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 "libavutil/channel_layout.h"
  28 #include "avcodec.h"
  29 #include "bytestream.h"
  30 #include "internal.h"
  31 #include "mathops.h"
  32
  33
  34 typedef enum CinVideoBitmapIndex {
  35     CIN_CUR_BMP = 0, /* current */
  36     CIN_PRE_BMP = 1, /* previous */
  37     CIN_INT_BMP = 2  /* intermediate */
  38 } CinVideoBitmapIndex;
  39
  40 typedef struct CinVideoContext {
  41     AVCodecContext *avctx;
  42     AVFrame frame;
  43     unsigned int bitmap_size;
  44     uint32_t palette[256];
  45     uint8_t *bitmap_table[3];
  46 } CinVideoContext;
  47
  48 typedef struct CinAudioContext {
  49     int initial_decode_frame;
  50     int delta;
  51 } CinAudioContext;
  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
  91 static av_cold int cinvideo_decode_init(AVCodecContext *avctx)
  92 {
  93     CinVideoContext *cin = avctx->priv_data;
  94     unsigned int i;
  95
  96     cin->avctx = avctx;
  97     avctx->pix_fmt = AV_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, int size)
 112 {
 113     while (size--)
 114         *dst++ += *src++;
 115 }
 116
 117 static int cin_decode_huffman(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
 118 {
 119     int b, huff_code = 0;
 120     unsigned char huff_code_table[15];
 121     unsigned char *dst_cur = dst;
 122     unsigned char *dst_end = dst + dst_size;
 123     const unsigned char *src_end = src + src_size;
 124
 125     memcpy(huff_code_table, src, 15); src += 15;
 126
 127     while (src < src_end) {
 128         huff_code = *src++;
 129         if ((huff_code >> 4) == 15) {
 130             b = huff_code << 4;
 131             huff_code = *src++;
 132             *dst_cur++ = b | (huff_code >> 4);
 133         } else
 134             *dst_cur++ = huff_code_table[huff_code >> 4];
 135         if (dst_cur >= dst_end)
 136             break;
 137
 138         huff_code &= 15;
 139         if (huff_code == 15) {
 140             *dst_cur++ = *src++;
 141         } else
 142             *dst_cur++ = huff_code_table[huff_code];
 143         if (dst_cur >= dst_end)
 144             break;
 145     }
 146
 147     return dst_cur - dst;
 148 }
 149
 150 static int cin_decode_lzss(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
 151 {
 152     uint16_t cmd;
 153     int i, sz, offset, code;
 154     unsigned char *dst_end = dst + dst_size, *dst_start = dst;
 155     const unsigned char *src_end = src + src_size;
 156
 157     while (src < src_end && dst < dst_end) {
 158         code = *src++;
 159         for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) {
 160             if (code & (1 << i)) {
 161                 *dst++ = *src++;
 162             } else {
 163                 cmd = AV_RL16(src); src += 2;
 164                 offset = cmd >> 4;
 165                 if ((int) (dst - dst_start) < offset + 1)
 166                     return AVERROR_INVALIDDATA;
 167                 sz = (cmd & 0xF) + 2;
 168                 /* don't use memcpy/memmove here as the decoding routine (ab)uses */
 169                 /* buffer overlappings to repeat bytes in the destination */
 170                 sz = FFMIN(sz, dst_end - dst);
 171                 while (sz--) {
 172                     *dst = *(dst - offset - 1);
 173                     ++dst;
 174                 }
 175             }
 176         }
 177     }
 178
 179     return 0;
 180 }
 181
 182 static void cin_decode_rle(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
 183 {
 184     int len, code;
 185     unsigned char *dst_end = dst + dst_size;
 186     const unsigned char *src_end = src + src_size;
 187
 188     while (src < src_end && dst < dst_end) {
 189         code = *src++;
 190         if (code & 0x80) {
 191             len = code - 0x7F;
 192             memset(dst, *src++, FFMIN(len, dst_end - dst));
 193         } else {
 194             len = code + 1;
 195             memcpy(dst, src, FFMIN(len, dst_end - dst));
 196             src += len;
 197         }
 198         dst += len;
 199     }
 200 }
 201
 202 static int cinvideo_decode_frame(AVCodecContext *avctx,
 203                                  void *data, int *got_frame,
 204                                  AVPacket *avpkt)
 205 {
 206     const uint8_t *buf = avpkt->data;
 207     int buf_size = avpkt->size;
 208     CinVideoContext *cin = avctx->priv_data;
 209     int i, y, palette_type, palette_colors_count, bitmap_frame_type, bitmap_frame_size, res = 0;
 210
 211     palette_type = buf[0];
 212     palette_colors_count = AV_RL16(buf+1);
 213     bitmap_frame_type = buf[3];
 214     buf += 4;
 215
 216     bitmap_frame_size = buf_size - 4;
 217
 218     /* handle palette */
 219     if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0)))
 220         return AVERROR_INVALIDDATA;
 221     if (palette_type == 0) {
 222         if (palette_colors_count > 256)
 223             return AVERROR_INVALIDDATA;
 224         for (i = 0; i < palette_colors_count; ++i) {
 225             cin->palette[i] = bytestream_get_le24(&buf);
 226             bitmap_frame_size -= 3;
 227         }
 228     } else {
 229         for (i = 0; i < palette_colors_count; ++i) {
 230             cin->palette[buf[0]] = AV_RL24(buf+1);
 231             buf += 4;
 232             bitmap_frame_size -= 4;
 233         }
 234     }
 235
 236     /* note: the decoding routines below assumes that surface.width = surface.pitch */
