a379531613f4983821605dd166676c89d19d436c
[libav.git] / libavcodec / dsicinav.c
1 /*
2 * Delphine Software International CIN Audio/Video Decoders
3 * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
4 *
5 * This file is part of Libav.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 /**
23 * @file
24 * Delphine Software International CIN audio/video decoders
25 */
26
27 #include "avcodec.h"
28 #include "bytestream.h"
29 #include "mathops.h"
30
31
32 typedef enum CinVideoBitmapIndex {
33 CIN_CUR_BMP = 0, /* current */
34 CIN_PRE_BMP = 1, /* previous */
35 CIN_INT_BMP = 2 /* intermediate */
36 } CinVideoBitmapIndex;
37
38 typedef struct CinVideoContext {
39 AVCodecContext *avctx;
40 AVFrame frame;
41 unsigned int bitmap_size;
42 uint32_t palette[256];
43 uint8_t *bitmap_table[3];
44 } CinVideoContext;
45
46 typedef struct CinAudioContext {
47 AVFrame frame;
48 int initial_decode_frame;
49 int delta;
50 } CinAudioContext;
51
52
53 /* table defining a geometric sequence with multiplier = 32767 ^ (1 / 128) */
54 static const int16_t cinaudio_delta16_table[256] = {
55 0, 0, 0, 0, 0, 0, 0, 0,
56 0, 0, 0, 0, 0, 0, 0, 0,
57 0, 0, 0, -30210, -27853, -25680, -23677, -21829,
58 -20126, -18556, -17108, -15774, -14543, -13408, -12362, -11398,
59 -10508, -9689, -8933, -8236, -7593, -7001, -6455, -5951,
60 -5487, -5059, -4664, -4300, -3964, -3655, -3370, -3107,
61 -2865, -2641, -2435, -2245, -2070, -1908, -1759, -1622,
62 -1495, -1379, -1271, -1172, -1080, -996, -918, -847,
63 -781, -720, -663, -612, -564, -520, -479, -442,
64 -407, -376, -346, -319, -294, -271, -250, -230,
65 -212, -196, -181, -166, -153, -141, -130, -120,
66 -111, -102, -94, -87, -80, -74, -68, -62,
67 -58, -53, -49, -45, -41, -38, -35, -32,
68 -30, -27, -25, -23, -21, -20, -18, -17,
69 -15, -14, -13, -12, -11, -10, -9, -8,
70 -7, -6, -5, -4, -3, -2, -1, 0,
71 0, 1, 2, 3, 4, 5, 6, 7,
72 8, 9, 10, 11, 12, 13, 14, 15,
73 17, 18, 20, 21, 23, 25, 27, 30,
74 32, 35, 38, 41, 45, 49, 53, 58,
75 62, 68, 74, 80, 87, 94, 102, 111,
76 120, 130, 141, 153, 166, 181, 196, 212,
77 230, 250, 271, 294, 319, 346, 376, 407,
78 442, 479, 520, 564, 612, 663, 720, 781,
79 847, 918, 996, 1080, 1172, 1271, 1379, 1495,
80 1622, 1759, 1908, 2070, 2245, 2435, 2641, 2865,
81 3107, 3370, 3655, 3964, 4300, 4664, 5059, 5487,
82 5951, 6455, 7001, 7593, 8236, 8933, 9689, 10508,
83 11398, 12362, 13408, 14543, 15774, 17108, 18556, 20126,
84 21829, 23677, 25680, 27853, 30210, 0, 0, 0,
85 0, 0, 0, 0, 0, 0, 0, 0,
86 0, 0, 0, 0, 0, 0, 0, 0
87 };
88
89
90 static av_cold int cinvideo_decode_init(AVCodecContext *avctx)
91 {
92 CinVideoContext *cin = avctx->priv_data;
93 unsigned int i;
94
95 cin->avctx = avctx;
96 avctx->pix_fmt = PIX_FMT_PAL8;
97
98 cin->frame.data[0] = NULL;
99
100 cin->bitmap_size = avctx->width * avctx->height;
101 for (i = 0; i < 3; ++i) {
102 cin->bitmap_table[i] = av_mallocz(cin->bitmap_size);
103 if (!cin->bitmap_table[i])
104 av_log(avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n");
105 }
106
107 return 0;
108 }
109
110 static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst, int size)
111 {
112 while (size--)
113 *dst++ += *src++;
114 }
115
116 static int cin_decode_huffman(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
117 {
118 int b, huff_code = 0;
119 unsigned char huff_code_table[15];
120 unsigned char *dst_cur = dst;
121 unsigned char *dst_end = dst + dst_size;
122 const unsigned char *src_end = src + src_size;
123
124 memcpy(huff_code_table, src, 15); src += 15; src_size -= 15;
125
126 while (src < src_end) {
127 huff_code = *src++;
128 if ((huff_code >> 4) == 15) {
129 b = huff_code << 4;
130 huff_code = *src++;
131 *dst_cur++ = b | (huff_code >> 4);
132 } else
133 *dst_cur++ = huff_code_table[huff_code >> 4];
134 if (dst_cur >= dst_end)
135 break;
136
137 huff_code &= 15;
