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asterisk/res/res_format_attr_h264.c
Matt Jordan 4a58261694 git migration: Refactor the ASTERISK_FILE_VERSION macro 
Git does not support the ability to replace a token with a version
string during check-in. While it does have support for replacing a
token on clone, this is somewhat sub-optimal: the token is replaced
with the object hash, which is not particularly easy for human
consumption. What's more, in practice, the source file version was often
not terribly useful. Generally, when triaging bugs, the overall version
of Asterisk is far more useful than an individual SVN version of a file. As a
result, this patch removes Asterisk's support for showing source file
versions.

Specifically, it does the following:

* Rename ASTERISK_FILE_VERSION macro to ASTERISK_REGISTER_FILE, and
  remove passing the version in with the macro. Other facilities
  than 'core show file version' make use of the file names, such as
  setting a debug level only on a specific file. As such, the act of
  registering source files with the Asterisk core still has use. The
  macro rename now reflects the new macro purpose.

* main/asterisk:
  - Refactor the file_version structure to reflect that it no longer
    tracks a version field.
  - Remove the "core show file version" CLI command. Without the file
    version, it is no longer useful.
  - Remove the ast_file_version_find function. The file version is no
    longer tracked.
  - Rename ast_register_file_version/ast_unregister_file_version to
    ast_register_file/ast_unregister_file, respectively.

* main/manager: Remove value from the Version key of the ModuleCheck
  Action. The actual key itself has not been removed, as doing so would
  absolutely constitute a backwards incompatible change. However, since
  the file version is no longer tracked, there is no need to attempt to
  include it in the Version key.

* UPGRADE: Add notes for:
  - Modification to the ModuleCheck AMI Action
  - Removal of the "core show file version" CLI command

