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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1671 | tullio | 1 | /* gethdr.c, header decoding */ |
| 2 | |||
| 3 | /* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */ |
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| 4 | |||
| 5 | /* |
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| 6 | * Disclaimer of Warranty |
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| 7 | * |
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| 8 | * These software programs are available to the user without any license fee or |
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| 9 | * royalty on an "as is" basis. The MPEG Software Simulation Group disclaims |
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| 10 | * any and all warranties, whether express, implied, or statuary, including any |
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| 11 | * implied warranties or merchantability or of fitness for a particular |
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| 12 | * purpose. In no event shall the copyright-holder be liable for any |
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| 13 | * incidental, punitive, or consequential damages of any kind whatsoever |
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| 14 | * arising from the use of these programs. |
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| 15 | * |
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| 16 | * This disclaimer of warranty extends to the user of these programs and user's |
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| 17 | * customers, employees, agents, transferees, successors, and assigns. |
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| 18 | * |
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| 19 | * The MPEG Software Simulation Group does not represent or warrant that the |
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| 20 | * programs furnished hereunder are free of infringement of any third-party |
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| 21 | * patents. |
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| 22 | * |
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| 23 | * Commercial implementations of MPEG-1 and MPEG-2 video, including shareware, |
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| 24 | * are subject to royalty fees to patent holders. Many of these patents are |
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| 25 | * general enough such that they are unavoidable regardless of implementation |
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| 26 | * design. |
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| 27 | * |
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| 28 | */ |
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| 29 | |||
| 30 | #include "config.h" |
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| 31 | #include "global.h" |
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| 32 | |||
| 33 | |||
| 34 | /* private prototypes */ |
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| 35 | static void sequence_header(void); |
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| 36 | static void group_of_pictures_header(void); |
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| 37 | static void picture_header(void); |
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| 38 | static void sequence_extension(void); |
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| 39 | static void sequence_display_extension(void); |
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| 40 | static void quant_matrix_extension(void); |
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| 41 | static void sequence_scalable_extension(void); |
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| 42 | static void picture_display_extension(void); |
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| 43 | static void picture_coding_extension(void); |
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| 44 | static void picture_spatial_scalable_extension(void); |
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| 45 | static void picture_temporal_scalable_extension(void); |
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| 46 | static int extra_bit_information(void); |
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| 47 | static void copyright_extension(void); |
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| 48 | static void user_data(void); |
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| 49 | static void user_data(void); |
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| 50 | |||
| 51 | |||
| 52 | |||
| 53 | |||
| 54 | |||
| 55 | static void Update_Temporal_Reference_Tacking_Data(void); |
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| 56 | /* private variables */ |
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| 57 | static int Temporal_Reference_Base = 0; |
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| 58 | static int Temporal_Reference_GOP_Reset = 0; |
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| 59 | |||
| 60 | #define RESERVED -1 |
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| 61 | |||
| 62 | { |
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| 63 | 0.0, |
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| 64 | ((23.0*1000.0)/1001.0), |
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| 65 | 24.0, |
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| 66 | 25.0, |
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| 67 | ((30.0*1000.0)/1001.0), |
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| 68 | 30.0, |
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| 69 | 50.0, |
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| 70 | ((60.0*1000.0)/1001.0), |
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| 71 | 60.0, |
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| 72 | |||
| 73 | RESERVED, |
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| 74 | |||
| 75 | RESERVED, |
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| 76 | RESERVED, |
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| 77 | RESERVED, |
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| 78 | RESERVED, |
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| 79 | RESERVED |
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| 80 | }; |
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| 81 | |||
| 82 | /* |
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| 83 | |||
| 84 | * until an End of Sequence or picture start code |
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| 85 | * is found |
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| 86 | */ |
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| 87 | int Get_Hdr() |
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| 88 | { |
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| 89 | unsigned int code; |
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| 90 | |||
| 91 | for (;;) |
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| 92 | |||
| 93 | /* look for next_start_code */ |
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| 94 | next_start_code(); |
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| 95 | code = Get_Bits32(); |
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| 96 | |||
| 97 | } |
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| 98 | |||
| 99 | |||
| 100 | |||
| 101 | |||
| 102 |