diff options
Diffstat (limited to 'src/libmpeg2new/libmpeg2/slice.c')
| -rw-r--r-- | src/libmpeg2new/libmpeg2/slice.c | 2058 |
1 files changed, 0 insertions, 2058 deletions
diff --git a/src/libmpeg2new/libmpeg2/slice.c b/src/libmpeg2new/libmpeg2/slice.c deleted file mode 100644 index ce4508639..000000000 --- a/src/libmpeg2new/libmpeg2/slice.c +++ /dev/null @@ -1,2058 +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 - */ - -#include "config.h" - -#include <inttypes.h> - -#include "../include/mpeg2.h" -#include "../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_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 */ - /* 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) * 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_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); \ - offset = (pos_x >> 1) + ((pos_y op) + src_field) * decoder->stride; \ - table[xy_half] (decoder->dest[0] + dest_field * decoder->stride + \ - decoder->offset, ref[0] + offset, \ - 2 * decoder->stride, 8); \ - 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] + dest_field * decoder->uv_stride + \ - (decoder->offset >> 1), ref[1] + offset, \ - 2 * decoder->uv_stride, 8); \ - table[4+xy_half] (decoder->dest[2] + dest_field * decoder->uv_stride + \ - (decoder->offset >> 1), ref[2] + offset, \ - 2 * decoder->uv_stride, 8) - -#define MOTION_DMV_422(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); \ - 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] + (decoder->offset >> 1), \ - ref[1] + offset, 2 * decoder->uv_stride, 8); \ - table[4+xy_half] (decoder->dest[1] + decoder->uv_stride + \ - (decoder->offset >> 1), \ - ref[1] + decoder->uv_stride + offset, \ - 2 * decoder->uv_stride, 8); \ - table[4+xy_half] (decoder->dest[2] + (decoder->offset >> 1), \ - ref[2] + offset, 2 * decoder->uv_stride, 8); \ - table[4+xy_half] (decoder->dest[2] + decoder->uv_stride + \ - (decoder->offset >> 1), \ - ref[2] + decoder->uv_stride + offset, \ - 2 * decoder->uv_stride, 8) - -#define MOTION_ZERO_422(table,ref) \ - offset = decoder->offset + decoder->v_offset * decoder->stride; \ - table[0] (decoder->dest[0] + decoder->offset, \ - ref[0] + offset, decoder->stride, 16); \ - offset >>= 1; \ - table[4] (decoder->dest[1] + (decoder->offset >> 1), \ - ref[1] + offset, decoder->uv_stride, 16); \ - table[4] (decoder->dest[2] + (decoder->offset >> 1), \ - ref[2] + offset, decoder->uv_stride, 16) - -#define MOTION_444(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); \ - table[xy_half] (decoder->dest[1] + y * decoder->stride + decoder->offset, \ - ref[1] + offset, decoder->stride, size); \ - table[xy_half] (decoder->dest[2] + y * decoder->stride + decoder->offset, \ - ref[2] + offset, decoder->stride, size) - -#define MOTION_FIELD_444(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); \ - offset = (pos_x >> 1) + ((pos_y op) + src_field) * decoder->stride; \ - table[xy_half] (decoder->dest[0] + dest_field * decoder->stride + \ - decoder->offset, ref[0] + offset, \ - 2 * decoder->stride, 8); \ - table[xy_half] (decoder->dest[1] + dest_field * decoder->stride + \ - decoder->offset, ref[1] + offset, \ - 2 * decoder->stride, 8); \ - table[xy_half] (decoder->dest[2] + dest_field * decoder->stride + \ - decoder->offset, ref[2] + offset, \ - 2 * decoder->stride, 8) - -#define MOTION_DMV_444(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); \ - table[xy_half] (decoder->dest[1] + decoder->offset, \ - ref[1] + offset, 2 * decoder->stride, 8); \ - table[xy_half] (decoder->dest[1] + decoder->stride + decoder->offset, \ - ref[1] + decoder->stride + offset, \ - 2 * decoder->stride, 8); \ - table[xy_half] (decoder->dest[2] + decoder->offset, \ - ref[2] + offset, 2 * decoder->stride, 8); \ - table[xy_half] (decoder->dest[2] + decoder->stride + decoder->offset, \ - ref[2] + decoder->stride + offset, \ - 2 * decoder->stride, 8) - -#define MOTION_ZERO_444(table,ref) \ - offset = decoder->offset + decoder->v_offset * decoder->stride; \ - table[0] (decoder->dest[0] + decoder->offset, \ - ref[0] + offset, decoder->stride, 16); \ - table[4] (decoder->dest[1] + decoder->offset, \ - ref[1] + offset, decoder->stride, 16); \ - table[4] (decoder->dest[2] + (decoder->offset >> 1), \ - ref[2] + offset, decoder->stride, 16) - -#define bit_buf (decoder->bitstream_buf) -#define bits (decoder->bitstream_bits) -#define bit_ptr (decoder->bitstream_ptr) - -static void motion_mp1 (mpeg2_decoder_t * const decoder, - motion_t * const motion, - mpeg2_mc_fct * const * const table) -{ - int motion_x, motion_y; - unsigned int pos_x, pos_y, xy_half, offset; - - NEEDBITS (bit_buf, bits, bit_ptr); - motion_x = (motion->pmv[0][0] + - (get_motion_delta (decoder, - motion->f_code[0]) << motion->f_code[1])); - motion_x = bound_motion_vector (motion_x, - motion->f_code[0] + motion->f_code[1]); - motion->pmv[0][0] = motion_x; - - NEEDBITS (bit_buf, bits, bit_ptr); - motion_y = (motion->pmv[0][1] + - (get_motion_delta (decoder, - motion->f_code[0]) << motion->f_code[1])); - motion_y = bound_motion_vector (motion_y, - motion->f_code[0] + motion->f_code[1]); - motion->pmv[0][1] = motion_y; - - MOTION_420 (table, motion->ref[0], motion_x, motion_y, 16, 0); -} - -#define MOTION_FUNCTIONS(FORMAT,MOTION,MOTION_FIELD,MOTION_DMV,MOTION_ZERO) \ - \ -static void motion_fr_frame_##FORMAT (mpeg2_decoder_t * const decoder, \ - motion_t * const motion, \ - mpeg2_mc_fct * const * const table) \ -{ \ - int motion_x, motion_y; \ - unsigned int pos_x, pos_y, xy_half, offset; \ - \ - NEEDBITS (bit_buf, bits, bit_ptr); \ - motion_x = motion->pmv[0][0] + get_motion_delta (decoder, \ - 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 (decoder, \ - 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 (table, motion->ref[0], motion_x, motion_y, 16, 0); \ -} \ - \ -static void motion_fr_field_##FORMAT (mpeg2_decoder_t * const decoder, \ - motion_t * const motion, \ - mpeg2_mc_fct * const * const table) \ -{ \ - int motion_x, motion_y, field; \ - unsigned int pos_x, pos_y, xy_half, offset; \ - \ - NEEDBITS (bit_buf, bits, bit_ptr); \ - field = UBITS (bit_buf, 1); \ - DUMPBITS (bit_buf, bits, 1); \ - \ - motion_x = motion->pmv[0][0] + get_motion_delta (decoder, \ - 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 (decoder, motion->f_code[1])); \ - /* motion_y = bound_motion_vector (motion_y, motion->f_code[1]); */ \ - motion->pmv[0][1] = motion_y << 1; \ - \ - MOTION_FIELD (table, motion->ref[0], motion_x, motion_y, 0, & ~1, field); \ - \ - NEEDBITS (bit_buf, bits, bit_ptr); \ - field = UBITS (bit_buf, 1); \ - DUMPBITS (bit_buf, bits, 1); \ - \ - motion_x = motion->pmv[1][0] + get_motion_delta (decoder, \ - 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 (decoder, motion->f_code[1])); \ - /* motion_y = bound_motion_vector (motion_y, motion->f_code[1]); */ \ - motion->pmv[1][1] = motion_y << 1; \ - \ - MOTION_FIELD (table, motion->ref[0], motion_x, motion_y, 1, & ~1, field); \ -} \ - \ -static void motion_fr_dmv_##FORMAT (mpeg2_decoder_t * const decoder, \ - motion_t * const motion, \ - mpeg2_mc_fct * const * const table) \ -{ \ - int motion_x, motion_y, dmv_x, dmv_y, m, other_x, other_y; \ - unsigned int pos_x, pos_y, xy_half, offset; \ - \ - NEEDBITS (bit_buf, bits, bit_ptr); \ - motion_x = motion->pmv[0][0] + get_motion_delta (decoder, \ - 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 (decoder); \ - \ - motion_y = ((motion->pmv[0][1] >> 1) + \ - get_motion_delta (decoder, 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; \ - dmv_y = get_dmv (decoder); \ - \ - m = decoder->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_FIELD (mpeg2_mc.put, motion->ref[0], other_x, other_y, 0, | 1, 0); \ - \ - m = decoder->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_FIELD (mpeg2_mc.put, motion->ref[0], other_x, other_y, 1, & ~1, 0);\ - \ - MOTION_DMV (mpeg2_mc.avg, motion->ref[0], motion_x, motion_y); \ -} \ - \ -static void motion_reuse_##FORMAT (mpeg2_decoder_t * const decoder, \ - motion_t * const motion, \ - mpeg2_mc_fct * const * const table) \ -{ \ - int motion_x, motion_y; \ - unsigned int pos_x, pos_y, xy_half, offset; \ - \ - motion_x = motion->pmv[0][0]; \ - motion_y = motion->pmv[0][1]; \ - \ - MOTION (table, motion->ref[0], motion_x, motion_y, 16, 0); \ -} \ - \ -static void motion_zero_##FORMAT (mpeg2_decoder_t * const decoder, \ - motion_t * const motion, \ - mpeg2_mc_fct * const * const table) \ -{ \ - unsigned int offset; \ - \ - motion->pmv[0][0] = motion->pmv[0][1] = 0; \ - motion->pmv[1][0] = motion->pmv[1][1] = 0; \ - \ - MOTION_ZERO (table, motion->ref[0]); \ -} \ - \ -static void motion_fi_field_##FORMAT (mpeg2_decoder_t * const decoder, \ - motion_t * const motion, \ - mpeg2_mc_fct * const * const table) \ -{ \ - int motion_x, motion_y; \ - uint8_t ** ref_field; \ - unsigned int pos_x, pos_y, xy_half, offset; \ - \ - NEEDBITS (bit_buf, bits, bit_ptr); \ - ref_field = motion->ref2[UBITS (bit_buf, 1)]; \ - DUMPBITS (bit_buf, bits, 1); \ - \ - motion_x = motion->pmv[0][0] + get_motion_delta (decoder, \ - 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 (decoder, \ - 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 (table, ref_field, motion_x, motion_y, 16, 0); \ -} \ - \ -static void motion_fi_16x8_##FORMAT (mpeg2_decoder_t * const decoder, \ - motion_t * const motion, \ - mpeg2_mc_fct * const * const table) \ -{ \ - int motion_x, motion_y; \ - uint8_t ** ref_field; \ - unsigned int pos_x, pos_y, xy_half, offset; \ - \ - NEEDBITS (bit_buf, bits, bit_ptr); \ - ref_field = motion->ref2[UBITS (bit_buf, 1)]; \ - DUMPBITS (bit_buf, bits, 1); \ - \ - motion_x = motion->pmv[0][0] + get_motion_delta (decoder, \ - 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 (decoder, \ - motion->f_code[1]); \ - motion_y = bound_motion_vector (motion_y, motion->f_code[1]); \ - motion->pmv[0][1] = motion_y; \ - \ - MOTION (table, ref_field, motion_x, motion_y, 8, 0); \ - \ - NEEDBITS (bit_buf, bits, bit_ptr); \ - ref_field = motion->ref2[UBITS (bit_buf, 1)]; \ - DUMPBITS (bit_buf, bits, 1); \ - \ - motion_x = motion->pmv[1][0] + get_motion_delta (decoder, \ - 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 (decoder, \ - motion->f_code[1]); \ - motion_y = bound_motion_vector (motion_y, motion->f_code[1]); \ - motion->pmv[1][1] = motion_y; \ - \ - MOTION (table, ref_field, motion_x, motion_y, 8, 8); \ -} \ - \ -static void motion_fi_dmv_##FORMAT (mpeg2_decoder_t * const decoder, \ - motion_t * const motion, \ - mpeg2_mc_fct * const * const table) \ -{ \ - int motion_x, motion_y, other_x, other_y; \ - unsigned int pos_x, pos_y, xy_half, offset; \ - \ - NEEDBITS (bit_buf, bits, bit_ptr); \ - motion_x = motion->pmv[0][0] + get_motion_delta (decoder, \ - 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); \ - other_x = ((motion_x + (motion_x > 0)) >> 1) + get_dmv (decoder); \ - \ - motion_y = motion->pmv[0][1] + get_motion_delta (decoder, \ - 