1 /*****************************************************************************
2 * bitstream.c: bitstream writing
3 *****************************************************************************
4 * Copyright (C) 2003-2015 x264 project
6 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
7 * Fiona Glaser <fiona@x264.com>
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.
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.
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.
23 * This program is also available under a commercial proprietary license.
24 * For more information, contact us at licensing@x264.com.
25 *****************************************************************************/
29 static uint8_t *x264_nal_escape_c( uint8_t *dst, uint8_t *src, uint8_t *end )
31 if( src < end ) *dst++ = *src++;
32 if( src < end ) *dst++ = *src++;
35 if( src[0] <= 0x03 && !dst[-2] && !dst[-1] )
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_avx2( 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 void x264_cabac_block_residual_internal_avx2_bmi2 ( dctcoef *l, int b_interlaced, intptr_t ctx_block_cat, x264_cabac_t *cb );
57 uint8_t *x264_nal_escape_neon( uint8_t *dst, uint8_t *src, uint8_t *end );
59 /****************************************************************************
61 ****************************************************************************/
62 void x264_nal_encode( x264_t *h, uint8_t *dst, x264_nal_t *nal )
64 uint8_t *src = nal->p_payload;
65 uint8_t *end = nal->p_payload + nal->i_payload;
66 uint8_t *orig_dst = dst;
68 if( h->param.b_annexb )
70 if( nal->b_long_startcode )
76 else /* save room for size later */
80 *dst++ = ( 0x00 << 7 ) | ( nal->i_ref_idc << 5 ) | nal->i_type;
82 dst = h->bsf.nal_escape( dst, src, end );
83 int size = (dst - orig_dst) - 4;
85 /* Write the size header for mp4/etc */
86 if( !h->param.b_annexb )
88 /* Size doesn't include the size of the header we're writing now. */
89 orig_dst[0] = size>>24;
90 orig_dst[1] = size>>16;
91 orig_dst[2] = size>> 8;
92 orig_dst[3] = size>> 0;
95 nal->i_payload = size+4;
96 nal->p_payload = orig_dst;
100 void x264_bitstream_init( int cpu, x264_bitstream_function_t *pf )
102 memset( pf, 0, sizeof(*pf) );
104 pf->nal_escape = x264_nal_escape_c;
107 pf->cabac_block_residual_internal = x264_cabac_block_residual_internal_sse2;
108 pf->cabac_block_residual_rd_internal = x264_cabac_block_residual_rd_internal_sse2;
109 pf->cabac_block_residual_8x8_rd_internal = x264_cabac_block_residual_8x8_rd_internal_sse2;
112 if( cpu&X264_CPU_MMX2 )
113 pf->nal_escape = x264_nal_escape_mmx2;
114 if( cpu&X264_CPU_SSE2 )
117 if( cpu&X264_CPU_LZCNT )
119 pf->cabac_block_residual_internal = x264_cabac_block_residual_internal_sse2_lzcnt;
120 pf->cabac_block_residual_rd_internal = x264_cabac_block_residual_rd_internal_sse2_lzcnt;
121 pf->cabac_block_residual_8x8_rd_internal = x264_cabac_block_residual_8x8_rd_internal_sse2_lzcnt;
124 if( cpu&X264_CPU_SSE2_IS_FAST )
125 pf->nal_escape = x264_nal_escape_sse2;
128 if( cpu&X264_CPU_SSSE3 )
130 pf->cabac_block_residual_rd_internal = x264_cabac_block_residual_rd_internal_ssse3;
131 pf->cabac_block_residual_8x8_rd_internal = x264_cabac_block_residual_8x8_rd_internal_ssse3;
132 if( cpu&X264_CPU_LZCNT )
134 pf->cabac_block_residual_rd_internal = x264_cabac_block_residual_rd_internal_ssse3_lzcnt;
135 pf->cabac_block_residual_8x8_rd_internal = x264_cabac_block_residual_8x8_rd_internal_ssse3_lzcnt;
139 if( cpu&X264_CPU_AVX2 )
141 pf->nal_escape = x264_nal_escape_avx2;
142 if( cpu&X264_CPU_BMI2 )
143 pf->cabac_block_residual_internal = x264_cabac_block_residual_internal_avx2_bmi2;
148 if( cpu&X264_CPU_NEON )
149 pf->nal_escape = x264_nal_escape_neon;
152 if( cpu&X264_CPU_NEON )
153 pf->nal_escape = x264_nal_escape_neon;