Change-Id: I6cf0ff280e1668bf4957dc21f32a5ff43444a40e
2015-04-13 03:48:57 -04:00

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/*
* 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.264 Format Attribute Module
*
* \author\verbatim Joshua Colp <jcolp@digium.com> \endverbatim
*
* This is a format attribute module for the H.264 codec.
* \ingroup applications
*/
/*** MODULEINFO
<support_level>core</support_level>
***/
#include "asterisk.h"
ASTERISK_REGISTER_FILE()
#include "asterisk/module.h"
#include "asterisk/format.h"
/*! \brief Value that indicates an attribute is actually unset */
#define H264_ATTR_KEY_UNSET UINT8_MAX
/*! \brief Maximum size for SPS / PPS values in sprop-parameter-sets attribute
* if you change this value then you must change H264_MAX_SPS_PPS_SIZE_SCAN_LIMIT
* as well. */
#define H264_MAX_SPS_PPS_SIZE 16
/*! \brief This is used when executing sscanf on buffers of H264_MAX_SPS_PPS_SIZE
* length. It must ALWAYS be a string literal representation of one less than
* H264_MAX_SPS_PPS_SIZE */
#define H264_MAX_SPS_PPS_SIZE_SCAN_LIMIT "15"
struct h264_attr {
unsigned int PROFILE_IDC;
unsigned int PROFILE_IOP;
unsigned int LEVEL;
unsigned int MAX_MBPS;
unsigned int MAX_FS;
unsigned int MAX_CPB;
unsigned int MAX_DPB;
unsigned int MAX_BR;
unsigned int MAX_SMBPS;
unsigned int MAX_FPS;
unsigned int REDUNDANT_PIC_CAP;
unsigned int PARAMETER_ADD;
unsigned int PACKETIZATION_MODE;
unsigned int SPROP_INTERLEAVING_DEPTH;
unsigned int SPROP_DEINT_BUF_REQ;
unsigned int DEINT_BUF_CAP;
unsigned int SPROP_INIT_BUF_TIME;
unsigned int SPROP_MAX_DON_DIFF;
unsigned int MAX_RCMD_NALU_SIZE;
unsigned int LEVEL_ASYMMETRY_ALLOWED;
char SPS[H264_MAX_SPS_PPS_SIZE];
char PPS[H264_MAX_SPS_PPS_SIZE];
};
static void h264_destroy(struct ast_format *format)
{
struct h264_attr *attr = ast_format_get_attribute_data(format);
ast_free(attr);
}
static int h264_clone(const struct ast_format *src, struct ast_format *dst)
{
struct h264_attr *original = ast_format_get_attribute_data(src);
struct h264_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 h264_cmp(const struct ast_format *format1, const struct ast_format *format2)
{
struct h264_attr *attr1 = ast_format_get_attribute_data(format1);
struct h264_attr *attr2 = ast_format_get_attribute_data(format2);
if (!attr1 || !attr1->PROFILE_IDC || !attr2 || !attr2->PROFILE_IDC ||
(attr1->PROFILE_IDC == attr2->PROFILE_IDC)) {
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 *h264_getjoint(const struct ast_format *format1, const struct ast_format *format2)
{
struct ast_format *cloned;
struct h264_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, PROFILE_IDC);
DETERMINE_JOINT(attr, attr1, attr2, PROFILE_IOP);
DETERMINE_JOINT(attr, attr1, attr2, LEVEL);
DETERMINE_JOINT(attr, attr1, attr2, MAX_MBPS);
DETERMINE_JOINT(attr, attr1, attr2, MAX_FS);
DETERMINE_JOINT(attr, attr1, attr2, MAX_CPB);
DETERMINE_JOINT(attr, attr1, attr2, MAX_DPB);
DETERMINE_JOINT(attr, attr1, attr2, MAX_BR);
DETERMINE_JOINT(attr, attr1, attr2, MAX_SMBPS);
DETERMINE_JOINT(attr, attr1, attr2, MAX_FPS);
DETERMINE_JOINT(attr, attr1, attr2, REDUNDANT_PIC_CAP);
DETERMINE_JOINT(attr, attr1, attr2, PARAMETER_ADD);
DETERMINE_JOINT(attr, attr1, attr2, SPROP_INTERLEAVING_DEPTH);
