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/**
* @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
*/
int h264_decode_sprop_params(AVCodecContext *codec, struct pl *pl);
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