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/* |
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* Apple Intermediate Codec decoder |
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* |
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* Copyright (c) 2013 Konstantin Shishkov |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <inttypes.h> |
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#include "avcodec.h" |
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#include "bytestream.h" |
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#include "internal.h" |
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#include "get_bits.h" |
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#include "golomb.h" |
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#include "idctdsp.h" |
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#include "thread.h" |
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#include "unary.h" |
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#define AIC_HDR_SIZE 24 |
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#define AIC_BAND_COEFFS (64 + 32 + 192 + 96) |
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enum AICBands { |
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COEFF_LUMA = 0, |
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COEFF_CHROMA, |
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COEFF_LUMA_EXT, |
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COEFF_CHROMA_EXT, |
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NUM_BANDS |
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}; |
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static const uint8_t aic_num_band_coeffs[NUM_BANDS] = { 64, 32, 192, 96 }; |
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static const uint16_t aic_band_off[NUM_BANDS] = { 0, 64, 96, 288 }; |
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static const uint8_t aic_quant_matrix[64] = { |
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8, 16, 19, 22, 22, 26, 26, 27, |
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16, 16, 22, 22, 26, 27, 27, 29, |
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19, 22, 26, 26, 27, 29, 29, 35, |
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22, 24, 27, 27, 29, 32, 34, 38, |
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26, 27, 29, 29, 32, 35, 38, 46, |
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27, 29, 34, 34, 35, 40, 46, 56, |
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29, 34, 34, 37, 40, 48, 56, 69, |
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34, 37, 38, 40, 48, 58, 69, 83, |
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}; |
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static const uint8_t aic_y_scan[64] = { |
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0, 4, 1, 2, 5, 8, 12, 9, |
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6, 3, 7, 10, 13, 14, 11, 15, |
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47, 43, 46, 45, 42, 39, 35, 38, |
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41, 44, 40, 37, 34, 33, 36, 32, |
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16, 20, 17, 18, 21, 24, 28, 25, |
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22, 19, 23, 26, 29, 30, 27, 31, |
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63, 59, 62, 61, 58, 55, 51, 54, |
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57, 60, 56, 53, 50, 49, 52, 48, |
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}; |
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static const uint8_t aic_y_ext_scan[192] = { |
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64, 72, 65, 66, 73, 80, 88, 81, |
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74, 67, 75, 82, 89, 90, 83, 91, |
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0, 4, 1, 2, 5, 8, 12, 9, |
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6, 3, 7, 10, 13, 14, 11, 15, |
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16, 20, 17, 18, 21, 24, 28, 25, |
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22, 19, 23, 26, 29, 30, 27, 31, |
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155, 147, 154, 153, 146, 139, 131, 138, |
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145, 152, 144, 137, 130, 129, 136, 128, |
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47, 43, 46, 45, 42, 39, 35, 38, |
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41, 44, 40, 37, 34, 33, 36, 32, |
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63, 59, 62, 61, 58, 55, 51, 54, |
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57, 60, 56, 53, 50, 49, 52, 48, |
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96, 104, 97, 98, 105, 112, 120, 113, |
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106, 99, 107, 114, 121, 122, 115, 123, |
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68, 76, 69, 70, 77, 84, 92, 85, |
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78, 71, 79, 86, 93, 94, 87, 95, |
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100, 108, 101, 102, 109, 116, 124, 117, |
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110, 103, 111, 118, 125, 126, 119, 127, |
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187, 179, 186, 185, 178, 171, 163, 170, |
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177, 184, 176, 169, 162, 161, 168, 160, |
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159, 151, 158, 157, 150, 143, 135, 142, |
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149, 156, 148, 141, 134, 133, 140, 132, |
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191, 183, 190, 189, 182, 175, 167, 174, |
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181, 188, 180, 173, 166, 165, 172, 164, |
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}; |
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static const uint8_t aic_c_scan[64] = { |
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0, 4, 1, 2, 5, 8, 12, 9, |
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6, 3, 7, 10, 13, 14, 11, 15, |
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31, 27, 30, 29, 26, 23, 19, 22, |
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25, 28, 24, 21, 18, 17, 20, 16, |
