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|
/*****************************************************************************
* video_decoder.c : video decoder thread
*****************************************************************************
* Copyright (C) 1999-2001 VideoLAN
* $Id: video_decoder.c,v 1.2 2001/11/28 15:08:05 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Michel Lespinasse <walken@zoy.org>
*
* This program 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.
*
* This program 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, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include "defs.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* getpid() */
#endif
#include <stdlib.h> /* free() */
#include <string.h> /* memcpy(), memset() */
#include <errno.h> /* errno */
#include "config.h"
#include "common.h"
#include "intf_msg.h"
#include "threads.h"
#include "mtime.h"
#include "video.h"
#include "video_output.h"
#include "modules_export.h"
#include "stream_control.h"
#include "input_ext-dec.h"
#include "vdec_ext-plugins.h"
#include "video_decoder.h"
#include "vpar_pool.h"
#include "video_parser.h"
/*
* Local prototypes
*/
static void RunThread ( vdec_thread_t *p_vdec );
/*****************************************************************************
* vdec_CreateThread: create a video decoder thread
*****************************************************************************
* This function creates a new video decoder thread, and returns a pointer
* to its description. On error, it returns NULL.
*****************************************************************************/
vdec_thread_t * vdec_CreateThread( vdec_pool_t * p_pool )
{
vdec_thread_t * p_vdec;
intf_DbgMsg("vdec debug: creating video decoder thread");
/* Allocate the memory needed to store the thread's structure */
if ( (p_vdec = (vdec_thread_t *)malloc( sizeof(vdec_thread_t) )) == NULL )
{
intf_ErrMsg("vdec error: not enough memory for vdec_CreateThread() to create the new thread");
return( NULL );
}
/*
* Initialize the thread properties
*/
p_vdec->b_die = 0;
/*
* Initialize the parser properties
*/
p_vdec->p_pool = p_pool;
/* Spawn the video decoder thread */
if ( vlc_thread_create(&p_vdec->thread_id, "video decoder",
(vlc_thread_func_t)RunThread, (void *)p_vdec) )
{
intf_ErrMsg("vdec error: can't spawn video decoder thread");
free( p_vdec );
return( NULL );
}
intf_DbgMsg("vdec debug: video decoder thread (%p) created", p_vdec);
return( p_vdec );
}
/*****************************************************************************
* vdec_DestroyThread: destroy a video decoder thread
*****************************************************************************/
void vdec_DestroyThread( vdec_thread_t *p_vdec )
{
intf_DbgMsg("vdec debug: requesting termination of video decoder thread %p", p_vdec);
/* Ask thread to kill itself */
p_vdec->b_die = 1;
/* Make sure the decoder thread leaves the vpar_GetMacroblock() function */
vlc_mutex_lock( &p_vdec->p_pool->lock );
vlc_cond_broadcast( &p_vdec->p_pool->wait_undecoded );
vlc_mutex_unlock( &p_vdec->p_pool->lock );
/* Waiting for the decoder thread to exit */
vlc_thread_join( p_vdec->thread_id );
}
/* following functions are local */
/*****************************************************************************
* vdec_InitThread: initialize video decoder thread
*****************************************************************************
* This function is called from RunThread and performs the second step of the
* initialization.
*****************************************************************************/
void vdec_InitThread( vdec_thread_t * p_vdec )
{
intf_DbgMsg("vdec debug: initializing video decoder thread %p", p_vdec);
#if !defined(SYS_BEOS)
# if VDEC_NICE
/* Re-nice ourself - otherwise we would steal CPU time from the video
* output, which would make a poor display. */
# if !defined(WIN32)
if( nice(VDEC_NICE) == -1 )
# else
if( !SetThreadPriority( GetCurrentThread(),
THREAD_PRIORITY_BELOW_NORMAL ) )
# endif
{
intf_WarnMsg( 2, "vpar warning : couldn't nice() (%s)",
strerror(errno) );
}
# endif
#endif
p_vdec->p_idct_data = NULL;
p_vdec->p_pool->pf_idct_init( &p_vdec->p_idct_data );
/* Mark thread as running and return */
intf_DbgMsg("vdec debug: InitThread(%p) succeeded", p_vdec);
}
/*****************************************************************************
* vdec_EndThread: thread destruction
*****************************************************************************
* This function is called when the thread ends after a sucessful
* initialization.
