/* * slice.c * Copyright (C) 1999-2001 Aaron Holtzman * * This file is part of mpeg2dec, a free MPEG-2 video stream decoder. * * mpeg2dec is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * mpeg2dec 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "config.h" #include #include #include "video_out.h" #include "mpeg2_internal.h" #include "attributes.h" extern mc_functions_t mc_functions; extern void (* idct_block_copy) (int16_t * block, uint8_t * dest, int stride); extern void (* idct_block_add) (int16_t * block, uint8_t * dest, int stride); //#ifdef MPEG12_POSTPROC //extern int quant_store[MPEG2_MBR+1][MPEG2_MBC+1]; // [Review] //#endif #include "vlc.h" static int non_linear_quantizer_scale [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 32, 36, 40, 44, 48, 52, 56, 64, 72, 80, 88, 96, 104, 112 }; static inline int get_macroblock_modes (picture_t * picture) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int macroblock_modes; MBtab * tab; switch (picture->picture_coding_type) { case I_TYPE: tab = MB_I + UBITS (bit_buf, 1); DUMPBITS (bit_buf, bits, tab->len); macroblock_modes = tab->modes; if ((! (picture->frame_pred_frame_dct)) && (picture->picture_structure == FRAME_PICTURE)) { macroblock_modes |= UBITS (bit_buf, 1) * DCT_TYPE_INTERLACED; DUMPBITS (bit_buf, bits, 1); } return macroblock_modes; case P_TYPE: tab = MB_P + UBITS (bit_buf, 5); DUMPBITS (bit_buf, bits, tab->len); macroblock_modes = tab->modes; if (picture->picture_structure != FRAME_PICTURE) { if (macroblock_modes & MACROBLOCK_MOTION_FORWARD) { macroblock_modes |= UBITS (bit_buf, 2) * MOTION_TYPE_BASE; DUMPBITS (bit_buf, bits, 2); } return macroblock_modes; } else if (picture->frame_pred_frame_dct) { if (macroblock_modes & MACROBLOCK_MOTION_FORWARD) macroblock_modes |= MC_FRAME; return macroblock_modes; } else { if (macroblock_modes & MACROBLOCK_MOTION_FORWARD) { macroblock_modes |= UBITS (bit_buf, 2) * MOTION_TYPE_BASE; DUMPBITS (bit_buf, bits, 2); } if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN)) { macroblock_modes |= UBITS (bit_buf, 1) * DCT_TYPE_INTERLACED; DUMPBITS (bit_buf, bits, 1); } return macroblock_modes; } case B_TYPE: tab = MB_B + UBITS (bit_buf, 6); DUMPBITS (bit_buf, bits, tab->len); macroblock_modes = tab->modes; if (picture->picture_structure != FRAME_PICTURE) { if (! (macroblock_modes & MACROBLOCK_INTRA)) { macroblock_modes |= UBITS (bit_buf, 2) * MOTION_TYPE_BASE; DUMPBITS (bit_buf, bits, 2); } return macroblock_modes; } else if (picture->frame_pred_frame_dct) { /* if (! (macroblock_modes & MACROBLOCK_INTRA)) */ macroblock_modes |= MC_FRAME; return macroblock_modes; } else { if (macroblock_modes & MACROBLOCK_INTRA) goto intra; macroblock_modes |= UBITS (bit_buf, 2) * MOTION_TYPE_BASE; DUMPBITS (bit_buf, bits, 2); if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN)) { intra: macroblock_modes |= UBITS (bit_buf, 1) * DCT_TYPE_INTERLACED; DUMPBITS (bit_buf, bits, 1); } return macroblock_modes; } case D_TYPE: DUMPBITS (bit_buf, bits, 1); return MACROBLOCK_INTRA; default: return 0; } #undef bit_buf #undef bits #undef bit_ptr } static inline int get_quantizer_scale (picture_t * picture) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int quantizer_scale_code; quantizer_scale_code = UBITS (bit_buf, 5); DUMPBITS (bit_buf, bits, 5); if (picture->q_scale_type) return non_linear_quantizer_scale [quantizer_scale_code]; else return quantizer_scale_code << 1; #undef bit_buf #undef bits #undef bit_ptr } static inline int get_motion_delta (picture_t * picture, int f_code) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int delta; int sign; MVtab * tab; if (bit_buf & 0x80000000) { DUMPBITS (bit_buf, bits, 1); return 0; } else if (bit_buf >= 0x0c000000) { tab = MV_4 + UBITS (bit_buf, 4); delta = (tab->delta << f_code) + 1; bits += tab->len + f_code + 1; bit_buf <<= tab->len; sign = SBITS (bit_buf, 1); bit_buf <<= 1; if (f_code) delta += UBITS (bit_buf, f_code); bit_buf <<= f_code; return (delta ^ sign) - sign; } else { tab = MV_10 + UBITS (bit_buf, 10); delta = (tab->delta << f_code) + 1; bits += tab->len + 1; bit_buf <<= tab->len; sign = SBITS (bit_buf, 1); bit_buf <<= 1; if (f_code) { NEEDBITS (bit_buf, bits, bit_ptr); delta += UBITS (bit_buf, f_code); DUMPBITS (bit_buf, bits, f_code); } return (delta ^ sign) - sign; } #undef bit_buf #undef bits #undef bit_ptr } static inline int bound_motion_vector (int vector, int f_code) { #if 1 int limit; limit = 16 << f_code; if (vector >= limit) return vector - 2*limit; else if (vector < -limit) return vector + 2*limit; else return vector; #else return (vector << (27 - f_code)) >> (27 - f_code); #endif } static inline int get_dmv (picture_t * picture) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) DMVtab * tab; tab = DMV_2 + UBITS (bit_buf, 2); DUMPBITS (bit_buf, bits, tab->len); return tab->dmv; #undef bit_buf #undef bits #undef bit_ptr } static inline int get_coded_block_pattern (picture_t * picture) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) CBPtab * tab; NEEDBITS (bit_buf, bits, bit_ptr); if (bit_buf >= 0x20000000) { tab = CBP_7 - 16 + UBITS (bit_buf, 7); DUMPBITS (bit_buf, bits, tab->len); return tab->cbp; } else { tab = CBP_9 + UBITS (bit_buf, 9); DUMPBITS (bit_buf, bits, tab->len); return tab->cbp; } #undef bit_buf #undef bits #undef bit_ptr } static inline int get_luma_dc_dct_diff (picture_t * picture) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) DCtab * tab; int size; int dc_diff; if (bit_buf < 0xf8000000) { tab = DC_lum_5 + UBITS (bit_buf, 5); size = tab->size; if (size) { bits += tab->len + size; bit_buf <<= tab->len; dc_diff = UBITS (bit_buf, size) - UBITS (SBITS (~bit_buf, 1), size); bit_buf <<= size; return dc_diff; } else { DUMPBITS (bit_buf, bits, 3); return 0; } } else { tab = DC_long - 0x1e0 + UBITS (bit_buf, 9); size = tab->size; DUMPBITS (bit_buf, bits, tab->len); NEEDBITS (bit_buf, bits, bit_ptr); dc_diff = UBITS (bit_buf, size) - UBITS (SBITS (~bit_buf, 1), size); DUMPBITS (bit_buf, bits, size); return dc_diff; } #undef bit_buf #undef bits #undef bit_ptr } static inline int get_chroma_dc_dct_diff (picture_t * picture) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) DCtab * tab; int size; int dc_diff; if (bit_buf < 0xf8000000) { tab = DC_chrom_5 + UBITS (bit_buf, 5); size = tab->size; if (size) { bits += tab->len + size; bit_buf <<= tab->len; dc_diff = UBITS (bit_buf, size) - UBITS (SBITS (~bit_buf, 1), size); bit_buf <<= size; return dc_diff; } else { DUMPBITS (bit_buf, bits, 2); return 0; } } else { tab = DC_long - 0x3e0 + UBITS (bit_buf, 10); size = tab->size; DUMPBITS (bit_buf, bits, tab->len + 1); NEEDBITS (bit_buf, bits, bit_ptr); dc_diff = UBITS (bit_buf, size) - UBITS (SBITS (~bit_buf, 1), size); DUMPBITS (bit_buf, bits, size); return dc_diff; } #undef bit_buf #undef bits #undef bit_ptr } #define SATURATE(val) \ do { \ if ((uint32_t)(val + 2048) > 4095) \ val = (val > 0) ? 2047 : -2048; \ } while (0) static void get_intra_block_B14 (picture_t * picture) { int i; int j; int val; uint8_t * scan = picture->scan; uint8_t * quant_matrix = picture->intra_quantizer_matrix; int quantizer_scale = picture->quantizer_scale; int mismatch; DCTtab * tab; uint32_t bit_buf; int bits; uint8_t * bit_ptr; int16_t * dest; dest = picture->DCTblock; i = 0; mismatch = ~dest[0]; bit_buf = picture->bitstream_buf; bits = picture->bitstream_bits; bit_ptr = picture->bitstream_ptr; NEEDBITS (bit_buf, bits, bit_ptr); while (1) { if (bit_buf >= 0x28000000) { tab = DCT_B14AC_5 - 5 + UBITS (bit_buf, 5); i += tab->run; if (i >= 64) break; /* end of block */ normal_code: j = scan[i]; bit_buf <<= tab->len; bits += tab->len + 1; val = (tab->level * quantizer_scale * quant_matrix[j]) >> 4; /* if (bitstream_get (1)) val = -val; */ val = (val ^ SBITS (bit_buf, 1)) - SBITS (bit_buf, 1); SATURATE (val); dest[j] = val; mismatch ^= val; bit_buf <<= 1; NEEDBITS (bit_buf, bits, bit_ptr); continue; } else if (bit_buf >= 0x04000000) { tab = DCT_B14_8 - 4 + UBITS (bit_buf, 8); i += tab->run; if (i < 64) goto normal_code; /* escape code */ i += UBITS (bit_buf << 6, 6) - 64; if (i >= 64) break; /* illegal, check needed to avoid buffer overflow */ j = scan[i]; DUMPBITS (bit_buf, bits, 12); NEEDBITS (bit_buf, bits, bit_ptr); val = (SBITS (bit_buf, 12) * quantizer_scale * quant_matrix[j]) / 16; SATURATE (val); dest[j] = val; mismatch ^= val; DUMPBITS (bit_buf, bits, 12); NEEDBITS (bit_buf, bits, bit_ptr); continue; } else if (bit_buf >= 0x02000000) { tab = DCT_B14_10 - 8 + UBITS (bit_buf, 10); i += tab->run; if (i < 64) goto normal_code; } else if (bit_buf >= 0x00800000) { tab = DCT_13 - 16 + UBITS (bit_buf, 13); i += tab->run; if (i < 64) goto normal_code; } else if (bit_buf >= 0x00200000) { tab = DCT_15 - 16 + UBITS (bit_buf, 15); i += tab->run; if (i < 64) goto normal_code; } else { tab = DCT_16 + UBITS (bit_buf, 16); bit_buf <<= 16; GETWORD (bit_buf, bits + 16, bit_ptr); i += tab->run; if (i < 64) goto normal_code; } break; /* illegal, check needed to avoid buffer overflow */ } dest[63] ^= mismatch & 1; DUMPBITS (bit_buf, bits, 2); /* dump end of block code */ picture->bitstream_buf = bit_buf; picture->bitstream_bits = bits; picture->bitstream_ptr = bit_ptr; } static void get_intra_block_B15 (picture_t * picture) { int i; int j; int val; uint8_t * scan = picture->scan; uint8_t * quant_matrix = picture->intra_quantizer_matrix; int quantizer_scale = picture->quantizer_scale; int mismatch; DCTtab * tab; uint32_t bit_buf; int bits; uint8_t * bit_ptr; int16_t * dest; dest = picture->DCTblock; i = 0; mismatch = ~dest[0]; bit_buf = picture->bitstream_buf; bits = picture->bitstream_bits; bit_ptr = picture->bitstream_ptr; NEEDBITS (bit_buf, bits, bit_ptr); while (1) { if (bit_buf >= 0x04000000) { tab = DCT_B15_8 - 4 + UBITS (bit_buf, 8); i += tab->run; if (i < 64) { normal_code: j = scan[i]; bit_buf <<= tab->len; bits += tab->len + 1; val = (tab->level * quantizer_scale * quant_matrix[j]) >> 4; /* if (bitstream_get (1)) val = -val; */ val = (val ^ SBITS (bit_buf, 1)) - SBITS (bit_buf, 1); SATURATE (val); dest[j] = val; mismatch ^= val; bit_buf <<= 1; NEEDBITS (bit_buf, bits, bit_ptr); continue; } else { /* end of block. I commented out this code because if we */ /* dont exit here we will still exit at the later test :) */ /* if (i >= 128) break; */ /* end of block */ /* escape code */ i += UBITS (bit_buf << 6, 6) - 64; if (i >= 64) break; /* illegal, check against buffer overflow */ j = scan[i]; DUMPBITS (bit_buf, bits, 12); NEEDBITS (bit_buf, bits, bit_ptr); val = (SBITS (bit_buf, 12) * quantizer_scale * quant_matrix[j]) / 