diff options
Diffstat (limited to 'libmpeg2/slice.c')
| -rw-r--r-- | libmpeg2/slice.c | 2101 |
1 files changed, 0 insertions, 2101 deletions
diff --git a/libmpeg2/slice.c b/libmpeg2/slice.c deleted file mode 100644 index 60a6119987..0000000000 --- a/libmpeg2/slice.c +++ /dev/null @@ -1,2101 +0,0 @@ -/* - * slice.c - * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org> - * Copyright (C) 2003 Peter Gubanov <peter@elecard.net.ru> - * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> - * - * This file is part of mpeg2dec, a free MPEG-2 video stream decoder. - * See http://libmpeg2.sourceforge.net/ for updates. - * - * 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 - * - * Modified for use with MPlayer, see libmpeg2_changes.diff for the exact changes. - * detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/ - * $Id$ - */ - -#include "config.h" - -#include <inttypes.h> - -#include "mpeg2.h" -#include "attributes.h" -#include "mpeg2_internal.h" - -extern mpeg2_mc_t mpeg2_mc; -extern void (* mpeg2_idct_copy) (int16_t * block, uint8_t * dest, int stride); -extern void (* mpeg2_idct_add) (int last, int16_t * block, - uint8_t * dest, int stride); -extern void (* mpeg2_cpu_state_save) (cpu_state_t * state); -extern void (* mpeg2_cpu_state_restore) (cpu_state_t * state); - -#include "vlc.h" - -static inline int get_macroblock_modes (mpeg2_decoder_t * const decoder) -{ -#define bit_buf (decoder->bitstream_buf) -#define bits (decoder->bitstream_bits) -#define bit_ptr (decoder->bitstream_ptr) - int macroblock_modes; - const MBtab * tab; - - switch (decoder->coding_type) { - case I_TYPE: - - tab = MB_I + UBITS (bit_buf, 1); - DUMPBITS (bit_buf, bits, tab->len); - macroblock_modes = tab->modes; - - if ((! (decoder->frame_pred_frame_dct)) && - (decoder->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 (decoder->picture_structure != FRAME_PICTURE) { - if (macroblock_modes & MACROBLOCK_MOTION_FORWARD) { - macroblock_modes |= UBITS (bit_buf, 2) << MOTION_TYPE_SHIFT; - DUMPBITS (bit_buf, bits, 2); - } - return macroblock_modes | MACROBLOCK_MOTION_FORWARD; - } else if (decoder->frame_pred_frame_dct) { - if (macroblock_modes & MACROBLOCK_MOTION_FORWARD) - macroblock_modes |= MC_FRAME << MOTION_TYPE_SHIFT; - return macroblock_modes | MACROBLOCK_MOTION_FORWARD; - } else { - if (macroblock_modes & MACROBLOCK_MOTION_FORWARD) { - macroblock_modes |= UBITS (bit_buf, 2) << MOTION_TYPE_SHIFT; - 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 | MACROBLOCK_MOTION_FORWARD; - } - - case B_TYPE: - - tab = MB_B + UBITS (bit_buf, 6); - DUMPBITS (bit_buf, bits, tab->len); - macroblock_modes = tab->modes; - - if (decoder->picture_structure != FRAME_PICTURE) { - if (! (macroblock_modes & MACROBLOCK_INTRA)) { - macroblock_modes |= UBITS (bit_buf, 2) << MOTION_TYPE_SHIFT; - DUMPBITS (bit_buf, bits, 2); - } - return macroblock_modes; - } else if (decoder->frame_pred_frame_dct) { - /* if (! (macroblock_modes & MACROBLOCK_INTRA)) */ - macroblock_modes |= MC_FRAME << MOTION_TYPE_SHIFT; - return macroblock_modes; - } else { - if (macroblock_modes & MACROBLOCK_INTRA) - goto intra; - macroblock_modes |= UBITS (bit_buf, 2) << MOTION_TYPE_SHIFT; - 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 void get_quantizer_scale (mpeg2_decoder_t * const decoder) -{ -#define bit_buf (decoder->bitstream_buf) -#define bits (decoder->bitstream_bits) -#define bit_ptr (decoder->bitstream_ptr) - - int quantizer_scale_code; - - quantizer_scale_code = UBITS (bit_buf, 5); - DUMPBITS (bit_buf, bits, 5); - decoder->quantizer_scale = decoder->quantizer_scales[quantizer_scale_code]; - - decoder->quantizer_matrix[0] = - decoder->quantizer_prescale[0][quantizer_scale_code]; - decoder->quantizer_matrix[1] = - decoder->quantizer_prescale[1][quantizer_scale_code]; - decoder->quantizer_matrix[2] = - decoder->chroma_quantizer[0][quantizer_scale_code]; - decoder->quantizer_matrix[3] = - decoder->chroma_quantizer[1][quantizer_scale_code]; -#undef bit_buf -#undef bits -#undef bit_ptr -} - -static inline int get_motion_delta (mpeg2_decoder_t * const decoder, - const int f_code) -{ -#define bit_buf (decoder->bitstream_buf) -#define bits (decoder->bitstream_bits) -#define bit_ptr (decoder->bitstream_ptr) - - int delta; - int sign; - const 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 (const int vector, const int f_code) -{ - return ((int32_t)vector << (27 - f_code)) >> (27 - f_code); -} - -static inline int get_dmv (mpeg2_decoder_t * const decoder) -{ -#define bit_buf (decoder->bitstream_buf) -#define bits (decoder->bitstream_bits) -#define bit_ptr (decoder->bitstream_ptr) - - const 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 (mpeg2_decoder_t * const decoder) -{ -#define bit_buf (decoder->bitstream_buf) -#define bits (decoder->bitstream_bits) -#define bit_ptr (decoder->bitstream_ptr) - - const CBPtab * tab; - - NEEDBITS (bit_buf, bits, bit_ptr); - - if (bit_buf >= 0x20000000) { - - tab = CBP_7 + (UBITS (bit_buf, 7) - 16); - 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 (mpeg2_decoder_t * const decoder) -{ -#define bit_buf (decoder->bitstream_buf) -#define bits (decoder->bitstream_bits) -#define bit_ptr (decoder->bitstream_ptr) - const 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 << decoder->intra_dc_precision; - } else { - DUMPBITS (bit_buf, bits, 3); - return 0; - } - } else { - tab = DC_long + (UBITS (bit_buf, 9) - 0x1e0); - 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 << decoder->intra_dc_precision; - } -#undef bit_buf -#undef bits -#undef bit_ptr -} - -static inline int get_chroma_dc_dct_diff (mpeg2_decoder_t * const decoder) -{ -#define bit_buf (decoder->bitstream_buf) -#define bits (decoder->bitstream_bits) -#define bit_ptr (decoder->bitstream_ptr) - const 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 << decoder->intra_dc_precision; - } else { - DUMPBITS (bit_buf, bits, 2); - return 0; - } - } else { - tab = DC_long + (UBITS (bit_buf, 10) - 0x3e0); - 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 << decoder->intra_dc_precision; - } -#undef bit_buf -#undef bits -#undef bit_ptr -} - -#define SATURATE(val) \ -do { \ - val <<= 4; \ - if (unlikely (val != (int16_t) val)) \ - val = (SBITS (val, 1) ^ 2047) << 4; \ -} while (0) - -static void get_intra_block_B14 (mpeg2_decoder_t * const decoder, - const uint16_t * const quant_matrix) -{ - int i; - int j; - int val; - const uint8_t * const scan = decoder->scan; - int mismatch; - const DCTtab * tab; - uint32_t bit_buf; - int bits; - const uint8_t * bit_ptr; - int16_t * const dest = decoder->DCTblock; - - i = 0; - mismatch = ~dest[0]; - - bit_buf = decoder->bitstream_buf; - bits = decoder->bitstream_bits; - bit_ptr = decoder->bitstream_ptr; - - NEEDBITS (bit_buf, bits, bit_ptr); - - while (1) { - if (bit_buf >= 0x28000000) { - - tab = DCT_B14AC_5 + (UBITS (bit_buf, 5) - 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 * 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 + (UBITS (bit_buf, 8) - 4); - - 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) * 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 + (UBITS (bit_buf, 10) - 8); - i += tab->run; - if (i < 64) - goto normal_code; - } else if (bit_buf >= 0x00800000) { - tab = DCT_13 + (UBITS (bit_buf, 13) - 16); - i += tab->run; - if (i < 64) - goto normal_code; - } else if (bit_buf >= 0x00200000) { - tab = DCT_15 + (UBITS (bit_buf, 15) - 16); - 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 & 16; - DUMPBITS (bit_buf, bits, tab->len); /* dump end of block code */ - decoder->bitstream_buf = bit_buf; - decoder->bitstream_bits = bits; - decoder->bitstream_ptr = bit_ptr; -} - -static void get_intra_block_B15 (mpeg2_decoder_t * const decoder, - const uint16_t * const quant_matrix) -{ - int i; - int j; - int val; - const uint8_t * const scan = decoder->scan; - int mismatch; - const DCTtab * tab; - uint32_t bit_buf; - int bits; - const uint8_t * bit_ptr; - int16_t * const dest = decoder->DCTblock; - - i = 0; - mismatch = ~dest[0]; - - bit_buf = decoder->bitstream_buf; - bits = decoder->bitstream_bits; - bit_ptr = decoder->bitstream_ptr; - - NEEDBITS (bit_buf, bits, bit_ptr); - - while (1) { - if (bit_buf >= 0x04000000) { - - tab = DCT_B15_8 + (UBITS (bit_buf, 8) - 4); - - i += tab->run; - if (i < 64) { - - normal_code: - j = scan[i]; - bit_buf <<= tab->len; - bits += tab->len + 1; - val = (tab->level * 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 */ - /* do not 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) * 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 + (UBITS (bit_buf, 10) - 8); - i += tab->run; - if (i < 64) - goto normal_code; - } else if (bit_buf >= 0x00800000) { - tab = DCT_13 + (UBITS (bit_buf, 13) - 16); - i += tab->run; - if (i < 64) - goto normal_code; - } else if (bit_buf >= 0x00200000) { - tab = DCT_15 + (UBITS (bit_buf, 15) - 16); - 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 & 16; - DUMPBITS (bit_buf, bits, tab->len); /* dump end of block code */ - decoder->bitstream_buf = bit_buf; - decoder->bitstream_bits = bits; - decoder->bitstream_ptr = bit_ptr; -} - -static int get_non_intra_block (mpeg2_decoder_t * const decoder, - const uint16_t * const quant_matrix) -{ - int i; - int j; - int val; - const uint8_t * const scan = decoder->scan; - int mismatch; - const DCTtab * tab; - uint32_t bit_buf; - int bits; - const uint8_t * bit_ptr; - int16_t * const dest = decoder->DCTblock; - - i = -1; - mismatch = -1; - - bit_buf = decoder->bitstream_buf; - bits = decoder->bitstream_bits; - bit_ptr = decoder->bitstream_ptr; - - NEEDBITS (bit_buf, bits, bit_ptr); - if (bit_buf >= 0x28000000) { - tab = DCT_B14DC_5 + (UBITS (bit_buf, 5) - 5); - goto entry_1; - } else - goto entry_2; - - while (1) { - if (bit_buf >= 0x28000000) { - - tab = DCT_B14AC_5 + (UBITS (bit_buf, 5) - 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) * 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 + (UBITS (bit_buf, 8) - 4); - - 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 * 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 + (UBITS (bit_buf, 10) - 8); - i += tab->run; - if (i < 64) - goto normal_code; - } else if (bit_buf >= 0x00800000) { - tab = DCT_13 + (UBITS (bit_buf, 