| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 "libavutil/mem.h" | ||
| 26 | #include "libavutil/mem_internal.h" | ||
| 27 | |||
| 28 | #include "avcodec.h" | ||
| 29 | #include "bytestream.h" | ||
| 30 | #include "codec_internal.h" | ||
| 31 | #include "get_bits.h" | ||
| 32 | #include "golomb.h" | ||
| 33 | #include "idctdsp.h" | ||
| 34 | #include "thread.h" | ||
| 35 | #include "unary.h" | ||
| 36 | |||
| 37 | #define AIC_HDR_SIZE 24 | ||
| 38 | #define AIC_BAND_COEFFS (64 + 32 + 192 + 96) | ||
| 39 | |||
| 40 | enum AICBands { | ||
| 41 | COEFF_LUMA = 0, | ||
| 42 | COEFF_CHROMA, | ||
| 43 | COEFF_LUMA_EXT, | ||
| 44 | COEFF_CHROMA_EXT, | ||
| 45 | NUM_BANDS | ||
| 46 | }; | ||
| 47 | |||
| 48 | static const uint8_t aic_num_band_coeffs[NUM_BANDS] = { 64, 32, 192, 96 }; | ||
| 49 | |||
| 50 | static const uint16_t aic_band_off[NUM_BANDS] = { 0, 64, 96, 288 }; | ||
| 51 | |||
| 52 | static const uint8_t aic_quant_matrix[64] = { | ||
| 53 | 8, 16, 19, 22, 22, 26, 26, 27, | ||
| 54 | 16, 16, 22, 22, 26, 27, 27, 29, | ||
| 55 | 19, 22, 26, 26, 27, 29, 29, 35, | ||
| 56 | 22, 24, 27, 27, 29, 32, 34, 38, | ||
| 57 | 26, 27, 29, 29, 32, 35, 38, 46, | ||
| 58 | 27, 29, 34, 34, 35, 40, 46, 56, | ||
| 59 | 29, 34, 34, 37, 40, 48, 56, 69, | ||
| 60 | 34, 37, 38, 40, 48, 58, 69, 83, | ||
| 61 | }; | ||
| 62 | |||
| 63 | static const uint8_t aic_y_scan[64] = { | ||
| 64 | 0, 4, 1, 2, 5, 8, 12, 9, | ||
| 65 | 6, 3, 7, 10, 13, 14, 11, 15, | ||
| 66 | 47, 43, 46, 45, 42, 39, 35, 38, | ||
| 67 | 41, 44, 40, 37, 34, 33, 36, 32, | ||
| 68 | 16, 20, 17, 18, 21, 24, 28, 25, | ||
| 69 | 22, 19, 23, 26, 29, 30, 27, 31, | ||
| 70 | 63, 59, 62, 61, 58, 55, 51, 54, | ||
| 71 | 57, 60, 56, 53, 50, 49, 52, 48, | ||
| 72 | }; | ||
| 73 | |||
| 74 | static const uint8_t aic_y_ext_scan[192] = { | ||
| 75 | 64, 72, 65, 66, 73, 80, 88, 81, | ||
| 76 | 74, 67, 75, 82, 89, 90, 83, 91, | ||
| 77 | 0, 4, 1, 2, 5, 8, 12, 9, | ||
| 78 | 6, 3, 7, 10, 13, 14, 11, 15, | ||
| 79 | 16, 20, 17, 18, 21, 24, 28, 25, | ||
| 80 | 22, 19, 23, 26, 29, 30, 27, 31, | ||
| 81 | 155, 147, 154, 153, 146, 139, 131, 138, | ||
| 82 | 145, 152, 144, 137, 130, 129, 136, 128, | ||
| 83 | 47, 43, 46, 45, 42, 39, 35, 38, | ||
| 84 | 41, 44, 40, 37, 34, 33, 36, 32, | ||
| 85 | 63, 59, 62, 61, 58, 55, 51, 54, | ||
| 86 | 57, 60, 56, 53, 50, 49, 52, 48, | ||
| 87 | 96, 104, 97, 98, 105, 112, 120, 113, | ||
| 88 | 106, 99, 107, 114, 121, 122, 115, 123, | ||
| 89 | 68, 76, 69, 70, 77, 84, 92, 85, | ||
| 90 | 78, 71, 79, 86, 93, 94, 87, 95, | ||
| 91 | 100, 108, 101, 102, 109, 116, 124, 117, | ||
| 92 | 110, 103, 111, 118, 125, 126, 119, 127, | ||
| 93 | 187, 179, 186, 185, 178, 171, 163, 170, | ||
| 94 | 177, 184, 176, 169, 162, 161, 168, 160, | ||
| 95 | 159, 151, 158, 157, 150, 143, 135, 142, | ||
| 96 | 149, 156, 148, 141, 134, 133, 140, 132, | ||
| 97 | 191, 183, 190, 189, 182, 175, 167, 174, | ||
| 98 | 181, 188, 180, 173, 166, 165, 172, 164, | ||
| 99 | }; | ||
| 100 | |||
| 101 | static const uint8_t aic_c_scan[64] = { | ||
| 102 | 0, 4, 1, 2, 5, 8, 12, 9, | ||
