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/* |
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* common functions for Indeo Video Interactive codecs (Indeo4 and Indeo5) |
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* |
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* Copyright (c) 2009 Maxim Poliakovski |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* This file contains structures and macros shared by both Indeo4 and |
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* Indeo5 decoders. |
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*/ |
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#ifndef AVCODEC_IVI_H |
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#define AVCODEC_IVI_H |
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#include "avcodec.h" |
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#include "get_bits.h" |
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#include <stdint.h> |
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/** |
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* Indeo 4 frame types. |
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*/ |
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enum { |
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IVI4_FRAMETYPE_INTRA = 0, |
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IVI4_FRAMETYPE_INTRA1 = 1, ///< intra frame with slightly different bitstream coding |
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IVI4_FRAMETYPE_INTER = 2, ///< non-droppable P-frame |
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IVI4_FRAMETYPE_BIDIR = 3, ///< bidirectional frame |
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IVI4_FRAMETYPE_INTER_NOREF = 4, ///< droppable P-frame |
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IVI4_FRAMETYPE_NULL_FIRST = 5, ///< empty frame with no data |
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IVI4_FRAMETYPE_NULL_LAST = 6 ///< empty frame with no data |
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}; |
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#define IVI_VLC_BITS 13 ///< max number of bits of the ivi's huffman codes |
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#define IVI5_IS_PROTECTED 0x20 |
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/** |
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* huffman codebook descriptor |
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*/ |
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typedef struct IVIHuffDesc { |
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int32_t num_rows; |
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uint8_t xbits[16]; |
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} IVIHuffDesc; |
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/** |
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* macroblock/block huffman table descriptor |
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*/ |
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typedef struct IVIHuffTab { |
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int32_t tab_sel; /// index of one of the predefined tables |
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/// or "7" for custom one |
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VLC *tab; /// pointer to the table associated with tab_sel |
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/// the following are used only when tab_sel == 7 |
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IVIHuffDesc cust_desc; /// custom Huffman codebook descriptor |
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VLC cust_tab; /// vlc table for custom codebook |
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} IVIHuffTab; |
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enum { |
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IVI_MB_HUFF = 0, /// Huffman table is used for coding macroblocks |
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IVI_BLK_HUFF = 1 /// Huffman table is used for coding blocks |
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}; |
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/** |
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* Common scan patterns (defined in ivi_common.c) |
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*/ |
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extern const uint8_t ff_ivi_vertical_scan_8x8[64]; |
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extern const uint8_t ff_ivi_horizontal_scan_8x8[64]; |
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extern const uint8_t ff_ivi_direct_scan_4x4[16]; |
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/** |
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* Declare inverse transform function types |
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*/ |
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typedef void (InvTransformPtr)(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags); |
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typedef void (DCTransformPtr) (const int32_t *in, int16_t *out, ptrdiff_t pitch, int blk_size); |
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/** |
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* run-value (RLE) table descriptor |
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*/ |
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typedef struct RVMapDesc { |
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uint8_t eob_sym; ///< end of block symbol |
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uint8_t esc_sym; ///< escape symbol |
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uint8_t runtab[256]; |
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int8_t valtab[256]; |
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} RVMapDesc; |
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extern const RVMapDesc ff_ivi_rvmap_tabs[9]; |
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/** |
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* information for Indeo macroblock (16x16, 8x8 or 4x4) |
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*/ |
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typedef struct IVIMbInfo { |
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int16_t xpos; |
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int16_t ypos; |
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uint32_t buf_offs; ///< address in the output buffer for this mb |
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uint8_t type; ///< macroblock type: 0 - INTRA, 1 - INTER |
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uint8_t cbp; ///< coded block pattern |
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int8_t q_delta; ///< quant delta |
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int8_t mv_x; ///< motion vector (x component) |
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int8_t mv_y; ///< motion vector (y component) |
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int8_t b_mv_x; ///< second motion vector (x component) |
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int8_t b_mv_y; ///< second motion vector (y component) |
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} IVIMbInfo; |
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/** |
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* information for Indeo tile |
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*/ |
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typedef struct IVITile { |
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int xpos; |
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int ypos; |
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int width; |
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int height; |
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int mb_size; |
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int is_empty; ///< = 1 if this tile doesn't contain any data |
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int data_size; ///< size of the data in bytes |
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int num_MBs; ///< number of macroblocks in this tile |
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IVIMbInfo *mbs; ///< array of macroblock descriptors |
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IVIMbInfo *ref_mbs; ///< ptr to the macroblock descriptors of the reference tile |
