frame.c 27.6 KB
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/*****************************************************************************
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 * frame.c: frame handling
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 *****************************************************************************
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 * Copyright (C) 2003-2011 x264 project
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 *
 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
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 *          Loren Merritt <lorenm@u.washington.edu>
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 *          Fiona Glaser <fiona@x264.com>
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 *
 * 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
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
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 *
 * This program is also available under a commercial proprietary license.
 * For more information, contact us at licensing@x264.com.
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 *****************************************************************************/

#include "common.h"

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static int align_stride( int x, int align, int disalign )
{
    x = ALIGN( x, align );
    if( !(x&(disalign-1)) )
        x += align;
    return x;
}

static int align_plane_size( int x, int disalign )
{
    if( !(x&(disalign-1)) )
        x += 128;
    return x;
}

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static int x264_frame_internal_csp( int external_csp )
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{
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    switch( external_csp & X264_CSP_MASK )
    {
        case X264_CSP_NV12:
        case X264_CSP_I420:
        case X264_CSP_YV12:
            return X264_CSP_NV12;
        case X264_CSP_I444:
        case X264_CSP_YV24:
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        case X264_CSP_BGR:
        case X264_CSP_BGRA:
        case X264_CSP_RGB:
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            return X264_CSP_I444;
        default:
            return X264_CSP_NONE;
    }
}
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static x264_frame_t *x264_frame_new( x264_t *h, int b_fdec )
{
    x264_frame_t *frame;
    int i_csp = x264_frame_internal_csp( h->param.i_csp );
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    int i_mb_count = h->mb.i_mb_count;
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    int i_stride, i_width, i_lines;
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    int i_padv = PADV << PARAM_INTERLACED;
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    int align = h->param.cpu&X264_CPU_CACHELINE_64 ? 64 : h->param.cpu&X264_CPU_CACHELINE_32 ? 32 : 16;
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    int disalign = h->param.cpu&X264_CPU_ALTIVEC ? 1<<9 : 1<<10;
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    int luma_plane_count = i_csp == X264_CSP_NV12 ? 1 : 3;
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    CHECKED_MALLOCZERO( frame, sizeof(x264_frame_t) );
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    /* allocate frame data (+64 for extra data for me) */
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    i_width  = h->mb.i_mb_width*16;
    i_lines  = h->mb.i_mb_height*16;
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    i_stride = align_stride( i_width + 2*PADH, align, disalign );
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    if( i_csp == X264_CSP_NV12 )
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    {
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        frame->i_plane = 2;
        for( int i = 0; i < 2; i++ )
        {
            frame->i_width[i] = i_width >> i;
            frame->i_lines[i] = i_lines >> i;
            frame->i_stride[i] = i_stride;
        }
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    }
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    else if( i_csp == X264_CSP_I444 )
    {
        frame->i_plane = 3;
        for( int i = 0; i < 3; i++ )
        {
            frame->i_width[i] = i_width;
            frame->i_lines[i] = i_lines;
            frame->i_stride[i] = i_stride;
        }
    }
    else
        goto fail;
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    frame->i_width_lowres = frame->i_width[0]/2;
    frame->i_lines_lowres = frame->i_lines[0]/2;
    frame->i_stride_lowres = align_stride( frame->i_width_lowres + 2*PADH, align, disalign<<1 );

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    for( int i = 0; i < h->param.i_bframe + 2; i++ )
        for( int j = 0; j < h->param.i_bframe + 2; j++ )
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            CHECKED_MALLOC( frame->i_row_satds[i][j], i_lines/16 * sizeof(int) );

    frame->i_poc = -1;
    frame->i_type = X264_TYPE_AUTO;
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    frame->i_qpplus1 = X264_QP_AUTO;
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    frame->i_pts = -1;
    frame->i_frame = -1;
    frame->i_frame_num = -1;
    frame->i_lines_completed = -1;
    frame->b_fdec = b_fdec;
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    frame->i_pic_struct = PIC_STRUCT_AUTO;
    frame->i_field_cnt = -1;
    frame->i_duration =
    frame->i_cpb_duration =
    frame->i_dpb_output_delay =
    frame->i_cpb_delay = 0;
    frame->i_coded_fields_lookahead =
    frame->i_cpb_delay_lookahead = -1;