DETERMINE_JOINT(attr, attr1, attr2, SPROP_DEINT_BUF_REQ);
DETERMINE_JOINT(attr, attr1, attr2, DEINT_BUF_CAP);
DETERMINE_JOINT(attr, attr1, attr2, SPROP_INIT_BUF_TIME);
DETERMINE_JOINT(attr, attr1, attr2, SPROP_MAX_DON_DIFF);
DETERMINE_JOINT(attr, attr1, attr2, MAX_RCMD_NALU_SIZE);
DETERMINE_JOINT(attr, attr1, attr2, LEVEL_ASYMMETRY_ALLOWED);
DETERMINE_JOINT(attr, attr1, attr2, PACKETIZATION_MODE);
if (attr1 && !ast_strlen_zero(attr1->SPS)) {
ast_copy_string(attr->SPS, attr1->SPS, sizeof(attr->SPS));
} else if (attr2 && !ast_strlen_zero(attr2->SPS)) {
ast_copy_string(attr->SPS, attr2->SPS, sizeof(attr->SPS));
}
if (attr1 && !ast_strlen_zero(attr1->PPS)) {
ast_copy_string(attr->PPS, attr1->PPS, sizeof(attr->PPS));
} else if (attr2 && !ast_strlen_zero(attr2->PPS)) {
ast_copy_string(attr->PPS, attr2->PPS, sizeof(attr->PPS));
}
return cloned;
}
static struct ast_format *h264_parse_sdp_fmtp(const struct ast_format *format, const char *attributes)
{
char *attribs = ast_strdupa(attributes), *attrib;
struct ast_format *cloned;
struct h264_attr *attr;
cloned = ast_format_clone(format);
if (!cloned) {
return NULL;
}
attr = ast_format_get_attribute_data(cloned);
attr->REDUNDANT_PIC_CAP = H264_ATTR_KEY_UNSET;
attr->PARAMETER_ADD = H264_ATTR_KEY_UNSET;
attr->PACKETIZATION_MODE = H264_ATTR_KEY_UNSET;
attr->LEVEL_ASYMMETRY_ALLOWED = H264_ATTR_KEY_UNSET;
while ((attrib = strsep(&attribs, ";"))) {
unsigned int val;
unsigned long int val2;
if (sscanf(attrib, "profile-level-id=%lx", &val2) == 1) {
attr->PROFILE_IDC = ((val2 >> 16) & 0xFF);
attr->PROFILE_IOP = ((val2 >> 8) & 0xFF);
attr->LEVEL = (val2 & 0xFF);
} else if (sscanf(attrib, "sprop-parameter-sets=%" H264_MAX_SPS_PPS_SIZE_SCAN_LIMIT "[^','],%" H264_MAX_SPS_PPS_SIZE_SCAN_LIMIT "s", attr->SPS, attr->PPS) == 2) {
/* XXX sprop-parameter-sets can actually be of unlimited length. This may need to be addressed later. */
} else if (sscanf(attrib, "max-mbps=%30u", &val) == 1) {
attr->MAX_MBPS = val;
} else if (sscanf(attrib, "max-fs=%30u", &val) == 1) {
attr->MAX_FS = val;
} else if (sscanf(attrib, "max-cpb=%30u", &val) == 1) {
attr->MAX_CPB = val;
} else if (sscanf(attrib, "max-dpb=%30u", &val) == 1) {
attr->MAX_DPB = val;
} else if (sscanf(attrib, "max-br=%30u", &val) == 1) {
attr->MAX_BR = val;
} else if (sscanf(attrib, "max-smbps=%30u", &val) == 1) {
attr->MAX_SMBPS = val;
} else if (sscanf(attrib, "max-fps=%30u", &val) == 1) {
attr->MAX_FPS = val;
} else if (sscanf(attrib, "redundant-pic-cap=%30u", &val) == 1) {
attr->REDUNDANT_PIC_CAP = val;
} else if (sscanf(attrib, "parameter-add=%30u", &val) == 1) {
attr->PARAMETER_ADD = val;
} else if (sscanf(attrib, "packetization-mode=%30u", &val) == 1) {
attr->PACKETIZATION_MODE = val;
} else if (sscanf(attrib, "sprop-interleaving-depth=%30u", &val) == 1) {
attr->SPROP_INTERLEAVING_DEPTH = val;
} else if (sscanf(attrib, "sprop-deint-buf-req=%30u", &val) == 1) {
attr->SPROP_DEINT_BUF_REQ = val;
} else if (sscanf(attrib, "deint-buf-cap=%30u", &val) == 1) {
attr->DEINT_BUF_CAP = val;
} else if (sscanf(attrib, "sprop-init-buf-time=%30u", &val) == 1) {
attr->SPROP_INIT_BUF_TIME = val;
} else if (sscanf(attrib, "sprop-max-don-diff=%30u", &val) == 1) {
attr->SPROP_MAX_DON_DIFF = val;
} else if (sscanf(attrib, "max-rcmd-nalu-size=%30u", &val) == 1) {
