libschroedinger.c
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1 /*
2  * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
3  *
4  * This file is part of Libav.
5  *
6  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
26 #include "libdirac_libschro.h"
27 #include "libschroedinger.h"
28 
33 static const SchroVideoFormatEnum ff_schro_video_formats[]={
34  SCHRO_VIDEO_FORMAT_CUSTOM ,
35  SCHRO_VIDEO_FORMAT_QSIF ,
36  SCHRO_VIDEO_FORMAT_QCIF ,
37  SCHRO_VIDEO_FORMAT_SIF ,
38  SCHRO_VIDEO_FORMAT_CIF ,
39  SCHRO_VIDEO_FORMAT_4SIF ,
40  SCHRO_VIDEO_FORMAT_4CIF ,
41  SCHRO_VIDEO_FORMAT_SD480I_60 ,
42  SCHRO_VIDEO_FORMAT_SD576I_50 ,
43  SCHRO_VIDEO_FORMAT_HD720P_60 ,
44  SCHRO_VIDEO_FORMAT_HD720P_50 ,
45  SCHRO_VIDEO_FORMAT_HD1080I_60 ,
46  SCHRO_VIDEO_FORMAT_HD1080I_50 ,
47  SCHRO_VIDEO_FORMAT_HD1080P_60 ,
48  SCHRO_VIDEO_FORMAT_HD1080P_50 ,
49  SCHRO_VIDEO_FORMAT_DC2K_24 ,
50  SCHRO_VIDEO_FORMAT_DC4K_24 ,
51 };
52 
53 SchroVideoFormatEnum ff_get_schro_video_format_preset(AVCodecContext *avccontext)
54 {
55  unsigned int num_formats = sizeof(ff_schro_video_formats) /
56  sizeof(ff_schro_video_formats[0]);
57 
58  unsigned int idx = ff_dirac_schro_get_video_format_idx (avccontext);
59 
60  return (idx < num_formats) ? ff_schro_video_formats[idx] :
61  SCHRO_VIDEO_FORMAT_CUSTOM;
62 }
63 
65  SchroFrameFormat *schro_frame_fmt)
66 {
67  unsigned int num_formats = sizeof(schro_pixel_format_map) /
68  sizeof(schro_pixel_format_map[0]);
69 
70  int idx;
71 
72  for (idx = 0; idx < num_formats; ++idx) {
73  if (schro_pixel_format_map[idx].schro_pix_fmt == schro_pix_fmt) {
74  *schro_frame_fmt = schro_pixel_format_map[idx].schro_frame_fmt;
75  return 0;
76  }
77  }
78  return -1;
79 }
80 
81 static void FreeSchroFrame(SchroFrame *frame, void *priv)
82 {
83  AVPicture *p_pic = priv;
84 
85  if (!p_pic)
86  return;
87 
88  avpicture_free(p_pic);
89  av_freep(&p_pic);
90 }
91 
92 SchroFrame *ff_create_schro_frame(AVCodecContext *avccontext,
93  SchroFrameFormat schro_frame_fmt)
94 {
95  AVPicture *p_pic;
96  SchroFrame *p_frame;
97  int y_width, uv_width;
98  int y_height, uv_height;
99  int i;
100 
101  y_width = avccontext->width;
102  y_height = avccontext->height;
103  uv_width = y_width >> (SCHRO_FRAME_FORMAT_H_SHIFT(schro_frame_fmt));
104  uv_height = y_height >> (SCHRO_FRAME_FORMAT_V_SHIFT(schro_frame_fmt));
105 
106  p_pic = av_mallocz(sizeof(AVPicture));
107  avpicture_alloc(p_pic, avccontext->pix_fmt, y_width, y_height);
108 
109  p_frame = schro_frame_new();
110  p_frame->format = schro_frame_fmt;
111  p_frame->width = y_width;
112  p_frame->height = y_height;
113  schro_frame_set_free_callback(p_frame, FreeSchroFrame, (void *)p_pic);
114 
115  for (i = 0; i < 3; ++i) {
116  p_frame->components[i].width = i ? uv_width : y_width;
117  p_frame->components[i].stride = p_pic->linesize[i];
118  p_frame->components[i].height = i ? uv_height : y_height;
119  p_frame->components[i].length =
120  p_frame->components[i].stride * p_frame->components[i].height;
121  p_frame->components[i].data = p_pic->data[i];
122 
123  if (i) {
124  p_frame->components[i].v_shift =
125  SCHRO_FRAME_FORMAT_V_SHIFT(p_frame->format);
126  p_frame->components[i].h_shift =
127  SCHRO_FRAME_FORMAT_H_SHIFT(p_frame->format);
128  }
129  }
130 
131  return p_frame;
132 }