diff options
Diffstat (limited to 'thirdparty/libtheora/encapiwrapper.c')
| -rw-r--r-- | thirdparty/libtheora/encapiwrapper.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/thirdparty/libtheora/encapiwrapper.c b/thirdparty/libtheora/encapiwrapper.c new file mode 100644 index 0000000000..874f12442d --- /dev/null +++ b/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; +} |