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    frame->orig = frame;
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    if( i_csp == X264_CSP_NV12 )
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    {
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        int chroma_plane_size = (frame->i_stride[1] * (frame->i_lines[1] + i_padv));
        CHECKED_MALLOC( frame->buffer[1], chroma_plane_size * sizeof(pixel) );
        frame->plane[1] = frame->buffer[1] + frame->i_stride[1] * i_padv/2 + PADH;
        if( PARAM_INTERLACED )
        {
            CHECKED_MALLOC( frame->buffer_fld[1], chroma_plane_size * sizeof(pixel) );
            frame->plane_fld[1] = frame->buffer_fld[1] + frame->i_stride[1] * i_padv/2 + PADH;
        }
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    }
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    /* all 4 luma planes allocated together, since the cacheline split code
     * requires them to be in-phase wrt cacheline alignment. */
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    for( int p = 0; p < luma_plane_count; p++ )
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    {
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        int luma_plane_size = align_plane_size( frame->i_stride[p] * (frame->i_lines[p] + 2*i_padv), disalign );
        if( h->param.analyse.i_subpel_refine && b_fdec )
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        {
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            /* FIXME: Don't allocate both buffers in non-adaptive MBAFF. */
            CHECKED_MALLOC( frame->buffer[p], 4*luma_plane_size * sizeof(pixel) );
            if( PARAM_INTERLACED )
                CHECKED_MALLOC( frame->buffer_fld[p], 4*luma_plane_size * sizeof(pixel) );
            for( int i = 0; i < 4; i++ )
            {
                frame->filtered[p][i] = frame->buffer[p] + i*luma_plane_size + frame->i_stride[p] * i_padv + PADH;
                frame->filtered_fld[p][i] = frame->buffer_fld[p] + i*luma_plane_size + frame->i_stride[p] * i_padv + PADH;
            }
            frame->plane[p] = frame->filtered[p][0];
            frame->plane_fld[p] = frame->filtered_fld[p][0];
        }
        else
        {
            CHECKED_MALLOC( frame->buffer[p], luma_plane_size * sizeof(pixel) );
            if( PARAM_INTERLACED )
                CHECKED_MALLOC( frame->buffer_fld[p], luma_plane_size * sizeof(pixel) );
            frame->filtered[p][0] = frame->plane[p] = frame->buffer[p] + frame->i_stride[p] * i_padv + PADH;
            frame->filtered_fld[p][0] = frame->plane_fld[p] = frame->buffer_fld[p] + frame->i_stride[p] * i_padv + PADH;
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        }
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    }
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    frame->b_duplicate = 0;

