Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * Apple Intermediate Codec decoder | |
3 | * | |
4 | * Copyright (c) 2013 Konstantin Shishkov | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include <inttypes.h> | |
24 | ||
25 | #include "avcodec.h" | |
26 | #include "bytestream.h" | |
27 | #include "internal.h" | |
28 | #include "get_bits.h" | |
29 | #include "golomb.h" | |
30 | #include "idctdsp.h" | |
31 | #include "unary.h" | |
32 | ||
33 | #define AIC_HDR_SIZE 24 | |
34 | #define AIC_BAND_COEFFS (64 + 32 + 192 + 96) | |
35 | ||
36 | enum AICBands { | |
37 | COEFF_LUMA = 0, | |
38 | COEFF_CHROMA, | |
39 | COEFF_LUMA_EXT, | |
40 | COEFF_CHROMA_EXT, | |
41 | NUM_BANDS | |
42 | }; | |
43 | ||
44 | static const int aic_num_band_coeffs[NUM_BANDS] = { 64, 32, 192, 96 }; | |
45 | ||
46 | static const int aic_band_off[NUM_BANDS] = { 0, 64, 96, 288 }; | |
47 | ||
48 | static const uint8_t aic_quant_matrix[64] = { | |
49 | 8, 16, 19, 22, 22, 26, 26, 27, | |
50 | 16, 16, 22, 22, 26, 27, 27, 29, | |
51 | 19, 22, 26, 26, 27, 29, 29, 35, | |
52 | 22, 24, 27, 27, 29, 32, 34, 38, | |
53 | 26, 27, 29, 29, 32, 35, 38, 46, | |
54 | 27, 29, 34, 34, 35, 40, 46, 56, | |
55 | 29, 34, 34, 37, 40, 48, 56, 69, | |
56 | 34, 37, 38, 40, 48, 58, 69, 83, | |
57 | }; | |
58 | ||
59 | static const uint8_t aic_y_scan[64] = { | |
60 | 0, 4, 1, 2, 5, 8, 12, 9, | |
61 | 6, 3, 7, 10, 13, 14, 11, 15, | |
62 | 47, 43, 46, 45, 42, 39, 35, 38, | |
63 | 41, 44, 40, 37, 34, 33, 36, 32, | |
64 | 16, 20, 17, 18, 21, 24, 28, 25, | |
65 | 22, 19, 23, 26, 29, 30, 27, 31, | |
66 | 63, 59, 62, 61, 58, 55, 51, 54, | |
67 | 57, 60, 56, 53, 50, 49, 52, 48, | |
68 | }; | |
69 | ||
70 | static const uint8_t aic_y_ext_scan[192] = { | |
71 | 64, 72, 65, 66, 73, 80, 88, 81, | |
72 | 74, 67, 75, 82, 89, 90, 83, 91, | |
73 | 0, 4, 1, 2, 5, 8, 12, 9, | |
74 | 6, 3, 7, 10, 13, 14, 11, 15, | |
75 | 16, 20, 17, 18, 21, 24, 28, 25, | |
76 | 22, 19, 23, 26, 29, 30, 27, 31, | |
77 | 155, 147, 154, 153, 146, 139, 131, 138, | |
78 | 145, 152, 144, 137, 130, 129, 136, 128, | |
79 | 47, 43, 46, 45, 42, 39, 35, 38, | |
80 | 41, 44, 40, 37, 34, 33, 36, 32, | |
81 | 63, 59, 62, 61, 58, 55, 51, 54, | |
82 | 57, 60, 56, 53, 50, 49, 52, 48, | |
83 | 96, 104, 97, 98, 105, 112, 120, 113, | |
84 | 106, 99, 107, 114, 121, 122, 115, 123, | |
85 | 68, 76, 69, 70, 77, 84, 92, 85, | |
86 | 78, 71, 79, 86, 93, 94, 87, 95, | |
87 | 100, 108, 101, 102, 109, 116, 124, 117, | |
88 | 110, 103, 111, 118, 125, 126, 119, 127, | |
89 | 187, 179, 186, 185, 178, 171, 163, 170, | |
90 | 177, 184, 176, 169, 162, 161, 168, 160, | |
91 | 159, 151, 158, 157, 150, 143, 135, 142, | |
92 | 149, 156, 148, 141, 134, 133, 140, 132, | |
93 | 191, 183, 190, 189, 182, 175, 167, 174, | |
94 | 181, 188, 180, 173, 166, 165, 172, 164, | |
95 | }; | |
96 | ||
97 | static const uint8_t aic_c_scan[64] = { | |
98 | 0, 4, 1, 2, 5, 8, 12, 9, | |
99 | 6, 3, 7, 10, 13, 14, 11, 15, | |
100 | 31, 27, 30, 29, 26, 23, 19, 22, | |
101 | 25, 28, 24, 21, 18, 17, 20, 16, | |
102 | 32, 36, 33, 34, 37, 40, 44, 41, | |
103 | 38, 35, 39, 42, 45, 46, 43, 47, | |
104 | 63, 59, 62, 61, 58, 55, 51, 54, | |
105 | 57, 60, 56, 53, 50, 49, 52, 48, | |
