CELT format attribute interface. More...

#include "asterisk.h"
#include "asterisk/module.h"
#include "asterisk/format.h"

Include dependency graph for res_format_attr_celt.c:

Data Structures
struct	celt_attr
	CELT attribute structure. More...
Functions
static void	__reg_module (void)
static void	__unreg_module (void)
static enum ast_format_cmp_res	celt_cmp (const struct ast_format_attr fattr1, const struct ast_format_attr fattr2)
static int	celt_get_val (const struct ast_format_attr fattr, int key, void result)
static int	celt_getjoint (const struct ast_format_attr fattr1, const struct ast_format_attr fattr2, struct ast_format_attr *result)
static int	celt_isset (const struct ast_format_attr *fattr, va_list ap)
static void	celt_sdp_generate (const struct ast_format_attr format_attr, unsigned int payload, struct ast_str *str)
static int	celt_sdp_parse (struct ast_format_attr format_attr, const char attributes)
static void	celt_set (struct ast_format_attr *fattr, va_list ap)
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 = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_CHANNEL_DEPEND, }
static struct ast_module_info *	ast_module_info = &__mod_info
static struct ast_format_attr_interface	celt_interface

Detailed Description

CELT format attribute interface.

Author:: David Vossel <dvossel@digium.com>

Definition in file res_format_attr_celt.c.

Function Documentation

static void __reg_module ( void ) [static]

Definition at line 210 of file res_format_attr_celt.c.

static void __unreg_module ( void ) [static]

Definition at line 210 of file res_format_attr_celt.c.

static enum ast_format_cmp_res celt_cmp	(	const struct ast_format_attr *	fattr1,
		const struct ast_format_attr *	fattr2
	)		`[static]`

Definition at line 71 of file res_format_attr_celt.c.

References AST_FORMAT_CMP_EQUAL, AST_FORMAT_CMP_NOT_EQUAL, and celt_attr::samplerate.

{
   struct celt_attr *attr1 = (struct celt_attr *) fattr1;
   struct celt_attr *attr2 = (struct celt_attr *) fattr2;

   if (attr1->samplerate == attr2->samplerate) {
      return AST_FORMAT_CMP_EQUAL;
   }
   return AST_FORMAT_CMP_NOT_EQUAL;
}

static int celt_get_val	(	const struct ast_format_attr *	fattr,
		int	key,
		void *	result
	)		`[static]`

Definition at line 82 of file res_format_attr_celt.c.

References ast_log(), CELT_ATTR_KEY_FRAME_SIZE, CELT_ATTR_KEY_MAX_BITRATE, CELT_ATTR_KEY_SAMP_RATE, celt_attr::framesize, LOG_WARNING, celt_attr::maxbitrate, and celt_attr::samplerate.

{
   const struct celt_attr *attr = (struct celt_attr *) fattr;
   int *val = result;

   switch (key) {
   case CELT_ATTR_KEY_SAMP_RATE:
      *val = attr->samplerate;
      break;
   case CELT_ATTR_KEY_MAX_BITRATE:
      *val = attr->maxbitrate;
      break;
   case CELT_ATTR_KEY_FRAME_SIZE:
      *val = attr->framesize;
      break;
   default:
      ast_log(LOG_WARNING, "unknown attribute type %d\n", key);
      return -1;
   }
   return 0;
}

static int celt_getjoint	(	const struct ast_format_attr *	fattr1,
		const struct ast_format_attr *	fattr2,
		struct ast_format_attr *	result
	)		`[static]`

Definition at line 136 of file res_format_attr_celt.c.

References celt_attr::framesize, celt_attr::maxbitrate, MIN, and celt_attr::samplerate.

{
   struct celt_attr *attr1 = (struct celt_attr *) fattr1;
   struct celt_attr *attr2 = (struct celt_attr *) fattr2;
   struct celt_attr *attr_res = (struct celt_attr *) result;

   /* sample rate is the only attribute that has any bearing on if joint capabilities exist or not */
   if (attr1->samplerate != attr2->samplerate) {
      return -1;
   }
   /* either would work, they are guaranteed the same at this point. */
   attr_res->samplerate = attr1->samplerate;
   /* Take the lowest max bitrate */
   attr_res->maxbitrate = MIN(attr1->maxbitrate, attr2->maxbitrate);

   attr_res->framesize = attr2->framesize; /* TODO figure out what joint framesize means */
   return 0;
}

static int celt_isset	(	const struct ast_format_attr *	fattr,
		va_list	ap
	)		`[static]`

Definition at line 104 of file res_format_attr_celt.c.

