[xiph-commits] r16271 - branches/theora-gumboot/examples
gumboot at svn.xiph.org
gumboot at svn.xiph.org
Mon Jul 13 15:29:41 PDT 2009
Author: gumboot
Date: 2009-07-13 15:29:40 -0700 (Mon, 13 Jul 2009)
New Revision: 16271
Added:
branches/theora-gumboot/examples/dump_video.c
Removed:
branches/theora-gumboot/examples/dump_video.c
Log:
Update dump_video.c to get consistent hashes with thusnelda.
Deleted: branches/theora-gumboot/examples/dump_video.c
===================================================================
--- branches/theora-gumboot/examples/dump_video.c 2009-07-13 15:56:30 UTC (rev 16270)
+++ branches/theora-gumboot/examples/dump_video.c 2009-07-13 22:29:40 UTC (rev 16271)
@@ -1,450 +0,0 @@
-/********************************************************************
- * *
- * THIS FILE IS PART OF THE OggTheora 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 Theora SOURCE CODE IS COPYRIGHT (C) 2002-2007 *
- * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
- * *
- ********************************************************************
-
- function: example dumpvid application; dumps Theora streams
- last mod: $Id$
-
- ********************************************************************/
-
-/* By Mauricio Piacentini (mauricio at xiph.org) */
-/* simply dump decoded YUV data, for verification of theora bitstream */
-
-#if !defined(_GNU_SOURCE)
-#define _GNU_SOURCE
-#endif
-#if !defined(_LARGEFILE_SOURCE)
-#define _LARGEFILE_SOURCE
-#endif
-#if !defined(_LARGEFILE64_SOURCE)
-#define _LARGEFILE64_SOURCE
-#endif
-#if !defined(_FILE_OFFSET_BITS)
-#define _FILE_OFFSET_BITS 64
-#endif
-
-#include <stdio.h>
-#if !defined(_WIN32)
-#include <getopt.h>
-#include <unistd.h>
-#else
-#include "getopt.h"
-#endif
-#include <stdlib.h>
-#include <string.h>
-#include <sys/timeb.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-/*Yes, yes, we're going to hell.*/
-#if defined(_WIN32)
-#include <io.h>
-#endif
-#include <fcntl.h>
-#include <math.h>
-#include <signal.h>
-#include "theora/theora.h"
-
-const char *optstring = "o:rf";
-struct option options [] = {
- {"output",required_argument,NULL,'o'},
- {"raw",no_argument, NULL,'r'}, /*Disable YUV4MPEG2 headers:*/
- {"fps-only",no_argument, NULL, 'f'}, /* Only interested in fps of decode loop */
- {NULL,0,NULL,0}
-};
-
-/* Helper; just grab some more compressed bitstream and sync it for
- page extraction */
-int buffer_data(FILE *in,ogg_sync_state *oy){
- char *buffer=ogg_sync_buffer(oy,4096);
- int bytes=fread(buffer,1,4096,in);
- ogg_sync_wrote(oy,bytes);
- return(bytes);
-}
-
-/* never forget that globals are a one-way ticket to Hell */
-/* Ogg and codec state for demux/decode */
-ogg_sync_state oy;
-ogg_page og;
-ogg_stream_state vo;
-ogg_stream_state to;
-theora_info ti;
-theora_comment tc;
-theora_state td;
-
-int theora_p=0;
-int stateflag=0;
-
-/* single frame video buffering */
-int videobuf_ready=0;
-ogg_int64_t videobuf_granulepos=-1;
-double videobuf_time=0;
-int raw=0;
-
-FILE* outfile = NULL;
-
-int got_sigint=0;
-static void sigint_handler (int signal) {
- got_sigint = 1;
-}
-
-/* this is a nop in the current implementation. we could
