summaryrefslogtreecommitdiff
path: root/gst-libs/gst/vaapi/gstvaapisubpicture.c
blob: 56db3784c7dda800e39d03440a058905a841a316 (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
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
/*
 *  gstvaapisubpicture.c - VA subpicture abstraction
 *
 *  Copyright (C) 2010-2011 Splitted-Desktop Systems
 *    Author: Gwenole Beauchesne <gwenole.beauchesne@splitted-desktop.com>
 *  Copyright (C) 2011-2013 Intel Corporation
 *    Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
 *
 *  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 Street, Fifth Floor,
 *  Boston, MA 02110-1301 USA
 */

/**
 * SECTION:gstvaapisubpicture
 * @short_description: VA subpicture abstraction
 */

#include "sysdeps.h"
#include "gstvaapicompat.h"
#include "gstvaapiutils.h"
#include "gstvaapisubpicture.h"
#include "gstvaapiobject_priv.h"
#include "gstvaapiimage_priv.h"

#define DEBUG 1
#include "gstvaapidebug.h"

typedef struct _GstVaapiSubpictureClass GstVaapiSubpictureClass;

/**
 * GstVaapiSubpicture:
 *
 * A VA subpicture wrapper
 */
struct _GstVaapiSubpicture
{
  /*< private > */
  GstVaapiObject parent_instance;

  GstVaapiImage *image;
  guint flags;
  gfloat global_alpha;
};

/**
 * GstVaapiSubpictureClass:
 *
 * A VA subpicture wrapper class
 */
struct _GstVaapiSubpictureClass
{
  /*< private > */
  GstVaapiObjectClass parent_class;
};

static void
gst_vaapi_subpicture_destroy (GstVaapiSubpicture * subpicture)
{
  GstVaapiDisplay *const display = GST_VAAPI_OBJECT_DISPLAY (subpicture);
  VASubpictureID subpicture_id;
  VAStatus status;

  subpicture_id = GST_VAAPI_OBJECT_ID (subpicture);
  GST_DEBUG ("subpicture %" GST_VAAPI_ID_FORMAT,
      GST_VAAPI_ID_ARGS (subpicture_id));

  if (subpicture_id != VA_INVALID_ID) {
    if (display) {
      GST_VAAPI_DISPLAY_LOCK (display);
      status = vaDestroySubpicture (GST_VAAPI_DISPLAY_VADISPLAY (display),
          subpicture_id);
      GST_VAAPI_DISPLAY_UNLOCK (display);
      if (!vaapi_check_status (status, "vaDestroySubpicture()"))
        GST_WARNING ("failed to destroy subpicture %" GST_VAAPI_ID_FORMAT,
            GST_VAAPI_ID_ARGS (subpicture_id));
    }
    GST_VAAPI_OBJECT_ID (subpicture) = VA_INVALID_ID;
  }
  gst_mini_object_replace ((GstMiniObject **) & subpicture->image, NULL);
}

static gboolean
gst_vaapi_subpicture_create (GstVaapiSubpicture * subpicture,
    GstVaapiImage * image)
{
  GstVaapiDisplay *const display = GST_VAAPI_OBJECT_DISPLAY (subpicture);
  VASubpictureID subpicture_id;
  VAStatus status;

  GST_VAAPI_DISPLAY_LOCK (display);
  status = vaCreateSubpicture (GST_VAAPI_DISPLAY_VADISPLAY (display),
      GST_VAAPI_IMAGE_ID (image), &subpicture_id);
  GST_VAAPI_DISPLAY_UNLOCK (display);
  if (!vaapi_check_status (status, "vaCreateSubpicture()"))
    return FALSE;

  GST_DEBUG ("subpicture %" GST_VAAPI_ID_FORMAT,
      GST_VAAPI_ID_ARGS (subpicture_id));
  GST_VAAPI_OBJECT_ID (subpicture) = subpicture_id;
  subpicture->image =
      (GstVaapiImage *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (image));
  return TRUE;
}

#define gst_vaapi_subpicture_finalize gst_vaapi_subpicture_destroy
GST_VAAPI_OBJECT_DEFINE_CLASS (GstVaapiSubpicture, gst_vaapi_subpicture)

