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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 #define FF_INTERNAL_FIELDS 1
34 #include "framequeue.h"
35 
36 #include "avfilter.h"
37 #include "audio.h"
38 #include "formats.h"
39 #include "internal.h"
40 #include "video.h"
41 
42 typedef struct SplitContext {
43  const AVClass *class;
45 } SplitContext;
46 
48 {
49  SplitContext *s = ctx->priv;
50  int i, ret;
51 
52  for (i = 0; i < s->nb_outputs; i++) {
53  char name[32];
54  AVFilterPad pad = { 0 };
55 
56  snprintf(name, sizeof(name), "output%d", i);
57  pad.type = ctx->filter->inputs[0].type;
58  pad.name = av_strdup(name);
59  if (!pad.name)
60  return AVERROR(ENOMEM);
61 
62  if ((ret = ff_insert_outpad(ctx, i, &pad)) < 0) {
63  av_freep(&pad.name);
64  return ret;
65  }
66  }
67 
68  return 0;
69 }
70 
72 {
73  int i;
74 
75  for (i = 0; i < ctx->nb_outputs; i++)
76  av_freep(&ctx->output_pads[i].name);
77 }
78 
79 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
80 {
81  AVFilterContext *ctx = inlink->dst;
82  int i, ret = AVERROR_EOF;
83 
84  for (i = 0; i < ctx->nb_outputs; i++) {
85  AVFrame *buf_out;
86 
87  if (ctx->outputs[i]->status_in)
88  continue;
89  buf_out = av_frame_clone(frame);
90  if (!buf_out) {
91  ret = AVERROR(ENOMEM);
92  break;
93  }
94 
95  ret = ff_filter_frame(ctx->outputs[i], buf_out);
96  if (ret < 0)
97  break;
98  }
99  av_frame_free(&frame);
100  return ret;
101 }
102 
103 #define OFFSET(x) offsetof(SplitContext, x)
104 #define FLAGS (AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM)
105 static const AVOption options[] = {
106  { "outputs", "set number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, FLAGS },
107  { NULL }
108 };
109 
110 #define split_options options
112 
113 #define asplit_options options
114 AVFILTER_DEFINE_CLASS(asplit);
115 
117  {
118  .name = "default",
119  .type = AVMEDIA_TYPE_VIDEO,
120  .filter_frame = filter_frame,
121  },
122  { NULL }
123 };
124 
126  .name = "split",
127  .description = NULL_IF_CONFIG_SMALL("Pass on the input to N video outputs."),
128  .priv_size = sizeof(SplitContext),
129  .priv_class = &split_class,
130  .init = split_init,
131  .uninit = split_uninit,
132  .inputs = avfilter_vf_split_inputs,
133  .outputs = NULL,
135 };
136 
138  {
139  .name = "default",
140  .type = AVMEDIA_TYPE_AUDIO,
141  .filter_frame = filter_frame,
142  },
143  { NULL }
144 };
145 
147  .name = "asplit",
148  .description = NULL_IF_CONFIG_SMALL("Pass on the audio input to N audio outputs."),
149  .priv_size = sizeof(SplitContext),
150  .priv_class = &asplit_class,
151  .init = split_init,
152  .uninit = split_uninit,
153  .inputs = avfilter_af_asplit_inputs,
154  .outputs = NULL,
156 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
AVOption.
Definition: opt.h:246
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:79
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
static av_cold void split_uninit(AVFilterContext *ctx)
Definition: split.c:71
Macro definitions for various function/variable attributes.
static av_cold int split_init(AVFilterContext *ctx)
Definition: split.c:47
const char * name
Pad name.
Definition: internal.h:60
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1113
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:349
#define av_cold
Definition: attributes.h:82
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:279
AVOptions.
static AVFrame * frame
static int flags
Definition: log.c:57
#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:111
AVFilter ff_vf_split
Definition: split.c:125
A filter pad used for either input or output.
Definition: internal.h:54
#define FLAGS
Definition: split.c:104
#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:163
unsigned nb_outputs
number of output pads
Definition: avfilter.h:351
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#define OFFSET(x)
Definition: split.c:103
void * priv
private data for use by the filter
Definition: avfilter.h:353
static const AVFilterPad avfilter_af_asplit_inputs[]
Definition: split.c:137
static char * split(char *message, char delim)
Definition: af_channelmap.c:81
common internal API header
AVFormatContext * ctx
Definition: movenc.c:48
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:497
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
const AVFilterPad * inputs
List of inputs, terminated by a zeroed element.
Definition: avfilter.h:164
static const AVFilterPad avfilter_vf_split_inputs[]
Definition: split.c:116
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
AVFilter ff_af_asplit
Definition: split.c:146
AVFILTER_DEFINE_CLASS(split)
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
const char * name
Filter name.
Definition: avfilter.h:148
#define snprintf
Definition: snprintf.h:34
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static const AVOption options[]
Definition: split.c:105
int nb_outputs
Definition: split.c:44
An instance of a filter.
Definition: avfilter.h:338
#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:285
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
const char * name
Definition: opengl_enc.c:103