2 * Delphine Software International CIN Audio/Video Decoders
3 * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
5 * This file is part of FFmpeg.
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.
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.
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
24 * Delphine Software International CIN audio/video decoders
28 #include "bytestream.h"
31 typedef enum CinVideoBitmapIndex {
32 CIN_CUR_BMP = 0, /* current */
33 CIN_PRE_BMP = 1, /* previous */
34 CIN_INT_BMP = 2 /* intermediate */
35 } CinVideoBitmapIndex;
37 typedef struct CinVideoContext {
38 AVCodecContext *avctx;
40 unsigned int bitmap_size;
41 uint32_t palette[256];
42 uint8_t *bitmap_table[3];
45 typedef struct CinAudioContext {
46 AVCodecContext *avctx;
47 int initial_decode_frame;
52 /* table defining a geometric sequence with multiplier = 32767 ^ (1 / 128) */
53 static const int16_t cinaudio_delta16_table[256] = {
54 0, 0, 0, 0, 0, 0, 0, 0,
55 0, 0, 0, 0, 0, 0, 0, 0,
56 0, 0, 0, -30210, -27853, -25680, -23677, -21829,
57 -20126, -18556, -17108, -15774, -14543, -13408, -12362, -11398,
58 -10508, -9689, -8933, -8236, -7593, -7001, -6455, -5951,
59 -5487, -5059, -4664, -4300, -3964, -3655, -3370, -3107,
60 -2865, -2641, -2435, -2245, -2070, -1908, -1759, -1622,
61 -1495, -1379, -1271, -1172, -1080, -996, -918, -847,
62 -781, -720, -663, -612, -564, -520, -479, -442,
63 -407, -376, -346, -319, -294, -271, -250, -230,
64 -212, -196, -181, -166, -153, -141, -130, -120,
65 -111, -102, -94, -87, -80, -74, -68, -62,
66 -58, -53, -49, -45, -41, -38, -35, -32,
67 -30, -27, -25, -23, -21, -20, -18, -17,
68 -15, -14, -13, -12, -11, -10, -9, -8,
69 -7, -6, -5, -4, -3, -2, -1, 0,
70 0, 1, 2, 3, 4, 5, 6, 7,
71 8, 9, 10, 11, 12, 13, 14, 15,
72 17, 18, 20, 21, 23, 25, 27, 30,
73 32, 35, 38, 41, 45, 49, 53, 58,
74 62, 68, 74, 80, 87, 94, 102, 111,
75 120, 130, 141, 153, 166, 181, 196, 212,
76 230, 250, 271, 294, 319, 346, 376, 407,
77 442, 479, 520, 564, 612, 663, 720, 781,
78 847, 918, 996, 1080, 1172, 1271, 1379, 1495,
79 1622, 1759, 1908, 2070, 2245, 2435, 2641, 2865,
80 3107, 3370, 3655, 3964, 4300, 4664, 5059, 5487,
81 5951, 6455, 7001, 7593, 8236, 8933, 9689, 10508,
82 11398, 12362, 13408, 14543, 15774, 17108, 18556, 20126,
83 21829, 23677, 25680, 27853, 30210, 0, 0, 0,
84 0, 0, 0, 0, 0, 0, 0, 0,
85 0, 0, 0, 0, 0, 0, 0, 0
89 static av_cold int cinvideo_decode_init(AVCodecContext *avctx)
91 CinVideoContext *cin = avctx->priv_data;
95 avctx->pix_fmt = PIX_FMT_PAL8;
97 avcodec_get_frame_defaults(&cin->frame);
98 cin->frame.data[0] = NULL;
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");
110 static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst, int size)
116 static int cin_decode_huffman(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
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;
124 memcpy(huff_code_table, src, 15); src += 15; src_size -= 15;
126 while (src < src_end) {
128 if ((huff_code >> 4) == 15) {
131 *dst_cur++ = b | (huff_code >> 4);
133 *dst_cur++ = huff_code_table[huff_code >> 4];
134 if (dst_cur >= dst_end)
138 if (huff_code == 15) {
141 *dst_cur++ = huff_code_table[huff_code];
142 if (dst_cur >= dst_end)
146 return dst_cur - dst;
149 static void cin_decode_lzss(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
152 int i, sz, offset, code;
153 unsigned char *dst_end = dst + dst_size;
154 const unsigned char *src_end = src + src_size;
156 while (src < src_end && dst < dst_end) {
158 for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) {
159 if (code & (1 << i)) {
162 cmd = AV_RL16(src); src += 2;
164 sz = (cmd & 0xF) + 2;
165 /* don't use memcpy/memmove here as the decoding routine (ab)uses */
166 /* buffer overlappings to repeat bytes in the destination */
167 sz = FFMIN(sz, dst_end - dst);
169 *dst = *(dst - offset - 1);
177 static void cin_decode_rle(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
180 unsigned char *dst_end = dst + dst_size;
181 const unsigned char *src_end = src + src_size;
183 while (src < src_end && dst < dst_end) {
