diff options
| -rw-r--r-- | include/asterisk/format.h | 2 | ||||
| -rw-r--r-- | res/res_format_attr_h263.c | 295 | ||||
| -rw-r--r-- | res/res_format_attr_h264.c | 305 |
3 files changed, 601 insertions, 1 deletions
diff --git a/include/asterisk/format.h b/include/asterisk/format.h index 9dd6eb8b2..61ddf9041 100644 --- a/include/asterisk/format.h +++ b/include/asterisk/format.h @@ -29,7 +29,7 @@ #include "asterisk/astobj2.h" #include "asterisk/silk.h" #include "asterisk/celt.h" -#define AST_FORMAT_ATTR_SIZE 128 +#define AST_FORMAT_ATTR_SIZE 64 #define AST_FORMAT_INC 100000 /*! This is the value that ends a var list of format attribute diff --git a/res/res_format_attr_h263.c b/res/res_format_attr_h263.c new file mode 100644 index 000000000..2ca39a927 --- /dev/null +++ b/res/res_format_attr_h263.c @@ -0,0 +1,295 @@ +/* + * 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" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#include "asterisk/module.h" +#include "asterisk/format.h" + +enum h263_attr_keys { + 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 */ +}; + +static int h263_format_attr_get_joint(const struct ast_format_attr *fattr1, const struct ast_format_attr *fattr2, struct ast_format_attr *result) +{ + 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 int h263_format_attr_sdp_parse(struct ast_format_attr *format_attr, const char *attributes) +{ + 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; +} + +/*! \brief Helper function which converts a key enum into a string value for SDP */ +static const char *h263_attr_key_to_str(enum h263_attr_keys key, const struct ast_format_attr *format_attr) +{ + 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 void h263_format_attr_sdp_generate(const struct ast_format_attr *format_attr, unsigned int payload, struct ast_str **str) +{ + 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 struct ast_format_attr_interface h263_format_attr_interface = { + .id = AST_FORMAT_H263, + .format_attr_get_joint = h263_format_attr_get_joint, + .format_attr_sdp_parse = h263_format_attr_sdp_parse, + .format_attr_sdp_generate = h263_format_attr_sdp_generate, +}; + +static struct ast_format_attr_interface h263p_format_attr_interface = { + .id = AST_FORMAT_H263_PLUS, + .format_attr_get_joint = h263_format_attr_get_joint, + .format_attr_sdp_parse = h263_format_attr_sdp_parse, + .format_attr_sdp_generate = h263_format_attr_sdp_generate, +}; + +static int unload_module(void) +{ + ast_format_attr_unreg_interface(&h263_format_attr_interface); + ast_format_attr_unreg_interface(&h263p_format_attr_interface); + + return 0; +} + +static int load_module(void) +{ + 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; +} + +AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "H.263 Format Attribute Module", + .load = load_module, + .unload = unload_module, + .load_pri = AST_MODPRI_DEFAULT, +); diff --git a/res/res_format_attr_h264.c b/res/res_format_attr_h264.c new file mode 100644 index 000000000..c488babf2 --- /dev/null +++ b/res/res_format_attr_h264.c @@ -0,0 +1,305 @@ +/* + * 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_FILE_VERSION(__FILE__, "$Revision$") + +#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 */ +#define