Commit | Line | Data |
---|---|---|
1232a164 KS |
1 | /* |
2 | * Apple Intermediate Codec decoder | |
3 | * | |
4 | * Copyright (c) 2013 Konstantin Shishkov | |
5 | * | |
6 | * This file is part of Libav. | |
7 | * | |
8 | * Libav 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 | * Libav 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 Libav; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include "avcodec.h" | |
24 | #include "bytestream.h" | |
25 | #include "dsputil.h" | |
26 | #include "internal.h" | |
27 | #include "get_bits.h" | |
28 | #include "golomb.h" | |
29 | #include "unary.h" | |
30 | ||
31 | #define AIC_HDR_SIZE 24 | |
32 | #define AIC_BAND_COEFFS (64 + 32 + 192 + 96) | |
33 | ||
34 | enum AICBands { | |
35 | COEFF_LUMA = 0, | |
36 | COEFF_CHROMA, | |
37 | COEFF_LUMA_EXT, | |
38 | COEFF_CHROMA_EXT, | |
39 | NUM_BANDS | |
40 | }; | |
41 | ||
42 | static const int aic_num_band_coeffs[NUM_BANDS] = { 64, 32, 192, 96 }; | |
43 | ||
44 | static const int aic_band_off[NUM_BANDS] = { 0, 64, 96, 288 }; | |
45 | ||
46 | static const uint8_t aic_quant_matrix[64] = { | |
47 | 8, 16, 19, 22, 22, 26, 26, 27, | |
48 | 16, 16, 22, 22, 26, 27, 27, 29, | |
49 | 19, 22, 26, 26, 27, 29, 29, 35, | |
50 | 22, 24, 27, 27, 29, 32, 34, 38, | |
51 | 26, 27, 29, 29, 32, 35, 38, 46, | |
52 | 27, 29, 34, 34, 35, 40, 46, 56, | |
53 | 29, 34, 34, 37, 40, 48, 56, 69, | |
54 | 34, 37, 38, 40, 48, 58, 69, 83, | |
55 | }; | |
56 | ||
57 | static const uint8_t aic_y_scan[64] = { | |
58 | 0, 4, 1, 2, 5, 8, 12, 9, | |
59 | 6, 3, 7, 10, 13, 14, 11, 15, | |
60 | 47, 43, 46, 45, 42, 39, 35, 38, | |
61 | 41, 44, 40, 37, 34, 33, 36, 32, | |
62 | 16, 20, 17, 18, 21, 24, 28, 25, | |
63 | 22, 19, 23, 26, 29, 30, 27, 31, | |
64 | 63, 59, 62, 61, 58, 55, 51, 54, | |
65 | 57, 60, 56, 53, 50, 49, 52, 48, | |
66 | }; | |
67 | ||
68 | static const uint8_t aic_y_ext_scan[192] = { | |
69 | 64, 72, 65, 66, 73, 80, 88, 81, | |
70 | 74, 67, 75, 82, 89, 90, 83, 91, | |
71 | 0, 4, 1, 2, 5, 8, 12, 9, | |
72 | 6, 3, 7, 10, 13, 14, 11, 15, | |
73 | 16, 20, 17, 18, 21, 24, 28, 25, | |
74 | 22, 19, 23, 26, 29, 30, 27, 31, | |
75 | 155, 147, 154, 153, 146, 139, 131, 138, | |
76 | 145, 152, 144, 137, 130, 129, 136, 128, | |
77 | 47, 43, 46, 45, 42, 39, 35, 38, | |
78 | 41, 44, 40, 37, 34, 33, 36, 32, | |
79 | 63, 59, 62, 61, 58, 55, 51, 54, | |
80 | 57, 60, 56, 53, 50, 49, 52, 48, | |
81 | 96, 104, 97, 98, 105, 112, 120, 113, | |
82 | 106, 99, 107, 114, 121, 122, 115, 123, | |
83 | 68, 76, 69, 70, 77, 84, 92, 85, | |
84 | 78, 71, 79, 86, 93, 94, 87, 95, | |
85 | 100, 108, 101, 102, 109, 116, 124, 117, | |
86 | 110, 103, 111, 118, 125, 126, 119, 127, | |
87 | 187, 179, 186, 185, 178, 171, 163, 170, | |
88 | 177, 184, 176, 169, 162, 161, 168, 160, | |
89 | 159, 151, 158, 157, 150, 143, 135, 142, | |
90 | 149, 156, 148, 141, 134, 133, 140, 132, | |
91 | 191, 183, 190, 189, 182, 175, 167, 174, | |
92 | 181, 188, 180, 173, 166, 165, 172, 164, | |
93 | }; | |
94 | ||
95 | static const uint8_t aic_c_scan[64] = { | |
96 | 0, 4, 1, 2, 5, 8, 12, 9, | |
97 | 6, 3, 7, 10, 13, 14, 11, 15, | |
98 | 31, 27, 30, 29, 26, 23, 19, 22, | |