- open a file here or something if so moved. */
-static void open_video(void){
- return;
-}
-
-/* write out the planar YUV frame, uncropped */
-static void video_write(void){
- int i;
-
- yuv_buffer yuv;
- theora_decode_YUVout(&td,&yuv);
-
- if(outfile){
- if(!raw)
- fprintf(outfile, "FRAME\n");
- for(i=0;i<yuv.y_height;i++)
- fwrite(yuv.y+yuv.y_stride*i, 1, yuv.y_width, outfile);
- for(i=0;i<yuv.uv_height;i++)
- fwrite(yuv.u+yuv.uv_stride*i, 1, yuv.uv_width, outfile);
- for(i=0;i<yuv.uv_height;i++)
- fwrite(yuv.v+yuv.uv_stride*i, 1, yuv.uv_width, outfile);
- }
-}
-
-/* dump the theora comment header */
-static int dump_comments(theora_comment *tc){
- int i, len;
- char *value;
- FILE *out=stderr;
-
- fprintf(out,"Encoded by %s\n",tc->vendor);
- if(tc->comments){
- fprintf(out, "theora comment header:\n");
- for(i=0;i<tc->comments;i++){
- if(tc->user_comments[i]){
- len=tc->comment_lengths[i];
- value=malloc(len+1);
- memcpy(value,tc->user_comments[i],len);
- value[len]='\0';
- fprintf(out, "\t%s\n", value);
- free(value);
- }
- }
- }
- return(0);
-}
-
-
-
-/* helper: push a page into the appropriate steam */
-/* this can be done blindly; a stream won't accept a page
- that doesn't belong to it */
-static int queue_page(ogg_page *page){
- if(theora_p)ogg_stream_pagein(&to,page);
- return 0;
-}
-
-static void usage(void){
- fprintf(stderr,
- "Usage: dumpvid <file.ogv> > outfile\n"
- "input is read from stdin if no file is passed on the command line\n"
- "\n"
- );
-}
-
-int main(int argc,char *const *argv){
-
- ogg_packet op;
-
- int long_option_index;
- int c;
-
- struct timeb start;
- struct timeb after;
- struct timeb last;
- int fps_only=0;
- int frames = 0;
-
- FILE *infile = stdin;
- outfile = stdout;
-
-#ifdef _WIN32 /* We need to set stdin/stdout to binary mode on windows. */
- /* Beware the evil ifdef. We avoid these where we can, but this one we
- cannot. Don't add any more, you'll probably go to hell if you do. */
- _setmode( _fileno( stdin ), _O_BINARY );
- _setmode( _fileno( stdout ), _O_BINARY );
-#endif
-
- /* Process option arguments. */
- while((c=getopt_long(argc,argv,optstring,options,&long_option_index))!=EOF){
- switch(c){
- case 'o':
- if(strcmp(optarg,"-")!=0){
- outfile=fopen(optarg,"wb");
- if(outfile==NULL){
- fprintf(stderr,"Unable to open output file '%s'\n", optarg);
- exit(1);
- }
- }else{
- outfile=stdout;
- }
- break;
-
- case 'r':
- raw=1;
- break;
-
- case 'f':
- fps_only = 1;
- outfile = NULL;
- break;
-
- default:
- usage();
- }
- }
- if(optind<argc){
- infile=fopen(argv[optind],"rb");
- if(infile==NULL){
- fprintf(stderr,"Unable to open '%s' for extraction.\n", argv[optind]);
- exit(1);
- }
- if(++optind<argc){
- usage();
- exit(1);
- }
- }
-
- /*
- Ok, Ogg parsing. The idea here is we have a bitstream
- that is made up of Ogg pages. The libogg sync layer will
- find them for us. There may be pages from several logical
- streams interleaved; we find the first theora stream and
- ignore any others.
-
- Then we pass the pages for our stream to the libogg stream
- layer which assembles our original set of packets out of
- them. It's the packets that libtheora actually knows how
- to handle.