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} IVITile; |
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/** |
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* information for Indeo wavelet band |
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*/ |
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typedef struct IVIBandDesc { |
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int plane; ///< plane number this band belongs to |
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int band_num; ///< band number |
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int width; |
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int height; |
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int aheight; ///< aligned band height |
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const uint8_t *data_ptr; ///< ptr to the first byte of the band data |
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int data_size; ///< size of the band data |
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int16_t *buf; ///< pointer to the output buffer for this band |
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int16_t *ref_buf; ///< pointer to the reference frame buffer (for motion compensation) |
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int16_t *b_ref_buf; ///< pointer to the second reference frame buffer (for motion compensation) |
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int16_t *bufs[4]; ///< array of pointers to the band buffers |
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ptrdiff_t pitch; ///< pitch associated with the buffers above |
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int is_empty; ///< = 1 if this band doesn't contain any data |
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int mb_size; ///< macroblock size |
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int blk_size; ///< block size |
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int is_halfpel; ///< precision of the motion compensation: 0 - fullpel, 1 - halfpel |
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int inherit_mv; ///< tells if motion vector is inherited from reference macroblock |
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int inherit_qdelta; ///< tells if quantiser delta is inherited from reference macroblock |
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int qdelta_present; ///< tells if Qdelta signal is present in the bitstream (Indeo5 only) |
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int quant_mat; ///< dequant matrix index |
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int glob_quant; ///< quant base for this band |
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const uint8_t *scan; ///< ptr to the scan pattern |
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int scan_size; ///< size of the scantable |
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IVIHuffTab blk_vlc; ///< vlc table for decoding block data |
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int num_corr; ///< number of correction entries |
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uint8_t corr[61*2]; ///< rvmap correction pairs |
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int rvmap_sel; ///< rvmap table selector |
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RVMapDesc *rv_map; ///< ptr to the RLE table for this band |
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int num_tiles; ///< number of tiles in this band |
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IVITile *tiles; ///< array of tile descriptors |
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InvTransformPtr *inv_transform; |
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int transform_size; |
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DCTransformPtr *dc_transform; |
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int is_2d_trans; ///< 1 indicates that the two-dimensional inverse transform is used |
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int32_t checksum; ///< for debug purposes |
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int checksum_present; |
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int bufsize; ///< band buffer size in bytes |
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const uint16_t *intra_base; ///< quantization matrix for intra blocks |
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const uint16_t *inter_base; ///< quantization matrix for inter blocks |
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const uint8_t *intra_scale; ///< quantization coefficient for intra blocks |
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const uint8_t *inter_scale; ///< quantization coefficient for inter blocks |
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} IVIBandDesc; |
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/** |
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* color plane (luma or chroma) information |
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*/ |
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typedef struct IVIPlaneDesc { |
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uint16_t width; |
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uint16_t height; |
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uint8_t num_bands; ///< number of bands this plane subdivided into |
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IVIBandDesc *bands; ///< array of band descriptors |
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} IVIPlaneDesc; |
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typedef struct IVIPicConfig { |
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uint16_t pic_width; |
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uint16_t pic_height; |
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uint16_t chroma_width; |
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uint16_t chroma_height; |
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uint16_t tile_width; |
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uint16_t tile_height; |
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uint8_t luma_bands; |
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uint8_t chroma_bands; |
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} IVIPicConfig; |
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typedef struct IVI45DecContext { |
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GetBitContext gb; |
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RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables |
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uint32_t frame_num; |
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int frame_type; |
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int prev_frame_type; ///< frame type of the previous frame |
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uint32_t data_size; ///< size of the frame data in bytes from picture header |
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int is_scalable; |
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const uint8_t *frame_data; ///< input frame data pointer |
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int inter_scal; ///< signals a sequence of scalable inter frames |
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uint32_t frame_size; ///< frame size in bytes |
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uint32_t pic_hdr_size; ///< picture header size in bytes |
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uint8_t frame_flags; |
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uint16_t checksum; ///< frame checksum |
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IVIPicConfig pic_conf; |
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IVIPlaneDesc planes[3]; ///< color planes |
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int buf_switch; ///< used to switch between three buffers |
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int dst_buf; ///< buffer index for the currently decoded frame |
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int ref_buf; ///< inter frame reference buffer index |
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int ref2_buf; ///< temporal storage for switching buffers |
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int b_ref_buf; ///< second reference frame buffer index |
