/* * 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; DCTransformPtr *dc_transform; int is_2d_trans; ///< 1 indicates that the two-dimensional inverse transform is used int transform_size; ///< block size of the transform 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 */