res_format_attr_h263.c File Reference
H.263 Format Attribute Module. More...
Include dependency graph for res_format_attr_h263.c:
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Enumerations | |
| enum | h263_attr_keys { H263_ATTR_KEY_SQCIF, H263_ATTR_KEY_QCIF, H263_ATTR_KEY_CIF, H263_ATTR_KEY_CIF4, H263_ATTR_KEY_CIF16, H263_ATTR_KEY_VGA, H263_ATTR_KEY_CUSTOM_XMAX, H263_ATTR_KEY_CUSTOM_YMAX, H263_ATTR_KEY_CUSTOM_MPI, H263_ATTR_KEY_F, H263_ATTR_KEY_I, H263_ATTR_KEY_J, H263_ATTR_KEY_T, H263_ATTR_KEY_K, H263_ATTR_KEY_N, H263_ATTR_KEY_P_SUB1, H263_ATTR_KEY_P_SUB2, H263_ATTR_KEY_P_SUB3, H263_ATTR_KEY_P_SUB4, H263_ATTR_KEY_PAR_WIDTH, H263_ATTR_KEY_PAR_HEIGHT, H263_ATTR_KEY_BPP, H263_ATTR_KEY_HRD, H263_ATTR_KEY_END } |
Functions | |
| static void | __reg_module (void) |
| static void | __unreg_module (void) |
| static const char * | h263_attr_key_to_str (enum h263_attr_keys key, const struct ast_format_attr *format_attr) |
| Helper function which converts a key enum into a string value for SDP. | |
| static int | h263_format_attr_get_joint (const struct ast_format_attr *fattr1, const struct ast_format_attr *fattr2, struct ast_format_attr *result) |
| static void | h263_format_attr_sdp_generate (const struct ast_format_attr *format_attr, unsigned int payload, struct ast_str **str) |
| static int | h263_format_attr_sdp_parse (struct ast_format_attr *format_attr, const char *attributes) |
| 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 = "H.263 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_DEFAULT, } |
| static struct ast_module_info * | ast_module_info = &__mod_info |
| static struct ast_format_attr_interface | h263_format_attr_interface |
| static struct ast_format_attr_interface | h263p_format_attr_interface |
Detailed Description
H.263 Format Attribute Module.
This is a format attribute module for the H.263 codec.
Definition in file res_format_attr_h263.c.
Enumeration Type Documentation
| enum h263_attr_keys |
- Enumerator:
Definition at line 41 of file res_format_attr_h263.c.
{
H263_ATTR_KEY_SQCIF, /*!< Minimum picture interval for SQCIF resolution */
H263_ATTR_KEY_QCIF, /*!< Minimum picture interval for QCIF resolution */
H263_ATTR_KEY_CIF, /*!< Minimum picture interval for CIF resolution */
H263_ATTR_KEY_CIF4, /*!< Minimum picture interval for CIF4 resolution */
H263_ATTR_KEY_CIF16, /*!< Minimum picture interval for CIF16 resolution */
H263_ATTR_KEY_VGA, /*!< Minimum picture interval for VGA resolution */
H263_ATTR_KEY_CUSTOM_XMAX, /*!< Custom resolution (Xmax) */
H263_ATTR_KEY_CUSTOM_YMAX, /*!< Custom resolution (Ymax) */
H263_ATTR_KEY_CUSTOM_MPI, /*!< Custom resolution (MPI) */
H263_ATTR_KEY_F, /*!< F annex support */
H263_ATTR_KEY_I, /*!< I annex support */
H263_ATTR_KEY_J, /*!< J annex support */
H263_ATTR_KEY_T, /*!< T annex support */
H263_ATTR_KEY_K, /*!< K annex support */
H263_ATTR_KEY_N, /*!< N annex support */
H263_ATTR_KEY_P_SUB1, /*!< Reference picture resampling (sub mode 1) */
H263_ATTR_KEY_P_SUB2, /*!< Reference picture resampling (sub mode 2) */
H263_ATTR_KEY_P_SUB3, /*!< Reference picture resampling (sub mode 3) */
H263_ATTR_KEY_P_SUB4, /*!< Reference picture resampling (sub mode 4) */
H263_ATTR_KEY_PAR_WIDTH, /*!< Pixel aspect ratio (width) */
H263_ATTR_KEY_PAR_HEIGHT, /*!< Pixel aspect ratio (height) */
H263_ATTR_KEY_BPP, /*!< Bits per picture maximum */
H263_ATTR_KEY_HRD, /*!< Hypothetical reference decoder status */
H263_ATTR_KEY_END, /*!< End terminator for list */
};
Function Documentation
| static void __reg_module | ( | void | ) | [static] |
Definition at line 295 of file res_format_attr_h263.c.
| static void __unreg_module | ( | void | ) | [static] |
Definition at line 295 of file res_format_attr_h263.c.
| static const char* h263_attr_key_to_str | ( | enum h263_attr_keys | key, |
| const struct ast_format_attr * | format_attr | ||
| ) | [static] |
Helper function which converts a key enum into a string value for SDP.
