FFmpeg
Main Page
Related Pages
Modules
Namespaces
Data Structures
Files
Examples
File List
Globals
All
Data Structures
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Macros
Groups
Pages
libavcodec
pamenc.c
Go to the documentation of this file.
1
/*
2
* PAM image format
3
* Copyright (c) 2002, 2003 Fabrice Bellard
4
*
5
* This file is part of FFmpeg.
6
*
7
* FFmpeg is free software; you can redistribute it and/or
8
* modify it under the terms of the GNU Lesser General Public
9
* License as published by the Free Software Foundation; either
10
* version 2.1 of the License, or (at your option) any later version.
11
*
12
* FFmpeg is distributed in the hope that it will be useful,
13
* but WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
* Lesser General Public License for more details.
16
*
17
* You should have received a copy of the GNU Lesser General Public
18
* License along with FFmpeg; if not, write to the Free Software
19
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
*/
21
22
#include "
avcodec.h
"
23
#include "
internal.h
"
24
#include "
pnm.h
"
25
26
27
static
int
pam_encode_frame
(
AVCodecContext
*avctx,
AVPacket
*
pkt
,
28
const
AVFrame
*pict,
int
*got_packet)
29
{
30
PNMContext
*
s
= avctx->
priv_data
;
31
AVFrame
*
const
p = &s->
picture
;
32
int
i, h, w,
n
, linesize,
depth
, maxval,
ret
;
33
const
char
*tuple_type;
34
uint8_t
*ptr;
35
36
h = avctx->
height
;
37
w = avctx->
width
;
38
switch
(avctx->
pix_fmt
) {
39
case
AV_PIX_FMT_MONOBLACK
:
40
n = w;
41
depth = 1;
42
maxval = 1;
43
tuple_type =
"BLACKANDWHITE"
;
44
break
;
45
case
AV_PIX_FMT_GRAY8
:
46
n = w;
47
depth = 1;
48
maxval = 255;
49
tuple_type =
"GRAYSCALE"
;
50
break
;
51
case
AV_PIX_FMT_GRAY16BE
:
52
n = w * 2;
53
depth = 1;
54
maxval = 0xFFFF;
55
tuple_type =
"GRAYSCALE"
;
56
break
;
57
case
AV_PIX_FMT_GRAY8A
:
58
n = w * 2;
59
depth = 2;
60
maxval = 255;
61
tuple_type =
"GRAYSCALE_ALPHA"
;
62
break
;
63
case
AV_PIX_FMT_RGB24
:
64
n = w * 3;
65
depth = 3;
66
maxval = 255;
67
tuple_type =
"RGB"
;
68
break
;
69
case
AV_PIX_FMT_RGBA
:
70
n = w * 4;
71
depth = 4;
72
maxval = 255;
73
tuple_type =
"RGB_ALPHA"
;
74
break
;
75
case
AV_PIX_FMT_RGB48BE
:
76
n = w * 6;
77
depth = 3;
78
maxval = 0xFFFF;
79
tuple_type =
"RGB"
;
80
break
;
81
case
AV_PIX_FMT_RGBA64BE
:
82
n = w * 8;
83
depth = 4;
84
maxval = 0xFFFF;
85
tuple_type =
"RGB_ALPHA"
;
86
break
;
87
default
:
88
return
-1;
89
}
90
91
if
((ret =
ff_alloc_packet2
(avctx, pkt, n*h + 200)) < 0)
92
return
ret
;
93
94
*p = *pict;
95
p->
pict_type
=
AV_PICTURE_TYPE_I
;
96
p->
key_frame
= 1;
97
98
s->
bytestream_start
=
99
s->
bytestream
= pkt->
data
;
100
s->
bytestream_end
= pkt->
data
+ pkt->
size
;
101
102
snprintf
(s->
bytestream
, s->
bytestream_end
- s->
bytestream
,
103
"P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %s\nENDHDR\n"
,
104
w, h, depth, maxval, tuple_type);
105
s->
bytestream
+= strlen(s->
bytestream
);
106
107
ptr = p->
data
[0];
108
linesize = p->
linesize
[0];
109
110
if
(avctx->
pix_fmt
==
AV_PIX_FMT_MONOBLACK
){
111
int
j;
112
for
(i = 0; i < h; i++) {
113
for
(j = 0; j < w; j++)
114
*s->
bytestream
++ = ptr[j >> 3] >> (7 - j & 7) & 1;
115
ptr += linesize;
116
}
117
}
else
{
118
for
(i = 0; i < h; i++) {
119
memcpy(s->
bytestream
, ptr, n);
120
s->
bytestream
+=
n
;
121
ptr += linesize;
122
}
123
}
124
125
pkt->
size
= s->
bytestream
- s->
bytestream_start
;
126
pkt->
flags
|=
AV_PKT_FLAG_KEY
;
127
*got_packet = 1;
128
return
0;
129
}
130
131
132
AVCodec
ff_pam_encoder
= {
133
.
name
=
"pam"
,
134
.type =
AVMEDIA_TYPE_VIDEO
,
135
.id =
AV_CODEC_ID_PAM
,
136
.priv_data_size =
sizeof
(
PNMContext
),
137
.
init
=
ff_pnm_init
,
138
.encode2 =
pam_encode_frame
,
139
.pix_fmts = (
const
enum
AVPixelFormat
[]){
140
AV_PIX_FMT_RGB24
,
AV_PIX_FMT_RGBA
,
AV_PIX_FMT_RGB48BE
,
AV_PIX_FMT_RGBA64BE
,
AV_PIX_FMT_GRAY8
,
AV_PIX_FMT_GRAY8A
,
AV_PIX_FMT_GRAY16BE
,
AV_PIX_FMT_MONOBLACK
,
AV_PIX_FMT_NONE
141
},
142
.long_name =
NULL_IF_CONFIG_SMALL
(
"PAM (Portable AnyMap) image"
),
143
};
Generated on Wed Jul 10 2013 23:48:03 for FFmpeg by
1.8.2