audio_filter.h File Reference

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Classes
struct	audio_filter
struct	audio_filter_info

Macros
#define	AUDIO_FILTER_ABI_VERSION   3

Enumerations
enum	af_result_code {   AF_MISCONFIGURED = -2 , AF_FAILURE = -1 , AF_OK = 0 , AF_CONFIGURED_CLOSEST = 1 ,   AF_HELP_SHOWN = 2 }

Functions
enum af_result_code	audio_filter (struct audio_filter *state, struct audio_frame **frame)
enum af_result_code	audio_filter_configure (struct audio_filter *state, int bps, int ch_count, int sample_rate)
void	audio_filter_destroy (struct audio_filter *state)
void	audio_filter_get_configured_in (struct audio_filter *state, int *bps, int *ch_count, int *sample_rate)
void	audio_filter_get_configured_out (struct audio_filter *state, int *bps, int *ch_count, int *sample_rate)
enum af_result_code	audio_filter_init (struct module *parent, const char *name, const char *cfg, struct audio_filter *filter)

Detailed Description

Author

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

Definition in file audio_filter.h.

Macro Definition Documentation

AUDIO_FILTER_ABI_VERSION

#define AUDIO_FILTER_ABI_VERSION   3

Definition at line 41 of file audio_filter.h.

Referenced by audio_filter_init().

Enumeration Type Documentation

af_result_code

enum af_result_code

Enumerator
AF_MISCONFIGURED
AF_FAILURE
AF_OK
AF_CONFIGURED_CLOSEST
AF_HELP_SHOWN

Definition at line 50 of file audio_filter.h.

                   {
        AF_MISCONFIGURED = -2,
        AF_FAILURE = -1,
        AF_OK = 0,
        AF_CONFIGURED_CLOSEST = 1,
        AF_HELP_SHOWN = 2,
};

Function Documentation

audio_filter()

enum af_result_code audio_filter	(	struct audio_filter *	state,
		struct audio_frame **	frame )

Definition at line 87 of file audio_filter.cpp.

                                                                                   {
        return state->info->filter(state->state, frame);
}

References frame, and state.

Referenced by Filter_chain::filter().

audio_filter_configure()

enum af_result_code audio_filter_configure	(	struct audio_filter *	state,
		int	bps,
		int	ch_count,
		int	sample_rate )

Definition at line 91 of file audio_filter.cpp.

{
        return state->info->configure(state->state, bps, ch_count, sample_rate);
}

References sample_rate, and state.

Referenced by Filter_chain::reconfigure().

audio_filter_destroy()

void audio_filter_destroy

(

struct audio_filter *

state

)

Definition at line 77 of file audio_filter.cpp.

                                                     {
        if(!state->state)
                return;
 
        state->info->done(state->state);
 
        state->info = {};
        state->state = {};
}

References state.

Referenced by Filter_chain::clear().

audio_filter_get_configured_in()

void audio_filter_get_configured_in	(	struct audio_filter *	state,
		int *	bps,
		int *	ch_count,
		int *	sample_rate )

Definition at line 103 of file audio_filter.cpp.

{
        return state->info->get_configured_in(state->state, bps, ch_count, sample_rate);
}

References sample_rate, and state.

audio_filter_get_configured_out()

void audio_filter_get_configured_out	(	struct audio_filter *	state,
		int *	bps,
		int *	ch_count,
		int *	sample_rate )

Definition at line 97 of file audio_filter.cpp.

{
        return state->info->get_configured_out(state->state, bps, ch_count, sample_rate);
}

References sample_rate, and state.

Referenced by Filter_chain::reconfigure().

audio_filter_init()

enum af_result_code audio_filter_init	(	struct module *	parent,
		const char *	name,
		const char *	cfg,
		struct audio_filter *	filter )

Definition at line 53 of file audio_filter.cpp.

{
        const auto filters = get_libraries_for_class(LIBRARY_CLASS_AUDIO_FILTER,
                        AUDIO_FILTER_ABI_VERSION);
 
        for(const auto& i : filters){
                auto funcs = static_cast<const audio_filter_info *>(i.second);
                if(strcasecmp(i.first.c_str(), name) == 0){
                        filter->info = funcs;
 
                        af_result_code ret = funcs->init(parent, cfg, &filter->state);
                        if(ret == AF_FAILURE) {
                                log_msg(LOG_LEVEL_ERROR, "Unable to initialize filter: %s\n",
                                                name);
                        }
                        return ret;
                }
        }
 
        log_msg(LOG_LEVEL_ERROR, "Unable to find capture filter: %s\n", name);
        return AF_FAILURE;
}

References AF_FAILURE, AUDIO_FILTER_ABI_VERSION, filter(), get_libraries_for_class(), LIBRARY_CLASS_AUDIO_FILTER, LOG_LEVEL_ERROR, log_msg(), name, and parent.

Referenced by Filter_chain::emplace_new().

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