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; \ - other_y = (((motion_y + (motion_y > 0)) >> 1) + get_dmv (decoder) + \ - decoder->dmv_offset); \ - \ - MOTION (mpeg2_mc.put, motion->ref[0], motion_x, motion_y, 16, 0); \ - MOTION (mpeg2_mc.avg, motion->ref[1], other_x, other_y, 16, 0); \ -} \ - -MOTION_FUNCTIONS (420, MOTION_420, MOTION_FIELD_420, MOTION_DMV_420, - MOTION_ZERO_420) -MOTION_FUNCTIONS (422, MOTION_422, MOTION_FIELD_422, MOTION_DMV_422, - MOTION_ZERO_422) -MOTION_FUNCTIONS (444, MOTION_444, MOTION_FIELD_444, MOTION_DMV_444, - MOTION_ZERO_444) - -/* like motion_frame, but parsing without actual motion compensation */ -static void motion_fr_conceal (mpeg2_decoder_t * const decoder) -{ - int tmp; - - NEEDBITS (bit_buf, bits, bit_ptr); - tmp = (decoder->f_motion.pmv[0][0] + - get_motion_delta (decoder, decoder->f_motion.f_code[0])); - tmp = bound_motion_vector (tmp, decoder->f_motion.f_code[0]); - decoder->f_motion.pmv[1][0] = decoder->f_motion.pmv[0][0] = tmp; - - NEEDBITS (bit_buf, bits, bit_ptr); - tmp = (decoder->f_motion.pmv[0][1] + - get_motion_delta (decoder, decoder->f_motion.f_code[1])); - tmp = bound_motion_vector (tmp, decoder->f_motion.f_code[1]); - decoder->f_motion.pmv[1][1] = decoder->f_motion.pmv[0][1] = tmp; - - DUMPBITS (bit_buf, bits, 1); /* remove marker_bit */ -} - -static void motion_fi_conceal (mpeg2_decoder_t * const decoder) -{ - int tmp; - - NEEDBITS (bit_buf, bits, bit_ptr); - DUMPBITS (bit_buf, bits, 1); /* remove field_select */ - - tmp = (decoder->f_motion.pmv[0][0] + - get_motion_delta (decoder, decoder->f_motion.f_code[0])); - tmp = bound_motion_vector (tmp, decoder->f_motion.f_code[0]); - decoder->f_motion.pmv[1][0] = decoder->f_motion.pmv[0][0] = tmp; - - NEEDBITS (bit_buf, bits, bit_ptr); - tmp = (decoder->f_motion.pmv[0][1] + - get_motion_delta (decoder, decoder->f_motion.f_code[1])); - tmp = bound_motion_vector (tmp, decoder->f_motion.f_code[1]); - decoder->f_motion.pmv[1][1] = decoder->f_motion.pmv[0][1] = tmp; - - DUMPBITS (bit_buf, bits, 1); /* remove marker_bit */ -} - -#undef bit_buf -#undef bits -#undef bit_ptr - -#define MOTION_CALL(routine,direction) \ -do { \ - if ((direction) & MACROBLOCK_MOTION_FORWARD) \ - routine (decoder, &(decoder->f_motion), mpeg2_mc.put); \ - if ((direction) & MACROBLOCK_MOTION_BACKWARD) \ - routine (decoder, &(decoder->b_motion), \ - ((direction) & MACROBLOCK_MOTION_FORWARD ? \ - mpeg2_mc.avg : mpeg2_mc.put)); \ -} while (0) - -#define NEXT_MACROBLOCK \ -do { \ - decoder->offset += 16; \ - if (decoder->offset == decoder->width) { \ - do { /* just so we can use the break statement */ \ - if (decoder->convert) { \ - decoder->convert (decoder->convert_id, decoder->dest, \ - decoder->v_offset); \ - if (decoder->coding_type == B_TYPE) \ - break; \ - } \ - decoder->dest[0] += decoder->slice_stride; \ - decoder->dest[1] += decoder->slice_uv_stride; \ - decoder->dest[2] += decoder->slice_uv_stride; \ - } while (0); \ - decoder->v_offset += 16; \ - if (decoder->v_offset > decoder->limit_y) { \ - if (mpeg2_cpu_state_restore) \ - mpeg2_cpu_state_restore (&cpu_state); \ - return; \ - } \ - decoder->offset = 0; \ - } \ -} while (0) - -void mpeg2_init_fbuf (mpeg2_decoder_t * decoder, uint8_t * current_fbuf[3], - uint8_t * forward_fbuf[3], uint8_t * backward_fbuf[3]) -{ - int offset, stride, height, bottom_field; - - stride = decoder->stride_frame; - bottom_field = (decoder->picture_structure == BOTTOM_FIELD); - offset = bottom_field ? stride : 0; - height = decoder->height; - - decoder->picture_dest[0] = current_fbuf[0] + offset; - decoder->picture_dest[1] = current_fbuf[1] + (offset >> 1); - decoder->picture_dest[2] = current_fbuf[2] + (offset >> 1); - - decoder->f_motion.ref[0][0] = forward_fbuf[0] + offset; - decoder->f_motion.ref[0][1] = forward_fbuf[1] + (offset >> 1); - decoder->f_motion.ref[0][2] = forward_fbuf[2] + (offset >> 1); - - decoder->b_motion.ref[0][0] = backward_fbuf[0] + offset; - decoder->b_motion.ref[0][1] = backward_fbuf[1] + (offset >> 1); - decoder->b_motion.ref[0][2] = backward_fbuf[2] + (offset >> 1); - - if (decoder->picture_structure != FRAME_PICTURE) { - decoder->dmv_offset = bottom_field ? 