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IVIHuffTab mb_vlc; ///< current macroblock table descriptor |
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IVIHuffTab blk_vlc; ///< current block table descriptor |
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uint8_t rvmap_sel; |
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uint8_t in_imf; |
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uint8_t in_q; ///< flag for explicitly stored quantiser delta |
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uint8_t pic_glob_quant; |
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uint8_t unknown1; |
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uint16_t gop_hdr_size; |
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uint8_t gop_flags; |
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uint32_t lock_word; |
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int show_indeo4_info; |
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uint8_t has_b_frames; |
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uint8_t has_transp; ///< transparency mode status: 1 - enabled |
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uint8_t uses_tiling; |
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uint8_t uses_haar; |
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uint8_t uses_fullpel; |
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int (*decode_pic_hdr) (struct IVI45DecContext *ctx, AVCodecContext *avctx); |
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int (*decode_band_hdr) (struct IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx); |
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int (*decode_mb_info) (struct IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx); |
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void (*switch_buffers) (struct IVI45DecContext *ctx); |
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int (*is_nonnull_frame)(struct IVI45DecContext *ctx); |
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int gop_invalid; |
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int buf_invalid[4]; |
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int is_indeo4; |
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AVFrame *p_frame; |
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int got_p_frame; |
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} IVI45DecContext; |
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/** compare some properties of two pictures */ |
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static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2) |
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{ |
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✓✗ |
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return str1->pic_width != str2->pic_width || str1->pic_height != str2->pic_height || |
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✓✗✓✗
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str1->chroma_width != str2->chroma_width || str1->chroma_height != str2->chroma_height || |
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✓✗✓✗
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str1->tile_width != str2->tile_width || str1->tile_height != str2->tile_height || |
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✓✓✓✗
✗✓ |
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str1->luma_bands != str2->luma_bands || str1->chroma_bands != str2->chroma_bands; |
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} |
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/** calculate number of tiles in a stride */ |
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#define IVI_NUM_TILES(stride, tile_size) (((stride) + (tile_size) - 1) / (tile_size)) |
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/** calculate number of macroblocks in a tile */ |
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#define IVI_MBs_PER_TILE(tile_width, tile_height, mb_size) \ |
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((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size))) |
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/** convert unsigned values into signed ones (the sign is in the LSB) */ |
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#define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1))) |
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/** scale motion vector */ |
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static inline int ivi_scale_mv(int mv, int mv_scale) |
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{ |
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return (mv + (mv > 0) + (mv_scale - 1)) >> mv_scale; |
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} |
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/** |
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* Initialize static codes used for macroblock and block decoding. |
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*/ |
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void ff_ivi_init_static_vlc(void); |
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/** |
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* Decode a huffman codebook descriptor from the bitstream |
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* and select specified huffman table. |
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* |
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* @param[in,out] gb the GetBit context |
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* @param[in] desc_coded flag signalling if table descriptor was coded |
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* @param[in] which_tab codebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF) |
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* @param[out] huff_tab pointer to the descriptor of the selected table |
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* @param[in] avctx AVCodecContext pointer |
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* @return zero on success, negative value otherwise |
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*/ |
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int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab, |
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IVIHuffTab *huff_tab, AVCodecContext *avctx); |
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/** |
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* Initialize planes (prepares descriptors, allocates buffers etc). |
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* |
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* @param[in,out] planes pointer to the array of the plane descriptors |
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* @param[in] cfg pointer to the ivi_pic_config structure describing picture layout |
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* @param[in] is_indeo4 flag signalling if it is Indeo 4 or not |
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* @return result code: 0 - OK |
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*/ |
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int ff_ivi_init_planes(AVCodecContext *avctx, IVIPlaneDesc *planes, |
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const IVIPicConfig *cfg, int is_indeo4); |
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/** |
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* Initialize tile and macroblock descriptors. |
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* |
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* @param[in,out] planes pointer to the array of the plane descriptors |
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* @param[in] tile_width tile width |
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* @param[in] tile_height tile height |
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* @return result code: 0 - OK |
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*/ |
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int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height); |
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int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
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AVPacket *avpkt); |
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int ff_ivi_decode_close(AVCodecContext *avctx); |
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#endif /* AVCODEC_IVI_H */ |