3 * Todd Kirby <doubleshot@pacbell.net>
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"
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, "SGI does not support resolutions above 65535x65535\n");
41 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
42 const AVFrame *frame, int *got_packet)
44 AVFrame * const p = (AVFrame *)frame;
45 uint8_t *offsettab, *lengthtab, *in_buf, *encode_buf, *buf;
46 int x, y, z, length, tablesize, ret;
47 unsigned int width, height, depth, dimension, bytes_per_channel, pixmax, put_be;
48 unsigned char *end_buf;
50 p->pict_type = AV_PICTURE_TYPE_I;
54 height = avctx->height;
55 bytes_per_channel = 1;
57 put_be = HAVE_BIGENDIAN;
59 switch (avctx->pix_fmt) {
60 case AV_PIX_FMT_GRAY8:
61 dimension = SGI_SINGLE_CHAN;
62 depth = SGI_GRAYSCALE;
64 case AV_PIX_FMT_RGB24:
65 dimension = SGI_MULTI_CHAN;
69 dimension = SGI_MULTI_CHAN;
72 case AV_PIX_FMT_GRAY16LE:
73 put_be = !HAVE_BIGENDIAN;
74 case AV_PIX_FMT_GRAY16BE:
75 avctx->coder_type = FF_CODER_TYPE_RAW;
76 bytes_per_channel = 2;
78 dimension = SGI_SINGLE_CHAN;
79 depth = SGI_GRAYSCALE;
81 case AV_PIX_FMT_RGB48LE:
82 put_be = !HAVE_BIGENDIAN;
83 case AV_PIX_FMT_RGB48BE:
84 avctx->coder_type = FF_CODER_TYPE_RAW;
85 bytes_per_channel = 2;
87 dimension = SGI_MULTI_CHAN;
90 case AV_PIX_FMT_RGBA64LE:
91 put_be = !HAVE_BIGENDIAN;
92 case AV_PIX_FMT_RGBA64BE:
93 avctx->coder_type = FF_CODER_TYPE_RAW;
94 bytes_per_channel = 2;
96 dimension = SGI_MULTI_CHAN;
100 return AVERROR_INVALIDDATA;
103 tablesize = depth * height * 4;
104 length = SGI_HEADER_SIZE;
105 if (avctx->coder_type == FF_CODER_TYPE_RAW)
106 length += depth * height * width;
107 else // assume ff_rl_encode() produces at most 2x size of input
108 length += tablesize * 2 + depth * height * (2 * width + 1);
110 if ((ret = ff_alloc_packet2(avctx, pkt, bytes_per_channel * length)) < 0)
113 end_buf = pkt->data + pkt->size;
116 bytestream_put_be16(&buf, SGI_MAGIC);
117 bytestream_put_byte(&buf, avctx->coder_type != FF_CODER_TYPE_RAW); /* RLE 1 - VERBATIM 0*/
118 bytestream_put_byte(&buf, bytes_per_channel);
119 bytestream_put_be16(&buf, dimension);
120 bytestream_put_be16(&buf, width);
121 bytestream_put_be16(&buf, height);
122 bytestream_put_be16(&buf, depth);
124 bytestream_put_be32(&buf, 0L); /* pixmin */
125 bytestream_put_be32(&buf, pixmax);
126 bytestream_put_be32(&buf, 0L); /* dummy */
129 memset(buf, 0, SGI_HEADER_SIZE);
133 bytestream_put_be32(&buf, 0L);
135 /* The rest of the 512 byte header is unused. */
139 if (avctx->coder_type != FF_CODER_TYPE_RAW) {
140 /* Skip RLE offset table. */
144 /* Skip RLE length table. */
147 /* Make an intermediate consecutive buffer. */
148 if (!(encode_buf = av_malloc(width)))
151 for (z = 0; z < depth; z++) {
152 in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
154 for (y = 0; y < height; y++) {
155 bytestream_put_be32(&offsettab, buf - pkt->data);
157 for (x = 0; x < width; x++)
158 encode_buf[x] = in_buf[depth * x];
160 if ((length = ff_rle_encode(buf, end_buf - buf - 1, encode_buf, 1, width, 0, 0, 0x80, 0)) < 1) {
166 bytestream_put_byte(&buf, 0);
167 bytestream_put_be32(&lengthtab, length + 1);
168 in_buf -= p->linesize[0];
174 for (z = 0; z < depth; z++) {
175 in_buf = p->data[0] + p->linesize[0] * (height - 1) + z * bytes_per_channel;
177 for (y = 0; y < height; y++) {
178 for (x = 0; x < width * depth; x += depth)
179 if (bytes_per_channel == 1) {
180 bytestream_put_byte(&buf, in_buf[x]);
183 bytestream_put_be16(&buf, ((uint16_t *)in_buf)[x]);
185 bytestream_put_le16(&buf, ((uint16_t *)in_buf)[x]);
189 in_buf -= p->linesize[0];
195 pkt->size = buf - pkt->data;
196 pkt->flags |= AV_PKT_FLAG_KEY;
202 AVCodec ff_sgi_encoder = {
204 .type = AVMEDIA_TYPE_VIDEO,
205 .id = AV_CODEC_ID_SGI,
207 .encode2 = encode_frame,
208 .pix_fmts = (const enum AVPixelFormat[]){
209 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA,
210 AV_PIX_FMT_RGB48LE, AV_PIX_FMT_RGB48BE,
211 AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_RGBA64BE,
212 AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE,
213 AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
215 .long_name = NULL_IF_CONFIG_SMALL("SGI image"),