*****************************************************************************/
void vdec_EndThread( vdec_thread_t * p_vdec )
{
intf_DbgMsg("vdec debug: EndThread(%p)", p_vdec);
if( p_vdec->p_idct_data != NULL )
{
free( p_vdec->p_idct_data );
}
free( p_vdec );
}
/*****************************************************************************
* MotionBlock: does one component of the motion compensation
*****************************************************************************/
static __inline__ void MotionBlock( vdec_pool_t * p_pool,
boolean_t b_average,
int i_x_pred, int i_y_pred,
yuv_data_t * pp_dest[3], int i_dest_offset,
yuv_data_t * pp_src[3], int i_src_offset,
int i_stride, int i_height,
boolean_t b_second_half,
int i_chroma_format )
{
int i_xy_half;
yuv_data_t * p_src1;
yuv_data_t * p_src2;
i_xy_half = ((i_y_pred & 1) << 1) | (i_x_pred & 1);
p_src1 = pp_src[0] + i_src_offset
+ (i_x_pred >> 1) + (i_y_pred >> 1) * i_stride
+ b_second_half * (i_stride << 3);
p_pool->ppppf_motion[b_average][0][i_xy_half]
( pp_dest[0] + i_dest_offset + b_second_half * (i_stride << 3),
p_src1, i_stride, i_height );
if( i_chroma_format != CHROMA_NONE )
{
/* Expanded at compile-time. */
if( i_chroma_format != CHROMA_444 )
{
i_x_pred /= 2;
i_stride >>= 1;
i_src_offset >>= 1;
i_dest_offset >>= 1;
}
if( i_chroma_format == CHROMA_420 )
{
i_y_pred /= 2;
i_height >>= 1;
}
i_xy_half = ((i_y_pred & 1) << 1) | (i_x_pred & 1);
i_src_offset += b_second_half * (i_stride << 3);
i_dest_offset += b_second_half * (i_stride << 3);
p_src1 = pp_src[1] + i_src_offset
+ (i_x_pred >> 1) + (i_y_pred >> 1) * i_stride;
p_src2 = pp_src[2] + i_src_offset
+ (i_x_pred >> 1) + (i_y_pred >> 1) * i_stride;
p_pool->ppppf_motion[b_average][(i_chroma_format != CHROMA_444)]
[i_xy_half]
( pp_dest[1] + i_dest_offset, p_src1, i_stride, i_height );
p_pool->ppppf_motion[b_average][(i_chroma_format != CHROMA_444)]
[i_xy_half]
( pp_dest[2] + i_dest_offset, p_src2, i_stride, i_height );
}
}
/*****************************************************************************
* DecodeMacroblock: decode a macroblock
*****************************************************************************/
#define DECODE_INTRA_BLOCK( i_b, p_dest, I_CHROMA ) \
p_idct = &p_mb->p_idcts[i_b]; \
p_idct->pf_idct( p_idct->pi_block, p_dest, \
i_b < 4 ? i_lum_dct_stride : \
I_CHROMA == CHROMA_420 ? \
p_vpar->picture.i_field_width >> 1 : \
i_chrom_dct_stride, \
p_vdec->p_idct_data, p_idct->i_sparse_pos );
#define DECODE_NONINTRA_BLOCK( i_b, p_dest, I_CHROMA ) \
if( p_mb->i_coded_block_pattern & (1 << (11 - (i_b))) ) \