- */
-
- /* start up Ogg stream synchronization layer */
- ogg_sync_init(&oy);
-
- /* init supporting Theora structures needed in header parsing */
- theora_comment_init(&tc);
- theora_info_init(&ti);
-
- /* Ogg file open; parse the headers */
-
- /* Theora (like Vorbis) depends on some initial header packets
- for decoder setup and initialization. We retrieve these first
- before entering the main decode loop. */
-
- /* Only interested in Theora streams */
- while(!stateflag){
- int ret=buffer_data(infile,&oy);
- if(ret==0)break;
- while(ogg_sync_pageout(&oy,&og)>0){
- ogg_stream_state test;
-
- /* is this a mandated initial header? If not, stop parsing */
- if(!ogg_page_bos(&og)){
- /* don't leak the page; get it into the appropriate stream */
- queue_page(&og);
- stateflag=1;
- break;
- }
-
- ogg_stream_init(&test,ogg_page_serialno(&og));
- ogg_stream_pagein(&test,&og);
- ogg_stream_packetout(&test,&op);
-
- /* identify the codec: try theora */
- if(!theora_p && theora_decode_header(&ti,&tc,&op)>=0){
- /* it is theora -- save this stream state */
- memcpy(&to,&test,sizeof(test));
- theora_p=1;
- }else{
- /* whatever it is, we don't care about it */
- ogg_stream_clear(&test);
- }
- }
- /* fall through to non-bos page parsing */
- }
-
- /* we're expecting more header packets. */
- while(theora_p && theora_p<3){
- int ret;
-
- /* look for further theora headers */
- while(theora_p && (theora_p<3) && (ret=ogg_stream_packetout(&to,&op))){
- if(ret<0){
- fprintf(stderr,"Error parsing Theora stream headers; "
- "corrupt stream?\n");
- exit(1);
- }
- if(theora_decode_header(&ti,&tc,&op)){
- fprintf(stderr,"Error parsing Theora stream headers; "
- "corrupt stream?\n");
- exit(1);
- }
- theora_p++;
- if(theora_p==3)break;
- }
-
- /* The header pages/packets will arrive before anything else we
- care about, or the stream is not obeying spec */
-
- if(ogg_sync_pageout(&oy,&og)>0){
- queue_page(&og); /* demux into the appropriate stream */
- }else{
- int ret=buffer_data(infile,&oy); /* someone needs more data */
- if(ret==0){
- fprintf(stderr,"End of file while searching for codec headers.\n");
- exit(1);
- }
- }
- }
- dump_comments(&tc);
-
- /* and now we have it all. initialize decoders */
- if(theora_p){
- theora_decode_init(&td,&ti);
- fprintf(stderr,"Ogg logical stream %lx is Theora %dx%d %.02f fps video\n"
- "Encoded frame content is %dx%d with %dx%d offset\n",
- to.serialno,ti.width,ti.height,
- (double)ti.fps_numerator/ti.fps_denominator,
- ti.frame_width,ti.frame_height,ti.offset_x,ti.offset_y);
- }else{
- /* tear down the partial theora setup */
- theora_info_clear(&ti);
- theora_comment_clear(&tc);
- }
-
- /* open video */
- if(theora_p)open_video();
-
- if(!raw && outfile){
- fprintf(outfile,"YUV4MPEG2 W%d H%d F%d:%d I%c A%d:%d\n",
- ti.width,ti.height,ti.fps_numerator,ti.fps_denominator,'p',
- ti.aspect_numerator,ti.aspect_denominator);
- }
-
- /* install signal handler */
- signal (SIGINT, sigint_handler);
-
- /* Finally the main decode loop.
-
- It's one Theora packet per frame, so this is pretty
- straightforward if we're not trying to maintain sync
- with other multiplexed streams.
-
- the videobuf_ready flag is used to maintain the input
- buffer in the libogg stream state. If there's no output
- frame available at the end of the decode step, we must
- need more input data. We could simplify this by just
- using the return code on ogg_page_packetout(), but the
- flag system extends easily to the case were you care
- about more than one multiplexed stream (like with audio
- playback). In that case, just maintain a flag for each
- decoder you care about, and pull data when any one of
- them stalls.
-
- videobuf_time holds the presentation time of the currently
- buffered video frame. We ignore this value.
