2 * Sun Rasterfile (.sun/.ras/im{1,8,24}/.sunras) image encoder
3 * Copyright (c) 2012 Aneesh Dogra (lionaneesh) <lionaneesh@gmail.com>
5 * This file is part of Libav.
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.
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.
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
22 #include "libavutil/opt.h"
25 #include "bytestream.h"
29 typedef struct SUNRASTContext {
33 int depth; ///< depth of pixel
34 int length; ///< length (bytes) of image
35 int type; ///< type of file
36 int maptype; ///< type of colormap
37 int maplength; ///< length (bytes) of colormap
41 static void sunrast_image_write_header(AVCodecContext *avctx)
43 SUNRASTContext *s = avctx->priv_data;
45 bytestream2_put_be32u(&s->p, RAS_MAGIC);
46 bytestream2_put_be32u(&s->p, avctx->width);
47 bytestream2_put_be32u(&s->p, avctx->height);
48 bytestream2_put_be32u(&s->p, s->depth);
49 bytestream2_put_be32u(&s->p, s->length);
50 bytestream2_put_be32u(&s->p, s->type);
51 bytestream2_put_be32u(&s->p, s->maptype);
52 bytestream2_put_be32u(&s->p, s->maplength);
55 static void sunrast_image_write_image(AVCodecContext *avctx,
56 const uint8_t *pixels,
57 const uint32_t *palette_data,
60 SUNRASTContext *s = avctx->priv_data;
64 if (s->maplength) { // palettized
65 PutByteContext pb_r, pb_g;
66 int len = s->maplength / 3;
69 bytestream2_skip_p(&s->p, len);
71 bytestream2_skip_p(&s->p, len);
73 for (x = 0; x < len; x++) {
74 uint32_t pixel = palette_data[x];
76 bytestream2_put_byteu(&pb_r, (pixel >> 16) & 0xFF);
77 bytestream2_put_byteu(&pb_g, (pixel >> 8) & 0xFF);
78 bytestream2_put_byteu(&s->p, pixel & 0xFF);
82 len = (s->depth * avctx->width + 7) >> 3;
83 alen = len + (len & 1);
86 if (s->type == RT_BYTE_ENCODED) {
87 uint8_t value, value2;
89 const uint8_t *start = linesize < 0 ? pixels + (avctx->height - 1) * linesize
91 const uint8_t *end = linesize < 0 ? pixels - linesize
92 : pixels + avctx->height * linesize;
96 #define GET_VALUE ptr >= end || ptr < start ? 0 : x >= len ? ptr[len-1] : ptr[x]
100 while (ptr < end && ptr >= start) {
110 while (value2 == value && run < 256 && ptr < end && ptr >= start) {
120 if (run > 2 || value == RLE_TRIGGER) {
121 bytestream2_put_byteu(&s->p, RLE_TRIGGER);
122 bytestream2_put_byteu(&s->p, run - 1);
124 bytestream2_put_byteu(&s->p, value);
125 } else if (run == 1) {
126 bytestream2_put_byteu(&s->p, value);
128 bytestream2_put_be16u(&s->p, (value << 8) | value);
131 // update data length for header
132 s->length = bytestream2_tell_p(&s->p) - 32 - s->maplength;
135 for (y = 0; y < avctx->height; y++) {
136 bytestream2_put_buffer(&s->p, ptr, len);
138 bytestream2_put_byteu(&s->p, 0);
144 static av_cold int sunrast_encode_init(AVCodecContext *avctx)
146 SUNRASTContext *s = avctx->priv_data;
148 #if FF_API_CODER_TYPE
149 FF_DISABLE_DEPRECATION_WARNINGS
150 switch (avctx->coder_type) {
151 case FF_CODER_TYPE_RLE:
152 s->type = RT_BYTE_ENCODED;
154 case FF_CODER_TYPE_RAW:
155 s->type = RT_STANDARD;
158 av_log(avctx, AV_LOG_ERROR, "invalid coder_type\n");
159 return AVERROR(EINVAL);
161 FF_ENABLE_DEPRECATION_WARNINGS
162 if (s->type != RT_BYTE_ENCODED && s->type != RT_STANDARD)
164 // adjust boolean option to RT equivalent
167 #if FF_API_CODED_FRAME
168 FF_DISABLE_DEPRECATION_WARNINGS
169 avctx->coded_frame->key_frame = 1;
170 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
171 FF_ENABLE_DEPRECATION_WARNINGS
173 s->maptype = RMT_NONE;
176 switch (avctx->pix_fmt) {
177 case AV_PIX_FMT_MONOWHITE:
180 case AV_PIX_FMT_PAL8 :
181 s->maptype = RMT_EQUAL_RGB;
182 s->maplength = 3 * 256;
184 case AV_PIX_FMT_GRAY8:
187 case AV_PIX_FMT_BGR24:
193 s->length = avctx->height * (FFALIGN(avctx->width * s->depth, 16) >> 3);
194 s->size = 32 + s->maplength + s->length * s->type;
199 static int sunrast_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
200 const AVFrame *frame, int *got_packet_ptr)
202 SUNRASTContext *s = avctx->priv_data;
205 if ((ret = ff_alloc_packet(avpkt, s->size)) < 0)
208 bytestream2_init_writer(&s->p, avpkt->data, avpkt->size);
209 sunrast_image_write_header(avctx);
210 sunrast_image_write_image(avctx, frame->data[0],
211 (const uint32_t *)frame->data[1],
213 // update data length in header after RLE
214 if (s->type == RT_BYTE_ENCODED)
215 AV_WB32(&avpkt->data[16], s->length);
218 avpkt->flags |= AV_PKT_FLAG_KEY;
219 avpkt->size = bytestream2_tell_p(&s->p);
223 #define OFFSET(x) offsetof(SUNRASTContext, x)
224 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
225 static const AVOption options[] = {
226 { "rle", "Use run-length compression", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
231 static const AVClass sunrast_class = {
232 .class_name = "sunrast",
233 .item_name = av_default_item_name,
235 .version = LIBAVUTIL_VERSION_INT,
238 #if FF_API_CODER_TYPE
239 static const AVCodecDefault sunrast_defaults[] = {
245 AVCodec ff_sunrast_encoder = {
247 .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"),
248 .type = AVMEDIA_TYPE_VIDEO,
249 .id = AV_CODEC_ID_SUNRAST,
250 .priv_data_size = sizeof(SUNRASTContext),
251 .priv_class = &sunrast_class,
252 .init = sunrast_encode_init,
253 .encode2 = sunrast_encode_frame,
254 #if FF_API_CODER_TYPE
255 .defaults = sunrast_defaults,
257 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24,
260 AV_PIX_FMT_MONOWHITE,