mirror of https://github.com/asterisk/asterisk
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
276 lines
8.6 KiB
276 lines
8.6 KiB
/*
|
|
* Asterisk -- An open source telephony toolkit.
|
|
*
|
|
* Copyright (C) 2012, Digium, Inc.
|
|
*
|
|
* Joshua Colp <jcolp@digium.com>
|
|
*
|
|
* See http://www.asterisk.org for more information about
|
|
* the Asterisk project. Please do not directly contact
|
|
* any of the maintainers of this project for assistance;
|
|
* the project provides a web site, mailing lists and IRC
|
|
* channels for your use.
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License Version 2. See the LICENSE file
|
|
* at the top of the source tree.
|
|
*
|
|
*/
|
|
|
|
/*! \file
|
|
*
|
|
* \brief H.263 Format Attribute Module
|
|
*
|
|
* \author\verbatim Joshua Colp <jcolp@digium.com> \endverbatim
|
|
*
|
|
* This is a format attribute module for the H.263 codec.
|
|
* \ingroup applications
|
|
*/
|
|
|
|
/*** MODULEINFO
|
|
<support_level>core</support_level>
|
|
***/
|
|
|
|
#include "asterisk.h"
|
|
|
|
#include "asterisk/module.h"
|
|
#include "asterisk/format.h"
|
|
|
|
struct h263_attr {
|
|
unsigned int SQCIF; /*!< Minimum picture interval for SQCIF resolution */
|
|
unsigned int QCIF; /*!< Minimum picture interval for QCIF resolution */
|
|
unsigned int CIF; /*!< Minimum picture interval for CIF resolution */
|
|
unsigned int CIF4; /*!< Minimum picture interval for CIF4 resolution */
|
|
unsigned int CIF16; /*!< Minimum picture interval for CIF16 resolution */
|
|
unsigned int VGA; /*!< Minimum picture interval for VGA resolution */
|
|
unsigned int CUSTOM_XMAX; /*!< Custom resolution (Xmax) */
|
|
unsigned int CUSTOM_YMAX; /*!< Custom resolution (Ymax) */
|
|
unsigned int CUSTOM_MPI; /*!< Custom resolution (MPI) */
|
|
unsigned int F; /*!< F annex support */
|
|
unsigned int I; /*!< I annex support */
|
|
unsigned int J; /*!< J annex support */
|
|
unsigned int T; /*!< T annex support */
|
|
unsigned int K; /*!< K annex support */
|
|
unsigned int N; /*!< N annex support */
|
|
unsigned int P_SUB1; /*!< Reference picture resampling (sub mode 1) */
|
|
unsigned int P_SUB2; /*!< Reference picture resampling (sub mode 2) */
|
|
unsigned int P_SUB3; /*!< Reference picture resampling (sub mode 3) */
|
|
unsigned int P_SUB4; /*!< Reference picture resampling (sub mode 4) */
|
|
unsigned int PAR_WIDTH; /*!< Pixel aspect ratio (width) */
|
|
unsigned int PAR_HEIGHT; /*!< Pixel aspect ratio (height) */
|
|
unsigned int BPP; /*!< Bits per picture maximum */
|
|
unsigned int HRD; /*!< Hypothetical reference decoder status */
|
|
};
|
|
|
|
static void h263_destroy(struct ast_format *format)
|
|
{
|
|
struct h263_attr *attr = ast_format_get_attribute_data(format);
|
|
|
|
ast_free(attr);
|
|
}
|
|
|
|
static int h263_clone(const struct ast_format *src, struct ast_format *dst)
|
|
{
|
|
struct h263_attr *original = ast_format_get_attribute_data(src);
|
|
struct h263_attr *attr = ast_calloc(1, sizeof(*attr));
|
|
|
|
if (!attr) {
|
|
return -1;
|
|
}
|
|
|
|
if (original) {
|
|
*attr = *original;
|
|
}
|
|
|
|