1 : -1; - decoder->f_motion.ref2[0] = decoder->f_motion.ref[bottom_field]; - decoder->f_motion.ref2[1] = decoder->f_motion.ref[!bottom_field]; - decoder->b_motion.ref2[0] = decoder->b_motion.ref[bottom_field]; - decoder->b_motion.ref2[1] = decoder->b_motion.ref[!bottom_field]; - offset = stride - offset; - - if (decoder->second_field && (decoder->coding_type != B_TYPE)) - forward_fbuf = current_fbuf; - - decoder->f_motion.ref[1][0] = forward_fbuf[0] + offset; - decoder->f_motion.ref[1][1] = forward_fbuf[1] + (offset >> 1); - decoder->f_motion.ref[1][2] = forward_fbuf[2] + (offset >> 1); - - decoder->b_motion.ref[1][0] = backward_fbuf[0] + offset; - decoder->b_motion.ref[1][1] = backward_fbuf[1] + (offset >> 1); - decoder->b_motion.ref[1][2] = backward_fbuf[2] + (offset >> 1); - - stride <<= 1; - height >>= 1; - } - - decoder->stride = stride; - decoder->uv_stride = stride >> 1; - decoder->slice_stride = 16 * stride; - decoder->slice_uv_stride = - decoder->slice_stride >> (2 - decoder->chroma_format); - decoder->limit_x = 2 * decoder->width - 32; - decoder->limit_y_16 = 2 * height - 32; - decoder->limit_y_8 = 2 * height - 16; - decoder->limit_y = height - 16; - - if (decoder->mpeg1) { - decoder->motion_parser[0] = motion_zero_420; - decoder->motion_parser[MC_FRAME] = motion_mp1; - decoder->motion_parser[4] = motion_reuse_420; - } else if (decoder->picture_structure == FRAME_PICTURE) { - if (decoder->chroma_format == 0) { - decoder->motion_parser[0] = motion_zero_420; - decoder->motion_parser[MC_FIELD] = motion_fr_field_420; - decoder->motion_parser[MC_FRAME] = motion_fr_frame_420; - decoder->motion_parser[MC_DMV] = motion_fr_dmv_420; - decoder->motion_parser[4] = motion_reuse_420; - } else if (decoder->chroma_format == 1) { - decoder->motion_parser[0] = motion_zero_422; - decoder->motion_parser[MC_FIELD] = motion_fr_field_422; - decoder->motion_parser[MC_FRAME] = motion_fr_frame_422; - decoder->motion_parser[MC_DMV] = motion_fr_dmv_422; - decoder->motion_parser[4] = motion_reuse_422; - } else { - decoder->motion_parser[0] = motion_zero_444; - decoder->motion_parser[MC_FIELD] = motion_fr_field_444; - decoder->motion_parser[MC_FRAME] = motion_fr_frame_444; - decoder->motion_parser[MC_DMV] = motion_fr_dmv_444; - decoder->motion_parser[4] = motion_reuse_444; - } - } else { - if (decoder->chroma_format == 0) { - decoder->motion_parser[0] = motion_zero_420; - decoder->motion_parser[MC_FIELD] = motion_fi_field_420; - decoder->motion_parser[MC_16X8] = motion_fi_16x8_420; - decoder->motion_parser[MC_DMV] = motion_fi_dmv_420; - decoder->motion_parser[4] = motion_reuse_420; - } else if (decoder->chroma_format == 1) { - decoder->motion_parser[0] = motion_zero_422; - decoder->motion_parser[MC_FIELD] = motion_fi_field_422; - decoder->motion_parser[MC_16X8] = motion_fi_16x8_422; - decoder->motion_parser[MC_DMV] = motion_fi_dmv_422; - decoder->motion_parser[4] = motion_reuse_422; - } else { - decoder->motion_parser[0] = motion_zero_444; - decoder->motion_parser[MC_FIELD] = motion_fi_field_444; - decoder->motion_parser[MC_16X8] = motion_fi_16x8_444; - decoder->motion_parser[MC_DMV] = motion_fi_dmv_444; - decoder->motion_parser[4] = motion_reuse_444; - } - } -} - -static