- */
-
- stateflag=0; /* playback has not begun */
- /* queue any remaining pages from data we buffered but that did not
- contain headers */
- while(ogg_sync_pageout(&oy,&og)>0){
- queue_page(&og);
- }
-
- if(fps_only){
- ftime(&start);
- ftime(&last);
- }
-
- while(!got_sigint){
-
- while(theora_p && !videobuf_ready){
- /* theora is one in, one out... */
- if(ogg_stream_packetout(&to,&op)>0){
-
- theora_decode_packetin(&td,&op);
- videobuf_granulepos=td.granulepos;
- videobuf_time=theora_granule_time(&td,videobuf_granulepos);
- videobuf_ready=1;
- frames++;
- if(fps_only)
- ftime(&after);
-
- }else
- break;
- }
-
- if(fps_only && (videobuf_ready || fps_only==2)){
- long ms =
- after.time*1000.+after.millitm-
- (last.time*1000.+last.millitm);
-
- if(ms>500 || fps_only==1 ||
- (feof(infile) && !videobuf_ready)){
- float file_fps = (float)ti.fps_numerator/ti.fps_denominator;
- fps_only=2;
-
- ms = after.time*1000.+after.millitm-
- (start.time*1000.+start.millitm);
-
- fprintf(stderr,"\rframe:%d rate:%.2fx ",
- frames,
- frames*1000./(ms*file_fps));
- memcpy(&last,&after,sizeof(last));
- }
- }
-
- if(!videobuf_ready && feof(infile))break;
-
- if(!videobuf_ready){
- /* no data yet for somebody. Grab another page */
- buffer_data(infile,&oy);
- while(ogg_sync_pageout(&oy,&og)>0){
- queue_page(&og);
- }
- }
- /* dumpvideo frame, and get new one */
- else if(outfile)video_write();
-
- videobuf_ready=0;
- }
-
- /* end of decoder loop -- close everything */
-
- if(theora_p){
- ogg_stream_clear(&to);
- theora_clear(&td);
- theora_comment_clear(&tc);
- theora_info_clear(&ti);
- }
- ogg_sync_clear(&oy);
-
- if(infile && infile!=stdin)fclose(infile);
- if(outfile && outfile!=stdout)fclose(outfile);
-
- fprintf(stderr, "\n\n%d frames\n", frames);
- fprintf(stderr, "\nDone.\n");
-
- return(0);
-
-}
Copied: branches/theora-gumboot/examples/dump_video.c (from rev 16270, branches/theora-thusnelda/examples/dump_video.c)
===================================================================
--- branches/theora-gumboot/examples/dump_video.c (rev 0)
+++ branches/theora-gumboot/examples/dump_video.c 2009-07-13 22:29:40 UTC (rev 16271)
@@ -0,0 +1,496 @@
+/********************************************************************
+ * *
+ * THIS FILE IS PART OF THE OggTheora 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 Theora SOURCE CODE IS COPYRIGHT (C) 2002-2006 *
+ * by the Xiph.Org Foundation http://www.xiph.org/ *
+ * *
+ ********************************************************************
+
+ function: example dumpvid application; dumps Theora streams
+ last mod: $Id: dump_video.c,v 1.2 2004/03/24 19:12:42 derf Exp $
+
+ ********************************************************************/
+
+/* By Mauricio Piacentini (mauricio at xiph.org) */
+/* simply dump decoded YUV data, for verification of theora bitstream */
+
+#if !defined(_REENTRANT)
+#define _REENTRANT
+#endif
+#if !defined(_GNU_SOURCE)
+#define _GNU_SOURCE
+#endif
+#if !defined(_LARGEFILE_SOURCE)
+#define _LARGEFILE_SOURCE
+#endif
+#if !defined(_LARGEFILE64_SOURCE)
+#define _LARGEFILE64_SOURCE
+#endif
+#if !defined(_FILE_OFFSET_BITS)
+#define _FILE_OFFSET_BITS 64
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/timeb.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+/*Yes, yes, we're going to hell.*/