106 | }; | |
107 | ||
108 | static const uint8_t aic_c_ext_scan[192] = { | |
109 | 16, 24, 17, 18, 25, 32, 40, 33, | |
110 | 26, 19, 27, 34, 41, 42, 35, 43, | |
111 | 0, 4, 1, 2, 5, 8, 12, 9, | |
112 | 6, 3, 7, 10, 13, 14, 11, 15, | |
113 | 20, 28, 21, 22, 29, 36, 44, 37, | |
114 | 30, 23, 31, 38, 45, 46, 39, 47, | |
115 | 95, 87, 94, 93, 86, 79, 71, 78, | |
116 | 85, 92, 84, 77, 70, 69, 76, 68, | |
117 | 63, 59, 62, 61, 58, 55, 51, 54, | |
118 | 57, 60, 56, 53, 50, 49, 52, 48, | |
119 | 91, 83, 90, 89, 82, 75, 67, 74, | |
120 | 81, 88, 80, 73, 66, 65, 72, 64, | |
121 | 112, 120, 113, 114, 121, 128, 136, 129, | |
122 | 122, 115, 123, 130, 137, 138, 131, 139, | |
123 | 96, 100, 97, 98, 101, 104, 108, 105, | |
124 | 102, 99, 103, 106, 109, 110, 107, 111, | |
125 | 116, 124, 117, 118, 125, 132, 140, 133, | |
126 | 126, 119, 127, 134, 141, 142, 135, 143, | |
127 | 191, 183, 190, 189, 182, 175, 167, 174, | |
128 | 181, 188, 180, 173, 166, 165, 172, 164, | |
129 | 159, 155, 158, 157, 154, 151, 147, 150, | |
130 | 153, 156, 152, 149, 146, 145, 148, 144, | |
131 | 187, 179, 186, 185, 178, 171, 163, 170, | |
132 | 177, 184, 176, 169, 162, 161, 168, 160, | |
133 | }; | |
134 | ||
135 | static const uint8_t * const aic_scan[NUM_BANDS] = { | |
136 | aic_y_scan, aic_c_scan, aic_y_ext_scan, aic_c_ext_scan | |
137 | }; | |
138 | ||
139 | typedef struct AICContext { | |
140 | AVCodecContext *avctx; | |
141 | AVFrame *frame; | |
142 | IDCTDSPContext idsp; | |
143 | ScanTable scantable; | |
144 | ||
145 | int num_x_slices; | |
146 | int slice_width; | |
147 | int mb_width, mb_height; | |
148 | int quant; | |
149 | int interlaced; | |
150 | ||
151 | int16_t *slice_data; | |
152 | int16_t *data_ptr[NUM_BANDS]; | |
153 | ||
154 | DECLARE_ALIGNED(16, int16_t, block)[64]; | |
155 | DECLARE_ALIGNED(16, uint8_t, quant_matrix)[64]; | |
156 | } AICContext; | |
157 | ||
158 | static int aic_decode_header(AICContext *ctx, const uint8_t *src, int size) | |
159 | { | |
160 | uint32_t frame_size; | |
161 | int width, height; | |
162 | ||
163 | if (src[0] != 1) { | |
164 | av_log(ctx->avctx, AV_LOG_ERROR, "Invalid version %d\n", src[0]); | |
165 | return AVERROR_INVALIDDATA; | |
166 | } | |
167 | if (src[1] != AIC_HDR_SIZE - 2) { | |
168 | av_log(ctx->avctx, AV_LOG_ERROR, "Invalid header size %d\n", src[1]); | |
169 | return AVERROR_INVALIDDATA; | |
170 | } | |
171 | frame_size = AV_RB32(src + 2); | |
172 | width = AV_RB16(src + 6); | |
173 | height = AV_RB16(src + 8); | |
174 | if (frame_size > size) { | |
175 | av_log(ctx->avctx, AV_LOG_ERROR, "Frame size should be %"PRIu32" got %d\n", | |
176 | frame_size, size); | |
177 | return AVERROR_INVALIDDATA; | |
178 | } | |
179 | if (width != ctx->avctx->width || height != ctx->avctx->height) { | |
180 | av_log(ctx->avctx, AV_LOG_ERROR, | |
181 | "Picture dimension changed: old: %d x %d, new: %d x %d\n", | |
182 | ctx->avctx->width, ctx->avctx->height, width, height); | |
183 | return AVERROR_INVALIDDATA; | |
184 | } | |
185 | ctx->quant = src[15]; | |
186 | ctx->interlaced = ((src[16] >> 4) == 3); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
191 | #define GET_CODE(val, type, add_bits) \ | |
192 | do { \ | |