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    if( b_fdec ) /* fdec frame */
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    {
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        CHECKED_MALLOC( frame->mb_type, i_mb_count * sizeof(int8_t));
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        CHECKED_MALLOC( frame->mb_partition, i_mb_count * sizeof(uint8_t));
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        CHECKED_MALLOC( frame->mv[0], 2*16 * i_mb_count * sizeof(int16_t) );
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        CHECKED_MALLOC( frame->mv16x16, 2*(i_mb_count+1) * sizeof(int16_t) );
        M32( frame->mv16x16[0] ) = 0;
        frame->mv16x16++;
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        CHECKED_MALLOC( frame->ref[0], 4 * i_mb_count * sizeof(int8_t) );
        if( h->param.i_bframe )
        {
            CHECKED_MALLOC( frame->mv[1], 2*16 * i_mb_count * sizeof(int16_t) );
            CHECKED_MALLOC( frame->ref[1], 4 * i_mb_count * sizeof(int8_t) );
        }
        else
        {
            frame->mv[1]  = NULL;
            frame->ref[1] = NULL;
        }
        CHECKED_MALLOC( frame->i_row_bits, i_lines/16 * sizeof(int) );
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        CHECKED_MALLOC( frame->f_row_qp, i_lines/16 * sizeof(float) );
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        CHECKED_MALLOC( frame->f_row_qscale, i_lines/16 * sizeof(float) );
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        if( h->param.analyse.i_me_method >= X264_ME_ESA )
        {
            CHECKED_MALLOC( frame->buffer[3],
                            frame->i_stride[0] * (frame->i_lines[0] + 2*i_padv) * sizeof(uint16_t) << h->frames.b_have_sub8x8_esa );
            frame->integral = (uint16_t*)frame->buffer[3] + frame->i_stride[0] * i_padv + PADH;
        }
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        if( PARAM_INTERLACED )
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            CHECKED_MALLOC( frame->field, i_mb_count * sizeof(uint8_t) );
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    }
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    else /* fenc frame */
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    {
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        if( h->frames.b_have_lowres )
        {
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            int luma_plane_size = align_plane_size( frame->i_stride_lowres * (frame->i_lines[0]/2 + 2*PADV), disalign );
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            CHECKED_MALLOC( frame->buffer_lowres[0], 4 * luma_plane_size * sizeof(pixel) );
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            for( int i = 0; i < 4; i++ )
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                frame->lowres[i] = frame->buffer_lowres[0] + (frame->i_stride_lowres * PADV + PADH) + i * luma_plane_size;
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            for( int j = 0; j <= !!h->param.i_bframe; j++ )
                for( int i = 0; i <= h->param.i_bframe; i++ )
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                {
                    CHECKED_MALLOCZERO( frame->lowres_mvs[j][i], 2*h->mb.i_mb_count*sizeof(int16_t) );
                    CHECKED_MALLOC( frame->lowres_mv_costs[j][i], h->mb.i_mb_count*sizeof(int) );
                }
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            CHECKED_MALLOC( frame->i_propagate_cost, (i_mb_count+7) * sizeof(uint16_t) );
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            for( int j = 0; j <= h->param.i_bframe+1; j++ )
                for( int i = 0; i <= h->param.i_bframe+1; i++ )
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                    CHECKED_MALLOC( frame->lowres_costs[j][i], (i_mb_count+3) * sizeof(uint16_t) );
            frame->i_intra_cost = frame->lowres_costs[0][0];
            memset( frame->i_intra_cost, -1, (i_mb_count+3) * sizeof(uint16_t) );
        }
        if( h->param.rc.i_aq_mode )
        {
            CHECKED_MALLOC( frame->f_qp_offset, h->mb.i_mb_count * sizeof(float) );
            CHECKED_MALLOC( frame->f_qp_offset_aq, h->mb.i_mb_count * sizeof(float) );
            if( h->frames.b_have_lowres )
                /* shouldn't really be initialized, just silences a valgrind false-positive in x264_mbtree_propagate_cost_sse2 */
                CHECKED_MALLOCZERO( frame->i_inv_qscale_factor, (h->mb.i_mb_count+3) * sizeof(uint16_t) );
        }
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    }
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    if( x264_pthread_mutex_init( &frame->mutex, NULL ) )
        goto fail;
    if( x264_pthread_cond_init( &frame->cv, NULL ) )
        goto fail;
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    return frame;
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fail:
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    x264_free( frame );
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    return NULL;
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}

void x264_frame_delete( x264_frame_t *frame )
{
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    /* Duplicate frames are blank copies of real frames (including pointers),
     * so freeing those pointers would cause a double free later. */
    if( !frame->b_duplicate )
    {
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        for( int i = 0; i < 4; i++ )
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        {
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            x264_free( frame->buffer[i] );
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            x264_free( frame->buffer_fld[i] );
        }
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        for( int i = 0; i < 4; i++ )
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            x264_free( frame->buffer_lowres[i] );
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        for( int i = 0; i < X264_BFRAME_MAX+2; i++ )
            for( int j = 0; j < X264_BFRAME_MAX+2; j++ )
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                x264_free( frame->i_row_satds[i][j] );
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        for( int j = 0; j < 2; j++ )
            for( int i = 0; i <= X264_BFRAME_MAX; i++ )
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            {
                x264_free( frame->lowres_mvs[j][i] );
                x264_free( frame->lowres_mv_costs[j][i] );
            }
        x264_free( frame->i_propagate_cost );
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        for( int j = 0; j <= X264_BFRAME_MAX+1; j++ )
            for( int i = 0; i <= X264_BFRAME_MAX+1; i++ )
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                x264_free( frame->lowres_costs[j][i] );
        x264_free( frame->f_qp_offset );
        x264_free( frame->f_qp_offset_aq );
        x264_free( frame->i_inv_qscale_factor );
        x264_free( frame->i_row_bits );
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        x264_free( frame->f_row_qp );
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        x264_free( frame->f_row_qscale );
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        x264_free( frame->field );
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        x264_free( frame->mb_type );
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        x264_free( frame->mb_partition );
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        x264_free( frame->mv[0] );
        x264_free( frame->mv[1] );
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        if( frame->mv16x16 )
            x264_free( frame->mv16x16-1 );
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        x264_free( frame->ref[0] );
        x264_free( frame->ref[1] );
        x264_pthread_mutex_destroy( &frame->mutex );
        x264_pthread_cond_destroy( &frame->cv );
    }
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    x264_free( frame );
}