16; SATURATE (val); dest[j] = val; mismatch ^= val; DUMPBITS (bit_buf, bits, 12); NEEDBITS (bit_buf, bits, bit_ptr); continue; } } else if (bit_buf >= 0x02000000) { tab = DCT_B15_10 - 8 + UBITS (bit_buf, 10); i += tab->run; if (i < 64) goto normal_code; } else if (bit_buf >= 0x00800000) { tab = DCT_13 - 16 + UBITS (bit_buf, 13); i += tab->run; if (i < 64) goto normal_code; } else if (bit_buf >= 0x00200000) { tab = DCT_15 - 16 + UBITS (bit_buf, 15); i += tab->run; if (i < 64) goto normal_code; } else { tab = DCT_16 + UBITS (bit_buf, 16); bit_buf <<= 16; GETWORD (bit_buf, bits + 16, bit_ptr); i += tab->run; if (i < 64) goto normal_code; } break; /* illegal, check needed to avoid buffer overflow */ } dest[63] ^= mismatch & 1; DUMPBITS (bit_buf, bits, 4); /* dump end of block code */ picture->bitstream_buf = bit_buf; picture->bitstream_bits = bits; picture->bitstream_ptr = bit_ptr; } static void get_non_intra_block (picture_t * picture) { int i; int j; int val; uint8_t * scan = picture->scan; uint8_t * quant_matrix = picture->non_intra_quantizer_matrix; int quantizer_scale = picture->quantizer_scale; int mismatch; DCTtab * tab; uint32_t bit_buf; int bits; uint8_t * bit_ptr; int16_t * dest; i = -1; mismatch = 1; dest = picture->DCTblock; bit_buf = picture->bitstream_buf; bits = picture->bitstream_bits; bit_ptr = picture->bitstream_ptr; NEEDBITS (bit_buf, bits, bit_ptr); if (bit_buf >= 0x28000000) { tab = DCT_B14DC_5 - 5 + UBITS (bit_buf, 5); goto entry_1; } else goto entry_2; while (1) { if (bit_buf >= 0x28000000) { tab = DCT_B14AC_5 - 5 + UBITS (bit_buf, 5); entry_1: i += tab->run; if (i >= 64) break; /* end of block */ normal_code: j = scan[i]; bit_buf <<= tab->len; bits += tab->len + 1; val = ((2*tab->level+1) * quantizer_scale * quant_matrix[j]) >> 5; /* if (bitstream_get (1)) val = -val; */ val = (val ^ SBITS (bit_buf, 1)) - SBITS (bit_buf, 1); SATURATE (val); dest[j] = val; mismatch ^= val; bit_buf <<= 1; NEEDBITS (bit_buf, bits, bit_ptr); continue; } entry_2: if (bit_buf >= 0x04000000) { tab = DCT_B14_8 - 4 + UBITS (bit_buf, 8); i += tab->run; if (i < 64) goto normal_code; /* escape code */ i += UBITS (bit_buf << 6, 6) - 64; if (i >= 64) break; /* illegal, check needed to avoid buffer overflow */ j = scan[i]; DUMPBITS (bit_buf, bits, 12); NEEDBITS (bit_buf, bits, bit_ptr); val = 2 * (SBITS (bit_buf, 12) + SBITS (bit_buf, 1)) + 1; val = (val * quantizer_scale * quant_matrix[j]) / 32; SATURATE (val); dest[j] = val; mismatch ^= val; DUMPBITS (bit_buf, bits, 12); NEEDBITS (bit_buf, bits, bit_ptr); continue; } else if (bit_buf >= 0x02000000) { tab = DCT_B14_10 - 8 + UBITS (bit_buf, 10); i += tab->run; if (i < 64) goto normal_code; } else if (bit_buf >= 0x00800000) { tab = DCT_13 - 16 + UBITS (bit_buf, 13); i += tab->run; if (i < 64) goto normal_code; } else if (bit_buf >= 0x00200000) { tab = DCT_15 - 16 + UBITS (bit_buf, 15); i += tab->run; if (i < 64) goto normal_code; } else { tab = DCT_16 + UBITS (bit_buf, 16); bit_buf <<= 16; GETWORD (bit_buf, bits + 16, bit_ptr); i += tab->run; if (i < 64) goto normal_code; } break; /* illegal, check needed to avoid buffer overflow */ } dest[63] ^= mismatch & 1; DUMPBITS (bit_buf, bits, 2); /* dump end of block code */ picture->bitstream_buf = bit_buf; picture->bitstream_bits = bits; picture->bitstream_ptr = bit_ptr; } static void get_mpeg1_intra_block (picture_t * picture) { int i; int j; int val; uint8_t * scan = picture->scan; uint8_t * quant_matrix = picture->intra_quantizer_matrix; int quantizer_scale = picture->quantizer_scale; DCTtab * tab; uint32_t bit_buf; int bits; uint8_t * bit_ptr; int16_t * dest; i = 0; dest = picture->DCTblock; bit_buf = picture->bitstream_buf; bits = picture->bitstream_bits; bit_ptr = picture->bitstream_ptr; NEEDBITS (bit_buf, bits, bit_ptr); while (1) { if (bit_buf >= 0x28000000) { tab = DCT_B14AC_5 - 5 + UBITS (bit_buf, 5); i += tab->run; if (i >= 64) break; /* end of block */ normal_code: j = scan[i]; bit_buf <<= tab->len; bits += tab->len + 1; val = (tab->level * quantizer_scale * quant_matrix[j]) >> 4; /* oddification */ val = (val - 1) | 1; /* if (bitstream_get (1)) val = -val; */ val = (val ^ SBITS (bit_buf, 1)) - SBITS (bit_buf, 1); SATURATE (val); dest[j] = val; bit_buf <<= 1; NEEDBITS (bit_buf, bits, bit_ptr); continue; } else if (bit_buf >= 0x04000000) { tab = DCT_B14_8 - 4 + UBITS (bit_buf, 8); i += tab->run; if (i < 64) goto normal_code; /* escape code */ i += UBITS (bit_buf << 6, 6) - 64; if (i >= 64) break; /* illegal, check needed to avoid buffer overflow */ j = scan[i]; DUMPBITS (bit_buf, bits, 12); NEEDBITS (bit_buf, bits, bit_ptr); val = SBITS (bit_buf, 8); if (! (val & 0x7f)) { DUMPBITS (bit_buf, bits, 8); val = UBITS (bit_buf, 8) + 2 * val; } val = (val * quantizer_scale * quant_matrix[j]) / 16; /* oddification */ val = (val + ~SBITS (val, 1)) | 1; SATURATE (val); dest[j] = val; DUMPBITS (bit_buf, bits, 8); NEEDBITS (bit_buf, bits, bit_ptr); continue; } else if (bit_buf >= 0x02000000) { tab = DCT_B14_10 - 8 + UBITS (bit_buf, 10); i += tab->run; if (i < 64) goto normal_code; } else if (bit_buf >= 0x00800000) { tab = DCT_13 - 16 + UBITS (bit_buf, 13); i += tab->run; if (i < 64) goto normal_code; } else if (bit_buf >= 0x00200000) { tab = DCT_15 - 16 + UBITS (bit_buf, 15); i += tab->run; if (i < 