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 {
31 int depth; ///< depth of pixel
32 int length; ///< length (bytes) of image
33 int type; ///< type of file
34 int maptype; ///< type of colormap
35 int maplength; ///< length (bytes) of colormap
39 static void sunrast_image_write_header(AVCodecContext *avctx)
41 SUNRASTContext *s = avctx->priv_data;
43 bytestream2_put_be32u(&s->p, RAS_MAGIC);
44 bytestream2_put_be32u(&s->p, avctx->width);
45 bytestream2_put_be32u(&s->p, avctx->height);
46 bytestream2_put_be32u(&s->p, s->depth);
47 bytestream2_put_be32u(&s->p, s->length);
48 bytestream2_put_be32u(&s->p, s->type);
49 bytestream2_put_be32u(&s->p, s->maptype);
50 bytestream2_put_be32u(&s->p, s->maplength);
53 static void sunrast_image_write_image(AVCodecContext *avctx,
54 const uint8_t *pixels,
55 const uint32_t *palette_data,
58 SUNRASTContext *s = avctx->priv_data;
62 if (s->maplength) { // palettized
63 PutByteContext pb_r, pb_g;
64 int len = s->maplength / 3;
67 bytestream2_skip_p(&s->p, len);
69 bytestream2_skip_p(&s->p, len);
71 for (x = 0; x < len; x++) {
72 uint32_t pixel = palette_data[x];
74 bytestream2_put_byteu(&pb_r, (pixel >> 16) & 0xFF);
75 bytestream2_put_byteu(&pb_g, (pixel >> 8) & 0xFF);
76 bytestream2_put_byteu(&s->p, pixel & 0xFF);
80 len = (s->depth * avctx->width + 7) >> 3;
81 alen = len + (len & 1);
84 if (s->type == RT_BYTE_ENCODED) {
85 uint8_t value, value2;
87 const uint8_t *start = linesize < 0 ? pixels + (avctx->height - 1) * linesize
89 const uint8_t *end = linesize < 0 ? pixels - linesize
90 : pixels + avctx->height * linesize;
94 #define GET_VALUE ptr >= end || ptr < start ? 0 : x >= len ? ptr[len-1] : ptr[x]
98 while (ptr < end && ptr >= start) {
108 while (value2 == value && run < 256 && ptr < end && ptr >= start) {
118 if (run > 2 || value == RLE_TRIGGER) {
119 bytestream2_put_byteu(&s->p, RLE_TRIGGER);
120 bytestream2_put_byteu(&s->p, run - 1);
122 bytestream2_put_byteu(&s->p, value);
123 } else if (run == 1) {
124 bytestream2_put_byteu(&s->p, value);
126 bytestream2_put_be16u(&s->p, (value << 8) | value);
129 // update data length for header
130 s->length = bytestream2_tell_p(&s->p) - 32 - s->maplength;
133 for (y = 0; y < avctx->height; y++) {
134 bytestream2_put_buffer(&s->p, ptr, len);
136 bytestream2_put_byteu(&s->p, 0);
142 static av_cold int sunrast_encode_init(AVCodecContext *avctx)
144 SUNRASTContext *s = avctx->priv_data;
146 #if FF_API_CODER_TYPE
147 FF_DISABLE_DEPRECATION_WARNINGS
148 switch (avctx->coder_type) {
149 case FF_CODER_TYPE_RLE:
150 s->type = RT_BYTE_ENCODED;
152 case FF_CODER_TYPE_RAW:
153 s->type = RT_STANDARD;
156 av_log(avctx, AV_LOG_ERROR, "invalid coder_type\n");
157 return AVERROR(EINVAL);
159 FF_ENABLE_DEPRECATION_WARNINGS
160 if (s->type != RT_BYTE_ENCODED && s->type != RT_STANDARD)
162 // adjust boolean option to RT equivalent
165 #if FF_API_CODED_FRAME
166 FF_DISABLE_DEPRECATION_WARNINGS
167 avctx->coded_frame->key_frame = 1;
168 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
169 FF_ENABLE_DEPRECATION_WARNINGS
171 s->maptype = RMT_NONE;
174 switch (avctx->pix_fmt) {
175 case AV_PIX_FMT_MONOWHITE:
178 case AV_PIX_FMT_PAL8 :
179 s->maptype = RMT_EQUAL_RGB;
180 s->maplength = 3 * 256;
182 case AV_PIX_FMT_GRAY8:
185 case AV_PIX_FMT_BGR24:
191 s->length = avctx->height * (FFALIGN(avctx->width * s->depth, 16) >> 3);
192 s->size = 32 + s->maplength + s->length * s->type;
197 static int sunrast_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
198 const AVFrame *frame, int *got_packet_ptr)
200 SUNRASTContext *s = avctx->priv_data;
203 if ((ret = ff_alloc_packet(avpkt, s->size)) < 0)
206 bytestream2_init_writer(&s->p, avpkt->data, avpkt->size);
207 sunrast_image_write_header(avctx);
208 sunrast_image_write_image(avctx, frame->data[0],
209 (const uint32_t *)frame->data[1],
211 // update data length in header after RLE
212 if (s->type == RT_BYTE_ENCODED)
213 AV_WB32(&avpkt->data[16], s->length);
216 avpkt->flags |= AV_PKT_FLAG_KEY;
217 avpkt->size = bytestream2_tell_p(&s->p);
221 #define OFFSET(x) offsetof(SUNRASTContext, x)
222 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
223 static const AVOption options[] = {
224 { "rle", "Use run-length compression", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
229 static const AVClass utvideo_class = {
230 .class_name = "sunrast",
231 .item_name = av_default_item_name,
233 .version = LIBAVUTIL_VERSION_INT,
236 #if FF_API_CODER_TYPE
237 static const AVCodecDefault sunrast_defaults[] = {
243 AVCodec ff_sunrast_encoder = {
245 .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"),
246 .type = AVMEDIA_TYPE_VIDEO,
247 .id = AV_CODEC_ID_SUNRAST,
248 .priv_data_size = sizeof(SUNRASTContext),
249 .init = sunrast_encode_init,
250 .encode2 = sunrast_encode_frame,
251 #if FF_API_CODER_TYPE
252 .defaults = sunrast_defaults,
254 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24,
257 AV_PIX_FMT_MONOWHITE,