References AST_FORMAT_ATTR_END, ast_log(), CELT_ATTR_KEY_FRAME_SIZE, CELT_ATTR_KEY_MAX_BITRATE, CELT_ATTR_KEY_SAMP_RATE, celt_attr::framesize, LOG_WARNING, celt_attr::maxbitrate, and celt_attr::samplerate.

{
   enum celt_attr_keys key;
   const struct celt_attr *attr = (struct celt_attr *) fattr;

   for (key = va_arg(ap, int);
      key != AST_FORMAT_ATTR_END;
      key = va_arg(ap, int))
   {
      switch (key) {
      case CELT_ATTR_KEY_SAMP_RATE:
         if (attr->samplerate != (va_arg(ap, int))) {
            return -1;
         }
         break;
      case CELT_ATTR_KEY_MAX_BITRATE:
         if (attr->maxbitrate != (va_arg(ap, int))) {
            return -1;
         }
         break;
      case CELT_ATTR_KEY_FRAME_SIZE:
         if (attr->framesize != (va_arg(ap, int))) {
            return -1;
         }
         break;
      default:
         ast_log(LOG_WARNING, "unknown attribute type %d\n", key);
         return -1;
      }
   }
   return 0;
}

static void celt_sdp_generate	(	const struct ast_format_attr *	format_attr,
		unsigned int	payload,
		struct ast_str **	str
	)		`[static]`

Definition at line 60 of file res_format_attr_celt.c.

References ast_str_append(), and celt_attr::framesize.

{
   struct celt_attr *attr = (struct celt_attr *) format_attr;

   if (!attr->framesize) {
      return;
   }

   ast_str_append(str, 0, "a=fmtp:%d framesize=%d\r\n", payload, attr->framesize);
}

static int celt_sdp_parse	(	struct ast_format_attr *	format_attr,
		const char *	attributes
	)		`[static]`

Definition at line 48 of file res_format_attr_celt.c.

References celt_attr::framesize.

{
   struct celt_attr *attr = (struct celt_attr *) format_attr;
   unsigned int val;

   if (sscanf(attributes, "framesize=%30u", &val) == 1) {
      attr->framesize = val;
   }

   return 0;
}

static void celt_set	(	struct ast_format_attr *	fattr,
		va_list	ap
	)		`[static]`

Definition at line 155 of file res_format_attr_celt.c.

References AST_FORMAT_ATTR_END, ast_log(), CELT_ATTR_KEY_FRAME_SIZE, CELT_ATTR_KEY_MAX_BITRATE, CELT_ATTR_KEY_SAMP_RATE, celt_attr::framesize, LOG_WARNING, celt_attr::maxbitrate, and celt_attr::samplerate.

{
   enum celt_attr_keys key;
   struct celt_attr *attr = (struct celt_attr *) fattr;

   for (key = va_arg(ap, int);
      key != AST_FORMAT_ATTR_END;
      key = va_arg(ap, int))
   {
      switch (key) {
      case CELT_ATTR_KEY_SAMP_RATE:
         attr->samplerate = (va_arg(ap, int));
         break;
      case CELT_ATTR_KEY_MAX_BITRATE:
         attr->maxbitrate = (va_arg(ap, int));
         break;
      case CELT_ATTR_KEY_FRAME_SIZE:
         attr->framesize = (va_arg(ap, int));
         break;
      default:
         ast_log(LOG_WARNING, "unknown attribute type %d\n", key);
      }
   }
}

static int load_module ( void ) [static]

Definition at line 191 of file res_format_attr_celt.c.

References ast_format_attr_reg_interface(), AST_MODULE_LOAD_DECLINE, and AST_MODULE_LOAD_SUCCESS.

{
   if (ast_format_attr_reg_interface(&celt_interface)) {
      return AST_MODULE_LOAD_DECLINE;
   }

   return AST_MODULE_LOAD_SUCCESS;
}

static int unload_module ( void ) [static]

Definition at line 200 of file res_format_attr_celt.c.

References ast_format_attr_unreg_interface().

{
   ast_format_attr_unreg_interface(&celt_interface);
   return 0;
}

Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "CELT Format Attribute Module" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_CHANNEL_DEPEND, } [static]

Definition at line 210 of file res_format_attr_celt.c.

struct ast_module_info* ast_module_info = &__mod_info [static]

Definition at line 210 of file res_format_attr_celt.c.

struct ast_format_attr_interface celt_interface [static]

Definition at line 180 of file res_format_attr_celt.c.

Asterisk developer's documentation

Data Structures

Functions

Variables

Detailed Description

Function Documentation

Variable Documentation