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2ba45a60 DM |
1 | /* |
2 | * Sun Rasterfile (.sun/.ras/im{1,8,24}/.sunras) image encoder | |
3 | * Copyright (c) 2012 Aneesh Dogra (lionaneesh) <lionaneesh@gmail.com> | |
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 "bytestream.h" | |
24 | #include "internal.h" | |
25 | #include "sunrast.h" | |
26 | ||
27 | typedef struct SUNRASTContext { | |
28 | PutByteContext p; | |
29 | int depth; ///< depth of pixel | |
30 | int length; ///< length (bytes) of image | |
31 | int type; ///< type of file | |
32 | int maptype; ///< type of colormap | |
33 | int maplength; ///< length (bytes) of colormap | |
34 | int size; | |
35 | } SUNRASTContext; | |
36 | ||
37 | static void sunrast_image_write_header(AVCodecContext *avctx) | |
38 | { | |
39 | SUNRASTContext *s = avctx->priv_data; | |
40 | ||
41 | bytestream2_put_be32u(&s->p, RAS_MAGIC); | |
42 | bytestream2_put_be32u(&s->p, avctx->width); | |
43 | bytestream2_put_be32u(&s->p, avctx->height); | |
44 | bytestream2_put_be32u(&s->p, s->depth); | |
45 | bytestream2_put_be32u(&s->p, s->length); | |
46 | bytestream2_put_be32u(&s->p, s->type); | |
47 | bytestream2_put_be32u(&s->p, s->maptype); | |
48 | bytestream2_put_be32u(&s->p, s->maplength); | |
49 | } | |
50 | ||
51 | static void sunrast_image_write_image(AVCodecContext *avctx, | |
52 | const uint8_t *pixels, | |
53 | const uint32_t *palette_data, | |
54 | int linesize) | |
55 | { | |
56 | SUNRASTContext *s = avctx->priv_data; | |
57 | const uint8_t *ptr; | |
58 | int len, alen, x, y; | |
59 | ||
60 | if (s->maplength) { // palettized | |
61 | PutByteContext pb_r, pb_g; | |
62 | int len = s->maplength / 3; | |
63 | ||
64 | pb_r = s->p; | |
65 | bytestream2_skip_p(&s->p, len); | |
66 | pb_g = s->p; | |
67 | bytestream2_skip_p(&s->p, len); | |
68 | ||
69 | for (x = 0; x < len; x++) { | |
70 | uint32_t pixel = palette_data[x]; | |
71 | ||
72 | bytestream2_put_byteu(&pb_r, (pixel >> 16) & 0xFF); | |
73 | bytestream2_put_byteu(&pb_g, (pixel >> 8) & 0xFF); | |
74 | bytestream2_put_byteu(&s->p, pixel & 0xFF); | |
75 | } | |
76 | } | |
77 | ||
78 | len = (s->depth * avctx->width + 7) >> 3; | |
79 | alen = len + (len & 1); | |
80 | ptr = pixels; | |
81 | ||
82 | if (s->type == RT_BYTE_ENCODED) { | |
83 | uint8_t value, value2; | |
84 | int run; | |
85 | ||
86 | ptr = pixels; | |
87 | ||
88 | #define GET_VALUE y >= avctx->height ? 0 : x >= len ? ptr[len-1] : ptr[x] | |
89 | ||
90 | x = 0, y = 0; | |
91 | value2 = GET_VALUE; | |
92 | while (y < avctx->height) { | |
93 | run = 1; | |
94 | value = value2; | |
95 | x++; | |
96 | if (x >= alen) { | |
97 | x = 0; | |
98 | ptr += linesize, y++; | |
99 | } | |
100 | ||
101 | value2 = GET_VALUE; | |
102 | while (value2 == value && run < 256 && y < avctx->height) { | |
103 | x++; | |
104 | run++; | |
105 | if (x >= alen) { | |
106 | x = 0; | |
107 | ptr += linesize, y++; | |
108 | } | |
109 | value2 = GET_VALUE; | |
110 | } | |
111 | ||
112 | if (run > 2 || value == RLE_TRIGGER) { | |
113 | bytestream2_put_byteu(&s->p, RLE_TRIGGER); | |
114 | bytestream2_put_byteu(&s->p, run - 1); | |
115 | if (run > 1) | |
116 | bytestream2_put_byteu(&s->p, value); | |
117 | } else if (run == 1) { | |
118 | bytestream2_put_byteu(&s->p, value); | |
119 | } else | |
120 | bytestream2_put_be16u(&s->p, (value << 8) | value); | |
121 | } | |
122 | ||
123 | // update data length for header | |