64) goto normal_code; } else { tab = DCT_16 + UBITS (bit_buf, 16); bit_buf <<= 16; GETWORD (bit_buf, bits + 16, bit_ptr); i += tab->run; if (i < 64) goto normal_code; } break; /* illegal, check needed to avoid buffer overflow */ } DUMPBITS (bit_buf, bits, 2); /* dump end of block code */ picture->bitstream_buf = bit_buf; picture->bitstream_bits = bits; picture->bitstream_ptr = bit_ptr; } static void get_mpeg1_non_intra_block (picture_t * picture) { int i; int j; int val; uint8_t * scan = picture->scan; uint8_t * quant_matrix = picture->non_intra_quantizer_matrix; int quantizer_scale = picture->quantizer_scale; DCTtab * tab; uint32_t bit_buf; int bits; uint8_t * bit_ptr; int16_t * dest; i = -1; dest = picture->DCTblock; bit_buf = picture->bitstream_buf; bits = picture->bitstream_bits; bit_ptr = picture->bitstream_ptr; NEEDBITS (bit_buf, bits, bit_ptr); if (bit_buf >= 0x28000000) { tab = DCT_B14DC_5 - 5 + UBITS (bit_buf, 5); goto entry_1; } else goto entry_2; while (1) { if (bit_buf >= 0x28000000) { tab = DCT_B14AC_5 - 5 + UBITS (bit_buf, 5); entry_1: i += tab->run; if (i >= 64) break; /* end of block */ normal_code: j = scan[i]; bit_buf <<= tab->len; bits += tab->len + 1; val = ((2*tab->level+1) * quantizer_scale * quant_matrix[j]) >> 5; /* oddification */ val = (val - 1) | 1; /* if (bitstream_get (1)) val = -val; */ val = (val ^ SBITS (bit_buf, 1)) - SBITS (bit_buf, 1); SATURATE (val); dest[j] = val; bit_buf <<= 1; NEEDBITS (bit_buf, bits, bit_ptr); continue; } entry_2: if (bit_buf >= 0x04000000) { tab = DCT_B14_8 - 4 + UBITS (bit_buf, 8); i += tab->run; if (i < 64) goto normal_code; /* escape code */ i += UBITS (bit_buf << 6, 6) - 64; if (i >= 64) break; /* illegal, check needed to avoid buffer overflow */ j = scan[i]; DUMPBITS (bit_buf, bits, 12); NEEDBITS (bit_buf, bits, bit_ptr); val = SBITS (bit_buf, 8); if (! (val & 0x7f)) { DUMPBITS (bit_buf, bits, 8); val = UBITS (bit_buf, 8) + 2 * val; } val = 2 * (val + SBITS (val, 1)) + 1; val = (val * quantizer_scale * quant_matrix[j]) / 32; /* oddification */ val = (val + ~SBITS (val, 1)) | 1; SATURATE (val); dest[j] = val; DUMPBITS (bit_buf, bits, 8); NEEDBITS (bit_buf, bits, bit_ptr); continue; } else if (bit_buf >= 0x02000000) { tab = DCT_B14_10 - 8 + UBITS (bit_buf, 10); i += tab->run; if (i < 64) goto normal_code; } else if (bit_buf >= 0x00800000) { tab = DCT_13 - 16 + UBITS (bit_buf, 13); i += tab->run; if (i < 64) goto normal_code; } else if (bit_buf >= 0x00200000) { tab = DCT_15 - 16 + UBITS (bit_buf, 15); i += tab->run; if (i < 64) goto normal_code; } else { tab = DCT_16 + UBITS (bit_buf, 16); bit_buf <<= 16; GETWORD (bit_buf, bits + 16, bit_ptr); i += tab->run; if (i < 64) goto normal_code; } break; /* illegal, check needed to avoid buffer overflow */ } DUMPBITS (bit_buf, bits, 2); /* dump end of block code */ picture->bitstream_buf = bit_buf; picture->bitstream_bits = bits; picture->bitstream_ptr = bit_ptr; } static inline int get_macroblock_address_increment (picture_t * picture) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) MBAtab * tab; int mba; mba = 0; while (1) { if (bit_buf >= 0x10000000) { tab = MBA_5 - 2 + UBITS (bit_buf, 5); DUMPBITS (bit_buf, bits, tab->len); return mba + tab->mba; } else if (bit_buf >= 0x03000000) { tab = MBA_11 - 24 + UBITS (bit_buf, 11); DUMPBITS (bit_buf, bits, tab->len); return mba + tab->mba; } else switch (UBITS (bit_buf, 11)) { case 8: /* macroblock_escape */ mba += 33; /* no break here on purpose */ case 15: /* macroblock_stuffing (MPEG1 only) */ DUMPBITS (bit_buf, bits, 11); NEEDBITS (bit_buf, bits, bit_ptr); break; default: /* end of slice, or error */ // printf("MB error: %d \n",(UBITS (bit_buf, 11))); // FIXME! // return 0; return -1; } } #undef bit_buf #undef bits #undef bit_ptr } static inline void slice_intra_DCT (picture_t * picture, int cc, uint8_t * dest, int stride) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) NEEDBITS (bit_buf, bits, bit_ptr); /* Get the intra DC coefficient and inverse quantize it */ if (cc == 0) picture->dc_dct_pred[0] += get_luma_dc_dct_diff (picture); else picture->dc_dct_pred[cc] += get_chroma_dc_dct_diff (picture); picture->DCTblock[0] = picture->dc_dct_pred[cc] << (3 - picture->intra_dc_precision); memset (picture->DCTblock + 1, 0, 63 * sizeof (int16_t)); if (picture->mpeg1) { if (picture->picture_coding_type != D_TYPE) get_mpeg1_intra_block (picture); } else if (picture->intra_vlc_format) get_intra_block_B15 (picture); else get_intra_block_B14 (picture); idct_block_copy (picture->DCTblock, dest, stride); #undef bit_buf #undef bits #undef bit_ptr } static inline void slice_non_intra_DCT (picture_t * picture, uint8_t * dest, int stride) { memset (picture->DCTblock, 0, 64 * sizeof (int16_t)); if (picture->mpeg1) get_mpeg1_non_intra_block (picture); else get_non_intra_block (picture); idct_block_add (picture->DCTblock, dest, stride); } #define MOTION_Y(table,offset_x,offset_y,motion_x,motion_y, \ dest,src,offset_dest,offset_src,stride,height) \ do { \ int xy_half; \ int total_offset; \ \ xy_half = ((motion_y & 1) << 1) | (motion_x & 1); \ total_offset = ((offset_y + (motion_y >> 1)) * stride + \ offset_x + (motion_x >> 1) + (offset_src)); \ table[xy_half] (dest[0] + offset_x + (offset_dest), \ src[0] + total_offset, stride, height); \ } while (0) #define MOTION_UV(table,offset_x,offset_y,motion_x,motion_y, \ dest,src,offset_dest,offset_src,stride,height) \ do { \ int xy_half; \ int total_offset; \ \ xy_half = ((motion_y & 1) << 1) | (motion_x & 1); \ total_offset = (((offset_y + motion_y) >> 1) * (stride) + \ ((offset_x + motion_x) >> 1) + (offset_src)); \ table[4+xy_half] (dest[1] + (offset_x >> 1) + (offset_dest), \ src[1] + total_offset, stride, height); \ table[4+xy_half] (dest[2] + (offset_x >> 1) + (offset_dest), \ src[2] + total_offset, stride, height); \ } while (0) static inline void motion_block (void (** table) (uint8_t *, uint8_t *, int32_t, int32_t), int x_offset, int y_offset, int mb_y_8_offset, int src_field, int dest_field, int x_pred, int y_pred, uint8_t * dest[3], uint8_t * src[3], int stride, int height) { MOTION_Y (table, x_offset, y_offset, x_pred, y_pred, dest, src, dest_field + mb_y_8_offset*8*stride, src_field, stride, height); x_pred /= 2; y_pred /= 2; stride >>= 1; height >>= 1; MOTION_UV (table, x_offset, y_offset, x_pred, y_pred, dest, src, (dest_field >> 1) + mb_y_8_offset*4*stride, src_field >> 1, stride, height); } static void motion_mp1 (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int motion_x, motion_y; NEEDBITS (bit_buf, bits, bit_ptr); motion_x = motion->pmv[0][0] + get_motion_delta (picture, motion->f_code[0]); motion_x = bound_motion_vector (motion_x, motion->f_code[0]); motion->pmv[0][0] = motion_x; NEEDBITS (bit_buf, bits, bit_ptr); motion_y = motion->pmv[0][1] + get_motion_delta (picture, motion->f_code[0]); motion_y = bound_motion_vector (motion_y, motion->f_code[0]); motion->pmv[0][1] = motion_y; if (motion->f_code[1]) { motion_x <<= 1; motion_y <<= 1; } motion_block (table, offset, picture->v_offset, 0, 0, 0, motion_x, motion_y, dest, motion->ref[0], stride, 16); #undef bit_buf #undef bits #undef bit_ptr } static void motion_mp1_reuse (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { int motion_x, motion_y; motion_x = motion->pmv[0][0]; motion_y = motion->pmv[0][1]; if (motion->f_code[1]) { motion_x <<= 1; motion_y <<= 1; } motion_block (table, offset, picture->v_offset, 0, 0, 0, motion_x, motion_y, dest, motion->ref[0], stride, 16); } static void motion_fr_frame (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int motion_x, motion_y; NEEDBITS (bit_buf, bits, bit_ptr); motion_x = motion->pmv[0][0] + get_motion_delta (picture, motion->f_code[0]); motion_x = bound_motion_vector (motion_x, motion->f_code[0]); motion->pmv[1][0] = motion->pmv[0][0] = motion_x; NEEDBITS (bit_buf, bits, bit_ptr); motion_y = motion->pmv[0][1] + get_motion_delta (picture, motion->f_code[1]); motion_y = bound_motion_vector (motion_y, motion->f_code[1]); motion->pmv[1][1] = motion->pmv[0][1] = motion_y; motion_block (table, offset, picture->v_offset, 0, 0, 0, motion_x, motion_y, dest, motion->ref[0], stride, 16); #undef bit_buf #undef bits #undef bit_ptr } static void motion_fr_field (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int motion_x, motion_y; int field_select; NEEDBITS (bit_buf, bits, bit_ptr); field_select = SBITS (bit_buf, 1); DUMPBITS (bit_buf, bits, 1); motion_x = motion->pmv[0][0] + get_motion_delta (picture, motion->f_code[0]); motion_x = bound_motion_vector (motion_x, motion->f_code[0]); motion->pmv[0][0] = motion_x; NEEDBITS (bit_buf, bits, bit_ptr); motion_y = (motion->pmv[0][1] >> 1) + get_motion_delta (picture, motion->f_code[1]); /* motion_y = bound_motion_vector (motion_y, motion->f_code[1]); */ motion->pmv[0][1] = motion_y << 1; motion_block (table, offset, picture->v_offset >> 1, 0, (field_select & stride), 0, motion_x, motion_y, dest, motion->ref[0], stride * 2, 8); NEEDBITS (bit_buf, bits, bit_ptr); field_select = SBITS (bit_buf, 1); DUMPBITS (bit_buf, bits, 1); motion_x = motion->pmv[1][0] + get_motion_delta (picture, motion->f_code[0]); motion_x = bound_motion_vector (motion_x, motion->f_code[0]); motion->pmv[1][0] = motion_x; NEEDBITS (bit_buf, bits, bit_ptr); motion_y = (motion->pmv[1][1] >> 1) + get_motion_delta (picture, motion->f_code[1]); /* motion_y = bound_motion_vector (motion_y, motion->f_code[1]); */ motion->pmv[1][1] = motion_y << 1; motion_block (table, offset, picture->v_offset >> 1, 0, (field_select & stride), stride, motion_x, motion_y, dest, motion->ref[0], stride * 2, 8); #undef bit_buf #undef bits #undef bit_ptr } static void motion_fr_dmv (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int motion_x, motion_y; int dmv_x, dmv_y; int m; int other_x, other_y; NEEDBITS (bit_buf, bits, bit_ptr); motion_x = motion->pmv[0][0] + get_motion_delta (picture, motion->f_code[0]); motion_x = bound_motion_vector (motion_x, motion->f_code[0]); motion->pmv[1][0] = motion->pmv[0][0] = motion_x; NEEDBITS (bit_buf, bits, bit_ptr); dmv_x = get_dmv (picture); NEEDBITS (bit_buf, bits, bit_ptr); motion_y = (motion->pmv[0][1] >> 1) + get_motion_delta (picture, motion->f_code[1]); /* motion_y = bound_motion_vector (motion_y, motion->f_code[1]); */ motion->pmv[1][1] = motion->pmv[0][1] = motion_y << 1; NEEDBITS (bit_buf, bits, bit_ptr); dmv_y = get_dmv (picture); motion_block (mc_functions.put, offset, picture->v_offset >> 1, 0, 0, 0, motion_x, motion_y, dest, motion->ref[0], stride * 2, 8); m = picture->top_field_first ? 