author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 08:53:32 +0200 | |
changeset 0 | 0e761a78d257 |
permissions | -rw-r--r-- |
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/* |
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* utils for libavcodec |
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* Copyright (c) 2001 Fabrice Bellard. |
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* Copyright (c) 2003 Michel Bardiaux for the av_log API |
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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/** |
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* @file utils.c |
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* utils. |
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*/ |
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|
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#include "avcodec.h" |
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#include "dsputil.h" |
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#include <stdlib.h> |
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#include <string.h> |
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#include <stdarg.h> |
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#include <limits.h> |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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void * |
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av_mallocz (unsigned int size) |
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{ |
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void *ptr; |
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ptr = av_malloc (size); |
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if (!ptr) |
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return NULL; |
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memset (ptr, 0, size); |
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return ptr; |
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} |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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|
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char * |
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av_strdup (const char *s) |
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{ |
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char *ptr; |
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int len; |
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len = strlen (s) + 1; |
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ptr = av_malloc (len); |
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if (!ptr) |
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return NULL; |
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memcpy (ptr, s, len); |
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return ptr; |
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} |
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/** |
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* realloc which does nothing if the block is large enough |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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void * |
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av_fast_realloc (void *ptr, unsigned int *size, unsigned int min_size) |
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{ |
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if (min_size < *size) |
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return ptr; |
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*size = 17 * min_size / 16 + 32; |
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return av_realloc (ptr, *size); |
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} |
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static unsigned int last_static = 0; |
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static unsigned int allocated_static = 0; |
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static void **array_static = NULL; |
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/** |
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* allocation of static arrays - do not use for normal allocation. |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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void * |
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av_mallocz_static (unsigned int size) |
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{ |
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void *ptr = av_mallocz (size); |
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if (ptr) { |
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array_static = |
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av_fast_realloc (array_static, &allocated_static, |
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sizeof (void *) * (last_static + 1)); |
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array_static[last_static++] = ptr; |
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} |
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108 |
|
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return ptr; |
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} |
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111 |
|
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112 |
/** |
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* free all static arrays and reset pointers to 0. |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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118 |
|
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119 |
void |
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av_free_static (void) |
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121 |
{ |
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while (last_static) { |
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av_freep (&array_static[--last_static]); |
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} |
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av_freep (&array_static); |
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} |
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127 |
|
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128 |
/** |
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* Frees memory and sets the pointer to NULL. |
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* @param arg pointer to the pointer which should be freed |
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*/ |
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132 |
#ifdef __SYMBIAN32__ |
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133 |
EXPORT_C |
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#endif |
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135 |
|
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136 |
void |
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av_freep (void *arg) |
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{ |
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void **ptr = (void **) arg; |
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|
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av_free (*ptr); |
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*ptr = NULL; |
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} |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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|
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148 |
|
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void |
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avcodec_get_context_defaults (AVCodecContext * s) |
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{ |
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memset (s, 0, sizeof (AVCodecContext)); |
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|
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s->frame_rate_base = 1; |
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s->frame_rate = 25; |
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} |
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157 |
|
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/** |
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* allocates a AVCodecContext and set it to defaults. |
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* this can be deallocated by simply calling free() |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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|
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AVCodecContext * |
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avcodec_alloc_context (void) |
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{ |
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AVCodecContext *avctx = av_malloc (sizeof (AVCodecContext)); |
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|
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if (avctx == NULL) |
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return NULL; |
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|
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avcodec_get_context_defaults (avctx); |
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175 |
|
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return avctx; |
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} |
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178 |
|
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/* must be called before any other functions */ |
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#ifdef __SYMBIAN32__ |
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181 |
EXPORT_C |
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#endif |
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183 |
|
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void |
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avcodec_init (void) |
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{ |
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static int inited = 0; |
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188 |
|
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if (inited != 0) |
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return; |
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inited = 1; |
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|
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dsputil_static_init (); |
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} |