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Boxes/atoms functions are unrelated to bitstreams.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| /***************************************************************************** | ||
| * vlc_boxes.h : Boxes/Atoms handling helpers | ||
| ***************************************************************************** | ||
| * Copyright (C) 2001, 2002, 2003, 2006, 2015 VLC authors and VideoLAN | ||
| * | ||
| * Authors: Laurent Aimar <[email protected]> | ||
| * Gildas Bazin <gbazin at videolan dot org> | ||
| * Rafaël Carré <funman at videolan dot org> | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser 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 VLC_BOXES_H | ||
| #define VLC_BOXES_H | ||
|
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| #include <vlc_common.h> | ||
| #include <vlc_block.h> | ||
|
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| /** | ||
| * \file | ||
| * This file defines functions, structures for handling boxes/atoms in vlc | ||
| */ | ||
|
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| typedef struct bo_t | ||
| { | ||
| block_t *b; | ||
| size_t basesize; | ||
| } bo_t; | ||
|
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| static inline bool bo_init(bo_t *p_bo, int i_size) | ||
| { | ||
| p_bo->b = block_Alloc(i_size); | ||
| if (p_bo->b == NULL) | ||
| return false; | ||
|
|
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| p_bo->b->i_buffer = 0; | ||
| p_bo->basesize = i_size; | ||
|
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| return true; | ||
| } | ||
|
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| static inline void bo_deinit(bo_t *p_bo) | ||
| { | ||
| if(p_bo->b) | ||
| block_Release(p_bo->b); | ||
| } | ||
|
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| static inline void bo_free(bo_t *p_bo) | ||
| { | ||
| if(!p_bo) | ||
| return; | ||
| bo_deinit(p_bo); | ||
| free(p_bo); | ||
| } | ||
|
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| static inline int bo_extend(bo_t *p_bo, size_t i_total) | ||
| { | ||
| if(!p_bo->b) | ||
| return false; | ||
| const size_t i_size = p_bo->b->i_size - (p_bo->b->p_buffer - p_bo->b->p_start); | ||
| if (i_total >= i_size) | ||
| { | ||
| int i_growth = p_bo->basesize; | ||
| while(i_total >= i_size + i_growth) | ||
| i_growth += p_bo->basesize; | ||
|
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| int i = p_bo->b->i_buffer; /* Realloc would set payload size == buffer size */ | ||
| p_bo->b = block_Realloc(p_bo->b, 0, i_size + i_growth); | ||
| if (!p_bo->b) | ||
| return false; | ||
| p_bo->b->i_buffer = i; | ||
| } | ||
| return true; | ||
| } | ||
|
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| #define BO_SET_DECL_S(func, handler, type) static inline bool func(bo_t *p_bo, size_t i_offset, type val)\ | ||
| {\ | ||
| if (!bo_extend(p_bo, i_offset + sizeof(type)))\ | ||
| return false;\ | ||
| handler(&p_bo->b->p_buffer[i_offset], val);\ | ||
| return true;\ | ||
| } | ||
|
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| #define BO_ADD_DECL_S(func, handler, type) static inline bool func(bo_t *p_bo, type val)\ | ||
| {\ | ||
| if(!p_bo->b || !handler(p_bo, p_bo->b->i_buffer, val))\ | ||
| return false;\ | ||
| p_bo->b->i_buffer += sizeof(type);\ | ||
| return true;\ | ||
| } | ||
|
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| #define BO_FUNC_DECL(suffix, handler, type ) \ | ||
| BO_SET_DECL_S( bo_set_ ## suffix ## be, handler ## BE, type )\ | ||
| BO_SET_DECL_S( bo_set_ ## suffix ## le, handler ## LE, type )\ | ||
| BO_ADD_DECL_S( bo_add_ ## suffix ## be, bo_set_ ## suffix ## be, type )\ | ||
| BO_ADD_DECL_S( bo_add_ ## suffix ## le, bo_set_ ## suffix ## le, type ) | ||
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| static inline bool bo_set_8(bo_t *p_bo, size_t i_offset, uint8_t i) | ||
| { | ||
| if (!bo_extend(p_bo, i_offset + 1)) | ||
| return false; | ||
| p_bo->b->p_buffer[i_offset] = i; | ||
| return true; | ||
| } | ||
|
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| static inline bool bo_add_8(bo_t *p_bo, uint8_t i) | ||
| { | ||
| if(!p_bo->b || !bo_set_8( p_bo, p_bo->b->i_buffer, i )) | ||
| return false; | ||
| p_bo->b->i_buffer++; | ||
| return true; | ||
| } | ||
|
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| /* declares all bo_[set,add]_[16,32,64] */ | ||
| BO_FUNC_DECL( 16, SetW, uint16_t ) | ||
| BO_FUNC_DECL( 32, SetDW, uint32_t ) | ||
| BO_FUNC_DECL( 64, SetQW, uint64_t ) | ||
|
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| #undef BO_FUNC_DECL | ||
| #undef BO_SET_DECL_S | ||
| #undef BO_ADD_DECL_S | ||
|
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| static inline bool bo_add_24be(bo_t *p_bo, uint32_t i) | ||
| { | ||
| if(!p_bo->b || !bo_extend(p_bo, p_bo->b->i_buffer + 3)) | ||
| return false; | ||
| p_bo->b->p_buffer[p_bo->b->i_buffer++] = ((i >> 16) & 0xff); | ||
| p_bo->b->p_buffer[p_bo->b->i_buffer++] = ((i >> 8) & 0xff); | ||
| p_bo->b->p_buffer[p_bo->b->i_buffer++] = (i & 0xff); | ||
| return true; | ||
| } | ||
|
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| static inline void bo_swap_32be (bo_t *p_bo, size_t i_pos, uint32_t i) | ||
| { | ||
| if (!p_bo->b || p_bo->b->i_buffer < i_pos + 4) | ||
| return; | ||
| p_bo->b->p_buffer[i_pos ] = (i >> 24)&0xff; | ||
| p_bo->b->p_buffer[i_pos + 1] = (i >> 16)&0xff; | ||
| p_bo->b->p_buffer[i_pos + 2] = (i >> 8)&0xff; | ||
| p_bo->b->p_buffer[i_pos + 3] = (i )&0xff; | ||
| } | ||
|
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| static inline bool bo_add_mem(bo_t *p_bo, size_t i_size, const void *p_mem) | ||
| { | ||
| if(!p_bo->b || !bo_extend(p_bo, p_bo->b->i_buffer + i_size)) | ||
| return false; | ||
| memcpy(&p_bo->b->p_buffer[p_bo->b->i_buffer], p_mem, i_size); | ||
| p_bo->b->i_buffer += i_size; | ||
| return true; | ||
| } | ||
|
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| #define bo_add_fourcc(p_bo, fcc) bo_add_mem(p_bo, 4, fcc) | ||
|
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| #endif // VLC_BOXES_H |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -20,6 +20,7 @@ | |
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| #include "h264_nal.h" | ||
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| #include <vlc_boxes.h> | ||
| #include <limits.h> | ||
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| /* | ||
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