Definition at line 134 of file res_format_attr_h263.c.
References ast_format_attr::format_attr, H263_ATTR_KEY_BPP, H263_ATTR_KEY_CIF, H263_ATTR_KEY_CIF16, H263_ATTR_KEY_CIF4, H263_ATTR_KEY_CUSTOM_MPI, H263_ATTR_KEY_CUSTOM_XMAX, H263_ATTR_KEY_CUSTOM_YMAX, H263_ATTR_KEY_END, H263_ATTR_KEY_F, H263_ATTR_KEY_HRD, H263_ATTR_KEY_I, H263_ATTR_KEY_J, H263_ATTR_KEY_K, H263_ATTR_KEY_N, H263_ATTR_KEY_P_SUB1, H263_ATTR_KEY_P_SUB2, H263_ATTR_KEY_P_SUB3, H263_ATTR_KEY_P_SUB4, H263_ATTR_KEY_PAR_HEIGHT, H263_ATTR_KEY_PAR_WIDTH, H263_ATTR_KEY_QCIF, H263_ATTR_KEY_SQCIF, H263_ATTR_KEY_T, and H263_ATTR_KEY_VGA.
Referenced by h263_format_attr_sdp_generate().
{
switch (key) {
case H263_ATTR_KEY_SQCIF:
return format_attr->format_attr[key] ? "SQCIF" : NULL;
case H263_ATTR_KEY_QCIF:
return format_attr->format_attr[key] ? "QCIF" : NULL;
case H263_ATTR_KEY_CIF:
return format_attr->format_attr[key] ? "CIF" : NULL;
case H263_ATTR_KEY_CIF4:
return format_attr->format_attr[key] ? "CIF4" : NULL;
case H263_ATTR_KEY_CIF16:
return format_attr->format_attr[key] ? "CIF16" : NULL;
case H263_ATTR_KEY_VGA:
return format_attr->format_attr[key] ? "VGA" : NULL;
case H263_ATTR_KEY_F:
return "F";
case H263_ATTR_KEY_I:
return "I";
case H263_ATTR_KEY_J:
return "J";
case H263_ATTR_KEY_T:
return "T";
case H263_ATTR_KEY_K:
return "K";
case H263_ATTR_KEY_N:
return "N";
case H263_ATTR_KEY_BPP:
return "BPP";
case H263_ATTR_KEY_HRD:
return "HRD";
case H263_ATTR_KEY_CUSTOM_XMAX:
case H263_ATTR_KEY_CUSTOM_YMAX:
case H263_ATTR_KEY_CUSTOM_MPI:
case H263_ATTR_KEY_P_SUB1:
case H263_ATTR_KEY_P_SUB2:
case H263_ATTR_KEY_P_SUB3:
case H263_ATTR_KEY_P_SUB4:
case H263_ATTR_KEY_PAR_WIDTH:
case H263_ATTR_KEY_PAR_HEIGHT:
case H263_ATTR_KEY_END:
default:
return NULL;
}
return NULL;
}
| static int h263_format_attr_get_joint | ( | const struct ast_format_attr * | fattr1, |
| const struct ast_format_attr * | fattr2, | ||
| struct ast_format_attr * | result | ||
| ) | [static] |
Definition at line 68 of file res_format_attr_h263.c.
References ast_format_attr::format_attr, H263_ATTR_KEY_END, and H263_ATTR_KEY_SQCIF.
{
int i;
/* These are all receiver options so we just copy over what they sent */
for (i = H263_ATTR_KEY_SQCIF; i < H263_ATTR_KEY_END; i++) {
result->format_attr[i] = fattr1->format_attr[i] ? fattr1->format_attr[i] : fattr2->format_attr[i];
}
return 0;
}
| static void h263_format_attr_sdp_generate | ( | const struct ast_format_attr * | format_attr, |
| unsigned int | payload, | ||
| struct ast_str ** | str | ||
| ) | [static] |
Definition at line 182 of file res_format_attr_h263.c.