| 103 | 6, 3, 7, 10, 13, 14, 11, 15, | ||
| 104 | 31, 27, 30, 29, 26, 23, 19, 22, | ||
| 105 | 25, 28, 24, 21, 18, 17, 20, 16, | ||
| 106 | 32, 36, 33, 34, 37, 40, 44, 41, | ||
| 107 | 38, 35, 39, 42, 45, 46, 43, 47, | ||
| 108 | 63, 59, 62, 61, 58, 55, 51, 54, | ||
| 109 | 57, 60, 56, 53, 50, 49, 52, 48, | ||
| 110 | }; | ||
| 111 | |||
| 112 | static const uint8_t aic_c_ext_scan[192] = { | ||
| 113 | 16, 24, 17, 18, 25, 32, 40, 33, | ||
| 114 | 26, 19, 27, 34, 41, 42, 35, 43, | ||
| 115 | 0, 4, 1, 2, 5, 8, 12, 9, | ||
| 116 | 6, 3, 7, 10, 13, 14, 11, 15, | ||
| 117 | 20, 28, 21, 22, 29, 36, 44, 37, | ||
| 118 | 30, 23, 31, 38, 45, 46, 39, 47, | ||
| 119 | 95, 87, 94, 93, 86, 79, 71, 78, | ||
| 120 | 85, 92, 84, 77, 70, 69, 76, 68, | ||
| 121 | 63, 59, 62, 61, 58, 55, 51, 54, | ||
| 122 | 57, 60, 56, 53, 50, 49, 52, 48, | ||
| 123 | 91, 83, 90, 89, 82, 75, 67, 74, | ||
| 124 | 81, 88, 80, 73, 66, 65, 72, 64, | ||
| 125 | 112, 120, 113, 114, 121, 128, 136, 129, | ||
| 126 | 122, 115, 123, 130, 137, 138, 131, 139, | ||
| 127 | 96, 100, 97, 98, 101, 104, 108, 105, | ||
| 128 | 102, 99, 103, 106, 109, 110, 107, 111, | ||
| 129 | 116, 124, 117, 118, 125, 132, 140, 133, | ||
| 130 | 126, 119, 127, 134, 141, 142, 135, 143, | ||
| 131 | 191, 183, 190, 189, 182, 175, 167, 174, | ||
| 132 | 181, 188, 180, 173, 166, 165, 172, 164, | ||
| 133 | 159, 155, 158, 157, 154, 151, 147, 150, | ||
| 134 | 153, 156, 152, 149, 146, 145, 148, 144, | ||
| 135 | 187, 179, 186, 185, 178, 171, 163, 170, | ||
| 136 | 177, 184, 176, 169, 162, 161, 168, 160, | ||
| 137 | }; | ||
| 138 | |||
| 139 | static const uint8_t * const aic_scan[NUM_BANDS] = { | ||
| 140 | aic_y_scan, aic_c_scan, aic_y_ext_scan, aic_c_ext_scan | ||
| 141 | }; | ||
| 142 | |||
| 143 | typedef struct AICContext { | ||
| 144 | AVCodecContext *avctx; | ||
| 145 | AVFrame *frame; | ||
| 146 | IDCTDSPContext idsp; | ||
| 147 | |||
| 148 | int num_x_slices; | ||
| 149 | int slice_width; | ||
| 150 | int mb_width, mb_height; | ||
| 151 | int quant; | ||
| 152 | int interlaced; | ||
| 153 | |||
| 154 | int16_t *slice_data; | ||
| 155 | int16_t *data_ptr[NUM_BANDS]; | ||
| 156 | |||
| 157 | DECLARE_ALIGNED(16, int16_t, block)[64]; | ||
| 158 | DECLARE_ALIGNED(16, uint8_t, quant_matrix)[64]; | ||
| 159 | } AICContext; | ||
| 160 | |||
| 161 | 73 | static int aic_decode_header(AICContext *ctx, const uint8_t *src, int size) | |
| 162 | { | ||
| 163 | uint32_t frame_size; | ||
| 164 | int width, height; | ||
| 165 | |||
| 166 |
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73 | if (src[0] != 1) { |
| 167 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "Invalid version %d\n", src[0]); | |
| 168 | ✗ | return AVERROR_INVALIDDATA; | |
| 169 | } | ||
| 170 |
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73 | if (src[1] != AIC_HDR_SIZE - 2) { |
| 171 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "Invalid header size %d\n", src[1]); | |
| 172 | ✗ | return AVERROR_INVALIDDATA; | |
| 173 | } | ||
| 174 | 73 | frame_size = AV_RB32(src + 2); | |
| 175 | 73 | width = AV_RB16(src + 6); | |