+#if defined(_WIN32)
+#include <io.h>
+#endif
+#include <fcntl.h>
+#include <limits.h>
+#include <math.h>
+#include <signal.h>
+#include "getopt.h"
+#include "theora/theoradec.h"
+
+const char *optstring = "o:rf";
+struct option options [] = {
+ {"output",required_argument,NULL,'o'},
+ {"raw",no_argument, NULL,'r'}, /*Disable YUV4MPEG2 headers:*/
+ {"fps-only",no_argument, NULL, 'f'}, /* Only interested in fps of decode loop */
+ {NULL,0,NULL,0}
+};
+
+/* Helper; just grab some more compressed bitstream and sync it for
+ page extraction */
+int buffer_data(FILE *in,ogg_sync_state *oy){
+ char *buffer=ogg_sync_buffer(oy,4096);
+ int bytes=fread(buffer,1,4096,in);
+ ogg_sync_wrote(oy,bytes);
+ return(bytes);
+}
+
+/* never forget that globals are a one-way ticket to Hell */
+/* Ogg and codec state for demux/decode */
+ogg_sync_state oy;
+ogg_page og;
+ogg_stream_state vo;
+ogg_stream_state to;
+th_info ti;
+th_comment tc;
+th_setup_info *ts;
+th_dec_ctx *td;
+
+int theora_p=0;
+int theora_processing_headers;
+int stateflag=0;
+
+/* single frame video buffering */
+int videobuf_ready=0;
+ogg_int64_t videobuf_granulepos=-1;
+double videobuf_time=0;
+int raw=0;
+
+FILE* outfile = NULL;
+
+int got_sigint=0;
+static void sigint_handler (int signal) {
+ got_sigint = 1;
+}
+
+static th_ycbcr_buffer ycbcr;
+
+static void stripe_decoded(th_ycbcr_buffer _dst,th_ycbcr_buffer _src,
+ int _fragy0,int _fragy_end){
+ int pli;
+ for(pli=0;pli<3;pli++){
+ int yshift;
+ int y_end;
+ int y;
+ yshift=pli!=0&&!(ti.pixel_fmt&2);
+ y_end=_fragy_end<<3-yshift;
+ /*An implemention intending to display this data would need to check the
+ crop rectangle before proceeding.*/
+ for(y=_fragy0<<3-yshift;y<y_end;y++){
+ memcpy(_dst[pli].data+y*_dst[pli].stride,
+ _src[pli].data+y*_src[pli].stride,_src[pli].width);
+ }
+ }
+}
+
+static void open_video(void){
+ th_stripe_callback cb;
+ int pli;
+ /*Here we allocate a buffer so we can use the striped decode feature.
+ There's no real reason to do this in this application, because we want to
+ write to the file top-down, but the frame gets decoded bottom up, so we
+ have to buffer it all anyway.
+ But this illustrates how the API works.*/
+ for(pli=0;pli<3;pli++){
+ int xshift;
+ int yshift;
+ xshift=pli!=0&&!(ti.pixel_fmt&1);
+ yshift=pli!=0&&!(ti.pixel_fmt&2);
+ ycbcr[pli].data=(unsigned char *)malloc(
+ (ti.frame_width>>xshift)*(ti.frame_height>>yshift)*sizeof(char));
+ ycbcr[pli].stride=ti.frame_width>>xshift;
+ ycbcr[pli].width=ti.frame_width>>xshift;
+ ycbcr[pli].height=ti.frame_height>>yshift;
+ }
+ /*Similarly, since ycbcr is a global, there's no real reason to pass it as
+ the context.
+ In a more object-oriented decoder, we could pass the "this" pointer
+ instead (though in C++, platform-dependent calling convention differences
+ prevent us from using a real member function pointer).*/
+ cb.ctx=ycbcr;
+ cb.stripe_decoded=(th_stripe_decoded_func)stripe_decoded;
+ th_decode_ctl(td,TH_DECCTL_SET_STRIPE_CB,&cb,sizeof(cb));
+}
+
+/*Write out the planar YUV frame, uncropped.*/
+static void video_write(void){
+ int pli;
+ int i;
+ /*Uncomment the following to do normal, non-striped decoding.
