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 libavcodec/libdirac_libschro.c
23* functions common to libdirac and libschroedinger
24*/
25
26#include "libdirac_libschro.h"
27
28static 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
48unsigned 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 =
57                                        &ff_dirac_schro_video_format_info[idx];
58        if (avccontext->width  == vf->width &&
59            avccontext->height == vf->height){
60            ret_idx = idx;
61            if (avccontext->time_base.den == vf->frame_rate_num &&
62                avccontext->time_base.num == vf->frame_rate_denom) {
63                return idx;
64            }
65        }
66    }
67    return ret_idx;
68}
69
70void ff_dirac_schro_queue_init (FfmpegDiracSchroQueue *queue)
71{
72    queue->p_head = queue->p_tail = NULL;
73    queue->size = 0;
74}
75
76void ff_dirac_schro_queue_free (FfmpegDiracSchroQueue *queue,
77                                void (*free_func)(void *))
78{
79    while (queue->p_head) {
80        free_func( ff_dirac_schro_queue_pop(queue) );
81    }
82}
83
84int ff_dirac_schro_queue_push_back (FfmpegDiracSchroQueue *queue, void *p_data)
85{
86    FfmpegDiracSchroQueueElement *p_new =
87                             av_mallocz(sizeof(FfmpegDiracSchroQueueElement));
88
89    if (p_new == NULL)
90        return -1;
91
92    p_new->data = p_data;
93
94    if (queue->p_head == NULL)
95        queue->p_head = p_new;
96    else
97        queue->p_tail->next = p_new;
98    queue->p_tail = p_new;
99
100    ++queue->size;
101    return 0;
102}
103
104void *ff_dirac_schro_queue_pop (FfmpegDiracSchroQueue *queue)
105{
106    FfmpegDiracSchroQueueElement *top = queue->p_head;
107
108    if (top != NULL) {
109        void *data = top->data;
110        queue->p_head = queue->p_head->next;
111        --queue->size;
112        av_freep (&top);
113        return data;
114    }
115
116    return NULL;
117}
118