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-rw-r--r--apps/plugins/mpegplayer/libmpeg2/slice.c2898
1 files changed, 2898 insertions, 0 deletions
diff --git a/apps/plugins/mpegplayer/libmpeg2/slice.c b/apps/plugins/mpegplayer/libmpeg2/slice.c
new file mode 100644
index 0000000000..926333d5d0
--- /dev/null
+++ b/apps/plugins/mpegplayer/libmpeg2/slice.c
@@ -0,0 +1,2898 @@
+/*
+ * 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
+ *
+ * $Id$
+ * libmpeg2 sync history:
+ * 2008-07-01 - CVS revision 1.55
+ */
+
+#include "plugin.h"
+
+#include "mpeg2dec_config.h"
+
+#include "mpeg2.h"
+#include "attributes.h"
+#include "mpeg2_internal.h"
+
+#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
+}
+
+#if MPEG2_COLOR
+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
+}
+#endif /* MPEG2_COLOR */
+
+#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)
+{
+ uint32_t bit_buf = decoder->bitstream_buf;
+ int bits = decoder->bitstream_bits;
+ const uint8_t * bit_ptr = decoder->bitstream_ptr;
+ const uint8_t * const scan = decoder->scan;
+ int16_t * const dest = decoder->DCTblock;
+ int mismatch = ~dest[0];
+ int i = 0;
+ int j;
+ int val;
+ const DCTtab * tab;
+
+ 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)
+{
+ uint32_t bit_buf = decoder->bitstream_buf;
+ int bits = decoder->bitstream_bits;
+ const uint8_t * bit_ptr = decoder->bitstream_ptr;
+ const uint8_t * const scan = decoder->scan;
+ int16_t * const dest = decoder->DCTblock;
+ int mismatch = ~dest[0];
+ int i = 0;
+ int j;
+ int val;
+ const DCTtab * tab;
+
+ 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)
+{
+ uint32_t bit_buf = decoder->bitstream_buf;
+ int bits = decoder->bitstream_bits;
+ const uint8_t * bit_ptr = decoder->bitstream_ptr;
+ const uint8_t * const scan = decoder->scan;
+ int16_t * const dest = decoder->DCTblock;
+ int mismatch = -1;
+ int i = -1;
+ int j;
+ int val;
+ const DCTtab * tab;
+
+ 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)
+{
+ uint32_t bit_buf = decoder->bitstream_buf;
+ int bits = decoder->bitstream_bits;
+ const uint8_t * bit_ptr = decoder->bitstream_ptr;
+ const uint8_t * const scan = decoder->scan;
+ const uint16_t * const quant_matrix = decoder->quantizer_matrix[0];
+ int16_t * const dest = decoder->DCTblock;
+ int i = 0;
+ int j;
+ int val;
+ const DCTtab * tab;
+
+ 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)
+{
+ uint32_t bit_buf = decoder->bitstream_buf;
+ int bits = decoder->bitstream_bits;
+ const uint8_t * bit_ptr = decoder->bitstream_ptr;
+ const uint8_t * const scan = decoder->scan;
+ const uint16_t * const quant_matrix = decoder->quantizer_matrix[1];
+ int16_t * const dest = decoder->DCTblock;
+ int i = -1;
+ int j;
+ int val;
+ const DCTtab * tab;
+
+ 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->dc_dct_pred[0] += get_luma_dc_dct_diff (decoder);
+ decoder->DCTblock[0] = decoder->dc_dct_pred[0];
+
+ }
+#if MPEG2_COLOR
+ else
+ {
+ decoder->dc_dct_pred[cc] += get_chroma_dc_dct_diff (decoder);
+ decoder->DCTblock[0] = decoder->dc_dct_pred[cc];
+ }
+#endif
+
+ 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);
+}
+
+#if !MPEG2_COLOR
+static void skip_mpeg1_intra_block (mpeg2_decoder_t * const decoder)
+{
+ uint32_t bit_buf = decoder->bitstream_buf;
+ int bits = decoder->bitstream_bits;
+ const uint8_t * bit_ptr = decoder->bitstream_ptr;
+ int i = 0;
+ const DCTtab * tab;