| 176 | 73 | height = AV_RB16(src + 8); | |
| 177 |
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73 | if (frame_size > size) { |
| 178 | 1 | av_log(ctx->avctx, AV_LOG_ERROR, "Frame size should be %"PRIu32" got %d\n", | |
| 179 | frame_size, size); | ||
| 180 | 1 | return AVERROR_INVALIDDATA; | |
| 181 | } | ||
| 182 |
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72 | if (width != ctx->avctx->width || height != ctx->avctx->height) { |
| 183 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, | |
| 184 | "Picture dimension changed: old: %d x %d, new: %d x %d\n", | ||
| 185 | ✗ | ctx->avctx->width, ctx->avctx->height, width, height); | |
| 186 | ✗ | return AVERROR_INVALIDDATA; | |
| 187 | } | ||
| 188 | 72 | ctx->quant = src[15]; | |
| 189 | 72 | ctx->interlaced = ((src[16] >> 4) == 3); | |
| 190 | |||
| 191 | 72 | return 0; | |
| 192 | } | ||
| 193 | |||
| 194 | #define GET_CODE(val, type, add_bits) \ | ||
| 195 | do { \ | ||
| 196 | if (type) \ | ||
| 197 | val = get_ue_golomb(gb); \ | ||
| 198 | else \ | ||
| 199 | val = get_unary(gb, 1, 31); \ | ||
| 200 | if (add_bits) \ | ||
| 201 | val = (val << add_bits) + get_bits(gb, add_bits); \ | ||
| 202 | } while (0) | ||
| 203 | |||
| 204 | 15888 | static int aic_decode_coeffs(GetBitContext *gb, int16_t *dst, | |
| 205 | int band, int slice_width, int force_chroma) | ||
| 206 | { | ||
| 207 | int has_skips, coeff_type, coeff_bits, skip_type, skip_bits; | ||
| 208 | 15888 | const int num_coeffs = aic_num_band_coeffs[band]; | |
| 209 | 15888 | const uint8_t *scan = aic_scan[band | force_chroma]; | |
| 210 | int mb, idx; | ||
| 211 | unsigned val; | ||
| 212 | |||
| 213 |
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15888 | if (get_bits_left(gb) < 5) |
| 214 | ✗ | return AVERROR_INVALIDDATA; | |
| 215 | |||
| 216 | 15888 | has_skips = get_bits1(gb); | |
| 217 | 15888 | coeff_type = get_bits1(gb); | |
| 218 | 15888 | coeff_bits = get_bits(gb, 3); | |
| 219 | |||
| 220 |
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15888 | if (has_skips) { |
| 221 | 13996 | skip_type = get_bits1(gb); | |
| 222 | 13996 | skip_bits = get_bits(gb, 3); | |
| 223 | |||
| 224 |
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437433 | for (mb = 0; mb < slice_width; mb++) { |
| 225 | 423437 | idx = -1; | |
| 226 | do { | ||
| 227 |
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5032630 | GET_CODE(val, skip_type, skip_bits); |
| 228 |
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5032630 | if (val >= 0x10000) |
| 229 | ✗ | return AVERROR_INVALIDDATA; | |
| 230 | 5032630 | idx += val + 1; | |
| 231 |
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5032630 | if (idx >= num_coeffs) |
| 232 | 252068 | break; | |
| 233 |
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4780562 | GET_CODE(val, coeff_type, coeff_bits); |
| 234 | 4780562 | val++; | |
| 235 |
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4780562 | if (val >= 0x10000) |
| 236 | ✗ | return AVERROR_INVALIDDATA; | |
| 237 | 4780562 | dst[scan[idx]] = val; | |
| 238 |
