diff options
author | Joshua Colp <jcolp@digium.com> | 2012-07-13 18:41:07 +0000 |
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committer | Joshua Colp <jcolp@digium.com> | 2012-07-13 18:41:07 +0000 |
commit | acb5f5f82400e1849f75bdfebf6834730055736f (patch) | |
tree | c68d7630dec3732c6ff1d6f27d4ad1ee9703ade0 /res/res_format_attr_h263.c | |
parent | a693fd1d8738a302082bb8e453c0fe69679f4c46 (diff) |
Reduce memory consumption and add the H.264 and H.263 modules I shamefully neglected to add.
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@370060 65c4cc65-6c06-0410-ace0-fbb531ad65f3
Diffstat (limited to 'res/res_format_attr_h263.c')
-rw-r--r-- | res/res_format_attr_h263.c | 295 |
1 files changed, 295 insertions, 0 deletions
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, +); |