1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* PNM image format
* Copyright (c) 2002, 2003 Fabrice Bellard
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
#include "pnm.h"
static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pict, int *got_packet)
{
PNMContext *s = avctx->priv_data;
AVFrame * const p = (AVFrame*)&s->picture;
int i, h, h1, c, n, linesize, ret;
uint8_t *ptr, *ptr1, *ptr2;
if ((ret = ff_alloc_packet(pkt, avpicture_get_size(avctx->pix_fmt,
avctx->width,
avctx->height) + 200)) < 0) {
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
return ret;
}
*p = *pict;
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
s->bytestream_start =
s->bytestream = pkt->data;
s->bytestream_end = pkt->data + pkt->size;
h = avctx->height;
h1 = h;
switch (avctx->pix_fmt) {
case PIX_FMT_MONOWHITE:
c = '4';
n = (avctx->width + 7) >> 3;
break;
case PIX_FMT_GRAY8:
c = '5';
n = avctx->width;
break;
case PIX_FMT_GRAY16BE:
c = '5';
n = avctx->width * 2;
break;
case PIX_FMT_RGB24:
c = '6';
n = avctx->width * 3;
break;
case PIX_FMT_RGB48BE:
c = '6';
n = avctx->width * 6;
break;
case PIX_FMT_YUV420P:
c = '5';
n = avctx->width;
h1 = (h * 3) / 2;
break;
default:
return -1;
}
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"P%c\n%d %d\n", c, avctx->width, h1);
s->bytestream += strlen(s->bytestream);
if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"%d\n", (avctx->pix_fmt != PIX_FMT_GRAY16BE && avctx->pix_fmt != PIX_FMT_RGB48BE) ? 255 : 65535);
s->bytestream += strlen(s->bytestream);
}
ptr = p->data[0];
linesize = p->linesize[0];
for (i = 0; i < h; i++) {
memcpy(s->bytestream, ptr, n);
s->bytestream += n;
ptr += linesize;
}
if (avctx->pix_fmt == PIX_FMT_YUV420P) {
h >>= 1;
n >>= 1;
ptr1 = p->data[1];
ptr2 = p->data[2];
for (i = 0; i < h; i++) {
memcpy(s->bytestream, ptr1, n);
s->bytestream += n;
memcpy(s->bytestream, ptr2, n);
s->bytestream += n;
ptr1 += p->linesize[1];
ptr2 += p->linesize[2];
}
}
pkt->size = s->bytestream - s->bytestream_start;
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
#if CONFIG_PGM_ENCODER
AVCodec ff_pgm_encoder = {
.name = "pgm",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_PGM,
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.encode2 = pnm_encode_frame,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
};
#endif
#if CONFIG_PGMYUV_ENCODER
AVCodec ff_pgmyuv_encoder = {
.name = "pgmyuv",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_PGMYUV,
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.encode2 = pnm_encode_frame,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
};
#endif
#if CONFIG_PPM_ENCODER
AVCodec ff_ppm_encoder = {
.name = "ppm",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_PPM,
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.encode2 = pnm_encode_frame,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB48BE, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
};
#endif
#if CONFIG_PBM_ENCODER
AVCodec ff_pbm_encoder = {
.name = "pbm",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_PBM,
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.encode2 = pnm_encode_frame,
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_MONOWHITE, PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
};
#endif
|