193 | if (type) \ | |
194 | val = get_ue_golomb(gb); \ | |
195 | else \ | |
196 | val = get_unary(gb, 1, 31); \ | |
197 | if (add_bits) \ | |
198 | val = (val << add_bits) + get_bits(gb, add_bits); \ | |
199 | } while (0) | |
200 | ||
201 | static int aic_decode_coeffs(GetBitContext *gb, int16_t *dst, | |
202 | int band, int slice_width, int force_chroma) | |
203 | { | |
204 | int has_skips, coeff_type, coeff_bits, skip_type, skip_bits; | |
205 | const int num_coeffs = aic_num_band_coeffs[band]; | |
206 | const uint8_t *scan = aic_scan[band | force_chroma]; | |
207 | int mb, idx; | |
208 | unsigned val; | |
209 | ||
210 | has_skips = get_bits1(gb); | |
211 | coeff_type = get_bits1(gb); | |
212 | coeff_bits = get_bits(gb, 3); | |
213 | ||
214 | if (has_skips) { | |
215 | skip_type = get_bits1(gb); | |
216 | skip_bits = get_bits(gb, 3); | |
217 | ||
218 | for (mb = 0; mb < slice_width; mb++) { | |
219 | idx = -1; | |
220 | do { | |
221 | GET_CODE(val, skip_type, skip_bits); | |
222 | if (val >= 0x10000) | |
223 | return AVERROR_INVALIDDATA; | |
224 | idx += val + 1; | |
225 | if (idx >= num_coeffs) | |
226 | break; | |
227 | GET_CODE(val, coeff_type, coeff_bits); | |
228 | val++; | |
229 | if (val >= 0x10000) | |
230 | return AVERROR_INVALIDDATA; | |
231 | dst[scan[idx]] = val; | |
232 | } while (idx < num_coeffs - 1); | |
233 | dst += num_coeffs; | |
234 | } | |
235 | } else { | |
236 | for (mb = 0; mb < slice_width; mb++) { | |
237 | for (idx = 0; idx < num_coeffs; idx++) { | |
238 | GET_CODE(val, coeff_type, coeff_bits); | |
239 | if (val >= 0x10000) | |
240 | return AVERROR_INVALIDDATA; | |
241 | dst[scan[idx]] = val; | |
242 | } | |
243 | dst += num_coeffs; | |
244 | } | |
245 | } | |
246 | return 0; | |
247 | } | |
248 | ||
249 | static void recombine_block(int16_t *dst, const uint8_t *scan, | |
250 | int16_t **base, int16_t **ext) | |
251 | { | |
252 | int i, j; | |
253 | ||
254 | for (i = 0; i < 4; i++) { | |
255 | for (j = 0; j < 4; j++) | |
256 | dst[scan[i * 8 + j]] = (*base)[j]; | |
257 | for (j = 0; j < 4; j++) | |
258 | dst[scan[i * 8 + j + 4]] = (*ext)[j]; | |
259 | *base += 4; | |
260 | *ext += 4; | |
261 | } | |
262 | for (; i < 8; i++) { | |
263 | for (j = 0; j < 8; j++) | |
264 | dst[scan[i * 8 + j]] = (*ext)[j]; | |
265 | *ext += 8; | |
266 | } | |
267 | } | |
268 | ||
269 | static void recombine_block_il(int16_t *dst, const uint8_t *scan, | |
270 | int16_t **base, int16_t **ext, | |
271 | int block_no) | |
272 | { | |
273 | int i, j; | |
274 | ||
275 | if (block_no < 2) { | |
276 | for (i = 0; i < 8; i++) { | |
277 | for (j = 0; j < 4; j++) | |
278 | dst[scan[i * 8 + j]] = (*base)[j]; | |
279 | for (j = 0; j < 4; j++) | |
280 | dst[scan[i * 8 + j + 4]] = (*ext)[j]; | |
281 | *base += 4; | |
282 | *ext += 4; | |
283 | } | |
284 | } else { | |
285 | for (i = 0; i < 64; i++) | |
286 | dst[scan[i]] = (*ext)[i]; | |
287 | *ext += 64; | |
288 | } | |
289 | } | |
290 | ||
291 | static void unquant_block(int16_t *block, int q, uint8_t *quant_matrix) | |
292 | { | |
293 | int i; | |
294 | ||
295 | for (i = 0; i < 64; i++) { | |
296 | int val = (uint16_t)block[i]; | |
297 | int sign = val & 1; | |
298 | ||