/**
 * gst_vaapi_subpicture_new:
 * @image: a #GstVaapiImage
 * @flags: #GstVaapiSubpictureFlags, or zero
 *
 * Creates a new #GstVaapiSubpicture with @image as source pixels. The
 * newly created object holds a reference on @image.
 *
 * Return value: the newly allocated #GstVaapiSubpicture object
 */
     GstVaapiSubpicture *gst_vaapi_subpicture_new (GstVaapiImage * image,
    guint flags)
{
  GstVaapiSubpicture *subpicture;
  GstVaapiDisplay *display;
  GstVideoFormat format;
  guint va_flags;

  g_return_val_if_fail (image != NULL, NULL);

  GST_DEBUG ("create from image %" GST_VAAPI_ID_FORMAT,
      GST_VAAPI_ID_ARGS (GST_VAAPI_IMAGE_ID (image)));

  display = GST_VAAPI_IMAGE_DISPLAY (image);
  format = GST_VAAPI_IMAGE_FORMAT (image);
  if (!gst_vaapi_display_has_subpicture_format (display, format, &va_flags))
    return NULL;
  if (flags & ~va_flags)
    return NULL;

  subpicture = gst_vaapi_object_new (gst_vaapi_subpicture_class (), display);
  if (!subpicture)
    return NULL;

  subpicture->global_alpha = 1.0f;
  if (!gst_vaapi_subpicture_set_image (subpicture, image))
    goto error;
  return subpicture;

  /* ERRORS */
error:
  {
    gst_vaapi_object_unref (subpicture);
    return NULL;
  }
}

/**
 * gst_vaapi_subpicture_new_from_overlay_rectangle:
 * @display: a #GstVaapiDisplay
 * @rect: a #GstVideoOverlayRectangle
 *
 * Helper function that creates a new #GstVaapiSubpicture from a
 * #GstVideoOverlayRectangle. A new #GstVaapiImage is also created
 * along the way and attached to the resulting subpicture. The
 * subpicture holds a unique reference to the underlying image.
 *
 * Return value: the newly allocated #GstVaapiSubpicture object
 */
GstVaapiSubpicture *
gst_vaapi_subpicture_new_from_overlay_rectangle (GstVaapiDisplay * display,
    GstVideoOverlayRectangle * rect)
{
  GstVaapiSubpicture *subpicture;
  GstVideoFormat format;
  GstVaapiImage *image;
  GstVaapiImageRaw raw_image;
  GstBuffer *buffer;
  guint8 *data;
  gfloat global_alpha;
  guint width, height, stride;
  guint hw_flags, flags;
  GstVideoMeta *vmeta;
  GstMapInfo map_info;

  g_return_val_if_fail (GST_IS_VIDEO_OVERLAY_RECTANGLE (rect), NULL);

  /* XXX: use gst_vaapi_image_format_from_video() */
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
  format = GST_VIDEO_FORMAT_BGRA;
#else
  format = GST_VIDEO_FORMAT_ARGB;
#endif
  if (!gst_vaapi_display_has_subpicture_format (display, format, &hw_flags))
    return NULL;

  flags =
      hw_flags &
      from_GstVideoOverlayFormatFlags (gst_video_overlay_rectangle_get_flags
      (rect));

  buffer = gst_video_overlay_rectangle_get_pixels_unscaled_argb (rect,
      to_GstVideoOverlayFormatFlags (flags));
  if (!buffer)
    return NULL;

  vmeta = gst_buffer_get_video_meta (buffer);
  if (!vmeta)
    return NULL;
  width = vmeta->width;
  height = vmeta->height;

  if (!gst_video_meta_map (vmeta, 0, &map_info, (gpointer *) & data,
          (gint *) & stride, GST_MAP_READ))
    return NULL;

  image = gst_vaapi_image_new (display, format, width, height);
  if (!image)
    return NULL;

  raw_image.format = format;
  raw_image.width = width;
  raw_image.height = height;
  raw_image.num_planes = 1;
  raw_image.pixels[0] = data;
  raw_image.stride[0] = stride;
  if (!gst_vaapi_image_update_from_raw (image, &raw_image, NULL)) {
    GST_WARNING ("could not update VA image with subtitle data");
    gst_vaapi_object_unref (image);
    return NULL;
  }

  subpicture = gst_vaapi_subpicture_new (image, flags);
  gst_vaapi_object_unref (image);
  gst_video_meta_unmap (vmeta, 0, &map_info);
  if (!subpicture)
    return NULL;

  if (flags & GST_VAAPI_SUBPICTURE_FLAG_GLOBAL_ALPHA) {
    global_alpha = gst_video_overlay_rectangle_get_global_alpha (rect);
    if (!gst_vaapi_subpicture_set_global_alpha (subpicture, global_alpha))
      return NULL;
  }
  return subpicture;
}

