Christophe Massiot
14 years ago
committed by
Georgi Chorbadzhiyski
Georgi Chorbadzhiyski
3 changed files with 192 additions and 142 deletions
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+3 -1Makefile
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+1 -141mpeg/psi.h
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+188 -0mpeg/psi/descriptors.h
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Makefile
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mpeg/psi.h
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mpeg/psi/descriptors.h
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| @ -0,0 +1,188 @@ | |||||
| /***************************************************************************** | |||||
| * descriptors.h: ISO/IEC 13818-1 descriptors | |||||
| ***************************************************************************** | |||||
| * Copyright (C) 2009-2010 VideoLAN | |||||
| * | |||||
| * Authors: Christophe Massiot <massiot@via.ecp.fr> | |||||
| * | |||||
| * 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: | |||||
| * - ISO/IEC 13818-1:2007(E) (MPEG-2 Systems) | |||||
| */ | |||||
| #ifndef __BITSTREAM_MPEG_DESCRIPTORS_H__ | |||||
| #define __BITSTREAM_MPEG_DESCRIPTORS_H__ | |||||
| #include <bitstream/common.h> | |||||
| #ifdef __cplusplus | |||||
| extern "C" | |||||
| { | |||||
| #endif | |||||
| /***************************************************************************** | |||||
| * Descriptor | |||||
| *****************************************************************************/ | |||||
| #define DESC_HEADER_SIZE 2 | |||||
| static inline void desc_set_tag(uint8_t *p_desc, uint8_t i_tag) | |||||
| { | |||||
| p_desc[0] = i_tag; | |||||
| } | |||||
| static inline uint8_t desc_get_tag(const uint8_t *p_desc) | |||||
| { | |||||
| return p_desc[0]; | |||||
| } | |||||
| static inline void desc_set_length(uint8_t *p_desc, uint8_t i_length) | |||||
| { | |||||
| p_desc[1] = i_length; | |||||
| } | |||||
| static inline uint8_t desc_get_length(const uint8_t *p_desc) | |||||
| { | |||||
| return p_desc[1]; | |||||
| } | |||||
| static inline void desc_print_begin(const uint8_t *p_desc, f_print pf_print, | |||||
| void *opaque, print_type_t i_print_type) | |||||
| { | |||||
| switch (i_print_type) { | |||||
| case PRINT_XML: | |||||
| { | |||||
| uint8_t i, i_length = desc_get_length(p_desc); | |||||
| char psz_value[2 * i_length + 1]; | |||||
| for (i = 0; i < i_length; i++) | |||||
| sprintf(psz_value + 2 * i, "%2.2hhx", p_desc[2 + i]); | |||||
| psz_value[2 * i] = '\0'; | |||||
| pf_print(opaque, "<DESC id=\"%hhu\" value=\"%s\">", | |||||
| desc_get_tag(p_desc), psz_value); | |||||
| break; | |||||
| } | |||||
| default: | |||||
| break; | |||||
| } | |||||
| } | |||||
| static inline void desc_print_end(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, "</DESC>"); | |||||
| break; | |||||
| default: | |||||
| break; | |||||
| } | |||||
| } | |||||
| static inline void desc_print_error(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, "<INVALID_DESC />"); | |||||
| break; | |||||
| default: | |||||
| pf_print(opaque, "desc %2.2hhx invalid", desc_get_tag(p_desc)); | |||||
| } | |||||
| } | |||||
| static inline void desc_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, "<UNKNOWN_DESC />"); | |||||
| break; | |||||
| default: | |||||
| pf_print(opaque, " - desc %2.2hhx unknown", desc_get_tag(p_desc)); | |||||
| } | |||||
| } | |||||
| /***************************************************************************** | |||||
| * Descriptors list | |||||
| *****************************************************************************/ | |||||
| static inline uint8_t *descl_get_desc(uint8_t *p_descl, uint16_t i_length, | |||||
| uint16_t n) | |||||
| { | |||||
| uint8_t *p_desc = p_descl; | |||||
| while (n) { | |||||
| if (p_desc + DESC_HEADER_SIZE - p_descl > i_length) return NULL; | |||||
| p_desc += DESC_HEADER_SIZE + desc_get_length(p_desc); | |||||
| n--; | |||||
| } | |||||
| if (p_desc - p_descl >= i_length) return NULL; | |||||
| return p_desc; | |||||
| } | |||||
| static inline bool descl_validate(const uint8_t *p_descl, uint16_t i_length) | |||||
| { | |||||
| const uint8_t *p_desc = p_descl; | |||||
| while (p_desc + DESC_HEADER_SIZE - p_descl <= i_length) | |||||
| p_desc += DESC_HEADER_SIZE + desc_get_length(p_desc); | |||||
| return (p_desc - p_descl == i_length); | |||||
| } | |||||
| /***************************************************************************** | |||||
| * Descriptors structure | |||||
| *****************************************************************************/ | |||||
| #define DESCS_HEADER_SIZE 2 | |||||
| #define DESCS_MAX_SIZE 4095 | |||||
| static inline void descs_set_length(uint8_t *p_descs, uint16_t i_length) | |||||
| { | |||||
| p_descs[0] &= 0xf0; | |||||
| p_descs[0] |= (i_length >> 8) & 0xf; | |||||
| p_descs[1] = i_length & 0xff; | |||||
| } | |||||
| static inline uint16_t descs_get_length(const uint8_t *p_descs) | |||||
| { | |||||
| return ((p_descs[0] & 0xf) << 8) | p_descs[1]; | |||||
| } | |||||
| static inline uint8_t *descs_get_desc(uint8_t *p_descs, uint16_t n) | |||||
| { | |||||
| return descl_get_desc(p_descs + DESCS_HEADER_SIZE, | |||||
| descs_get_length(p_descs), n); | |||||
| } | |||||
| static inline bool descs_validate(const uint8_t *p_descs) | |||||
| { | |||||
| return descl_validate(p_descs + DESCS_HEADER_SIZE, | |||||
| descs_get_length(p_descs)); | |||||
| } | |||||
| #ifdef __cplusplus | |||||
| } | |||||
| #endif | |||||
| #endif | |||||