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
pam_encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * p,int * got_packet)25 static int pam_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
26 const AVFrame *p, int *got_packet)
27 {
28 uint8_t *bytestream_start, *bytestream, *bytestream_end;
29 int i, h, w, n, linesize, depth, maxval, ret;
30 const char *tuple_type;
31 uint8_t *ptr;
32
33 h = avctx->height;
34 w = avctx->width;
35 switch (avctx->pix_fmt) {
36 case AV_PIX_FMT_MONOBLACK:
37 n = w;
38 depth = 1;
39 maxval = 1;
40 tuple_type = "BLACKANDWHITE";
41 break;
42 case AV_PIX_FMT_GRAY8:
43 n = w;
44 depth = 1;
45 maxval = 255;
46 tuple_type = "GRAYSCALE";
47 break;
48 case AV_PIX_FMT_GRAY16BE:
49 n = w * 2;
50 depth = 1;
51 maxval = 0xFFFF;
52 tuple_type = "GRAYSCALE";
53 break;
54 case AV_PIX_FMT_GRAY8A:
55 n = w * 2;
56 depth = 2;
57 maxval = 255;
58 tuple_type = "GRAYSCALE_ALPHA";
59 break;
60 case AV_PIX_FMT_YA16BE:
61 n = w * 4;
62 depth = 2;
63 maxval = 0xFFFF;
64 tuple_type = "GRAYSCALE_ALPHA";
65 break;
66 case AV_PIX_FMT_RGB24:
67 n = w * 3;
68 depth = 3;
69 maxval = 255;
70 tuple_type = "RGB";
71 break;
72 case AV_PIX_FMT_RGBA:
73 n = w * 4;
74 depth = 4;
75 maxval = 255;
76 tuple_type = "RGB_ALPHA";
77 break;
78 case AV_PIX_FMT_RGB48BE:
79 n = w * 6;
80 depth = 3;
81 maxval = 0xFFFF;
82 tuple_type = "RGB";
83 break;
84 case AV_PIX_FMT_RGBA64BE:
85 n = w * 8;
86 depth = 4;
87 maxval = 0xFFFF;
88 tuple_type = "RGB_ALPHA";
89 break;
90 default:
91 return -1;
92 }
93
94 if ((ret = ff_alloc_packet2(avctx, pkt, n*h + 200, 0)) < 0)
95 return ret;
96
97 bytestream_start =
98 bytestream = pkt->data;
99 bytestream_end = pkt->data + pkt->size;
100
101 snprintf(bytestream, bytestream_end - bytestream,
102 "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %s\nENDHDR\n",
103 w, h, depth, maxval, tuple_type);
104 bytestream += strlen(bytestream);
105
106 ptr = p->data[0];
107 linesize = p->linesize[0];
108
109 if (avctx->pix_fmt == AV_PIX_FMT_MONOBLACK){
110 int j;
111 for (i = 0; i < h; i++) {
112 for (j = 0; j < w; j++)
113 *bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1;
114 ptr += linesize;
115 }
116 } else {
117 for (i = 0; i < h; i++) {
118 memcpy(bytestream, ptr, n);
119 bytestream += n;
120 ptr += linesize;
121 }
122 }
123
124 pkt->size = bytestream - bytestream_start;
125 pkt->flags |= AV_PKT_FLAG_KEY;
126 *got_packet = 1;
127 return 0;
128 }
129
pam_encode_init(AVCodecContext * avctx)130 static av_cold int pam_encode_init(AVCodecContext *avctx)
131 {
132 #if FF_API_CODED_FRAME
133 FF_DISABLE_DEPRECATION_WARNINGS
134 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
135 avctx->coded_frame->key_frame = 1;
136 FF_ENABLE_DEPRECATION_WARNINGS
137 #endif
138
139 return 0;
140 }
141
142 AVCodec ff_pam_encoder = {
143 .name = "pam",
144 .long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
145 .type = AVMEDIA_TYPE_VIDEO,
146 .id = AV_CODEC_ID_PAM,
147 .init = pam_encode_init,
148 .encode2 = pam_encode_frame,
149 .pix_fmts = (const enum AVPixelFormat[]){
150 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA,
151 AV_PIX_FMT_RGB48BE, AV_PIX_FMT_RGBA64BE,
152 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A,
153 AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_YA16BE,
154 AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_NONE
155 },
156 };
157