299 | block[i] = (((val >> 1) ^ -sign) * q * quant_matrix[i] >> 4) | |
300 | + sign; | |
301 | } | |
302 | } | |
303 | ||
304 | static int aic_decode_slice(AICContext *ctx, int mb_x, int mb_y, | |
305 | const uint8_t *src, int src_size) | |
306 | { | |
307 | GetBitContext gb; | |
308 | int ret, i, mb, blk; | |
309 | int slice_width = FFMIN(ctx->slice_width, ctx->mb_width - mb_x); | |
310 | uint8_t *Y, *C[2]; | |
311 | uint8_t *dst; | |
312 | int16_t *base_y = ctx->data_ptr[COEFF_LUMA]; | |
313 | int16_t *base_c = ctx->data_ptr[COEFF_CHROMA]; | |
314 | int16_t *ext_y = ctx->data_ptr[COEFF_LUMA_EXT]; | |
315 | int16_t *ext_c = ctx->data_ptr[COEFF_CHROMA_EXT]; | |
316 | const int ystride = ctx->frame->linesize[0]; | |
317 | ||
318 | Y = ctx->frame->data[0] + mb_x * 16 + mb_y * 16 * ystride; | |
319 | for (i = 0; i < 2; i++) | |
320 | C[i] = ctx->frame->data[i + 1] + mb_x * 8 | |
321 | + mb_y * 8 * ctx->frame->linesize[i + 1]; | |
322 | init_get_bits(&gb, src, src_size * 8); | |
323 | ||
324 | memset(ctx->slice_data, 0, | |
325 | sizeof(*ctx->slice_data) * slice_width * AIC_BAND_COEFFS); | |
326 | for (i = 0; i < NUM_BANDS; i++) | |
327 | if ((ret = aic_decode_coeffs(&gb, ctx->data_ptr[i], | |
328 | i, slice_width, | |
329 | !ctx->interlaced)) < 0) | |
330 | return ret; | |
331 | ||
332 | for (mb = 0; mb < slice_width; mb++) { | |
333 | for (blk = 0; blk < 4; blk++) { | |
334 | if (!ctx->interlaced) | |
335 | recombine_block(ctx->block, ctx->scantable.permutated, | |
336 | &base_y, &ext_y); | |
337 | else | |
338 | recombine_block_il(ctx->block, ctx->scantable.permutated, | |
339 | &base_y, &ext_y, blk); | |
340 | unquant_block(ctx->block, ctx->quant, ctx->quant_matrix); | |
341 | ctx->idsp.idct(ctx->block); | |
342 | ||
343 | if (!ctx->interlaced) { | |
344 | dst = Y + (blk >> 1) * 8 * ystride + (blk & 1) * 8; | |
345 | ctx->idsp.put_signed_pixels_clamped(ctx->block, dst, ystride); | |
346 | } else { | |
347 | dst = Y + (blk & 1) * 8 + (blk >> 1) * ystride; | |
348 | ctx->idsp.put_signed_pixels_clamped(ctx->block, dst, | |
349 | ystride * 2); | |
350 | } | |
351 | } | |
352 | Y += 16; | |
353 | ||
354 | for (blk = 0; blk < 2; blk++) { | |
355 | recombine_block(ctx->block, ctx->scantable.permutated, | |
356 | &base_c, &ext_c); | |
357 | unquant_block(ctx->block, ctx->quant, ctx->quant_matrix); | |
358 | ctx->idsp.idct(ctx->block); | |
359 | ctx->idsp.put_signed_pixels_clamped(ctx->block, C[blk], | |
360 | ctx->frame->linesize[blk + 1]); | |
361 | C[blk] += 8; | |
362 | } | |
363 | } | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
368 | static int aic_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, | |
369 | AVPacket *avpkt) | |
370 | { | |
371 | AICContext *ctx = avctx->priv_data; | |
372 | const uint8_t *buf = avpkt->data; | |
373 | int buf_size = avpkt->size; | |
374 | GetByteContext gb; | |
375 | uint32_t off; | |
376 | int x, y, ret; | |
377 | int slice_size; | |
378 | ||
379 | ctx->frame = data; | |
380 | ctx->frame->pict_type = AV_PICTURE_TYPE_I; | |
381 | ctx->frame->key_frame = 1; | |
382 | ||
383 | off = FFALIGN(AIC_HDR_SIZE + ctx->num_x_slices * ctx->mb_height * 2, 4); | |
384 | ||
385 | if (buf_size < off) { | |
