diff options
Diffstat (limited to 'thirdparty/libtheora/encinfo.c')
| -rw-r--r-- | thirdparty/libtheora/encinfo.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/thirdparty/libtheora/encinfo.c b/thirdparty/libtheora/encinfo.c new file mode 100644 index 0000000000..83be1dae72 --- /dev/null +++ b/thirdparty/libtheora/encinfo.c @@ -0,0 +1,121 @@ +#include <stdlib.h> +#include <string.h> +#include "internal.h" +#include "enquant.h" +#include "huffenc.h" + + + +/*Packs a series of octets from a given byte array into the pack buffer. + _opb: The pack buffer to store the octets in. + _buf: The byte array containing the bytes to pack. + _len: The number of octets to pack.*/ +static void oc_pack_octets(oggpack_buffer *_opb,const char *_buf,int _len){ + int i; + for(i=0;i<_len;i++)oggpackB_write(_opb,_buf[i],8); +} + + + +int oc_state_flushheader(oc_theora_state *_state,int *_packet_state, + oggpack_buffer *_opb,const th_quant_info *_qinfo, + const th_huff_code _codes[TH_NHUFFMAN_TABLES][TH_NDCT_TOKENS], + const char *_vendor,th_comment *_tc,ogg_packet *_op){ + unsigned char *packet; + int b_o_s; + if(_op==NULL)return TH_EFAULT; + switch(*_packet_state){ + /*Codec info header.*/ + case OC_PACKET_INFO_HDR:{ + if(_state==NULL)return TH_EFAULT; + oggpackB_reset(_opb); + /*Mark this packet as the info header.*/ + oggpackB_write(_opb,0x80,8); + /*Write the codec string.*/ + oc_pack_octets(_opb,"theora",6); + /*Write the codec bitstream version.*/ + oggpackB_write(_opb,TH_VERSION_MAJOR,8); + oggpackB_write(_opb,TH_VERSION_MINOR,8); + oggpackB_write(_opb,TH_VERSION_SUB,8); + /*Describe the encoded frame.*/ + oggpackB_write(_opb,_state->info.frame_width>>4,16); + oggpackB_write(_opb,_state->info.frame_height>>4,16); + oggpackB_write(_opb,_state->info.pic_width,24); + oggpackB_write(_opb,_state->info.pic_height,24); + oggpackB_write(_opb,_state->info.pic_x,8); + oggpackB_write(_opb,_state->info.pic_y,8); + oggpackB_write(_opb,_state->info.fps_numerator,32); + oggpackB_write(_opb,_state->info.fps_denominator,32); + oggpackB_write(_opb,_state->info.aspect_numerator,24); + oggpackB_write(_opb,_state->info.aspect_denominator,24); + oggpackB_write(_opb,_state->info.colorspace,8); + oggpackB_write(_opb,_state->info.target_bitrate,24); + oggpackB_write(_opb,_state->info.quality,6); + oggpackB_write(_opb,_state->info.keyframe_granule_shift,5); + oggpackB_write(_opb,_state->info.pixel_fmt,2); + /*Spare configuration bits.*/ + oggpackB_write(_opb,0,3); + b_o_s=1; + }break; + /*Comment header.*/ + case OC_PACKET_COMMENT_HDR:{ + int vendor_len; + int i; + if(_tc==NULL)return TH_EFAULT; + vendor_len=strlen(_vendor); + oggpackB_reset(_opb); + /*Mark this packet as the comment header.*/ + oggpackB_write(_opb,0x81,8); + /*Write the codec string.*/ + oc_pack_octets(_opb,"theora",6); + /*Write the vendor string.*/ + oggpack_write(_opb,vendor_len,32); + oc_pack_octets(_opb,_vendor,vendor_len); + oggpack_write(_opb,_tc->comments,32); + for(i=0;i<_tc->comments;i++){ + if(_tc->user_comments[i]!=NULL){ + oggpack_write(_opb,_tc->comment_lengths[i],32); + oc_pack_octets(_opb,_tc->user_comments[i],_tc->comment_lengths[i]); + } + else oggpack_write(_opb,0,32); + } + b_o_s=0; + }break; + /*Codec setup header.*/ + case OC_PACKET_SETUP_HDR:{ + int ret; + oggpackB_reset(_opb); + /*Mark this packet as the setup header.*/ + oggpackB_write(_opb,0x82,8); + /*Write the codec string.*/ + oc_pack_octets(_opb,"theora",6); + /*Write the quantizer tables.*/ + oc_quant_params_pack(_opb,_qinfo); + /*Write the huffman codes.*/ + ret=oc_huff_codes_pack(_opb,_codes); + /*This should never happen, because we validate the tables when they + are set. + If you see, it's a good chance memory is being corrupted.*/ + if(ret<0)return ret; + b_o_s=0; + }break; + /*No more headers to emit.*/ + default:return 0; + } + /*This is kind of fugly: we hand the user a buffer which they do not own. + We will overwrite it when the next packet is output, so the user better be + done with it by then. + Vorbis is little better: it hands back buffers that it will free the next + time the headers are requested, or when the encoder is cleared. + Hopefully libogg2 will make this much cleaner.*/ + packet=oggpackB_get_buffer(_opb); + /*If there's no packet, malloc failed while writing.*/ + if(packet==NULL)return TH_EFAULT; + _op->packet=packet; + _op->bytes=oggpackB_bytes(_opb); + _op->b_o_s=b_o_s; + _op->e_o_s=0; + _op->granulepos=0; + _op->packetno=*_packet_state+3; + return ++(*_packet_state)+3; +} |