2 * Delphine Software International CIN Audio/Video Decoders
3 * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
5 * This file is part of Libav.
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.
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.
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
24 * Delphine Software International CIN audio/video decoders
27 #include "libavutil/channel_layout.h"
29 #include "bytestream.h"
34 typedef enum CinVideoBitmapIndex {
35 CIN_CUR_BMP = 0, /* current */
36 CIN_PRE_BMP = 1, /* previous */
37 CIN_INT_BMP = 2 /* intermediate */
38 } CinVideoBitmapIndex;
40 typedef struct CinVideoContext {
41 AVCodecContext *avctx;
43 unsigned int bitmap_size;
44 uint32_t palette[256];
45 uint8_t *bitmap_table[3];
48 typedef struct CinAudioContext {
49 int initial_decode_frame;
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
91 static av_cold int cinvideo_decode_init(AVCodecContext *avctx)
93 CinVideoContext *cin = avctx->priv_data;
97 avctx->pix_fmt = AV_PIX_FMT_PAL8;
99 cin->frame = av_frame_alloc();
101 return AVERROR(ENOMEM);
103 cin->bitmap_size = avctx->width * avctx->height;
104 for (i = 0; i < 3; ++i) {
105 cin->bitmap_table[i] = av_mallocz(cin->bitmap_size);
106 if (!cin->bitmap_table[i])
107 av_log(avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n");
113 static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst,
120 static int cin_decode_huffman(const unsigned char *src, int src_size,
121 unsigned char *dst, int dst_size)
123 int b, huff_code = 0;
124 unsigned char huff_code_table[15];
125 unsigned char *dst_cur = dst;
126 unsigned char *dst_end = dst + dst_size;
127 const unsigned char *src_end = src + src_size;
129 memcpy(huff_code_table, src, 15);
132 while (src < src_end) {
134 if ((huff_code >> 4) == 15) {
137 *dst_cur++ = b | (huff_code >> 4);
139 *dst_cur++ = huff_code_table[huff_code >> 4];
140 if (dst_cur >= dst_end)
144 if (huff_code == 15) {
147 *dst_cur++ = huff_code_table[huff_code];
148 if (dst_cur >= dst_end)
152 return dst_cur - dst;
155 static int cin_decode_lzss(const unsigned char *src, int src_size,
156 unsigned char *dst, int dst_size)
159 int i, sz, offset, code;
160 unsigned char *dst_end = dst + dst_size, *dst_start = dst;
161 const unsigned char *src_end = src + src_size;
163 while (src < src_end && dst < dst_end) {
165 for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) {
166 if (code & (1 << i)) {
172 if ((int)(dst - dst_start) < offset + 1)
173 return AVERROR_INVALIDDATA;
174 sz = (cmd & 0xF) + 2;
175 /* don't use memcpy/memmove here as the decoding routine
176 * (ab)uses buffer overlappings to repeat bytes in the
178 sz = FFMIN(sz, dst_end - dst);
180 *dst = *(dst - offset - 1);
190 static void cin_decode_rle(const unsigned char *src, int src_size,
191 unsigned char *dst, int dst_size)
194 unsigned char *dst_end = dst + dst_size;
195 const unsigned char *src_end = src + src_size;
197 while (src < src_end && dst < dst_end) {
203 memset(dst, *src++, FFMIN(len, dst_end - dst));
206 memcpy(dst, src, FFMIN3(len, dst_end - dst, src_end - src));
213 static int cinvideo_decode_frame(AVCodecContext *avctx,
214 void *data, int *got_frame,
217 const uint8_t *buf = avpkt->data;
218 int buf_size = avpkt->size;
219 CinVideoContext *cin = avctx->priv_data;
220 int i, y, palette_type, palette_colors_count,
221 bitmap_frame_type, bitmap_frame_size, res = 0;
223 palette_type = buf[0];
224 palette_colors_count = AV_RL16(buf + 1);
225 bitmap_frame_type = buf[3];
228 bitmap_frame_size = buf_size - 4;
231 if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0)))
232 return AVERROR_INVALIDDATA;
233 if (palette_type == 0) {
234 if (palette_colors_count > 256)
235 return AVERROR_INVALIDDATA;
236 for (i = 0; i < palette_colors_count; ++i) {
237 cin->palette[i] = bytestream_get_le24(&buf);
238 bitmap_frame_size -= 3;