{ \
DECODE_INTRA_BLOCK( i_b, p_dest, I_CHROMA ); \
}
#define DECLARE_DECODEMB( PSZ_NAME, I_CHROMA ) \
void PSZ_NAME ( vdec_thread_t *p_vdec, macroblock_t * p_mb ) \
{ \
int i, i_lum_dct_offset, i_lum_dct_stride; \
/* This is to keep the compiler happy with CHROMA_420 and CHROMA_NONE */\
int i_chrom_dct_offset __attribute__((unused)); \
int i_chrom_dct_stride __attribute__((unused)); \
idct_inner_t * p_idct; \
vdec_pool_t * p_pool = p_vdec->p_pool; \
vpar_thread_t * p_vpar = p_pool->p_vpar; \
\
if( p_mb->i_mb_modes & DCT_TYPE_INTERLACED ) \
{ \
i_lum_dct_offset = p_vpar->picture.i_field_width; \
i_lum_dct_stride = p_vpar->picture.i_field_width * 2; \
if( I_CHROMA == CHROMA_422 ) \
{ \
i_chrom_dct_offset = p_vpar->picture.i_field_width >> 1; \
i_chrom_dct_stride = p_vpar->picture.i_field_width; \
} \
else if( I_CHROMA == CHROMA_444 ) \
{ \
i_chrom_dct_offset = p_vpar->picture.i_field_width; \
i_chrom_dct_stride = p_vpar->picture.i_field_width * 2; \
} \
} \
else \
{ \
i_lum_dct_offset = p_vpar->picture.i_field_width * 8; \
i_lum_dct_stride = p_vpar->picture.i_field_width; \
if( I_CHROMA == CHROMA_422 ) \
{ \
i_chrom_dct_offset = p_vpar->picture.i_field_width * 4; \
i_chrom_dct_stride = p_vpar->picture.i_field_width >> 1; \
} \
else if( I_CHROMA == CHROMA_444 ) \
{ \
i_chrom_dct_offset = p_vpar->picture.i_field_width * 8; \
i_chrom_dct_stride = p_vpar->picture.i_field_width; \
} \
} \
\
if( !(p_mb->i_mb_modes & MB_INTRA) ) \
{ \
/* \
* Motion Compensation (ISO/IEC 13818-2 section 7.6) \
*/ \
for( i = 0; i < p_mb->i_nb_motions; i++ ) \
{ \
motion_inner_t * p_motion = &p_mb->p_motions[i]; \
MotionBlock( p_pool, p_motion->b_average, \
p_motion->i_x_pred, p_motion->i_y_pred, \
p_mb->pp_dest, p_motion->i_dest_offset, \
p_motion->pp_source, p_motion->i_src_offset, \
p_motion->i_stride, p_motion->i_height, \
p_motion->b_second_half, I_CHROMA ); \
} \
\
/* \
* Inverse DCT (ISO/IEC 13818-2 section Annex A) and \
* adding prediction and coefficient data (ISO/IEC \
* 13818-2 section 7.6.8) \
*/ \
DECODE_NONINTRA_BLOCK( 0, p_mb->p_y_data, I_CHROMA ); \
DECODE_NONINTRA_BLOCK( 1, p_mb->p_y_data + 8, I_CHROMA ); \
DECODE_NONINTRA_BLOCK( 2, p_mb->p_y_data + i_lum_dct_offset, \
I_CHROMA ); \
DECODE_NONINTRA_BLOCK( 3, p_mb->p_y_data + i_lum_dct_offset + 8, \
I_CHROMA ); \
if( I_CHROMA != CHROMA_NONE ) \
{ \
DECODE_NONINTRA_BLOCK( 4, p_mb->p_u_data, I_CHROMA ); \
DECODE_NONINTRA_BLOCK( 5, p_mb->p_v_data, I_CHROMA ); \
if( I_CHROMA != CHROMA_420 ) \
{ \
DECODE_NONINTRA_BLOCK( 6, p_mb->p_u_data \