References ast_str_append(), ast_format_attr::format_attr, H263_ATTR_KEY_CUSTOM_MPI, H263_ATTR_KEY_CUSTOM_XMAX, H263_ATTR_KEY_CUSTOM_YMAX, H263_ATTR_KEY_END, H263_ATTR_KEY_P_SUB1, H263_ATTR_KEY_P_SUB2, H263_ATTR_KEY_P_SUB3, H263_ATTR_KEY_P_SUB4, H263_ATTR_KEY_PAR_HEIGHT, H263_ATTR_KEY_PAR_WIDTH, H263_ATTR_KEY_SQCIF, h263_attr_key_to_str(), and name.
{
int i, added = 0;
for (i = H263_ATTR_KEY_SQCIF; i < H263_ATTR_KEY_END; i++) {
const char *name;
if (i == H263_ATTR_KEY_CUSTOM_XMAX) {
if (!format_attr->format_attr[H263_ATTR_KEY_CUSTOM_XMAX] || !format_attr->format_attr[H263_ATTR_KEY_CUSTOM_YMAX] ||
!format_attr->format_attr[H263_ATTR_KEY_CUSTOM_MPI]) {
continue;
}
if (!added) {
ast_str_append(str, 0, "a=fmtp:%d CUSTOM=%u,%u,%u", payload, format_attr->format_attr[H263_ATTR_KEY_CUSTOM_XMAX],
format_attr->format_attr[H263_ATTR_KEY_CUSTOM_YMAX], format_attr->format_attr[H263_ATTR_KEY_CUSTOM_MPI]);
added = 1;
} else {
ast_str_append(str, 0, ";CUSTOM=%u,%u,%u", format_attr->format_attr[H263_ATTR_KEY_CUSTOM_XMAX],
format_attr->format_attr[H263_ATTR_KEY_CUSTOM_YMAX], format_attr->format_attr[H263_ATTR_KEY_CUSTOM_MPI]);
}
} else if (i == H263_ATTR_KEY_PAR_WIDTH) {
if (!format_attr->format_attr[H263_ATTR_KEY_PAR_WIDTH] || !format_attr->format_attr[H263_ATTR_KEY_PAR_HEIGHT]) {
continue;
}
if (!added) {
ast_str_append(str, 0, "a=fmtp:%d PAR=%u:%u", payload, format_attr->format_attr[H263_ATTR_KEY_PAR_WIDTH],
format_attr->format_attr[H263_ATTR_KEY_PAR_HEIGHT]);
added = 1;
} else {
ast_str_append(str, 0, ";PAR=%u:%u", format_attr->format_attr[H263_ATTR_KEY_PAR_WIDTH],
format_attr->format_attr[H263_ATTR_KEY_PAR_HEIGHT]);
}
} else if (i == H263_ATTR_KEY_P_SUB1) {
if (!format_attr->format_attr[H263_ATTR_KEY_P_SUB1]) {
continue;
}
if (!added) {
ast_str_append(str, 0, "a=fmtp:%d P=%u", payload, format_attr->format_attr[H263_ATTR_KEY_P_SUB1]);
added = 1;
} else {
ast_str_append(str, 0, ";P=%u", format_attr->format_attr[H263_ATTR_KEY_P_SUB1]);
}
if (format_attr->format_attr[H263_ATTR_KEY_P_SUB2]) {
ast_str_append(str, 0, ",%u", format_attr->format_attr[H263_ATTR_KEY_P_SUB2]);
}
if (format_attr->format_attr[H263_ATTR_KEY_P_SUB3]) {
ast_str_append(str, 0, ",%u", format_attr->format_attr[H263_ATTR_KEY_P_SUB3]);
}
if (format_attr->format_attr[H263_ATTR_KEY_P_SUB4]) {
ast_str_append(str, 0, ",%u", format_attr->format_attr[H263_ATTR_KEY_P_SUB4]);
}
} else if ((name = h263_attr_key_to_str(i, format_attr))) {
if (!added) {
ast_str_append(str, 0, "a=fmtp:%d %s=%u", payload, name, format_attr->format_attr[i]);
added = 1;
} else {
ast_str_append(str, 0, ";%s=%u", name, format_attr->format_attr[i]);
}
}
}
if (added) {
ast_str_append(str, 0, "\r\n");
}
return;
}
| static int h263_format_attr_sdp_parse | ( | struct ast_format_attr * | format_attr, |
| const char * | attributes | ||
| ) | [static] |
Definition at line 80 of file res_format_attr_h263.c.