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static int get_plane_ptr( x264_t *h, x264_picture_t *src, uint8_t **pix, int *stride, int plane, int xshift, int yshift )
{
    int width = h->param.i_width >> xshift;
    int height = h->param.i_height >> yshift;
    *pix = src->img.plane[plane];
    *stride = src->img.i_stride[plane];
    if( src->img.i_csp & X264_CSP_VFLIP )
    {
        *pix += (height-1) * *stride;
        *stride = -*stride;
    }
    if( width > abs(*stride) )
    {
        x264_log( h, X264_LOG_ERROR, "Input picture width (%d) is greater than stride (%d)\n", width, *stride );
        return -1;
    }
    return 0;
}

#define get_plane_ptr(...) do{ if( get_plane_ptr(__VA_ARGS__) < 0 ) return -1; }while(0)

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int x264_frame_copy_picture( x264_t *h, x264_frame_t *dst, x264_picture_t *src )
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{
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    int i_csp = src->img.i_csp & X264_CSP_MASK;
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    if( i_csp <= X264_CSP_NONE || i_csp >= X264_CSP_MAX )
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    {
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        x264_log( h, X264_LOG_ERROR, "Invalid input colorspace\n" );
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        return -1;
    }

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#if HIGH_BIT_DEPTH
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    if( !(src->img.i_csp & X264_CSP_HIGH_DEPTH) )
    {
        x264_log( h, X264_LOG_ERROR, "This build of x264 requires high depth input. Rebuild to support 8-bit input.\n" );
        return -1;
    }
#else
    if( src->img.i_csp & X264_CSP_HIGH_DEPTH )
    {
        x264_log( h, X264_LOG_ERROR, "This build of x264 requires 8-bit input. Rebuild to support high depth input.\n" );
        return -1;
    }
#endif

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    dst->i_type     = src->i_type;
    dst->i_qpplus1  = src->i_qpplus1;
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    dst->i_pts      = dst->i_reordered_pts = src->i_pts;
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    dst->param      = src->param;
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    dst->i_pic_struct = src->i_pic_struct;
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    dst->extra_sei  = src->extra_sei;
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    uint8_t *pix[3];
    int stride[3];
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    if ( i_csp >= X264_CSP_BGR )
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         stride[0] = src->img.i_stride[0];
         pix[0] = src->img.plane[0];
         if( src->img.i_csp & X264_CSP_VFLIP )
         {
             pix[0] += (h->param.i_height-1) * stride[0];
             stride[0] = -stride[0];
         }
         int b = i_csp==X264_CSP_RGB ? 2 : 0;
         h->mc.plane_copy_deinterleave_rgb( dst->plane[1], dst->i_stride[1],
                                            dst->plane[b], dst->i_stride[b],
                                            dst->plane[2-b], dst->i_stride[2-b],
                                            (pixel*)pix[0], stride[0]/sizeof(pixel), i_csp==X264_CSP_BGRA ? 4 : 3, h->param.i_width, h->param.i_height );
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    }
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    else
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    {
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        get_plane_ptr( h, src, &pix[0], &stride[0], 0, 0, 0 );
        h->mc.plane_copy( dst->plane[0], dst->i_stride[0], (pixel*)pix[0],
                          stride[0]/sizeof(pixel), h->param.i_width, h->param.i_height );
        if( i_csp == X264_CSP_NV12 )
        {
            get_plane_ptr( h, src, &pix[1], &stride[1], 1, 0, 1 );
            h->mc.plane_copy( dst->plane[1], dst->i_stride[1], (pixel*)pix[1],
                              stride[1]/sizeof(pixel), h->param.i_width, h->param.i_height>>1 );
        }
        else if( i_csp == X264_CSP_I420 || i_csp == X264_CSP_YV12 )
        {
            get_plane_ptr( h, src, &pix[1], &stride[1], i_csp==X264_CSP_I420 ? 1 : 2, 1, 1 );
            get_plane_ptr( h, src, &pix[2], &stride[2], i_csp==X264_CSP_I420 ? 2 : 1, 1, 1 );
            h->mc.plane_copy_interleave( dst->plane[1], dst->i_stride[1],
                                         (pixel*)pix[1], stride[1]/sizeof(pixel),
                                         (pixel*)pix[2], stride[2]/sizeof(pixel),
                                         h->param.i_width>>1, h->param.i_height>>1 );
        }
        else //if( i_csp == X264_CSP_I444 || i_csp == X264_CSP_YV24 )
        {
            get_plane_ptr( h, src, &pix[1], &stride[1], i_csp==X264_CSP_I444 ? 1 : 2, 0, 0 );
            get_plane_ptr( h, src, &pix[2], &stride[2], i_csp==X264_CSP_I444 ? 2 : 1, 0, 0 );
            h->mc.plane_copy( dst->plane[1], dst->i_stride[1], (pixel*)pix[1],
                              stride[1]/sizeof(pixel), h->param.i_width, h->param.i_height );
            h->mc.plane_copy( dst->plane[2], dst->i_stride[2], (pixel*)pix[2],
                              stride[2]/sizeof(pixel), h->param.i_width, h->param.i_height );
        }
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    }
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    return 0;
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}

