af_asr.c File Reference

#include <pocketsphinx/pocketsphinx.h>
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"

Go to the source code of this file.

Data Structures
struct	ASRContext

Macros
#define	OFFSET(x)   offsetof(ASRContext, x)
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM

Functions
	AVFILTER_DEFINE_CLASS (asr)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	config_input (AVFilterLink *inlink)
static av_cold int	asr_init (AVFilterContext *ctx)
static int	query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
static av_cold void	asr_uninit (AVFilterContext *ctx)

Variables
static const AVOption	asr_options []
static const AVFilterPad	asr_inputs []
const AVFilter	ff_af_asr

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(ASRContext, x)

Definition at line 49 of file af_asr.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM

Definition at line 50 of file af_asr.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

asr

)

filter_frame()

static int filter_frame ( AVFilterLink *  inlink, AVFrame *  in  )

static

Definition at line 64 of file af_asr.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 88 of file af_asr.c.

asr_init()

static av_cold int asr_init ( AVFilterContext *  ctx )

static

Definition at line 98 of file af_asr.c.

query_formats()

static int query_formats ( const AVFilterContext *  ctx, AVFilterFormatsConfig **  cfg_in, AVFilterFormatsConfig **  cfg_out  )

static

Definition at line 125 of file af_asr.c.

asr_uninit()

static av_cold void asr_uninit ( AVFilterContext *  ctx )

static

Definition at line 157 of file af_asr.c.

Variable Documentation

asr_options

const AVOption asr_options[]

static

Initial value:

= {
    { "rate",  "set sampling rate",                             OFFSET(rate),   AV_OPT_TYPE_INT,    {.i64=16000}, 0, INT_MAX, .flags = FLAGS },
    { "hmm",   "set directory containing acoustic model files", OFFSET(hmm),    AV_OPT_TYPE_STRING, {.str=NULL},              .flags = FLAGS },
    { "dict",  "set pronunciation dictionary",                  OFFSET(dict),   AV_OPT_TYPE_STRING, {.str=NULL},              .flags = FLAGS },
    { "lm",    "set language model file",                       OFFSET(lm),     AV_OPT_TYPE_STRING, {.str=NULL},              .flags = FLAGS },
    { "lmctl", "set language model set",                        OFFSET(lmctl),  AV_OPT_TYPE_STRING, {.str=NULL},              .flags = FLAGS },
    { "lmname","set which language model to use",               OFFSET(lmname), AV_OPT_TYPE_STRING, {.str=NULL},              .flags = FLAGS },
    { "logfn", "set output for log messages",                   OFFSET(logfn),  AV_OPT_TYPE_STRING, {.str="/dev/null"},       .flags = FLAGS },
    { NULL }
}

Definition at line 51 of file af_asr.c.

asr_inputs

const AVFilterPad asr_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .filter_frame = filter_frame,
        .config_props = config_input,
    },
}

Definition at line 167 of file af_asr.c.

ff_af_asr

const AVFilter ff_af_asr

Initial value:

= {
    .name          = "asr",
    .description   = NULL_IF_CONFIG_SMALL("Automatic Speech Recognition."),
    .priv_size     = sizeof(ASRContext),
    .priv_class    = &asr_class,
    .init          = asr_init,
    .uninit        = asr_uninit,
    .flags         = AVFILTER_FLAG_METADATA_ONLY,
    FILTER_INPUTS(asr_inputs),
    FILTER_OUTPUTS(ff_audio_default_filterpad),
    FILTER_QUERY_FUNC2(query_formats),
}

Definition at line 176 of file af_asr.c.