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path: root/libavcodec/pnmenc.c (plain)
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1/*
2 * PNM 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/imgutils.h"
23#include "libavutil/pixdesc.h"
24#include "avcodec.h"
25#include "internal.h"
26
27static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
28 const AVFrame *p, int *got_packet)
29{
30 uint8_t *bytestream, *bytestream_start, *bytestream_end;
31 int i, h, h1, c, n, linesize, ret;
32 uint8_t *ptr, *ptr1, *ptr2;
33 int size = av_image_get_buffer_size(avctx->pix_fmt,
34 avctx->width, avctx->height, 1);
35
36 if ((ret = ff_alloc_packet2(avctx, pkt, size + 200, 0)) < 0)
37 return ret;
38
39 bytestream_start =
40 bytestream = pkt->data;
41 bytestream_end = pkt->data + pkt->size;
42
43 h = avctx->height;
44 h1 = h;
45 switch (avctx->pix_fmt) {
46 case AV_PIX_FMT_MONOWHITE:
47 c = '4';
48 n = (avctx->width + 7) >> 3;
49 break;
50 case AV_PIX_FMT_GRAY8:
51 c = '5';
52 n = avctx->width;
53 break;
54 case AV_PIX_FMT_GRAY16BE:
55 c = '5';
56 n = avctx->width * 2;
57 break;
58 case AV_PIX_FMT_RGB24:
59 c = '6';
60 n = avctx->width * 3;
61 break;
62 case AV_PIX_FMT_RGB48BE:
63 c = '6';
64 n = avctx->width * 6;
65 break;
66 case AV_PIX_FMT_YUV420P:
67 if (avctx->width & 1 || avctx->height & 1) {
68 av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n");
69 return AVERROR(EINVAL);
70 }
71 c = '5';
72 n = avctx->width;
73 h1 = (h * 3) / 2;
74 break;
75 case AV_PIX_FMT_YUV420P16BE:
76 c = '5';
77 n = avctx->width * 2;
78 h1 = (h * 3) / 2;
79 break;
80 default:
81 return -1;
82 }
83 snprintf(bytestream, bytestream_end - bytestream,
84 "P%c\n%d %d\n", c, avctx->width, h1);
85 bytestream += strlen(bytestream);
86 if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) {
87 int maxdepth = (1 << av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth) - 1;
88 snprintf(bytestream, bytestream_end - bytestream,
89 "%d\n", maxdepth);
90 bytestream += strlen(bytestream);
91 }
92
93 ptr = p->data[0];
94 linesize = p->linesize[0];
95 for (i = 0; i < h; i++) {
96 memcpy(bytestream, ptr, n);
97 bytestream += n;
98 ptr += linesize;
99 }
100
101 if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) {
102 h >>= 1;
103 n >>= 1;
104 ptr1 = p->data[1];
105 ptr2 = p->data[2];
106 for (i = 0; i < h; i++) {
107 memcpy(bytestream, ptr1, n);
108 bytestream += n;
109 memcpy(bytestream, ptr2, n);
110 bytestream += n;
111 ptr1 += p->linesize[1];
112 ptr2 += p->linesize[2];
113 }
114 }
115 pkt->size = bytestream - bytestream_start;
116 pkt->flags |= AV_PKT_FLAG_KEY;
117 *got_packet = 1;
118
119 return 0;
120}
121
122static av_cold int pnm_encode_init(AVCodecContext *avctx)
123{
124#if FF_API_CODED_FRAME
125FF_DISABLE_DEPRECATION_WARNINGS
126 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
127 avctx->coded_frame->key_frame = 1;
128FF_ENABLE_DEPRECATION_WARNINGS
129#endif
130
131 return 0;
132}
133
134#if CONFIG_PGM_ENCODER
135AVCodec ff_pgm_encoder = {
136 .name = "pgm",
137 .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
138 .type = AVMEDIA_TYPE_VIDEO,
139 .id = AV_CODEC_ID_PGM,
140 .init = pnm_encode_init,
141 .encode2 = pnm_encode_frame,
142 .pix_fmts = (const enum AVPixelFormat[]){
143 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE
144 },
145};
146#endif
147
148#if CONFIG_PGMYUV_ENCODER
149AVCodec ff_pgmyuv_encoder = {
150 .name = "pgmyuv",
151 .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
152 .type = AVMEDIA_TYPE_VIDEO,
153 .id = AV_CODEC_ID_PGMYUV,
154 .init = pnm_encode_init,
155 .encode2 = pnm_encode_frame,
156 .pix_fmts = (const enum AVPixelFormat[]){
157 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_NONE
158 },
159};
160#endif
161
162#if CONFIG_PPM_ENCODER
163AVCodec ff_ppm_encoder = {
164 .name = "ppm",
165 .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
166 .type = AVMEDIA_TYPE_VIDEO,
167 .id = AV_CODEC_ID_PPM,
168 .init = pnm_encode_init,
169 .encode2 = pnm_encode_frame,
170 .pix_fmts = (const enum AVPixelFormat[]){
171 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_NONE
172 },
173};
174#endif
175
176#if CONFIG_PBM_ENCODER
177AVCodec ff_pbm_encoder = {
178 .name = "pbm",
179 .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
180 .type = AVMEDIA_TYPE_VIDEO,
181 .id = AV_CODEC_ID_PBM,
182 .init = pnm_encode_init,
183 .encode2 = pnm_encode_frame,
184 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE,
185 AV_PIX_FMT_NONE },
186};
187#endif
188
generated by cgit at 2024-05-17 04:11:42 (GMT)