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static void ALWAYS_INLINE pixel_memset( pixel *dst, pixel *src, int len, int size )
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{
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    uint8_t *dstp = (uint8_t*)dst;
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    uint8_t  v1 = *src;
    uint16_t v2 = size == 1 ? v1 + (v1 <<  8) : M16( src );
    uint32_t v4 = size <= 2 ? v2 + (v2 << 16) : M32( src );
    int i = 0;
    len *= size;

    /* Align the input pointer if it isn't already */
    if( (intptr_t)dstp & (WORD_SIZE - 1) )
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    {
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        if( size <= 2 && ((intptr_t)dstp & 3) )
        {
            if( size == 1 && ((intptr_t)dstp & 1) )
                dstp[i++] = v1;
            if( (intptr_t)dstp & 2 )
            {
                M16( dstp+i ) = v2;
                i += 2;
            }
        }
        if( WORD_SIZE == 8 && (intptr_t)dstp & 4 )
        {
            M32( dstp+i ) = v4;
            i += 4;
        }
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    }
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    /* Main copy loop */
    if( WORD_SIZE == 8 )
    {
        uint64_t v8 = v4 + ((uint64_t)v4<<32);
        for( ; i < len - 7; i+=8 )
            M64( dstp+i ) = v8;
    }
    for( ; i < len - 3; i+=4 )
        M32( dstp+i ) = v4;

    /* Finish up the last few bytes */
    if( size <= 2 )
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    {
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        if( i < len - 1 )
        {
            M16( dstp+i ) = v2;
            i += 2;
        }
        if( size == 1 && i != len )
            dstp[i] = v1;
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    }
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}
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static void ALWAYS_INLINE plane_expand_border( pixel *pix, int i_stride, int i_width, int i_height, int i_padh, int i_padv, int b_pad_top, int b_pad_bottom, int b_chroma )
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{
#define PPIXEL(x, y) ( pix + (x) + (y)*i_stride )
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    for( int y = 0; y < i_height; y++ )
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    {
        /* left band */
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        pixel_memset( PPIXEL(-i_padh, y), PPIXEL(0, y), i_padh>>b_chroma, sizeof(pixel)<<b_chroma );
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        /* right band */
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        pixel_memset( PPIXEL(i_width, y), PPIXEL(i_width-1-b_chroma, y), i_padh>>b_chroma, sizeof(pixel)<<b_chroma );
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    }
    /* upper band */
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    if( b_pad_top )
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        for( int y = 0; y < i_padv; y++ )
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            memcpy( PPIXEL(-i_padh, -y-1), PPIXEL(-i_padh, 0), (i_width+2*i_padh) * sizeof(pixel) );
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    /* lower band */
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    if( b_pad_bottom )
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        for( int y = 0; y < i_padv; y++ )
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            memcpy( PPIXEL(-i_padh, i_height+y), PPIXEL(-i_padh, i_height-1), (i_width+2*i_padh) * sizeof(pixel) );
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#undef PPIXEL
}