inline int slice_init (mpeg2_decoder_t * const decoder, int code) -{ -#define bit_buf (decoder->bitstream_buf) -#define bits (decoder->bitstream_bits) -#define bit_ptr (decoder->bitstream_ptr) - int offset; - const MBAtab * mba; - - decoder->dc_dct_pred[0] = decoder->dc_dct_pred[1] = - decoder->dc_dct_pred[2] = 16384; - - decoder->f_motion.pmv[0][0] = decoder->f_motion.pmv[0][1] = 0; - decoder->f_motion.pmv[1][0] = decoder->f_motion.pmv[1][1] = 0; - decoder->b_motion.pmv[0][0] = decoder->b_motion.pmv[0][1] = 0; - decoder->b_motion.pmv[1][0] = decoder->b_motion.pmv[1][1] = 0; - - if (decoder->vertical_position_extension) { - code += UBITS (bit_buf, 3) << 7; - DUMPBITS (bit_buf, bits, 3); - } - decoder->v_offset = (code - 1) * 16; - offset = 0; - if (!(decoder->convert) || decoder->coding_type != B_TYPE) - offset = (code - 1) * decoder->slice_stride; - - decoder->dest[0] = decoder->picture_dest[0] + offset; - offset >>= (2 - decoder->chroma_format); - decoder->dest[1] = decoder->picture_dest[1] + offset; - decoder->dest[2] = decoder->picture_dest[2] + offset; - - get_quantizer_scale (decoder); - - /* ignore intra_slice and all the extra data */ - while (bit_buf & 0x80000000) { - DUMPBITS (bit_buf, bits, 9); - NEEDBITS (bit_buf, bits, bit_ptr); - } - - /* decode initial macroblock address increment */ - offset = 0; - while (1) { - if (bit_buf >= 0x08000000) { - mba = MBA_5 + (UBITS (bit_buf, 6) - 2); - break; - } else if (bit_buf >= 0x01800000) { - mba = MBA_11 + (UBITS (bit_buf, 12) - 24); - break; - } else switch (UBITS (bit_buf, 12)) { - case 8: /* macroblock_escape */ - offset += 33; - DUMPBITS (bit_buf, bits, 11); - NEEDBITS (bit_buf, bits, bit_ptr); - continue; - case 15: /* macroblock_stuffing (MPEG1 only) */ - bit_buf &= 0xfffff; - DUMPBITS (bit_buf, bits, 11); - NEEDBITS (bit_buf, bits, bit_ptr); - continue; - default: /* error */ - return 1; - } - } - DUMPBITS (bit_buf, bits, mba->len + 1); - decoder->offset = (offset + mba->mba) << 4; - - while (decoder->offset - decoder->width >= 0) { - decoder->offset -= decoder->width; - if (!(decoder->convert) || decoder->coding_type != B_TYPE) { - decoder->dest[0] += decoder->slice_stride; - decoder->dest[1] += decoder->slice_uv_stride; - decoder->dest[2] += decoder->slice_uv_stride; - } - decoder->v_offset += 16; - } - if (decoder->v_offset > decoder->limit_y) - return 1; - - return 0; -#undef bit_buf -#undef bits -#undef bit_ptr -} - -void mpeg2_slice (mpeg2_decoder_t * const decoder, const int code, - const uint8_t * const buffer) -{ -#define bit_buf (decoder->bitstream_buf) -#define bits (decoder->bitstream_bits) -#define bit_ptr (decoder->bitstream_ptr) - cpu_state_t cpu_state; - - bitstream_init (decoder, buffer); - - if (slice_init (decoder, code)) - return; - - if (mpeg2_cpu_state_save) - mpeg2_cpu_state_save (&cpu_state); - - while (1) { - int macroblock_modes; - int mba_inc; - const MBAtab * mba; - - NEEDBITS (bit_buf, bits, bit_ptr); - - macroblock_modes = get_macroblock_modes (decoder); - - /* maybe integrate MACROBLOCK_QUANT test into get_macroblock_modes ? */ - if (macroblock_modes & MACROBLOCK_QUANT) - get_quantizer_scale (decoder); - - if (macroblock_modes & MACROBLOCK_INTRA) { - - int DCT_offset, DCT_stride; - int offset; - uint8_t * dest_y; - - if (decoder->concealment_motion_vectors) { - if (decoder->picture_structure == FRAME_PICTURE) - motion_fr_conceal (decoder); - else - motion_fi_conceal (decoder); - } else { - decoder->f_motion.pmv[0][0] = decoder->f_motion.pmv[0][1] = 0; - decoder->f_motion.pmv[1][0] = decoder->f_motion.pmv[1][1] = 