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 "libavutil/avassert.h"
23 #include "avcodec.h"
24 #include "codec_internal.h"
25 #include "encode.h"
26
pam_encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * p,int * got_packet)27 static int pam_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
28 const AVFrame *p, int *got_packet)
29 {
30 int i, h, w, n, linesize, depth, maxval, ret, header_size;
31 uint8_t *bytestream, *ptr;
32 const char *tuple_type;
33 char header[100];
34
35 h = avctx->height;
36 w = avctx->width;
37 switch (avctx->pix_fmt) {
38 case AV_PIX_FMT_MONOBLACK:
39 n = w;
40 depth = 1;
41 maxval = 1;
42 tuple_type = "BLACKANDWHITE";
43 break;
44 case AV_PIX_FMT_GRAY8:
45 n = w;
46 depth = 1;
47 maxval = 255;
48 tuple_type = "GRAYSCALE";
49 break;
50 case AV_PIX_FMT_GRAY16BE:
51 n = w * 2;
52 depth = 1;
53 maxval = 0xFFFF;
54 tuple_type = "GRAYSCALE";
55 break;
56 case AV_PIX_FMT_GRAY8A:
57 n = w * 2;
58 depth = 2;
59 maxval = 255;
60 tuple_type = "GRAYSCALE_ALPHA";
61 break;
62 case AV_PIX_FMT_YA16BE:
63 n = w * 4;
64 depth = 2;
65 maxval = 0xFFFF;
66 tuple_type = "GRAYSCALE_ALPHA";
67 break;
68 case AV_PIX_FMT_RGB24:
69 n = w * 3;
70 depth = 3;
71 maxval = 255;
72 tuple_type = "RGB";
73 break;
74 case AV_PIX_FMT_RGBA:
75 n = w * 4;
76 depth = 4;
77 maxval = 255;
78 tuple_type = "RGB_ALPHA";
79 break;
80 case AV_PIX_FMT_RGB48BE:
81 n = w * 6;
82 depth = 3;
83 maxval = 0xFFFF;
84 tuple_type = "RGB";
85 break;
86 case AV_PIX_FMT_RGBA64BE:
87 n = w * 8;
88 depth = 4;
89 maxval = 0xFFFF;
90 tuple_type = "RGB_ALPHA";
91 break;
92 default:
93 return -1;
94 }
95
96 header_size = snprintf(header, sizeof(header),
97 "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %s\nENDHDR\n",
98 w, h, depth, maxval, tuple_type);
99 av_assert1(header_size < sizeof(header));
100
101 if ((ret = ff_get_encode_buffer(avctx, pkt, n*h + header_size, 0)) < 0)
102 return ret;
103
104 bytestream = pkt->data;
105 memcpy(bytestream, header, header_size);
106 bytestream += header_size;
107
108 ptr = p->data[0];
109 linesize = p->linesize[0];
110
111 if (avctx->pix_fmt == AV_PIX_FMT_MONOBLACK){
112 int j;
113 for (i = 0; i < h; i++) {
114 for (j = 0; j < w; j++)
115 *bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1;
116 ptr += linesize;
117 }
118 } else {
119 for (i = 0; i < h; i++) {
120 memcpy(bytestream, ptr, n);
121 bytestream += n;
122 ptr += linesize;
123 }
124 }
125
126 *got_packet = 1;
127 return 0;
128 }
129
130 const FFCodec ff_pam_encoder = {
131 .p.name = "pam",
132 .p.long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
133 .p.type = AVMEDIA_TYPE_VIDEO,
134 .p.id = AV_CODEC_ID_PAM,
135 .p.capabilities = AV_CODEC_CAP_DR1,
136 FF_CODEC_ENCODE_CB(pam_encode_frame),
137 .p.pix_fmts = (const enum AVPixelFormat[]){
138 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA,
139 AV_PIX_FMT_RGB48BE, AV_PIX_FMT_RGBA64BE,
140 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A,
141 AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_YA16BE,
142 AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_NONE
143 },
144 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
145 };
146