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void x264_frame_expand_border( x264_t *h, x264_frame_t *frame, int mb_y, int b_end )
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{
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    int b_start = !mb_y;
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    if( mb_y & SLICE_MBAFF )
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        return;
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    for( int i = 0; i < frame->i_plane; i++ )
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    {
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        int shift = i && !CHROMA444;
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        int stride = frame->i_stride[i];
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        int width = 16*h->mb.i_mb_width;
        int height = (b_end ? 16*(h->mb.i_mb_height - mb_y) >> SLICE_MBAFF : 16) >> shift;
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        int padh = PADH;
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        int padv = PADV >> shift;
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        // buffer: 2 chroma, 3 luma (rounded to 4) because deblocking goes beyond the top of the mb
        if( b_end && !b_start )
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            height += 4 >> (shift + SLICE_MBAFF);
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        pixel *pix;
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        if( SLICE_MBAFF )
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        {
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            // border samples for each field are extended separately
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            pix = frame->plane_fld[i] + X264_MAX(0, (16*mb_y-4)*stride >> shift);
            plane_expand_border( pix, stride*2, width, height, padh, padv, b_start, b_end, shift );
            plane_expand_border( pix+stride, stride*2, width, height, padh, padv, b_start, b_end, shift );
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            height = (b_end ? 16*(h->mb.i_mb_height - mb_y) : 32) >> shift;
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            if( b_end && !b_start )
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                height += 4 >> shift;
            pix = frame->plane[i] + X264_MAX(0, (16*mb_y-4)*stride >> shift);
            plane_expand_border( pix, stride, width, height, padh, padv, b_start, b_end, shift );
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        }
        else
        {
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            pix = frame->plane[i] + X264_MAX(0, (16*mb_y-4)*stride >> shift);
            plane_expand_border( pix, stride, width, height, padh, padv, b_start, b_end, shift );
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        }
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    }
}

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void x264_frame_expand_border_filtered( x264_t *h, x264_frame_t *frame, int mb_y, int b_end )
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{
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    /* during filtering, 8 extra pixels were filtered on each edge,
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     * but up to 3 of the horizontal ones may be wrong.
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       we want to expand border from the last filtered pixel */
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    int b_start = !mb_y;
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    int width = 16*h->mb.i_mb_width + 8;
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    int height = b_end ? (16*(h->mb.i_mb_height - mb_y) >> SLICE_MBAFF) + 16 : 16;
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    int padh = PADH - 4;
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    int padv = PADV - 8;
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    for( int p = 0; p < (CHROMA444 ? 3 : 1); p++ )
        for( int i = 1; i < 4; i++ )
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        {
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            int stride = frame->i_stride[p];
            // buffer: 8 luma, to match the hpel filter
            pixel *pix;
            if( SLICE_MBAFF )
            {
                pix = frame->filtered_fld[p][i] + (16*mb_y - 16) * stride - 4;
                plane_expand_border( pix, stride*2, width, height, padh, padv, b_start, b_end, 0 );
                plane_expand_border( pix+stride, stride*2, width, height, padh, padv, b_start, b_end, 0 );
            }
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            pix = frame->filtered[p][i] + (16*mb_y - 8) * stride - 4;
            plane_expand_border( pix, stride, width, height << SLICE_MBAFF, padh, padv, b_start, b_end, 0 );
        }
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}

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void x264_frame_expand_border_lowres( x264_frame_t *frame )
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{
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    for( int i = 0; i < 4; i++ )
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        plane_expand_border( frame->lowres[i], frame->i_stride_lowres, frame->i_width_lowres, frame->i_lines_lowres, PADH, PADV, 1, 1, 0 );
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}