187 memset(dst, *src++, FFMIN(len, dst_end - dst));
190 memcpy(dst, src, FFMIN(len, dst_end - dst));
197 static int cinvideo_decode_frame(AVCodecContext *avctx,
198 void *data, int *data_size,
201 const uint8_t *buf = avpkt->data;
202 int buf_size = avpkt->size;
203 CinVideoContext *cin = avctx->priv_data;
204 int i, y, palette_type, palette_colors_count, bitmap_frame_type, bitmap_frame_size;
206 cin->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
207 if (avctx->reget_buffer(avctx, &cin->frame)) {
208 av_log(cin->avctx, AV_LOG_ERROR, "delphinecinvideo: reget_buffer() failed to allocate a frame\n");
212 palette_type = buf[0];
213 palette_colors_count = AV_RL16(buf+1);
214 bitmap_frame_type = buf[3];
217 bitmap_frame_size = buf_size - 4;
220 if (palette_type == 0) {
221 for (i = 0; i < palette_colors_count; ++i) {
222 cin->palette[i] = bytestream_get_le24(&buf);
223 bitmap_frame_size -= 3;
226 for (i = 0; i < palette_colors_count; ++i) {
227 cin->palette[buf[0]] = AV_RL24(buf+1);
229 bitmap_frame_size -= 4;
232 memcpy(cin->frame.data[1], cin->palette, sizeof(cin->palette));
233 cin->frame.palette_has_changed = 1;
235 /* note: the decoding routines below assumes that surface.width = surface.pitch */
236 switch (bitmap_frame_type) {
238 cin_decode_rle(buf, bitmap_frame_size,
239 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
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);
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);
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);
262 cin_decode_huffman(buf, bitmap_frame_size,
263 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
266 cin_decode_lzss(buf, bitmap_frame_size,
267 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
270 cin_decode_lzss(buf, bitmap_frame_size,
271 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
272 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
273 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
277 for (y = 0; y < cin->avctx->height; ++y)
278 memcpy(cin->frame.data[0] + (cin->avctx->height - 1 - y) * cin->frame.linesize[0],
279 cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width,
282 FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_table[CIN_PRE_BMP]);
284 *data_size = sizeof(AVFrame);
285 *(AVFrame *)data = cin->frame;
290 static av_cold int cinvideo_decode_end(AVCodecContext *avctx)
292 CinVideoContext *cin = avctx->priv_data;
295 if (cin->frame.data[0])
296 avctx->release_buffer(avctx, &cin->frame);
298 for (i = 0; i < 3; ++i)
299 av_free(cin->bitmap_table[i]);
304 static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
306 CinAudioContext *cin = avctx->priv_data;
309 cin->initial_decode_frame = 1;
311 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
316 static int cinaudio_decode_frame(AVCodecContext *avctx,
317 void *data, int *data_size,
320 const uint8_t *buf = avpkt->data;
321 int buf_size = avpkt->size;
322 CinAudioContext *cin = avctx->priv_data;
323 const uint8_t *src = buf;
324 int16_t *samples = (int16_t *)data;
326 buf_size = FFMIN(buf_size, *data_size/2);
328 if (cin->initial_decode_frame) {
329 cin->initial_decode_frame = 0;
330 cin->delta = (int16_t)AV_RL16(src); src += 2;
331 *samples++ = cin->delta;
334 while (buf_size > 0) {
335 cin->delta += cinaudio_delta16_table[*src++];
336 cin->delta = av_clip_int16(cin->delta);
337 *samples++ = cin->delta;
341 *data_size = (uint8_t *)samples - (uint8_t *)data;
347 AVCodec ff_dsicinvideo_decoder = {
348 .name = "dsicinvideo",
349 .type = AVMEDIA_TYPE_VIDEO,
350 .id = CODEC_ID_DSICINVIDEO,
351 .priv_data_size = sizeof(CinVideoContext),
352 .init = cinvideo_decode_init,
353 .close = cinvideo_decode_end,
354 .decode = cinvideo_decode_frame,
355 .capabilities = CODEC_CAP_DR1,
356 .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
359 AVCodec ff_dsicinaudio_decoder = {
360 .name = "dsicinaudio",
361 .type = AVMEDIA_TYPE_AUDIO,
362 .id = CODEC_ID_DSICINAUDIO,
363 .priv_data_size = sizeof(CinAudioContext),
364 .init = cinaudio_decode_init,
365 .decode = cinaudio_decode_frame,
366 .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),