+ th_ycbcr_buffer ycbcr;
+ th_decode_ycbcr_out(td,ycbcr);*/
+ if(outfile){
+ if(!raw)fprintf(outfile, "FRAME\n");
+ for(pli=0;pli<3;pli++){
+ for(i=0;i<ycbcr[pli].height;i++){
+ fwrite(ycbcr[pli].data+ycbcr[pli].stride*i, 1,
+ ycbcr[pli].width, outfile);
+ }
+ }
+ }
+}
+
+/* dump the theora comment header */
+static int dump_comments(th_comment *_tc){
+ int i;
+ int len;
+ FILE *out;
+ out=stderr;
+ fprintf(out,"Encoded by %s\n",_tc->vendor);
+ if(_tc->comments){
+ fprintf(out,"theora comment header:\n");
+ for(i=0;i<_tc->comments;i++){
+ if(_tc->user_comments[i]){
+ len=_tc->comment_lengths[i]<INT_MAX?_tc->comment_lengths[i]:INT_MAX;
+ fprintf(out,"\t%.*s\n",len,_tc->user_comments[i]);
+ }
+ }
+ }
+ return 0;
+}
+
+/* helper: push a page into the appropriate steam */
+/* this can be done blindly; a stream won't accept a page
+ that doesn't belong to it */
+static int queue_page(ogg_page *page){
+ if(theora_p)ogg_stream_pagein(&to,page);
+ return 0;
+}
+
+static void usage(void){
+ fprintf(stderr,
+ "Usage: dumpvid <file.ogv> > outfile\n"
+ "input is read from stdin if no file is passed on the command line\n"
+ "\n"
+ );
+}
+
+int main(int argc,char *argv[]){
+
+ ogg_packet op;
+
+ int long_option_index;
+ int c;
+
+ struct timeb start;
+ struct timeb after;
+ struct timeb last;
+ int fps_only=0;
+ int frames = 0;
+
+ FILE *infile = stdin;
+ outfile = stdout;
+
+#ifdef _WIN32 /* We need to set stdin/stdout to binary mode on windows. */
+ /* Beware the evil ifdef. We avoid these where we can, but this one we
+ cannot. Don't add any more, you'll probably go to hell if you do. */
+ _setmode( _fileno( stdin ), _O_BINARY );
+ _setmode( _fileno( stdout ), _O_BINARY );
+#endif
+
+ /* Process option arguments. */
+ while((c=getopt_long(argc,argv,optstring,options,&long_option_index))!=EOF){
+ switch(c){
+ case 'o':
+ if(strcmp(optarg,"-")!=0){
+ outfile=fopen(optarg,"wb");
+ if(outfile==NULL){
+ fprintf(stderr,"Unable to open output file '%s'\n", optarg);
+ exit(1);
+ }
+ }else{
+ outfile=stdout;
+ }
+ break;
+
+ case 'r':
+ raw=1;
+ break;
+
+ case 'f':
+ fps_only = 1;
+ outfile = NULL;
+ break;
+
+ default:
+ usage();
+ }
+ }
+ if(optind<argc){
+ infile=fopen(argv[optind],"rb");
+ if(infile==NULL){
+ fprintf(stderr,"Unable to open '%s' for extraction.\n", argv[optind]);
+ exit(1);
+ }
+ if(++optind<argc){
+ usage();
+ exit(1);
+ }
+ }
+ /*Ok, Ogg parsing.
+ The idea here is we have a bitstream that is made up of Ogg pages.
+ The libogg sync layer will find them for us.
+ There may be pages from several logical streams interleaved; we find the
+ first theora stream and ignore any others.
+ Then we pass the pages for our stream to the libogg stream layer which
+ assembles our original set of packets out of them.
