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
23 #include "bytestream.h"
27 typedef struct SUNRASTContext {
30 int depth; ///< depth of pixel
31 int length; ///< length (bytes) of image
32 int type; ///< type of file
33 int maptype; ///< type of colormap
34 int maplength; ///< length (bytes) of colormap
38 static void sunrast_image_write_header(AVCodecContext *avctx)
40 SUNRASTContext *s = avctx->priv_data;
42 bytestream2_put_be32u(&s->p, RAS_MAGIC);
43 bytestream2_put_be32u(&s->p, avctx->width);
44 bytestream2_put_be32u(&s->p, avctx->height);
45 bytestream2_put_be32u(&s->p, s->depth);
46 bytestream2_put_be32u(&s->p, s->length);
47 bytestream2_put_be32u(&s->p, s->type);
48 bytestream2_put_be32u(&s->p, s->maptype);
49 bytestream2_put_be32u(&s->p, s->maplength);
52 static void sunrast_image_write_image(AVCodecContext *avctx,
53 const uint8_t *pixels,
54 const uint32_t *palette_data,
57 SUNRASTContext *s = avctx->priv_data;
61 if (s->maplength) { // palettized
62 PutByteContext pb_r, pb_g;
63 int len = s->maplength / 3;
66 bytestream2_skip_p(&s->p, len);
68 bytestream2_skip_p(&s->p, len);
70 for (x = 0; x < len; x++) {
71 uint32_t pixel = palette_data[x];
73 bytestream2_put_byteu(&pb_r, (pixel >> 16) & 0xFF);
74 bytestream2_put_byteu(&pb_g, (pixel >> 8) & 0xFF);
75 bytestream2_put_byteu(&s->p, pixel & 0xFF);
79 len = (s->depth * avctx->width + 7) >> 3;
80 alen = len + (len & 1);
83 if (s->type == RT_BYTE_ENCODED) {
84 uint8_t value, value2;
86 const uint8_t *start = linesize < 0 ? pixels + (avctx->height - 1) * linesize
88 const uint8_t *end = linesize < 0 ? pixels - linesize
89 : pixels + avctx->height * linesize;
93 #define GET_VALUE ptr >= end || ptr < start ? 0 : x >= len ? ptr[len-1] : ptr[x]
97 while (ptr < end && ptr >= start) {
107 while (value2 == value && run < 256 && ptr < end && ptr >= start) {
117 if (run > 2 || value == RLE_TRIGGER) {
118 bytestream2_put_byteu(&s->p, RLE_TRIGGER);
119 bytestream2_put_byteu(&s->p, run - 1);
121 bytestream2_put_byteu(&s->p, value);
122 } else if (run == 1) {
123 bytestream2_put_byteu(&s->p, value);
125 bytestream2_put_be16u(&s->p, (value << 8) | value);
128 // update data length for header
129 s->length = bytestream2_tell_p(&s->p) - 32 - s->maplength;
132 for (y = 0; y < avctx->height; y++) {
133 bytestream2_put_buffer(&s->p, ptr, len);
135 bytestream2_put_byteu(&s->p, 0);
141 static av_cold int sunrast_encode_init(AVCodecContext *avctx)
143 SUNRASTContext *s = avctx->priv_data;
145 switch (avctx->coder_type) {
146 case FF_CODER_TYPE_RLE:
147 s->type = RT_BYTE_ENCODED;
149 case FF_CODER_TYPE_RAW:
150 s->type = RT_STANDARD;
153 av_log(avctx, AV_LOG_ERROR, "invalid coder_type\n");
154 return AVERROR(EINVAL);
157 avctx->coded_frame = &s->picture;
158 avctx->coded_frame->key_frame = 1;
159 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
160 s->maptype = RMT_NONE;
163 switch (avctx->pix_fmt) {
164 case PIX_FMT_MONOWHITE:
168 s->maptype = RMT_EQUAL_RGB;
169 s->maplength = 3 * 256;
179 s->length = avctx->height * (FFALIGN(avctx->width * s->depth, 16) >> 3);
180 s->size = 32 + s->maplength +
181 s->length * (s->type == RT_BYTE_ENCODED ? 2 : 1);
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_packet(avpkt, s->size)) < 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 static const AVCodecDefault sunrast_defaults[] = {
215 AVCodec ff_sunrast_encoder = {
217 .type = AVMEDIA_TYPE_VIDEO,
218 .id = CODEC_ID_SUNRAST,
219 .priv_data_size = sizeof(SUNRASTContext),
220 .init = sunrast_encode_init,
221 .encode2 = sunrast_encode_frame,
222 .defaults = sunrast_defaults,
223 .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_BGR24,
228 .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"),