+/*****************************************************************************
+ * vpar_motion.c : motion vectors parsing
+ * (c)1999 VideoLAN
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+
+
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/uio.h>
+#include <X11/Xlib.h>
+#include <X11/extensions/XShm.h>
+
+#include "config.h"
+#include "common.h"
+#include "mtime.h"
+#include "vlc_thread.h"
+
+#include "intf_msg.h"
+#include "debug.h" /* ?? temporaire, requis par netlist.h */
+
+#include "input.h"
+#include "input_netlist.h"
+#include "decoder_fifo.h"
+#include "video.h"
+#include "video_output.h"
+
+#include "vdec_idct.h"
+#include "video_decoder.h"
+#include "vdec_motion.h"
+
+#include "vpar_blocks.h"
+#include "vpar_headers.h"
+#include "video_fifo.h"
+#include "vpar_synchro.h"
+#include "video_parser.h"
+#include "vpar_motion.h"
+
+
+/*
+ * Local prototypes
+ */
+
+/****************************************************************************
+ * vpar_MotionCode : Parse the next motion code
+ ****************************************************************************/
+static __inline__ int vpar_MotionCode( vpar_thread_t * p_vpar )
+{
+ int i_code;
+ static lookup_t pl_mv_tab0[8] =
+ { {-1,0}, {3,3}, {2,2}, {2,2}, {1,1}, {1,1}, {1,1}, {1,1} };
+ /* Table B-10, motion_code, codes 0000011 ... 000011x */
+ static lookup_t pl_mv_tab1[8] =
+ { {-1,0}, {-1,0}, {-1,0}, {7,6}, {6,6}, {5,6}, {4,5}, {4,5} };
+ /* Table B-10, motion_code, codes 0000001100 ... 000001011x */
+ static lookup_t pl_mv_tab2[12] = {
+ {16,9}, {15,9}, {14,9}, {13,9},
+ {12,9}, {11,9}, {10,8}, {10,8},
+ {9,8}, {9,8}, {8,8}, {8,8} };
+
+ if( GetBits(&p_vpar->bit_stream, 1) )
+ {
+ return 0;
+ }
+ if( (i_code = ShowBits(&p_vpar->bit_stream, 9)) >= 64 )
+ {
+ i_code >>= 6;
+ RemoveBits( &p_vpar->bit_stream, pl_mv_tab0[i_code].i_length );
+ return( GetBits(&p_vpar->bit_stream, 1) ? -pl_mv_tab0[i_code].i_value : pl_mv_tab0[i_code].i_value );
+ }
+
+ if( i_code >= 24 )
+ {
+ i_code >>= 3;
+ RemoveBits( &p_vpar->bit_stream, pl_mv_tab1[i_code].i_length );
+ return( GetBits(&p_vpar->bit_stream, 1) ? -pl_mv_tab1[i_code].i_value : pl_mv_tab1[i_code].i_value );
+ }
+
+ if( (i_code -= 12) < 0 )
+ {
+ p_vpar->picture.b_error = 1;
+ intf_DbgMsg( "vpar debug: Invalid motion_vector code\n" );
+ return 0;
+ }
+
+ RemoveBits( &p_vpar->bit_stream, pl_mv_tab2[i_code].i_length );
+ return( GetBits(&p_vpar->bit_stream, 1) ? -pl_mv_tab2[i_code].i_value : pl_mv_tab2[i_code].i_value );
+}
+
+/****************************************************************************
+ * vpar_DecodeMotionVector : decode a motion_vector
+ ****************************************************************************/
+static __inline__ void vpar_DecodeMotionVector( int * pi_prediction, int i_r_size,
+ int i_motion_code, int i_motion_residual, int i_full_pel )
+{
+ int i_limit, i_vector;
+
+ /* ISO/IEC 13818-1 section 7.6.3.1 */
+ i_limit = 16 << i_r_size;
+ i_vector = *pi_prediction >> i_full_pel;
+
+ if( i_motion_code > 0 )
+ {
+ i_vector += ((i_motion_code-1) << i_r_size) + i_motion_residual + 1;
+ if( i_vector >= i_limit )
+ i_vector -= i_limit + i_limit;
+ }
+ else if( i_motion_code < 0 )
+ {
+ i_vector -= ((-i_motion_code-1) << i_r_size) + i_motion_residual + 1;
+ if( i_vector < -i_limit )
+ i_vector += i_limit + i_limit;
+ }
+ *pi_prediction = i_vector << i_full_pel;
+}
+
+/****************************************************************************
+ * vpar_MotionVector : Parse the next motion_vector field
+ ****************************************************************************/
+void vpar_MotionVector( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_r,
+ int i_s, int i_full_pel )
+{
+ int i_motion_code, i_motion_residual;
+ int i_r_size;
+
+ i_r_size = p_vpar->picture.ppi_f_code[i_s][0]-1;
+ i_motion_code = vpar_MotionCode( p_vpar );
+ i_motion_residual = (i_r_size != 0 && i_motion_code != 0) ?
+ GetBits( &p_vpar->bit_stream, i_r_size) : 0;
+ vpar_DecodeMotionVector( &p_vpar->slice.pppi_pmv[i_r][i_s][0], i_r_size,
+ i_motion_code, i_motion_residual, i_full_pel );
+ p_mb->pppi_motion_vectors[i_r][i_s][0] = p_vpar->slice.pppi_pmv[i_r][i_s][0];
+
+
+ if( p_vpar->mb.b_dmv )
+ {
+ if( GetBits(&p_vpar->bit_stream, 1) )
+ {
+ p_mb->pi_dm_vector[0] = GetBits( &p_vpar->bit_stream, 1 ) ? -1 : 1;
+ }
+ else
+ {
+ p_mb->pi_dm_vector[0] = 0;
+ }
+ }
+
+ i_r_size = p_vpar->picture.ppi_f_code[i_s][1]-1;
+ i_motion_code = vpar_MotionCode( p_vpar );
+ i_motion_residual = (i_r_size != 0 && i_motion_code != 0) ?