+ It's the packets that libtheora actually knows how to handle.*/
+
+ /* start up Ogg stream synchronization layer */
+ ogg_sync_init(&oy);
+
+ /* init supporting Theora structures needed in header parsing */
+ th_comment_init(&tc);
+ th_info_init(&ti);
+
+ /*Ogg file open; parse the headers.
+ Theora (like Vorbis) depends on some initial header packets for decoder
+ setup and initialization.
+ We retrieve these first before entering the main decode loop.*/
+
+ /* Only interested in Theora streams */
+ while(!stateflag){
+ int ret=buffer_data(infile,&oy);
+ if(ret==0)break;
+ while(ogg_sync_pageout(&oy,&og)>0){
+ ogg_stream_state test;
+
+ /* is this a mandated initial header? If not, stop parsing */
+ if(!ogg_page_bos(&og)){
+ /* don't leak the page; get it into the appropriate stream */
+ queue_page(&og);
+ stateflag=1;
+ break;
+ }
+
+ ogg_stream_init(&test,ogg_page_serialno(&og));
+ ogg_stream_pagein(&test,&og);
+ ogg_stream_packetpeek(&test,&op);
+
+ /* identify the codec: try theora */
+ if(!theora_p && (theora_processing_headers=
+ th_decode_headerin(&ti,&tc,&ts,&op))>=0){
+ /* it is theora -- save this stream state */
+ memcpy(&to,&test,sizeof(test));
+ theora_p=1;
+ /*Advance past the successfully processed header.*/
+ if(theora_processing_headers)ogg_stream_packetout(&to,NULL);
+ }else{
+ /* whatever it is, we don't care about it */
+ ogg_stream_clear(&test);
+ }
+ }
+ /* fall through to non-bos page parsing */
+ }
+
+ /* we're expecting more header packets. */
+ while(theora_p && theora_processing_headers){
+ int ret;
+
+ /* look for further theora headers */
+ while(theora_processing_headers&&(ret=ogg_stream_packetpeek(&to,&op))){
+ if(ret<0)continue;
+ theora_processing_headers=th_decode_headerin(&ti,&tc,&ts,&op);
+ if(theora_processing_headers<0){
+ fprintf(stderr,"Error parsing Theora stream headers; "
+ "corrupt stream?\n");
+ exit(1);
+ }
+ else if(theora_processing_headers>0){
+ /*Advance past the successfully processed header.*/
+ ogg_stream_packetout(&to,NULL);
+ }
+ theora_p++;
+ }
+
+ /*Stop now so we don't fail if there aren't enough pages in a short
+ stream.*/
+ if(!(theora_p && theora_processing_headers))break;
+
+ /* The header pages/packets will arrive before anything else we
+ care about, or the stream is not obeying spec */
+
+ if(ogg_sync_pageout(&oy,&og)>0){
+ queue_page(&og); /* demux into the appropriate stream */
+ }else{
+ int ret=buffer_data(infile,&oy); /* someone needs more data */
+ if(ret==0){
+ fprintf(stderr,"End of file while searching for codec headers.\n");
+ exit(1);
+ }
+ }
+ }
+
+ /* and now we have it all. initialize decoders */
+ if(theora_p){
+ dump_comments(&tc);
+ td=th_decode_alloc(&ti,ts);
+ fprintf(stderr,"Ogg logical stream %lx is Theora %dx%d %.02f fps video\n"
+ "Encoded frame content is %dx%d with %dx%d offset\n",
+ to.serialno,ti.frame_width,ti.frame_height,
+ (double)ti.fps_numerator/ti.fps_denominator,
+ ti.pic_width,ti.pic_height,ti.pic_x,ti.pic_y);
+ }else{
+ /* tear down the partial theora setup */
+ th_info_clear(&ti);
+ th_comment_clear(&tc);
+ }
+ /*Either way, we're done with the codec setup data.*/
+ th_setup_free(ts);
+
+ /* open video */
+ if(theora_p)open_video();
+
+ if(!raw && outfile){
+ static const char *CHROMA_TYPES[4]={"420jpeg",NULL,"422","444"};
+ if(ti.pixel_fmt>=4||ti.pixel_fmt==TH_PF_RSVD){
+ fprintf(stderr,"Unknown pixel format: %i\n",ti.pixel_fmt);
+ exit(1);
+ }
+ fprintf(outfile,"YUV4MPEG2 C%s W%d H%d F%d:%d I%c A%d:%d\n",
+ CHROMA_TYPES[ti.pixel_fmt],ti.frame_width,ti.frame_height,
+ ti.fps_numerator,ti.fps_denominator,'p',
+ ti.aspect_numerator,ti.aspect_denominator);
+ }
+
+ /* install signal handler */
+ signal (SIGINT, sigint_handler);
+
+ /*Finally the main decode loop.