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4780562 | } while (idx < num_coeffs - 1); |
| 239 | 423437 | dst += num_coeffs; | |
| 240 | } | ||
| 241 | } else { | ||
| 242 |
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58743 | for (mb = 0; mb < slice_width; mb++) { |
| 243 |
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10576595 | for (idx = 0; idx < num_coeffs; idx++) { |
| 244 |
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10519744 | GET_CODE(val, coeff_type, coeff_bits); |
| 245 |
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10519744 | if (val >= 0x10000) |
| 246 | ✗ | return AVERROR_INVALIDDATA; | |
| 247 | 10519744 | dst[scan[idx]] = val; | |
| 248 | } | ||
| 249 | 56851 | dst += num_coeffs; | |
| 250 | } | ||
| 251 | } | ||
| 252 | 15888 | return 0; | |
| 253 | } | ||
| 254 | |||
| 255 | 353232 | static void recombine_block(int16_t *dst, const uint8_t *scan, | |
| 256 | int16_t **base, int16_t **ext) | ||
| 257 | { | ||
| 258 | int i, j; | ||
| 259 | |||
| 260 |
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1766160 | for (i = 0; i < 4; i++) { |
| 261 |
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7064640 | for (j = 0; j < 4; j++) |
| 262 | 5651712 | dst[scan[i * 8 + j]] = (*base)[j]; | |
| 263 |
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7064640 | for (j = 0; j < 4; j++) |
| 264 | 5651712 | dst[scan[i * 8 + j + 4]] = (*ext)[j]; | |
| 265 | 1412928 | *base += 4; | |
| 266 | 1412928 | *ext += 4; | |
| 267 | } | ||
| 268 |
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1766160 | for (; i < 8; i++) { |
| 269 |
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12716352 | for (j = 0; j < 8; j++) |
| 270 | 11303424 | dst[scan[i * 8 + j]] = (*ext)[j]; | |
| 271 | 1412928 | *ext += 8; | |
| 272 | } | ||
| 273 | 353232 | } | |
| 274 | |||
| 275 | 367200 | static void recombine_block_il(int16_t *dst, const uint8_t *scan, | |
| 276 | int16_t **base, int16_t **ext, | ||
| 277 | int block_no) | ||
| 278 | { | ||
| 279 | int i, j; | ||
| 280 | |||
| 281 |
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367200 | if (block_no < 2) { |
| 282 |
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1652400 | for (i = 0; i < 8; i++) { |
| 283 |
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7344000 | for (j = 0; j < 4; j++) |
| 284 | 5875200 | dst[scan[i * 8 + j]] = (*base)[j]; | |
| 285 |
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7344000 | for (j = 0; j < 4; j++) |
| 286 | 5875200 | dst[scan[i * 8 + j + 4]] = (*ext)[j]; | |
| 287 | 1468800 | *base += 4; | |
| 288 | 1468800 | *ext += 4; | |
| 289 | } | ||
| 290 | } else { | ||
| 291 |
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11934000 | for (i = 0; i < 64; i++) |
| 292 | 11750400 | dst[scan[i]] = (*ext)[i]; | |
| 293 | 183600 | *ext += 64; | |
| 294 | } | ||
| 295 | 367200 | } | |
| 296 | |||
| 297 | 720432 | static void unquant_block(int16_t *block, int q, uint8_t *quant_matrix) | |
| 298 | { | ||
| 299 | int i; | ||
| 300 | |||
| 301 |