13) - 16); - i += tab->run; - if (i < 64) - goto normal_code; - } else if (bit_buf >= 0x00200000) { - tab = DCT_15 + (UBITS (bit_buf, 15) - 16); - 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 & 16; - DUMPBITS (bit_buf, bits, tab->len); /* dump end of block code */ - decoder->bitstream_buf = bit_buf; - decoder->bitstream_bits = bits; - decoder->bitstream_ptr = bit_ptr; - return i; -} - -static void get_mpeg1_intra_block (mpeg2_decoder_t * const decoder) -{ - int i; - int j; - int val; - const uint8_t * const scan = decoder->scan; - const uint16_t * const quant_matrix = decoder->quantizer_matrix[0]; - const DCTtab * tab; - uint32_t bit_buf; - int bits; - const uint8_t * bit_ptr; - int16_t * const dest = decoder->DCTblock; - - i = 0; - - bit_buf = decoder->bitstream_buf; - bits = decoder->bitstream_bits; - bit_ptr = decoder->bitstream_ptr; - - NEEDBITS (bit_buf, bits, bit_ptr); - - while (1) { - if (bit_buf >= 0x28000000) { - - tab = DCT_B14AC_5 + (UBITS (bit_buf, 5) - 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 * 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 + (UBITS (bit_buf, 8) - 4); - - 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 * 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 + (UBITS (bit_buf, 10) - 8); - i += tab->run; - if (i < 64) - goto normal_code; - } else if (bit_buf >= 0x00800000) { - tab = DCT_13 + (UBITS (bit_buf, 13) - 16); - i += tab->run; - if (i < 64) - goto normal_code; - } else if (bit_buf >= 0x00200000) { - tab = DCT_15 + (UBITS (bit_buf, 15) - 16); - 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, tab->len); /* dump end of block code */ - decoder->bitstream_buf = bit_buf; - decoder->bitstream_bits = bits; - decoder->bitstream_ptr = bit_ptr; -} - -static int get_mpeg1_non_intra_block (mpeg2_decoder_t * const decoder) -{ - int i; - int j; - int val; - const uint8_t * const scan = decoder->scan; - const uint16_t * const quant_matrix = decoder->quantizer_matrix[1]; - const DCTtab * tab; - uint32_t bit_buf; - int bits; - const uint8_t * bit_ptr; - int16_t * const dest = decoder->DCTblock; - - i = -1; - - bit_buf = decoder->bitstream_buf; - bits = decoder->bitstream_bits; - bit_ptr = decoder->bitstream_ptr; - - NEEDBITS (bit_buf, bits, bit_ptr); - if (bit_buf >= 0x28000000) { - tab = DCT_B14DC_5 + (UBITS (bit_buf, 5) - 5); - goto entry_1; - } else - goto entry_2; - - while (1) { - if (bit_buf >= 0x28000000) { - - tab = DCT_B14AC_5 + (UBITS (bit_buf, 5) - 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) * 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 + (UBITS (bit_buf, 8) - 4); - - 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 * 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 + (UBITS (bit_buf, 10) - 8); - i += tab->run; - if (i < 64) - goto normal_code; - } else if (bit_buf >= 0x00800000) { - tab = DCT_13 + (UBITS (bit_buf, 13) - 16); - i += tab->run; - if (i < 64) - goto normal_code; - } else if (bit_buf >= 0x00200000) { - tab = DCT_15 + (UBITS (bit_buf, 15) - 16); - 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, tab->len); /* dump end of block code */ - decoder->bitstream_buf = bit_buf; - decoder->bitstream_bits = bits; - decoder->bitstream_ptr = bit_ptr; - return i; -} - -static inline void slice_intra_DCT (mpeg2_decoder_t * const decoder, - const int cc, - uint8_t * const dest, const int stride) -{ -#define bit_buf (decoder->bitstream_buf) -#define