+
+ It's one Theora packet per frame, so this is pretty straightforward if
+ we're not trying to maintain sync with other multiplexed streams.
+
+ The videobuf_ready flag is used to maintain the input buffer in the libogg
+ stream state.
+ If there's no output frame available at the end of the decode step, we must
+ need more input data.
+ We could simplify this by just using the return code on
+ ogg_page_packetout(), but the flag system extends easily to the case where
+ you care about more than one multiplexed stream (like with audio
+ playback).
+ In that case, just maintain a flag for each decoder you care about, and
+ pull data when any one of them stalls.
+
+ videobuf_time holds the presentation time of the currently buffered video
+ frame.
+ We ignore this value.*/
+
+ stateflag=0; /* playback has not begun */
+ /* queue any remaining pages from data we buffered but that did not
+ contain headers */
+ while(ogg_sync_pageout(&oy,&og)>0){
+ queue_page(&og);
+ }
+
+ if(fps_only){
+ ftime(&start);
+ ftime(&last);
+ }
+
+ while(!got_sigint){
+
+ while(theora_p && !videobuf_ready){
+ /* theora is one in, one out... */
+ if(ogg_stream_packetout(&to,&op)>0){
+
+ if(th_decode_packetin(td,&op,&videobuf_granulepos)>=0){
+ videobuf_time=th_granule_time(td,videobuf_granulepos);
+ videobuf_ready=1;
+ frames++;
+ if(fps_only)
+ ftime(&after);
+ }
+
+ }else
+ break;
+ }
+
+ if(fps_only && (videobuf_ready || fps_only==2)){
+ long ms =
+ after.time*1000.+after.millitm-
+ (last.time*1000.+last.millitm);
+
+ if(ms>500 || fps_only==1 ||
+ (feof(infile) && !videobuf_ready)){
+ float file_fps = (float)ti.fps_numerator/ti.fps_denominator;
+ fps_only=2;
+
+ ms = after.time*1000.+after.millitm-
+ (start.time*1000.+start.millitm);
+
+ fprintf(stderr,"\rframe:%d rate:%.2fx ",
+ frames,
+ frames*1000./(ms*file_fps));
+ memcpy(&last,&after,sizeof(last));
+ }
+ }
+
+ if(!videobuf_ready && feof(infile))break;
+
+ if(!videobuf_ready){
+ /* no data yet for somebody. Grab another page */
+ buffer_data(infile,&oy);
+ while(ogg_sync_pageout(&oy,&og)>0){
+ queue_page(&og);
+ }
+ }
+ /* dumpvideo frame, and get new one */
+ else if(outfile)video_write();
+
+ videobuf_ready=0;
+ }
+
+ /* end of decoder loop -- close everything */
+
+ if(theora_p){
+ ogg_stream_clear(&to);
+ th_decode_free(td);
+ th_comment_clear(&tc);
+ th_info_clear(&ti);
+ }
+ ogg_sync_clear(&oy);
+
+ if(infile && infile!=stdin)fclose(infile);
+ if(outfile && outfile!=stdout)fclose(outfile);
+
+ fprintf(stderr, "\n\n%d frames\n", frames);
+ fprintf(stderr, "\nDone.\n");
+
+ return(0);
+
+}
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