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-rw-r--r--ext/tarkin/info.c551
1 files changed, 551 insertions, 0 deletions
diff --git a/ext/tarkin/info.c b/ext/tarkin/info.c
new file mode 100644
index 00000000..e555e381
--- /dev/null
+++ b/ext/tarkin/info.c
@@ -0,0 +1,551 @@
+/********************************************************************
+ * *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
+ * *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
+ * by the XIPHOPHORUS Company http://www.xiph.org/ *
+
+ ********************************************************************
+
+ function: maintain the info structure, info <-> header packets
+ last mod: $Id$
+
+ ********************************************************************/
+
+/* general handling of the header and the TarkinInfo structure (and
+ substructures) */
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <ogg/ogg.h>
+#include "tarkin.h"
+#include "yuv.h"
+#include "mem.h"
+
+/* helpers */
+static void _v_writestring(oggpack_buffer *o,char *s, int bytes){
+ while(bytes--){
+ oggpack_write(o,*s++,8);
+ }
+}
+
+static void _v_readstring(oggpack_buffer *o,char *buf,int bytes){
+ while(bytes--){
+ *buf++=oggpack_read(o,8);
+ }
+}
+
+void tarkin_comment_init(TarkinComment *vc){
+ memset(vc,0,sizeof(*vc));
+}
+
+void tarkin_comment_add(TarkinComment *vc,char *comment){
+ vc->user_comments=REALLOC(vc->user_comments,
+ (vc->comments+2)*sizeof(*vc->user_comments));
+ vc->comment_lengths=REALLOC(vc->comment_lengths,
+ (vc->comments+2)*sizeof(*vc->comment_lengths));
+ vc->comment_lengths[vc->comments]=strlen(comment);
+ vc->user_comments[vc->comments]=MALLOC(vc->comment_lengths[vc->comments]+1);
+ strcpy(vc->user_comments[vc->comments], comment);
+ vc->comments++;
+ vc->user_comments[vc->comments]=NULL;
+}
+
+void tarkin_comment_add_tag(TarkinComment *vc, char *tag, char *contents){
+ char *comment=alloca(strlen(tag)+strlen(contents)+2); /* +2 for = and \0 */
+ strcpy(comment, tag);
+ strcat(comment, "=");
+ strcat(comment, contents);
+ tarkin_comment_add(vc, comment);
+}
+
+/* This is more or less the same as strncasecmp - but that doesn't exist
+ * everywhere, and this is a fairly trivial function, so we include it */
+static int tagcompare(const char *s1, const char *s2, int n){
+ int c=0;
+ while(c < n){
+ if(toupper(s1[c]) != toupper(s2[c]))
+ return !0;
+ c++;
+ }
+ return 0;
+}
+
+char *tarkin_comment_query(TarkinComment *vc, char *tag, int count){
+ long i;
+ int found = 0;
+ int taglen = strlen(tag)+1; /* +1 for the = we append */
+ char *fulltag = alloca(taglen+ 1);
+
+ strcpy(fulltag, tag);
+ strcat(fulltag, "=");
+
+ for(i=0;i<vc->comments;i++){
+ if(!tagcompare(vc->user_comments[i], fulltag, taglen)){
+ if(count == found)
+ /* We return a pointer to the data, not a copy */
+ return vc->user_comments[i] + taglen;
+ else
+ found++;
+ }
+ }
+ return NULL; /* didn't find anything */
+}
+
+int tarkin_comment_query_count(TarkinComment *vc, char *tag){
