00001 #ifndef __OGGSTREAMS_H 00002 #define __OGGSTREAMS_H 00003 00004 /* 00005 * Taken from http://tobias.everwicked.com/packfmt.htm 00006 * 00007 00008 First packet (header) 00009 --------------------- 00010 00011 pos | content | description 00012 -------+-------------------------+---------------------------------- 00013 0x0000 | 0x01 | indicates 'header packet' 00014 -------+-------------------------+---------------------------------- 00015 0x0001 | stream_header | the size is indicated in the 00016 | | size member 00017 00018 00019 Second packet (comment) 00020 ----------------------- 00021 00022 pos | content | description 00023 -------+-------------------------+---------------------------------- 00024 0x0000 | 0x03 | indicates 'comment packet' 00025 -------+-------------------------+---------------------------------- 00026 0x0001 | data | see vorbis doc on www.xiph.org 00027 00028 Data packets 00029 ------------ 00030 00031 pos | content | description 00032 ---------+-------------------------+---------------------------------- 00033 0x0000 | Bit0 0 | indicates data packet 00034 | Bit1 Bit 2 of lenbytes | 00035 | Bit2 unused | 00036 | Bit3 keyframe | 00037 | Bit4 unused | 00038 | Bit5 unused | 00039 | Bit6 Bit 0 of lenbytes | 00040 | Bit7 Bit 1 of lenbytes | 00041 ---------+-------------------------+---------------------------------- 00042 0x0001 | LowByte | Length of this packet in samples 00043 | ... | (frames for video, samples for 00044 | HighByte | audio, 1ms units for text) 00045 ---------+-------------------------+---------------------------------- 00046 0x0001+ | data | packet contents 00047 lenbytes | | 00048 00049 * 00050 * 00051 */ 00052 00054 // Header for the new header format 00055 typedef struct stream_header_video { 00056 ogg_int32_t width; 00057 ogg_int32_t height; 00058 } stream_header_video; 00059 00060 typedef struct stream_header_audio { 00061 ogg_int16_t channels; 00062 ogg_int16_t blockalign; 00063 ogg_int32_t avgbytespersec; 00064 } stream_header_audio; 00065 00066 typedef struct stream_header { 00067 char streamtype[8]; // "audio" 00068 char subtype[4]; // "0001" - i.e. PCM 00069 00070 ogg_int32_t size; // size of the structure 00071 00072 ogg_int64_t time_unit; // in reference time 00073 ogg_int64_t samples_per_unit; 00074 ogg_int32_t default_len; // in media time 00075 00076 ogg_int32_t buffersize; 00077 // ogg_int16_t bits_per_sample; 00078 ogg_int32_t bits_per_sample; 00079 00080 union { 00081 // Video specific 00082 stream_header_video video; 00083 // Audio specific 00084 stream_header_audio audio; 00085 } sh; 00086 00087 // ogg_int16_t padding; 00088 ogg_int32_t padding; 00089 00090 } stream_header; 00091 00092 typedef struct old_stream_header { 00093 char streamtype[8]; 00094 char subtype[4]; 00095 00096 ogg_int32_t size; // size of the structure 00097 00098 ogg_int64_t time_unit; // in reference time 00099 ogg_int64_t samples_per_unit; 00100 ogg_int32_t default_len; // in media time 00101 00102 ogg_int32_t buffersize; 00103 ogg_int16_t bits_per_sample; 00104 00105 ogg_int16_t padding; 00106 00107 union { 00108 // Video specific 00109 stream_header_video video; 00110 // Audio specific 00111 stream_header_audio audio; 00112 } sh; 00113 00114 } old_stream_header; 00115 00117 #define PACKET_TYPE_HEADER 0x01 00118 #define PACKET_TYPE_COMMENT 0x03 00119 #define PACKET_TYPE_BITS 0x07 00120 #define PACKET_LEN_BITS01 0xc0 00121 #define PACKET_LEN_BITS2 0x02 00122 #define PACKET_IS_SYNCPOINT 0x08 00123 00124 #endif /* __OGGSTREAMS_H */
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