Christophe Massiot
13 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 | |||