FFmpeg
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 * const 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:295
Memory handling functions.
Views are next to each other, but when upscaling apply a checkerboard pattern.
Definition: stereo3d.h:117
GLint GLenum type
Definition: opengl_enc.c:104
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
Views are next to each other.
Definition: stereo3d.h:67
AVStereo3D * av_stereo3d_alloc(void)
Allocate an AVStereo3D structure and set its fields to default values.
Definition: stereo3d.c:28
Stereo 3D type: this structure describes how two videos are packed within a single video surface...
Definition: stereo3d.h:176
Structure to hold side data for an AVFrame.
Definition: frame.h:201
const char * av_stereo3d_type_name(unsigned int type)
Provide a human-readable name of a given stereo3d type.
Definition: stereo3d.c:57
Video is not stereoscopic (and metadata has to be there).
Definition: stereo3d.h:55
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
Views are packed per line, as if interlaced.
Definition: stereo3d.h:129
AVStereo3D * av_stereo3d_create_side_data(AVFrame *frame)
Allocate a complete AVFrameSideData and add it to the frame.
Definition: stereo3d.c:33
Views are alternated temporally.
Definition: stereo3d.h:92
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
int av_stereo3d_from_name(const char *name)
Get the AVStereo3DType form a human-readable name.
Definition: stereo3d.c:65
#define FF_ARRAY_ELEMS(a)
Views are packed in a checkerboard-like structure per pixel.
Definition: stereo3d.h:104
Views are on top of each other.
Definition: stereo3d.h:79
uint8_t * data
Definition: frame.h:203
AVFrameSideData * av_frame_new_side_data(AVFrame *frame, enum AVFrameSideDataType type, int size)
Add a new side data to a frame.
Definition: frame.c:722
static const char *const stereo3d_type_names[]
Definition: stereo3d.c:46
common internal and external API header
Stereoscopic video.
Views are packed per column.
Definition: stereo3d.h:141
int len
Stereoscopic 3d metadata.
Definition: frame.h:63
const char * name
Definition: opengl_enc.c:102