dsicinav.c
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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 
27 #include "avcodec.h"
28 #include "internal.h"
29 #include "bytestream.h"
30 #include "mathops.h"
31 
32 
33 typedef enum CinVideoBitmapIndex {
34  CIN_CUR_BMP = 0, /* current */
35  CIN_PRE_BMP = 1, /* previous */
36  CIN_INT_BMP = 2 /* intermediate */
38 
39 typedef struct CinVideoContext {
42  unsigned int bitmap_size;
43  uint32_t palette[256];
44  uint8_t *bitmap_table[3];
46 
47 typedef struct CinAudioContext {
50  int delta;
52 
53 
54 /* table defining a geometric sequence with multiplier = 32767 ^ (1 / 128) */
55 static const int16_t cinaudio_delta16_table[256] = {
56  0, 0, 0, 0, 0, 0, 0, 0,
57  0, 0, 0, 0, 0, 0, 0, 0,
58  0, 0, 0, -30210, -27853, -25680, -23677, -21829,
59  -20126, -18556, -17108, -15774, -14543, -13408, -12362, -11398,
60  -10508, -9689, -8933, -8236, -7593, -7001, -6455, -5951,
61  -5487, -5059, -4664, -4300, -3964, -3655, -3370, -3107,
62  -2865, -2641, -2435, -2245, -2070, -1908, -1759, -1622,
63  -1495, -1379, -1271, -1172, -1080, -996, -918, -847,
64  -781, -720, -663, -612, -564, -520, -479, -442,
65  -407, -376, -346, -319, -294, -271, -250, -230,
66  -212, -196, -181, -166, -153, -141, -130, -120,
67  -111, -102, -94, -87, -80, -74, -68, -62,
68  -58, -53, -49, -45, -41, -38, -35, -32,
69  -30, -27, -25, -23, -21, -20, -18, -17,
70  -15, -14, -13, -12, -11, -10, -9, -8,
71  -7, -6, -5, -4, -3, -2, -1, 0,
72  0, 1, 2, 3, 4, 5, 6, 7,
73  8, 9, 10, 11, 12, 13, 14, 15,
74  17, 18, 20, 21, 23, 25, 27, 30,
75  32, 35, 38, 41, 45, 49, 53, 58,
76  62, 68, 74, 80, 87, 94, 102, 111,
77  120, 130, 141, 153, 166, 181, 196, 212,
78  230, 250, 271, 294, 319, 346, 376, 407,
79  442, 479, 520, 564, 612, 663, 720, 781,
80  847, 918, 996, 1080, 1172, 1271, 1379, 1495,
81  1622, 1759, 1908, 2070, 2245, 2435, 2641, 2865,
82  3107, 3370, 3655, 3964, 4300, 4664, 5059, 5487,
83  5951, 6455, 7001, 7593, 8236, 8933, 9689, 10508,
84  11398, 12362, 13408, 14543, 15774, 17108, 18556, 20126,
85  21829, 23677, 25680, 27853, 30210, 0, 0, 0,
86  0, 0, 0, 0, 0, 0, 0, 0,
87  0, 0, 0, 0, 0, 0, 0, 0
88 };
89 
90 
92 {
93  CinVideoContext *cin = avctx->priv_data;
94  unsigned int i;
95 
96  cin->avctx = avctx;
97  avctx->pix_fmt = PIX_FMT_PAL8;
98 
99  cin->frame.data[0] = NULL;
100 
101  cin->bitmap_size = avctx->width * avctx->height;
102  for (i = 0; i < 3; ++i) {
103  cin->bitmap_table[i] = av_mallocz(cin->bitmap_size);
104  if (!cin->bitmap_table[i])
105  av_log(avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n");
106  }
107 
108  return 0;
109 }
110 
111 static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst,
112  int size)
113 {
114  while (size--)
115  *dst++ += *src++;
116 }
117 
118 static int cin_decode_huffman(const unsigned char *src, int src_size,
119  unsigned char *dst, int dst_size)
120 {
121  int b, huff_code = 0;
122  unsigned char huff_code_table[15];
123  unsigned char *dst_cur = dst;
124  unsigned char *dst_end = dst + dst_size;
125  const unsigned char *src_end = src + src_size;
126 
127  memcpy(huff_code_table, src, 15);
128  src += 15;
129  src_size -= 15;
130 
131  while (src < src_end) {
132  huff_code = *src++;
133  if ((huff_code >> 4) == 15) {
134  b = huff_code << 4;
135  huff_code = *src++;
136  *dst_cur++ = b | (huff_code >> 4);
137  } else
138  *dst_cur++ = huff_code_table[huff_code >> 4];
139  if (dst_cur >= dst_end)
140  break;
141 
142  huff_code &= 15;
143  if (huff_code == 15) {
144  *dst_cur++ = *src++;
145  } else
