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"
32 typedef enum CinVideoBitmapIndex {
33 CIN_CUR_BMP = 0, /* current */
34 CIN_PRE_BMP = 1, /* previous */
35 CIN_INT_BMP = 2 /* intermediate */
36 } CinVideoBitmapIndex;
38 typedef struct CinVideoContext {
39 AVCodecContext *avctx;
41 unsigned int bitmap_size;
42 uint32_t palette[256];
43 uint8_t *bitmap_table[3];
46 typedef struct CinAudioContext {
48 int initial_decode_frame;
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
89 static av_cold void destroy_buffers(CinVideoContext *cin)
93 for (i = 0; i < 3; ++i)
94 av_freep(&cin->bitmap_table[i]);
97 static av_cold int allocate_buffers(CinVideoContext *cin)
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(cin->avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n");
105 destroy_buffers(cin);
106 return AVERROR(ENOMEM);
113 static av_cold int cinvideo_decode_init(AVCodecContext *avctx)
115 CinVideoContext *cin = avctx->priv_data;
118 avctx->pix_fmt = AV_PIX_FMT_PAL8;
120 avcodec_get_frame_defaults(&cin->frame);
122 cin->bitmap_size = avctx->width * avctx->height;
123 if (allocate_buffers(cin))
124 return AVERROR(ENOMEM);
129 static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst, int size)
135 static int cin_decode_huffman(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
137 int b, huff_code = 0;
138 unsigned char huff_code_table[15];
139 unsigned char *dst_cur = dst;
140 unsigned char *dst_end = dst + dst_size;
141 const unsigned char *src_end = src + src_size;
143 memcpy(huff_code_table, src, 15); src += 15;
145 while (src < src_end) {
147 if ((huff_code >> 4) == 15) {
150 *dst_cur++ = b | (huff_code >> 4);
152 *dst_cur++ = huff_code_table[huff_code >> 4];
153 if (dst_cur >= dst_end)
157 if (huff_code == 15) {
160 *dst_cur++ = huff_code_table[huff_code];
161 if (dst_cur >= dst_end)
165 return dst_cur - dst;
168 static int cin_decode_lzss(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
171 int i, sz, offset, code;
172 unsigned char *dst_end = dst + dst_size, *dst_start = dst;
173 const unsigned char *src_end = src + src_size;
175 while (src < src_end && dst < dst_end) {
177 for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) {
178 if (code & (1 << i)) {
181 cmd = AV_RL16(src); src += 2;
183 if ((int) (dst - dst_start) < offset + 1)
184 return AVERROR_INVALIDDATA;
185 sz = (cmd & 0xF) + 2;
186 /* don't use memcpy/memmove here as the decoding routine (ab)uses */
187 /* buffer overlappings to repeat bytes in the destination */
188 sz = FFMIN(sz, dst_end - dst);
190 *dst = *(dst - offset - 1);
200 static int cin_decode_rle(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
203 unsigned char *dst_end = dst + dst_size;
204 const unsigned char *src_end = src + src_size;
206 while (src + 1 < src_end && dst < dst_end) {
210 memset(dst, *src++, FFMIN(len, dst_end - dst));
213 if (len > src_end-src) {
214 av_log(0, AV_LOG_ERROR, "RLE overread\n");
215 return AVERROR_INVALIDDATA;
217 memcpy(dst, src, FFMIN(len, dst_end - dst));
225 static int cinvideo_decode_frame(AVCodecContext *avctx,
226 void *data, int *data_size,
229 const uint8_t *buf = avpkt->data;
230 int buf_size = avpkt->size;
231 CinVideoContext *cin = avctx->priv_data;
232 int i, y, palette_type, palette_colors_count, bitmap_frame_type, bitmap_frame_size, res = 0;
234 palette_type = buf[0];
235 palette_colors_count = AV_RL16(buf+1);
236 bitmap_frame_type = buf[3];
239 bitmap_frame_size = buf_size - 4;
242 if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0)))
243 return AVERROR_INVALIDDATA;
244 if (palette_type == 0) {
245 if (palette_colors_count > 256)
246 return AVERROR_INVALIDDATA;
247 for (i = 0; i < palette_colors_count; ++i) {
248 cin->palette[i] = 0xFFU << 24 | bytestream_get_le24(&buf);
249 bitmap_frame_size -= 3;
252 for (i = 0; i < palette_colors_count; ++i) {
253 cin->palette[buf[0]] = 0xFFU << 24 | AV_RL24(buf+1);
255 bitmap_frame_size -= 4;
259 /* note: the decoding routines below assumes that surface.width = surface.pitch */
260 switch (bitmap_frame_type) {
