Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / sgienc.c
CommitLineData
2ba45a60
DM
1/*
2 * SGI image encoder
3 * Todd Kirby <doubleshot@pacbell.net>
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22#include "avcodec.h"
23#include "bytestream.h"
24#include "internal.h"
25#include "sgi.h"
26#include "rle.h"
27
28#define SGI_SINGLE_CHAN 2
29#define SGI_MULTI_CHAN 3
30
31static av_cold int encode_init(AVCodecContext *avctx)
32{
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 av_log(avctx, AV_LOG_ERROR, "SGI does not support resolutions above 65535x65535\n");
37 return AVERROR_INVALIDDATA;
38 }
39
40 avctx->coded_frame = av_frame_alloc();
41 if (!avctx->coded_frame)
42 return AVERROR(ENOMEM);
43
44 return 0;
45}
46
47static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
48 const AVFrame *frame, int *got_packet)
49{
50 const AVFrame * const p = frame;
51 uint8_t *offsettab, *lengthtab, *in_buf, *encode_buf, *buf;
52 int x, y, z, length, tablesize, ret;
53 unsigned int width, height, depth, dimension;
54 unsigned int bytes_per_channel, pixmax, put_be;
55 unsigned char *end_buf;
56
57 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
58 avctx->coded_frame->key_frame = 1;
59
60 width = avctx->width;
61 height = avctx->height;
62 bytes_per_channel = 1;
63 pixmax = 0xFF;
64 put_be = HAVE_BIGENDIAN;
65
66 switch (avctx->pix_fmt) {
67 case AV_PIX_FMT_GRAY8:
68 dimension = SGI_SINGLE_CHAN;
69 depth = SGI_GRAYSCALE;
70 break;
71 case AV_PIX_FMT_RGB24:
72 dimension = SGI_MULTI_CHAN;
73 depth = SGI_RGB;
74 break;
75 case AV_PIX_FMT_RGBA:
76 dimension = SGI_MULTI_CHAN;
77 depth = SGI_RGBA;
78 break;
79 case AV_PIX_FMT_GRAY16LE:
80 put_be = !HAVE_BIGENDIAN;
81 case AV_PIX_FMT_GRAY16BE:
82 avctx->coder_type = FF_CODER_TYPE_RAW;
83 bytes_per_channel = 2;
84 pixmax = 0xFFFF;
85 dimension = SGI_SINGLE_CHAN;
86 depth = SGI_GRAYSCALE;
87 break;
88 case AV_PIX_FMT_RGB48LE:
89 put_be = !HAVE_BIGENDIAN;
90 case AV_PIX_FMT_RGB48BE:
91 avctx->coder_type = FF_CODER_TYPE_RAW;
92 bytes_per_channel = 2;
93 pixmax = 0xFFFF;
94 dimension = SGI_MULTI_CHAN;
95 depth = SGI_RGB;
96 break;
97 case AV_PIX_FMT_RGBA64LE:
98 put_be = !HAVE_BIGENDIAN;
99 case AV_PIX_FMT_RGBA64BE:
100 avctx->coder_type = FF_CODER_TYPE_RAW;
101 bytes_per_channel = 2;
102 pixmax = 0xFFFF;
103 dimension = SGI_MULTI_CHAN;
104 depth = SGI_RGBA;
105 break;
106 default:
107 return AVERROR_INVALIDDATA;
108 }
109
110 tablesize = depth * height * 4;
111 length = SGI_HEADER_SIZE;
112 if (avctx->coder_type == FF_CODER_TYPE_RAW)
113 length += depth * height * width;
114 else // assume ff_rl_encode() produces at most 2x size of input
115 length += tablesize * 2 + depth * height * (2 * width + 1);
116
117 if ((ret = ff_alloc_packet2(avctx, pkt, bytes_per_channel * length)) < 0)
118 return ret;
119 buf = pkt->data;
120 end_buf = pkt->data + pkt->size;
121
122 /* Encode header. */
123 bytestream_put_be16(&buf, SGI_MAGIC);
