2e4983ce6cc44a1dd7198f81a53ca549db8c3bc7
[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 "libavutil/pixdesc.h"
23 #include "avcodec.h"
24 #include "bytestream.h"
25 #include "internal.h"
26 #include "pnm.h"
27
28
29 static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
30 const AVFrame *pict, int *got_packet)
31 {
32 PNMContext *s = avctx->priv_data;
33 AVFrame * const p = &s->picture;
34 int i, h, h1, c, n, linesize, ret;
35 uint8_t *ptr, *ptr1, *ptr2;
36
37 if ((ret = ff_alloc_packet(pkt, avpicture_get_size(avctx->pix_fmt,
38 avctx->width,
39 avctx->height) + 200)) < 0) {
40 av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
41 return ret;
42 }
43
44 *p = *pict;
45 p->pict_type = AV_PICTURE_TYPE_I;
46 p->key_frame = 1;
47
48 s->bytestream_start =
49 s->bytestream = pkt->data;
50 s->bytestream_end = pkt->data + pkt->size;
51
52 h = avctx->height;
53 h1 = h;
54 switch (avctx->pix_fmt) {
55 case AV_PIX_FMT_MONOWHITE:
56 c = '4';
57 n = (avctx->width + 7) >> 3;
58 break;
59 case AV_PIX_FMT_GRAY8:
60 c = '5';
61 n = avctx->width;
62 break;
63 case AV_PIX_FMT_GRAY16BE:
64 c = '5';
65 n = avctx->width * 2;
66 break;
67 case AV_PIX_FMT_RGB24:
68 c = '6';
69 n = avctx->width * 3;
70 break;
71 case AV_PIX_FMT_RGB48BE:
72 c = '6';
73 n = avctx->width * 6;
74 break;
75 case AV_PIX_FMT_YUV420P:
76 c = '5';
77 n = avctx->width;
78 h1 = (h * 3) / 2;
79 break;
80 case AV_PIX_FMT_YUV420P16BE:
81 c = '5';
82 n = avctx->width * 2;
83 h1 = (h * 3) / 2;
84 break;
85 default:
86 return -1;
87 }
88 snprintf(s->bytestream, s->bytestream_end - s->bytestream,
89 "P%c\n%d %d\n", c, avctx->width, h1);
90 s->bytestream += strlen(s->bytestream);
91 if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) {
92 int maxdepth = (1 << (av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1)) - 1;
93 snprintf(s->bytestream, s->bytestream_end - s->bytestream,
94 "%d\n", maxdepth);
95 s->bytestream += strlen(s->bytestream);
96 }
97
98 ptr = p->data[0];
99 linesize = p->linesize[0];
100 for (i = 0; i < h; i++) {
101 memcpy(s->bytestream, ptr, n);
102 s->bytestream += n;
103 ptr += linesize;
104 }
105
106 if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) {
107 h >>= 1;
108 n >>= 1;
109 ptr1 = p->data[1];
110 ptr2 = p->data[2];
111 for (i = 0; i < h; i++) {
112 memcpy(s->bytestream, ptr1, n);
113 s->bytestream += n;
114 memcpy(s->bytestream, ptr2, n);
115 s->bytestream += n;
116 ptr1 += p->linesize[1];
117 ptr2 += p->linesize[2];
118 }
119 }
120 pkt->size = s->bytestream - s->bytestream_start;
121 pkt->flags |= AV_PKT_FLAG_KEY;
122 *got_packet = 1;
123
124 return 0;
125 }
126
127
128 #if CONFIG_PGM_ENCODER
129 AVCodec ff_pgm_encoder = {
130 .name = "pgm",
131 .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
132 .type = AVMEDIA_TYPE_VIDEO,
133 .id = AV_CODEC_ID_PGM,
134 .priv_data_size = sizeof(PNMContext),
135 .init = ff_pnm_init,
136 .encode2 = pnm_encode_frame,
137 .pix_fmts = (const enum AVPixelFormat[]){
138 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE
139 },
140 };
141 #endif
142
143 #if CONFIG_PGMYUV_ENCODER
144 AVCodec ff_pgmyuv_encoder = {
145 .name = "pgmyuv",
146 .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
147 .type = AVMEDIA_TYPE_VIDEO,
148 .id = AV_CODEC_ID_PGMYUV,
149 .priv_data_size = sizeof(PNMContext),
150 .init = ff_pnm_init,
151 .encode2 = pnm_encode_frame,
152 .pix_fmts = (const enum AVPixelFormat[]){
153 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_NONE
154 },
155 };
156 #endif
157
158 #if CONFIG_PPM_ENCODER
159 AVCodec ff_ppm_encoder = {
160 .name = "ppm",
161 .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
162 .type = AVMEDIA_TYPE_VIDEO,
163 .id = AV_CODEC_ID_PPM,
164 .priv_data_size = sizeof(PNMContext),
165 .init = ff_pnm_init,
166 .encode2 = pnm_encode_frame,
167 .pix_fmts = (const enum AVPixelFormat[]){
168 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_NONE
169 },
170 };
171 #endif
172
173 #if CONFIG_PBM_ENCODER
174 AVCodec ff_pbm_encoder = {
175 .name = "pbm",
176 .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
177 .type = AVMEDIA_TYPE_VIDEO,
178 .id = AV_CODEC_ID_PBM,
179 .priv_data_size = sizeof(PNMContext),
180 .init = ff_pnm_init,
181 .encode2 = pnm_encode_frame,
182 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE,
183 AV_PIX_FMT_NONE },
184 };
185 #endif