146  *dst_cur++ = huff_code_table[huff_code];
147  if (dst_cur >= dst_end)
148  break;
149  }
150 
151  return dst_cur - dst;
152 }
153 
154 static int cin_decode_lzss(const unsigned char *src, int src_size,
155  unsigned char *dst, int dst_size)
156 {
157  uint16_t cmd;
158  int i, sz, offset, code;
159  unsigned char *dst_end = dst + dst_size, *dst_start = dst;
160  const unsigned char *src_end = src + src_size;
161 
162  while (src < src_end && dst < dst_end) {
163  code = *src++;
164  for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) {
165  if (code & (1 << i)) {
166  *dst++ = *src++;
167  } else {
168  cmd = AV_RL16(src);
169  src += 2;
170  offset = cmd >> 4;
171  if ((int)(dst - dst_start) < offset + 1)
172  return AVERROR_INVALIDDATA;
173  sz = (cmd & 0xF) + 2;
174  /* don't use memcpy/memmove here as the decoding routine
175  * (ab)uses buffer overlappings to repeat bytes in the
176  * destination */
177  sz = FFMIN(sz, dst_end - dst);
178  while (sz--) {
179  *dst = *(dst - offset - 1);
180  ++dst;
181  }
182  }
183  }
184  }
185 
186  return 0;
187 }
188 
189 static void cin_decode_rle(const unsigned char *src, int src_size,
190  unsigned char *dst, int dst_size)
191 {
192  int len, code;
193  unsigned char *dst_end = dst + dst_size;
194  const unsigned char *src_end = src + src_size;
195 
196  while (src < src_end && dst < dst_end) {
197  code = *src++;
198  if (code & 0x80) {
199  if (src >= src_end)
200  break;
201  len = code - 0x7F;
202  memset(dst, *src++, FFMIN(len, dst_end - dst));
203  } else {
204  len = code + 1;
205  memcpy(dst, src, FFMIN3(len, dst_end - dst, src_end - src));
206  src += len;
207  }
208  dst += len;
209  }
210 }
211 
213  void *data, int *data_size,
214  AVPacket *avpkt)
215 {
216  const uint8_t *buf = avpkt->data;
217  int buf_size = avpkt->size;
218  CinVideoContext *cin = avctx->priv_data;
219  int i, y, palette_type, palette_colors_count,
220  bitmap_frame_type, bitmap_frame_size, res = 0;
221 
222  palette_type = buf[0];
223  palette_colors_count = AV_RL16(buf+1);
224  bitmap_frame_type = buf[3];
225  buf += 4;
226 
227  bitmap_frame_size = buf_size - 4;
228 
229  /* handle palette */
230  if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0)))
231  return AVERROR_INVALIDDATA;
232  if (palette_type == 0) {
233  if (palette_colors_count > 256)
234  return AVERROR_INVALIDDATA;
235  for (i = 0; i < palette_colors_count; ++i) {
236  cin->palette[i] = bytestream_get_le24(&buf);
237  bitmap_frame_size -= 3;
238  }
239  } else {
240  for (i = 0; i < palette_colors_count; ++i) {
241  cin->palette[buf[0]] = AV_RL24(buf + 1);
242  buf += 4;
243  bitmap_frame_size -= 4;
244  }
245  }
246 
247  bitmap_frame_size = FFMIN(cin->bitmap_size, bitmap_frame_size);
248 
249  /* note: the decoding routines below assumes that
250  * surface.width = surface.pitch */
251  switch (bitmap_frame_type) {
252  case 9:
253  cin_decode_rle(buf, bitmap_frame_size,
254  cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
255  break;
256  case 34:
257  cin_decode_rle(buf, bitmap_frame_size,
258  cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
260  cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
261  break;
262  case 35:
263  cin_decode_huffman(buf, bitmap_frame_size,
264  cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
265  cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
266  cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
267  break;
268  case 36:
269  bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
271  cin->bitmap_size);
272  cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
