af_aformat.c File Reference

#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	AFormatContext

Macros
#define	OFFSET(x)   offsetof(AFormatContext, x)
#define	A   AV_OPT_FLAG_AUDIO_PARAM
#define	F   AV_OPT_FLAG_FILTERING_PARAM
#define	PARSE_FORMATS(str, type, list, add_to_list, get_fmt, none, desc)

Functions
	AVFILTER_DEFINE_CLASS (aformat)
static int	get_sample_rate (const char *samplerate)
static int	parse_channel_layouts (AVFilterContext *ctx)
static av_cold int	init (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)

Variables
static const AVOption	aformat_options []
const AVFilter	ff_af_aformat

Detailed Description

format audio filter

Definition in file af_aformat.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(AFormatContext, x)

Definition at line 48 of file af_aformat.c.

A

#define A   AV_OPT_FLAG_AUDIO_PARAM

Definition at line 49 of file af_aformat.c.

F

#define F   AV_OPT_FLAG_FILTERING_PARAM

Definition at line 50 of file af_aformat.c.

PARSE_FORMATS

#define PARSE_FORMATS	(		str,
			type,
			list,
			add_to_list,
			get_fmt,
			none,
			desc
	)

Value:

do {                                                                        \
    char *next, *cur = str;                                                 \
    int ret;                                                                \
                                                                            \
    while (cur) {                                                           \
        type fmt;                                                           \
        next = strchr(cur, '|');                                            \
        if (next)                                                           \
            *next++ = 0;                                                    \
                                                                            \
        if ((fmt = get_fmt(cur)) == none) {                                 \
            av_log(ctx, AV_LOG_ERROR, "Error parsing " desc ": %s.\n", cur);\
            return AVERROR(EINVAL);                                         \
        }                                                                   \
        if ((ret = add_to_list(&list, fmt)) < 0) {                          \
            return ret;                                                     \
        }                                                                   \
                                                                            \
        cur = next;                                                         \
    }                                                                       \
} while (0)

Definition at line 63 of file af_aformat.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

aformat

)

get_sample_rate()

static int get_sample_rate ( const char *  samplerate )

static

Definition at line 86 of file af_aformat.c.

Referenced by init().

parse_channel_layouts()

static int parse_channel_layouts ( AVFilterContext *  ctx )

static

Definition at line 92 of file af_aformat.c.

Referenced by init().

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 120 of file af_aformat.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 136 of file af_aformat.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 145 of file af_aformat.c.

Variable Documentation

aformat_options

const AVOption aformat_options[]

static

Initial value:

= {
    { "sample_fmts",     "A '|'-separated list of sample formats.",  OFFSET(formats_str),         AV_OPT_TYPE_STRING, .flags = A|F },
    { "f",               "A '|'-separated list of sample formats.",  OFFSET(formats_str),         AV_OPT_TYPE_STRING, .flags = A|F },
    { "sample_rates",    "A '|'-separated list of sample rates.",    OFFSET(sample_rates_str),    AV_OPT_TYPE_STRING, .flags = A|F },
    { "r",               "A '|'-separated list of sample rates.",    OFFSET(sample_rates_str),    AV_OPT_TYPE_STRING, .flags = A|F },
    { "channel_layouts", "A '|'-separated list of channel layouts.", OFFSET(channel_layouts_str), AV_OPT_TYPE_STRING, .flags = A|F },
    { "cl",              "A '|'-separated list of channel layouts.", OFFSET(channel_layouts_str), AV_OPT_TYPE_STRING, .flags = A|F },
    { NULL }
}

Definition at line 51 of file af_aformat.c.

ff_af_aformat

const AVFilter ff_af_aformat

Initial value:

= {
    .name          = "aformat",
    .description   = NULL_IF_CONFIG_SMALL("Convert the input audio to one of the specified formats."),
    .init          = init,
    .uninit        = uninit,
    .priv_size     = sizeof(AFormatContext),
    .priv_class    = &aformat_class,
    .flags         = AVFILTER_FLAG_METADATA_ONLY,
    FILTER_INPUTS(ff_audio_default_filterpad),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_QUERY_FUNC(query_formats),
}

Definition at line 166 of file af_aformat.c.