99 | 25, 28, 24, 21, 18, 17, 20, 16, | |
100 | 32, 36, 33, 34, 37, 40, 44, 41, | |
101 | 38, 35, 39, 42, 45, 46, 43, 47, | |
102 | 63, 59, 62, 61, 58, 55, 51, 54, | |
103 | 57, 60, 56, 53, 50, 49, 52, 48, | |
104 | }; | |
105 | ||
106 | static const uint8_t aic_c_ext_scan[192] = { | |
107 | 16, 24, 17, 18, 25, 32, 40, 33, | |
108 | 26, 19, 27, 34, 41, 42, 35, 43, | |
109 | 0, 4, 1, 2, 5, 8, 12, 9, | |
110 | 6, 3, 7, 10, 13, 14, 11, 15, | |
111 | 20, 28, 21, 22, 29, 36, 44, 37, | |
112 | 30, 23, 31, 38, 45, 46, 39, 47, | |
113 | 95, 87, 94, 93, 86, 79, 71, 78, | |
114 | 85, 92, 84, 77, 70, 69, 76, 68, | |
115 | 63, 59, 62, 61, 58, 55, 51, 54, | |
116 | 57, 60, 56, 53, 50, 49, 52, 48, | |
117 | 91, 83, 90, 89, 82, 75, 67, 74, | |
118 | 81, 88, 80, 73, 66, 65, 72, 64, | |
119 | 112, 120, 113, 114, 121, 128, 136, 129, | |
120 | 122, 115, 123, 130, 137, 138, 131, 139, | |
121 | 96, 100, 97, 98, 101, 104, 108, 105, | |
122 | 102, 99, 103, 106, 109, 110, 107, 111, | |
123 | 116, 124, 117, 118, 125, 132, 140, 133, | |
124 | 126, 119, 127, 134, 141, 142, 135, 143, | |
125 | 191, 183, 190, 189, 182, 175, 167, 174, | |
126 | 181, 188, 180, 173, 166, 165, 172, 164, | |
127 | 159, 155, 158, 157, 154, 151, 147, 150, | |
128 | 153, 156, 152, 149, 146, 145, 148, 144, | |
129 | 187, 179, 186, 185, 178, 171, 163, 170, | |
130 | 177, 184, 176, 169, 162, 161, 168, 160, | |
131 | }; | |
132 | ||
133 | static const uint8_t *aic_scan[NUM_BANDS] = { | |
134 | aic_y_scan, aic_c_scan, aic_y_ext_scan, aic_c_ext_scan | |
135 | }; | |
136 | ||
137 | typedef struct AICContext { | |
138 | AVCodecContext *avctx; | |
139 | AVFrame *frame; | |
140 | DSPContext dsp; | |
141 | ScanTable scantable; | |
142 | ||
143 | int num_x_slices; | |
144 | int slice_width; | |
145 | int mb_width, mb_height; | |
146 | int quant; | |
147 | int interlaced; | |
148 | ||
149 | int16_t *slice_data; | |
150 | int16_t *data_ptr[NUM_BANDS]; | |
151 | ||
152 | DECLARE_ALIGNED(16, int16_t, block)[64]; | |
153 | } AICContext; | |
154 | ||
155 | static int aic_decode_header(AICContext *ctx, const uint8_t *src, int size) | |
156 | { | |
157 | uint32_t frame_size; | |
158 | int width, height; | |
159 | ||
160 | if (src[0] != 1) { | |
161 | av_log(ctx->avctx, AV_LOG_ERROR, "Invalid version %d\n", src[0]); | |
162 | return AVERROR_INVALIDDATA; | |
163 | } | |
164 | if (src[1] != AIC_HDR_SIZE - 2) { | |
165 | av_log(ctx->avctx, AV_LOG_ERROR, "Invalid header size %d\n", src[1]); | |
166 | return AVERROR_INVALIDDATA; | |
167 | } | |
168 | frame_size = AV_RB32(src + 2); | |
169 | width = AV_RB16(src + 6); | |
170 | height = AV_RB16(src + 8); | |
171 | if (frame_size > size) { | |
172 | av_log(ctx->avctx, AV_LOG_ERROR, "Frame size should be %d got %d\n", | |
173 | frame_size, size); | |
174 | return AVERROR_INVALIDDATA; | |
175 | } | |
176 | if (width != ctx->avctx->width || height != ctx->avctx->height) { | |
177 | av_log(ctx->avctx, AV_LOG_ERROR, | |
178 | "Picture dimension changed: old: %d x %d, new: %d x %d\n", | |
179 | ctx->avctx->width, ctx->avctx->height, width, height); | |
180 | return AVERROR_INVALIDDATA; | |
181 | } | |
182 | ctx->quant = src[15]; | |