124 bytestream_put_byte(&buf, avctx->coder_type != FF_CODER_TYPE_RAW); /* RLE 1 - VERBATIM 0*/
125 bytestream_put_byte(&buf, bytes_per_channel);
126 bytestream_put_be16(&buf, dimension);
127 bytestream_put_be16(&buf, width);
128 bytestream_put_be16(&buf, height);
129 bytestream_put_be16(&buf, depth);
130
131 bytestream_put_be32(&buf, 0L); /* pixmin */
132 bytestream_put_be32(&buf, pixmax);
133 bytestream_put_be32(&buf, 0L); /* dummy */
134
135 /* name */
136 memset(buf, 0, SGI_HEADER_SIZE);
137 buf += 80;
138
139 /* colormap */
140 bytestream_put_be32(&buf, 0L);
141
142 /* The rest of the 512 byte header is unused. */
143 buf += 404;
144 offsettab = buf;
145
146 if (avctx->coder_type != FF_CODER_TYPE_RAW) {
147 /* Skip RLE offset table. */
148 buf += tablesize;
149 lengthtab = buf;
150
151 /* Skip RLE length table. */
152 buf += tablesize;
153
154 /* Make an intermediate consecutive buffer. */
155 if (!(encode_buf = av_malloc(width)))
156 return -1;
157
158 for (z = 0; z < depth; z++) {
159 in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
160
161 for (y = 0; y < height; y++) {
162 bytestream_put_be32(&offsettab, buf - pkt->data);
163
164 for (x = 0; x < width; x++)
165 encode_buf[x] = in_buf[depth * x];
166
167 if ((length = ff_rle_encode(buf, end_buf - buf - 1, encode_buf, 1, width, 0, 0, 0x80, 0)) < 1) {
168 av_free(encode_buf);
169 return -1;
170 }
171
172 buf += length;
173 bytestream_put_byte(&buf, 0);
174 bytestream_put_be32(&lengthtab, length + 1);
175 in_buf -= p->linesize[0];
176 }
177 }
178
179 av_free(encode_buf);
180 } else {
181 for (z = 0; z < depth; z++) {
182 in_buf = p->data[0] + p->linesize[0] * (height - 1) + z * bytes_per_channel;
183
184 for (y = 0; y < height; y++) {
185 for (x = 0; x < width * depth; x += depth)
186 if (bytes_per_channel == 1) {
187 bytestream_put_byte(&buf, in_buf[x]);
188 } else {
189 if (put_be) {
190 bytestream_put_be16(&buf, ((uint16_t *)in_buf)[x]);
191 } else {
192 bytestream_put_le16(&buf, ((uint16_t *)in_buf)[x]);
193 }
194 }
195
196 in_buf -= p->linesize[0];
197 }
198 }
199 }
200
201 /* total length */
202 pkt->size = buf - pkt->data;
203 pkt->flags |= AV_PKT_FLAG_KEY;
204 *got_packet = 1;
205
206 return 0;
207}
208
209static av_cold int encode_close(AVCodecContext *avctx)
210{
211 av_frame_free(&avctx->coded_frame);
212 return 0;
213}
214
215AVCodec ff_sgi_encoder = {
216 .name = "sgi",
217 .long_name = NULL_IF_CONFIG_SMALL("SGI image"),
218 .type = AVMEDIA_TYPE_VIDEO,
219 .id = AV_CODEC_ID_SGI,
220 .init = encode_init,
221 .encode2 = encode_frame,
222 .close = encode_close,
223 .pix_fmts = (const enum AVPixelFormat[]) {
224 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA,
225 AV_PIX_FMT_RGB48LE, AV_PIX_FMT_RGB48BE,
226 AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_RGBA64BE,
227 AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY8,
228 AV_PIX_FMT_NONE
229 },
230};