241 for (i = 0; i < palette_colors_count; ++i) {
242 cin->palette[buf[0]] = AV_RL24(buf + 1);
244 bitmap_frame_size -= 4;
248 bitmap_frame_size = FFMIN(cin->bitmap_size, bitmap_frame_size);
250 /* note: the decoding routines below assumes that
251 * surface.width = surface.pitch */
252 switch (bitmap_frame_type) {
254 cin_decode_rle(buf, bitmap_frame_size,
255 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
258 cin_decode_rle(buf, bitmap_frame_size,
259 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
260 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
261 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
264 cin_decode_huffman(buf, bitmap_frame_size,
265 cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
266 cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
267 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
270 bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
271 cin->bitmap_table[CIN_INT_BMP],
273 cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
274 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
275 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
276 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
279 cin_decode_huffman(buf, bitmap_frame_size,
280 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
283 res = cin_decode_lzss(buf, bitmap_frame_size,
284 cin->bitmap_table[CIN_CUR_BMP],
290 res = cin_decode_lzss(buf, bitmap_frame_size,
291 cin->bitmap_table[CIN_CUR_BMP],
295 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
296 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
300 if ((res = ff_reget_buffer(avctx, cin->frame)) < 0) {
301 av_log(cin->avctx, AV_LOG_ERROR,
302 "delphinecinvideo: reget_buffer() failed to allocate a frame\n");
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,
313 FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP],
314 cin->bitmap_table[CIN_PRE_BMP]);
316 if ((res = av_frame_ref(data, cin->frame)) < 0)
324 static av_cold int cinvideo_decode_end(AVCodecContext *avctx)
326 CinVideoContext *cin = avctx->priv_data;
329 av_frame_free(&cin->frame);
331 for (i = 0; i < 3; ++i)
332 av_free(cin->bitmap_table[i]);
337 static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
339 CinAudioContext *cin = avctx->priv_data;
341 cin->initial_decode_frame = 1;
343 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
345 avctx->channel_layout = AV_CH_LAYOUT_MONO;
350 static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
351 int *got_frame_ptr, AVPacket *avpkt)
353 AVFrame *frame = data;
354 const uint8_t *buf = avpkt->data;
355 CinAudioContext *cin = avctx->priv_data;
356 const uint8_t *buf_end = buf + avpkt->size;
360 /* get output buffer */
361 frame->nb_samples = avpkt->size - cin->initial_decode_frame;
362 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
363 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
366 samples = (int16_t *)frame->data[0];
369 if (cin->initial_decode_frame) {
370 cin->initial_decode_frame = 0;
371 delta = sign_extend(AV_RL16(buf), 16);
375 while (buf < buf_end) {
376 delta += cinaudio_delta16_table[*buf++];
377 delta = av_clip_int16(delta);
387 AVCodec ff_dsicinvideo_decoder = {
388 .name = "dsicinvideo",
389 .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
390 .type = AVMEDIA_TYPE_VIDEO,
391 .id = AV_CODEC_ID_DSICINVIDEO,
392 .priv_data_size = sizeof(CinVideoContext),
393 .init = cinvideo_decode_init,
394 .close = cinvideo_decode_end,
395 .decode = cinvideo_decode_frame,
396 .capabilities = CODEC_CAP_DR1,
399 AVCodec ff_dsicinaudio_decoder = {
400 .name = "dsicinaudio",
401 .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),
402 .type = AVMEDIA_TYPE_AUDIO,
403 .id = AV_CODEC_ID_DSICINAUDIO,
404 .priv_data_size = sizeof(CinAudioContext),
405 .init = cinaudio_decode_init,
406 .decode = cinaudio_decode_frame,
407 .capabilities = CODEC_CAP_DR1,