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stereo3d.c
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1 /*
2  * Copyright (c) 2013 Vittorio Giovara <vittorio.giovara@gmail.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 #include <stdint.h>
22 #include <string.h>
23 
24 #include "common.h"
25 #include "mem.h"
26 #include "stereo3d.h"
27 
29 {
30  return av_mallocz(sizeof(AVStereo3D));
31 }
32 
34 {
35  AVFrameSideData *side_data = av_frame_new_side_data(frame,
37  sizeof(AVStereo3D));
38  if (!side_data)
39  return NULL;
40 
41  memset(side_data->data, 0, sizeof(AVStereo3D));
42 
43  return (AVStereo3D *)side_data->data;
44 }
45 
46 static const char *stereo3d_type_names[] = {
47  [AV_STEREO3D_2D] = "2D",
48  [AV_STEREO3D_SIDEBYSIDE] = "side by side",
49  [AV_STEREO3D_TOPBOTTOM] = "top and bottom",
50  [AV_STEREO3D_FRAMESEQUENCE] = "frame alternate",
51  [AV_STEREO3D_CHECKERBOARD] = "checkerboard",
52  [AV_STEREO3D_SIDEBYSIDE_QUINCUNX] = "side by side (quincunx subsampling)",
53  [AV_STEREO3D_LINES] = "interleaved lines",
54  [AV_STEREO3D_COLUMNS] = "interleaved columns",
55 };
56 
57 const char *av_stereo3d_type_name(unsigned int type)
58 {
60  return "unknown";
61 
62  return stereo3d_type_names[type];
63 }
64 
65 int av_stereo3d_from_name(const char *name)
66 {
67  int i;
68 
69  for (i = 0; i < FF_ARRAY_ELEMS(stereo3d_type_names); i++) {
70  size_t len = strlen(stereo3d_type_names[i]);
71  if (!strncmp(stereo3d_type_names[i], name, len))
72  return i;
73  }
74 
75  return -1;
76 }
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
memory handling functions
Views are next to each other.
Definition: stereo3d.h:45
static const char * stereo3d_type_names[]
Definition: stereo3d.c:46
const char * av_stereo3d_type_name(unsigned int type)
Provide a human-readable name of a given stereo3d type.
Definition: stereo3d.c:57
Stereo 3D type: this structure describes how two videos are packed within a single video surface...
Definition: stereo3d.h:123
static AVFrame * frame
Structure to hold side data for an AVFrame.
Definition: frame.h:143
int av_stereo3d_from_name(const char *name)
Get the AVStereo3DType form a human-readable name.
Definition: stereo3d.c:65
Views are alternated temporally.
Definition: stereo3d.h:66
Views are packed per line, as if interlaced.
Definition: stereo3d.h:97
#define FF_ARRAY_ELEMS(a)
Views are packed per column.
Definition: stereo3d.h:107
Views are next to each other, but when upscaling apply a checkerboard pattern.
Definition: stereo3d.h:87
uint8_t * data
Definition: frame.h:145
GLint GLenum type
Definition: opengl_enc.c:105
AVFrameSideData * av_frame_new_side_data(AVFrame *frame, enum AVFrameSideDataType type, int size)
Add a new side data to a frame.
Definition: frame.c:616
AVStereo3D * av_stereo3d_create_side_data(AVFrame *frame)
Allocate a complete AVFrameSideData and add it to the frame.
Definition: stereo3d.c:33
common internal and external API header
Video is not stereoscopic (and metadata has to be there).
Definition: stereo3d.h:35
Views are packed in a checkerboard-like structure per pixel.
Definition: stereo3d.h:76
int len
Views are on top of each other.
Definition: stereo3d.h:55
AVStereo3D * av_stereo3d_alloc(void)
Allocate an AVStereo3D structure and set its fields to default values.
Definition: stereo3d.c:28
Stereoscopic 3d metadata.
Definition: frame.h:62
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
const char * name
Definition: opengl_enc.c:103