+ int i,count=0;
+ int taglen = strlen(tag)+1; /* +1 for the = we append */
+ char *fulltag = alloca(taglen+1);
+ strcpy(fulltag,tag);
+ strcat(fulltag, "=");
+
+ for(i=0;i<vc->comments;i++){
+ if(!tagcompare(vc->user_comments[i], fulltag, taglen))
+ count++;
+ }
+
+ return count;
+}
+
+void tarkin_comment_clear(TarkinComment *vc){
+ if(vc){
+ long i;
+ for(i=0;i<vc->comments;i++)
+ if(vc->user_comments[i])FREE(vc->user_comments[i]);
+ if(vc->user_comments)FREE(vc->user_comments);
+ if(vc->comment_lengths)FREE(vc->comment_lengths);
+ if(vc->vendor)FREE(vc->vendor);
+ }
+ memset(vc,0,sizeof(*vc));
+}
+
+/* used by synthesis, which has a full, alloced vi */
+void tarkin_info_init(TarkinInfo *vi){
+ memset(vi,0,sizeof(*vi));
+}
+
+void tarkin_info_clear(TarkinInfo *vi){
+ memset(vi,0,sizeof(*vi));
+}
+
+/* Header packing/unpacking ********************************************/
+
+static int _tarkin_unpack_info(TarkinInfo *vi,oggpack_buffer *opb)
+{
+#ifdef DBG_OGG
+ printf("dbg_ogg: Decoding Info: ");
+#endif
+ vi->version=oggpack_read(opb,32);
+ if(vi->version!=0)return(-TARKIN_VERSION);
+
+ vi->n_layers=oggpack_read(opb,8);
+ vi->inter.numerator=oggpack_read(opb,32);
+ vi->inter.denominator=oggpack_read(opb,32);
+
+ vi->bitrate_upper=oggpack_read(opb,32);
+ vi->bitrate_nominal=oggpack_read(opb,32);
+ vi->bitrate_lower=oggpack_read(opb,32);
+
+#ifdef DBG_OGG
+ printf(" n_layers %d, interleave: %d/%d, ",
+ vi->n_layers, vi->inter.numerator, vi->inter.denominator);
+#endif
+
+ if(vi->inter.numerator<1)goto err_out;
+ if(vi->inter.denominator<1)goto err_out;
+ if(vi->n_layers<1)goto err_out;
+
+ if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
+
+#ifdef DBG_OGG
+ printf("Success\n");
+#endif
+ return(0);
+ err_out:
+#ifdef DBG_OGG
+ printf("Failed\n");
+#endif
+ tarkin_info_clear(vi);
+ return(-TARKIN_BAD_HEADER);
+}
+
+static int _tarkin_unpack_comment(TarkinComment *vc,oggpack_buffer *opb)
+{
+ int i;
+ int vendorlen=oggpack_read(opb,32);
+
+#ifdef DBG_OGG
+ printf("dbg_ogg: Decoding comment: ");
+#endif
+ if(vendorlen<0)goto err_out;
+ vc->vendor=_ogg_calloc(vendorlen+1,1);
+ _v_readstring(opb,vc->vendor,vendorlen);
+ vc->comments=oggpack_read(opb,32);
+ if(vc->comments<0)goto err_out;
+ vc->user_comments=_ogg_calloc(vc->comments+1,sizeof(*vc->user_comments));
+ vc->comment_lengths=_ogg_calloc(vc->comments+1,
+ sizeof(*vc->comment_lengths));
+
+ for(i=0;i<vc->comments;i++){
+ int len=oggpack_read(opb,32);
+ if(len<0)goto err_out;
+ vc->comment_lengths[i]=len;
+ vc->user_comments[i]=_ogg_calloc(len+1,1);
+ _v_readstring(opb,vc->user_comments[i],len);
+ }
+ if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
+
+#ifdef DBG_OGG
+ printf("Success, read %d comments\n", vc->comments);
+#endif
+ return(0);
+ err_out:
+#ifdef DBG_OGG
+ printf("Failed\n");
+#endif
+ tarkin_comment_clear(vc);
+ return(-TARKIN_BAD_HEADER);
+}
+
+/* the real encoding details are here, currently TarkinVideoLayerDesc. */