1 : 3; other_x = ((motion_x * m + (motion_x > 0)) >> 1) + dmv_x; other_y = ((motion_y * m + (motion_y > 0)) >> 1) + dmv_y - 1; motion_block (mc_functions.avg, offset, picture->v_offset >> 1, 0, stride, 0, other_x, other_y, dest, motion->ref[0], stride * 2, 8); motion_block (mc_functions.put, offset, picture->v_offset >> 1, 0, stride, stride, motion_x, motion_y, dest, motion->ref[0], stride * 2, 8); m = picture->top_field_first ? 3 : 1; other_x = ((motion_x * m + (motion_x > 0)) >> 1) + dmv_x; other_y = ((motion_y * m + (motion_y > 0)) >> 1) + dmv_y + 1; motion_block (mc_functions.avg, offset, picture->v_offset >> 1, 0, 0, stride, other_x, other_y, dest, motion->ref[0], stride * 2, 8); #undef bit_buf #undef bits #undef bit_ptr } /* like motion_frame, but reuse previous motion vectors */ static void motion_fr_reuse (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { motion_block (table, offset, picture->v_offset, 0, 0, 0, motion->pmv[0][0], motion->pmv[0][1], dest, motion->ref[0], stride, 16); } /* like motion_frame, but use null motion vectors */ static void motion_fr_zero (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { motion_block (table, offset, picture->v_offset, 0, 0, 0, 0, 0, dest, motion->ref[0], stride, 16); } /* like motion_frame, but parsing without actual motion compensation */ static void motion_fr_conceal (picture_t * picture) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int tmp; NEEDBITS (bit_buf, bits, bit_ptr); tmp = (picture->f_motion.pmv[0][0] + get_motion_delta (picture, picture->f_motion.f_code[0])); tmp = bound_motion_vector (tmp, picture->f_motion.f_code[0]); picture->f_motion.pmv[1][0] = picture->f_motion.pmv[0][0] = tmp; NEEDBITS (bit_buf, bits, bit_ptr); tmp = (picture->f_motion.pmv[0][1] + get_motion_delta (picture, picture->f_motion.f_code[1])); tmp = bound_motion_vector (tmp, picture->f_motion.f_code[1]); picture->f_motion.pmv[1][1] = picture->f_motion.pmv[0][1] = tmp; DUMPBITS (bit_buf, bits, 1); /* remove marker_bit */ #undef bit_buf #undef bits #undef bit_ptr } static void motion_fi_field (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int motion_x, motion_y; int field_select; NEEDBITS (bit_buf, bits, bit_ptr); field_select = UBITS (bit_buf, 1); DUMPBITS (bit_buf, bits, 1); NEEDBITS (bit_buf, bits, bit_ptr); motion_x = motion->pmv[0][0] + get_motion_delta (picture, motion->f_code[0]); motion_x = bound_motion_vector (motion_x, motion->f_code[0]); motion->pmv[1][0] = motion->pmv[0][0] = motion_x; NEEDBITS (bit_buf, bits, bit_ptr); motion_y = motion->pmv[0][1] + get_motion_delta (picture, motion->f_code[1]); motion_y = bound_motion_vector (motion_y, motion->f_code[1]); motion->pmv[1][1] = motion->pmv[0][1] = motion_y; motion_block (table, offset, picture->v_offset, 0, 0, 0, motion_x, motion_y, dest, motion->ref[field_select], stride, 16); #undef bit_buf #undef bits #undef bit_ptr } static void motion_fi_16x8 (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int motion_x, motion_y; int field_select; NEEDBITS (bit_buf, bits, bit_ptr); field_select = UBITS (bit_buf, 1); DUMPBITS (bit_buf, bits, 1); NEEDBITS (bit_buf, bits, bit_ptr); motion_x = motion->pmv[0][0] + get_motion_delta (picture, motion->f_code[0]); motion_x = bound_motion_vector (motion_x, motion->f_code[0]); motion->pmv[0][0] = motion_x; NEEDBITS (bit_buf, bits, bit_ptr); motion_y = motion->pmv[0][1] + get_motion_delta (picture, motion->f_code[1]); motion_y = bound_motion_vector (motion_y, motion->f_code[1]); motion->pmv[0][1] = motion_y; motion_block (table, offset, picture->v_offset, 0, 0, 0, motion_x, motion_y, dest, motion->ref[field_select], stride, 8); NEEDBITS (bit_buf, bits, bit_ptr); field_select = UBITS (bit_buf, 1); DUMPBITS (bit_buf, bits, 1); NEEDBITS (bit_buf, bits, bit_ptr); motion_x = motion->pmv[1][0] + get_motion_delta (picture, motion->f_code[0]); motion_x = bound_motion_vector (motion_x, motion->f_code[0]); motion->pmv[1][0] = motion_x; NEEDBITS (bit_buf, bits, bit_ptr); motion_y = motion->pmv[1][1] + get_motion_delta (picture, motion->f_code[1]); motion_y = bound_motion_vector (motion_y, motion->f_code[1]); motion->pmv[1][1] = motion_y; motion_block (table, offset, picture->v_offset+8, 1, 0, 0, motion_x, motion_y, dest, motion->ref[field_select], stride, 8); #undef bit_buf #undef bits #undef bit_ptr } static void motion_fi_dmv (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int motion_x, motion_y; int dmv_x, dmv_y; NEEDBITS (bit_buf, bits, bit_ptr); motion_x = motion->pmv[0][0] + get_motion_delta (picture, motion->f_code[0]); motion_x = bound_motion_vector (motion_x, motion->f_code[0]); motion->pmv[1][0] = motion->pmv[0][0] = motion_x; NEEDBITS (bit_buf, bits, bit_ptr); dmv_x = get_dmv (picture); NEEDBITS (bit_buf, bits, bit_ptr); motion_y = motion->pmv[0][1] + get_motion_delta (picture, motion->f_code[1]); motion_y = bound_motion_vector (motion_y, motion->f_code[1]); motion->pmv[1][1] = motion->pmv[0][1] = motion_y; NEEDBITS (bit_buf, bits, bit_ptr); dmv_y = get_dmv (picture); motion_block (mc_functions.put, offset, picture->v_offset, 0, 0, 0, motion_x, motion_y, dest, motion->ref[picture->current_field], stride, 16); motion_x = ((motion_x + (motion_x > 0)) >> 1) + dmv_x; motion_y = ((motion_y + (motion_y > 0)) >> 1) + dmv_y + 2 * picture->current_field - 1; motion_block (mc_functions.avg, offset, picture->v_offset, 0, 0, 0, motion_x, motion_y, dest, motion->ref[!picture->current_field], stride, 16); #undef bit_buf #undef bits #undef bit_ptr } static void motion_fi_reuse (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { motion_block (table, offset, picture->v_offset, 0, 0, 0, motion->pmv[0][0], motion->pmv[0][1], dest, motion->ref[picture->current_field], stride, 16); } static void motion_fi_zero (picture_t * picture, motion_t * motion, uint8_t * dest[3], int offset, int stride, void (** table) (uint8_t *, uint8_t *, int, int)) { motion_block (table, offset, picture->v_offset, 0, 0, 0, 0, 0, dest, motion->ref[picture->current_field], stride, 16); } static void motion_fi_conceal (picture_t * picture) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int tmp; NEEDBITS (bit_buf, bits, bit_ptr); DUMPBITS (bit_buf, bits, 1); /* remove field_select */ NEEDBITS (bit_buf, bits, bit_ptr); tmp = (picture->f_motion.pmv[0][0] + get_motion_delta (picture, picture->f_motion.f_code[0])); tmp = bound_motion_vector (tmp, picture->f_motion.f_code[0]); picture->f_motion.pmv[1][0] = picture->f_motion.pmv[0][0] = tmp; NEEDBITS (bit_buf, bits, bit_ptr); tmp = (picture->f_motion.pmv[0][1] + get_motion_delta (picture, picture->f_motion.f_code[1])); tmp = bound_motion_vector (tmp, picture->f_motion.f_code[1]); picture->f_motion.pmv[1][1] = picture->f_motion.pmv[0][1] = tmp; DUMPBITS (bit_buf, bits, 1); /* remove marker_bit */ #undef bit_buf #undef bits #undef bit_ptr } #define MOTION(routine,direction) \ do { \ if ((direction) & MACROBLOCK_MOTION_FORWARD) \ routine (picture, &(picture->f_motion), dest, offset, stride, \ mc_functions.put); \ if ((direction) & MACROBLOCK_MOTION_BACKWARD) \ routine (picture, &(picture->b_motion), dest, offset, stride, \ ((direction) & MACROBLOCK_MOTION_FORWARD ? \ mc_functions.avg : mc_functions.put)); \ } while (0) #define CHECK_DISPLAY \ do { \ if (offset == picture->coded_picture_width) { \ do { /* just so we can use the break statement */ \ if (picture->current_frame->copy) { \ picture->current_frame->copy (picture->current_frame, \ dest); \ if (picture->picture_coding_type == B_TYPE) \ break; \ } \ dest[0] += 16 * stride; \ dest[1] += 4 * stride; \ dest[2] += 4 * stride; \ } while (0); \ if (! (picture->mpeg1)) \ return 0; \ picture->v_offset += 16; \ if (picture->v_offset >= picture->coded_picture_height) \ return 0; \ offset = 0; ++code; \ } \ } while (0) int slice_process (picture_t * picture, uint8_t code, uint8_t * buffer) { #define bit_buf (picture->bitstream_buf) #define bits (picture->bitstream_bits) #define bit_ptr (picture->bitstream_ptr) int macroblock_modes; int stride; uint8_t * dest[3]; int offset; uint8_t ** forward_ref[2]; stride = picture->coded_picture_width; offset = (code - 1) * stride * 4; picture->v_offset = (code - 1) * 16; forward_ref[0] = picture->forward_reference_frame->base; if (picture->picture_structure != FRAME_PICTURE) { forward_ref[1] = picture->forward_reference_frame->base; offset <<= 1; picture->current_field = (picture->picture_structure == BOTTOM_FIELD); if ((picture->second_field) && (picture->picture_coding_type != B_TYPE)) forward_ref[picture->picture_structure == TOP_FIELD] = picture->current_frame->base; picture->f_motion.ref[1][0] = forward_ref[1][0] + stride; picture->f_motion.ref[1][1] = forward_ref[1][1] + (stride >> 1); picture->f_motion.ref[1][2] = forward_ref[1][2] + (stride >> 1); picture->b_motion.ref[1][0] = picture->backward_reference_frame->base[0] + stride; picture->b_motion.ref[1][1] = picture->backward_reference_frame->base[1] + (stride >> 1); picture->b_motion.ref[1][2] = picture->backward_reference_frame->base[2] + (stride >> 1); } picture->f_motion.ref[0][0] = forward_ref[0][0]; picture->f_motion.ref[0][1] = forward_ref[0][1]; picture->f_motion.ref[0][2] = forward_ref[0][2]; picture->f_motion.pmv[0][0] = picture->f_motion.pmv[0][1] = 0; picture->f_motion.pmv[1][0] = picture->f_motion.pmv[1][1] = 0; picture->b_motion.ref[0][0] = picture->backward_reference_frame->base[0]; picture->b_motion.ref[0][1] = picture->backward_reference_frame->base[1]; picture->b_motion.ref[0][2] = picture->backward_reference_frame->base[2]; picture->b_motion.pmv[0][0] = picture->b_motion.pmv[0][1] = 0; picture->b_motion.pmv[1][0] = picture->b_motion.pmv[1][1] = 0; if ((picture->current_frame->copy) && (picture->picture_coding_type == B_TYPE)) offset = 0; dest[0] = picture->current_frame->base[0] + offset * 4; dest[1] = picture->current_frame->base[1] + offset; dest[2] = picture->current_frame->base[2] + offset; switch (picture->picture_structure) { case BOTTOM_FIELD: dest[0] += stride; dest[1] += stride >> 1; dest[2] += stride >> 1; /* follow thru */ case TOP_FIELD: stride <<= 1; } picture->dc_dct_pred[0] = picture->dc_dct_pred[1] = picture->dc_dct_pred[2] = 1 << (picture->intra_dc_precision + 7); bitstream_init (picture, buffer); picture->quantizer_scale = get_quantizer_scale (picture); /* ignore intra_slice and all the extra data */ while (bit_buf & 0x80000000) { DUMPBITS (bit_buf, bits, 9); NEEDBITS (bit_buf, bits, bit_ptr); } DUMPBITS (bit_buf, bits, 1); NEEDBITS (bit_buf, bits, bit_ptr); offset = get_macroblock_address_increment (picture) << 4; while (1) { NEEDBITS (bit_buf, bits, bit_ptr); macroblock_modes = get_macroblock_modes (picture); /* maybe integrate MACROBLOCK_QUANT test into get_macroblock_modes ? */ if (macroblock_modes & MACROBLOCK_QUANT) picture->quantizer_scale = get_quantizer_scale (picture); if (macroblock_modes & MACROBLOCK_INTRA) { int DCT_offset, DCT_stride; if (picture->concealment_motion_vectors) { if (picture->picture_structure == FRAME_PICTURE) motion_fr_conceal (picture); else motion_fi_conceal (picture); } else { picture->f_motion.pmv[0][0] = picture->f_motion.pmv[0][1] = 0; picture->f_motion.pmv[1][0] = picture->f_motion.pmv[1][1] = 0; picture->b_motion.pmv[0][0] = picture->b_motion.pmv[0][1] = 0; picture->b_motion.pmv[1][0] = picture->b_motion.pmv[1][1] = 0; } if (macroblock_modes & DCT_TYPE_INTERLACED) { DCT_offset = stride; DCT_stride = stride * 2; } else { DCT_offset = stride * 8; DCT_stride = stride; } slice_intra_DCT (picture, 0, dest[0] + offset, DCT_stride); slice_intra_DCT (picture, 0, dest[0] + offset + 8, DCT_stride); slice_intra_DCT (picture, 0, dest[0] + offset + DCT_offset, DCT_stride); slice_intra_DCT (picture, 0, dest[0] + offset + DCT_offset + 8, DCT_stride); slice_intra_DCT (picture, 1, dest[1] + (offset >> 1), stride >> 1); slice_intra_DCT (picture, 2, dest[2] + (offset >> 1), stride >> 1); if (picture->picture_coding_type == D_TYPE) { NEEDBITS (bit_buf, bits, bit_ptr); DUMPBITS (bit_buf, bits, 1); } } else { if (picture->mpeg1) { if ((macroblock_modes & MOTION_TYPE_MASK) == MC_FRAME) MOTION (motion_mp1, macroblock_modes); else { /* non-intra mb without forward mv in a P picture */ picture->f_motion.pmv[0][0] = 0; picture->f_motion.pmv[0][1] = 0; picture->f_motion.pmv[1][0] = 0; picture->f_motion.pmv[1][1] = 0; MOTION (motion_fr_zero, MACROBLOCK_MOTION_FORWARD); } } else if (picture->picture_structure == FRAME_PICTURE) switch (macroblock_modes & MOTION_TYPE_MASK) { case MC_FRAME: MOTION (motion_fr_frame, macroblock_modes); break; case MC_FIELD: MOTION (motion_fr_field, macroblock_modes); break; case MC_DMV: MOTION (motion_fr_dmv, MACROBLOCK_MOTION_FORWARD); break; case 0: /* non-intra mb without forward mv in a P picture */ picture->f_motion.pmv[0][0] = 0; picture->f_motion.pmv[0][1] = 0; picture->f_motion.pmv[1][0] = 0; picture->f_motion.pmv[1][1] = 0; MOTION (motion_fr_zero, MACROBLOCK_MOTION_FORWARD); break; } else switch (macroblock_modes & MOTION_TYPE_MASK) { case MC_FIELD: MOTION (motion_fi_field, macroblock_modes); break; case MC_16X8: MOTION (motion_fi_16x8, macroblock_modes); break; case MC_DMV: MOTION (motion_fi_dmv, MACROBLOCK_MOTION_FORWARD); break; case 0: /* non-intra mb without forward mv in a P picture */ picture->f_motion.pmv[0][0] = 0; picture->f_motion.pmv[0][1] = 0; picture->f_motion.pmv[1][0] = 0; picture->f_motion.pmv[1][1] = 0; MOTION (motion_fi_zero, MACROBLOCK_MOTION_FORWARD); break; } if (macroblock_modes & MACROBLOCK_PATTERN) { int coded_block_pattern; int DCT_offset, DCT_stride; if (macroblock_modes & DCT_TYPE_INTERLACED) { DCT_offset = stride; DCT_stride = stride * 2; } else { DCT_offset = stride * 8; DCT_stride = stride; } coded_block_pattern = get_coded_block_pattern (picture); if (coded_block_pattern & 0x20) slice_non_intra_DCT (picture, dest[0] + offset, DCT_stride); if (coded_block_pattern & 0x10) slice_non_intra_DCT (picture, dest[0] + offset + 8, DCT_stride); if (coded_block_pattern & 0x08) slice_non_intra_DCT (picture, dest[0] + offset + DCT_offset, DCT_stride); if (coded_block_pattern & 0x04) slice_non_intra_DCT (picture, dest[0] + offset + DCT_offset + 8, DCT_stride); if (coded_block_pattern & 0x2) slice_non_intra_DCT (picture, dest[1] + (offset >> 1), stride >> 1); if (coded_block_pattern & 0x1) slice_non_intra_DCT (picture, dest[2] + (offset >> 1), stride >> 1); } picture->dc_dct_pred[0] = picture->dc_dct_pred[1] = picture->dc_dct_pred[2] = 1 << (picture->intra_dc_precision+7); } #ifdef MPEG12_POSTPROC picture->current_frame->quant_store[code][(offset>>4)+1] = picture->quantizer_scale; #endif offset += 16; CHECK_DISPLAY; NEEDBITS (bit_buf, bits, bit_ptr); if (0 /* FIXME */ && (bit_buf & 0x80000000)) { DUMPBITS (bit_buf, bits, 1); } else { int mba_inc; mba_inc = get_macroblock_address_increment (picture); if (!mba_inc) continue; else if (mba_inc < 0) break; picture->dc_dct_pred[0] = picture->dc_dct_pred[1] = picture->dc_dct_pred[2] = 1 << (picture->intra_dc_precision+7); if (picture->picture_coding_type == P_TYPE) { picture->f_motion.pmv[0][0] = picture->f_motion.pmv[0][1] = 0; picture->f_motion.pmv[1][0] = picture->f_motion.pmv[1][1] = 0; do { if (picture->picture_structure == FRAME_PICTURE) MOTION (motion_fr_zero, MACROBLOCK_MOTION_FORWARD); else MOTION (motion_fi_zero, MACROBLOCK_MOTION_FORWARD); #ifdef MPEG12_POSTPROC picture->current_frame->quant_store[code][(offset>>4)+1] = picture->quantizer_scale; #endif offset += 16; CHECK_DISPLAY; } while (--mba_inc); } else { do { if (picture->mpeg1) MOTION (motion_mp1_reuse, macroblock_modes); else if (picture->picture_structure == FRAME_PICTURE) MOTION (motion_fr_reuse, macroblock_modes); else MOTION (motion_fi_reuse, macroblock_modes); #ifdef MPEG12_POSTPROC picture->current_frame->quant_store[code][(offset>>4)+1] = picture->quantizer_scale; #endif offset += 16; CHECK_DISPLAY; } while (--mba_inc); } } } return 0; #undef bit_buf #undef bits #undef bit_ptr }