git.sesse.net Git - x264/blob - common/bitstream.c

   1 /*****************************************************************************
   2  * bitstream.c: bitstream writing
   3  *****************************************************************************
   4  * Copyright (C) 2003-2013 x264 project
   5  *
   6  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   7  *          Fiona Glaser <fiona@x264.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
  22  *
  23  * This program is also available under a commercial proprietary license.
  24  * For more information, contact us at licensing@x264.com.
  25  *****************************************************************************/
  26
  27 #include "common.h"
  28
  29 static uint8_t *x264_nal_escape_c( uint8_t *dst, uint8_t *src, uint8_t *end )
  30 {
  31     if( src < end ) *dst++ = *src++;
  32     if( src < end ) *dst++ = *src++;
  33     while( src < end )
  34     {
  35         if( src[0] <= 0x03 && !dst[-2] && !dst[-1] )
  36             *dst++ = 0x03;
  37         *dst++ = *src++;
  38     }
  39     return dst;
  40 }
  41
  42 uint8_t *x264_nal_escape_mmx2( uint8_t *dst, uint8_t *src, uint8_t *end );
  43 uint8_t *x264_nal_escape_sse2( uint8_t *dst, uint8_t *src, uint8_t *end );
  44 uint8_t *x264_nal_escape_avx( uint8_t *dst, uint8_t *src, uint8_t *end );
  45 void x264_cabac_block_residual_rd_internal_sse2       ( dctcoef *l, int b_interlaced, intptr_t ctx_block_cat, x264_cabac_t *cb );
  46 void x264_cabac_block_residual_rd_internal_sse2_lzcnt ( dctcoef *l, int b_interlaced, intptr_t ctx_block_cat, x264_cabac_t *cb );
  47 void x264_cabac_block_residual_rd_internal_ssse3      ( dctcoef *l, int b_interlaced, intptr_t ctx_block_cat, x264_cabac_t *cb );
  48 void x264_cabac_block_residual_rd_internal_ssse3_lzcnt( dctcoef *l, int b_interlaced, intptr_t ctx_block_cat, x264_cabac_t *cb );
  49 void x264_cabac_block_residual_8x8_rd_internal_sse2       ( dctcoef *l, int b_interlaced, intptr_t ctx_block_cat, x264_cabac_t *cb );
  50 void x264_cabac_block_residual_8x8_rd_internal_sse2_lzcnt ( dctcoef *l, int b_interlaced, intptr_t ctx_block_cat, x264_cabac_t *cb );
  51 void x264_cabac_block_residual_8x8_rd_internal_ssse3      ( dctcoef *l, int b_interlaced, intptr_t ctx_block_cat, x264_cabac_t *cb );
  52 void x264_cabac_block_residual_8x8_rd_internal_ssse3_lzcnt( dctcoef *l, int b_interlaced, intptr_t ctx_block_cat, x264_cabac_t *cb );
  53 void x264_cabac_block_residual_internal_sse2       ( dctcoef *l, int b_interlaced, intptr_t ctx_block_cat, x264_cabac_t *cb );
  54 void x264_cabac_block_residual_internal_sse2_lzcnt ( dctcoef *l, int b_interlaced, intptr_t ctx_block_cat, x264_cabac_t *cb );
  55
  56 /****************************************************************************
  57  * x264_nal_encode:
  58  ****************************************************************************/
  59 void x264_nal_encode( x264_t *h, uint8_t *dst, x264_nal_t *nal )
  60 {
  61     uint8_t *src = nal->p_payload;
  62     uint8_t *end = nal->p_payload + nal->i_payload;
  63     uint8_t *orig_dst = dst;
  64
  65     if( h->param.b_annexb )
  66     {
  67         if( nal->b_long_startcode )
  68             *dst++ = 0x00;
  69         *dst++ = 0x00;
  70         *dst++ = 0x00;
  71         *dst++ = 0x01;
  72     }
  73     else /* save room for size later */
  74         dst += 4;
  75
  76     /* nal header */
  77     *dst++ = ( 0x00 << 7 ) | ( nal->i_ref_idc << 5 ) | nal->i_type;
  78
  79     dst = h->bsf.nal_escape( dst, src, end );
  80     int size = (dst - orig_dst) - 4;
  81
  82     /* Write the size header for mp4/etc */
  83     if( !h->param.b_annexb )
  84     {
  85         /* Size doesn't include the size of the header we're writing now. */
  86         orig_dst[0] = size>>24;
  87         orig_dst[1] = size>>16;
  88         orig_dst[2] = size>> 8;
  89         orig_dst[3] = size>> 0;
  90     }
  91
  92     nal->i_payload = size+4;
  93     nal->p_payload = orig_dst;
  94     x264_emms();
  95 }
  96
  97 void x264_bitstream_init( int cpu, x264_bitstream_function_t *pf )
  98 {
  99     memset( pf, 0, sizeof(*pf) );
 100
 101     pf->nal_escape = x264_nal_escape_c;
 102 #if HAVE_MMX
 103 #if ARCH_X86_64
 104     pf->cabac_block_residual_internal = x264_cabac_block_residual_internal_sse2;
 105     pf->cabac_block_residual_rd_internal = x264_cabac_block_residual_rd_internal_sse2;
 106     pf->cabac_block_residual_8x8_rd_internal = x264_cabac_block_residual_8x8_rd_internal_sse2;
 107 #endif
 108
 109     if( cpu&X264_CPU_MMX2 )
 110         pf->nal_escape = x264_nal_escape_mmx2;
 111     if( cpu&X264_CPU_SSE2 )
 112     {
 113 #if ARCH_X86_64
 114         if( cpu&X264_CPU_LZCNT )
 115         {
 116             pf->cabac_block_residual_internal = x264_cabac_block_residual_internal_sse2_lzcnt;
 117             pf->cabac_block_residual_rd_internal = x264_cabac_block_residual_rd_internal_sse2_lzcnt;
 118             pf->cabac_block_residual_8x8_rd_internal = x264_cabac_block_residual_8x8_rd_internal_sse2_lzcnt;
 119         }
 120 #endif
 121         if( cpu&X264_CPU_SSE2_IS_FAST )
 122             pf->nal_escape = x264_nal_escape_sse2;
 123     }
 124 #if ARCH_X86_64
 125     if( cpu&X264_CPU_SSSE3 )
 126     {
 127         pf->cabac_block_residual_rd_internal = x264_cabac_block_residual_rd_internal_ssse3;
 128         pf->cabac_block_residual_8x8_rd_internal = x264_cabac_block_residual_8x8_rd_internal_ssse3;
 129         if( cpu&X264_CPU_LZCNT )
 130         {
 131             pf->cabac_block_residual_rd_internal = x264_cabac_block_residual_rd_internal_ssse3_lzcnt;
 132             pf->cabac_block_residual_8x8_rd_internal = x264_cabac_block_residual_8x8_rd_internal_ssse3_lzcnt;
 133         }
 134     }
 135 #endif
 136     if( cpu&X264_CPU_AVX )
 137         pf->nal_escape = x264_nal_escape_avx;
 138 #endif
 139 }