modules/codec/vt_utils.h

   1 /*****************************************************************************
   2  * vt_utils.h: videotoolbox/cvpx utility functions
   3  *****************************************************************************
   4  * Copyright (C) 2017 VLC authors, VideoLAN and VideoLabs
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifndef VLC_CODEC_VTUTILS_H_
  22 #define VLC_CODEC_VTUTILS_H_
  23
  24 #include <VideoToolbox/VideoToolbox.h>
  25 #include <vlc_picture.h>
  26
  27 CFMutableDictionaryRef cfdict_create(CFIndex capacity);
  28
  29 void cfdict_set_int32(CFMutableDictionaryRef dict, CFStringRef key, int value);
  30
  31 /*
  32  * Attach a cvpx buffer to a picture
  33  *
  34  * The cvpx ref will be released when the picture is released
  35  * @return VLC_SUCCESS or VLC_ENOMEM
  36  */
  37 int cvpxpic_attach(picture_t *p_pic, CVPixelBufferRef cvpx);
  38
  39 int cvpxpic_attach_with_cb(picture_t *p_pic, CVPixelBufferRef cvpx,
  40                            void (*on_released_cb)(CVPixelBufferRef, void *, unsigned nb_fields),
  41                            void *on_released_data);
  42
  43 /*
  44  * Get the cvpx buffer attached to a picture
  45  */
  46 CVPixelBufferRef cvpxpic_get_ref(picture_t *pic);
  47
  48 /*
  49  * Create a picture mapped to a cvpx buffer
  50  *
  51  * @param fmt i_chroma must be VLC_CODEC_UYVY, VLC_CODEC_NV12 or VLC_CODEC_I420
  52  * @param cvpx buffer to map
  53  * @param readonly true to map read-only, false otherwise
  54  * @return a valid picture, call picture_Release() or cvpxpic_unmap() to free
  55  * the picture and unmap the cvpx buffer.
  56  */
  57 picture_t *cvpxpic_create_mapped(const video_format_t *fmt,
  58                                  CVPixelBufferRef cvpx, bool readonly);
  59
  60 /*
  61  * Create a picture attached to an unmapped cvpx buffer
  62  *
  63  * @param mapped_pic must be a picture created with cvpxpic_create_mapped()
  64  * @return a valid picture, the pic chroma will one of VLC_CODEC_CVPX_* chromas
  65  */
  66 picture_t *cvpxpic_unmap(picture_t *mapped_pic);
  67
  68 /*
  69  * Create a cvpx pool
  70  *
  71  * @param fmt i_chroma must be one of VLC_CODEC_CVPX_* chromas
  72  * @param count number of pictures to alloc
  73  * @return a valid cvpx pool or NULL, release it with CVPixelBufferPoolRelease()
  74  */
  75 CVPixelBufferPoolRef cvpxpool_create(const video_format_t *fmt, unsigned count);
  76
  77 /*
  78  * Get a cvpx buffer from a pool
  79  */
  80 CVPixelBufferRef cvpxpool_new_cvpx(CVPixelBufferPoolRef pool);
  81
  82 #endif