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 );
}