theora video decoder, based on patch by David Kuehling <dvdkhlng@gmx.de>

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10095 b3059339-0415-0410-9bf9-f77b7e298cf2
2025-03-30 23:38:10 +00:00 · 2003-05-11 18:26:48 +00:00 · 2003-05-11 18:26:48 +00:00 · ffc479f746
commit ffc479f746
parent fd63a6fe68
1 changed files with 157 additions and 0 deletions
--- a/libmpcodecs/vd_theora.c
+++ b/libmpcodecs/vd_theora.c
@ -0,0 +1,157 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <assert.h>
+
+#include "config.h"
+#include "mp_msg.h"
+#include "help_mp.h"
+
+#ifdef HAVE_OGGTHEORA
+
+#include "vd_internal.h"
+
+static vd_info_t info = {
+   "Theora/VP3",
+   "theora",
+   "David Kuehling",
+   "www.theora.org",
+   "Theora project's VP3 codec"
+};
+
+LIBVD_EXTERN(theora)
+
+#include <theora/theora.h>
+
+// to set/get/query special features/parameters
+static int control(sh_video_t *sh,int cmd,void* arg,...){
+    return CONTROL_UNKNOWN;
+}
+
+typedef struct theora_struct_st {
+    theora_state st;
+    theora_info inf;
+} theora_struct_t;
+
+/*
+ * init driver
+ */
+static int init(sh_video_t *sh){
+    theora_struct_t *context = NULL;
+    int failed = 1;
+    int errorCode = 0;
+    ogg_packet op;
+
+    /* check whether video output format is supported */
+    switch(sh->codec->outfmt[sh->outfmtidx])
+    {
+       case IMGFMT_YV12: /* well, this should work... */ break;
+       default: 
+	  mp_msg (MSGT_DECVIDEO,MSGL_ERR,"Unsupported out_fmt: 0x%X\n",
+		  sh->codec->outfmt[sh->outfmtidx]);
+	  return 0;
+    }
+
+    /* this is not a loop, just a context, from which we can break on error */
+    do
+    {
+       context = (theora_struct_t *)calloc (sizeof (theora_struct_t), 1);
+       sh->context = context;
+       if (!context)
+	  break;
+       
+       /* read initial header */
+       op.bytes = ds_get_packet (sh->ds,&op.packet);
+       op.b_o_s  = 1;
+       if((errorCode = theora_decode_header (&context->inf, &op))) {
+	  mp_msg(MSGT_DECAUDIO,MSGL_ERR, 
+		 "Broken Theora header; erroroCode=%i!\n", errorCode);
+	  break;
+       }
+
+       errorCode = theora_decode_init (&context->st, &context->inf);
+       if (errorCode)
+       {
+	  mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Theora decode init failed: %i \n",
+		 errorCode);
+	  break;
+       }
+       failed = 0;
+    } while (0);
+
+    if (failed)
+    {
+       if (context)
+       {
+	  free (context);
+	  sh->context = NULL;
+       }
+       return 0;
+    }
+
+    mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: Theora video init ok!\n");
+
+    return mpcodecs_config_vo (sh,sh->disp_w,sh->disp_h,IMGFMT_YV12);
+}
+
+/* 
+ * uninit driver
+ */
+static void uninit(sh_video_t *sh)
+{
+   theora_struct_t *context = (theora_struct_t *)sh->context;
+
+   if (context)
+   {
+      theora_clear (&context->st);
+      free (context);
+   }
+}
+
+/*
+ * decode frame
+ */
+static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags) 
+{
+   theora_struct_t *context = (theora_struct_t *)sh->context;
+   int errorCode = 0;
+   ogg_packet op;
+   yuv_buffer yuv;
+   mp_image_t* mpi;
+   int i;
+
+   bzero (&op, sizeof (op));
+   op.bytes = len;
+   op.packet = data;
+   op.granulepos = -1;
+
+   errorCode = theora_decode_packetin (&context->st, &op);
+   if (errorCode)
+   {
+      mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Theora decode packetin failed: %i \n",
+	     errorCode);
+      return NULL;
+   }
+
+   errorCode = theora_decode_YUVout (&context->st, &yuv);
+   if (errorCode)
+   {
+      mp_msg(MSGT_DEMUX,MSGL_ERR,"Theora decode YUVout failed: %i \n",
+	     errorCode);
+      return 0;
+   }
+
+    mpi = mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, 0, sh->disp_w, sh->disp_h);
+    if(!mpi) return NULL;
+    
+    mpi->planes[0]=yuv.y;
+    mpi->stride[0]=yuv.y_stride;
+    mpi->planes[1]=yuv.u;
+    mpi->stride[1]=yuv.uv_stride;
+    mpi->planes[2]=yuv.v;
+    mpi->stride[2]=yuv.uv_stride;
+
+    return mpi;
+}
+
+#endif