+
+ 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:
+ bit_buf <<= tab->len + 1;
+ bits += tab->len + 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 */
+
+ DUMPBITS (bit_buf, bits, 12);
+ NEEDBITS (bit_buf, bits, bit_ptr);
+
+ if (!(SBITS (bit_buf, 8) & 0x7f))
+ DUMPBITS (bit_buf, bits, 8);
+
+ 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, 2); /* dump end of block code */
+ decoder->bitstream_buf = bit_buf;
+ decoder->bitstream_bits = bits;
+ decoder->bitstream_ptr = bit_ptr;
+}
+
+static void skip_intra_block_B14 (mpeg2_decoder_t * const decoder)
+{
+ uint32_t bit_buf = decoder->bitstream_buf;
+ int bits = decoder->bitstream_bits;
+ const uint8_t * bit_ptr = decoder->bitstream_ptr;
+ int i = 0;
+ const DCTtab * tab;
+
+ 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:
+ bit_buf <<= tab->len + 1;
+ bits += tab->len + 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 */
+
+ DUMPBITS (bit_buf, bits, 12); /* Can't dump more than 16 atm */
+ NEEDBITS (bit_buf, bits, bit_ptr);
+ 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 */
+ }
+
+ DUMPBITS (bit_buf, bits, 2); /* dump end of block code */
+ decoder->bitstream_buf = bit_buf;
+ decoder->bitstream_bits = bits;
+ decoder->bitstream_ptr = bit_ptr;
+}
+
+static void skip_intra_block_B15 (mpeg2_decoder_t * const decoder)
+{
+ uint32_t bit_buf = decoder->bitstream_buf;
+ int bits = decoder->bitstream_bits;
+ const uint8_t * bit_ptr = decoder->bitstream_ptr;
+ int i = 0;
+ const DCTtab * tab;
+
+ 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:
+ bit_buf <<= tab->len + 1;
+ bits += tab->len + 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 */
+
+ DUMPBITS (bit_buf, bits, 12); /* Can't dump more than 16 atm */
+ NEEDBITS (bit_buf, bits, bit_ptr);
+ 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 */
+ }
+
+ DUMPBITS (bit_buf, bits, 4); /* dump end of block code */
+ decoder->bitstream_buf = bit_buf;
+ decoder->bitstream_bits = bits;
+ decoder->bitstream_ptr = bit_ptr;
+}
+
+static void skip_non_intra_block (mpeg2_decoder_t * const decoder)
+{
+ uint32_t bit_buf = decoder->bitstream_buf;
+ int bits = decoder->bitstream_bits;
+ const uint8_t * bit_ptr = decoder->bitstream_ptr;
+ int i = -1;
+ const DCTtab * tab;
+
+ 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:
+ bit_buf <<= tab->len + 1;
+ bits += tab->len + 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 */
+
+ if (decoder->mpeg1)
+ {
+ DUMPBITS (bit_buf, bits, 12);
+ NEEDBITS (bit_buf, bits, bit_ptr);
+
+ if (!(SBITS (bit_buf, 8) & 0x7f))
+ DUMPBITS (bit_buf, bits, 8);
+
+ DUMPBITS (bit_buf, bits, 8);
+ }
+ else
+ {
+ DUMPBITS (bit_buf, bits, 12);
+ NEEDBITS (bit_buf, bits, bit_ptr);
+ 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 */
+ }
+
+ DUMPBITS (bit_buf, bits, 2); /* dump end of block code */
+ decoder->bitstream_buf = bit_buf;
+ decoder->bitstream_bits = bits;
+ decoder->bitstream_ptr = bit_ptr;
+}
+
+static void skip_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;
+
+ 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;
+ bit_buf <<= size;
+ }
+ else
+ {
+ DUMPBITS (bit_buf, bits, 2);
+ }
+ }
+ 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);
+ DUMPBITS (bit_buf, bits, size);
+ }
+
+#undef bit_buf
+#undef bits
+#undef bit_ptr
+}
+
+static void skip_chroma_non_intra (mpeg2_decoder_t * const decoder,
+ uint32_t coded_block_pattern)