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46828080 | for (i = 0; i < 64; i++) { |
| 302 | 46107648 | int val = (uint16_t)block[i]; | |
| 303 | 46107648 | int sign = val & 1; | |
| 304 | |||
| 305 | 46107648 | block[i] = (((val >> 1) ^ -sign) * q * quant_matrix[i] >> 4) | |
| 306 | 46107648 | + sign; | |
| 307 | } | ||
| 308 | 720432 | } | |
| 309 | |||
| 310 | 3972 | static int aic_decode_slice(AICContext *ctx, int mb_x, int mb_y, | |
| 311 | const uint8_t *src, int src_size) | ||
| 312 | { | ||
| 313 | GetBitContext gb; | ||
| 314 | int ret, i, mb, blk; | ||
| 315 | 3972 | int slice_width = FFMIN(ctx->slice_width, ctx->mb_width - mb_x); | |
| 316 |
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3972 | int last_row = mb_y && mb_y == ctx->mb_height - 1; |
| 317 | int y_pos, c_pos; | ||
| 318 | uint8_t *Y, *C[2]; | ||
| 319 | uint8_t *dst; | ||
| 320 | 3972 | int16_t *base_y = ctx->data_ptr[COEFF_LUMA]; | |
| 321 | 3972 | int16_t *base_c = ctx->data_ptr[COEFF_CHROMA]; | |
| 322 | 3972 | int16_t *ext_y = ctx->data_ptr[COEFF_LUMA_EXT]; | |
| 323 | 3972 | int16_t *ext_c = ctx->data_ptr[COEFF_CHROMA_EXT]; | |
| 324 | 3972 | const int ystride = ctx->frame->linesize[0]; | |
| 325 | |||
| 326 |
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3972 | if (last_row) { |
| 327 | 102 | y_pos = (ctx->avctx->height - 16); | |
| 328 | 102 | c_pos = ((ctx->avctx->height+1)/2 - 8); | |
| 329 | } else { | ||
| 330 | 3870 | y_pos = mb_y * 16; | |
| 331 | 3870 | c_pos = mb_y * 8; | |
| 332 | } | ||
| 333 | |||
| 334 | 3972 | Y = ctx->frame->data[0] + mb_x * 16 + y_pos * ystride; | |
| 335 |
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11916 | for (i = 0; i < 2; i++) |
| 336 | 7944 | C[i] = ctx->frame->data[i + 1] + mb_x * 8 | |
| 337 | 7944 | + c_pos * ctx->frame->linesize[i + 1]; | |
| 338 | 3972 | init_get_bits(&gb, src, src_size * 8); | |
| 339 | |||
| 340 | 3972 | memset(ctx->slice_data, 0, | |
| 341 | sizeof(*ctx->slice_data) * slice_width * AIC_BAND_COEFFS); | ||
| 342 |
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19860 | for (i = 0; i < NUM_BANDS; i++) |
| 343 |
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15888 | if ((ret = aic_decode_coeffs(&gb, ctx->data_ptr[i], |
| 344 | i, slice_width, | ||
| 345 | 15888 | !ctx->interlaced)) < 0) | |
| 346 | ✗ | return ret; | |
| 347 | |||
| 348 |
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124044 | for (mb = 0; mb < slice_width; mb++) { |
| 349 |
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600360 | for (blk = 0; blk < 4; blk++) { |
| 350 |
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480288 | if (!ctx->interlaced) |
| 351 | 113088 | recombine_block(ctx->block, ctx->idsp.idct_permutation, | |
| 352 | &base_y, &ext_y); | ||
| 353 | else | ||
| 354 | 367200 | recombine_block_il(ctx->block, ctx->idsp.idct_permutation, | |
| 355 | &base_y, &ext_y, blk); | ||
| 356 | 480288 | unquant_block(ctx->block, ctx->quant, ctx->quant_matrix); | |
| 357 | 480288 | ctx->idsp.idct(ctx->block); | |
| 358 | |||
| 359 |
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480288 | if (!ctx->interlaced) { |
