .name = "asplit",
142  .description = NULL_IF_CONFIG_SMALL("Pass on the audio input to N audio outputs."),
143  .priv_size = sizeof(SplitContext),
144  .priv_class = &asplit_class,
145  .init = split_init,
146  .uninit = split_uninit,
148  .inputs = avfilter_af_asplit_inputs,
149  .outputs = NULL,
151 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
This structure describes decoded (raw) audio or video data.
Definition: frame.h:180
AVOption.
Definition: opt.h:245
AVFormatContext * ctx
Definition: movenc-test.c:48
Main libavfilter public API header.
memory handling functions
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: split.c:73
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:64
static av_cold void split_uninit(AVFilterContext *ctx)
Definition: split.c:65
Macro definitions for various function/variable attributes.
static av_cold int split_init(AVFilterContext *ctx)
Definition: split.c:44
const char * name
Pad name.
Definition: internal.h:59
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1180
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:316
#define av_cold
Definition: attributes.h:82
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:337
AVOptions.
static AVFrame * frame
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:109
AVFilter ff_vf_split
Definition: split.c:119
A filter pad used for either input or output.
Definition: internal.h:53
#define FLAGS
Definition: split.c:98
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:153
unsigned nb_outputs
number of output pads
Definition: avfilter.h:318
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
#define OFFSET(x)
Definition: split.c:97
void * priv
private data for use by the filter
Definition: avfilter.h:320
static const AVFilterPad avfilter_af_asplit_inputs[]
Definition: split.c:131
static char * split(char *message, char delim)
Definition: af_channelmap.c:81
common internal API header
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:468
const AVFilterPad * inputs
List of inputs, terminated by a zeroed element.
Definition: avfilter.h:162
static const AVFilterPad avfilter_vf_split_inputs[]
Definition: split.c:110
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
AVFilter ff_af_asplit
Definition: split.c:140
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
AVFILTER_DEFINE_CLASS(split)
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:142
int ff_query_formats_all(AVFilterContext *ctx)
Set the formats list to all existing formats.
Definition: formats.c:602
const char * name
Filter name.
Definition: avfilter.h:146
#define snprintf
Definition: snprintf.h:34
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:317
static int flags
Definition: cpu.c:47
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:244
static const AVOption options[]
Definition: split.c:99
int nb_outputs
Definition: split.c:41
An instance of a filter.
Definition: avfilter.h:305
#define av_freep(p)
internal API functions
static int ff_insert_outpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new output pad for the filter.
Definition: internal.h:291
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:308
const char * name
Definition: opengl_enc.c:103