LCOV - code coverage report
Current view: directory - media/libtheora/lib - decapiwrapper.c (source / functions) Found Hit Coverage
Test: app.info Lines: 95 0 0.0 %
Date: 2012-06-02 Functions: 10 0 0.0 %

       1                 : /********************************************************************
       2                 :  *                                                                  *
       3                 :  * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE.   *
       4                 :  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
       5                 :  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
       6                 :  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
       7                 :  *                                                                  *
       8                 :  * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009                *
       9                 :  * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
      10                 :  *                                                                  *
      11                 :  ********************************************************************
      12                 : 
      13                 :   function:
      14                 :     last mod: $Id: decapiwrapper.c 13596 2007-08-23 20:05:38Z tterribe $
      15                 : 
      16                 :  ********************************************************************/
      17                 : 
      18                 : #include <stdlib.h>
      19                 : #include <string.h>
      20                 : #include <limits.h>
      21                 : #include "apiwrapper.h"
      22                 : #include "decint.h"
      23                 : #include "theora/theoradec.h"
      24                 : 
      25               0 : static void th_dec_api_clear(th_api_wrapper *_api){
      26               0 :   if(_api->setup)th_setup_free(_api->setup);
      27               0 :   if(_api->decode)th_decode_free(_api->decode);
      28               0 :   memset(_api,0,sizeof(*_api));
      29               0 : }
      30                 : 
      31               0 : static void theora_decode_clear(theora_state *_td){
      32               0 :   if(_td->i!=NULL)theora_info_clear(_td->i);
      33               0 :   memset(_td,0,sizeof(*_td));
      34               0 : }
      35                 : 
      36               0 : static int theora_decode_control(theora_state *_td,int _req,
      37                 :  void *_buf,size_t _buf_sz){
      38               0 :   return th_decode_ctl(((th_api_wrapper *)_td->i->codec_setup)->decode,
      39                 :    _req,_buf,_buf_sz);
      40                 : }
      41                 : 
      42               0 : static ogg_int64_t theora_decode_granule_frame(theora_state *_td,
      43                 :  ogg_int64_t _gp){
      44               0 :   return th_granule_frame(((th_api_wrapper *)_td->i->codec_setup)->decode,_gp);
      45                 : }
      46                 : 
      47               0 : static double theora_decode_granule_time(theora_state *_td,ogg_int64_t _gp){
      48               0 :   return th_granule_time(((th_api_wrapper *)_td->i->codec_setup)->decode,_gp);
      49                 : }
      50                 : 
      51                 : static const oc_state_dispatch_vtable OC_DEC_DISPATCH_VTBL={
      52                 :   (oc_state_clear_func)theora_decode_clear,
      53                 :   (oc_state_control_func)theora_decode_control,
      54                 :   (oc_state_granule_frame_func)theora_decode_granule_frame,
      55                 :   (oc_state_granule_time_func)theora_decode_granule_time,
      56                 : };
      57                 : 
      58               0 : static void th_info2theora_info(theora_info *_ci,const th_info *_info){
      59               0 :   _ci->version_major=_info->version_major;
      60               0 :   _ci->version_minor=_info->version_minor;
      61               0 :   _ci->version_subminor=_info->version_subminor;
      62               0 :   _ci->width=_info->frame_width;
      63               0 :   _ci->height=_info->frame_height;
      64               0 :   _ci->frame_width=_info->pic_width;
      65               0 :   _ci->frame_height=_info->pic_height;
      66               0 :   _ci->offset_x=_info->pic_x;
      67               0 :   _ci->offset_y=_info->pic_y;
      68               0 :   _ci->fps_numerator=_info->fps_numerator;
      69               0 :   _ci->fps_denominator=_info->fps_denominator;
      70               0 :   _ci->aspect_numerator=_info->aspect_numerator;
      71               0 :   _ci->aspect_denominator=_info->aspect_denominator;
      72               0 :   switch(_info->colorspace){
      73               0 :     case TH_CS_ITU_REC_470M:_ci->colorspace=OC_CS_ITU_REC_470M;break;
      74               0 :     case TH_CS_ITU_REC_470BG:_ci->colorspace=OC_CS_ITU_REC_470BG;break;
      75               0 :     default:_ci->colorspace=OC_CS_UNSPECIFIED;break;
      76                 :   }
      77               0 :   switch(_info->pixel_fmt){
      78               0 :     case TH_PF_420:_ci->pixelformat=OC_PF_420;break;
      79               0 :     case TH_PF_422:_ci->pixelformat=OC_PF_422;break;
      80               0 :     case TH_PF_444:_ci->pixelformat=OC_PF_444;break;
      81               0 :     default:_ci->pixelformat=OC_PF_RSVD;
      82                 :   }
      83               0 :   _ci->target_bitrate=_info->target_bitrate;
      84               0 :   _ci->quality=_info->quality;
      85               0 :   _ci->keyframe_frequency_force=1<<_info->keyframe_granule_shift;
      86               0 : }
      87                 : 
      88               0 : int theora_decode_init(theora_state *_td,theora_info *_ci){
      89                 :   th_api_info    *apiinfo;
      90                 :   th_api_wrapper *api;
      91                 :   th_info         info;
      92               0 :   api=(th_api_wrapper *)_ci->codec_setup;
      93                 :   /*Allocate our own combined API wrapper/theora_info struct.
      94                 :     We put them both in one malloc'd block so that when the API wrapper is
      95                 :      freed, the info struct goes with it.