138 if (huff_code == 15) {
139 *dst_cur++ = *src++;
140 } else
141 *dst_cur++ = huff_code_table[huff_code];
142 if (dst_cur >= dst_end)
143 break;
144 }
145
146 return dst_cur - dst;
147 }
148
149 static int cin_decode_lzss(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
150 {
151 uint16_t cmd;
152 int i, sz, offset, code;
153 unsigned char *dst_end = dst + dst_size, *dst_start = dst;
154 const unsigned char *src_end = src + src_size;
155
156 while (src < src_end && dst < dst_end) {
157 code = *src++;
158 for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) {
159 if (code & (1 << i)) {
160 *dst++ = *src++;
161 } else {
162 cmd = AV_RL16(src); src += 2;
163 offset = cmd >> 4;
164 if ((int) (dst - dst_start) < offset + 1)
165 return AVERROR_INVALIDDATA;
166 sz = (cmd & 0xF) + 2;
167 /* don't use memcpy/memmove here as the decoding routine (ab)uses */
168 /* buffer overlappings to repeat bytes in the destination */
169 sz = FFMIN(sz, dst_end - dst);
170 while (sz--) {
171 *dst = *(dst - offset - 1);
172 ++dst;
173 }
174 }
175 }
176 }
177
178 return 0;
179 }
180
181 static void cin_decode_rle(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
182 {
183 int len, code;
184 unsigned char *dst_end = dst + dst_size;
185 const unsigned char *src_end = src + src_size;
186
187 while (src < src_end && dst < dst_end) {
188 code = *src++;
189 if (code & 0x80) {
190 len = code - 0x7F;
191 memset(dst, *src++, FFMIN(len, dst_end - dst));
192 } else {
193 len = code + 1;
194 memcpy(dst, src, FFMIN(len, dst_end - dst));
195 src += len;
196 }
197 dst += len;
198 }
199 }
200
201 static int cinvideo_decode_frame(AVCodecContext *avctx,
202 void *data, int *data_size,
203 AVPacket *avpkt)
204 {
205 const uint8_t *buf = avpkt->data;
206 int buf_size = avpkt->size;
207 CinVideoContext *cin = avctx->priv_data;
208 int i, y, palette_type, palette_colors_count, bitmap_frame_type, bitmap_frame_size, res = 0;
209
210 palette_type = buf[0];
211 palette_colors_count = AV_RL16(buf+1);
212 bitmap_frame_type = buf[3];
213 buf += 4;
214
215 bitmap_frame_size = buf_size - 4;
216
217 /* handle palette */
218 if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0)))
219 return AVERROR_INVALIDDATA;
220 if (palette_type == 0) {
221 if (palette_colors_count > 256)
222 return AVERROR_INVALIDDATA;
223 for (i = 0; i < palette_colors_count; ++i) {
224 cin->palette[i] = bytestream_get_le24(&buf);
225 bitmap_frame_size -= 3;
226 }
227 } else {
228 for (i = 0; i < palette_colors_count; ++i) {
229 cin->palette[buf[0]] = AV_RL24(buf+1);
230 buf += 4;
231 bitmap_frame_size -= 4;
232 }
233 }
234
235 /* note: the decoding routines below assumes that surface.width = surface.pitch */
236 switch (bitmap_frame_type) {
237 case 9:
238 cin_decode_rle(buf, bitmap_frame_size,
239 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
240 break;
241 case 34:
242 cin_decode_rle(buf, bitmap_frame_size,
243 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
244 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
245 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
246 break;
247 case 35:
248 cin_decode_huffman(buf, bitmap_frame_size,
249 cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
250 cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
251 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
252 break;
253 case 36:
254 bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
255 cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
256 cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
257 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
258 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
259 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
260 break;
261 case 37:
262 cin_decode_huffman(buf, bitmap_frame_size,
263 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