ast_format_set_attribute_data(dst, attr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum ast_format_cmp_res h263_cmp(const struct ast_format *format1, const struct ast_format *format2)
|
|
{
|
|
struct h263_attr *attr1 = ast_format_get_attribute_data(format1);
|
|
struct h263_attr *attr2 = ast_format_get_attribute_data(format2);
|
|
|
|
if (!attr1 || !attr2 || (attr1 && attr2 && !memcmp(attr1, attr2, sizeof(*attr1)))) {
|
|
return AST_FORMAT_CMP_EQUAL;
|
|
}
|
|
return AST_FORMAT_CMP_NOT_EQUAL;
|
|
}
|
|
|
|
#define DETERMINE_JOINT(joint, attr1, attr2, field) (joint->field = (attr1 && attr1->field) ? attr1->field : (attr2 && attr2->field) ? attr2->field : 0)
|
|
|
|
static struct ast_format *h263_getjoint(const struct ast_format *format1, const struct ast_format *format2)
|
|
{
|
|
struct ast_format *cloned;
|
|
struct h263_attr *attr, *attr1, *attr2;
|
|
|
|
cloned = ast_format_clone(format1);
|
|
if (!cloned) {
|
|
return NULL;
|
|
}
|
|
attr = ast_format_get_attribute_data(cloned);
|
|
|
|
attr1 = ast_format_get_attribute_data(format1);
|
|
attr2 = ast_format_get_attribute_data(format2);
|
|
|
|
DETERMINE_JOINT(attr, attr1, attr2, SQCIF);
|
|
DETERMINE_JOINT(attr, attr1, attr2, QCIF);
|
|
DETERMINE_JOINT(attr, attr1, attr2, CIF);
|
|
DETERMINE_JOINT(attr, attr1, attr2, CIF4);
|
|
DETERMINE_JOINT(attr, attr1, attr2, CIF16);
|
|
DETERMINE_JOINT(attr, attr1, attr2, VGA);
|
|
DETERMINE_JOINT(attr, attr1, attr2, CUSTOM_XMAX);
|
|
DETERMINE_JOINT(attr, attr1, attr2, CUSTOM_YMAX);
|
|
DETERMINE_JOINT(attr, attr1, attr2, CUSTOM_MPI);
|
|
DETERMINE_JOINT(attr, attr1, attr2, F);
|
|
DETERMINE_JOINT(attr, attr1, attr2, I);
|
|
DETERMINE_JOINT(attr, attr1, attr2, J);
|
|
DETERMINE_JOINT(attr, attr1, attr2, T);
|
|
DETERMINE_JOINT(attr, attr1, attr2, K);
|
|
DETERMINE_JOINT(attr, attr1, attr2, N);
|
|
DETERMINE_JOINT(attr, attr1, attr2, P_SUB1);
|
|
DETERMINE_JOINT(attr, attr1, attr2, P_SUB2);
|
|
DETERMINE_JOINT(attr, attr1, attr2, P_SUB3);
|
|
DETERMINE_JOINT(attr, attr1, attr2, P_SUB4);
|
|
DETERMINE_JOINT(attr, attr1, attr2, PAR_WIDTH);
|
|
DETERMINE_JOINT(attr, attr1, attr2, PAR_HEIGHT);
|
|
DETERMINE_JOINT(attr, attr1, attr2, BPP);
|
|
DETERMINE_JOINT(attr, attr1, attr2, HRD);
|
|
|
|
return cloned;
|
|
}
|
|
|
|
static struct ast_format *h263_parse_sdp_fmtp(const struct ast_format *format, const char *attributes)
|
|
{
|
|
char *attribs = ast_strdupa(attributes), *attrib;
|
|
struct ast_format *cloned;
|
|
struct h263_attr *attr;
|
|
|
|
cloned = ast_format_clone(format);
|
|
if (!cloned) {
|
|
return NULL;
|
|
}
|
|
attr = ast_format_get_attribute_data(cloned);
|
|
|
|
while ((attrib = strsep(&attribs, ";"))) {
|
|
unsigned int val, val2 = 0, val3 = 0, val4 = 0;
|
|
|
|
if (sscanf(attrib, "SQCIF=%30u", &val) == 1) {
|
|
attr->SQCIF = val;
|
|
} else if (sscanf(attrib, "QCIF=%30u", &val) == 1) {
|
|
attr->QCIF = val;
|
|
} else if (sscanf(attrib, "CIF=%30u", &val) == 1) {
|
|
attr->CIF = val;
|
|
} else if (sscanf(attrib, "CIF4=%30u", &val) == 1) {
|
|
attr->CIF4 = val;
|
|
} else if (sscanf(attrib, "CIF16=%30u", &val) == 1) {
|
|
attr->CIF16 = val;
|
|
} else if (sscanf(attrib, "VGA=%30u", &val) == 1) {
|
|
attr->VGA = val;
|
|
} else if (sscanf(attrib, "CUSTOM=%30u,%30u,%30u", &val, &val2, &val3) == 3) {
|
|
