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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 | ||
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_RGB24: | |
61 | n = w * 3; | |
62 | depth = 3; | |
63 | maxval = 255; | |
64 | tuple_type = "RGB"; | |
65 | break; | |
66 | case AV_PIX_FMT_RGBA: | |
67 | n = w * 4; | |
68 | depth = 4; | |
69 | maxval = 255; | |
70 | tuple_type = "RGB_ALPHA"; | |
71 | break; | |
72 | case AV_PIX_FMT_RGB48BE: | |
73 | n = w * 6; | |
74 | depth = 3; | |
75 | maxval = 0xFFFF; | |
76 | tuple_type = "RGB"; | |
77 | break; | |
78 | case AV_PIX_FMT_RGBA64BE: | |
79 | n = w * 8; | |
80 | depth = 4; | |
81 | maxval = 0xFFFF; | |
82 | tuple_type = "RGB_ALPHA"; | |
83 | break; | |
84 | default: | |
85 | return -1; | |
86 | } | |
87 | ||
88 | if ((ret = ff_alloc_packet2(avctx, pkt, n*h + 200)) < 0) | |
89 | return ret; | |
90 | ||
91 | bytestream_start = | |
92 | bytestream = pkt->data; | |
93 | bytestream_end = pkt->data + pkt->size; | |
94 | ||
95 | snprintf(bytestream, bytestream_end - bytestream, | |
96 | "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %s\nENDHDR\n", | |
97 | w, h, depth, maxval, tuple_type); | |
98 | bytestream += strlen(bytestream); | |
99 | ||
100 | ptr = p->data[0]; | |
101 | linesize = p->linesize[0]; | |
102 | ||
103 | if (avctx->pix_fmt == AV_PIX_FMT_MONOBLACK){ | |
104 | int j; | |
105 | for (i = 0; i < h; i++) { | |
106 | for (j = 0; j < w; j++) | |
107 | *bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1; | |
108 | ptr += linesize; | |
109 | } | |
110 | } else { | |
111 | for (i = 0; i < h; i++) { | |
112 | memcpy(bytestream, ptr, n); | |
113 | bytestream += n; | |
114 | ptr += linesize; | |
115 | } | |
116 | } | |
117 | ||
118 | pkt->size = bytestream - bytestream_start; | |
119 | pkt->flags |= AV_PKT_FLAG_KEY; | |
120 | *got_packet = 1; | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static av_cold int pam_encode_init(AVCodecContext *avctx) | |
125 | { | |
126 | avctx->coded_frame = av_frame_alloc(); | |
127 | if (!avctx->coded_frame) | |
128 | return AVERROR(ENOMEM); | |
129 | ||
130 | avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; | |
131 | avctx->coded_frame->key_frame = 1; | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | static av_cold int pam_encode_close(AVCodecContext *avctx) | |
137 | { | |
138 | av_frame_free(&avctx->coded_frame); | |
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 | .close = pam_encode_close, | |
149 | .encode2 = pam_encode_frame, | |
150 | .pix_fmts = (const enum AVPixelFormat[]){ | |
151 | 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 | |
152 | }, | |
153 | }; |