/*
  * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg 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.
  *
  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**

 * @file

 * functions common to libdirac and libschroedinger
 */
 

 #include "libdirac_libschro.h"

 
 static const FfmpegDiracSchroVideoFormatInfo ff_dirac_schro_video_format_info[] = {
     { 640,  480,  24000, 1001},
     { 176,  120,  15000, 1001},
     { 176,  144,  25,    2   },
     { 352,  240,  15000, 1001},
     { 352,  288,  25,    2   },
     { 704,  480,  15000, 1001},
     { 704,  576,  25,    2   },
     { 720,  480,  30000, 1001},
     { 720,  576,  25,    1   },
     { 1280, 720,  60000, 1001},
     { 1280, 720,  50,    1   },
     { 1920, 1080, 30000, 1001},
     { 1920, 1080, 25,    1   },
     { 1920, 1080, 60000, 1001},
     { 1920, 1080, 50,    1   },
     { 2048, 1080, 24,    1   },
     { 4096, 2160, 24,    1   },
 };
 

 unsigned int ff_dirac_schro_get_video_format_idx(AVCodecContext *avccontext)

 {
     unsigned int ret_idx = 0;
     unsigned int idx;
     unsigned int num_formats = sizeof(ff_dirac_schro_video_format_info) /
                                sizeof(ff_dirac_schro_video_format_info[0]);
 

     for (idx = 1; idx < num_formats; ++idx) {
         const FfmpegDiracSchroVideoFormatInfo *vf = &ff_dirac_schro_video_format_info[idx];

         if (avccontext->width  == vf->width &&

             avccontext->height == vf->height) {

             ret_idx = idx;
             if (avccontext->time_base.den == vf->frame_rate_num &&

                 avccontext->time_base.num == vf->frame_rate_denom)

                 return idx;
         }
     }
     return ret_idx;
 }
 

 void ff_dirac_schro_queue_init(FfmpegDiracSchroQueue *queue)

 {
     queue->p_head = queue->p_tail = NULL;

     queue->size = 0;

 }
 

 void ff_dirac_schro_queue_free(FfmpegDiracSchroQueue *queue,
                                void (*free_func)(void *))

 {

     while (queue->p_head)

         free_func(ff_dirac_schro_queue_pop(queue));

 }
 

 int ff_dirac_schro_queue_push_back(FfmpegDiracSchroQueue *queue, void *p_data)

 {

     FfmpegDiracSchroQueueElement *p_new = av_mallocz(sizeof(FfmpegDiracSchroQueueElement));

     if (!p_new)

         return -1;
 
     p_new->data = p_data;
 

     if (!queue->p_head)

         queue->p_head = p_new;
     else
         queue->p_tail->next = p_new;
     queue->p_tail = p_new;
 

     ++queue->size;

     return 0;
 }
 

 void *ff_dirac_schro_queue_pop(FfmpegDiracSchroQueue *queue)

 {
     FfmpegDiracSchroQueueElement *top = queue->p_head;
 

     if (top) {

         void *data = top->data;
         queue->p_head = queue->p_head->next;

         --queue->size;

         av_freep(&top);

         return data;
     }
 
     return NULL;
 }