+static int _tarkin_unpack_layer_desc(TarkinInfo *vi,oggpack_buffer *opb){
+ int i,j;
+ vi->layer = CALLOC (vi->n_layers, (sizeof(*vi->layer)));
+ memset(vi->layer,0, vi->n_layers * sizeof(*vi->layer));
+
+#ifdef DBG_OGG
+ printf("ogg: Decoding layers description: ");
+#endif
+ for(i=0;i<vi->n_layers;i++){
+ TarkinVideoLayer *layer = vi->layer + i;
+ layer->desc.width = oggpack_read(opb,32);
+ layer->desc.height = oggpack_read(opb,32);
+ layer->desc.a_moments = oggpack_read(opb,32);
+ layer->desc.s_moments = oggpack_read(opb,32);
+ layer->desc.frames_per_buf = oggpack_read(opb,32);
+ layer->desc.bitstream_len = oggpack_read(opb,32);
+ layer->desc.format = oggpack_read(opb,32);
+
+ switch (layer->desc.format) {
+ case TARKIN_GRAYSCALE:
+ layer->n_comp = 1;
+ layer->color_fwd_xform = grayscale_to_y;
+ layer->color_inv_xform = y_to_grayscale;
+ break;
+ case TARKIN_RGB24:
+ layer->n_comp = 3;
+ layer->color_fwd_xform = rgb24_to_yuv;
+ layer->color_inv_xform = yuv_to_rgb24;
+ break;
+ case TARKIN_RGB32:
+ layer->n_comp = 3;
+ layer->color_fwd_xform = rgb32_to_yuv;
+ layer->color_inv_xform = yuv_to_rgb32;
+ break;
+ case TARKIN_RGBA:
+ layer->n_comp = 4;
+ layer->color_fwd_xform = rgba_to_yuv;
+ layer->color_inv_xform = yuv_to_rgba;
+ break;
+ default:
+ return -TARKIN_INVALID_COLOR_FORMAT;
+ };
+
+ layer->waveletbuf = (Wavelet3DBuf**) CALLOC (layer->n_comp,
+ sizeof(Wavelet3DBuf*));
+
+ layer->packet = MALLOC (layer->n_comp * sizeof(*layer->packet));
+ memset(layer->packet, 0, layer->n_comp * sizeof(*layer->packet));
+
+ for (j=0; j<layer->n_comp; j++){
+ layer->waveletbuf[j] = wavelet_3d_buf_new (layer->desc.width,
+ layer->desc.height,
+ layer->desc.frames_per_buf);
+ layer->packet[j].data = MALLOC(layer->desc.bitstream_len);
+ layer->packet[j].storage = layer->desc.bitstream_len;
+ }
+
+ vi->max_bitstream_len += layer->desc.bitstream_len
+ + 2 * 10 * sizeof(uint32_t) * layer->n_comp; // truncation tables
+
+#ifdef DBG_OGG
+ printf("\n layer%d: size %dx%dx%d, format %d, a_m %d, s_m %d, %d fpb\n",
+ i, layer->desc.width, layer->desc.height, layer->n_comp,
+ layer->desc.format, layer->desc.a_moments, layer->desc.s_moments,
+ layer->desc.frames_per_buf);
+#endif
+ } /* for each layer */
+
+ if(oggpack_read(opb,1)!=1)goto err_out; /* EOP check */
+
+#ifdef DBG_OGG
+ printf("Success\n");
+#endif
+
+ return(0);
+ err_out:
+#ifdef DBG_OGG
+ printf("Failed\n");
+#endif
+ tarkin_info_clear(vi);
+ return(-TARKIN_BAD_HEADER);
+}
+
+/* The Tarkin header is in three packets; the initial small packet in
+ the first page that identifies basic parameters, a second packet
+ with bitstream comments and a third packet that holds the
+ layer description structures. */
+
+TarkinError tarkin_synthesis_headerin(TarkinInfo *vi,TarkinComment *vc,ogg_packet *op){
+ oggpack_buffer opb;
+
+ if(op){
+ oggpack_readinit(&opb,op->packet,op->bytes);
+
+ /* Which of the three types of header is this? */
+ /* Also verify header-ness, tarkin */
+ {
+ char buffer[6];
