discard.cpp File Reference

#include <memory>
#include <string_view>
#include "debug.h"
#include "module.h"
#include "audio/audio_filter.h"
#include "audio/types.h"
#include "audio/utils.h"
#include "lib_common.h"

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Classes
struct	state_discard

Functions
static af_result_code	configure (void *state, int in_bps, int in_ch_count, int in_sample_rate)
static void	done (void *state)
static af_result_code	filter (void *state, struct audio_frame **frame)
static void	get_configured (void *state, int *bps, int *ch_count, int *sample_rate)
static af_result_code	init (struct module *parent, const char *cfg, void **state)
	REGISTER_HIDDEN_MODULE (discard, &audio_filter_discard, LIBRARY_CLASS_AUDIO_FILTER, AUDIO_FILTER_ABI_VERSION)
static void	usage ()

Variables
static const struct audio_filter_info	audio_filter_discard

Detailed Description

Author

Martin Piatka piatk.nosp@m.a@ce.nosp@m.snet..nosp@m.cz

Definition in file discard.cpp.

Function Documentation

configure()

static af_result_code configure ( void * state, int in_bps, int in_ch_count, int in_sample_rate )

static

Definition at line 83 of file discard.cpp.

{
        auto s = static_cast<state_discard *>(state);
 
        s->bps = in_bps;
        s->ch_count = in_ch_count;
        s->sample_rate = in_sample_rate;
 
        return AF_OK;
}

References AF_OK, state_discard::bps, and state.

Referenced by filter().

done()

static void done ( void * state )

static

Definition at line 95 of file discard.cpp.

                             {
        auto s = static_cast<state_discard *>(state);
 
        delete s;
}

References state.

filter()

static af_result_code filter ( void * state, struct audio_frame ** frame )

static

Definition at line 111 of file discard.cpp.

                                                                     {
        auto s = static_cast<state_discard *>(state);
 
        auto f = *frame;
 
        if(f->bps != s->bps || f->ch_count != s->ch_count){
                if(configure(state, f->bps, f->ch_count, f->sample_rate) != AF_OK){
                        return AF_MISCONFIGURED;
                }
        }
 
        *frame = nullptr;
 
        return AF_OK;
}

References AF_MISCONFIGURED, AF_OK, configure(), frame, and state.

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get_configured()

static void get_configured ( void * state, int * bps, int * ch_count, int * sample_rate )

static

Definition at line 101 of file discard.cpp.

{
        auto s = static_cast<state_discard *>(state);
 
        if(bps) *bps = s->bps;
        if(ch_count) *ch_count = s->ch_count;
        if(sample_rate) *sample_rate = s->sample_rate;
}

References state_discard::bps, sample_rate, and state.

init()

static af_result_code init ( struct module * parent, const char * cfg, void ** state )

static

Definition at line 71 of file discard.cpp.

                                                                                {
        auto s = std::make_unique<state_discard>(parent);
 
        if(strcmp(cfg, "help") == 0){
                usage();
                return AF_HELP_SHOWN;
        }
 
        *state = s.release();
        return AF_OK;
};

References AF_HELP_SHOWN, AF_OK, parent, state, and usage().

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REGISTER_HIDDEN_MODULE()

REGISTER_HIDDEN_MODULE	(	discard	,
		&	audio_filter_discard,
		LIBRARY_CLASS_AUDIO_FILTER	,
		AUDIO_FILTER_ABI_VERSION	)

usage()

static void usage ( void )

static

Definition at line 66 of file discard.cpp.

                   {
        printf("discard:\n");
        printf("Discards all audio frames\n");
}

Referenced by init().

Variable Documentation

audio_filter_discard

const struct audio_filter_info audio_filter_discard

static

Initial value:

= {
        .name = "discard",
        .init = init,
        .done = done,
        .configure = configure,
        .get_configured_in = get_configured,
        .get_configured_out = get_configured,
        .filter = filter,
}

Definition at line 127 of file discard.cpp.

                                                             {
        .name = "discard",
        .init = init,
        .done = done,
        .configure = configure,
        .get_configured_in = get_configured,
        .get_configured_out = get_configured,
        .filter = filter,
};