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void x264_frame_expand_border_chroma( x264_t *h, x264_frame_t *frame, int plane )
{
    int shift = !CHROMA444;
    plane_expand_border( frame->plane[plane], frame->i_stride[plane], 16*h->mb.i_mb_width, 16*h->mb.i_mb_height>>shift,
                         PADH, PADV>>shift, 1, 1, shift );
}

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void x264_frame_expand_border_mod16( x264_t *h, x264_frame_t *frame )
{
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    for( int i = 0; i < frame->i_plane; i++ )
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    {
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        int i_width = h->param.i_width;
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        int shift = i && !CHROMA444;
        int i_height = h->param.i_height >> shift;
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        int i_padx = (h->mb.i_mb_width * 16 - h->param.i_width);
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        int i_pady = (h->mb.i_mb_height * 16 - h->param.i_height) >> shift;
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        if( i_padx )
        {
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            for( int y = 0; y < i_height; y++ )
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                pixel_memset( &frame->plane[i][y*frame->i_stride[i] + i_width],
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                              &frame->plane[i][y*frame->i_stride[i] + i_width - 1-shift],
                              i_padx>>shift, sizeof(pixel)<<shift );
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        }
        if( i_pady )
        {
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            for( int y = i_height; y < i_height + i_pady; y++ )
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                memcpy( &frame->plane[i][y*frame->i_stride[i]],
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                        &frame->plane[i][(i_height-(~y&PARAM_INTERLACED)-1)*frame->i_stride[i]],
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                        (i_width + i_padx) * sizeof(pixel) );
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        }
    }
}

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void x264_expand_border_mbpair( x264_t *h, int mb_x, int mb_y )
{
    for( int i = 0; i < h->fenc->i_plane; i++ )
    {
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        int shift = i && !CHROMA444;
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        int stride = h->fenc->i_stride[i];
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        int height = h->param.i_height >> shift;
        int pady = (h->mb.i_mb_height * 16 - h->param.i_height) >> shift;
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        pixel *fenc = h->fenc->plane[i] + 16*mb_x;
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        for( int y = height; y < height + pady; y++ )
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            memcpy( fenc + y*stride, fenc + (height-1)*stride, 16*sizeof(pixel) );
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    }
}

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/* threading */
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void x264_frame_cond_broadcast( x264_frame_t *frame, int i_lines_completed )
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{
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    x264_pthread_mutex_lock( &frame->mutex );
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    frame->i_lines_completed = i_lines_completed;
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    x264_pthread_cond_broadcast( &frame->cv );
    x264_pthread_mutex_unlock( &frame->mutex );
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}

void x264_frame_cond_wait( x264_frame_t *frame, int i_lines_completed )
{
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    x264_pthread_mutex_lock( &frame->mutex );
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    while( frame->i_lines_completed < i_lines_completed )
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        x264_pthread_cond_wait( &frame->cv, &frame->mutex );
    x264_pthread_mutex_unlock( &frame->mutex );
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}

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/* list operators */

void x264_frame_push( x264_frame_t **list, x264_frame_t *frame )
{
    int i = 0;
    while( list[i] ) i++;
    list[i] = frame;
}

x264_frame_t *x264_frame_pop( x264_frame_t **list )
{
    x264_frame_t *frame;
    int i = 0;
    assert( list[0] );
    while( list[i+1] ) i++;
    frame = list[i];
    list[i] = NULL;
    return frame;
}

void x264_frame_unshift( x264_frame_t **list, x264_frame_t *frame )
{
    int i = 0;
    while( list[i] ) i++;
    while( i-- )
        list[i+1] = list[i];
    list[0] = frame;
}

x264_frame_t *x264_frame_shift( x264_frame_t **list )
{
    x264_frame_t *frame = list[0];
    int i;
    for( i = 0; list[i]; i++ )
        list[i] = list[i+1];
    assert(frame);
    return frame;
}

void x264_frame_push_unused( x264_t *h, x264_frame_t *frame )
{
    assert( frame->i_reference_count > 0 );
    frame->i_reference_count--;
    if( frame->i_reference_count == 0 )
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        x264_frame_push( h->frames.unused[frame->b_fdec], frame );
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}