 237     switch (bitmap_frame_type) {
 238     case 9:
 239         cin_decode_rle(buf, bitmap_frame_size,
 240           cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
 241         break;
 242     case 34:
 243         cin_decode_rle(buf, bitmap_frame_size,
 244           cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
 245         cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
 246           cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
 247         break;
 248     case 35:
 249         cin_decode_huffman(buf, bitmap_frame_size,
 250           cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
 251         cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
 252           cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
 253         break;
 254     case 36:
 255         bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
 256           cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
 257         cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
 258           cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
 259         cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
 260           cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
 261         break;
 262     case 37:
 263         cin_decode_huffman(buf, bitmap_frame_size,
 264           cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
 265         break;
 266     case 38:
 267         res = cin_decode_lzss(buf, bitmap_frame_size,
 268                               cin->bitmap_table[CIN_CUR_BMP],
 269                               cin->bitmap_size);
 270         if (res < 0)
 271             return res;
 272         break;
 273     case 39:
 274         res = cin_decode_lzss(buf, bitmap_frame_size,
 275                               cin->bitmap_table[CIN_CUR_BMP],
 276                               cin->bitmap_size);
 277         if (res < 0)
 278             return res;
 279         cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
 280           cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
 281         break;
 282     }
 283
 284     if ((res = ff_reget_buffer(avctx, &cin->frame)) < 0) {
 285         av_log(cin->avctx, AV_LOG_ERROR, "delphinecinvideo: reget_buffer() failed to allocate a frame\n");
 286         return res;
 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     if ((res = av_frame_ref(data, &cin->frame)) < 0)
 299         return res;
 300
 301     *got_frame = 1;
 302
 303     return buf_size;
 304 }
 305
 306 static av_cold int cinvideo_decode_end(AVCodecContext *avctx)
 307 {
 308     CinVideoContext *cin = avctx->priv_data;
 309     int i;
 310
 311     av_frame_unref(&cin->frame);
 312
 313     for (i = 0; i < 3; ++i)
 314         av_free(cin->bitmap_table[i]);
 315
 316     return 0;
 317 }
 318
 319 static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
 320 {
 321     CinAudioContext *cin = avctx->priv_data;
 322
 323     cin->initial_decode_frame = 1;
 324     cin->delta                = 0;
 325     avctx->sample_fmt         = AV_SAMPLE_FMT_S16;
 326     avctx->channels           = 1;
 327     avctx->channel_layout     = AV_CH_LAYOUT_MONO;
 328
 329     return 0;
 330 }
 331
 332 static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
 333                                  int *got_frame_ptr, AVPacket *avpkt)
 334 {
 335     AVFrame *frame     = data;
 336     const uint8_t *buf = avpkt->data;
 337     CinAudioContext *cin = avctx->priv_data;
 338     const uint8_t *buf_end = buf + avpkt->size;
 339     int16_t *samples;
 340     int delta, ret;
 341
 342     /* get output buffer */
 343     frame->nb_samples = avpkt->size - cin->initial_decode_frame;
 344     if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
 345         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
 346         return ret;
 347     }
 348     samples = (int16_t *)frame->data[0];
 349
 350     delta = cin->delta;
 351     if (cin->initial_decode_frame) {
 352         cin->initial_decode_frame = 0;
 353         delta = sign_extend(AV_RL16(buf), 16);
 354         buf += 2;
 355         *samples++ = delta;
 356     }
 357     while (buf < buf_end) {
 358         delta += cinaudio_delta16_table[*buf++];
 359         delta = av_clip_int16(delta);
 360         *samples++ = delta;
 361     }
 362     cin->delta = delta;
 363
 364     *got_frame_ptr = 1;
 365
 366     return avpkt->size;
 367 }
 368
 369
 370 AVCodec ff_dsicinvideo_decoder = {
 371     .name           = "dsicinvideo",
 372     .type           = AVMEDIA_TYPE_VIDEO,
 373     .id             = AV_CODEC_ID_DSICINVIDEO,
 374     .priv_data_size = sizeof(CinVideoContext),
 375     .init           = cinvideo_decode_init,
 376     .close          = cinvideo_decode_end,
 377     .decode         = cinvideo_decode_frame,
 378     .capabilities   = CODEC_CAP_DR1,
 379     .long_name      = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
 380 };
 381
 382 AVCodec ff_dsicinaudio_decoder = {
 383     .name           = "dsicinaudio",
 384     .type           = AVMEDIA_TYPE_AUDIO,
 385     .id             = AV_CODEC_ID_DSICINAUDIO,
 386     .priv_data_size = sizeof(CinAudioContext),
 387     .init           = cinaudio_decode_init,
 388     .decode         = cinaudio_decode_frame,
 389     .capabilities   = CODEC_CAP_DR1,
 390     .long_name      = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),
 391 };