bits (decoder->bitstream_bits) -#define bit_ptr (decoder->bitstream_ptr) - NEEDBITS (bit_buf, bits, bit_ptr); - /* Get the intra DC coefficient and inverse quantize it */ - if (cc == 0) - decoder->DCTblock[0] = - decoder->dc_dct_pred[0] += get_luma_dc_dct_diff (decoder); - else - decoder->DCTblock[0] = - decoder->dc_dct_pred[cc] += get_chroma_dc_dct_diff (decoder); - - if (decoder->mpeg1) { - if (decoder->coding_type != D_TYPE) - get_mpeg1_intra_block (decoder); - } else if (decoder->intra_vlc_format) - get_intra_block_B15 (decoder, decoder->quantizer_matrix[cc ? 2 : 0]); - else - get_intra_block_B14 (decoder, decoder->quantizer_matrix[cc ? 2 : 0]); - mpeg2_idct_copy (decoder->DCTblock, dest, stride); -#undef bit_buf -#undef bits -#undef bit_ptr -} - -static inline void slice_non_intra_DCT (mpeg2_decoder_t * const decoder, - const int cc, - uint8_t * const dest, const int stride) -{ - int last; - - if (decoder->mpeg1) - last = get_mpeg1_non_intra_block (decoder); - else - last = get_non_intra_block (decoder, - decoder->quantizer_matrix[cc ? 3 : 1]); - mpeg2_idct_add (last, decoder->DCTblock, dest, stride); -} - -#define MOTION_420(table,ref,motion_x,motion_y,size,y) \ - pos_x = 2 * decoder->offset + motion_x; \ - pos_y = 2 * decoder->v_offset + motion_y + 2 * y; \ - if (unlikely (pos_x > decoder->limit_x)) { \ - pos_x = ((int)pos_x < 0) ? 0 : decoder->limit_x; \ - motion_x = pos_x - 2 * decoder->offset; \ - } \ - if (unlikely (pos_y > decoder->limit_y_ ## size)) { \ - pos_y = ((int)pos_y < 0) ? 0 : decoder->limit_y_ ## size; \ - motion_y = pos_y - 2 * decoder->v_offset - 2 * y; \ - } \ - xy_half = ((pos_y & 1) << 1) | (pos_x & 1); \ - table[xy_half] (decoder->dest[0] + y * decoder->stride + decoder->offset, \ - ref[0] + (pos_x >> 1) + (pos_y >> 1) * decoder->stride, \ - decoder->stride, size); \ - motion_x /= 2; motion_y /= 2; \ - xy_half = ((motion_y & 1) << 1) | (motion_x & 1); \ - offset = (((decoder->offset + motion_x) >> 1) + \ - ((((decoder->v_offset + motion_y) >> 1) + y/2) * \ - decoder->uv_stride)); \ - table[4+xy_half] (decoder->dest[1] + y/2 * decoder->uv_stride + \ - (decoder->offset >> 1), ref[1] + offset, \ - decoder->uv_stride, size/2); \ - table[4+xy_half] (decoder->dest[2] + y/2 * decoder->uv_stride + \ - (decoder->offset >> 1), ref[2] + offset, \ - decoder->uv_stride, size/2) - -#define MOTION_FIELD_420(table,ref,motion_x,motion_y,dest_field,op,src_field) \ - pos_x = 2 * decoder->offset + motion_x; \ - pos_y = decoder->v_offset + motion_y; \ - if (unlikely (pos_x > decoder->limit_x)) { \ - pos_x = ((int)pos_x < 0) ? 0 : decoder->limit_x; \ - motion_x = pos_x - 2 * decoder->offset; \ - } \ - if (unlikely (pos_y > decoder->limit_y)) { \ - pos_y = ((int)pos_y < 0) ? 0 : decoder->limit_y; \ - motion_y = pos_y - decoder->v_offset; \ - } \ - xy_half = ((pos_y & 1) << 1) | (pos_x & 1); \ - table[xy_half] (decoder->dest[0] + dest_field * decoder->stride + \ - decoder->offset, \ - (ref[0] + (pos_x >> 1) + \ - ((pos_y op) + src_field) * decoder->stride), \ - 2 * decoder->stride, 8); \ - motion_x /= 2; motion_y /= 2; \ - xy_half = ((motion_y & 1) << 1) | (motion_x & 1); \ - offset = (((decoder->offset + motion_x) >> 1) + \ - (((decoder->v_offset >> 1) + (motion_y op) + src_field) * \ - decoder->uv_stride)); \ - table[4+xy_half] (decoder->dest[1] + dest_field * decoder->uv_stride + \ - (decoder->offset >> 1), ref[1] + offset, \ - 2 * decoder->uv_stride, 4); \ - table[4+xy_half] (decoder->dest[2] + dest_field * decoder->uv_stride + \ - (decoder->offset >> 1), ref[2] + offset, \ - 2 * decoder->uv_stride, 4) - -#define MOTION_DMV_420(table,ref,motion_x,motion_y) \ - pos_x = 2 * decoder->offset + motion_x; \ - pos_y = decoder->v_offset + motion_y; \ - if (unlikely (pos_x > decoder->limit_x)) { \ - pos_x = ((int)pos_x < 0) ? 