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
23
29
30 #define SGI_SINGLE_CHAN 2
31 #define SGI_MULTI_CHAN 3
32
35
38
40 {
41 if (avctx->
width > 65535 || avctx->
height > 65535) {
43 "Unsupported resolution %dx%d.\n", avctx->
width, avctx->
height);
46 }
47
48 return 0;
49 }
50
53 {
56
57 if (bpp == 1)
58 bytestream2_put = bytestream2_put_byte;
59 else
60 bytestream2_put = bytestream2_put_be16;
61
62 for (x = 0; x <
w; x +=
count) {
63 /* see if we can encode the next set of pixels with RLE */
65 if (count > 1) {
68
69 val = bpp == 1 ? *src :
AV_RB16(src);
70 bytestream2_put(pbc, count);
71 bytestream2_put(pbc, val);
72 } else {
73 int i;
74 /* fall back on uncompressed */
78
79 bytestream2_put(pbc, count + 0x80);
80 for (i = 0; i <
count; i++) {
81 val = bpp == 1 ? src[i] :
AV_RB16(src + i * bpp);
82 bytestream2_put(pbc, val);
83 }
84 }
85
86 src += count * bpp;
87 }
88
90 }
91
94 {
99 int x, y, z,
length, tablesize, ret, i;
101 unsigned int bytes_per_channel, pixmax, put_be;
102
103 #if FF_API_CODED_FRAME
108 #endif
109
110 #if FF_API_CODER_TYPE
115 #endif
116
117 width = avctx->
width;
119 bytes_per_channel = 1;
120 pixmax = 0xFF;
121 put_be = HAVE_BIGENDIAN;
122
127 break;
131 break;
135 break;
137 put_be = !HAVE_BIGENDIAN;
139 bytes_per_channel = 2;
140 pixmax = 0xFFFF;
143 break;
145 put_be = !HAVE_BIGENDIAN;
147 bytes_per_channel = 2;
148 pixmax = 0xFFFF;
151 break;
153 put_be = !HAVE_BIGENDIAN;
155 bytes_per_channel = 2;
156 pixmax = 0xFFFF;
159 break;
160 default:
162 }
163
164 tablesize = depth * height * 4;
167 length += depth * height *
width;
168 else // assume sgi_rle_encode() produces at most 2x size of input
169 length += tablesize * 2 + depth * height * (2 * width + 1);
170
171 if ((ret =
ff_alloc_packet2(avctx, pkt, bytes_per_channel * length, 0)) < 0)
172 return ret;
173
175
176 /* Encode header. */
178 bytestream2_put_byte(&pbc, s->
rle);
/* RLE 1 - VERBATIM 0 */
179 bytestream2_put_byte(&pbc, bytes_per_channel);
180 bytestream2_put_be16(&pbc, dimension);
181 bytestream2_put_be16(&pbc, width);
182 bytestream2_put_be16(&pbc, height);
183 bytestream2_put_be16(&pbc, depth);
184
185 bytestream2_put_be32(&pbc, 0
L);
/* pixmin */
186 bytestream2_put_be32(&pbc, pixmax);
187 bytestream2_put_be32(&pbc, 0
L);
/* dummy */
188
189 /* name */
190 for (i = 0; i < 80; i++)
191 bytestream2_put_byte(&pbc, 0
L);
192
193 /* colormap */
194 bytestream2_put_be32(&pbc, 0
L);
195
196 /* The rest of the 512 byte header is unused. */
197 for (i = 0; i < 404; i++)
198 bytestream2_put_byte(&pbc, 0
L);
199
202
203 /* Skip RLE offset table. */
206
207 /* Skip RLE length table. */
210
211 /* Make an intermediate consecutive buffer. */
212 if (!(encode_buf =
av_malloc(width * bytes_per_channel)))
214
215 for (z = 0; z < depth; z++) {
216 in_buf = p->
data[0] + p->
linesize[0] * (height - 1) + z * bytes_per_channel;
217
218 for (y = 0; y <
height; y++) {
220
221 for (x = 0; x < width * bytes_per_channel; x += bytes_per_channel)
222 encode_buf[x] = in_buf[depth * x];
223
225 bytes_per_channel);
226 if (length < 1) {
229 }
230
231 bytestream2_put_be32(&tablen_pcb, length);
233 }
234 }
235
237 } else {
238 for (z = 0; z < depth; z++) {
239 in_buf = p->
data[0] + p->
linesize[0] * (height - 1) + z * bytes_per_channel;
240
241 for (y = 0; y <
height; y++) {
242 for (x = 0; x < width * depth; x += depth)
243 if (bytes_per_channel == 1)
244 bytestream2_put_byte(&pbc, in_buf[x]);
245 else
246 if (put_be)
247 bytestream2_put_be16(&pbc, ((uint16_t *)in_buf)[x]);
248 else
249 bytestream2_put_le16(&pbc, ((uint16_t *)in_buf)[x]);
250
252 }
253 }
254 }
255
256 /* total length */
259 *got_packet = 1;
260
261 return 0;
262 }
263
264 #define OFFSET(x) offsetof(SgiContext, x)
265 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
268
270 };
271
277 };
278
285 .priv_class = &sgi_class,
294 },
295 };
const char const char void * val
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static const AVClass sgi_class
This structure describes decoded (raw) audio or video data.
int ff_rle_count_pixels(const uint8_t *start, int len, int bpp, int same)
Count up to 127 consecutive pixels which are either all the same or all differ from the previous and ...
#define LIBAVUTIL_VERSION_INT
packed RGB 8:8:8, 24bpp, RGBRGB...
static av_cold int init(AVCodecContext *avctx)
static av_always_inline void bytestream2_init_writer(PutByteContext *p, uint8_t *buf, int buf_size)
const char * av_default_item_name(void *ptr)
Return the context name.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
static const AVOption options[]
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as lit...
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static av_always_inline unsigned int bytestream2_get_bytes_left_p(PutByteContext *p)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
const char * name
Name of the codec implementation.
static av_always_inline int bytestream2_tell_p(PutByteContext *p)
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
int flags
A combination of AV_PKT_FLAG values.
static av_always_inline void bytestream2_skip_p(PutByteContext *p, unsigned int size)
enum AVPictureType pict_type
Picture type of the frame.
int width
picture width / height.
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
static av_cold int encode_init(AVCodecContext *avctx)
attribute_deprecated int coder_type
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
Describe the class of an AVClass context structure.
static enum AVPixelFormat pix_fmts[]
static int sgi_rle_encode(PutByteContext *pbc, const uint8_t *src, int w, int bpp)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
#define SGI_MAGIC
SGI image file signature.
#define FF_DISABLE_DEPRECATION_WARNINGS
common internal api header.
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big...
#define FF_CODER_TYPE_RAW
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
#define FF_ENABLE_DEPRECATION_WARNINGS
Y , 16bpp, little-endian.
int key_frame
1 -> keyframe, 0-> not
AVPixelFormat
Pixel format.
This structure stores compressed data.
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...