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
23 #include "bytestream.h"
27 typedef struct SUNRASTContext {
29 int depth; ///< depth of pixel
30 int length; ///< length (bytes) of image
31 int type; ///< type of file
32 int maptype; ///< type of colormap
33 int maplength; ///< length (bytes) of colormap
37 static void sunrast_image_write_header(AVCodecContext *avctx)
39 SUNRASTContext *s = avctx->priv_data;
41 bytestream2_put_be32u(&s->p, RAS_MAGIC);
42 bytestream2_put_be32u(&s->p, avctx->width);
43 bytestream2_put_be32u(&s->p, avctx->height);
44 bytestream2_put_be32u(&s->p, s->depth);
45 bytestream2_put_be32u(&s->p, s->length);
46 bytestream2_put_be32u(&s->p, s->type);
47 bytestream2_put_be32u(&s->p, s->maptype);
48 bytestream2_put_be32u(&s->p, s->maplength);
51 static void sunrast_image_write_image(AVCodecContext *avctx,
52 const uint8_t *pixels,
53 const uint32_t *palette_data,
56 SUNRASTContext *s = avctx->priv_data;
60 if (s->maplength) { // palettized
61 PutByteContext pb_r, pb_g;
62 int len = s->maplength / 3;
65 bytestream2_skip_p(&s->p, len);
67 bytestream2_skip_p(&s->p, len);
69 for (x = 0; x < len; x++) {
70 uint32_t pixel = palette_data[x];
72 bytestream2_put_byteu(&pb_r, (pixel >> 16) & 0xFF);
73 bytestream2_put_byteu(&pb_g, (pixel >> 8) & 0xFF);
74 bytestream2_put_byteu(&s->p, pixel & 0xFF);
78 len = (s->depth * avctx->width + 7) >> 3;
79 alen = len + (len & 1);
82 if (s->type == RT_BYTE_ENCODED) {
83 uint8_t value, value2;
88 #define GET_VALUE y >= avctx->height ? 0 : x >= len ? ptr[len-1] : ptr[x]
92 while (y < avctx->height) {
102 while (value2 == value && run < 256 && y < avctx->height) {
107 ptr += linesize, y++;
112 if (run > 2 || value == RLE_TRIGGER) {
113 bytestream2_put_byteu(&s->p, RLE_TRIGGER);
114 bytestream2_put_byteu(&s->p, run - 1);
116 bytestream2_put_byteu(&s->p, value);
117 } else if (run == 1) {
118 bytestream2_put_byteu(&s->p, value);
120 bytestream2_put_be16u(&s->p, (value << 8) | value);
123 // update data length for header
124 s->length = bytestream2_tell_p(&s->p) - 32 - s->maplength;
126 for (y = 0; y < avctx->height; y++) {
127 bytestream2_put_buffer(&s->p, ptr, len);
129 bytestream2_put_byteu(&s->p, 0);
135 static av_cold int sunrast_encode_init(AVCodecContext *avctx)
137 SUNRASTContext *s = avctx->priv_data;
139 switch (avctx->coder_type) {
140 case FF_CODER_TYPE_RLE:
141 s->type = RT_BYTE_ENCODED;
143 case FF_CODER_TYPE_RAW:
144 s->type = RT_STANDARD;
147 av_log(avctx, AV_LOG_ERROR, "invalid coder_type\n");
148 return AVERROR(EINVAL);
151 s->maptype = RMT_NONE;
154 switch (avctx->pix_fmt) {
155 case AV_PIX_FMT_MONOWHITE:
158 case AV_PIX_FMT_PAL8 :
159 s->maptype = RMT_EQUAL_RGB;
160 s->maplength = 3 * 256;
161 case AV_PIX_FMT_GRAY8:
164 case AV_PIX_FMT_BGR24:
170 s->length = avctx->height * (FFALIGN(avctx->width * s->depth, 16) >> 3);
171 s->size = 32 + s->maplength +
172 s->length * (s->type == RT_BYTE_ENCODED ? 2 : 1);
177 static int sunrast_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
178 const AVFrame *frame, int *got_packet_ptr)
180 SUNRASTContext *s = avctx->priv_data;
183 if ((ret = ff_alloc_packet2(avctx, avpkt, s->size)) < 0)
186 bytestream2_init_writer(&s->p, avpkt->data, avpkt->size);
187 sunrast_image_write_header(avctx);
188 sunrast_image_write_image(avctx, frame->data[0],
189 (const uint32_t *)frame->data[1],
191 // update data length in header after RLE
192 if (s->type == RT_BYTE_ENCODED)
193 AV_WB32(&avpkt->data[16], s->length);
196 avpkt->flags |= AV_PKT_FLAG_KEY;
197 avpkt->size = bytestream2_tell_p(&s->p);
201 static const AVCodecDefault sunrast_defaults[] = {
206 AVCodec ff_sunrast_encoder = {
208 .type = AVMEDIA_TYPE_VIDEO,
209 .id = AV_CODEC_ID_SUNRAST,
210 .priv_data_size = sizeof(SUNRASTContext),
211 .init = sunrast_encode_init,
212 .encode2 = sunrast_encode_frame,
213 .defaults = sunrast_defaults,
214 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24,
217 AV_PIX_FMT_MONOWHITE,
219 .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"),