+ i_chrom_dct_offset, I_CHROMA );\
DECODE_NONINTRA_BLOCK( 7, p_mb->p_v_data \
+ i_chrom_dct_offset, I_CHROMA );\
if( I_CHROMA == CHROMA_444 ) \
{ \
DECODE_NONINTRA_BLOCK( 8, p_mb->p_u_data + 8, \
I_CHROMA ); \
DECODE_NONINTRA_BLOCK( 9, p_mb->p_v_data + 8, \
I_CHROMA ); \
DECODE_NONINTRA_BLOCK( 10, p_mb->p_u_data + 8 \
+ i_chrom_dct_offset, I_CHROMA );\
DECODE_NONINTRA_BLOCK( 11, p_mb->p_v_data + 8 \
+ i_chrom_dct_offset, I_CHROMA );\
} \
} \
} \
} \
else \
{ \
/* Intra macroblock */ \
DECODE_INTRA_BLOCK( 0, p_mb->p_y_data, I_CHROMA ); \
DECODE_INTRA_BLOCK( 1, p_mb->p_y_data + 8, I_CHROMA ); \
DECODE_INTRA_BLOCK( 2, p_mb->p_y_data + i_lum_dct_offset, \
I_CHROMA ); \
DECODE_INTRA_BLOCK( 3, p_mb->p_y_data + i_lum_dct_offset + 8, \
I_CHROMA ); \
if( I_CHROMA != CHROMA_NONE ) \
{ \
DECODE_INTRA_BLOCK( 4, p_mb->p_u_data, I_CHROMA ); \
DECODE_INTRA_BLOCK( 5, p_mb->p_v_data, I_CHROMA ); \
if( I_CHROMA != CHROMA_420 ) \
{ \
DECODE_INTRA_BLOCK( 6, p_mb->p_u_data \
+ i_chrom_dct_offset, I_CHROMA ); \
DECODE_INTRA_BLOCK( 7, p_mb->p_v_data \
+ i_chrom_dct_offset, I_CHROMA ); \
if( I_CHROMA == CHROMA_444 ) \
{ \
DECODE_INTRA_BLOCK( 8, p_mb->p_u_data + 8, I_CHROMA ); \
DECODE_INTRA_BLOCK( 9, p_mb->p_v_data + 8, I_CHROMA ); \
DECODE_INTRA_BLOCK( 10, p_mb->p_u_data + 8 \
+ i_chrom_dct_offset, I_CHROMA );\
DECODE_INTRA_BLOCK( 11, p_mb->p_v_data + 8 \
+ i_chrom_dct_offset, I_CHROMA );\
} \
} \
} \
} \
}
DECLARE_DECODEMB( vdec_DecodeMacroblockBW, CHROMA_NONE );
DECLARE_DECODEMB( vdec_DecodeMacroblock420, CHROMA_420 );
DECLARE_DECODEMB( vdec_DecodeMacroblock422, CHROMA_422 );
DECLARE_DECODEMB( vdec_DecodeMacroblock444, CHROMA_444 );
#undef DECLARE_DECODEMB
/*****************************************************************************
* RunThread: video decoder thread
*****************************************************************************
* Video decoder thread. This function does only return when the thread is
* terminated.
*****************************************************************************/
static void RunThread( vdec_thread_t *p_vdec )
{
intf_DbgMsg("vdec debug: running video decoder thread (%p) (pid == %i)",
p_vdec, getpid());
vdec_InitThread( p_vdec );
/*
* Main loop
*/
while( !p_vdec->b_die )
{
macroblock_t * p_mb;
if( (p_mb = vpar_GetMacroblock( p_vdec->p_pool, &p_vdec->b_die )) != NULL )
{
p_vdec->p_pool->pf_vdec_decode( p_vdec, p_mb );
/* Decoding is finished, release the macroblock and free
* unneeded memory. */
p_vdec->p_pool->pf_free_mb( p_vdec->p_pool, p_mb );
}
}
/* End of thread */
vdec_EndThread( p_vdec );
}
|
