CELT format attribute interface. More...

#include "asterisk.h"
#include <ctype.h>
#include "asterisk/module.h"
#include "asterisk/format.h"
#include "asterisk/astobj2.h"
#include "asterisk/logger.h"
#include "asterisk/strings.h"
#include "asterisk/utils.h"

Include dependency graph for res_format_attr_celt.c:

Go to the source code of this file.

Data Structures
struct	celt_attr
	CELT attribute structure. More...

Functions
static void	__reg_module (void)

static void	__unreg_module (void)

struct ast_module *	AST_MODULE_SELF_SYM (void)

static int	celt_clone (const struct ast_format src, struct ast_format dst)

static enum ast_format_cmp_res	celt_cmp (const struct ast_format format1, const struct ast_format format2)

static void	celt_destroy (struct ast_format *format)

static void	celt_generate_sdp_fmtp (const struct ast_format format, unsigned int payload, struct ast_str *str)

static struct ast_format *	celt_getjoint (const struct ast_format format1, const struct ast_format format2)

static struct ast_format *	celt_parse_sdp_fmtp (const struct ast_format format, const char attributes)

static struct ast_format *	celt_set (const struct ast_format format, const char name, const char *value)

static int	load_module (void)

static int	unload_module (void)

Variables
static struct ast_module_info	__mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "CELT Format Attribute Module" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_CHANNEL_DEPEND, }

static const struct ast_module_info *	ast_module_info = &__mod_info

static struct ast_format_interface	celt_interface

Detailed Description

CELT format attribute interface.

Author: David Vossel dvoss.nosp@m.el@d.nosp@m.igium.nosp@m..com

Definition in file res_format_attr_celt.c.

Function Documentation

◆ __reg_module()

static void __reg_module ( void )

static

Definition at line 216 of file res_format_attr_celt.c.

◆ __unreg_module()

static void __unreg_module ( void )

static

Definition at line 216 of file res_format_attr_celt.c.

◆ AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM ( void )

Definition at line 216 of file res_format_attr_celt.c.

◆ celt_clone()

static int celt_clone	(	const struct ast_format *	src,
		struct ast_format *	dst
	)

static

Definition at line 59 of file res_format_attr_celt.c.

{
    struct celt_attr *original = ast_format_get_attribute_data(src);
    struct celt_attr *attr = ast_calloc(1, sizeof(*attr));
 
    if (!attr) {
        return -1;
    }
 
    if (original) {
        *attr = *original;
    }
 
    ast_format_set_attribute_data(dst, attr);
 
    return 0;
}

References ast_calloc, ast_format_get_attribute_data(), and ast_format_set_attribute_data().

◆ celt_cmp()

static enum ast_format_cmp_res celt_cmp	(	const struct ast_format *	format1,
		const struct ast_format *	format2
	)

static

Definition at line 113 of file res_format_attr_celt.c.

{
    struct celt_attr *attr1 = ast_format_get_attribute_data(format1);
    struct celt_attr *attr2 = ast_format_get_attribute_data(format2);
 
    if (((!attr1 || !attr1->samplerate) && (!attr2 || !attr2->samplerate)) ||
        (attr1->samplerate == attr2->samplerate)) {
        return AST_FORMAT_CMP_EQUAL;
    }
 
    return AST_FORMAT_CMP_NOT_EQUAL;
}

References AST_FORMAT_CMP_EQUAL, AST_FORMAT_CMP_NOT_EQUAL, ast_format_get_attribute_data(), and celt_attr::samplerate.

◆ celt_destroy()

static void celt_destroy ( struct ast_format * format )

static

Definition at line 52 of file res_format_attr_celt.c.

{
    struct celt_attr *attr = ast_format_get_attribute_data(format);
 
    ast_free(attr);
}

References ast_format_get_attribute_data(), and ast_free.

◆ celt_generate_sdp_fmtp()

static void celt_generate_sdp_fmtp	(	const struct ast_format *	format,
		unsigned int	payload,
		struct ast_str **	str
	)

static

Definition at line 102 of file res_format_attr_celt.c.

{
    struct celt_attr *attr = ast_format_get_attribute_data(format);
 
    if (!attr || !attr->framesize) {
        return;
    }
 
    ast_str_append(str, 0, "a=fmtp:%u framesize=%u\r\n", payload, attr->framesize);
}

References ast_format_get_attribute_data(), ast_str_append(), celt_attr::framesize, and str.

◆ celt_getjoint()

static struct ast_format * celt_getjoint	(	const struct ast_format *	format1,
		const struct ast_format *	format2
	)

static

Definition at line 126 of file res_format_attr_celt.c.