      96                 :     This avoids having to figure out whether or not we need to free the info
      97                 :      struct in either theora_info_clear() or theora_clear().*/
      98               0 :   apiinfo=(th_api_info *)_ogg_calloc(1,sizeof(*apiinfo));
      99               0 :   if(apiinfo==NULL)return OC_FAULT;
     100                 :   /*Make our own copy of the info struct, since its lifetime should be
     101                 :      independent of the one we were passed in.*/
     102               0 :   *&apiinfo->info=*_ci;
     103                 :   /*Convert the info struct now instead of saving the the one we decoded with
     104                 :      theora_decode_header(), since the user might have modified values (i.e.,
     105                 :      color space, aspect ratio, etc. can be specified from a higher level).
     106                 :     The user also might be doing something "clever" with the header packets if
     107                 :      they are not using an Ogg encapsulation.*/
     108               0 :   oc_theora_info2th_info(&info,_ci);
     109                 :   /*Don't bother to copy the setup info; th_decode_alloc() makes its own copy
     110                 :      of the stuff it needs.*/
     111               0 :   apiinfo->api.decode=th_decode_alloc(&info,api->setup);
     112               0 :   if(apiinfo->api.decode==NULL){
     113               0 :     _ogg_free(apiinfo);
     114               0 :     return OC_EINVAL;
     115                 :   }
     116               0 :   apiinfo->api.clear=(oc_setup_clear_func)th_dec_api_clear;
     117               0 :   _td->internal_encode=NULL;
     118                 :   /*Provide entry points for ABI compatibility with old decoder shared libs.*/
     119               0 :   _td->internal_decode=(void *)&OC_DEC_DISPATCH_VTBL;
     120               0 :   _td->granulepos=0;
     121               0 :   _td->i=&apiinfo->info;
     122               0 :   _td->i->codec_setup=&apiinfo->api;
     123               0 :   return 0;
     124                 : }
     125                 : 
     126               0 : int theora_decode_header(theora_info *_ci,theora_comment *_cc,ogg_packet *_op){
     127                 :   th_api_wrapper *api;
     128                 :   th_info         info;
     129                 :   int             ret;
     130               0 :   api=(th_api_wrapper *)_ci->codec_setup;
     131                 :   /*Allocate an API wrapper struct on demand, since it will not also include a
     132                 :      theora_info struct like the ones that are used in a theora_state struct.*/
     133               0 :   if(api==NULL){
     134               0 :     _ci->codec_setup=_ogg_calloc(1,sizeof(*api));
     135               0 :     if(_ci->codec_setup==NULL)return OC_FAULT;
     136               0 :     api=(th_api_wrapper *)_ci->codec_setup;
     137               0 :     api->clear=(oc_setup_clear_func)th_dec_api_clear;
     138                 :   }
     139                 :   /*Convert from the theora_info struct instead of saving our own th_info
     140                 :      struct between calls.
     141                 :     The user might be doing something "clever" with the header packets if they
     142                 :      are not using an Ogg encapsulation, and we don't want to break this.*/
     143               0 :   oc_theora_info2th_info(&info,_ci);
     144                 :   /*We rely on the fact that theora_comment and th_comment structures are
     145                 :      actually identical.
     146                 :     Take care not to change this fact unless you change the code here as
     147                 :      well!*/
     148               0 :   ret=th_decode_headerin(&info,(th_comment *)_cc,&api->setup,_op);
     149                 :   /*We also rely on the fact that the error return code values are the same,
     150                 :     and that the implementations of these two functions return the same set of
     151                 :     them.
     152                 :    Note that theora_decode_header() really can return OC_NOTFORMAT, even
     153                 :     though it is not currently documented to do so.*/
     154               0 :   if(ret<0)return ret;
     155               0 :   th_info2theora_info(_ci,&info);
     156               0 :   return 0;
     157                 : }
     158                 : 
     159               0 : int theora_decode_packetin(theora_state *_td,ogg_packet *_op){
     160                 :   th_api_wrapper *api;
     161                 :   ogg_int64_t     gp;
     162                 :   int             ret;
     163               0 :   if(!_td||!_td->i||!_td->i->codec_setup)return OC_FAULT;
     164               0 :   api=(th_api_wrapper *)_td->i->codec_setup;
     165               0 :   ret=th_decode_packetin(api->decode,_op,&gp);
     166               0 :   if(ret<0)return OC_BADPACKET;
     167               0 :   _td->granulepos=gp;
     168               0 :   return 0;
     169                 : }
     170                 : 
     171               0 : int theora_decode_YUVout(theora_state *_td,yuv_buffer *_yuv){
     172                 :   th_api_wrapper  *api;
     173                 :   th_dec_ctx      *decode;
     174                 :   th_ycbcr_buffer  buf;
     175                 :   int              ret;
     176               0 :   if(!_td||!_td->i||!_td->i->codec_setup)return OC_FAULT;
     177               0 :   api=(th_api_wrapper *)_td->i->codec_setup;
     178               0 :   decode=(th_dec_ctx *)api->decode;
     179               0 :   if(!decode)return OC_FAULT;
     180               0 :   ret=th_decode_ycbcr_out(decode,buf);
     181               0 :   if(ret>=0){
     182               0 :     _yuv->y_width=buf[0].width;
     183               0 :     _yuv->y_height=buf[0].height;
     184               0 :     _yuv->y_stride=buf[0].stride;
     185               0 :     _yuv->uv_width=buf[1].width;
     186               0 :     _yuv->uv_height=buf[1].height;
     187               0 :     _yuv->uv_stride=buf[1].stride;
     188               0 :     _yuv->y=buf[0].data;
     189               0 :     _yuv->u=buf[1].data;
     190               0 :     _yuv->v=buf[2].data;
     191                 :   }
     192               0 :   return ret;
     193                 : }

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