audio_capture.c File Reference

#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "debug.h"
#include "host.h"
#include "audio/audio_capture.h"
#include "audio/capture/sdi.h"
#include "audio/types.h"
#include "video_capture.h"
#include "lib_common.h"

Include dependency graph for audio_capture.c:

Go to the source code of this file.

Classes
struct	state_audio_capture

Functions
void	audio_capture_done (struct state_audio_capture *s)
const char *	audio_capture_get_driver_name (struct state_audio_capture *s)
void *	audio_capture_get_state_pointer (struct state_audio_capture *s)
unsigned int	audio_capture_get_vidcap_flags (const char *const_device_name)
int	audio_capture_get_vidcap_index (const char *const_device_name)
int	audio_capture_init (struct module *parent, const char *driver, const char *cfg, struct state_audio_capture **state)
struct state_audio_capture *	audio_capture_init_null_device ()
void	audio_capture_print_help (bool full)
struct audio_frame *	audio_capture_read (struct state_audio_capture *s)

Detailed Description

Author

Martin Pulec pulec.nosp@m.@ces.nosp@m.net.c.nosp@m.z

Definition in file audio_capture.c.

Function Documentation

audio_capture_done()

void audio_capture_done

(

struct state_audio_capture *

s

)

Definition at line 118 of file audio_capture.c.

{
        if(s) {
                s->funcs->done(s->state);
 
                free(s);
        }
}

References audio_capture_info::done, state_audio_capture::funcs, and state_audio_capture::state.

Referenced by audio_done().

audio_capture_get_driver_name()

const char * audio_capture_get_driver_name

(

struct state_audio_capture *

s

)

Definition at line 188 of file audio_capture.c.

{
        return s->name;
}

References state_audio_capture::name.

Referenced by audio_sdi_send().

audio_capture_get_state_pointer()

void * audio_capture_get_state_pointer

(

struct state_audio_capture *

s

)

returns directly state of audio capture device. Little bit silly, but it is needed for SDI (embedded sound).

Definition at line 193 of file audio_capture.c.

{
        return s->state;
}

References state_audio_capture::state.

Referenced by audio_sdi_send().

audio_capture_get_vidcap_flags()

unsigned int audio_capture_get_vidcap_flags

(

const char *

const_device_name

)

Returns

vidcap flags if audio should be taken from video capture device.

Definition at line 140 of file audio_capture.c.

{
        char *tmp = strdup(const_device_name);
        assert(tmp != NULL);
        char *save_ptr = NULL;
        char *device_name = strtok_r(tmp, ":", &save_ptr);
        assert(device_name != NULL);
        unsigned int ret;
 
        if(strcasecmp(device_name, "embedded") == 0) {
                ret = VIDCAP_FLAG_AUDIO_EMBEDDED;
        } else if(strcasecmp(device_name, "AESEBU") == 0) {
                ret = VIDCAP_FLAG_AUDIO_AESEBU;
        } else if(strcasecmp(device_name, "analog") == 0) {
                ret = VIDCAP_FLAG_AUDIO_ANALOG;
        } else {
                ret = 0u;
        }
 
        free(tmp);
        return ret;
}

References VIDCAP_FLAG_AUDIO_AESEBU, VIDCAP_FLAG_AUDIO_ANALOG, and VIDCAP_FLAG_AUDIO_EMBEDDED.

Referenced by audio_sdi_send(), and parse_audio_capture().

audio_capture_get_vidcap_index()

int audio_capture_get_vidcap_index

(

const char *

const_device_name

)

Returns

optional index to video capture device to which should be audio flags passed.

See also

audio_capture_get_vidcap_flags

Definition at line 168 of file audio_capture.c.

{
        char *tmp = strdup(const_device_name);
        assert(tmp != NULL);
        char *save_ptr = NULL;
        unsigned int ret;
 
        strtok_r(tmp, ":", &save_ptr);
        char *vidcap_index_str = strtok_r(NULL, ":", &save_ptr);
 
        if (vidcap_index_str == NULL) {
                ret = -1;
        } else {
                ret = atoi(vidcap_index_str);
        }
 
        free(tmp);
        return ret;
}

audio_capture_init()

int audio_capture_init	(	struct module *	parent,
		const char *	driver,
		const char *	cfg,
		struct state_audio_capture **	state )

See also

display_init

Definition at line 67 of file audio_capture.c.

{
        assert(cfg != NULL);
        struct state_audio_capture *s = calloc(1, sizeof(struct state_audio_capture));
        assert(s != NULL);
 
        s->funcs = load_library(driver, LIBRARY_CLASS_AUDIO_CAPTURE, AUDIO_CAPTURE_ABI_VERSION);
 
        if (s->funcs == NULL) {
                log_msg(LOG_LEVEL_ERROR, "Unknown audio capture driver: %s\n", driver);
                goto error;
        }
 
        strncpy(s->name, driver, sizeof s->name - 1);
 
        s->state = s->funcs->init(parent, cfg);
 
        if(!s->state) {
                log_msg(LOG_LEVEL_ERROR, "Error initializing audio capture.\n");
                goto error;
        }
 
        if(s->state == INIT_NOERR) {
                free(s);
                return 1;
        }
 
        *state = s;
        return 0;
 
error:
        free(s);
        return -1;
}

References AUDIO_CAPTURE_ABI_VERSION, state_audio_capture::funcs, audio_capture_info::init, INIT_NOERR, LIBRARY_CLASS_AUDIO_CAPTURE, load_library(), LOG_LEVEL_ERROR, log_msg(), state_audio_capture::name, parent, state, and state_audio_capture::state.

Referenced by audio_capture_init_null_device(), and audio_init().

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audio_capture_init_null_device()

struct state_audio_capture * audio_capture_init_null_device

(

void

)

Definition at line 102 of file audio_capture.c.

{
        struct state_audio_capture *device = NULL;
        int ret = audio_capture_init(NULL, "none", "", &device);
        if (ret != 0) {
                log_msg(LOG_LEVEL_ERROR, "Unable to initialize null audio capture: %d\n", ret);
        }
        return device;
}

References audio_capture_init(), LOG_LEVEL_ERROR, and log_msg().

Referenced by audio_init().

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audio_capture_print_help()

void audio_capture_print_help

(

bool

full

)

Definition at line 112 of file audio_capture.c.

{
        printf("Available audio capture devices:\n");
        list_modules(LIBRARY_CLASS_AUDIO_CAPTURE, AUDIO_CAPTURE_ABI_VERSION, full);
}

References AUDIO_CAPTURE_ABI_VERSION, LIBRARY_CLASS_AUDIO_CAPTURE, and list_modules().

Referenced by parse_audio_capture().

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audio_capture_read()

struct audio_frame * audio_capture_read

(

struct state_audio_capture *

s

)

Definition at line 127 of file audio_capture.c.

{
        if(s) {
                return s->funcs->read(s->state);
        } else {
                return NULL;
        }
}

References state_audio_capture::funcs, audio_capture_info::read, and state_audio_capture::state.

Referenced by audio_sender_thread().