183 | ctx->interlaced = ((src[16] >> 4) == 3); | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | #define GET_CODE(val, type, add_bits) \ | |
189 | do { \ | |
190 | if (type) \ | |
191 | val = get_ue_golomb(gb); \ | |
192 | else \ | |
193 | val = get_unary(gb, 1, 31); \ | |
194 | if (add_bits) \ | |
195 | val = (val << add_bits) + get_bits(gb, add_bits); \ | |
196 | } while (0) | |
197 | ||
198 | static int aic_decode_coeffs(GetBitContext *gb, int16_t *dst, | |
199 | int band, int slice_width) | |
200 | { | |
201 | int has_skips, coeff_type, coeff_bits, skip_type, skip_bits; | |
202 | const int num_coeffs = aic_num_band_coeffs[band]; | |
203 | const uint8_t *scan = aic_scan[band]; | |
204 | int mb, idx, val; | |
205 | ||
206 | has_skips = get_bits1(gb); | |
207 | coeff_type = get_bits1(gb); | |
208 | coeff_bits = get_bits(gb, 3); | |
209 | ||
210 | if (has_skips) { | |
211 | skip_type = get_bits1(gb); | |
212 | skip_bits = get_bits(gb, 3); | |
213 | ||
214 | for (mb = 0; mb < slice_width; mb++) { | |
215 | idx = -1; | |
216 | do { | |
217 | GET_CODE(val, skip_type, skip_bits); | |
218 | idx += val + 1; | |
219 | if (idx >= num_coeffs) | |
220 | break; | |
221 | GET_CODE(val, coeff_type, coeff_bits); | |
222 | val++; | |
223 | if (val >= 0x10000) | |
224 | return AVERROR_INVALIDDATA; | |
225 | dst[scan[idx]] = val; | |
226 | } while (idx < num_coeffs - 1); | |
227 | dst += num_coeffs; | |
228 | } | |
229 | } else { | |
230 | for (mb = 0; mb < slice_width; mb++) { | |
231 | for (idx = 0; idx < num_coeffs; idx++) { | |
232 | GET_CODE(val, coeff_type, coeff_bits); | |
233 | if (val >= 0x10000) | |
234 | return AVERROR_INVALIDDATA; | |
235 | dst[scan[idx]] = val; | |
236 | } | |
237 | dst += num_coeffs; | |
238 | } | |
239 | } | |
240 | return 0; | |
241 | } | |
242 | ||
243 | static void recombine_block(int16_t *dst, const uint8_t *scan, | |
244 | int16_t **base, int16_t **ext) | |
245 | { | |
246 | int i, j; | |
247 | ||
248 | for (i = 0; i < 4; i++) { | |
249 | for (j = 0; j < 4; j++) | |
250 | dst[scan[i * 8 + j]] = (*base)[j]; | |
251 | for (j = 0; j < 4; j++) | |
252 | dst[scan[i * 8 + j + 4]] = (*ext)[j]; | |
253 | *base += 4; | |
254 | *ext += 4; | |
255 | } | |
256 | for (; i < 8; i++) { | |
257 | for (j = 0; j < 8; j++) | |
258 | dst[scan[i * 8 + j]] = (*ext)[j]; | |
259 | *ext += 8; | |
260 | } | |
261 | } | |
262 | ||
263 | static void recombine_block_il(int16_t *dst, const uint8_t *scan, | |
264 | int16_t **base, int16_t **ext, | |
265 | int block_no) | |
266 | { | |
267 | int i, j; | |
268 | ||
269 | if (block_no < 2) { | |
270 | for (i = 0; i < 8; i++) { | |
271 | for (j = 0; j < 4; j++) | |
272 | dst[scan[i * 8 + j]] = (*base)[j]; | |
273 | for (j = 0; j < 4; j++) | |
274 | dst[scan[i * 8 + j + 4]] = (*ext)[j]; | |
275 | *base += 4; | |
276 | *ext += 4; | |
277 | } | |
278 | } else { | |
279 | for (i = 0; i < 64; i++) | |
280 | dst[scan[i]] = (*ext)[i]; | |
281 | *ext += 64; | |
282 | } | |
283 | } | |
284 | ||
285 | static void unquant_block(int16_t *block, int q) | |
286 | { | |
287 | int i; | |
288 | ||
289 | for (i = 0; i < 64; i++) { | |
