/*
* common functions for Indeo Video Interactive codecs (Indeo4 and Indeo5)
*
* Copyright (c) 2009 Maxim Poliakovski
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* This file contains structures and macros shared by both Indeo4 and
* Indeo5 decoders.
*/
#ifndef AVCODEC_IVI_COMMON_H
#define AVCODEC_IVI_COMMON_H
#include "avcodec.h"
#include "get_bits.h"
#include <stdint.h>
#define IVI_VLC_BITS 13 ///< max number of bits of the ivi's huffman codes
#define IVI4_STREAM_ANALYSER 0
#define IVI5_IS_PROTECTED 0x20
/**
* huffman codebook descriptor
*/
typedef struct IVIHuffDesc {
int32_t num_rows;
uint8_t xbits[16];
} IVIHuffDesc;
/**
* macroblock/block huffman table descriptor
*/
typedef struct IVIHuffTab {
int32_t tab_sel; /// index of one of the predefined tables
/// or "7" for custom one
VLC *tab; /// pointer to the table associated with tab_sel
/// the following are used only when tab_sel == 7
IVIHuffDesc cust_desc; /// custom Huffman codebook descriptor
VLC cust_tab; /// vlc table for custom codebook
} IVIHuffTab;
enum {
IVI_MB_HUFF = 0, /// Huffman table is used for coding macroblocks
IVI_BLK_HUFF = 1 /// Huffman table is used for coding blocks
};
/**
* Common scan patterns (defined in ivi_common.c)
*/
extern const uint8_t ff_ivi_vertical_scan_8x8[64];
extern const uint8_t ff_ivi_horizontal_scan_8x8[64];
extern const uint8_t ff_ivi_direct_scan_4x4[16];
/**
* Declare inverse transform function types
*/
typedef void (InvTransformPtr)(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags);
typedef void (DCTransformPtr) (const int32_t *in, int16_t *out, uint32_t pitch, int blk_size);
/**
* run-value (RLE) table descriptor
*/
typedef struct RVMapDesc {
uint8_t eob_sym; ///< end of block symbol
uint8_t esc_sym; ///< escape symbol
uint8_t runtab[256];
int8_t valtab[256];
} RVMapDesc;
extern const RVMapDesc ff_ivi_rvmap_tabs[9];
/**
* information for Indeo macroblock (16x16, 8x8 or 4x4)
*/
typedef struct IVIMbInfo {
int16_t xpos;
int16_t ypos;
uint32_t buf_offs; ///< address in the output buffer for this mb
uint8_t type; ///< macroblock type: 0 - INTRA, 1 - INTER
uint8_t cbp; ///< coded block pattern
int8_t q_delta; ///< quant delta
int8_t mv_x; ///< motion vector (x component)
int8_t mv_y; ///< motion vector (y component)
} IVIMbInfo;
/**
* information for Indeo tile
*/
typedef struct IVITile {
int xpos;
int ypos;
int width;
int height;
int mb_size;
int is_empty; ///< = 1 if this tile doesn't contain any data
int data_size; ///< size of the data in bytes
int num_MBs; ///< number of macroblocks in this tile
IVIMbInfo *mbs; ///< array of macroblock descriptors
IVIMbInfo *ref_mbs; ///< ptr to the macroblock descriptors of the reference tile
} IVITile;
/**
* information for Indeo wavelet band
*/
typedef struct IVIBandDesc {
int plane; ///< plane number this band belongs to
int band_num; ///< band number
int width;
int height;
int aheight; ///< aligned band height
const uint8_t *data_ptr; ///< ptr to the first byte of the band data
int data_size; ///< size of the band data
int16_t *buf; ///< pointer to the output buffer for this band
int16_t *ref_buf; ///< pointer to the reference frame buffer (for motion compensation)
int16_t *bufs[3]; ///< array of pointers to the band buffers
int pitch; ///< pitch associated with the buffers above
int is_empty; ///< = 1 if this band doesn't contain any data
int mb_size; ///< macroblock size
int blk_size; ///< block size
int is_halfpel; ///< precision of the motion compensation: 0 - fullpel, 1 - halfpel
int inherit_mv; ///< tells if motion vector is inherited from reference macroblock
int inherit_qdelta; ///< tells if quantiser delta is inherited from reference macroblock
int qdelta_present; ///< tells if Qdelta signal is present in the bitstream (Indeo5 only)
int quant_mat; ///< dequant matrix index
int glob_quant; ///< quant base for this band
const uint8_t *scan; ///< ptr to the scan pattern
int scan_size; ///< size of the scantable
IVIHuffTab blk_vlc; ///< vlc table for decoding block data
int num_corr; ///< number of correction entries
uint8_t corr[61*2]; ///< rvmap correction pairs
int rvmap_sel; ///< rvmap table selector
RVMapDesc *rv_map; ///< ptr to the RLE table for this band
int num_tiles; ///< number of tiles in this band
IVITile *tiles; ///< array of tile descriptors
InvTransformPtr *inv_transform;
int transform_size;
DCTransformPtr *dc_transform;
int is_2d_trans; ///< 1 indicates that the two-dimensional inverse transform is used
int32_t checksum; ///< for debug purposes
int checksum_present;
int bufsize; ///< band buffer size in bytes
const uint16_t *intra_base; ///< quantization matrix for intra blocks
const uint16_t *inter_base; ///< quantization matrix for inter blocks
const uint8_t *intra_scale; ///< quantization coefficient for intra blocks