124 | s->length = bytestream2_tell_p(&s->p) - 32 - s->maplength; | |
125 | } else { | |
126 | for (y = 0; y < avctx->height; y++) { | |
127 | bytestream2_put_buffer(&s->p, ptr, len); | |
128 | if (len < alen) | |
129 | bytestream2_put_byteu(&s->p, 0); | |
130 | ptr += linesize; | |
131 | } | |
132 | } | |
133 | } | |
134 | ||
135 | static av_cold int sunrast_encode_init(AVCodecContext *avctx) | |
136 | { | |
137 | SUNRASTContext *s = avctx->priv_data; | |
138 | ||
139 | switch (avctx->coder_type) { | |
140 | case FF_CODER_TYPE_RLE: | |
141 | s->type = RT_BYTE_ENCODED; | |
142 | break; | |
143 | case FF_CODER_TYPE_RAW: | |
144 | s->type = RT_STANDARD; | |
145 | break; | |
146 | default: | |
147 | av_log(avctx, AV_LOG_ERROR, "invalid coder_type\n"); | |
148 | return AVERROR(EINVAL); | |
149 | } | |
150 | ||
151 | s->maptype = RMT_NONE; | |
152 | s->maplength = 0; | |
153 | ||
154 | switch (avctx->pix_fmt) { | |
155 | case AV_PIX_FMT_MONOWHITE: | |
156 | s->depth = 1; | |
157 | break; | |
158 | case AV_PIX_FMT_PAL8 : | |
159 | s->maptype = RMT_EQUAL_RGB; | |
160 | s->maplength = 3 * 256; | |
f6fa7814 | 161 | /* fall-through */ |
2ba45a60 DM |
162 | case AV_PIX_FMT_GRAY8: |
163 | s->depth = 8; | |
164 | break; | |
165 | case AV_PIX_FMT_BGR24: | |
166 | s->depth = 24; | |
167 | break; | |
168 | default: | |
169 | return AVERROR_BUG; | |
170 | } | |
171 | s->length = avctx->height * (FFALIGN(avctx->width * s->depth, 16) >> 3); | |
172 | s->size = 32 + s->maplength + | |
173 | s->length * (s->type == RT_BYTE_ENCODED ? 2 : 1); | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
178 | static int sunrast_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, | |
179 | const AVFrame *frame, int *got_packet_ptr) | |
180 | { | |
181 | SUNRASTContext *s = avctx->priv_data; | |
182 | int ret; | |
183 | ||
184 | if ((ret = ff_alloc_packet2(avctx, avpkt, s->size)) < 0) | |
185 | return ret; | |
186 | ||
187 | bytestream2_init_writer(&s->p, avpkt->data, avpkt->size); | |
188 | sunrast_image_write_header(avctx); | |
189 | sunrast_image_write_image(avctx, frame->data[0], | |
190 | (const uint32_t *)frame->data[1], | |
191 | frame->linesize[0]); | |
192 | // update data length in header after RLE | |
193 | if (s->type == RT_BYTE_ENCODED) | |
194 | AV_WB32(&avpkt->data[16], s->length); | |
195 | ||
196 | *got_packet_ptr = 1; | |
197 | avpkt->flags |= AV_PKT_FLAG_KEY; | |
198 | avpkt->size = bytestream2_tell_p(&s->p); | |
199 | return 0; | |
200 | } | |
201 | ||
202 | static av_cold int sunrast_encode_close(AVCodecContext *avctx) | |
203 | { | |
204 | av_frame_free(&avctx->coded_frame); | |
205 | return 0; | |
206 | } | |
207 | ||
208 | static const AVCodecDefault sunrast_defaults[] = { | |
209 | { "coder", "rle" }, | |
210 | { NULL }, | |
211 | }; | |
212 | ||
213 | AVCodec ff_sunrast_encoder = { | |
214 | .name = "sunrast", | |
215 | .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"), | |
216 | .type = AVMEDIA_TYPE_VIDEO, | |
217 | .id = AV_CODEC_ID_SUNRAST, | |
218 | .priv_data_size = sizeof(SUNRASTContext), | |
219 | .init = sunrast_encode_init, | |
220 | .close = sunrast_encode_close, | |
221 | .encode2 = sunrast_encode_frame, | |
222 | .defaults = sunrast_defaults, | |
223 | .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24, | |
224 | AV_PIX_FMT_PAL8, | |
225 | AV_PIX_FMT_GRAY8, | |
226 | AV_PIX_FMT_MONOWHITE, | |
227 | AV_PIX_FMT_NONE }, | |
228 | }; |