273  cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
275  cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
276  break;
277  case 37:
278  cin_decode_huffman(buf, bitmap_frame_size,
279  cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
280  break;
281  case 38:
282  res = cin_decode_lzss(buf, bitmap_frame_size,
284  cin->bitmap_size);
285  if (res < 0)
286  return res;
287  break;
288  case 39:
289  res = cin_decode_lzss(buf, bitmap_frame_size,
291  cin->bitmap_size);
292  if (res < 0)
293  return res;
295  cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
296  break;
297  }
298 
300  if ((res = avctx->reget_buffer(avctx, &cin->frame)) < 0) {
301  av_log(cin->avctx, AV_LOG_ERROR,
302  "delphinecinvideo: reget_buffer() failed to allocate a frame\n");
303  return res;
304  }
305 
306  memcpy(cin->frame.data[1], cin->palette, sizeof(cin->palette));
307  cin->frame.palette_has_changed = 1;
308  for (y = 0; y < cin->avctx->height; ++y)
309  memcpy(cin->frame.data[0] + (cin->avctx->height - 1 - y) * cin->frame.linesize[0],
310  cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width,
311  cin->avctx->width);
312 
313  FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP],
314  cin->bitmap_table[CIN_PRE_BMP]);
315 
316  *data_size = sizeof(AVFrame);
317  *(AVFrame *)data = cin->frame;
318 
319  return buf_size;
320 }
321 
323 {
324  CinVideoContext *cin = avctx->priv_data;
325  int i;
326 
327  if (cin->frame.data[0])
328  avctx->release_buffer(avctx, &cin->frame);
329 
330  for (i = 0; i < 3; ++i)
331  av_free(cin->bitmap_table[i]);
332 
333  return 0;
334 }
335 
337 {
338  CinAudioContext *cin = avctx->priv_data;
339 
340  if (avctx->channels != 1) {
341  av_log_ask_for_sample(avctx, "Number of channels is not supported\n");
342  return AVERROR_PATCHWELCOME;
343  }
344 
345  cin->initial_decode_frame = 1;
346  cin->delta = 0;
347  avctx->sample_fmt = AV_SAMPLE_FMT_S16;
348 
350  avctx->coded_frame = &cin->frame;
351 
352  return 0;
353 }
354 
355 static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
356  int *got_frame_ptr, AVPacket *avpkt)
357 {
358  const uint8_t *buf = avpkt->data;
359  CinAudioContext *cin = avctx->priv_data;
360  const uint8_t *buf_end = buf + avpkt->size;
361  int16_t *samples;
362  int delta, ret;
363 
364  /* get output buffer */
365  cin->frame.nb_samples = avpkt->size - cin->initial_decode_frame;
366  if ((ret = ff_get_buffer(avctx, &cin->frame)) < 0) {
367  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
368  return ret;
369  }
370  samples = (int16_t *)cin->frame.data[0];
371 
372  delta = cin->delta;
373  if (cin->initial_decode_frame) {
374  cin->initial_decode_frame = 0;
375  delta = sign_extend(AV_RL16(buf), 16);
376  buf += 2;
377  *samples++ = delta;
378  }
379  while (buf < buf_end) {
380  delta += cinaudio_delta16_table[*buf++];
381  delta = av_clip_int16(delta);
382  *samples++ = delta;
383  }
384  cin->delta = delta;
385 
386  *got_frame_ptr = 1;
387  *(AVFrame *)data = cin->frame;
388 
389  return avpkt->size;
390 }
391 
392 
394  .name = "dsicinvideo",
395  .type = AVMEDIA_TYPE_VIDEO,
396  .id = CODEC_ID_DSICINVIDEO,
397  .priv_data_size = sizeof(CinVideoContext),
401  .capabilities = CODEC_CAP_DR1,
402  .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
403 };
404 
406  .name = "dsicinaudio",
407  .type = AVMEDIA_TYPE_AUDIO,
408  .id = CODEC_ID_DSICINAUDIO,
409  .priv_data_size = sizeof(CinAudioContext),
412  .capabilities = CODEC_CAP_DR1,
413  .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),
414 };