+ GetBits( &p_vpar->bit_stream, i_r_size) : 0;
+
+
+ if( (p_vpar->mb.i_mv_format == MOTION_FIELD) && (p_vpar->picture.i_structure == FRAME_STRUCTURE) )
+ {
+ p_vpar->slice.pppi_pmv[i_r][i_s][1] >>= 1;
+ }
+
+ vpar_DecodeMotionVector( &p_vpar->slice.pppi_pmv[i_r][i_s][1], i_r_size,
+ i_motion_code, i_motion_residual, i_full_pel );
+
+ if( (p_vpar->mb.i_mv_format == MOTION_FIELD) && (p_vpar->picture.i_structure == FRAME_STRUCTURE) )
+ p_vpar->slice.pppi_pmv[i_r][i_s][1] <<= 1;
+
+ p_mb->pppi_motion_vectors[i_r][i_s][1] = p_vpar->slice.pppi_pmv[i_r][i_s][1];
+
+
+ if( p_vpar->mb.b_dmv )
+ {
+ if( GetBits(&p_vpar->bit_stream, 1) )
+ {
+ p_mb->pi_dm_vector[1] = GetBits( &p_vpar->bit_stream, 1 ) ? -1 : 1;
+ }
+ else
+ {
+ p_mb->pi_dm_vector[1] = 0;
+ }
+ }
+}
+
+/*****************************************************************************
+ * vpar_MPEG1MotionVector : Parse the next MPEG-1 motion vectors
+ *****************************************************************************/
+void vpar_MPEG1MotionVector( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_s )
+{
+ vpar_MotionVector( p_vpar, p_mb, 0, i_s, p_vpar->picture.pb_full_pel_vector[i_s] );
+}
+
+/*****************************************************************************
+ * vpar_MPEG2MotionVector : Parse the next MPEG-2 motion_vectors field
+ *****************************************************************************/
+void vpar_MPEG2MotionVector( vpar_thread_t * p_vpar, macroblock_t * p_mb, int i_s )
+{
+ if( p_vpar->mb.i_mv_count == 1 )
+ {
+ if( p_vpar->mb.i_mv_format == MOTION_FIELD && !p_vpar->mb.b_dmv )
+ {
+ p_mb->ppi_field_select[0][i_s] = p_mb->ppi_field_select[1][i_s]
+ = GetBits( &p_vpar->bit_stream, 1 );
+ }
+ vpar_MotionVector( p_vpar, p_mb, 0, i_s, 0 );
+ p_vpar->slice.pppi_pmv[1][i_s][0] = p_vpar->slice.pppi_pmv[0][i_s][0];
+ p_vpar->slice.pppi_pmv[1][i_s][1] = p_vpar->slice.pppi_pmv[0][i_s][1];
+ }
+ else
+ {
+ p_mb->ppi_field_select[0][i_s] = GetBits( &p_vpar->bit_stream, 1 );
+ vpar_MotionVector( p_vpar, p_mb, 0, i_s, 0 );
+ p_mb->ppi_field_select[1][i_s] = GetBits( &p_vpar->bit_stream, 1 );
+ vpar_MotionVector( p_vpar, p_mb, 1, i_s, 0 );
+ }
+}
+
+#if 0
+
/*****************************************************************************
* vpar_motion.c : motion vectors parsing
* (c)1999 VideoLAN
{
i_vector += ((i_motion_code-1) << i_r_size) + i_motion_residual + 1;
if( i_vector >= i_limit )
- i_vector -= i_limit << 1;
+ i_vector -= i_limit + i_limit;
}
else if( i_motion_code < 0 )
{
i_vector -= ((-i_motion_code-1) << i_r_size) + i_motion_residual + 1;
- if( i_vector < i_limit )
- i_vector += i_limit << 1;
+ if( i_vector < -i_limit )
+ i_vector += i_limit + i_limit;
}
*pi_prediction = i_vector << i_full_pel;
i_motion_code = vpar_MotionCode( p_vpar );
i_motion_residual = (i_r_size != 0 && i_motion_code != 0) ?
GetBits( &p_vpar->bit_stream, i_r_size) : 0;
+
+ if( (p_vpar->mb.i_mv_format == MOTION_FIELD) && (p_vpar->picture.b_frame_structure) )
+ p_vpar->slice.pppi_pmv[i_r][i_s][1] >>= 1;
+
vpar_DecodeMotionVector( &p_vpar->slice.pppi_pmv[i_r][i_s][1], i_r_size,
i_motion_code, i_motion_residual, i_full_pel );
+
+ if( (p_vpar->mb.i_mv_format == MOTION_FIELD) && (p_vpar->picture.b_frame_structure) )
+ p_vpar->slice.pppi_pmv[i_r][i_s][1] <<= 1;
+
p_mb->pppi_motion_vectors[i_r][i_s][1] = p_vpar->slice.pppi_pmv[i_r][i_s][1];
if( p_vpar->mb.b_dmv )
= GetBits( &p_vpar->bit_stream, 1 );
}
vpar_MotionVector( p_vpar, p_mb, 0, i_s, 0 );
+ p_vpar->slice.pppi_pmv[1][i_s][0] = p_vpar->slice.pppi_pmv[0][i_s][0];
+ p_vpar->slice.pppi_pmv[1][i_s][1] = p_vpar->slice.pppi_pmv[0][i_s][1];
}
else
{
vpar_MotionVector( p_vpar, p_mb, 1, i_s, 0 );
}
}
+
+#endif
projects / vlc / commitdiff