/***************************************************************************** * desc_7a.h: ETSI EN 300 468 Descriptor 0x7a: Enhanced AC-3 descriptor ***************************************************************************** * Copyright (C) 2009-2010 VideoLAN * * Authors: Christophe Massiot * Georgi Chorbadzhiyski * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject * to the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *****************************************************************************/ /* * Normative references: * - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems) */ #ifndef __BITSTREAM_DVB_DESC_7A_H__ #define __BITSTREAM_DVB_DESC_7A_H__ #include #include #ifdef __cplusplus extern "C" { #endif /***************************************************************************** * Descriptor 0x7a: Enhanced AC-3 descriptor *****************************************************************************/ #define DESC7A_HEADER_SIZE (DESC_HEADER_SIZE + 1) static inline void desc7a_init(uint8_t *p_desc) { desc_set_tag(p_desc, 0x7a); desc_set_length(p_desc, (DESC7A_HEADER_SIZE - DESC_HEADER_SIZE)); p_desc[2] = 0x00; } static inline void desc7a_clear_flags(uint8_t *p_desc) { p_desc[2] = 0x00; } #define DEFINE_AC3_FLAG(FLAGNAME, bit) \ static inline bool desc7a_get_##FLAGNAME##_flag(const uint8_t *p_desc) \ { \ return (p_desc[2] & bit) == bit; \ } \ \ static inline void desc7a_set_##FLAGNAME##_flag(uint8_t *p_desc, bool b_##FLAGNAME) \ { \ p_desc[2] = b_##FLAGNAME ? (p_desc[2] | bit) : (p_desc[2] &~ bit); \ } #define DEFINE_AC3_VALUE(VALUENAME, ofs) \ static inline uint8_t desc7a_get_##VALUENAME(const uint8_t *p_desc) \ { \ if (!desc7a_get_##VALUENAME##_flag(p_desc)) return 0; \ return p_desc[ofs]; \ } \ \ static inline void desc7a_set_##VALUENAME(uint8_t *p_desc, uint8_t i_##VALUENAME) \ { \ if (!desc7a_get_##VALUENAME##_flag(p_desc)) return; \ p_desc[ofs] = i_##VALUENAME; \ } DEFINE_AC3_FLAG (component_type, 0x80) DEFINE_AC3_VALUE(component_type, DESC7A_HEADER_SIZE) DEFINE_AC3_FLAG (bsid, 0x40) DEFINE_AC3_VALUE(bsid, DESC7A_HEADER_SIZE + desc7a_get_component_type_flag(p_desc)) DEFINE_AC3_FLAG (mainid, 0x20) DEFINE_AC3_VALUE(mainid, DESC7A_HEADER_SIZE + desc7a_get_component_type_flag(p_desc) + desc7a_get_bsid_flag(p_desc)) DEFINE_AC3_FLAG (asvc, 0x10) DEFINE_AC3_VALUE(asvc, DESC7A_HEADER_SIZE + desc7a_get_component_type_flag(p_desc) + desc7a_get_bsid_flag(p_desc) + desc7a_get_mainid_flag(p_desc)) DEFINE_AC3_FLAG (mixinfoexists, 0x08) DEFINE_AC3_FLAG (substream1, 0x04) DEFINE_AC3_VALUE(substream1, DESC7A_HEADER_SIZE + desc7a_get_component_type_flag(p_desc) + desc7a_get_bsid_flag(p_desc) + desc7a_get_mainid_flag(p_desc) + desc7a_get_asvc_flag(p_desc)) DEFINE_AC3_FLAG (substream2, 0x02) DEFINE_AC3_VALUE(substream2, DESC7A_HEADER_SIZE + desc7a_get_component_type_flag(p_desc) + desc7a_get_bsid_flag(p_desc) + desc7a_get_mainid_flag(p_desc) + desc7a_get_asvc_flag(p_desc) + desc7a_get_substream1_flag(p_desc)) DEFINE_AC3_FLAG (substream3, 0x01) DEFINE_AC3_VALUE(substream3, DESC7A_HEADER_SIZE + desc7a_get_component_type_flag(p_desc) + desc7a_get_bsid_flag(p_desc) + desc7a_get_mainid_flag(p_desc) + desc7a_get_asvc_flag(p_desc) + desc7a_get_substream1_flag(p_desc) + desc7a_get_substream2_flag(p_desc)) #undef DEFINE_AC3_FLAG #undef DEFINE_AC3_VALUE static inline void desc7a_set_length(uint8_t *p_desc) { uint8_t i_size = (DESC7A_HEADER_SIZE - DESC_HEADER_SIZE) + desc7a_get_component_type_flag(p_desc) + desc7a_get_bsid_flag(p_desc) + desc7a_get_mainid_flag(p_desc) + desc7a_get_asvc_flag(p_desc) + desc7a_get_substream1_flag(p_desc) + desc7a_get_substream2_flag(p_desc) + desc7a_get_substream3_flag(p_desc); return desc_set_length(p_desc, i_size); } static inline bool desc7a_validate(const uint8_t *p_desc) { uint8_t i_size = (DESC7A_HEADER_SIZE - DESC_HEADER_SIZE) + desc7a_get_component_type_flag(p_desc) + desc7a_get_bsid_flag(p_desc) + desc7a_get_mainid_flag(p_desc) + desc7a_get_asvc_flag(p_desc) + desc7a_get_substream1_flag(p_desc) + desc7a_get_substream2_flag(p_desc) + desc7a_get_substream3_flag(p_desc); return desc_get_length(p_desc) >= i_size; } static inline void desc7a_print(const uint8_t *p_desc, f_print pf_print, void *opaque, print_type_t i_print_type) { switch (i_print_type) { case PRINT_XML: pf_print(opaque, "", desc7a_get_component_type_flag(p_desc), desc7a_get_component_type(p_desc), desc7a_get_bsid_flag(p_desc), desc7a_get_bsid(p_desc), desc7a_get_mainid_flag(p_desc), desc7a_get_mainid(p_desc), desc7a_get_asvc_flag(p_desc), desc7a_get_asvc(p_desc), desc7a_get_mixinfoexists_flag(p_desc), desc7a_get_substream1_flag(p_desc), desc7a_get_substream1(p_desc), desc7a_get_substream2_flag(p_desc), desc7a_get_substream2(p_desc), desc7a_get_substream3_flag(p_desc), desc7a_get_substream3(p_desc) ); break; default: pf_print(opaque, " - desc 7a ac3 component_type_flag=%u component_type=%u" " bsid_flag=%u bsid=%u" " mainid_flag=%u mainid=%u" " asvc_flag=%u asvc=%u" " mixinfoexists=%u" " substream1_flag=%u substream1=%u" " substream2_flag=%u substream2=%u" " substream3_flag=%u substream3=%u", desc7a_get_component_type_flag(p_desc), desc7a_get_component_type(p_desc), desc7a_get_bsid_flag(p_desc), desc7a_get_bsid(p_desc), desc7a_get_mainid_flag(p_desc), desc7a_get_mainid(p_desc), desc7a_get_asvc_flag(p_desc), desc7a_get_asvc(p_desc), desc7a_get_mixinfoexists_flag(p_desc), desc7a_get_substream1_flag(p_desc), desc7a_get_substream1(p_desc), desc7a_get_substream2_flag(p_desc), desc7a_get_substream2(p_desc), desc7a_get_substream3_flag(p_desc), desc7a_get_substream3(p_desc) ); } } #ifdef __cplusplus } #endif #endif