262 cin_decode_rle(buf, bitmap_frame_size,
263 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
266 cin_decode_rle(buf, bitmap_frame_size,
267 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
268 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
269 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
272 cin_decode_huffman(buf, bitmap_frame_size,
273 cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
274 cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
275 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
278 bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
279 cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
280 cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
281 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
282 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
283 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
286 cin_decode_huffman(buf, bitmap_frame_size,
287 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
290 res = cin_decode_lzss(buf, bitmap_frame_size,
291 cin->bitmap_table[CIN_CUR_BMP],
297 res = cin_decode_lzss(buf, bitmap_frame_size,
298 cin->bitmap_table[CIN_CUR_BMP],
302 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
303 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
307 cin->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
308 if ((res = avctx->reget_buffer(avctx, &cin->frame))) {
309 av_log(cin->avctx, AV_LOG_ERROR, "failed to allocate a frame\n");
313 memcpy(cin->frame.data[1], cin->palette, sizeof(cin->palette));
314 cin->frame.palette_has_changed = 1;
315 for (y = 0; y < cin->avctx->height; ++y)
316 memcpy(cin->frame.data[0] + (cin->avctx->height - 1 - y) * cin->frame.linesize[0],
317 cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width,
320 FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_table[CIN_PRE_BMP]);
322 *data_size = sizeof(AVFrame);
323 *(AVFrame *)data = cin->frame;
328 static av_cold int cinvideo_decode_end(AVCodecContext *avctx)
330 CinVideoContext *cin = avctx->priv_data;
332 if (cin->frame.data[0])
333 avctx->release_buffer(avctx, &cin->frame);
335 destroy_buffers(cin);
340 static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
342 CinAudioContext *cin = avctx->priv_data;
344 if (avctx->channels != 1) {
345 av_log_ask_for_sample(avctx, "Number of channels is not supported\n");
346 return AVERROR_PATCHWELCOME;
349 cin->initial_decode_frame = 1;
351 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
353 avcodec_get_frame_defaults(&cin->frame);
354 avctx->coded_frame = &cin->frame;
359 static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
360 int *got_frame_ptr, AVPacket *avpkt)
362 const uint8_t *buf = avpkt->data;
363 CinAudioContext *cin = avctx->priv_data;
364 const uint8_t *buf_end = buf + avpkt->size;
368 /* get output buffer */
369 cin->frame.nb_samples = avpkt->size - cin->initial_decode_frame;
370 if ((ret = avctx->get_buffer(avctx, &cin->frame)) < 0) {
371 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
374 samples = (int16_t *)cin->frame.data[0];
377 if (cin->initial_decode_frame) {
378 cin->initial_decode_frame = 0;
379 delta = sign_extend(AV_RL16(buf), 16);
383 while (buf < buf_end) {
384 delta += cinaudio_delta16_table[*buf++];
385 delta = av_clip_int16(delta);
391 *(AVFrame *)data = cin->frame;
397 AVCodec ff_dsicinvideo_decoder = {
398 .name = "dsicinvideo",
399 .type = AVMEDIA_TYPE_VIDEO,
400 .id = AV_CODEC_ID_DSICINVIDEO,
401 .priv_data_size = sizeof(CinVideoContext),
402 .init = cinvideo_decode_init,
403 .close = cinvideo_decode_end,
404 .decode = cinvideo_decode_frame,
405 .capabilities = CODEC_CAP_DR1,
406 .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
409 AVCodec ff_dsicinaudio_decoder = {
410 .name = "dsicinaudio",
411 .type = AVMEDIA_TYPE_AUDIO,
412 .id = AV_CODEC_ID_DSICINAUDIO,
413 .priv_data_size = sizeof(CinAudioContext),
414 .init = cinaudio_decode_init,
415 .decode = cinaudio_decode_frame,
416 .capabilities = CODEC_CAP_DR1,
417 .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),