src/gallium/auxiliary/vl/vl_decoder.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 Younes Manton.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "pipe/p_video_decoder.h"
  29
  30 #include "util/u_video.h"
  31
  32 #include "vl_decoder.h"
  33 #include "vl_mpeg12_decoder.h"
  34
  35 bool
  36 vl_profile_supported(struct pipe_screen *screen, enum pipe_video_profile profile)
  37 {
  38    assert(screen);
  39    switch (u_reduce_video_profile(profile)) {
  40       case PIPE_VIDEO_CODEC_MPEG12:
  41          return true;
  42       default:
  43          return false;
  44    }
  45 }
  46
  47 int
  48 vl_level_supported(struct pipe_screen *screen, enum pipe_video_profile profile)
  49 {
  50    assert(screen);
  51    switch (profile) {
  52       case PIPE_VIDEO_PROFILE_MPEG1:
  53          return 0;
  54       case PIPE_VIDEO_PROFILE_MPEG2_SIMPLE:
  55       case PIPE_VIDEO_PROFILE_MPEG2_MAIN:
  56          return 3;
  57       default:
  58          return 0;
  59    }
  60 }
  61
  62 struct pipe_video_decoder *
  63 vl_create_decoder(struct pipe_context *pipe,
  64                   enum pipe_video_profile profile,
  65                   enum pipe_video_entrypoint entrypoint,
  66                   enum pipe_video_chroma_format chroma_format,
  67                   unsigned width, unsigned height, unsigned max_references,
  68                   bool expect_chunked_decode)
  69 {
  70    unsigned buffer_width, buffer_height;
  71    bool pot_buffers;
  72
  73    assert(pipe);
  74    assert(width > 0 && height > 0);
  75
  76    pot_buffers = !pipe->screen->get_video_param
  77    (
  78       pipe->screen,
  79       profile,
  80       PIPE_VIDEO_CAP_NPOT_TEXTURES
  81    );
  82
  83    buffer_width = pot_buffers ? util_next_power_of_two(width) : align(width, VL_MACROBLOCK_WIDTH);
  84    buffer_height = pot_buffers ? util_next_power_of_two(height) : align(height, VL_MACROBLOCK_HEIGHT);
  85
  86    switch (u_reduce_video_profile(profile)) {
  87       case PIPE_VIDEO_CODEC_MPEG12:
  88          return vl_create_mpeg12_decoder(pipe, profile, entrypoint, chroma_format,
  89                                          buffer_width, buffer_height, max_references,
  90                                          expect_chunked_decode);
  91       default:
  92          return NULL;
  93    }
  94    return NULL;
  95 }