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
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
90 static av_cold void destroy_buffers(CinVideoContext *cin)
94 for (i = 0; i < 3; ++i)
95 av_freep(&cin->bitmap_table[i]);
98 static av_cold int allocate_buffers(CinVideoContext *cin)
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(cin->avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n");
106 destroy_buffers(cin);
107 return AVERROR(ENOMEM);
114 static av_cold int cinvideo_decode_init(AVCodecContext *avctx)
116 CinVideoContext *cin = avctx->priv_data;
119 avctx->pix_fmt = AV_PIX_FMT_PAL8;
121 cin->frame = av_frame_alloc();
123 return AVERROR(ENOMEM);
125 cin->bitmap_size = avctx->width * avctx->height;
126 if (allocate_buffers(cin))
127 return AVERROR(ENOMEM);
132 static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst,
139 static int cin_decode_huffman(const unsigned char *src, int src_size,
140 unsigned char *dst, int dst_size)
142 int b, huff_code = 0;
143 unsigned char huff_code_table[15];
144 unsigned char *dst_cur = dst;
145 unsigned char *dst_end = dst + dst_size;
146 const unsigned char *src_end = src + src_size;
148 memcpy(huff_code_table, src, 15);
151 while (src < src_end) {
153 if ((huff_code >> 4) == 15) {
156 *dst_cur++ = b | (huff_code >> 4);
158 *dst_cur++ = huff_code_table[huff_code >> 4];
159 if (dst_cur >= dst_end)
163 if (huff_code == 15) {
166 *dst_cur++ = huff_code_table[huff_code];
167 if (dst_cur >= dst_end)
171 return dst_cur - dst;
174 static int cin_decode_lzss(const unsigned char *src, int src_size,
175 unsigned char *dst, int dst_size)
178 int i, sz, offset, code;
179 unsigned char *dst_end = dst + dst_size, *dst_start = dst;
180 const unsigned char *src_end = src + src_size;
182 while (src < src_end && dst < dst_end) {
184 for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) {
185 if (code & (1 << i)) {
191 if ((int)(dst - dst_start) < offset + 1)
192 return AVERROR_INVALIDDATA;
193 sz = (cmd & 0xF) + 2;
194 /* don't use memcpy/memmove here as the decoding routine
195 * (ab)uses buffer overlappings to repeat bytes in the
197 sz = FFMIN(sz, dst_end - dst);
199 *dst = *(dst - offset - 1);
209 static int cin_decode_rle(const unsigned char *src, int src_size,
210 unsigned char *dst, int dst_size)
213 unsigned char *dst_end = dst + dst_size;
214 const unsigned char *src_end = src + src_size;
216 while (src + 1 < src_end && dst < dst_end) {
220 memset(dst, *src++, FFMIN(len, dst_end - dst));
223 if (len > src_end-src) {
224 av_log(NULL, AV_LOG_ERROR, "RLE overread\n");
225 return AVERROR_INVALIDDATA;
227 memcpy(dst, src, FFMIN3(len, dst_end - dst, src_end - src));
235 static int cinvideo_decode_frame(AVCodecContext *avctx,
236 void *data, int *got_frame,
239 const uint8_t *buf = avpkt->data;
240 int buf_size = avpkt->size;
241 CinVideoContext *cin = avctx->priv_data;
242 int i, y, palette_type, palette_colors_count,
243 bitmap_frame_type, bitmap_frame_size, res = 0;
245 palette_type = buf[0];
246 palette_colors_count = AV_RL16(buf + 1);
247 bitmap_frame_type = buf[3];
250 bitmap_frame_size = buf_size - 4;
253 if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0)))
254 return AVERROR_INVALIDDATA;
255 if (palette_type == 0) {
256 if (palette_colors_count > 256)
257 return AVERROR_INVALIDDATA;
258 for (i = 0; i < palette_colors_count; ++i) {
259 cin->palette[i] = 0xFFU << 24 | bytestream_get_le24(&buf);
260 bitmap_frame_size -= 3;
263 for (i = 0; i < palette_colors_count; ++i) {
264 cin->palette[buf[0]] = 0xFFU << 24 | AV_RL24(buf + 1);
266 bitmap_frame_size -= 4;
270 /* note: the decoding routines below assumes that
271 * surface.width = surface.pitch */
272 switch (bitmap_frame_type) {
274 cin_decode_rle(buf, bitmap_frame_size,
275 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
278 cin_decode_rle(buf, bitmap_frame_size,
279 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
280 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
281 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
284 bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
285 cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
286 cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
287 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
290 bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
291 cin->bitmap_table[CIN_INT_BMP],
293 cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
294 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
295 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
296 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
299 cin_decode_huffman(buf, bitmap_frame_size,
300 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
303 res = cin_decode_lzss(buf, bitmap_frame_size,
304 cin->bitmap_table[CIN_CUR_BMP],
310 res = cin_decode_lzss(buf, bitmap_frame_size,
311 cin->bitmap_table[CIN_CUR_BMP],
315 cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
316 cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
320 if ((res = ff_reget_buffer(avctx, cin->frame)) < 0)
323 memcpy(cin->frame->data[1], cin->palette, sizeof(cin->palette));
324 cin->frame->palette_has_changed = 1;
325 for (y = 0; y < cin->avctx->height; ++y)
326 memcpy(cin->frame->data[0] + (cin->avctx->height - 1 - y) * cin->frame->linesize[0],
327 cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width,
330 FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP],
331 cin->bitmap_table[CIN_PRE_BMP]);
333 if ((res = av_frame_ref(data, cin->frame)) < 0)
341 static av_cold int cinvideo_decode_end(AVCodecContext *avctx)
343 CinVideoContext *cin = avctx->priv_data;
345 av_frame_free(&cin->frame);
347 destroy_buffers(cin);
352 static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
354 CinAudioContext *cin = avctx->priv_data;
356 cin->initial_decode_frame = 1;
358 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
360 avctx->channel_layout = AV_CH_LAYOUT_MONO;
365 static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
366 int *got_frame_ptr, AVPacket *avpkt)
368 AVFrame *frame = data;
369 const uint8_t *buf = avpkt->data;
370 CinAudioContext *cin = avctx->priv_data;
371 const uint8_t *buf_end = buf + avpkt->size;
375 /* get output buffer */
376 frame->nb_samples = avpkt->size - cin->initial_decode_frame;
377 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
379 samples = (int16_t *)frame->data[0];
382 if (cin->initial_decode_frame) {
383 cin->initial_decode_frame = 0;
384 delta = sign_extend(AV_RL16(buf), 16);
388 while (buf < buf_end) {
389 delta += cinaudio_delta16_table[*buf++];
390 delta = av_clip_int16(delta);
400 AVCodec ff_dsicinvideo_decoder = {
401 .name = "dsicinvideo",
402 .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
403 .type = AVMEDIA_TYPE_VIDEO,
404 .id = AV_CODEC_ID_DSICINVIDEO,
405 .priv_data_size = sizeof(CinVideoContext),
406 .init = cinvideo_decode_init,
407 .close = cinvideo_decode_end,
408 .decode = cinvideo_decode_frame,
409 .capabilities = CODEC_CAP_DR1,
412 AVCodec ff_dsicinaudio_decoder = {
413 .name = "dsicinaudio",
414 .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),
415 .type = AVMEDIA_TYPE_AUDIO,
416 .id = AV_CODEC_ID_DSICINAUDIO,
417 .priv_data_size = sizeof(CinAudioContext),
418 .init = cinaudio_decode_init,
419 .decode = cinaudio_decode_frame,
420 .capabilities = CODEC_CAP_DR1,