af_ladspa.c File Reference

#include <dlfcn.h>
#include <ladspa.h>
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	LADSPAContext

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

Functions
	AVFILTER_DEFINE_CLASS (ladspa)
static int	find_latency (AVFilterContext *ctx, LADSPAContext *s)
static void	print_ctl_info (AVFilterContext *ctx, int level, LADSPAContext *s, int ctl, unsigned long *map, LADSPA_Data *values, int print)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	request_frame (AVFilterLink *outlink)
static void	set_default_ctl_value (LADSPAContext *s, int ctl, unsigned long *map, LADSPA_Data *values)
static int	connect_ports (AVFilterContext *ctx, AVFilterLink *link)
static int	config_input (AVFilterLink *inlink)
static int	config_output (AVFilterLink *outlink)
static void	count_ports (const LADSPA_Descriptor *desc, unsigned long *nb_inputs, unsigned long *nb_outputs)
static void *	try_load (const char *dir, const char *soname)
static int	set_control (AVFilterContext *ctx, unsigned long port, LADSPA_Data value)
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)

Variables
static const AVOption	ladspa_options []
static const AVFilterPad	ladspa_outputs []
const AVFilter	ff_af_ladspa

Detailed Description

LADSPA wrapper

Definition in file af_ladspa.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(LADSPAContext, x)

Definition at line 72 of file af_ladspa.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM

Definition at line 73 of file af_ladspa.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

ladspa

)

find_latency()

static int find_latency ( AVFilterContext *  ctx, LADSPAContext *  s  )

static

Definition at line 94 of file af_ladspa.c.

Referenced by filter_frame().

print_ctl_info()

static void print_ctl_info ( AVFilterContext *  ctx, int  level, LADSPAContext *  s, int  ctl, unsigned long *  map, LADSPA_Data *  values, int  print  )

static

Definition at line 109 of file af_ladspa.c.

Referenced by filter_frame(), init(), and request_frame().

filter_frame()

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

static

Definition at line 161 of file af_ladspa.c.

Referenced by init(), and request_frame().

request_frame()

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 233 of file af_ladspa.c.

set_default_ctl_value()

static void set_default_ctl_value ( LADSPAContext *  s, int  ctl, unsigned long *  map, LADSPA_Data *  values  )

static

Definition at line 279 of file af_ladspa.c.

Referenced by init().

connect_ports()

static int connect_ports ( AVFilterContext *  ctx, AVFilterLink *  link  )

static

Definition at line 316 of file af_ladspa.c.

Referenced by config_input(), and config_output().

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 350 of file af_ladspa.c.

Referenced by init().

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 357 of file af_ladspa.c.

count_ports()

static void count_ports ( const LADSPA_Descriptor *  desc, unsigned long *  nb_inputs, unsigned long *  nb_outputs  )

static

Definition at line 384 of file af_ladspa.c.

Referenced by init().

try_load()

static void* try_load ( const char *  dir, const char *  soname  )

static

Definition at line 403 of file af_ladspa.c.

Referenced by init().

set_control()

static int set_control ( AVFilterContext *  ctx, unsigned long  port, LADSPA_Data  value  )

static

Definition at line 416 of file af_ladspa.c.

Referenced by init(), and process_command().

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 450 of file af_ladspa.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 655 of file af_ladspa.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 728 of file af_ladspa.c.

process_command()

static int process_command ( AVFilterContext *  ctx, const char *  cmd, const char *  args, char *  res, int  res_len, int  flags  )

static

Definition at line 753 of file af_ladspa.c.

Variable Documentation

ladspa_options

const AVOption ladspa_options[]

static

Initial value:

= {
    { "file", "set library name or full path", OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
    { "f",    "set library name or full path", OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
    { "plugin", "set plugin name", OFFSET(plugin), AV_OPT_TYPE_STRING, .flags = FLAGS },
    { "p",      "set plugin name", OFFSET(plugin), AV_OPT_TYPE_STRING, .flags = FLAGS },
    { "controls", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
    { "c",        "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
    { "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
    { "s",           "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
    { "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
    { "n",          "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
    { "duration", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
    { "d",        "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
    { "latency", "enable latency compensation", OFFSET(latency), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
    { "l",       "enable latency compensation", OFFSET(latency), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
    { NULL }
}

Definition at line 74 of file af_ladspa.c.

ladspa_outputs

const AVFilterPad ladspa_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_AUDIO,
        .config_props  = config_output,
        .request_frame = request_frame,
    },
}

Definition at line 765 of file af_ladspa.c.

ff_af_ladspa

const AVFilter ff_af_ladspa

Initial value:

= {
    .name          = "ladspa",
    .description   = NULL_IF_CONFIG_SMALL("Apply LADSPA effect."),
    .priv_size     = sizeof(LADSPAContext),
    .priv_class    = &ladspa_class,
    .init          = init,
    .uninit        = uninit,
    .process_command = process_command,
    .inputs        = 0,
    FILTER_OUTPUTS(ladspa_outputs),
    FILTER_QUERY_FUNC(query_formats),
    .flags         = AVFILTER_FLAG_DYNAMIC_INPUTS,
}

Definition at line 774 of file af_ladspa.c.