{
    struct celt_attr *attr1 = ast_format_get_attribute_data(format1);
    struct celt_attr *attr2 = ast_format_get_attribute_data(format2);
    struct ast_format *jointformat;
    struct celt_attr *jointattr;
 
    if (attr1 && attr2 && (attr1->samplerate != attr2->samplerate)) {
        return NULL;
    }
 
    jointformat = ast_format_clone(format1);
    if (!jointformat) {
        return NULL;
    }
    jointattr = ast_format_get_attribute_data(jointformat);
 
    /* either would work, they are guaranteed the same at this point. */
    jointattr->samplerate = attr1->samplerate;
    /* Take the lowest max bitrate */
    jointattr->maxbitrate = MIN(attr1->maxbitrate, attr2->maxbitrate);
 
    jointattr->framesize = attr2->framesize; /* TODO figure out what joint framesize means */
 
    return jointformat;
}

References ast_format_clone(), ast_format_get_attribute_data(), celt_attr::framesize, celt_attr::maxbitrate, MIN, NULL, and celt_attr::samplerate.

◆ celt_parse_sdp_fmtp()

static struct ast_format * celt_parse_sdp_fmtp	(	const struct ast_format *	format,
		const char *	attributes
	)

static

Definition at line 77 of file res_format_attr_celt.c.

{
    char *attribs = ast_strdupa(attributes), *attrib;
    struct ast_format *cloned;
    struct celt_attr *attr;
    unsigned int val;
 
    cloned = ast_format_clone(format);
    if (!cloned) {
        return NULL;
    }
    attr = ast_format_get_attribute_data(cloned);
 
    /* lower-case everything, so we are case-insensitive */
    for (attrib = attribs; *attrib; ++attrib) {
        *attrib = tolower(*attrib);
    } /* based on channels/chan_sip.c:process_a_sdp_image() */
 
    if (sscanf(attribs, "framesize=%30u", &val) == 1) {
        attr->framesize = val;
    }
 
    return cloned;
}

References ast_format_clone(), ast_format_get_attribute_data(), ast_strdupa, celt_attr::framesize, and NULL.

◆ celt_set()

static struct ast_format * celt_set	(	const struct ast_format *	format,
		const char *	name,
		const char *	value
	)

static

Definition at line 153 of file res_format_attr_celt.c.

{
    struct ast_format *cloned;
    struct celt_attr *attr;
    unsigned int val;
 
    cloned = ast_format_clone(format);
    if (!cloned) {
        return NULL;
    }
    attr = ast_format_get_attribute_data(cloned);
 
    if (sscanf(value, "%30u", &val) != 1) {
        ast_log(LOG_WARNING, "Unknown value '%s' for attribute type '%s'\n",
            value, name);
        ao2_ref(cloned, -1);
        return NULL;
    }
 
    if (!strcasecmp(name, "sample_rate")) {
        attr->samplerate = val;
    } else if (!strcasecmp(name, "max_bitrate")) {
        attr->maxbitrate = val;
    } else if (!strcasecmp(name, "frame_size")) {
        attr->framesize = val;
    } else {
        ast_log(LOG_WARNING, "Unknown attribute type '%s'\n", name);
        ao2_ref(cloned, -1);
        return NULL;
    }
 
    return cloned;
}

References ao2_ref, ast_format_clone(), ast_format_get_attribute_data(), ast_log, celt_attr::framesize, LOG_WARNING, celt_attr::maxbitrate, name, NULL, celt_attr::samplerate, and value.

◆ load_module()

static int load_module ( void )

static

Definition at line 197 of file res_format_attr_celt.c.

{
    if (ast_format_interface_register("celt", &celt_interface)) {
        return AST_MODULE_LOAD_DECLINE;
    }
 
    return AST_MODULE_LOAD_SUCCESS;
}

References ast_format_interface_register, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, and celt_interface.

◆ unload_module()

static int unload_module ( void )

static

Definition at line 206 of file res_format_attr_celt.c.

{
    return 0;
}

Variable Documentation

◆ __mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "CELT Format Attribute Module" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_CHANNEL_DEPEND, }

static

Definition at line 216 of file res_format_attr_celt.c.

◆ ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info

static

Definition at line 216 of file res_format_attr_celt.c.

◆ celt_interface

struct ast_format_interface celt_interface

static

Definition at line 187 of file res_format_attr_celt.c.

                                                    {
    .format_destroy = celt_destroy,
    .format_clone = celt_clone,
    .format_cmp = celt_cmp,
    .format_get_joint = celt_getjoint,
    .format_attribute_set = celt_set,
    .format_parse_sdp_fmtp = celt_parse_sdp_fmtp,
    .format_generate_sdp_fmtp = celt_generate_sdp_fmtp,
};

Referenced by load_module().

Data Structures

Functions

Variables

Detailed Description

Function Documentation

◆ __reg_module()

◆ __unreg_module()

◆ AST_MODULE_SELF_SYM()

◆ celt_clone()

◆ celt_cmp()

◆ celt_destroy()

◆ celt_generate_sdp_fmtp()

◆ celt_getjoint()

◆ celt_parse_sdp_fmtp()

◆ celt_set()

◆ load_module()

◆ unload_module()

Variable Documentation

◆ __mod_info

◆ ast_module_info

◆ celt_interface