initial commit, 4.5 stable

thirdparty/libtheora/encapiwrapper.c

@@ -0,0 +1,168 @@
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include "apiwrapper.h"
+#include "encint.h"
+#include "theora/theoraenc.h"
+
+
+
+static void th_enc_api_clear(th_api_wrapper *_api){
+  if(_api->encode)th_encode_free(_api->encode);
+  memset(_api,0,sizeof(*_api));
+}
+
+static void theora_encode_clear(theora_state *_te){
+  if(_te->i!=NULL)theora_info_clear(_te->i);
+  memset(_te,0,sizeof(*_te));
+}
+
+static int theora_encode_control(theora_state *_te,int _req,
+ void *_buf,size_t _buf_sz){
+  return th_encode_ctl(((th_api_wrapper *)_te->i->codec_setup)->encode,
+   _req,_buf,_buf_sz);
+}
+
+static ogg_int64_t theora_encode_granule_frame(theora_state *_te,
+ ogg_int64_t _gp){
+  return th_granule_frame(((th_api_wrapper *)_te->i->codec_setup)->encode,_gp);
+}
+
+static double theora_encode_granule_time(theora_state *_te,ogg_int64_t _gp){
+  return th_granule_time(((th_api_wrapper *)_te->i->codec_setup)->encode,_gp);
+}
+
+static const oc_state_dispatch_vtable OC_ENC_DISPATCH_VTBL={
+  (oc_state_clear_func)theora_encode_clear,
+  (oc_state_control_func)theora_encode_control,
+  (oc_state_granule_frame_func)theora_encode_granule_frame,
+  (oc_state_granule_time_func)theora_encode_granule_time,
+};
+
+int theora_encode_init(theora_state *_te,theora_info *_ci){
+  th_api_info *apiinfo;
+  th_info      info;
+  ogg_uint32_t keyframe_frequency_force;
+  /*Allocate our own combined API wrapper/theora_info struct.
+    We put them both in one malloc'd block so that when the API wrapper is
+     freed, the info struct goes with it.
+    This avoids having to figure out whether or not we need to free the info
+     struct in either theora_info_clear() or theora_clear().*/
+  apiinfo=(th_api_info *)_ogg_malloc(sizeof(*apiinfo));
+  if(apiinfo==NULL)return TH_EFAULT;
+  /*Make our own copy of the info struct, since its lifetime should be
+     independent of the one we were passed in.*/
+  *&apiinfo->info=*_ci;
+  oc_theora_info2th_info(&info,_ci);
+  apiinfo->api.encode=th_encode_alloc(&info);
+  if(apiinfo->api.encode==NULL){
+    _ogg_free(apiinfo);
+    return OC_EINVAL;
+  }
+  apiinfo->api.clear=(oc_setup_clear_func)th_enc_api_clear;
+  /*Provide entry points for ABI compatibility with old decoder shared libs.*/
+  _te->internal_encode=(void *)&OC_ENC_DISPATCH_VTBL;
+  _te->internal_decode=NULL;
+  _te->granulepos=0;
+  _te->i=&apiinfo->info;
+  _te->i->codec_setup=&apiinfo->api;
+  /*Set the precise requested keyframe frequency.*/
+  keyframe_frequency_force=_ci->keyframe_auto_p?
+   _ci->keyframe_frequency_force:_ci->keyframe_frequency;
+  th_encode_ctl(apiinfo->api.encode,
+   TH_ENCCTL_SET_KEYFRAME_FREQUENCY_FORCE,
+   &keyframe_frequency_force,sizeof(keyframe_frequency_force));
+  /*TODO: Additional codec setup using the extra fields in theora_info.*/
+  return 0;
+}
+
+int theora_encode_YUVin(theora_state *_te,yuv_buffer *_yuv){
+  th_api_wrapper  *api;
+  th_ycbcr_buffer  buf;
+  int              ret;
+  api=(th_api_wrapper *)_te->i->codec_setup;
+  buf[0].width=_yuv->y_width;
+  buf[0].height=_yuv->y_height;
+  buf[0].stride=_yuv->y_stride;
+  buf[0].data=_yuv->y;
+  buf[1].width=_yuv->uv_width;
+  buf[1].height=_yuv->uv_height;
+  buf[1].stride=_yuv->uv_stride;
+  buf[1].data=_yuv->u;
+  buf[2].width=_yuv->uv_width;
+  buf[2].height=_yuv->uv_height;
+  buf[2].stride=_yuv->uv_stride;
+  buf[2].data=_yuv->v;
+  ret=th_encode_ycbcr_in(api->encode,buf);
+  if(ret<0)return ret;
+  _te->granulepos=api->encode->state.granpos;
+  return ret;
+}
+
+int theora_encode_packetout(theora_state *_te,int _last_p,ogg_packet *_op){
+  th_api_wrapper *api;
+  api=(th_api_wrapper *)_te->i->codec_setup;
+  return th_encode_packetout(api->encode,_last_p,_op);
+}
+
+int theora_encode_header(theora_state *_te,ogg_packet *_op){
+  oc_enc_ctx     *enc;
+  th_api_wrapper *api;
+  int             ret;
+  api=(th_api_wrapper *)_te->i->codec_setup;
+  enc=api->encode;
+  /*If we've already started encoding, fail.*/
+  if(enc->packet_state>OC_PACKET_EMPTY||enc->state.granpos!=0){
+    return TH_EINVAL;
+  }
+  /*Reset the state to make sure we output an info packet.*/
+  enc->packet_state=OC_PACKET_INFO_HDR;
+  ret=th_encode_flushheader(api->encode,NULL,_op);
+  return ret>=0?0:ret;
+}
+
+int theora_encode_comment(theora_comment *_tc,ogg_packet *_op){
+  oggpack_buffer  opb;
+  void           *buf;
+  int             packet_state;
+  int             ret;
+  packet_state=OC_PACKET_COMMENT_HDR;
+  oggpackB_writeinit(&opb);
+  ret=oc_state_flushheader(NULL,&packet_state,&opb,NULL,NULL,
+   th_version_string(),(th_comment *)_tc,_op);
+  if(ret>=0){
+    /*The oggpack_buffer's lifetime ends with this function, so we have to
+       copy out the packet contents.
+      Presumably the application knows it is supposed to free this.
+      This part works nothing like the Vorbis API, and the documentation on it
+       has been wrong for some time, claiming libtheora owned the memory.*/
+    buf=_ogg_malloc(_op->bytes);
+    if(buf==NULL){
+      _op->packet=NULL;
+      ret=TH_EFAULT;
+    }
+    else{
+      memcpy(buf,_op->packet,_op->bytes);
+      _op->packet=buf;
+      ret=0;
+    }
+  }
+  oggpack_writeclear(&opb);
+  return ret;
+}
+
+int theora_encode_tables(theora_state *_te,ogg_packet *_op){
+  oc_enc_ctx     *enc;
+  th_api_wrapper *api;
+  int             ret;
+  api=(th_api_wrapper *)_te->i->codec_setup;
+  enc=api->encode;
+  /*If we've already started encoding, fail.*/
+  if(enc->packet_state>OC_PACKET_EMPTY||enc->state.granpos!=0){
+    return TH_EINVAL;
+  }
+  /*Reset the state to make sure we output a setup packet.*/
+  enc->packet_state=OC_PACKET_SETUP_HDR;
+  ret=th_encode_flushheader(api->encode,NULL,_op);
+  return ret>=0?0:ret;
+}