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Diffstat (limited to 'gst/mpegpsmux/bits.h')
| -rw-r--r-- | gst/mpegpsmux/bits.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/gst/mpegpsmux/bits.h b/gst/mpegpsmux/bits.h new file mode 100644 index 000000000..b2ff74602 --- /dev/null +++ b/gst/mpegpsmux/bits.h @@ -0,0 +1,95 @@ +/***************************************************************************** + * bits.h + ***************************************************************************** + * Copyright (C) 2001, 2002 the VideoLAN team + * $Id$ + * + * Authors: Laurent Aimar <fenrir@via.ecp.fr> + * Eric Petit <titer@videolan.org> + * + * Copyright (C) 2008 Lin YANG <oxcsnicho@gmail.com> + * + * 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 + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. + *****************************************************************************/ + +#ifndef __BITS_H__ +#define __BITS_H__ + +#include <glib.h> + +G_BEGIN_DECLS +typedef struct bits_buffer_s +{ + gint i_size; + + gint i_data; + guint8 i_mask; + guint8* p_data; + +} bits_buffer_t; + +static inline gint bits_initwrite( bits_buffer_t *p_buffer, + gint i_size, void *p_data ) +{ + p_buffer->i_size = i_size; + p_buffer->i_data = 0; + p_buffer->i_mask = 0x80; + p_buffer->p_data = p_data; + if( !p_buffer->p_data ) + { + if( !( p_buffer->p_data = g_slice_alloc0( i_size ) ) ) + return -1; + } + p_buffer->p_data[0] = 0; + return 0; +} + +static inline void bits_align( bits_buffer_t *p_buffer ) +{ + if( p_buffer->i_mask != 0x80 && p_buffer->i_data < p_buffer->i_size ) + { + p_buffer->i_mask = 0x80; + p_buffer->i_data++; + p_buffer->p_data[p_buffer->i_data] = 0x00; + } +} + +static inline void bits_write( bits_buffer_t *p_buffer, + gint i_count, guint64 i_bits ) +{ + while( i_count > 0 ) + { + i_count--; + + if( ( i_bits >> i_count )&0x01 ) + { + p_buffer->p_data[p_buffer->i_data] |= p_buffer->i_mask; + } + else + { + p_buffer->p_data[p_buffer->i_data] &= ~p_buffer->i_mask; + } + p_buffer->i_mask >>= 1; + if( p_buffer->i_mask == 0 ) + { + p_buffer->i_data++; + p_buffer->i_mask = 0x80; + } + } +} + +G_END_DECLS + +#endif |