| 360 | 113088 | dst = Y + (blk >> 1) * 8 * ystride + (blk & 1) * 8; | |
| 361 | 113088 | ctx->idsp.put_signed_pixels_clamped(ctx->block, dst, ystride); | |
| 362 | } else { | ||
| 363 | 367200 | dst = Y + (blk & 1) * 8 + (blk >> 1) * ystride; | |
| 364 | 367200 | ctx->idsp.put_signed_pixels_clamped(ctx->block, dst, | |
| 365 | 367200 | ystride * 2); | |
| 366 | } | ||
| 367 | } | ||
| 368 | 120072 | Y += 16; | |
| 369 | |||
| 370 |
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360216 | for (blk = 0; blk < 2; blk++) { |
| 371 | 240144 | recombine_block(ctx->block, ctx->idsp.idct_permutation, | |
| 372 | &base_c, &ext_c); | ||
| 373 | 240144 | unquant_block(ctx->block, ctx->quant, ctx->quant_matrix); | |
| 374 | 240144 | ctx->idsp.idct(ctx->block); | |
| 375 | 240144 | ctx->idsp.put_signed_pixels_clamped(ctx->block, C[blk], | |
| 376 | 240144 | ctx->frame->linesize[blk + 1]); | |
| 377 | 240144 | C[blk] += 8; | |
| 378 | } | ||
| 379 | } | ||
| 380 | |||
| 381 | 3972 | return 0; | |
| 382 | } | ||
| 383 | |||
| 384 | 73 | static int aic_decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
| 385 | int *got_frame, AVPacket *avpkt) | ||
| 386 | { | ||
| 387 | 73 | AICContext *ctx = avctx->priv_data; | |
| 388 | 73 | const uint8_t *buf = avpkt->data; | |
| 389 | 73 | int buf_size = avpkt->size; | |
| 390 | GetByteContext gb; | ||
| 391 | uint32_t off; | ||
| 392 | int x, y, ret; | ||
| 393 | int slice_size; | ||
| 394 | |||
| 395 | 73 | ctx->frame = frame; | |
| 396 | |||
| 397 | 73 | off = FFALIGN(AIC_HDR_SIZE + ctx->num_x_slices * ctx->mb_height * 2, 4); | |
| 398 | |||
| 399 |
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73 | if (buf_size < off) { |
| 400 | ✗ | av_log(avctx, AV_LOG_ERROR, "Too small frame\n"); | |
| 401 | ✗ | return AVERROR_INVALIDDATA; | |
| 402 | } | ||
| 403 | |||
| 404 | 73 | ret = aic_decode_header(ctx, buf, buf_size); | |
| 405 |
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73 | if (ret < 0) { |
| 406 | 1 | av_log(avctx, AV_LOG_ERROR, "Invalid header\n"); | |
| 407 | 1 | return ret; | |
| 408 | } | ||
| 409 | |||
| 410 |
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72 | if ((ret = ff_thread_get_buffer(avctx, ctx->frame, 0)) < 0) |
| 411 | ✗ | return ret; | |
| 412 | |||
| 413 | 72 | bytestream2_init(&gb, buf + AIC_HDR_SIZE, | |
| 414 | 72 | ctx->num_x_slices * ctx->mb_height * 2); | |
| 415 | |||
| 416 |
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2004 | for (y = 0; y < ctx->mb_height; y++) { |
| 417 |
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5904 | for (x = 0; x < ctx->mb_width; x += ctx->slice_width) { |
| 418 | 3972 | slice_size = bytestream2_get_le16(&gb) * 4; | |
| 419 |
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3972 | if (slice_size + off > buf_size || !slice_size) { |
| 420 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
| 421 | "Incorrect slice size %d at %d.%d\n", slice_size, x, y); | ||
| 422 | ✗ | return AVERROR_INVALIDDATA; | |
| 423 | } | ||
| 424 | |||