H264_MAX_SPS_PPS_SIZE 16 + +enum h264_attr_keys { + H264_ATTR_KEY_PROFILE_IDC, + H264_ATTR_KEY_PROFILE_IOP, + H264_ATTR_KEY_LEVEL, + H264_ATTR_KEY_MAX_MBPS, + H264_ATTR_KEY_MAX_FS, + H264_ATTR_KEY_MAX_CPB, + H264_ATTR_KEY_MAX_DPB, + H264_ATTR_KEY_MAX_BR, + H264_ATTR_KEY_REDUNDANT_PIC_CAP, + H264_ATTR_KEY_PARAMETER_ADD, + H264_ATTR_KEY_PACKETIZATION_MODE, + H264_ATTR_KEY_SPROP_INTERLEAVING_DEPTH, + H264_ATTR_KEY_SPROP_DEINT_BUF_REQ, + H264_ATTR_KEY_DEINT_BUF_CAP, + H264_ATTR_KEY_SPROP_INIT_BUF_TIME, + H264_ATTR_KEY_SPROP_MAX_DON_DIFF, + H264_ATTR_KEY_MAX_RCMD_NALU_SIZE, + H264_ATTR_KEY_LEVEL_ASYMMETRY_ALLOWED, + H264_ATTR_KEY_SPS_LEN, + H264_ATTR_KEY_PPS_LEN, + H264_ATTR_KEY_SPS, + H264_ATTR_KEY_PPS = H264_ATTR_KEY_SPS + H264_MAX_SPS_PPS_SIZE, + H264_ATTR_KEY_END = H264_ATTR_KEY_PPS + H264_MAX_SPS_PPS_SIZE, +}; + +static enum ast_format_cmp_res h264_format_attr_cmp(const struct ast_format_attr *fattr1, const struct ast_format_attr *fattr2) +{ + unsigned int idc1 = fattr1->format_attr[H264_ATTR_KEY_PROFILE_IDC] ? fattr1->format_attr[H264_ATTR_KEY_PROFILE_IDC] : 0x42; + unsigned int idc2 = fattr2->format_attr[H264_ATTR_KEY_PROFILE_IDC] ? fattr2->format_attr[H264_ATTR_KEY_PROFILE_IDC] : 0x42; + + /* We are as permissive as possible to ensure the maximum number of calls succeed */ + return (idc1 == idc2) ? AST_FORMAT_CMP_EQUAL : AST_FORMAT_CMP_NOT_EQUAL; +} + +static int h264_format_attr_get_joint(const struct ast_format_attr *fattr1, const struct ast_format_attr *fattr2, struct ast_format_attr *result) +{ + int i; + + for (i = H264_ATTR_KEY_PROFILE_IDC; i < H264_ATTR_KEY_END; i++) { + result->format_attr[i] = fattr1->format_attr[i] ? fattr1->format_attr[i] : fattr2->format_attr[i]; + } + + return 0; +} + +static int h264_format_attr_sdp_parse(struct ast_format_attr *format_attr, const char *attributes) +{ + char *attribs = ast_strdupa(attributes), *attrib; + + format_attr->format_attr[H264_ATTR_KEY_REDUNDANT_PIC_CAP] = H264_ATTR_KEY_UNSET; + format_attr->format_attr[H264_ATTR_KEY_PARAMETER_ADD] = H264_ATTR_KEY_UNSET; + format_attr->format_attr[H264_ATTR_KEY_PACKETIZATION_MODE] = H264_ATTR_KEY_UNSET; + format_attr->format_attr[H264_ATTR_KEY_LEVEL_ASYMMETRY_ALLOWED] = H264_ATTR_KEY_UNSET; + + while ((attrib = strsep(&attribs, ";"))) { + unsigned int val; + unsigned long int val2; + char sps[H264_MAX_SPS_PPS_SIZE], pps[H264_MAX_SPS_PPS_SIZE]; + + if (sscanf(attrib, "profile-level-id=%lx", &val2) == 1) { + format_attr->format_attr[H264_ATTR_KEY_PROFILE_IDC] = ((val2 >> 16) & 0xFF); + format_attr->format_attr[H264_ATTR_KEY_PROFILE_IOP] = ((val2 >> 8) & 0xFF); + format_attr->format_attr[H264_ATTR_KEY_LEVEL] = (val2 & 0xFF); + } else if (sscanf(attrib, "sprop-parameter-sets=%[^','],%s", sps, pps) == 2) { + unsigned char spsdecoded[H264_MAX_SPS_PPS_SIZE] = { 0, }, ppsdecoded[H264_MAX_SPS_PPS_SIZE] = { 0, }; + int i; + + ast_base64decode(spsdecoded, sps, sizeof(spsdecoded)); + ast_base64decode(ppsdecoded, pps, sizeof(ppsdecoded)); + + format_attr->format_attr[H264_ATTR_KEY_SPS_LEN] = 0; + format_attr->format_attr[H264_ATTR_KEY_PPS_LEN] = 0; + + for (i = 0; i < H264_MAX_SPS_PPS_SIZE; i++) { + if (spsdecoded[i]) { + format_attr->format_attr[H264_ATTR_KEY_SPS + i] = spsdecoded[i]; + format_attr->format_attr[H264_ATTR_KEY_SPS_LEN]++; + } + if (ppsdecoded[i]) { + format_attr->format_attr[H264_ATTR_KEY_PPS + i] = ppsdecoded[i]; + format_attr->format_attr[H264_ATTR_KEY_PPS_LEN]++; + } + } + } else if (sscanf(attrib, "max-mbps=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_MAX_MBPS] = val; + } else if (sscanf(attrib, "max-fs=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_MAX_FS] = val; + } else if (sscanf(attrib, "max-cpb=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_MAX_CPB] = val; + } else if (sscanf(attrib, "max-dpb=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_MAX_DPB] = val; + } else if (sscanf(attrib, "max-br=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_MAX_BR] = val; + } else if (sscanf(attrib, "redundant-pic-cap=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_REDUNDANT_PIC_CAP] = val; + } else if (sscanf(attrib, "parameter-add=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_PARAMETER_ADD] = val; + } else if (sscanf(attrib, "packetization-mode=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_PACKETIZATION_MODE] = val; + } else if (sscanf(attrib, "sprop-interleaving-depth=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_SPROP_INTERLEAVING_DEPTH] = val; + } else if (sscanf(attrib, "sprop-deint-buf-req=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_SPROP_DEINT_BUF_REQ] = val; + } else if (sscanf(attrib, "deint-buf-cap=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_DEINT_BUF_CAP] = val; + } else if (sscanf(attrib, "sprop-init-buf-time=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_SPROP_INIT_BUF_TIME] = val; + } else if (sscanf(attrib, "sprop-max-don-diff=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_SPROP_MAX_DON_DIFF] = val; + } else if (sscanf(attrib, "max-rcmd-nalu-size=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_MAX_RCMD_NALU_SIZE] = val; + } else if (sscanf(attrib, "level-asymmetry-allowed=%30u", &val) == 1) { + format_attr->format_attr[H264_ATTR_KEY_LEVEL_ASYMMETRY_ALLOWED] = val; + } + } + + return 0; +} + +/*! \brief Helper function which converts a key enum into a string value for SDP */ +static const char *h264_attr_key_to_str(enum h264_attr_keys key) +{ + switch (key) { + case H264_ATTR_KEY_MAX_MBPS: + return "max-mbps"; + case H264_ATTR_KEY_MAX_FS: + return "max-fs"; + case H264_ATTR_KEY_MAX_CPB: + return "max-cpb"; + case H264_ATTR_KEY_MAX_DPB: + return "max-dpb"; + case H264_ATTR_KEY_MAX_BR: + return "max-br"; + case H264_ATTR_KEY_REDUNDANT_PIC_CAP: + return "redundant-pic-cap"; + case H264_ATTR_KEY_PARAMETER_ADD: + return "parameter-add"; + case H264_ATTR_KEY_PACKETIZATION_MODE: + return "packetization-mode"; + case H264_ATTR_KEY_SPROP_INTERLEAVING_DEPTH: + return "sprop-interleaving-depth"; + case H264_ATTR_KEY_SPROP_DEINT_BUF_REQ: + return "sprop-deint-buf-req"; + case H264_ATTR_KEY_DEINT_BUF_CAP: + return "deint-buf-cap"; + case H264_ATTR_KEY_SPROP_INIT_BUF_TIME: + return "sprop-init-buf-time"; + case H264_ATTR_KEY_SPROP_MAX_DON_DIFF: + return "sprop-max-don-diff"; + case H264_ATTR_KEY_MAX_RCMD_NALU_SIZE: + return "max-rcmd-nalu-size"; + case H264_ATTR_KEY_LEVEL_ASYMMETRY_ALLOWED: + return "level-asymmetry-allowed"; + default: + return NULL; + } + + return NULL; +} + +/*! \brief Helper function which determines if the value of an attribute can be placed into the SDP */ +static int h264_attr_key_addable(const struct ast_format_attr *format_attr, enum h264_attr_keys key) +{ + switch (key) { + case H264_ATTR_KEY_REDUNDANT_PIC_CAP: + case H264_ATTR_KEY_PARAMETER_ADD: + case H264_ATTR_KEY_PACKETIZATION_MODE: + case H264_ATTR_KEY_LEVEL_ASYMMETRY_ALLOWED: + return (format_attr->format_attr[key] != H264_ATTR_KEY_UNSET) ? 