+{
+ static const uint32_t cbp_mask[3] =
+ {
+ 0x00000030,
+ 0xc0000030,
+ 0xfc000030,
+ };
+
+ uint32_t cbp = coded_block_pattern &
+ cbp_mask[MIN((unsigned)decoder->chroma_format, 2u)];
+
+ while (cbp)
+ {
+ skip_non_intra_block (decoder);
+ cbp &= (cbp - 1);
+ }
+}
+
+static void skip_chroma_intra (mpeg2_decoder_t * const decoder)
+{
+#define bit_buf (decoder->bitstream_buf)
+#define bits (decoder->bitstream_bits)
+#define bit_ptr (decoder->bitstream_ptr)
+ int i = 2 << decoder->chroma_format;
+
+ if ((unsigned)i > 8)
+ i = 8;
+
+ while (i-- > 0)
+ {
+ NEEDBITS (bit_buf, bits, bit_ptr);
+
+ skip_chroma_dc_dct_diff (decoder);
+
+ if (decoder->mpeg1)
+ {
+ if (decoder->coding_type != D_TYPE)
+ skip_mpeg1_intra_block (decoder);
+ }
+ else if (decoder->intra_vlc_format)
+ {
+ skip_intra_block_B15 (decoder);
+ }
+ else
+ {
+ skip_intra_block_B14 (decoder);
+ }
+ }
+
+ if (decoder->chroma_format == 0 && decoder->coding_type == D_TYPE)
+ {
+ NEEDBITS (bit_buf, bits, bit_ptr);
+ DUMPBITS (bit_buf, bits, 1);
+ }
+
+#undef bit_buf
+#undef bits
+#undef bit_ptr
+}
+#endif /* !MPEG2_COLOR */
+
+#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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ 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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ 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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ 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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ 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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ 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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ 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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ 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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ 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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ 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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ 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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ 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); \
+ \
+ if (MPEG2_COLOR) \
+ { \
+ table[4] (decoder->dest[1] + decoder->offset, \
+ ref[1] + offset, decoder->stride, 16); \
+ table[4] (decoder->dest[2] + decoder->offset, \
+ 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; \
+ \
+ (void)table; \
+ 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; \
+ \
+ (void)table; \
+ 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; \
+ if (MPEG2_COLOR) \
+ { \
+ 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) \
+ return; \
+ \
+ decoder->offset = 0; \
+ } \
+} while (0)
+
+void mpeg2_init_fbuf (mpeg2_decoder_t * decoder,
+ uint8_t * current_fbuf[MPEG2_COMPONENTS],
+ uint8_t * forward_fbuf[MPEG2_COMPONENTS],
+ uint8_t * backward_fbuf[MPEG2_COMPONENTS])
+{
+ 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;
+#if MPEG2_COLOR
+ decoder->picture_dest[1] = current_fbuf[1] + (offset >> 1);
+ decoder->picture_dest[2] = current_fbuf[2] + (offset >> 1);
+#endif
+
+ decoder->f_motion.ref[0][0] = forward_fbuf[0] + offset;
+#if MPEG2_COLOR
