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Diffstat (limited to 'modules/avcodec/h26x.h')
| -rw-r--r-- | modules/avcodec/h26x.h | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/modules/avcodec/h26x.h b/modules/avcodec/h26x.h new file mode 100644 index 0000000..7a21696 --- /dev/null +++ b/modules/avcodec/h26x.h @@ -0,0 +1,165 @@ +/** + * @file h26x.h Interface to H.26x video codecs + * + * Copyright (C) 2010 Creytiv.com + */ + + +/* + * H.263 + */ + + +enum h263_mode { + H263_MODE_A, + H263_MODE_B, + H263_MODE_C +}; + +enum { + H263_HDR_SIZE_MODEA = 4, + H263_HDR_SIZE_MODEB = 8, + H263_HDR_SIZE_MODEC = 12 +}; + +/** H.263 picture size format */ +enum h263_fmt { + H263_FMT_SQCIF = 1, /**< 128 x 96 */ + H263_FMT_QCIF = 2, /**< 176 x 144 */ + H263_FMT_CIF = 3, /**< 352 x 288 */ + H263_FMT_4CIF = 4, /**< 704 x 576 */ + H263_FMT_16CIF = 5, /**< 1408 x 1152 */ + H263_FMT_OTHER = 7, +}; + +/** + * H.263 Header defined in RFC 2190 + */ +struct h263_hdr { + + /* common */ + unsigned f:1; /**< 1 bit - Flag; 0=mode A, 1=mode B/C */ + unsigned p:1; /**< 1 bit - PB-frames, 0=mode B, 1=mode C */ + unsigned sbit:3; /**< 3 bits - Start Bit Position (SBIT) */ + unsigned ebit:3; /**< 3 bits - End Bit Position (EBIT) */ + unsigned src:3; /**< 3 bits - Source format */ + + /* mode A */ + unsigned i:1; /**< 1 bit - 0=intra-coded, 1=inter-coded */ + unsigned u:1; /**< 1 bit - Unrestricted Motion Vector */ + unsigned s:1; /**< 1 bit - Syntax-based Arithmetic Coding */ + unsigned a:1; /**< 1 bit - Advanced Prediction option */ + unsigned r:4; /**< 4 bits - Reserved (zero) */ + unsigned dbq:2; /**< 2 bits - DBQUANT */ + unsigned trb:3; /**< 3 bits - Temporal Reference for B-frame */ + unsigned tr:8; /**< 8 bits - Temporal Reference for P-frame */ + + /* mode B */ + unsigned quant:5; //=0 for GOB header + unsigned gobn:5; // gob number + unsigned mba:9; // address + unsigned hmv1:7; // horizontal motion vector + unsigned vmv1:7; // vertical motion vector + unsigned hmv2:7; + unsigned vmv2:7; + + +}; + +enum {I_FRAME=0, P_FRAME=1}; + +/** H.263 bit-stream header */ +struct h263_strm { + uint8_t psc[2]; /**< Picture Start Code (PSC) */ + + uint8_t temp_ref; /**< Temporal Reference */ + unsigned split_scr:1; /**< Split Screen Indicator */ + unsigned doc_camera:1; /**< Document Camera Indicator */ + unsigned pic_frz_rel:1; /**< Full Picture Freeze Release */ + unsigned src_fmt:3; /**< Source Format. 3=CIF */ + unsigned pic_type:1; /**< Picture Coding Type. 0=I, 1=P */ + unsigned umv:1; /**< Unrestricted Motion Vector mode */ + unsigned sac:1; /**< Syntax-based Arithmetic Coding */ + unsigned apm:1; /**< Advanced Prediction mode */ + unsigned pb:1; /**< PB-frames mode */ + unsigned pquant:5; /**< Quantizer Information */ + unsigned cpm:1; /**< Continuous Presence Multipoint */ + unsigned pei:1; /**< Extra Insertion Information */ + /* H.263 bit-stream ... */ +}; + +int h263_hdr_encode(const struct h263_hdr *hdr, struct mbuf *mb); +int h263_hdr_decode(struct h263_hdr *hdr, struct mbuf *mb); +enum h263_mode h263_hdr_mode(const struct h263_hdr *hdr); + +const uint8_t *h263_strm_find_psc(const uint8_t *p, uint32_t size); +int h263_strm_decode(struct h263_strm *s, struct mbuf *mb); +void h263_hdr_copy_strm(struct h263_hdr *hdr, const struct h263_strm *s); + + +/* + * H.264 + */ + + +/** NAL unit types (RFC 3984, Table 1) */ +enum { + H264_NAL_UNKNOWN = 0, + /* 1-23 NAL unit Single NAL unit packet per H.264 */ + H264_NAL_SLICE = 1, + H264_NAL_DPA = 2, + H264_NAL_DPB = 3, + H264_NAL_DPC = 4, + H264_NAL_IDR_SLICE = 5, + H264_NAL_SEI = 6, + H264_NAL_SPS = 7, + H264_NAL_PPS = 8, + H264_NAL_AUD = 9, + H264_NAL_END_SEQUENCE = 10, + H264_NAL_END_STREAM = 11, + H264_NAL_FILLER_DATA = 12, + H264_NAL_SPS_EXT = 13, + H264_NAL_AUX_SLICE = 19, + + H264_NAL_STAP_A = 24, /**< Single-time aggregation packet */ + H264_NAL_STAP_B = 25, /**< Single-time aggregation packet */ + H264_NAL_MTAP16 = 26, /**< Multi-time aggregation packet */ + H264_NAL_MTAP24 = 27, /**< Multi-time aggregation packet */ + H264_NAL_FU_A = 28, /**< Fragmentation unit */ + H264_NAL_FU_B = 29, /**< Fragmentation unit */ +}; + +/** + * H.264 Header defined in RFC 3984 + * + * <pre> + +---------------+ + |0|1|2|3|4|5|6|7| + +-+-+-+-+-+-+-+-+ + |F|NRI| Type | + +---------------+ + * </pre> + */ +struct h264_hdr { + unsigned f:1; /**< 1 bit - Forbidden zero bit (must be 0) */ + unsigned nri:2; /**< 2 bits - nal_ref_idc */ + unsigned type:5; /**< 5 bits - nal_unit_type */ +}; + +int h264_hdr_encode(const struct h264_hdr *hdr, struct mbuf *mb); +int h264_hdr_decode(struct h264_hdr *hdr, struct mbuf *mb); + +/** Fragmentation Unit header */ +struct fu { + unsigned s:1; /**< Start bit */ + unsigned e:1; /**< End bit */ + unsigned r:1; /**< The Reserved bit MUST be equal to 0 */ + unsigned type:5; /**< The NAL unit payload type */ +}; + +int fu_hdr_encode(const struct fu *fu, struct mbuf *mb); +int fu_hdr_decode(struct fu *fu, struct mbuf *mb); + +const uint8_t *h264_find_startcode(const uint8_t *p, const uint8_t *end); + +int h264_decode_sprop_params(AVCodecContext *codec, struct pl *pl); |