0; - decoder->b_motion.pmv[0][0] = decoder->b_motion.pmv[0][1] = 0; - decoder->b_motion.pmv[1][0] = decoder->b_motion.pmv[1][1] = 0; - } - - if (macroblock_modes & DCT_TYPE_INTERLACED) { - DCT_offset = decoder->stride; - DCT_stride = decoder->stride * 2; - } else { - DCT_offset = decoder->stride * 8; - DCT_stride = decoder->stride; - } - - offset = decoder->offset; - dest_y = decoder->dest[0] + offset; - slice_intra_DCT (decoder, 0, dest_y, DCT_stride); - slice_intra_DCT (decoder, 0, dest_y + 8, DCT_stride); - slice_intra_DCT (decoder, 0, dest_y + DCT_offset, DCT_stride); - slice_intra_DCT (decoder, 0, dest_y + DCT_offset + 8, DCT_stride); - if (likely (decoder->chroma_format == 0)) { - slice_intra_DCT (decoder, 1, decoder->dest[1] + (offset >> 1), - decoder->uv_stride); - slice_intra_DCT (decoder, 2, decoder->dest[2] + (offset >> 1), - decoder->uv_stride); - if (decoder->coding_type == D_TYPE) { - NEEDBITS (bit_buf, bits, bit_ptr); - DUMPBITS (bit_buf, bits, 1); - } - } else if (likely (decoder->chroma_format == 1)) { - uint8_t * dest_u = decoder->dest[1] + (offset >> 1); - uint8_t * dest_v = decoder->dest[2] + (offset >> 1); - DCT_stride >>= 1; - DCT_offset >>= 1; - slice_intra_DCT (decoder, 1, dest_u, DCT_stride); - slice_intra_DCT (decoder, 2, dest_v, DCT_stride); - slice_intra_DCT (decoder, 1, dest_u + DCT_offset, DCT_stride); - slice_intra_DCT (decoder, 2, dest_v + DCT_offset, DCT_stride); - } else { - uint8_t * dest_u = decoder->dest[1] + offset; - uint8_t * dest_v = decoder->dest[2] + offset; - slice_intra_DCT (decoder, 1, dest_u, DCT_stride); - slice_intra_DCT (decoder, 2, dest_v, DCT_stride); - slice_intra_DCT (decoder, 1, dest_u + DCT_offset, DCT_stride); - slice_intra_DCT (decoder, 2, dest_v + DCT_offset, DCT_stride); - slice_intra_DCT (decoder, 1, dest_u + 8, DCT_stride); - slice_intra_DCT (decoder, 2, dest_v + 8, DCT_stride); - slice_intra_DCT (decoder, 1, dest_u + DCT_offset + 8, - DCT_stride); - slice_intra_DCT (decoder, 2, dest_v + DCT_offset + 8, - DCT_stride); - } - } else { - - motion_parser_t * parser; - - parser = - decoder->motion_parser[macroblock_modes >> MOTION_TYPE_SHIFT]; - MOTION_CALL (parser, macroblock_modes); - - if (macroblock_modes & MACROBLOCK_PATTERN) { - int coded_block_pattern; - int DCT_offset, DCT_stride; - - if (macroblock_modes & DCT_TYPE_INTERLACED) { - DCT_offset = decoder->stride; - DCT_stride = decoder->stride * 2; - } else { - DCT_offset = decoder->stride * 8; - DCT_stride = decoder->stride; - } - - coded_block_pattern = get_coded_block_pattern (decoder); - - if (likely (decoder->chroma_format == 0)) { - int offset = decoder->offset; - uint8_t * dest_y = decoder->dest[0] + offset; - if (coded_block_pattern & 1) - slice_non_intra_DCT (decoder, 0, dest_y, DCT_stride); - if (coded_block_pattern & 2) - slice_non_intra_DCT (decoder, 0, dest_y + 8, - DCT_stride); - if (coded_block_pattern & 4) - slice_non_intra_DCT (decoder, 0, dest_y + DCT_offset, - DCT_stride); - if (coded_block_pattern & 8) - slice_non_intra_DCT (decoder, 0, - dest_y + DCT_offset + 8, - DCT_stride); - if (coded_block_pattern & 16) - slice_non_intra_DCT (decoder, 1, - decoder->dest[1] + (offset >> 1), - decoder->uv_stride); - if (coded_block_pattern & 32) - slice_non_intra_DCT (decoder, 2, - decoder->dest[2] + (offset >> 1), - decoder->uv_stride); - } else if (likely (decoder->chroma_format == 1)) { - int offset; - uint8_t * dest_y; - - coded_block_pattern |= bit_buf & (3 << 30); - DUMPBITS (bit_buf, bits, 2); - - offset = decoder->offset; - dest_y = decoder->dest[0] + offset; - if (coded_block_pattern & 1) - slice_non_intra_DCT (decoder, 