843629e8b9dd846e41a74f28805b6b4e36a0588f
[libav.git] / libavcodec / pnmenc.c
1 /*
2 * PNM image format
3 * Copyright (c) 2002, 2003 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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 "bytestream.h"
24 #include "internal.h"
25 #include "pnm.h"
26
27
28 static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
29 const AVFrame *pict, int *got_packet)
30 {
31 PNMContext *s = avctx->priv_data;
32 AVFrame * const p = &s->picture;
33 int i, h, h1, c, n, linesize, ret;
34 uint8_t *ptr, *ptr1, *ptr2;
35
36 if ((ret = ff_alloc_packet(pkt, avpicture_get_size(avctx->pix_fmt,
37 avctx->width,
38 avctx->height) + 200)) < 0) {
39 av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
40 return ret;
41 }
42
43 *p = *pict;
44 p->pict_type = AV_PICTURE_TYPE_I;
45 p->key_frame = 1;
46
47 s->bytestream_start =
48 s->bytestream = pkt->data;
49 s->bytestream_end = pkt->data + pkt->size;
50
51 h = avctx->height;
52 h1 = h;
53 switch (avctx->pix_fmt) {
54 case PIX_FMT_MONOWHITE:
55 c = '4';
56 n = (avctx->width + 7) >> 3;
57 break;
58 case PIX_FMT_GRAY8:
59 c = '5';
60 n = avctx->width;
61 break;
62 case PIX_FMT_GRAY16BE:
63 c = '5';
64 n = avctx->width * 2;
65 break;
66 case PIX_FMT_RGB24:
67 c = '6';
68 n = avctx->width * 3;
69 break;
70 case PIX_FMT_RGB48BE:
71 c = '6';
72 n = avctx->width * 6;
73 break;
74 case PIX_FMT_YUV420P:
75 c = '5';
76 n = avctx->width;
77 h1 = (h * 3) / 2;
78 break;
79 default:
80 return -1;
81 }
82 snprintf(s->bytestream, s->bytestream_end - s->bytestream,
83 "P%c\n%d %d\n", c, avctx->width, h1);
84 s->bytestream += strlen(s->bytestream);
85 if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
86 snprintf(s->bytestream, s->bytestream_end - s->bytestream,
87 "%d\n", (avctx->pix_fmt != PIX_FMT_GRAY16BE && avctx->pix_fmt != PIX_FMT_RGB48BE) ? 255 : 65535);
88 s->bytestream += strlen(s->bytestream);
89 }
90
91 ptr = p->data[0];
92 linesize = p->linesize[0];
93 for (i = 0; i < h; i++) {
94 memcpy(s->bytestream, ptr, n);
95 s->bytestream += n;
96 ptr += linesize;
97 }
98
99 if (avctx->pix_fmt == PIX_FMT_YUV420P) {
100 h >>= 1;
101 n >>= 1;
102 ptr1 = p->data[1];
103 ptr2 = p->data[2];
104 for (i = 0; i < h; i++) {
105 memcpy(s->bytestream, ptr1, n);
106 s->bytestream += n;
107 memcpy(s->bytestream, ptr2, n);
108 s->bytestream += n;
109 ptr1 += p->linesize[1];
110 ptr2 += p->linesize[2];
111 }
112 }
113 pkt->size = s->bytestream - s->bytestream_start;
114 pkt->flags |= AV_PKT_FLAG_KEY;
115 *got_packet = 1;
116
117 return 0;
118 }
119
120
121 #if CONFIG_PGM_ENCODER
122 AVCodec ff_pgm_encoder = {
123 .name = "pgm",
124 .type = AVMEDIA_TYPE_VIDEO,
125 .id = CODEC_ID_PGM,
126 .priv_data_size = sizeof(PNMContext),
127 .init = ff_pnm_init,
128 .encode2 = pnm_encode_frame,
129 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, PIX_FMT_NONE},
130 .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
131 };
132 #endif
133
134 #if CONFIG_PGMYUV_ENCODER
135 AVCodec ff_pgmyuv_encoder = {
136 .name = "pgmyuv",
137 .type = AVMEDIA_TYPE_VIDEO,
138 .id = CODEC_ID_PGMYUV,
139 .priv_data_size = sizeof(PNMContext),
140 .init = ff_pnm_init,
141 .encode2 = pnm_encode_frame,
142 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
143 .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
144 };
145 #endif
146
147 #if CONFIG_PPM_ENCODER
148 AVCodec ff_ppm_encoder = {
149 .name = "ppm",
150 .type = AVMEDIA_TYPE_VIDEO,
151 .id = CODEC_ID_PPM,
152 .priv_data_size = sizeof(PNMContext),
153 .init = ff_pnm_init,
154 .encode2 = pnm_encode_frame,
155 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB48BE, PIX_FMT_NONE},
156 .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
157 };
158 #endif
159
160 #if CONFIG_PBM_ENCODER
161 AVCodec ff_pbm_encoder = {
162 .name = "pbm",
163 .type = AVMEDIA_TYPE_VIDEO,
164 .id = CODEC_ID_PBM,
165 .priv_data_size = sizeof(PNMContext),
166 .init = ff_pnm_init,
167 .encode2 = pnm_encode_frame,
168 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_MONOWHITE, PIX_FMT_NONE},
169 .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
170 };
171 #endif