| 425 | 3972 | ret = aic_decode_slice(ctx, x, y, buf + off, slice_size); | |
| 426 |
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3972 | if (ret < 0) { |
| 427 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
| 428 | "Error decoding slice at %d.%d\n", x, y); | ||
| 429 | ✗ | return ret; | |
| 430 | } | ||
| 431 | |||
| 432 | 3972 | off += slice_size; | |
| 433 | } | ||
| 434 | } | ||
| 435 | |||
| 436 | 72 | *got_frame = 1; | |
| 437 | |||
| 438 | 72 | return avpkt->size; | |
| 439 | } | ||
| 440 | |||
| 441 | 4 | static av_cold int aic_decode_init(AVCodecContext *avctx) | |
| 442 | { | ||
| 443 | 4 | AICContext *ctx = avctx->priv_data; | |
| 444 | int i; | ||
| 445 | |||
| 446 | 4 | ctx->avctx = avctx; | |
| 447 | |||
| 448 | 4 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; | |
| 449 | |||
| 450 | 4 | ff_idctdsp_init(&ctx->idsp, avctx); | |
| 451 | |||
| 452 |
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260 | for (i = 0; i < 64; i++) |
| 453 | 256 | ctx->quant_matrix[ctx->idsp.idct_permutation[i]] = aic_quant_matrix[i]; | |
| 454 | |||
| 455 | 4 | ctx->mb_width = FFALIGN(avctx->width, 16) >> 4; | |
| 456 | 4 | ctx->mb_height = FFALIGN(avctx->height, 16) >> 4; | |
| 457 | |||
| 458 | 4 | ctx->num_x_slices = (ctx->mb_width + 15) >> 4; | |
| 459 | 4 | ctx->slice_width = 16; | |
| 460 |
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8 | for (i = 1; i < ctx->mb_width; i++) { |
| 461 |
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8 | if (!(ctx->mb_width % i) && (ctx->mb_width / i <= 32)) { |
| 462 | 4 | ctx->slice_width = ctx->mb_width / i; | |
| 463 | 4 | ctx->num_x_slices = i; | |
| 464 | 4 | break; | |
| 465 | } | ||
| 466 | } | ||
| 467 | |||
| 468 | 4 | ctx->slice_data = av_calloc(ctx->slice_width, AIC_BAND_COEFFS * sizeof(*ctx->slice_data)); | |
| 469 |
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4 | if (!ctx->slice_data) { |
| 470 | ✗ | av_log(avctx, AV_LOG_ERROR, "Error allocating slice buffer\n"); | |
| 471 | |||
| 472 | ✗ | return AVERROR(ENOMEM); | |
| 473 | } | ||
| 474 | |||
| 475 |
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20 | for (i = 0; i < NUM_BANDS; i++) |
| 476 | 16 | ctx->data_ptr[i] = ctx->slice_data + ctx->slice_width | |
| 477 | 16 | * aic_band_off[i]; | |
| 478 | |||
| 479 | 4 | return 0; | |
| 480 | } | ||
| 481 | |||
| 482 | 4 | static av_cold int aic_decode_close(AVCodecContext *avctx) | |
| 483 | { | ||
| 484 | 4 | AICContext *ctx = avctx->priv_data; | |
| 485 | |||
| 486 | 4 | av_freep(&ctx->slice_data); | |
| 487 | |||
| 488 | 4 | return 0; | |
| 489 | } | ||
| 490 | |||
| 491 | const FFCodec ff_aic_decoder = { | ||
| 492 | .p.name = "aic", | ||
| 493 | CODEC_LONG_NAME("Apple Intermediate Codec"), | ||
| 494 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 495 | .p.id = AV_CODEC_ID_AIC, | ||
| 496 | .priv_data_size = sizeof(AICContext), | ||
| 497 | .init = aic_decode_init, | ||
| 498 | .close = aic_decode_close, | ||
| 499 | FF_CODEC_DECODE_CB(aic_decode_frame), | ||
| 500 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, | ||
| 501 | }; | ||
| 502 |