static void *x264_lookahead_thread( x264_t *h )
{
while( !h->lookahead->b_exit_thread )
{
x264_pthread_mutex_lock( &h->lookahead->ifbuf.mutex );
x264_pthread_mutex_lock( &h->lookahead->next.mutex );
int shift = X264_MIN( h->lookahead->next.i_max_size - h->lookahead->next.i_size, h->lookahead->ifbuf.i_size );
x264_lookahead_shift( &h->lookahead->next, &h->lookahead->ifbuf, shift );
x264_pthread_mutex_unlock( &h->lookahead->next.mutex );
if( h->lookahead->next.i_size <= h->lookahead->i_slicetype_length + h->param.b_vfr_input )
{
while( !h->lookahead->ifbuf.i_size && !h->lookahead->b_exit_thread )
x264_pthread_cond_wait( &h->lookahead->ifbuf.cv_fill, &h->lookahead->ifbuf.mutex );
x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
}
else
{
x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
x264_lookahead_slicetype_decide( h );
}
} /* end of input frames */
x264_pthread_mutex_lock( &h->lookahead->ifbuf.mutex );
x264_pthread_mutex_lock( &h->lookahead->next.mutex );
x264_lookahead_shift( &h->lookahead->next, &h->lookahead->ifbuf, h->lookahead->ifbuf.i_size );
x264_pthread_mutex_unlock( &h->lookahead->next.mutex );
x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
while( h->lookahead->next.i_size )
x264_lookahead_slicetype_decide( h );
x264_pthread_mutex_lock( &h->lookahead->ofbuf.mutex );
h->lookahead->b_thread_active = 0;
x264_pthread_cond_broadcast( &h->lookahead->ofbuf.cv_fill );
x264_pthread_mutex_unlock( &h->lookahead->ofbuf.mutex );
return NULL;
}
static void x264_lookahead_thread( x264_t *h )
{
int shift;
#ifdef HAVE_MMX
if( h->param.cpu&X264_CPU_SSE_MISALIGN )
x264_cpu_mask_misalign_sse();
#endif
while( !h->lookahead->b_exit_thread )
{
x264_pthread_mutex_lock( &h->lookahead->ifbuf.mutex );
x264_pthread_mutex_lock( &h->lookahead->next.mutex );
shift = X264_MIN( h->lookahead->next.i_max_size - h->lookahead->next.i_size, h->lookahead->ifbuf.i_size );
x264_lookahead_shift( &h->lookahead->next, &h->lookahead->ifbuf, shift );
x264_pthread_mutex_unlock( &h->lookahead->next.mutex );
if( h->lookahead->next.i_size <= h->lookahead->i_slicetype_length )
{
while( !h->lookahead->ifbuf.i_size && !h->lookahead->b_exit_thread )
x264_pthread_cond_wait( &h->lookahead->ifbuf.cv_fill, &h->lookahead->ifbuf.mutex );
x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
}
else
{
x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
x264_lookahead_slicetype_decide( h );
}
} /* end of input frames */
#ifdef ERR1
x264_pthread_mutex_lock( &h->lookahead->next.mutex );
x264_pthread_mutex_lock( &h->lookahead->ifbuf.mutex );
#else
x264_pthread_mutex_lock( &h->lookahead->ifbuf.mutex );
x264_pthread_mutex_lock( &h->lookahead->next.mutex );
#endif
x264_lookahead_shift( &h->lookahead->next, &h->lookahead->ifbuf, h->lookahead->ifbuf.i_size );
#ifdef ERR1
x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
x264_pthread_mutex_unlock( &h->lookahead->next.mutex );
#else
x264_pthread_mutex_unlock( &h->lookahead->next.mutex );
x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
#endif
while( h->lookahead->next.i_size )
x264_lookahead_slicetype_decide( h );
x264_pthread_mutex_lock( &h->lookahead->ofbuf.mutex );
h->lookahead->b_thread_active = 0;
x264_pthread_cond_broadcast( &h->lookahead->ofbuf.cv_fill );
x264_pthread_mutex_unlock( &h->lookahead->ofbuf.mutex );
}
void x264_lookahead_get_frames( x264_t *h )
{
if( h->param.i_sync_lookahead )
{ /* We have a lookahead thread, so get frames from there */
x264_pthread_mutex_lock( &h->lookahead->ofbuf.mutex );
while( !h->lookahead->ofbuf.i_size && h->lookahead->b_thread_active )
x264_pthread_cond_wait( &h->lookahead->ofbuf.cv_fill, &h->lookahead->ofbuf.mutex );
x264_lookahead_encoder_shift( h );
x264_pthread_mutex_unlock( &h->lookahead->ofbuf.mutex );
}
else
{ /* We are not running a lookahead thread, so perform all the slicetype decide on the fly */
if( h->frames.current[0] || !h->lookahead->next.i_size )
return;
x264_stack_align( x264_slicetype_decide, h );
int bframes=0;
while( IS_X264_TYPE_B( h->lookahead->next.list[bframes]->i_type ) )
bframes++;
x264_lookahead_update_last_nonb( h, h->lookahead->next.list[bframes] );
x264_lookahead_shift( &h->lookahead->ofbuf, &h->lookahead->next, bframes + 1 );
/* For MB-tree and VBV lookahead, we have to perform propagation analysis on I-frames too. */
if( h->lookahead->b_analyse_keyframe && IS_X264_TYPE_I( h->lookahead->last_nonb->i_type ) )
x264_stack_align( x264_slicetype_analyse, h, 1 );
x264_lookahead_encoder_shift( h );
}
}
static void x264_lookahead_slicetype_decide( x264_t *h )
{
x264_stack_align( x264_slicetype_decide, h );
x264_lookahead_update_last_nonb( h, h->lookahead->next.list[0] );
x264_pthread_mutex_lock( &h->lookahead->ofbuf.mutex );
while( h->lookahead->ofbuf.i_size == h->lookahead->ofbuf.i_max_size )
x264_pthread_cond_wait( &h->lookahead->ofbuf.cv_empty, &h->lookahead->ofbuf.mutex );
x264_pthread_mutex_lock( &h->lookahead->next.mutex );
x264_lookahead_shift( &h->lookahead->ofbuf, &h->lookahead->next, h->lookahead->next.list[0]->i_bframes + 1 );
x264_pthread_mutex_unlock( &h->lookahead->next.mutex );
/* For MB-tree and VBV lookahead, we have to perform propagation analysis on I-frames too. */
if( h->lookahead->b_analyse_keyframe && IS_X264_TYPE_I( h->lookahead->last_nonb->i_type ) )
x264_stack_align( x264_slicetype_analyse, h, 1 );
x264_pthread_mutex_unlock( &h->lookahead->ofbuf.mutex );
}