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      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 struct pipe_video_decoder *
     48 vl_create_decoder(struct pipe_context *pipe,
     49                   enum pipe_video_profile profile,
     50                   enum pipe_video_entrypoint entrypoint,
     51                   enum pipe_video_chroma_format chroma_format,
     52                   unsigned width, unsigned height, unsigned max_references,
     53                   bool expect_chunked_decode)
     54 {
     55    unsigned buffer_width, buffer_height;
     56    bool pot_buffers;
     57 
     58    assert(pipe);
     59    assert(width > 0 && height > 0);
     60 
     61    pot_buffers = !pipe->screen->get_video_param
     62    (
     63       pipe->screen,
     64       profile,
     65       PIPE_VIDEO_CAP_NPOT_TEXTURES
     66    );
     67 
     68    buffer_width = pot_buffers ? util_next_power_of_two(width) : align(width, VL_MACROBLOCK_WIDTH);
     69    buffer_height = pot_buffers ? util_next_power_of_two(height) : align(height, VL_MACROBLOCK_HEIGHT);
     70 
     71    switch (u_reduce_video_profile(profile)) {
     72       case PIPE_VIDEO_CODEC_MPEG12:
     73          return vl_create_mpeg12_decoder(pipe, profile, entrypoint, chroma_format,
     74                                          buffer_width, buffer_height, max_references,
     75                                          expect_chunked_decode);
     76       default:
     77          return NULL;
     78    }
     79    return NULL;
     80 }
     81