+ decoder->f_motion.ref[0][1] = forward_fbuf[1] + (offset >> 1);
+ decoder->f_motion.ref[0][2] = forward_fbuf[2] + (offset >> 1);
+#endif
+
+ decoder->b_motion.ref[0][0] = backward_fbuf[0] + offset;
+#if MPEG2_COLOR
+ decoder->b_motion.ref[0][1] = backward_fbuf[1] + (offset >> 1);
+ decoder->b_motion.ref[0][2] = backward_fbuf[2] + (offset >> 1);
+#endif
+
+ 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;
+#if MPEG2_COLOR
+ decoder->f_motion.ref[1][1] = forward_fbuf[1] + (offset >> 1);
+ decoder->f_motion.ref[1][2] = forward_fbuf[2] + (offset >> 1);
+#endif
+ decoder->b_motion.ref[1][0] = backward_fbuf[0] + offset;
+#if MPEG2_COLOR
+ decoder->b_motion.ref[1][1] = backward_fbuf[1] + (offset >> 1);
+ decoder->b_motion.ref[1][2] = backward_fbuf[2] + (offset >> 1);
+#endif
+ stride <<= 1;
+ height >>= 1;
+ }
+
+ decoder->stride = stride;
+ decoder->slice_stride = 16 * stride;
+#if MPEG2_COLOR
+ decoder->uv_stride = stride >> 1;
+ decoder->slice_uv_stride =
+ decoder->slice_stride >> (2 - decoder->chroma_format);
+#endif
+ 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;
+
+#if MPEG2_COLOR
+ decoder->dc_dct_pred[0] = decoder->dc_dct_pred[1] =
+ decoder->dc_dct_pred[2] = 16384;
+#else
+ decoder->dc_dct_pred[0] = 16384;
+#endif
+
+ 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;
+#if MPEG2_COLOR
+ offset >>= (2 - decoder->chroma_format);
+ decoder->dest[1] = decoder->picture_dest[1] + offset;
+ decoder->dest[2] = decoder->picture_dest[2] + offset;
+#endif
+
+ 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;
+#if MPEG2_COLOR
+ decoder->dest[1] += decoder->slice_uv_stride;
+ decoder->dest[2] += decoder->slice_uv_stride;
+#endif
+ }
+
+ 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)
+
+ bitstream_init (decoder, buffer);
+
+ if (slice_init (decoder, code))
+ return;
+
+ 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 MPEG2_COLOR
+ 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
+ skip_chroma_intra(decoder);
+#endif /* MPEG2_COLOR */
+ }
+ 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 MPEG2_COLOR
+ 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);
+#endif /* MPEG2_COLOR */
+ }
+ 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);
+#if MPEG2_COLOR
+ 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);
+#endif /* MPEG2_COLOR */
+ }
+ else
+ {
+ int offset = decoder->offset;
+ uint8_t * dest_y = decoder->dest[0] + offset;
+#if MPEG2_COLOR
+ uint8_t * dest_u = decoder->dest[1] + offset;
+ uint8_t * dest_v = decoder->dest[2] + offset;
+#endif
+ coded_block_pattern |= bit_buf & (63 << 26);
+ DUMPBITS (bit_buf, bits, 6);
+
+ 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 MPEG2_COLOR
+ 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);
+#endif /* MPEG2_COLOR */
+ }
+#if !MPEG2_COLOR
+ skip_chroma_non_intra(decoder, coded_block_pattern);
+#endif
+ }
+
+#if MPEG2_COLOR
+ decoder->dc_dct_pred[0] = decoder->dc_dct_pred[1] =
+ decoder->dc_dct_pred[2] = 16384;
+#else
+ decoder->dc_dct_pred[0] = 16384;
+#endif
+ }
+
+ 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 */
+ return;
+ }
+ }
+ }
+
+ DUMPBITS (bit_buf, bits, mba->len);
+ mba_inc += mba->mba;
+
+ if (mba_inc)
+ {
+#if MPEG2_COLOR
+ decoder->dc_dct_pred[0] = decoder->dc_dct_pred[1] =
+ decoder->dc_dct_pred[2] = 16384;
+#else
+ decoder->dc_dct_pred[0] = 16384;
+#endif
+ 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
+}