0, dest_y, DCT_stride); - if (coded_block_pattern & 2) - slice_non_intra_DCT (decoder, 0, dest_y + 8, - DCT_stride); - if (coded_block_pattern & 4) - slice_non_intra_DCT (decoder, 0, dest_y + DCT_offset, - DCT_stride); - if (coded_block_pattern & 8) - slice_non_intra_DCT (decoder, 0, - dest_y + DCT_offset + 8, - DCT_stride); - - DCT_stride >>= 1; - DCT_offset = (DCT_offset + offset) >> 1; - if (coded_block_pattern & 16) - slice_non_intra_DCT (decoder, 1, - decoder->dest[1] + (offset >> 1), - DCT_stride); - if (coded_block_pattern & 32) - slice_non_intra_DCT (decoder, 2, - decoder->dest[2] + (offset >> 1), - DCT_stride); - if (coded_block_pattern & (2 << 30)) - slice_non_intra_DCT (decoder, 1, - decoder->dest[1] + DCT_offset, - DCT_stride); - if (coded_block_pattern & (1 << 30)) - slice_non_intra_DCT (decoder, 2, - decoder->dest[2] + DCT_offset, - DCT_stride); - } else { - int offset; - uint8_t * dest_y, * dest_u, * dest_v; - - coded_block_pattern |= bit_buf & (63 << 26); - DUMPBITS (bit_buf, bits, 6); - - offset = decoder->offset; - dest_y = decoder->dest[0] + offset; - dest_u = decoder->dest[1] + offset; - dest_v = decoder->dest[2] + offset; - - if (coded_block_pattern & 1) - slice_non_intra_DCT (decoder, 0, dest_y, DCT_stride); - if (coded_block_pattern & 2) - slice_non_intra_DCT (decoder, 0, dest_y + 8, - DCT_stride); - if (coded_block_pattern & 4) - slice_non_intra_DCT (decoder, 0, dest_y + DCT_offset, - DCT_stride); - if (coded_block_pattern & 8) - slice_non_intra_DCT (decoder, 0, - dest_y + DCT_offset + 8, - DCT_stride); - - if (coded_block_pattern & 16) - slice_non_intra_DCT (decoder, 1, dest_u, DCT_stride); - if (coded_block_pattern & 32) - slice_non_intra_DCT (decoder, 2, dest_v, DCT_stride); - if (coded_block_pattern & (32 << 26)) - slice_non_intra_DCT (decoder, 1, dest_u + DCT_offset, - DCT_stride); - if (coded_block_pattern & (16 << 26)) - slice_non_intra_DCT (decoder, 2, dest_v + DCT_offset, - DCT_stride); - if (coded_block_pattern & (8 << 26)) - slice_non_intra_DCT (decoder, 1, dest_u + 8, - DCT_stride); - if (coded_block_pattern & (4 << 26)) - slice_non_intra_DCT (decoder, 2, dest_v + 8, - DCT_stride); - if (coded_block_pattern & (2 << 26)) - slice_non_intra_DCT (decoder, 1, - dest_u + DCT_offset + 8, - DCT_stride); - if (coded_block_pattern & (1 << 26)) - slice_non_intra_DCT (decoder, 2, - dest_v + DCT_offset + 8, - DCT_stride); - } - } - - decoder->dc_dct_pred[0] = decoder->dc_dct_pred[1] = - decoder->dc_dct_pred[2] = 16384; - } - - NEXT_MACROBLOCK; - - NEEDBITS (bit_buf, bits, bit_ptr); - mba_inc = 0; - while (1) { - if (bit_buf >= 0x10000000) { - mba = MBA_5 + (UBITS (bit_buf, 5) - 2); - break; - } else if (bit_buf >= 0x03000000) { - mba = MBA_11 + (UBITS (bit_buf, 11) - 24); - break; - } else switch (UBITS (bit_buf, 11)) { - case 8: /* macroblock_escape */ - mba_inc += 33; - /* pass through */ - case 15: /* macroblock_stuffing (MPEG1 only) */ - DUMPBITS (bit_buf, bits, 11); - NEEDBITS (bit_buf, bits, bit_ptr); - continue; - default: /* end of slice, or error */ - if (mpeg2_cpu_state_restore) - mpeg2_cpu_state_restore (&cpu_state); - return; - } - } - DUMPBITS (bit_buf, bits, mba->len); - mba_inc += mba->mba; - - if (mba_inc) { - decoder->dc_dct_pred[0] = decoder->dc_dct_pred[1] = - decoder->dc_dct_pred[2] = 16384; - - if (decoder->coding_type == P_TYPE) { - do { - MOTION_CALL (decoder->motion_parser[0], - MACROBLOCK_MOTION_FORWARD); - NEXT_MACROBLOCK; - } while (--mba_inc); - } else { - do { - MOTION_CALL (decoder->motion_parser[4], macroblock_modes); - NEXT_MACROBLOCK; - } while (--mba_inc); - } - } - } -#undef bit_buf -#undef bits -#undef bit_ptr -} |