/**
 * gst_vaapi_subpicture_get_id:
 * @subpicture: a #GstVaapiSubpicture
 *
 * Returns the underlying VASubpictureID of the @subpicture.
 *
 * Return value: the underlying VA subpicture id
 */
GstVaapiID
gst_vaapi_subpicture_get_id (GstVaapiSubpicture * subpicture)
{
  g_return_val_if_fail (subpicture != NULL, VA_INVALID_ID);

  return GST_VAAPI_OBJECT_ID (subpicture);
}

/**
 * gst_vaapi_subpicture_get_flags:
 * @subpicture: a #GstVaapiSubpicture
 *
 * Returns the @subpicture flags.
 *
 * Return value: the @subpicture flags
 */
guint
gst_vaapi_subpicture_get_flags (GstVaapiSubpicture * subpicture)
{
  g_return_val_if_fail (subpicture != NULL, 0);

  return subpicture->flags;
}

/**
 * gst_vaapi_subpicture_get_image:
 * @subpicture: a #GstVaapiSubpicture
 *
 * Returns the #GstVaapiImage this @subpicture is bound to.
 *
 * Return value: the #GstVaapiImage this @subpicture is bound to
 */
GstVaapiImage *
gst_vaapi_subpicture_get_image (GstVaapiSubpicture * subpicture)
{
  g_return_val_if_fail (subpicture != NULL, NULL);

  return subpicture->image;
}

/**
 * gst_vaapi_subpicture_set_image:
 * @subpicture: a #GstVaapiSubpicture
 * @image: a #GstVaapiImage
 *
 * Binds a new #GstVaapiImage to the @subpicture. The reference to the
 * previous image is released and a new one is acquired on @image.
 *
 * Return value: %TRUE on success
 */
gboolean
gst_vaapi_subpicture_set_image (GstVaapiSubpicture * subpicture,
    GstVaapiImage * image)
{
  g_return_val_if_fail (subpicture != NULL, FALSE);
  g_return_val_if_fail (image != NULL, FALSE);

  gst_vaapi_subpicture_destroy (subpicture);
  return gst_vaapi_subpicture_create (subpicture, image);
}

/**
 * gst_vaapi_subpicture_get_global_alpha:
 * @subpicture: a #GstVaapiSubpicture
 *
 * Returns the value of global_alpha, set for this @subpicture.
 *
 * Return value: the global_alpha value of this @subpicture
 */
gfloat
gst_vaapi_subpicture_get_global_alpha (GstVaapiSubpicture * subpicture)
{
  g_return_val_if_fail (subpicture != NULL, 1.0);

  return subpicture->global_alpha;
}

/**
 * gst_vaapi_subpicture_set_global_alpha:
 * @subpicture: a #GstVaapiSubpicture
 * @global_alpha: value for global-alpha (range: 0.0 to 1.0, inclusive)
 *
 * Sets the global_alpha value of @subpicture. This function calls
 * vaSetSubpictureGlobalAlpha() if the format of @subpicture, i.e.
 * the current VA driver supports it.
 *
 * Return value: %TRUE if global_alpha could be set, %FALSE otherwise
 */
gboolean
gst_vaapi_subpicture_set_global_alpha (GstVaapiSubpicture * subpicture,
    gfloat global_alpha)
{
  GstVaapiDisplay *display;
  VAStatus status;

  g_return_val_if_fail (subpicture != NULL, FALSE);

  if (!(subpicture->flags & GST_VAAPI_SUBPICTURE_FLAG_GLOBAL_ALPHA))
    return FALSE;

  if (subpicture->global_alpha == global_alpha)
    return TRUE;

  display = GST_VAAPI_OBJECT_DISPLAY (subpicture);

  GST_VAAPI_DISPLAY_LOCK (display);
  status = vaSetSubpictureGlobalAlpha (GST_VAAPI_DISPLAY_VADISPLAY (display),
      GST_VAAPI_OBJECT_ID (subpicture), global_alpha);
  GST_VAAPI_DISPLAY_UNLOCK (display);
  if (!vaapi_check_status (status, "vaSetSubpictureGlobalAlpha()"))
    return FALSE;

  subpicture->global_alpha = global_alpha;
  return TRUE;
}