aboutsummaryrefslogtreecommitdiffstats
path: root/distrib/sdl-1.2.15/src/video/directfb/SDL_DirectFB_yuv.c
blob: fd0cef1180e170d9c7fde5054dd2d0cf67aa9a86 (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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2012 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

/* This is the DirectFB implementation of YUV video overlays */

#include "SDL_video.h"
#include "SDL_DirectFB_yuv.h"
#include "../SDL_yuvfuncs.h"


/* The functions used to manipulate software video overlays */
static struct private_yuvhwfuncs directfb_yuvfuncs = {
  DirectFB_LockYUVOverlay,
  DirectFB_UnlockYUVOverlay,
  DirectFB_DisplayYUVOverlay,
  DirectFB_FreeYUVOverlay
};

struct private_yuvhwdata {
  DFBDisplayLayerID      layer_id;

  IDirectFBDisplayLayer *layer;
  IDirectFBSurface      *surface;

  /* These are just so we don't have to allocate them separately */
  Uint16 pitches[3];
  Uint8 *planes[3];
};

static DFBEnumerationResult
enum_layers_callback( DFBDisplayLayerID            id,
                      DFBDisplayLayerDescription   desc,
                      void                        *data )
{
  struct private_yuvhwdata *hwdata = (struct private_yuvhwdata *) data;

  /* we don't want the primary */
  if (id == DLID_PRIMARY)
    return DFENUM_OK;

  /* take the one with a surface for video */
  if ((desc.caps & DLCAPS_SURFACE) && (desc.type & DLTF_VIDEO))
    {
      hwdata->layer_id = id;

      return DFENUM_CANCEL;
    }

  return DFENUM_OK;
}


static DFBResult CreateYUVSurface(_THIS, struct private_yuvhwdata *hwdata,
                                  int width, int height, Uint32 format)
{
  DFBResult              ret;
  IDirectFB             *dfb = HIDDEN->dfb;
  IDirectFBDisplayLayer *layer;
  DFBDisplayLayerConfig  conf;

  ret = dfb->EnumDisplayLayers (dfb, enum_layers_callback, hwdata);
  if (ret)
    {
      SetDirectFBerror("IDirectFB::EnumDisplayLayers", ret);
      return ret;
    }

  if (!hwdata->layer_id)
    return DFB_UNSUPPORTED;

  ret = dfb->GetDisplayLayer (dfb, hwdata->layer_id, &layer);
  if (ret)
    {
      SetDirectFBerror("IDirectFB::GetDisplayLayer", ret);
      return ret;
    }

  conf.flags = DLCONF_WIDTH | DLCONF_HEIGHT | DLCONF_PIXELFORMAT;
  conf.width = width;
  conf.height = height;

  switch (format)
    {
    case SDL_YV12_OVERLAY:
      conf.pixelformat = DSPF_YV12;
      break;
    case SDL_IYUV_OVERLAY:
      conf.pixelformat = DSPF_I420;
      break;
    case SDL_YUY2_OVERLAY:
      conf.pixelformat = DSPF_YUY2;
      break;
    case SDL_UYVY_OVERLAY:
      conf.pixelformat = DSPF_UYVY;
      break;
    default:
      fprintf (stderr, "SDL_DirectFB: Unsupported YUV format (0x%08x)!\n", format);
      break;
    }

  /* Need to set coop level or newer DirectFB versions will fail here. */
  ret = layer->SetCooperativeLevel (layer, DLSCL_ADMINISTRATIVE);
  if (ret)
    {
      SetDirectFBerror("IDirectFBDisplayLayer::SetCooperativeLevel() failed", ret);
      layer->Release (layer);
      return ret;
    }

  ret = layer->SetConfiguration (layer, &conf);
  if (ret)
    {
      SetDirectFBerror("IDirectFBDisplayLayer::SetConfiguration", ret);
      layer->Release (layer);
      return ret;
    }

  ret = layer->GetSurface (layer, &hwdata->surface);
  if (ret)
    {
      SetDirectFBerror("IDirectFBDisplayLayer::GetSurface", ret);
      layer->Release (layer);
      return ret;
    }

  hwdata->layer = layer;

  return DFB_OK;
}

SDL_Overlay *DirectFB_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
{
  SDL_Overlay *overlay;
  struct private_yuvhwdata *hwdata;

