FFmpeg
af_aformat.c
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1 /*
2  * Copyright (c) 2011 Mina Nagy Zaki
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  * format audio filter
24  */
25 
26 #include "libavutil/avstring.h"
28 #include "libavutil/common.h"
29 #include "libavutil/opt.h"
30 
31 #include "audio.h"
32 #include "avfilter.h"
33 #include "formats.h"
34 #include "internal.h"
35 
36 typedef struct AFormatContext {
37  const AVClass *class;
38 
42 
43  char *formats_str;
47 
48 #define OFFSET(x) offsetof(AFormatContext, x)
49 #define A AV_OPT_FLAG_AUDIO_PARAM
50 #define F AV_OPT_FLAG_FILTERING_PARAM
51 static const AVOption aformat_options[] = {
52  { "sample_fmts", "A '|'-separated list of sample formats.", OFFSET(formats_str), AV_OPT_TYPE_STRING, .flags = A|F },
53  { "f", "A '|'-separated list of sample formats.", OFFSET(formats_str), AV_OPT_TYPE_STRING, .flags = A|F },
54  { "sample_rates", "A '|'-separated list of sample rates.", OFFSET(sample_rates_str), AV_OPT_TYPE_STRING, .flags = A|F },
55  { "r", "A '|'-separated list of sample rates.", OFFSET(sample_rates_str), AV_OPT_TYPE_STRING, .flags = A|F },
56  { "channel_layouts", "A '|'-separated list of channel layouts.", OFFSET(channel_layouts_str), AV_OPT_TYPE_STRING, .flags = A|F },
57  { "cl", "A '|'-separated list of channel layouts.", OFFSET(channel_layouts_str), AV_OPT_TYPE_STRING, .flags = A|F },
58  { NULL }
59 };
60 
61 AVFILTER_DEFINE_CLASS(aformat);
62 
63 #define PARSE_FORMATS(str, type, list, add_to_list, unref_fn, get_fmt, none, desc) \
64 do { \
65  char *next, *cur = str, sep; \
66  int ret; \
67  \
68  if (str && strchr(str, ',')) { \
69  av_log(ctx, AV_LOG_WARNING, "This syntax is deprecated, use '|' to "\
70  "separate %s.\n", desc); \
71  sep = ','; \
72  } else \
73  sep = '|'; \
74  \
75  while (cur) { \
76  type fmt; \
77  next = strchr(cur, sep); \
78  if (next) \
79  *next++ = 0; \
80  \
81  if ((fmt = get_fmt(cur)) == none) { \
82  av_log(ctx, AV_LOG_ERROR, "Error parsing " desc ": %s.\n", cur);\
83  return AVERROR(EINVAL); \
84  } \
85  if ((ret = add_to_list(&list, fmt)) < 0) { \
86  unref_fn(&list); \
87  return ret; \
88  } \
89  \
90  cur = next; \
91  } \
92 } while (0)
93 
94 static int get_sample_rate(const char *samplerate)
95 {
96  int ret = strtol(samplerate, NULL, 0);
97  return FFMAX(ret, 0);
98 }
99 
101 {
102  AFormatContext *s = ctx->priv;
103 
107  get_sample_rate, 0, "sample rate");
110  "channel layout");
111 
112  return 0;
113 }
114 
116 {
117  AFormatContext *s = ctx->priv;
118  int ret;
119 
120  ret = ff_set_common_formats(ctx, s->formats ? s->formats :
122  if (ret < 0)
123  return ret;
126  if (ret < 0)
127  return ret;
130 }
131 
133  {
134  .name = "default",
135  .type = AVMEDIA_TYPE_AUDIO,
136  },
137  { NULL }
138 };
139 
141  {
142  .name = "default",
143  .type = AVMEDIA_TYPE_AUDIO
144  },
145  { NULL }
146 };
147 
149  .name = "aformat",
150  .description = NULL_IF_CONFIG_SMALL("Convert the input audio to one of the specified formats."),
151  .init = init,
152  .query_formats = query_formats,
153  .priv_size = sizeof(AFormatContext),
154  .priv_class = &aformat_class,
155  .inputs = avfilter_af_aformat_inputs,
156  .outputs = avfilter_af_aformat_outputs,
157 };
#define NULL
Definition: coverity.c:32
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates...
Definition: formats.c:581
AVOption.
Definition: opt.h:248
Main libavfilter public API header.
static const AVFilterPad avfilter_af_aformat_inputs[]
Definition: af_aformat.c:132
static int query_formats(AVFilterContext *ctx)
Definition: af_aformat.c:115
AVFilterFormats * sample_rates
Definition: af_aformat.c:40
const char * name
Pad name.
Definition: internal.h:60
uint64_t av_get_channel_layout(const char *name)
Return a channel layout id that matches name, or 0 if no match is found.
#define av_cold
Definition: attributes.h:88
AVOptions.
AVFilterFormats * ff_all_formats(enum AVMediaType type)
Return a list of all formats supported by FFmpeg for the given media type.
Definition: formats.c:349
A filter pad used for either input or output.
Definition: internal.h:54
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:600
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:342
#define F
Definition: af_aformat.c:50
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define PARSE_FORMATS(str, type, list, add_to_list, unref_fn, get_fmt, none, desc)
Definition: af_aformat.c:63
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:336
#define FFMAX(a, b)
Definition: common.h:94
static av_cold int init(AVFilterContext *ctx)
Definition: af_aformat.c:100
AVFilterFormats * formats
Definition: af_aformat.c:39
audio channel layout utility functions
#define A
Definition: af_aformat.c:49
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
#define OFFSET(x)
Definition: af_aformat.c:48
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
A list of supported channel layouts.
Definition: formats.h:85
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
AVFILTER_DEFINE_CLASS(aformat)
void ff_channel_layouts_unref(AVFilterChannelLayouts **ref)
Remove a reference to a channel layouts list.
Definition: formats.c:511
char * formats_str
Definition: af_aformat.c:43
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
enum AVSampleFormat av_get_sample_fmt(const char *name)
Return a sample format corresponding to name, or AV_SAMPLE_FMT_NONE on error.
Definition: samplefmt.c:56
void ff_formats_unref(AVFilterFormats **ref)
If *ref is non-NULL, remove *ref as a reference to the format list it currently points to...
Definition: formats.c:506
const char * name
Filter name.
Definition: avfilter.h:148
char * channel_layouts_str
Definition: af_aformat.c:45
char * sample_rates_str
Definition: af_aformat.c:44
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:425
common internal and external API header
AVFilterChannelLayouts * channel_layouts
Definition: af_aformat.c:41
AVFilter ff_af_aformat
Definition: af_aformat.c:148
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:338
static const AVFilterPad avfilter_af_aformat_outputs[]
Definition: af_aformat.c:140
static const AVOption aformat_options[]
Definition: af_aformat.c:51
static int get_sample_rate(const char *samplerate)
Definition: af_aformat.c:94
internal API functions
AVFilterChannelLayouts * ff_all_channel_counts(void)
Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition...
Definition: formats.c:440
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:588