290 | int val = (uint16_t)block[i]; | |
291 | int sign = val & 1; | |
292 | ||
293 | block[i] = (((val >> 1) ^ -sign) * q * aic_quant_matrix[i] >> 4) | |
294 | + sign; | |
295 | } | |
296 | } | |
297 | ||
298 | static int aic_decode_slice(AICContext *ctx, int mb_x, int mb_y, | |
299 | const uint8_t *src, int src_size) | |
300 | { | |
301 | GetBitContext gb; | |
302 | int ret, i, mb, blk; | |
303 | int slice_width = FFMIN(ctx->slice_width, ctx->mb_width - mb_x); | |
304 | uint8_t *Y, *C[2]; | |
305 | uint8_t *dst; | |
306 | int16_t *base_y = ctx->data_ptr[COEFF_LUMA]; | |
307 | int16_t *base_c = ctx->data_ptr[COEFF_CHROMA]; | |
308 | int16_t *ext_y = ctx->data_ptr[COEFF_LUMA_EXT]; | |
309 | int16_t *ext_c = ctx->data_ptr[COEFF_CHROMA_EXT]; | |
310 | const int ystride = ctx->frame->linesize[0]; | |
311 | ||
312 | Y = ctx->frame->data[0] + mb_x * 16 + mb_y * 16 * ystride; | |
313 | for (i = 0; i < 2; i++) | |
314 | C[i] = ctx->frame->data[i + 1] + mb_x * 8 | |
315 | + mb_y * 8 * ctx->frame->linesize[i + 1]; | |
316 | init_get_bits(&gb, src, src_size * 8); | |
317 | ||
318 | memset(ctx->slice_data, 0, | |
319 | sizeof(*ctx->slice_data) * slice_width * AIC_BAND_COEFFS); | |
320 | for (i = 0; i < NUM_BANDS; i++) | |
321 | if ((ret = aic_decode_coeffs(&gb, ctx->data_ptr[i], | |
322 | i, slice_width)) < 0) | |
323 | return ret; | |
324 | ||
325 | for (mb = 0; mb < slice_width; mb++) { | |
326 | for (blk = 0; blk < 4; blk++) { | |
327 | if (!ctx->interlaced) | |
328 | recombine_block(ctx->block, ctx->scantable.permutated, | |
329 | &base_y, &ext_y); | |
330 | else | |
331 | recombine_block_il(ctx->block, ctx->scantable.permutated, | |
332 | &base_y, &ext_y, blk); | |
333 | unquant_block(ctx->block, ctx->quant); | |
334 | ctx->dsp.idct(ctx->block); | |
335 | ||
336 | if (!ctx->interlaced) { | |
337 | dst = Y + (blk & 1) * 8 * ystride + (blk >> 1) * 8; | |
338 | ctx->dsp.put_signed_pixels_clamped(ctx->block, dst, | |
339 | ystride); | |
340 | } else { | |
341 | dst = Y + (blk & 1) * 8 + (blk >> 1) * ystride; | |
342 | ctx->dsp.put_signed_pixels_clamped(ctx->block, dst, | |
343 | ystride * 2); | |
344 | } | |
345 | } | |
346 | Y += 16; | |
347 | ||
348 | for (blk = 0; blk < 2; blk++) { | |
349 | recombine_block(ctx->block, ctx->scantable.permutated, | |
350 | &base_c, &ext_c); | |
351 | unquant_block(ctx->block, ctx->quant); | |
352 | ctx->dsp.idct(ctx->block); | |
353 | ctx->dsp.put_signed_pixels_clamped(ctx->block, C[blk], | |
354 | ctx->frame->linesize[blk + 1]); | |
355 | C[blk] += 8; | |
356 | } | |
357 | } | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
362 | static int aic_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, | |
363 | AVPacket *avpkt) | |
364 | { | |
365 | AICContext *ctx = avctx->priv_data; | |
366 | const uint8_t *buf = avpkt->data; | |
367 | int buf_size = avpkt->size; | |
368 | GetByteContext gb; | |
369 | uint32_t off; | |
370 | int x, y, ret; | |
371 | int slice_size; | |
372 | ||
373 | ctx->frame = data; | |
374 | ctx->frame->pict_type = AV_PICTURE_TYPE_I; | |
375 | ctx->frame->key_frame = 1; | |
376 | ||
377 | off = FFALIGN(AIC_HDR_SIZE + ctx->num_x_slices * ctx->mb_height * 2, 4); | |