1 : 0; + default: + return format_attr->format_attr[key] ? 1 : 0; + } + + return 1; +} + +static void h264_format_attr_sdp_generate(const struct ast_format_attr *format_attr, unsigned int payload, struct ast_str **str) +{ + int i, added = 0; + + for (i = H264_ATTR_KEY_PROFILE_IDC; i < H264_ATTR_KEY_END; i++) { + const char *name; + + if (i == H264_ATTR_KEY_SPS && format_attr->format_attr[H264_ATTR_KEY_SPS] && format_attr->format_attr[H264_ATTR_KEY_PPS]) { + unsigned char spsdecoded[H264_MAX_SPS_PPS_SIZE] = { 0, }, ppsdecoded[H264_MAX_SPS_PPS_SIZE] = { 0, }; + int pos; + char sps[H264_MAX_SPS_PPS_SIZE], pps[H264_MAX_SPS_PPS_SIZE]; + + for (pos = 0; pos < H264_MAX_SPS_PPS_SIZE; pos++) { + spsdecoded[pos] = format_attr->format_attr[H264_ATTR_KEY_SPS + pos]; + ppsdecoded[pos] = format_attr->format_attr[H264_ATTR_KEY_PPS + pos]; + } + + ast_base64encode(sps, spsdecoded, format_attr->format_attr[H264_ATTR_KEY_SPS_LEN], H264_MAX_SPS_PPS_SIZE); + ast_base64encode(pps, ppsdecoded, format_attr->format_attr[H264_ATTR_KEY_PPS_LEN], H264_MAX_SPS_PPS_SIZE); + + if (!added) { + ast_str_append(str, 0, "a=fmtp:%d sprop-parameter-sets=%s,%s", payload, sps, pps); + added = 1; + } else { + ast_str_append(str, 0, ";sprop-parameter-sets=%s,%s", sps, pps); + } + } else if (i == H264_ATTR_KEY_PROFILE_IDC && format_attr->format_attr[H264_ATTR_KEY_PROFILE_IDC] && + format_attr->format_attr[H264_ATTR_KEY_PROFILE_IOP] && format_attr->format_attr[H264_ATTR_KEY_LEVEL]) { + if (!added) { + ast_str_append(str, 0, "a=fmtp:%d profile-level-id=%X%X%X", payload, format_attr->format_attr[H264_ATTR_KEY_PROFILE_IDC], + format_attr->format_attr[H264_ATTR_KEY_PROFILE_IOP], format_attr->format_attr[H264_ATTR_KEY_LEVEL]); + added = 1; + } else { + ast_str_append(str, 0, ";profile-level-id=%X%X%X", format_attr->format_attr[H264_ATTR_KEY_PROFILE_IDC], + format_attr->format_attr[H264_ATTR_KEY_PROFILE_IOP], format_attr->format_attr[H264_ATTR_KEY_LEVEL]); + } + } else if ((name = h264_attr_key_to_str(i)) && h264_attr_key_addable(format_attr, i)) { + 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 struct ast_format_attr_interface h264_format_attr_interface = { + .id = AST_FORMAT_H264, + .format_attr_cmp = h264_format_attr_cmp, + .format_attr_get_joint = h264_format_attr_get_joint, + .format_attr_sdp_parse = h264_format_attr_sdp_parse, + .format_attr_sdp_generate = h264_format_attr_sdp_generate, +}; + +static int unload_module(void) +{ + ast_format_attr_unreg_interface(&h264_format_attr_interface); + + return 0; +} + +static int load_module(void) +{ + if (ast_format_attr_reg_interface(&h264_format_attr_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", + .load = load_module, + .unload = unload_module, + .load_pri = AST_MODPRI_DEFAULT, +); |