Simplify 'if' condition statements.
[libav.git] / 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 libavcodec/libdirac_libschro.c
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 =
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
70 void ff_dirac_schro_queue_init (FfmpegDiracSchroQueue *queue)
71 {
72 queue->p_head = queue->p_tail = NULL;
73 queue->size = 0;
74 }
75
76 void 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
84 int 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)
90 return -1;
91
92 p_new->data = p_data;
93
94 if (!queue->p_head)
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
104 void *ff_dirac_schro_queue_pop (FfmpegDiracSchroQueue *queue)
105 {
106 FfmpegDiracSchroQueueElement *top = queue->p_head;
107
108 if (top) {
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 }