+ int packtype=oggpack_read(&opb,8);
+ memset(buffer,0,6);
+ _v_readstring(&opb,buffer,6);
+ if(memcmp(buffer,"tarkin",6)){
+ /* not a tarkin header */
+ return(-TARKIN_NOT_TARKIN);
+ }
+ switch(packtype){
+ case 0x01: /* least significant *bit* is read first */
+ if(!op->b_o_s){
+ /* Not the initial packet */
+ return(-TARKIN_BAD_HEADER);
+ }
+ if(vi->inter.numerator!=0){
+ /* previously initialized info header */
+ return(-TARKIN_BAD_HEADER);
+ }
+
+ return(_tarkin_unpack_info(vi,&opb));
+
+ case 0x03: /* least significant *bit* is read first */
+ if(vi->inter.denominator==0){
+ /* um... we didn't get the initial header */
+ return(-TARKIN_BAD_HEADER);
+ }
+
+ return(_tarkin_unpack_comment(vc,&opb));
+
+ case 0x05: /* least significant *bit* is read first */
+ if(vi->inter.numerator == 0 || vc->vendor==NULL){
+ /* um... we didn;t get the initial header or comments yet */
+ return(-TARKIN_BAD_HEADER);
+ }
+
+ return(_tarkin_unpack_layer_desc(vi,&opb));
+
+ default:
+ /* Not a valid tarkin header type */
+ return(-TARKIN_BAD_HEADER);
+ break;
+ }
+ }
+ }
+ return(-TARKIN_BAD_HEADER);
+}
+
+/* pack side **********************************************************/
+
+static int _tarkin_pack_info(oggpack_buffer *opb,TarkinInfo *vi){
+
+ /* preamble */
+ oggpack_write(opb,0x01,8);
+ _v_writestring(opb,"tarkin", 6);
+
+ /* basic information about the stream */
+ oggpack_write(opb,0x00,32);
+ oggpack_write(opb,vi->n_layers,8);
+ oggpack_write(opb,vi->inter.numerator,32);
+ oggpack_write(opb,vi->inter.denominator,32);
+
+ oggpack_write(opb,vi->bitrate_upper,32);
+ oggpack_write(opb,vi->bitrate_nominal,32);
+ oggpack_write(opb,vi->bitrate_lower,32);
+
+ oggpack_write(opb,1,1);
+
+#ifdef DBG_OGG
+ printf("dbg_ogg: Putting out info, inter %d/%d, n_layers %d\n",
+ vi->inter.numerator,vi->inter.denominator,vi->n_layers);
+#endif
+ return(0);
+}
+
+static int _tarkin_pack_comment(oggpack_buffer *opb,TarkinComment *vc){
+ char temp[]="libTarkin debugging edition 20011104";
+ int bytes = strlen(temp);
+
+ /* preamble */
+ oggpack_write(opb,0x03,8);
+ _v_writestring(opb,"tarkin", 6);
+
+ /* vendor */
+ oggpack_write(opb,bytes,32);
+ _v_writestring(opb,temp, bytes);
+
+ /* comments */
+
+ oggpack_write(opb,vc->comments,32);
+ if(vc->comments){
+ int i;
+ for(i=0;i<vc->comments;i++){
+ if(vc->user_comments[i]){
+ oggpack_write(opb,vc->comment_lengths[i],32);
+ _v_writestring(opb,vc->user_comments[i], vc->comment_lengths[i]);
+ }else{
+ oggpack_write(opb,0,32);
+ }
+ }
+ }
+ oggpack_write(opb,1,1);
+
+#ifdef DBG_OGG
+ printf("dbg_ogg: Putting out %d comments\n", vc->comments);
+#endif
+
+ return(0);
+}
+
+static int _tarkin_pack_layer_desc(oggpack_buffer *opb,TarkinInfo *vi)
+{
+ int i;
+ TarkinVideoLayer *layer;
+
+#ifdef DBG_OGG
+ printf("dbg_ogg: Putting out layers description:\n");
+#endif
+
+ oggpack_write(opb,0x05,8);
+ _v_writestring(opb,"tarkin", 6);
+
+ for(i=0;i<vi->n_layers;i++){
+ layer = vi->layer + i;
+ oggpack_write(opb,layer->desc.width,32);
