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 FFmpeg.
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.
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.
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
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;
90 #define GET_VALUE y >= avctx->height ? 0 : x >= len ? ptr[len-1] : ptr[x]
94 while (y < avctx->height) {
100 ptr += linesize, y++;
104 while (value2 == value && run < 256 && y < avctx->height) {
109 ptr += linesize, y++;
114 if (run > 2 || value == RLE_TRIGGER) {
115 bytestream2_put_byteu(&s->p, RLE_TRIGGER);
116 bytestream2_put_byteu(&s->p, run - 1);
118 bytestream2_put_byteu(&s->p, value);
119 } else if (run == 1) {
120 bytestream2_put_byteu(&s->p, value);
122 bytestream2_put_be16u(&s->p, (value << 8) | value);
125 // update data length for header
126 s->length = bytestream2_tell_p(&s->p) - 32 - s->maplength;
128 for (y = 0; y < avctx->height; y++) {
129 bytestream2_put_buffer(&s->p, ptr, len);
131 bytestream2_put_byteu(&s->p, 0);
137 static av_cold int sunrast_encode_init(AVCodecContext *avctx)
139 SUNRASTContext *s = avctx->priv_data;
141 #if FF_API_CODER_TYPE
142 FF_DISABLE_DEPRECATION_WARNINGS
143 switch (avctx->coder_type) {
144 case FF_CODER_TYPE_RLE:
145 s->type = RT_BYTE_ENCODED;
147 case FF_CODER_TYPE_RAW:
148 s->type = RT_STANDARD;
151 av_log(avctx, AV_LOG_ERROR, "invalid coder_type\n");
152 return AVERROR(EINVAL);
154 FF_ENABLE_DEPRECATION_WARNINGS
155 if (s->type != RT_BYTE_ENCODED && s->type != RT_STANDARD)
157 // adjust boolean option to RT equivalent
160 s->maptype = RMT_NONE;
163 switch (avctx->pix_fmt) {
164 case AV_PIX_FMT_MONOWHITE:
167 case AV_PIX_FMT_PAL8 :
168 s->maptype = RMT_EQUAL_RGB;
169 s->maplength = 3 * 256;
171 case AV_PIX_FMT_GRAY8:
174 case AV_PIX_FMT_BGR24:
180 s->length = avctx->height * (FFALIGN(avctx->width * s->depth, 16) >> 3);
181 s->size = 32 + s->maplength + s->length * s->type;
186 static int sunrast_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
187 const AVFrame *frame, int *got_packet_ptr)
189 SUNRASTContext *s = avctx->priv_data;
192 if ((ret = ff_alloc_packet2(avctx, avpkt, s->size, 0)) < 0)
195 bytestream2_init_writer(&s->p, avpkt->data, avpkt->size);
196 sunrast_image_write_header(avctx);
197 sunrast_image_write_image(avctx, frame->data[0],
198 (const uint32_t *)frame->data[1],
200 // update data length in header after RLE
201 if (s->type == RT_BYTE_ENCODED)
202 AV_WB32(&avpkt->data[16], s->length);
205 avpkt->flags |= AV_PKT_FLAG_KEY;
206 avpkt->size = bytestream2_tell_p(&s->p);
210 #define OFFSET(x) offsetof(SUNRASTContext, x)
211 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
212 static const AVOption options[] = {
213 { "rle", "Use run-length compression", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
218 static const AVClass utvideo_class = {
219 .class_name = "sunrast",
220 .item_name = av_default_item_name,
222 .version = LIBAVUTIL_VERSION_INT,
225 #if FF_API_CODER_TYPE
226 static const AVCodecDefault sunrast_defaults[] = {
232 AVCodec ff_sunrast_encoder = {
234 .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"),
235 .type = AVMEDIA_TYPE_VIDEO,
236 .id = AV_CODEC_ID_SUNRAST,
237 .priv_data_size = sizeof(SUNRASTContext),
238 .init = sunrast_encode_init,
239 .encode2 = sunrast_encode_frame,
240 #if FF_API_CODER_TYPE
241 .defaults = sunrast_defaults,
243 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24,
246 AV_PIX_FMT_MONOWHITE,