386 | av_log(avctx, AV_LOG_ERROR, "Too small frame\n"); | |
387 | return AVERROR_INVALIDDATA; | |
388 | } | |
389 | ||
390 | if ((ret = aic_decode_header(ctx, buf, buf_size)) < 0) | |
391 | return ret; | |
392 | ||
393 | if ((ret = ff_get_buffer(avctx, ctx->frame, 0)) < 0) | |
394 | return ret; | |
395 | ||
396 | bytestream2_init(&gb, buf + AIC_HDR_SIZE, | |
397 | ctx->num_x_slices * ctx->mb_height * 2); | |
398 | ||
399 | for (y = 0; y < ctx->mb_height; y++) { | |
400 | for (x = 0; x < ctx->mb_width; x += ctx->slice_width) { | |
401 | slice_size = bytestream2_get_le16(&gb) * 4; | |
402 | if (slice_size + off > buf_size || !slice_size) { | |
403 | av_log(avctx, AV_LOG_ERROR, "Incorrect slice size\n"); | |
404 | return AVERROR_INVALIDDATA; | |
405 | } | |
406 | ||
407 | if ((ret = aic_decode_slice(ctx, x, y, | |
408 | buf + off, slice_size)) < 0) | |
409 | return ret; | |
410 | ||
411 | off += slice_size; | |
412 | } | |
413 | } | |
414 | ||
415 | *got_frame = 1; | |
416 | ||
417 | return avpkt->size; | |
418 | } | |
419 | ||
420 | static av_cold int aic_decode_init(AVCodecContext *avctx) | |
421 | { | |
422 | AICContext *ctx = avctx->priv_data; | |
423 | int i; | |
424 | uint8_t scan[64]; | |
425 | ||
426 | ctx->avctx = avctx; | |
427 | ||
428 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; | |
429 | ||
430 | ff_idctdsp_init(&ctx->idsp, avctx); | |
431 | ||
432 | for (i = 0; i < 64; i++) | |
433 | scan[i] = i; | |
434 | ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable, scan); | |
435 | for (i = 0; i < 64; i++) | |
436 | ctx->quant_matrix[ctx->idsp.idct_permutation[i]] = aic_quant_matrix[i]; | |
437 | ||
438 | ctx->mb_width = FFALIGN(avctx->width, 16) >> 4; | |
439 | ctx->mb_height = FFALIGN(avctx->height, 16) >> 4; | |
440 | ||
441 | ctx->num_x_slices = 16; | |
442 | ctx->slice_width = ctx->mb_width / 16; | |
443 | for (i = 1; i < 32; i++) { | |
444 | if (!(ctx->mb_width % i) && (ctx->mb_width / i < 32)) { | |
445 | ctx->slice_width = ctx->mb_width / i; | |
446 | ctx->num_x_slices = i; | |
447 | break; | |
448 | } | |
449 | } | |
450 | ||
451 | ctx->slice_data = av_malloc(ctx->slice_width * AIC_BAND_COEFFS | |
452 | * sizeof(*ctx->slice_data)); | |
453 | if (!ctx->slice_data) { | |
454 | av_log(avctx, AV_LOG_ERROR, "Error allocating slice buffer\n"); | |
455 | ||
456 | return AVERROR(ENOMEM); | |
457 | } | |
458 | ||
459 | for (i = 0; i < NUM_BANDS; i++) | |
460 | ctx->data_ptr[i] = ctx->slice_data + ctx->slice_width | |
461 | * aic_band_off[i]; | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
466 | static av_cold int aic_decode_close(AVCodecContext *avctx) | |
467 | { | |
468 | AICContext *ctx = avctx->priv_data; | |
469 | ||
470 | av_freep(&ctx->slice_data); | |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
475 | AVCodec ff_aic_decoder = { | |
476 | .name = "aic", | |
477 | .long_name = NULL_IF_CONFIG_SMALL("Apple Intermediate Codec"), | |
478 | .type = AVMEDIA_TYPE_VIDEO, | |
479 | .id = AV_CODEC_ID_AIC, | |
480 | .priv_data_size = sizeof(AICContext), | |
481 | .init = aic_decode_init, | |
482 | .close = aic_decode_close, | |
483 | .decode = aic_decode_frame, | |
484 | .capabilities = CODEC_CAP_DR1, | |
485 | }; |