+ oggpack_write(opb,layer->desc.height,32);
+ oggpack_write(opb,layer->desc.a_moments,32);
+ oggpack_write(opb,layer->desc.s_moments,32);
+ oggpack_write(opb,layer->desc.frames_per_buf,32);
+ oggpack_write(opb,layer->desc.bitstream_len,32);
+ oggpack_write(opb,layer->desc.format,32);
+
+#ifdef DBG_OGG
+ printf(" res. %dx%d, format %d, a_m %d, s_m %d, fpb %d\n",
+ layer->desc.width, layer->desc.height, layer->desc.format,
+ layer->desc.a_moments, layer->desc.s_moments,
+ layer->desc.frames_per_buf);
+#endif
+
+ }
+ oggpack_write(opb,1,1);
+
+#ifdef DBG_OGG
+ printf(" wrote %ld bytes.\n", oggpack_bytes(opb));
+#endif
+
+ return(0);
+}
+
+int tarkin_comment_header_out(TarkinComment *vc, ogg_packet *op)
+{
+
+ oggpack_buffer opb;
+
+ oggpack_writeinit(&opb);
+ if(_tarkin_pack_comment(&opb,vc)) return -TARKIN_NOT_IMPLEMENTED;
+
+ op->packet = MALLOC(oggpack_bytes(&opb));
+ memcpy(op->packet, opb.buffer, oggpack_bytes(&opb));
+
+ op->bytes=oggpack_bytes(&opb);
+ op->b_o_s=0;
+ op->e_o_s=0;
+ op->granulepos=0;
+
+ return 0;
+}
+
+TarkinError tarkin_analysis_headerout(TarkinStream *v,
+ TarkinComment *vc,
+ ogg_packet *op,
+ ogg_packet *op_comm,
+ ogg_packet *op_code)
+{
+ int ret=-TARKIN_NOT_IMPLEMENTED;
+ TarkinInfo * vi;
+ oggpack_buffer opb;
+ tarkin_header_store *b=&v->headers;
+
+ vi = v->ti;
+
+ /* first header packet **********************************************/
+
+ oggpack_writeinit(&opb);
+ if(_tarkin_pack_info(&opb,vi))goto err_out;
+
+ /* build the packet */
+ if(b->header)FREE(b->header);
+ b->header=MALLOC(oggpack_bytes(&opb));
+ memcpy(b->header,opb.buffer,oggpack_bytes(&opb));
+ op->packet=b->header;
+ op->bytes=oggpack_bytes(&opb);
+ op->b_o_s=1;
+ op->e_o_s=0;
+ op->granulepos=0;
+
+ /* second header packet (comments) **********************************/
+
+ oggpack_reset(&opb);
+ if(_tarkin_pack_comment(&opb,vc))goto err_out;
+
+ if(b->header1)FREE(b->header1);
+ b->header1=MALLOC(oggpack_bytes(&opb));
+ memcpy(b->header1,opb.buffer,oggpack_bytes(&opb));
+ op_comm->packet=b->header1;
+ op_comm->bytes=oggpack_bytes(&opb);
+ op_comm->b_o_s=0;
+ op_comm->e_o_s=0;
+ op_comm->granulepos=0;
+
+ /* third header packet (modes/codebooks) ****************************/
+
+ oggpack_reset(&opb);
+ if(_tarkin_pack_layer_desc(&opb,vi))goto err_out;
+
+ if(b->header2)FREE(b->header2);
+ b->header2=MALLOC(oggpack_bytes(&opb));
+ memcpy(b->header2,opb.buffer,oggpack_bytes(&opb));
+ op_code->packet=b->header2;
+ op_code->bytes=oggpack_bytes(&opb);
+ op_code->b_o_s=0;
+ op_code->e_o_s=0;
+ op_code->granulepos=0;
+
+ oggpack_writeclear(&opb);
+ return(0);
+ err_out:
+ oggpack_writeclear(&opb);
+ memset(op,0,sizeof(*op));
+ memset(op_comm,0,sizeof(*op_comm));
+ memset(op_code,0,sizeof(*op_code));
+
+ if(b->header)FREE(b->header);
+ if(b->header1)FREE(b->header1);
+ if(b->header2)FREE(b->header2);
+ b->header=NULL;
+ b->header1=NULL;
+ b->header2=NULL;
+ return(ret);
+}
+
generated by cgit v1.2.1 (git 2.18.0) at 2024-06-30 03:31:20 +0000