378 | ||
379 | if (buf_size < off) { | |
380 | av_log(avctx, AV_LOG_ERROR, "Too small frame\n"); | |
381 | return AVERROR_INVALIDDATA; | |
382 | } | |
383 | ||
384 | if ((ret = aic_decode_header(ctx, buf, buf_size)) < 0) | |
385 | return ret; | |
386 | ||
387 | if ((ret = ff_get_buffer(avctx, ctx->frame, 0)) < 0) | |
388 | return ret; | |
389 | ||
390 | bytestream2_init(&gb, buf + AIC_HDR_SIZE, | |
391 | ctx->num_x_slices * ctx->mb_height * 2); | |
392 | ||
393 | for (y = 0; y < ctx->mb_height; y++) { | |
394 | for (x = 0; x < ctx->mb_width; x += ctx->slice_width) { | |
395 | slice_size = bytestream2_get_le16(&gb) * 4; | |
396 | if (slice_size + off > buf_size || !slice_size) { | |
397 | av_log(avctx, AV_LOG_ERROR, "Incorrect slice size\n"); | |
398 | return AVERROR_INVALIDDATA; | |
399 | } | |
400 | ||
401 | if ((ret = aic_decode_slice(ctx, x, y, | |
402 | buf + off, slice_size)) < 0) | |
403 | return ret; | |
404 | ||
405 | off += slice_size; | |
406 | } | |
407 | } | |
408 | ||
409 | *got_frame = 1; | |
410 | ||
411 | return avpkt->size; | |
412 | } | |
413 | ||
414 | static av_cold int aic_decode_init(AVCodecContext *avctx) | |
415 | { | |
416 | AICContext *ctx = avctx->priv_data; | |
417 | int i; | |
418 | uint8_t scan[64]; | |
419 | ||
420 | ctx->avctx = avctx; | |
421 | ||
422 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; | |
423 | ||
424 | ff_dsputil_init(&ctx->dsp, avctx); | |
425 | ||
426 | for (i = 0; i < 64; i++) | |
427 | scan[i] = i; | |
428 | ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, scan); | |
429 | ||
430 | ctx->mb_width = FFALIGN(avctx->width, 16) >> 4; | |
431 | ctx->mb_height = FFALIGN(avctx->height, 16) >> 4; | |
432 | ||
433 | ctx->num_x_slices = 16; | |
434 | ctx->slice_width = ctx->mb_width / 16; | |
435 | for (i = 1; i < 32; i++) { | |
436 | if (!(ctx->mb_width % i) && (ctx->mb_width / i < 32)) { | |
437 | ctx->slice_width = ctx->mb_width / i; | |
438 | ctx->num_x_slices = i; | |
439 | break; | |
440 | } | |
441 | } | |
442 | ||
443 | ctx->slice_data = av_malloc(ctx->slice_width * AIC_BAND_COEFFS | |
444 | * sizeof(*ctx->slice_data)); | |
445 | if (!ctx->slice_data) { | |
446 | av_log(avctx, AV_LOG_ERROR, "Error allocating slice buffer\n"); | |
447 | ||
448 | return AVERROR(ENOMEM); | |
449 | } | |
450 | ||
451 | for (i = 0; i < NUM_BANDS; i++) | |
452 | ctx->data_ptr[i] = ctx->slice_data + ctx->slice_width | |
453 | * aic_band_off[i]; | |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
458 | static av_cold int aic_decode_close(AVCodecContext *avctx) | |
459 | { | |
460 | AICContext *ctx = avctx->priv_data; | |
461 | ||
462 | av_freep(&ctx->slice_data); | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | AVCodec ff_aic_decoder = { | |
468 | .name = "aic", | |
469 | .type = AVMEDIA_TYPE_VIDEO, | |
470 | .id = AV_CODEC_ID_AIC, | |
471 | .priv_data_size = sizeof(AICContext), | |
472 | .init = aic_decode_init, | |
473 | .close = aic_decode_close, | |
474 | .decode = aic_decode_frame, | |
475 | .capabilities = CODEC_CAP_DR1, | |
476 | .long_name = NULL_IF_CONFIG_SMALL("Apple Intermediate Codec") | |
477 | }; |