attr->MAX_RCMD_NALU_SIZE = val;
} else if (sscanf(attrib, "level-asymmetry-allowed=%30u", &val) == 1) {
attr->LEVEL_ASYMMETRY_ALLOWED = val;
}
}
return cloned;
}
#define APPEND_IF_NOT_H264_UNSET(field, str, name) do { \
if (field != H264_ATTR_KEY_UNSET) { \
if (added) { \
ast_str_append(str, 0, ";"); \
} else { \
added = 1; \
} \
ast_str_append(str, 0, "%s=%u", name, field); \
} \
} while (0)
#define APPEND_IF_NONZERO(field, str, name) do { \
if (field) { \
if (added) { \
ast_str_append(str, 0, ";"); \
} else { \
added = 1; \
} \
ast_str_append(str, 0, "%s=%u", name, field); \
} \
} while (0)
static void h264_generate_sdp_fmtp(const struct ast_format *format, unsigned int payload, struct ast_str **str)
{
struct h264_attr *attr = ast_format_get_attribute_data(format);
int added = 0;
if (!attr) {
return;
}
ast_str_append(str, 0, "a=fmtp:%u ", payload);
APPEND_IF_NONZERO(attr->MAX_MBPS, str, "max-mbps");
APPEND_IF_NONZERO(attr->MAX_FS, str, "max-fs");
APPEND_IF_NONZERO(attr->MAX_CPB, str, "max-cpb");
APPEND_IF_NONZERO(attr->MAX_DPB, str, "max-dpb");
APPEND_IF_NONZERO(attr->MAX_BR, str, "max-br");
APPEND_IF_NONZERO(attr->MAX_SMBPS, str, "max-smbps");
APPEND_IF_NONZERO(attr->MAX_FPS, str, "max-fps");
APPEND_IF_NONZERO(attr->SPROP_INTERLEAVING_DEPTH, str, "sprop-interleaving-depth");
APPEND_IF_NONZERO(attr->SPROP_DEINT_BUF_REQ, str, "sprop-deint-buf-req");
APPEND_IF_NONZERO(attr->DEINT_BUF_CAP, str, "deint-buf-cap");
APPEND_IF_NONZERO(attr->SPROP_INIT_BUF_TIME, str, "sprop-init-buf-time");
APPEND_IF_NONZERO(attr->SPROP_MAX_DON_DIFF, str, "sprop-max-don-diff");
APPEND_IF_NONZERO(attr->MAX_RCMD_NALU_SIZE, str, "max-rcmd-nalu-size");
APPEND_IF_NOT_H264_UNSET(attr->REDUNDANT_PIC_CAP, str, "redundant-pic-cap");
APPEND_IF_NOT_H264_UNSET(attr->PARAMETER_ADD, str, "parameter-add");
APPEND_IF_NOT_H264_UNSET(attr->PACKETIZATION_MODE, str, "packetization-mode");
APPEND_IF_NOT_H264_UNSET(attr->LEVEL_ASYMMETRY_ALLOWED, str, "level-asymmetry-allowed");
if (attr->PROFILE_IDC && attr->PROFILE_IOP && attr->LEVEL) {
if (added) {
ast_str_append(str, 0, ";");
} else {
added = 1;
}
ast_str_append(str, 0, "profile-level-id=%02X%02X%02X", attr->PROFILE_IDC, attr->PROFILE_IOP, attr->LEVEL);
}
if (!ast_strlen_zero(attr->SPS) && !ast_strlen_zero(attr->PPS)) {
if (added) {
ast_str_append(str, 0, ";");
} else {
added = 1;
}
ast_str_append(str, 0, ";sprop-parameter-sets=%s,%s", attr->SPS, attr->PPS);
}
if (!added) {
ast_str_reset(*str);
} else {
ast_str_append(str, 0, "\r\n");
}
return;
}
static struct ast_format_interface h264_interface = {
.format_destroy = h264_destroy,
.format_clone = h264_clone,
.format_cmp = h264_cmp,
.format_get_joint = h264_getjoint,
.format_parse_sdp_fmtp = h264_parse_sdp_fmtp,
.format_generate_sdp_fmtp = h264_generate_sdp_fmtp,
};
static int unload_module(void)
{
return 0;
}
static int load_module(void)
{
if (ast_format_interface_register("h264", &h264_interface)) {
return AST_MODULE_LOAD_DECLINE;
}
return AST_MODULE_LOAD_SUCCESS;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "H.264 Format Attribute Module",
.support_level = AST_MODULE_SUPPORT_CORE,
.load = load_module,
.unload = unload_module,
.load_pri = AST_MODPRI_DEFAULT,
);
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