  /* Create the overlay structure */
  overlay = SDL_calloc (1, sizeof(SDL_Overlay));
  if (!overlay)
    {
      SDL_OutOfMemory();
      return NULL;
    }
	
  /* Fill in the basic members */
  overlay->format = format;
  overlay->w = width;
  overlay->h = height;

  /* Set up the YUV surface function structure */
  overlay->hwfuncs = &directfb_yuvfuncs;

  /* Create the pixel data and lookup tables */
  hwdata = SDL_calloc(1, sizeof(struct private_yuvhwdata));
  overlay->hwdata = hwdata;
  if (!hwdata)
    {
      SDL_OutOfMemory();
      SDL_FreeYUVOverlay (overlay);
      return NULL;
    }

  if (CreateYUVSurface (this, hwdata, width, height, format))
    {
      SDL_FreeYUVOverlay (overlay);
      return NULL;
    }

  overlay->hw_overlay = 1;

  /* Set up the plane pointers */
  overlay->pitches = hwdata->pitches;
  overlay->pixels = hwdata->planes;
  switch (format)
    {
    case SDL_YV12_OVERLAY:
    case SDL_IYUV_OVERLAY:
      overlay->planes = 3;
      break;
    default:
      overlay->planes = 1;
      break;
    }

  /* We're all done.. */
  return overlay;
}

int DirectFB_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
{
  DFBResult         ret;
  void             *data;
  int               pitch;
  IDirectFBSurface *surface = overlay->hwdata->surface;

  ret = surface->Lock (surface, DSLF_READ | DSLF_WRITE, &data, &pitch);
  if (ret)
    {
      SetDirectFBerror("IDirectFBSurface::Lock", ret);
      return -1;
    }

  /* Find the pitch and offset values for the overlay */
  overlay->pitches[0] = (Uint16) pitch;
  overlay->pixels[0]  = (Uint8*) data;

  switch (overlay->format)
    {
    case SDL_YV12_OVERLAY:
    case SDL_IYUV_OVERLAY:
      /* Add the two extra planes */
      overlay->pitches[1] = overlay->pitches[0] / 2;
      overlay->pitches[2] = overlay->pitches[0] / 2;
      overlay->pixels[1]  = overlay->pixels[0] + overlay->pitches[0] * overlay->h;
      overlay->pixels[2]  = overlay->pixels[1] + overlay->pitches[1] * overlay->h / 2;
      break;
    default:
      /* Only one plane, no worries */
      break;
    }

  return 0;
}

void DirectFB_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
{
  IDirectFBSurface *surface = overlay->hwdata->surface;

  overlay->pixels[0] = overlay->pixels[1] = overlay->pixels[2] = NULL;

  surface->Unlock (surface);
}

int DirectFB_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *src, SDL_Rect *dst)
{
  DFBResult              ret;
  DFBDisplayLayerConfig  conf;
  IDirectFBDisplayLayer *primary = HIDDEN->layer;
  IDirectFBDisplayLayer *layer   = overlay->hwdata->layer;

  primary->GetConfiguration (primary, &conf);

  ret = layer->SetScreenLocation (layer,
                                  dst->x / (float) conf.width, dst->y / (float) conf.height,
                                  dst->w / (float) conf.width, dst->h / (float) conf.height );
  if (ret)
    {
      SetDirectFBerror("IDirectFBDisplayLayer::SetScreenLocation", ret);
      return -1;
    }

  return 0;
}

void DirectFB_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
{
  struct private_yuvhwdata *hwdata;

  hwdata = overlay->hwdata;
  if (hwdata)
    {
      if (hwdata->surface)
        hwdata->surface->Release (hwdata->surface);

      if (hwdata->layer)
        hwdata->layer->Release (hwdata->layer);

      free (hwdata);
    }
}