264 break;
265 case 38:
266 res = cin_decode_lzss(buf, bitmap_frame_size,
267 cin->bitmap_table[CIN_CUR_BMP],
268 cin->bitmap_size);
269 if (res < 0)
270 return res;
271 break;
272 case 39:
273 res = cin_decode_lzss(buf, bitmap_frame_size,
274 cin->bitmap_table[CIN_CUR_BMP],
275 cin->bitmap_size);
276 if (res < 0)
277 return res;
278 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
279 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
280 break;
281 }
282
283 cin->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
284 if (avctx->reget_buffer(avctx, &cin->frame)) {
285 av_log(cin->avctx, AV_LOG_ERROR, "delphinecinvideo: reget_buffer() failed to allocate a frame\n");
286 return -1;
287 }
288
289 memcpy(cin->frame.data[1], cin->palette, sizeof(cin->palette));
290 cin->frame.palette_has_changed = 1;
291 for (y = 0; y < cin->avctx->height; ++y)
292 memcpy(cin->frame.data[0] + (cin->avctx->height - 1 - y) * cin->frame.linesize[0],
293 cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width,
294 cin->avctx->width);
295
296 FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_table[CIN_PRE_BMP]);
297
298 *data_size = sizeof(AVFrame);
299 *(AVFrame *)data = cin->frame;
300
301 return buf_size;
302 }
303
304 static av_cold int cinvideo_decode_end(AVCodecContext *avctx)
305 {
306 CinVideoContext *cin = avctx->priv_data;
307 int i;
308
309 if (cin->frame.data[0])
310 avctx->release_buffer(avctx, &cin->frame);
311
312 for (i = 0; i < 3; ++i)
313 av_free(cin->bitmap_table[i]);
314
315 return 0;
316 }
317
318 static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
319 {
320 CinAudioContext *cin = avctx->priv_data;
321
322 if (avctx->channels != 1) {
323 av_log_ask_for_sample(avctx, "Number of channels is not supported\n");
324 return AVERROR_PATCHWELCOME;
325 }
326
327 cin->initial_decode_frame = 1;
328 cin->delta = 0;
329 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
330
331 avcodec_get_frame_defaults(&cin->frame);
332 avctx->coded_frame = &cin->frame;
333
334 return 0;
335 }
336
337 static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
338 int *got_frame_ptr, AVPacket *avpkt)
339 {
340 const uint8_t *buf = avpkt->data;
341 CinAudioContext *cin = avctx->priv_data;
342 const uint8_t *buf_end = buf + avpkt->size;
343 int16_t *samples;
344 int delta, ret;
345
346 /* get output buffer */
347 cin->frame.nb_samples = avpkt->size - cin->initial_decode_frame;
348 if ((ret = avctx->get_buffer(avctx, &cin->frame)) < 0) {
349 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
350 return ret;
351 }
352 samples = (int16_t *)cin->frame.data[0];
353
354 delta = cin->delta;
355 if (cin->initial_decode_frame) {
356 cin->initial_decode_frame = 0;
357 delta = sign_extend(AV_RL16(buf), 16);
358 buf += 2;
359 *samples++ = delta;
360 }
361 while (buf < buf_end) {
362 delta += cinaudio_delta16_table[*buf++];
363 delta = av_clip_int16(delta);
364 *samples++ = delta;
365 }
366 cin->delta = delta;
367
368 *got_frame_ptr = 1;
369 *(AVFrame *)data = cin->frame;
370
371 return avpkt->size;
372 }
373
374
375 AVCodec ff_dsicinvideo_decoder = {
376 .name = "dsicinvideo",
377 .type = AVMEDIA_TYPE_VIDEO,
378 .id = CODEC_ID_DSICINVIDEO,
379 .priv_data_size = sizeof(CinVideoContext),
380 .init = cinvideo_decode_init,
381 .close = cinvideo_decode_end,
382 .decode = cinvideo_decode_frame,
383 .capabilities = CODEC_CAP_DR1,
384 .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
385 };
386
387 AVCodec ff_dsicinaudio_decoder = {
388 .name = "dsicinaudio",
389 .type = AVMEDIA_TYPE_AUDIO,
390 .id = CODEC_ID_DSICINAUDIO,
391 .priv_data_size = sizeof(CinAudioContext),
392 .init = cinaudio_decode_init,
393 .decode = cinaudio_decode_frame,
394 .capabilities = CODEC_CAP_DR1,
395 .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),
396 };