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x264_frame_t *x264_frame_pop_unused( x264_t *h, int b_fdec )
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{
    x264_frame_t *frame;
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    if( h->frames.unused[b_fdec][0] )
        frame = x264_frame_pop( h->frames.unused[b_fdec] );
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    else
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        frame = x264_frame_new( h, b_fdec );
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    if( !frame )
        return NULL;
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    frame->b_last_minigop_bframe = 0;
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    frame->i_reference_count = 1;
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    frame->b_intra_calculated = 0;
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    frame->b_scenecut = 1;
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    frame->b_keyframe = 0;
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    frame->b_corrupt = 0;
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    memset( frame->weight, 0, sizeof(frame->weight) );
    memset( frame->f_weighted_cost_delta, 0, sizeof(frame->f_weighted_cost_delta) );

    return frame;
}

void x264_frame_push_blank_unused( x264_t *h, x264_frame_t *frame )
{
    assert( frame->i_reference_count > 0 );
    frame->i_reference_count--;
    if( frame->i_reference_count == 0 )
        x264_frame_push( h->frames.blank_unused, frame );
}

x264_frame_t *x264_frame_pop_blank_unused( x264_t *h )
{
    x264_frame_t *frame;
    if( h->frames.blank_unused[0] )
        frame = x264_frame_pop( h->frames.blank_unused );
    else
        frame = x264_malloc( sizeof(x264_frame_t) );
    if( !frame )
        return NULL;
    frame->b_duplicate = 1;
    frame->i_reference_count = 1;
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    return frame;
}

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void x264_weight_scale_plane( x264_t *h, pixel *dst, int i_dst_stride, pixel *src, int i_src_stride,
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                         int i_width, int i_height, x264_weight_t *w )
{
    /* Weight horizontal strips of height 16. This was found to be the optimal height
     * in terms of the cache loads. */
    while( i_height > 0 )
    {
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        for( int x = 0; x < i_width; x += 16 )
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            w->weightfn[16>>2]( dst+x, i_dst_stride, src+x, i_src_stride, w, X264_MIN( i_height, 16 ) );
        i_height -= 16;
        dst += 16 * i_dst_stride;
        src += 16 * i_src_stride;
    }
}

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void x264_frame_delete_list( x264_frame_t **list )
{
    int i = 0;
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    if( !list )
        return;
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    while( list[i] )
        x264_frame_delete( list[i++] );
    x264_free( list );
}

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int x264_sync_frame_list_init( x264_sync_frame_list_t *slist, int max_size )
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{
    if( max_size < 0 )
        return -1;
    slist->i_max_size = max_size;
    slist->i_size = 0;
    CHECKED_MALLOCZERO( slist->list, (max_size+1) * sizeof(x264_frame_t*) );
    if( x264_pthread_mutex_init( &slist->mutex, NULL ) ||
        x264_pthread_cond_init( &slist->cv_fill, NULL ) ||
        x264_pthread_cond_init( &slist->cv_empty, NULL ) )
        return -1;
    return 0;
fail:
    return -1;
}

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void x264_sync_frame_list_delete( x264_sync_frame_list_t *slist )
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{
    x264_pthread_mutex_destroy( &slist->mutex );
    x264_pthread_cond_destroy( &slist->cv_fill );
    x264_pthread_cond_destroy( &slist->cv_empty );
    x264_frame_delete_list( slist->list );
}

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void x264_sync_frame_list_push( x264_sync_frame_list_t *slist, x264_frame_t *frame )
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{
    x264_pthread_mutex_lock( &slist->mutex );
    while( slist->i_size == slist->i_max_size )
        x264_pthread_cond_wait( &slist->cv_empty, &slist->mutex );
    slist->list[ slist->i_size++ ] = frame;
    x264_pthread_mutex_unlock( &slist->mutex );
    x264_pthread_cond_broadcast( &slist->cv_fill );
}
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x264_frame_t *x264_sync_frame_list_pop( x264_sync_frame_list_t *slist )
{
    x264_frame_t *frame;
    x264_pthread_mutex_lock( &slist->mutex );
    while( !slist->i_size )
        x264_pthread_cond_wait( &slist->cv_fill, &slist->mutex );
    frame = slist->list[ --slist->i_size ];
    slist->list[ slist->i_size ] = NULL;
    x264_pthread_cond_broadcast( &slist->cv_empty );
    x264_pthread_mutex_unlock( &slist->mutex );
    return frame;
}