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/intreadwrite.h"
23 #include "libavutil/imgutils.h"
24 #include "libavutil/pixdesc.h"
25 #include "avcodec.h"
26 #include "internal.h"
27
pnm_encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * p,int * got_packet)28 static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
29 const AVFrame *p, int *got_packet)
30 {
31 uint8_t *bytestream, *bytestream_start, *bytestream_end;
32 int i, h, h1, c, n, linesize, ret;
33 uint8_t *ptr, *ptr1, *ptr2;
34 int size = av_image_get_buffer_size(avctx->pix_fmt,
35 avctx->width, avctx->height, 1);
36
37 if ((ret = ff_alloc_packet2(avctx, pkt, size + 200, 0)) < 0)
38 return ret;
39
40 bytestream_start =
41 bytestream = pkt->data;
42 bytestream_end = pkt->data + pkt->size;
43
44 h = avctx->height;
45 h1 = h;
46 switch (avctx->pix_fmt) {
47 case AV_PIX_FMT_MONOWHITE:
48 c = '4';
49 n = (avctx->width + 7) >> 3;
50 break;
51 case AV_PIX_FMT_GRAY8:
52 c = '5';
53 n = avctx->width;
54 break;
55 case AV_PIX_FMT_GRAY16BE:
56 c = '5';
57 n = avctx->width * 2;
58 break;
59 case AV_PIX_FMT_RGB24:
60 c = '6';
61 n = avctx->width * 3;
62 break;
63 case AV_PIX_FMT_RGB48BE:
64 c = '6';
65 n = avctx->width * 6;
66 break;
67 case AV_PIX_FMT_YUV420P:
68 if (avctx->width & 1 || avctx->height & 1) {
69 av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n");
70 return AVERROR(EINVAL);
71 }
72 c = '5';
73 n = avctx->width;
74 h1 = (h * 3) / 2;
75 break;
76 case AV_PIX_FMT_YUV420P16BE:
77 c = '5';
78 n = avctx->width * 2;
79 h1 = (h * 3) / 2;
80 break;
81 case AV_PIX_FMT_GBRPF32:
82 c = 'F';
83 n = avctx->width * 4;
84 break;
85 default:
86 return -1;
87 }
88 snprintf(bytestream, bytestream_end - bytestream,
89 "P%c\n%d %d\n", c, avctx->width, h1);
90 bytestream += strlen(bytestream);
91 if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32)
92 snprintf(bytestream, bytestream_end - bytestream,
93 "%f\n", avctx->pix_fmt == AV_PIX_FMT_GBRPF32BE ? 1.f: -1.f);
94 bytestream += strlen(bytestream);
95 if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE &&
96 avctx->pix_fmt != AV_PIX_FMT_GBRPF32) {
97 int maxdepth = (1 << av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth) - 1;
98 snprintf(bytestream, bytestream_end - bytestream,
99 "%d\n", maxdepth);
100 bytestream += strlen(bytestream);
101 }
102
103 if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32) {
104 float *r = (float *)p->data[2];
105 float *g = (float *)p->data[0];
106 float *b = (float *)p->data[1];
107
108 for (int i = 0; i < avctx->height; i++) {
109 for (int j = 0; j < avctx->width; j++) {
110 AV_WN32(bytestream + 0, av_float2int(r[j]));
111 AV_WN32(bytestream + 4, av_float2int(g[j]));
112 AV_WN32(bytestream + 8, av_float2int(b[j]));
113 bytestream += 12;
114 }
115
116 r += p->linesize[2] / 4;
117 g += p->linesize[0] / 4;
118 b += p->linesize[1] / 4;
119 }
120 } else {
121 ptr = p->data[0];
122 linesize = p->linesize[0];
123 for (i = 0; i < h; i++) {
124 memcpy(bytestream, ptr, n);
125 bytestream += n;
126 ptr += linesize;
127 }
128 }
129
130 if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) {
131 h >>= 1;
132 n >>= 1;
133 ptr1 = p->data[1];
134 ptr2 = p->data[2];
135 for (i = 0; i < h; i++) {
136 memcpy(bytestream, ptr1, n);
137 bytestream += n;
138 memcpy(bytestream, ptr2, n);
139 bytestream += n;
140 ptr1 += p->linesize[1];
141 ptr2 += p->linesize[2];
142 }
143 }
144 pkt->size = bytestream - bytestream_start;
145 pkt->flags |= AV_PKT_FLAG_KEY;
146 *got_packet = 1;
147
148 return 0;
149 }
150
pnm_encode_init(AVCodecContext * avctx)151 static av_cold int pnm_encode_init(AVCodecContext *avctx)
152 {
153 #if FF_API_CODED_FRAME
154 FF_DISABLE_DEPRECATION_WARNINGS
155 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
156 avctx->coded_frame->key_frame = 1;
157 FF_ENABLE_DEPRECATION_WARNINGS
158 #endif
159
160 return 0;
161 }
162
163 #if CONFIG_PGM_ENCODER
164 AVCodec ff_pgm_encoder = {
165 .name = "pgm",
166 .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
167 .type = AVMEDIA_TYPE_VIDEO,
168 .id = AV_CODEC_ID_PGM,
169 .init = pnm_encode_init,
170 .encode2 = pnm_encode_frame,
171 .pix_fmts = (const enum AVPixelFormat[]){
172 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE
173 },
174 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
175 };
176 #endif
177
178 #if CONFIG_PGMYUV_ENCODER
179 AVCodec ff_pgmyuv_encoder = {
180 .name = "pgmyuv",
181 .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
182 .type = AVMEDIA_TYPE_VIDEO,
183 .id = AV_CODEC_ID_PGMYUV,
184 .init = pnm_encode_init,
185 .encode2 = pnm_encode_frame,
186 .pix_fmts = (const enum AVPixelFormat[]){
187 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_NONE
188 },
189 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
190 };
191 #endif
192
193 #if CONFIG_PPM_ENCODER
194 AVCodec ff_ppm_encoder = {
195 .name = "ppm",
196 .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
197 .type = AVMEDIA_TYPE_VIDEO,
198 .id = AV_CODEC_ID_PPM,
199 .init = pnm_encode_init,
200 .encode2 = pnm_encode_frame,
201 .pix_fmts = (const enum AVPixelFormat[]){
202 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_NONE
203 },
204 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
205 };
206 #endif
207
208 #if CONFIG_PBM_ENCODER
209 AVCodec ff_pbm_encoder = {
210 .name = "pbm",
211 .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
212 .type = AVMEDIA_TYPE_VIDEO,
213 .id = AV_CODEC_ID_PBM,
214 .init = pnm_encode_init,
215 .encode2 = pnm_encode_frame,
216 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE,
217 AV_PIX_FMT_NONE },
218 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
219 };
220 #endif
221
222 #if CONFIG_PFM_ENCODER
223 AVCodec ff_pfm_encoder = {
224 .name = "pfm",
225 .long_name = NULL_IF_CONFIG_SMALL("PFM (Portable FloatMap) image"),
226 .type = AVMEDIA_TYPE_VIDEO,
227 .id = AV_CODEC_ID_PFM,
228 .init = pnm_encode_init,
229 .encode2 = pnm_encode_frame,
230 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_GBRPF32,
231 AV_PIX_FMT_NONE },
232 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
233 };
234 #endif
235