0 : decoder->limit_x; \ - motion_x = pos_x - 2 * decoder->offset; \ - } \ - if (unlikely (pos_y > decoder->limit_y)) { \ - pos_y = ((int)pos_y < 0) ? 0 : decoder->limit_y; \ - motion_y = pos_y - decoder->v_offset; \ - } \ - xy_half = ((pos_y & 1) << 1) | (pos_x & 1); \ - offset = (pos_x >> 1) + (pos_y & ~1) * decoder->stride; \ - table[xy_half] (decoder->dest[0] + decoder->offset, \ - ref[0] + offset, 2 * decoder->stride, 8); \ - table[xy_half] (decoder->dest[0] + decoder->stride + decoder->offset, \ - ref[0] + decoder->stride + offset, \ - 2 * decoder->stride, 8); \ - motion_x /= 2; motion_y /= 2; \ - xy_half = ((motion_y & 1) << 1) | (motion_x & 1); \ - offset = (((decoder->offset + motion_x) >> 1) + \ - (((decoder->v_offset >> 1) + (motion_y & ~1)) * \ - decoder->uv_stride)); \ - table[4+xy_half] (decoder->dest[1] + (decoder->offset >> 1), \ - ref[1] + offset, 2 * decoder->uv_stride, 4); \ - table[4+xy_half] (decoder->dest[1] + decoder->uv_stride + \ - (decoder->offset >> 1), \ - ref[1] + decoder->uv_stride + offset, \ - 2 * decoder->uv_stride, 4); \ - table[4+xy_half] (decoder->dest[2] + (decoder->offset >> 1), \ - ref[2] + offset, 2 * decoder->uv_stride, 4); \ - table[4+xy_half] (decoder->dest[2] + decoder->uv_stride + \ - (decoder->offset >> 1), \ - ref[2] + decoder->uv_stride + offset, \ - 2 * decoder->uv_stride, 4) - -#define MOTION_ZERO_420(table,ref) \ - table[0] (decoder->dest[0] + decoder->offset, \ - (ref[0] + decoder->offset + \ - decoder->v_offset * decoder->stride), decoder->stride, 16); \ - offset = ((decoder->offset >> 1) + \ - (decoder->v_offset >> 1) * decoder->uv_stride); \ - table[4] (decoder->dest[1] + (decoder->offset >> 1), \ - ref[1] + offset, decoder->uv_stride, 8); \ - table[4] (decoder->dest[2] + (decoder->offset >> 1), \ - ref[2] + offset, decoder->uv_stride, 8) - -#define MOTION_422(table,ref,motion_x,motion_y,size,y) \ - pos_x = 2 * decoder->offset + motion_x; \ - pos_y = 2 * decoder->v_offset + motion_y + 2 * y; \ - if (unlikely (pos_x > decoder->limit_x)) { \ - pos_x = ((int)pos_x < 0) ? 0 : decoder->limit_x; \ - motion_x = pos_x - 2 * decoder->offset; \ - } \ - if (unlikely (pos_y > decoder->limit_y_ ## size)) { \ - pos_y = ((int)pos_y < 0) ? 0 : decoder->limit_y_ ## size; \ - motion_y = pos_y - 2 * decoder->v_offset - 2 * y; \ - } \ - xy_half = ((pos_y & 1) << 1) | (pos_x & 1); \ - offset = (pos_x >> 1) + (pos_y >> 1) * decoder->stride; \ - table[xy_half] (decoder->dest[0] + y * decoder->stride + decoder->offset, \ - ref[0] + offset, decoder->stride, size); \ - offset = (offset + (motion_x & (motion_x < 0))) >> 1; \ - motion_x /= 2; \ - xy_half = ((pos_y & 1) << 1) | (motion_x & 1); \ - table[4+xy_half] (decoder->dest[1] + y * decoder->uv_stride + \ - (decoder->offset >> 1), ref[1] + offset, \ - decoder->uv_stride, size); \ - table[4+xy_half] (decoder->dest[2] + y * decoder->uv_stride + \ - (decoder->offset >> 1), ref[2] + offset, \ - decoder->uv_stride, size) - -#define MOTION_FIELD_422(table,ref,motion |