attr->CUSTOM_XMAX = val;
|
|
attr->CUSTOM_YMAX = val2;
|
|
attr->CUSTOM_MPI = val3;
|
|
} else if (sscanf(attrib, "F=%30u", &val) == 1) {
|
|
attr->F = val;
|
|
} else if (sscanf(attrib, "I=%30u", &val) == 1) {
|
|
attr->I = val;
|
|
} else if (sscanf(attrib, "J=%30u", &val) == 1) {
|
|
attr->J = val;
|
|
} else if (sscanf(attrib, "T=%30u", &val) == 1) {
|
|
attr->T = val;
|
|
} else if (sscanf(attrib, "K=%30u", &val) == 1) {
|
|
attr->K = val;
|
|
} else if (sscanf(attrib, "N=%30u", &val) == 1) {
|
|
attr->N = val;
|
|
} else if (sscanf(attrib, "PAR=%30u:%30u", &val, &val2) == 2) {
|
|
attr->PAR_WIDTH = val;
|
|
attr->PAR_HEIGHT = val2;
|
|
} else if (sscanf(attrib, "BPP=%30u", &val) == 1) {
|
|
attr->BPP = val;
|
|
} else if (sscanf(attrib, "HRD=%30u", &val) == 1) {
|
|
attr->HRD = val;
|
|
} else if (sscanf(attrib, "P=%30u,%30u,%30u,%30u", &val, &val2, &val3, &val4) > 0) {
|
|
attr->P_SUB1 = val;
|
|
attr->P_SUB2 = val2;
|
|
attr->P_SUB3 = val3;
|
|
attr->P_SUB4 = val4;
|
|
}
|
|
}
|
|
|
|
return cloned;
|
|
}
|
|
|
|
static void h263_generate_sdp_fmtp(const struct ast_format *format, unsigned int payload, struct ast_str **str)
|
|
{
|
|
struct h263_attr *attr = ast_format_get_attribute_data(format);
|
|
|
|
if (!attr) {
|
|
return;
|
|
}
|
|
|
|
ast_str_append(str, 0, "a=fmtp:%u SQCIF=%u;QCIF=%u;CIF=%u;CIF4=%u;CIF16=%u;VGA=%u;F=%u;I=%u;J=%u;T=%u;K=%u;N=%u;BPP=%u;HRD=%u",
|
|
payload, attr->SQCIF, attr->QCIF, attr->CIF, attr->CIF4, attr->CIF16, attr->VGA, attr->F, attr->I, attr->J,
|
|
attr->T, attr->K, attr->N, attr->BPP, attr->HRD);
|
|
|
|
if (attr->CUSTOM_XMAX && attr->CUSTOM_YMAX && attr->CUSTOM_MPI) {
|
|
ast_str_append(str, 0, ";CUSTOM=%u,%u,%u", attr->CUSTOM_XMAX, attr->CUSTOM_YMAX, attr->CUSTOM_MPI);
|
|
}
|
|
|
|
if (attr->PAR_WIDTH && attr->PAR_HEIGHT) {
|
|
ast_str_append(str, 0, ";PAR=%u:%u", attr->PAR_WIDTH, attr->PAR_HEIGHT);
|
|
}
|
|
|
|
if (attr->P_SUB1) {
|
|
ast_str_append(str, 0, ";P=%u", attr->P_SUB1);
|
|
if (attr->P_SUB2) {
|
|
ast_str_append(str, 0, ",%u", attr->P_SUB2);
|
|
}
|
|
if (attr->P_SUB3) {
|
|
ast_str_append(str, 0, ",%u", attr->P_SUB3);
|
|
}
|
|
if (attr->P_SUB4) {
|
|
ast_str_append(str, 0, ",%u", attr->P_SUB4);
|
|
}
|
|
}
|
|
|
|
ast_str_append(str, 0, "\r\n");
|
|
|
|
return;
|
|
}
|
|
|
|
static struct ast_format_interface h263_interface = {
|
|
.format_destroy = h263_destroy,
|
|
.format_clone = h263_clone,
|
|
.format_cmp = h263_cmp,
|
|
.format_get_joint = h263_getjoint,
|
|
.format_parse_sdp_fmtp = h263_parse_sdp_fmtp,
|
|
.format_generate_sdp_fmtp = h263_generate_sdp_fmtp,
|
|
};
|
|
|
|
static int unload_module(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int load_module(void)
|
|
{
|
|
if (ast_format_interface_register("h263", &h263_interface)) {
|
|
return AST_MODULE_LOAD_DECLINE;
|
|
}
|
|
|
|
if (ast_format_interface_register("h263p", &h263_interface)) {
|
|
return AST_MODULE_LOAD_DECLINE;
|
|
}
|
|
|
|
return AST_MODULE_LOAD_SUCCESS;
|
|
}
|
|
|
|
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "H.263 Format Attribute Module",
|
|
.support_level = AST_MODULE_SUPPORT_CORE,
|
|
.load = load_module,
|
|
.unload = unload_module,
|
|
.load_pri = AST_MODPRI_DEFAULT,
|
|
);
|