release/src/router/ffmpeg/libavcodec/libdirac_libschro.c

   1 /*
   2  * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /**
  22 * @file
  23 * functions common to libdirac and libschroedinger
  24 */
  25
  26 #include "libdirac_libschro.h"
  27
  28 static const FfmpegDiracSchroVideoFormatInfo ff_dirac_schro_video_format_info[] = {
  29     { 640,  480,  24000, 1001},
  30     { 176,  120,  15000, 1001},
  31     { 176,  144,  25,    2   },
  32     { 352,  240,  15000, 1001},
  33     { 352,  288,  25,    2   },
  34     { 704,  480,  15000, 1001},
  35     { 704,  576,  25,    2   },
  36     { 720,  480,  30000, 1001},
  37     { 720,  576,  25,    1   },
  38     { 1280, 720,  60000, 1001},
  39     { 1280, 720,  50,    1   },
  40     { 1920, 1080, 30000, 1001},
  41     { 1920, 1080, 25,    1   },
  42     { 1920, 1080, 60000, 1001},
  43     { 1920, 1080, 50,    1   },
  44     { 2048, 1080, 24,    1   },
  45     { 4096, 2160, 24,    1   },
  46 };
  47
  48 unsigned int ff_dirac_schro_get_video_format_idx(AVCodecContext *avccontext)
  49 {
  50     unsigned int ret_idx = 0;
  51     unsigned int idx;
  52     unsigned int num_formats = sizeof(ff_dirac_schro_video_format_info) /
  53                                sizeof(ff_dirac_schro_video_format_info[0]);
  54
  55     for (idx = 1; idx < num_formats; ++idx) {
  56         const FfmpegDiracSchroVideoFormatInfo *vf = &ff_dirac_schro_video_format_info[idx];
  57         if (avccontext->width  == vf->width &&
  58             avccontext->height == vf->height) {
  59             ret_idx = idx;
  60             if (avccontext->time_base.den == vf->frame_rate_num &&
  61                 avccontext->time_base.num == vf->frame_rate_denom)
  62                 return idx;
  63         }
  64     }
  65     return ret_idx;
  66 }
  67
  68 void ff_dirac_schro_queue_init(FfmpegDiracSchroQueue *queue)
  69 {
  70     queue->p_head = queue->p_tail = NULL;
  71     queue->size = 0;
  72 }
  73
  74 void ff_dirac_schro_queue_free(FfmpegDiracSchroQueue *queue,
  75                                void (*free_func)(void *))
  76 {
  77     while (queue->p_head)
  78         free_func(ff_dirac_schro_queue_pop(queue));
  79 }
  80
  81 int ff_dirac_schro_queue_push_back(FfmpegDiracSchroQueue *queue, void *p_data)
  82 {
  83     FfmpegDiracSchroQueueElement *p_new = av_mallocz(sizeof(FfmpegDiracSchroQueueElement));
  84
  85     if (!p_new)
  86         return -1;
  87
  88     p_new->data = p_data;
  89
  90     if (!queue->p_head)
  91         queue->p_head = p_new;
  92     else
  93         queue->p_tail->next = p_new;
  94     queue->p_tail = p_new;
  95
  96     ++queue->size;
  97     return 0;
  98 }
  99
 100 void *ff_dirac_schro_queue_pop(FfmpegDiracSchroQueue *queue)
 101 {
 102     FfmpegDiracSchroQueueElement *top = queue->p_head;
 103
 104     if (top) {
 105         void *data = top->data;
 106         queue->p_head = queue->p_head->next;
 107         --queue->size;
 108         av_freep(&top);
 109         return data;
 110     }
 111
 112     return NULL;
 113 }