const uint8_t *inter_scale; ///< quantization coefficient for inter blocks
} IVIBandDesc;
/**
* color plane (luma or chroma) information
*/
typedef struct IVIPlaneDesc {
uint16_t width;
uint16_t height;
uint8_t num_bands; ///< number of bands this plane subdivided into
IVIBandDesc *bands; ///< array of band descriptors
} IVIPlaneDesc;
typedef struct IVIPicConfig {
uint16_t pic_width;
uint16_t pic_height;
uint16_t chroma_width;
uint16_t chroma_height;
uint16_t tile_width;
uint16_t tile_height;
uint8_t luma_bands;
uint8_t chroma_bands;
} IVIPicConfig;
typedef struct IVI45DecContext {
GetBitContext gb;
RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables
uint32_t frame_num;
int frame_type;
int prev_frame_type; ///< frame type of the previous frame
uint32_t data_size; ///< size of the frame data in bytes from picture header
int is_scalable;
int transp_status; ///< transparency mode status: 1 - enabled
const uint8_t *frame_data; ///< input frame data pointer
int inter_scal; ///< signals a sequence of scalable inter frames
uint32_t frame_size; ///< frame size in bytes
uint32_t pic_hdr_size; ///< picture header size in bytes
uint8_t frame_flags;
uint16_t checksum; ///< frame checksum
IVIPicConfig pic_conf;
IVIPlaneDesc planes[3]; ///< color planes
int buf_switch; ///< used to switch between three buffers
int dst_buf; ///< buffer index for the currently decoded frame
int ref_buf; ///< inter frame reference buffer index
int ref2_buf; ///< temporal storage for switching buffers
IVIHuffTab mb_vlc; ///< current macroblock table descriptor
IVIHuffTab blk_vlc; ///< current block table descriptor
uint8_t rvmap_sel;
uint8_t in_imf;
uint8_t in_q; ///< flag for explicitly stored quantiser delta
uint8_t pic_glob_quant;
uint8_t unknown1;
uint16_t gop_hdr_size;
uint8_t gop_flags;
uint32_t lock_word;
#if IVI4_STREAM_ANALYSER
uint8_t has_b_frames;
uint8_t has_transp;
uint8_t uses_tiling;
uint8_t uses_haar;
uint8_t uses_fullpel;
#endif
int (*decode_pic_hdr) (struct IVI45DecContext *ctx, AVCodecContext *avctx);
int (*decode_band_hdr) (struct IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx);
int (*decode_mb_info) (struct IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx);
void (*switch_buffers) (struct IVI45DecContext *ctx);
int (*is_nonnull_frame)(struct IVI45DecContext *ctx);
int gop_invalid;
int buf_invalid[3];
} IVI45DecContext;
/** compare some properties of two pictures */
static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2)
{
return str1->pic_width != str2->pic_width || str1->pic_height != str2->pic_height ||
str1->chroma_width != str2->chroma_width || str1->chroma_height != str2->chroma_height ||
str1->tile_width != str2->tile_width || str1->tile_height != str2->tile_height ||
str1->luma_bands != str2->luma_bands || str1->chroma_bands != str2->chroma_bands;
}
/** calculate number of tiles in a stride */
#define IVI_NUM_TILES(stride, tile_size) (((stride) + (tile_size) - 1) / (tile_size))
/** calculate number of macroblocks in a tile */
#define IVI_MBs_PER_TILE(tile_width, tile_height, mb_size) \
((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size)))
/** convert unsigned values into signed ones (the sign is in the LSB) */
#define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1)))
/** scale motion vector */
static inline int ivi_scale_mv(int mv, int mv_scale)
{
return (mv + (mv > 0) + (mv_scale - 1)) >> mv_scale;
}
/**
* Initialize static codes used for macroblock and block decoding.
*/
void ff_ivi_init_static_vlc(void);
/**
* Decode a huffman codebook descriptor from the bitstream
* and select specified huffman table.
*
* @param[in,out] gb the GetBit context
* @param[in] desc_coded flag signalling if table descriptor was coded
* @param[in] which_tab codebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF)
* @param[out] huff_tab pointer to the descriptor of the selected table
* @param[in] avctx AVCodecContext pointer
* @return zero on success, negative value otherwise
*/
int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
IVIHuffTab *huff_tab, AVCodecContext *avctx);
/**
* Initialize planes (prepares descriptors, allocates buffers etc).
*
* @param[in,out] planes pointer to the array of the plane descriptors
* @param[in] cfg pointer to the ivi_pic_config structure describing picture layout
* @return result code: 0 - OK
*/
int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg);
/**
* Initialize tile and macroblock descriptors.
*
* @param[in,out] planes pointer to the array of the plane descriptors
* @param[in] tile_width tile width
* @param[in] tile_height tile height
* @return result code: 0 - OK
*/
int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height);
int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt);
int ff_ivi_decode_close(AVCodecContext *avctx);
#endif /* AVCODEC_IVI_COMMON_H */