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#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#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>
#define THEORA_NUM_HEADER_PACKETS 3
// to set/get/query special features/parameters
static int control(sh_video_t *sh,int cmd,void* arg,...){
switch(cmd) {
case VDCTRL_QUERY_FORMAT:
if ((*((int*)arg)) == IMGFMT_YV12)
return CONTROL_TRUE;
return CONTROL_FALSE;
}
return CONTROL_UNKNOWN;
}
typedef struct theora_struct_st {
theora_state st;
theora_comment cc;
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;
int i;
/* 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 = calloc (sizeof (theora_struct_t), 1);
sh->context = context;
if (!context)
break;
theora_info_init(&context->inf);
theora_comment_init(&context->cc);
/* Read all header packets, pass them to theora_decode_header. */
for (i = 0; i < THEORA_NUM_HEADER_PACKETS; i++)
{
op.bytes = ds_get_packet (sh->ds, &op.packet);
op.b_o_s = 1;
if ( (errorCode = theora_decode_header (&context->inf, &context->cc, &op)) )
{
mp_msg(MSGT_DECAUDIO, MSGL_ERR, "Broken Theora header; errorCode=%i!\n", errorCode);
break;
}
}
if (errorCode)
break;
/* now init codec */
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;
}
if(sh->aspect==0.0 && context->inf.aspect_denominator!=0)
{
sh->aspect = (float)(context->inf.aspect_numerator * context->inf.frame_width)/
(context->inf.aspect_denominator * context->inf.frame_height);
}
mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: Theora video init ok!\n");
return mpcodecs_config_vo (sh,context->inf.frame_width,context->inf.frame_height,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;
memset (&op, 0, 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, yuv.y_width, yuv.y_height);
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;
}
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