1 /*****************************************************************************
2 * es_format.c : es_format_t helpers.
3 *****************************************************************************
4 * Copyright (C) 2008 the VideoLAN team
7 * Author: Laurent Aimar <fenrir@videolan.org>
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 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
36 /*****************************************************************************
37 * BinaryLog: computes the base 2 log of a binary value
38 *****************************************************************************
39 * This functions is used by MaskToShift, to get a bit index from a binary
41 *****************************************************************************/
42 static int BinaryLog( uint32_t i )
46 if( i == 0 ) return -31337;
48 if( i & 0xffff0000 ) i_log += 16;
49 if( i & 0xff00ff00 ) i_log += 8;
50 if( i & 0xf0f0f0f0 ) i_log += 4;
51 if( i & 0xcccccccc ) i_log += 2;
52 if( i & 0xaaaaaaaa ) i_log += 1;
58 * It transforms a color mask into right and left shifts
59 * FIXME copied from video_output.c
61 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
63 uint32_t i_low, i_high; /* lower and higher bits of the mask */
67 *pi_left = *pi_right = 0;
72 i_low = i_high = i_mask;
74 i_low &= - (int32_t)i_low; /* lower bit of the mask */
75 i_high += i_low; /* higher bit of the mask */
77 /* Transform bits into an index. Also deal with i_high overflow, which
78 * is faster than changing the BinaryLog code to handle 64 bit integers. */
79 i_low = BinaryLog (i_low);
80 i_high = i_high ? BinaryLog (i_high) : 32;
82 /* Update pointers and return */
84 *pi_right = (8 - i_high + i_low);
88 void video_format_FixRgb( video_format_t *p_fmt )
90 /* FIXME find right default mask */
91 if( !p_fmt->i_rmask || !p_fmt->i_gmask || !p_fmt->i_bmask )
93 switch( p_fmt->i_chroma )
95 case VLC_FOURCC('R','V','1','5'):
96 p_fmt->i_rmask = 0x7c00;
97 p_fmt->i_gmask = 0x03e0;
98 p_fmt->i_bmask = 0x001f;
101 case VLC_FOURCC('R','V','1','6'):
102 p_fmt->i_rmask = 0xf800;
103 p_fmt->i_gmask = 0x07e0;
104 p_fmt->i_bmask = 0x001f;
107 case VLC_FOURCC('R','V','2','4'):
108 p_fmt->i_rmask = 0xff0000;
109 p_fmt->i_gmask = 0x00ff00;
110 p_fmt->i_bmask = 0x0000ff;
112 case VLC_FOURCC('R','V','3','2'):
113 p_fmt->i_rmask = 0x00ff0000;
114 p_fmt->i_gmask = 0x0000ff00;
115 p_fmt->i_bmask = 0x000000ff;
123 MaskToShift( &p_fmt->i_lrshift, &p_fmt->i_rrshift,
125 MaskToShift( &p_fmt->i_lgshift, &p_fmt->i_rgshift,
127 MaskToShift( &p_fmt->i_lbshift, &p_fmt->i_rbshift,
131 void es_format_Init( es_format_t *fmt,
132 int i_cat, vlc_fourcc_t i_codec )
135 fmt->i_codec = i_codec;
139 fmt->psz_language = NULL;
140 fmt->psz_description = NULL;
142 fmt->i_extra_languages = 0;
143 fmt->p_extra_languages = NULL;
145 memset( &fmt->audio, 0, sizeof(audio_format_t) );
146 memset( &fmt->audio_replay_gain, 0, sizeof(audio_replay_gain_t) );
147 memset( &fmt->video, 0, sizeof(video_format_t) );
148 memset( &fmt->subs, 0, sizeof(subs_format_t) );
150 fmt->b_packetized = true;
156 int es_format_Copy( es_format_t *dst, const es_format_t *src )
159 memcpy( dst, src, sizeof( es_format_t ) );
160 dst->psz_language = src->psz_language ? strdup( src->psz_language ) : NULL;
161 dst->psz_description = src->psz_description ? strdup( src->psz_description ) : NULL;
162 if( src->i_extra > 0 && dst->p_extra )
164 dst->i_extra = src->i_extra;
165 dst->p_extra = malloc( src->i_extra );
167 memcpy( dst->p_extra, src->p_extra, src->i_extra );
177 dst->subs.psz_encoding = dst->subs.psz_encoding ? strdup( src->subs.psz_encoding ) : NULL;
179 if( src->video.p_palette )
181 dst->video.p_palette =
182 (video_palette_t*)malloc( sizeof( video_palette_t ) );
183 if(dst->video.p_palette)
185 memcpy( dst->video.p_palette, src->video.p_palette,
186 sizeof( video_palette_t ) );
190 if( dst->i_extra_languages && src->p_extra_languages)
192 dst->i_extra_languages = src->i_extra_languages;
193 dst->p_extra_languages = (extra_languages_t*)
194 malloc(dst->i_extra_languages * sizeof(*dst->p_extra_languages ));
195 if( dst->p_extra_languages )
197 for( i = 0; i < dst->i_extra_languages; i++ ) {
198 if( src->p_extra_languages[i].psz_language )
199 dst->p_extra_languages[i].psz_language = strdup( src->p_extra_languages[i].psz_language );
201 dst->p_extra_languages[i].psz_language = NULL;
202 if( src->p_extra_languages[i].psz_description )
203 dst->p_extra_languages[i].psz_description = strdup( src->p_extra_languages[i].psz_description );
205 dst->p_extra_languages[i].psz_description = NULL;
209 dst->i_extra_languages = 0;
212 dst->i_extra_languages = 0;
216 void es_format_Clean( es_format_t *fmt )
218 free( fmt->psz_language );
219 free( fmt->psz_description );
221 if( fmt->i_extra > 0 ) free( fmt->p_extra );
223 free( fmt->video.p_palette );
224 free( fmt->subs.psz_encoding );
226 if( fmt->i_extra_languages > 0 && fmt->p_extra_languages )
229 for( i = 0; i < fmt->i_extra_languages; i++ )
231 free( fmt->p_extra_languages[i].psz_language );
232 free( fmt->p_extra_languages[i].psz_description );
234 free( fmt->p_extra_languages );
237 /* es_format_Clean can be called multiple times */
238 memset( fmt, 0, sizeof(*fmt) );