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;
89 #define GET_VALUE y >= avctx->height ? 0 : x >= len ? ptr[len-1] : ptr[x]
93 while (y < avctx->height) {
103 while (value2 == value && run < 256 && y < avctx->height) {
108 ptr += linesize, y++;
113 if (run > 2 || value == RLE_TRIGGER) {
114 bytestream2_put_byteu(&s->p, RLE_TRIGGER);
115 bytestream2_put_byteu(&s->p, run - 1);
117 bytestream2_put_byteu(&s->p, value);
118 } else if (run == 1) {
119 bytestream2_put_byteu(&s->p, value);
121 bytestream2_put_be16u(&s->p, (value << 8) | value);
124 // update data length for header
125 s->length = bytestream2_tell_p(&s->p) - 32 - s->maplength;
127 for (y = 0; y < avctx->height; y++) {
128 bytestream2_put_buffer(&s->p, ptr, len);
130 bytestream2_put_byteu(&s->p, 0);
136 static av_cold int sunrast_encode_init(AVCodecContext *avctx)
138 SUNRASTContext *s = avctx->priv_data;
140 switch (avctx->coder_type) {
141 case FF_CODER_TYPE_RLE:
142 s->type = RT_BYTE_ENCODED;
144 case FF_CODER_TYPE_RAW:
145 s->type = RT_STANDARD;
148 av_log(avctx, AV_LOG_ERROR, "invalid coder_type\n");
149 return AVERROR(EINVAL);
152 avctx->coded_frame = &s->picture;
153 avctx->coded_frame->key_frame = 1;
154 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
155 s->maptype = RMT_NONE;
158 switch (avctx->pix_fmt) {
159 case AV_PIX_FMT_MONOWHITE:
162 case AV_PIX_FMT_PAL8 :
163 s->maptype = RMT_EQUAL_RGB;
164 s->maplength = 3 * 256;
165 case AV_PIX_FMT_GRAY8:
168 case AV_PIX_FMT_BGR24:
174 s->length = avctx->height * (FFALIGN(avctx->width * s->depth, 16) >> 3);
175 s->size = 32 + s->maplength +
176 s->length * (s->type == RT_BYTE_ENCODED ? 2 : 1);
181 static int sunrast_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
182 const AVFrame *frame, int *got_packet_ptr)
184 SUNRASTContext *s = avctx->priv_data;
187 if ((ret = ff_alloc_packet2(avctx, avpkt, s->size)) < 0)
190 bytestream2_init_writer(&s->p, avpkt->data, avpkt->size);
191 sunrast_image_write_header(avctx);
192 sunrast_image_write_image(avctx, frame->data[0],
193 (const uint32_t *)frame->data[1],
195 // update data length in header after RLE
196 if (s->type == RT_BYTE_ENCODED)
197 AV_WB32(&avpkt->data[16], s->length);
200 avpkt->flags |= AV_PKT_FLAG_KEY;
201 avpkt->size = bytestream2_tell_p(&s->p);
205 static const AVCodecDefault sunrast_defaults[] = {
210 AVCodec ff_sunrast_encoder = {
212 .type = AVMEDIA_TYPE_VIDEO,
213 .id = AV_CODEC_ID_SUNRAST,
214 .priv_data_size = sizeof(SUNRASTContext),
215 .init = sunrast_encode_init,
216 .encode2 = sunrast_encode_frame,
217 .defaults = sunrast_defaults,
218 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24,
221 AV_PIX_FMT_MONOWHITE,
223 .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"),