References ast_format_attr::format_attr, H263_ATTR_KEY_BPP, H263_ATTR_KEY_CIF, H263_ATTR_KEY_CIF16, H263_ATTR_KEY_CIF4, H263_ATTR_KEY_CUSTOM_MPI, H263_ATTR_KEY_CUSTOM_XMAX, H263_ATTR_KEY_CUSTOM_YMAX, H263_ATTR_KEY_F, H263_ATTR_KEY_HRD, H263_ATTR_KEY_I, H263_ATTR_KEY_J, H263_ATTR_KEY_K, H263_ATTR_KEY_N, H263_ATTR_KEY_P_SUB1, H263_ATTR_KEY_P_SUB2, H263_ATTR_KEY_P_SUB3, H263_ATTR_KEY_P_SUB4, H263_ATTR_KEY_PAR_HEIGHT, H263_ATTR_KEY_PAR_WIDTH, H263_ATTR_KEY_QCIF, H263_ATTR_KEY_SQCIF, H263_ATTR_KEY_T, and H263_ATTR_KEY_VGA.
{
char *attribs = ast_strdupa(attributes), *attrib;
while ((attrib = strsep(&attribs, ";"))) {
unsigned int val, val2 = 0, val3 = 0, val4 = 0;
if (sscanf(attrib, "SQCIF=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_SQCIF] = val;
} else if (sscanf(attrib, "QCIF=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_QCIF] = val;
} else if (sscanf(attrib, "CIF=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_CIF] = val;
} else if (sscanf(attrib, "CIF4=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_CIF4] = val;
} else if (sscanf(attrib, "CIF16=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_CIF16] = val;
} else if (sscanf(attrib, "VGA=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_VGA] = val;
} else if (sscanf(attrib, "CUSTOM=%30u,%30u,%30u", &val, &val2, &val3) == 3) {
format_attr->format_attr[H263_ATTR_KEY_CUSTOM_XMAX] = val;
format_attr->format_attr[H263_ATTR_KEY_CUSTOM_YMAX] = val2;
format_attr->format_attr[H263_ATTR_KEY_CUSTOM_MPI] = val3;
} else if (sscanf(attrib, "F=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_F] = val;
} else if (sscanf(attrib, "I=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_I] = val;
} else if (sscanf(attrib, "J=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_J] = val;
} else if (sscanf(attrib, "T=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_T] = val;
} else if (sscanf(attrib, "K=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_K] = val;
} else if (sscanf(attrib, "N=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_N] = val;
} else if (sscanf(attrib, "PAR=%30u:%30u", &val, &val2) == 2) {
format_attr->format_attr[H263_ATTR_KEY_PAR_WIDTH] = val;
format_attr->format_attr[H263_ATTR_KEY_PAR_HEIGHT] = val2;
} else if (sscanf(attrib, "BPP=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_BPP] = val;
} else if (sscanf(attrib, "HRD=%30u", &val) == 1) {
format_attr->format_attr[H263_ATTR_KEY_HRD] = val;
} else if (sscanf(attrib, "P=%30u,%30u,%30u,%30u", &val, &val2, &val3, &val4) > 0) {
format_attr->format_attr[H263_ATTR_KEY_P_SUB1] = val;
format_attr->format_attr[H263_ATTR_KEY_P_SUB2] = val2;
format_attr->format_attr[H263_ATTR_KEY_P_SUB3] = val3;
format_attr->format_attr[H263_ATTR_KEY_P_SUB4] = val4;
}
}
return 0;
}
| static int load_module | ( | void | ) | [static] |
Definition at line 277 of file res_format_attr_h263.c.
References ast_format_attr_reg_interface(), ast_format_attr_unreg_interface(), AST_MODULE_LOAD_DECLINE, and AST_MODULE_LOAD_SUCCESS.
{
if (ast_format_attr_reg_interface(&h263_format_attr_interface)) {
return AST_MODULE_LOAD_DECLINE;
}
if (ast_format_attr_reg_interface(&h263p_format_attr_interface)) {
ast_format_attr_unreg_interface(&h263_format_attr_interface);
return AST_MODULE_LOAD_DECLINE;
}
return AST_MODULE_LOAD_SUCCESS;
}
| static int unload_module | ( | void | ) | [static] |
Definition at line 269 of file res_format_attr_h263.c.
References ast_format_attr_unreg_interface().
Variable Documentation
struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "H.263 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_DEFAULT, } [static] |
Definition at line 295 of file res_format_attr_h263.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 295 of file res_format_attr_h263.c.
struct ast_format_attr_interface h263_format_attr_interface [static] |
Definition at line 255 of file res_format_attr_h263.c.
struct ast_format_attr_interface h263p_format_attr_interface [static] |
Definition at line 262 of file res_format_attr_h263.c.
