aboutsummaryrefslogtreecommitdiffhomepage
path: root/libmpcodecs/vd_theora.c
blob: 1f12ca0fc0ab357ad2e3c65fbfff799f0329299f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
#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>

#define THEORA_NUM_HEADER_PACKETS 3

// 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_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 = (theora_struct_t *)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;
    }

    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