3 * Todd Kirby <doubleshot@pacbell.net>
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"
28 #define SGI_SINGLE_CHAN 2
29 #define SGI_MULTI_CHAN 3
31 static av_cold int encode_init(AVCodecContext *avctx)
33 if (avctx->width > 65535 || avctx->height > 65535) {
34 av_log(avctx, AV_LOG_ERROR,
35 "Unsupported resolution %dx%d.\n", avctx->width, avctx->height);
36 return AVERROR_INVALIDDATA;
42 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
43 const AVFrame *frame, int *got_packet)
45 const AVFrame * const p = frame;
46 uint8_t *offsettab, *lengthtab, *in_buf, *encode_buf, *buf;
47 int x, y, z, length, tablesize, ret;
48 unsigned int width, height, depth, dimension;
49 unsigned int bytes_per_channel, pixmax, put_be;
50 unsigned char *end_buf;
52 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
53 avctx->coded_frame->key_frame = 1;
56 height = avctx->height;
57 bytes_per_channel = 1;
59 put_be = HAVE_BIGENDIAN;
61 switch (avctx->pix_fmt) {
62 case AV_PIX_FMT_GRAY8:
63 dimension = SGI_SINGLE_CHAN;
64 depth = SGI_GRAYSCALE;
66 case AV_PIX_FMT_RGB24:
67 dimension = SGI_MULTI_CHAN;
71 dimension = SGI_MULTI_CHAN;
74 case AV_PIX_FMT_GRAY16LE:
75 put_be = !HAVE_BIGENDIAN;
76 case AV_PIX_FMT_GRAY16BE:
77 avctx->coder_type = FF_CODER_TYPE_RAW;
78 bytes_per_channel = 2;
80 dimension = SGI_SINGLE_CHAN;
81 depth = SGI_GRAYSCALE;
83 case AV_PIX_FMT_RGB48LE:
84 put_be = !HAVE_BIGENDIAN;
85 case AV_PIX_FMT_RGB48BE:
86 avctx->coder_type = FF_CODER_TYPE_RAW;
87 bytes_per_channel = 2;
89 dimension = SGI_MULTI_CHAN;
92 case AV_PIX_FMT_RGBA64LE:
93 put_be = !HAVE_BIGENDIAN;
94 case AV_PIX_FMT_RGBA64BE:
95 avctx->coder_type = FF_CODER_TYPE_RAW;
96 bytes_per_channel = 2;
98 dimension = SGI_MULTI_CHAN;
102 return AVERROR_INVALIDDATA;
105 tablesize = depth * height * 4;
106 length = SGI_HEADER_SIZE;
107 if (avctx->coder_type == FF_CODER_TYPE_RAW)
108 length += depth * height * width;
109 else // assume ff_rl_encode() produces at most 2x size of input
110 length += tablesize * 2 + depth * height * (2 * width + 1);
112 if ((ret = ff_alloc_packet(pkt, bytes_per_channel * length)) < 0) {
113 av_log(avctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n", length);
117 end_buf = pkt->data + pkt->size;
120 bytestream_put_be16(&buf, SGI_MAGIC);
121 bytestream_put_byte(&buf, avctx->coder_type != FF_CODER_TYPE_RAW); /* RLE 1 - VERBATIM 0*/
122 bytestream_put_byte(&buf, bytes_per_channel);
123 bytestream_put_be16(&buf, dimension);
124 bytestream_put_be16(&buf, width);
125 bytestream_put_be16(&buf, height);
126 bytestream_put_be16(&buf, depth);
128 bytestream_put_be32(&buf, 0L); /* pixmin */
129 bytestream_put_be32(&buf, pixmax);
130 bytestream_put_be32(&buf, 0L); /* dummy */
133 memset(buf, 0, SGI_HEADER_SIZE);
137 bytestream_put_be32(&buf, 0L);
139 /* The rest of the 512 byte header is unused. */
143 if (avctx->coder_type != FF_CODER_TYPE_RAW) {
144 /* Skip RLE offset table. */
148 /* Skip RLE length table. */
151 /* Make an intermediate consecutive buffer. */
152 if (!(encode_buf = av_malloc(width)))
155 for (z = 0; z < depth; z++) {
156 in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
158 for (y = 0; y < height; y++) {
159 bytestream_put_be32(&offsettab, buf - pkt->data);
161 for (x = 0; x < width; x++)
162 encode_buf[x] = in_buf[depth * x];
164 if ((length = ff_rle_encode(buf, end_buf - buf - 1, encode_buf, 1, width, 0, 0, 0x80, 0)) < 1) {
170 bytestream_put_byte(&buf, 0);
171 bytestream_put_be32(&lengthtab, length + 1);
172 in_buf -= p->linesize[0];
178 for (z = 0; z < depth; z++) {
179 in_buf = p->data[0] + p->linesize[0] * (height - 1) + z * bytes_per_channel;
181 for (y = 0; y < height; y++) {
182 for (x = 0; x < width * depth; x += depth)
183 if (bytes_per_channel == 1)
184 bytestream_put_byte(&buf, in_buf[x]);
187 bytestream_put_be16(&buf, ((uint16_t *)in_buf)[x]);
189 bytestream_put_le16(&buf, ((uint16_t *)in_buf)[x]);
191 in_buf -= p->linesize[0];
197 pkt->size = buf - pkt->data;
198 pkt->flags |= AV_PKT_FLAG_KEY;
204 AVCodec ff_sgi_encoder = {
206 .long_name = NULL_IF_CONFIG_SMALL("SGI image"),
207 .type = AVMEDIA_TYPE_VIDEO,
208 .id = AV_CODEC_ID_SGI,
210 .encode2 = encode_frame,
211 .pix_fmts = (const enum AVPixelFormat[]) {
212 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA,
213 AV_PIX_FMT_RGB48LE, AV_PIX_FMT_RGB48BE,
214 AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_RGBA64BE,
215 AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY8,