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32, 36, 33, 34, 37, 40, 44, 41, |
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38, 35, 39, 42, 45, 46, 43, 47, |
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63, 59, 62, 61, 58, 55, 51, 54, |
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57, 60, 56, 53, 50, 49, 52, 48, |
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}; |
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static const uint8_t aic_c_ext_scan[192] = { |
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16, 24, 17, 18, 25, 32, 40, 33, |
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26, 19, 27, 34, 41, 42, 35, 43, |
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0, 4, 1, 2, 5, 8, 12, 9, |
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6, 3, 7, 10, 13, 14, 11, 15, |
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20, 28, 21, 22, 29, 36, 44, 37, |
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30, 23, 31, 38, 45, 46, 39, 47, |
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95, 87, 94, 93, 86, 79, 71, 78, |
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85, 92, 84, 77, 70, 69, 76, 68, |
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63, 59, 62, 61, 58, 55, 51, 54, |
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57, 60, 56, 53, 50, 49, 52, 48, |
120 |
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91, 83, 90, 89, 82, 75, 67, 74, |
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81, 88, 80, 73, 66, 65, 72, 64, |
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112, 120, 113, 114, 121, 128, 136, 129, |
123 |
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122, 115, 123, 130, 137, 138, 131, 139, |
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96, 100, 97, 98, 101, 104, 108, 105, |
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102, 99, 103, 106, 109, 110, 107, 111, |
126 |
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116, 124, 117, 118, 125, 132, 140, 133, |
127 |
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126, 119, 127, 134, 141, 142, 135, 143, |
128 |
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191, 183, 190, 189, 182, 175, 167, 174, |
129 |
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181, 188, 180, 173, 166, 165, 172, 164, |
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159, 155, 158, 157, 154, 151, 147, 150, |
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153, 156, 152, 149, 146, 145, 148, 144, |
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187, 179, 186, 185, 178, 171, 163, 170, |
133 |
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177, 184, 176, 169, 162, 161, 168, 160, |
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}; |
135 |
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static const uint8_t * const aic_scan[NUM_BANDS] = { |
137 |
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aic_y_scan, aic_c_scan, aic_y_ext_scan, aic_c_ext_scan |
138 |
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}; |
139 |
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typedef struct AICContext { |
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AVCodecContext *avctx; |
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AVFrame *frame; |
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IDCTDSPContext idsp; |
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ScanTable scantable; |
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146 |
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int num_x_slices; |
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int slice_width; |
148 |
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int mb_width, mb_height; |
149 |
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int quant; |
150 |
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int interlaced; |
151 |
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int16_t *slice_data; |
153 |
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int16_t *data_ptr[NUM_BANDS]; |
154 |
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155 |
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DECLARE_ALIGNED(16, int16_t, block)[64]; |
156 |
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DECLARE_ALIGNED(16, uint8_t, quant_matrix)[64]; |
157 |
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} AICContext; |
158 |
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159 |
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static int aic_decode_header(AICContext *ctx, const uint8_t *src, int size) |
160 |
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{ |
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uint32_t frame_size; |
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int width, height; |
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✗✓ |
72 |
if (src[0] != 1) { |
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av_log(ctx->avctx, AV_LOG_ERROR, "Invalid version %d\n", src[0]); |
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return AVERROR_INVALIDDATA; |
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} |
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✗✓ |
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if (src[1] != AIC_HDR_SIZE - 2) { |
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av_log(ctx->avctx, AV_LOG_ERROR, "Invalid header size %d\n", src[1]); |
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return AVERROR_INVALIDDATA; |
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} |
172 |
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frame_size = AV_RB32(src + 2); |
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width = AV_RB16(src + 6); |
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height = AV_RB16(src + 8); |
175 |
✗✓ |
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if (frame_size > size) { |
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av_log(ctx->avctx, AV_LOG_ERROR, "Frame size should be %"PRIu32" got %d\n", |
177 |
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frame_size, size); |
178 |
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return AVERROR_INVALIDDATA; |
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} |
180 |
✓✗✗✓
|
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if (width != ctx->avctx->width || height != ctx->avctx->height) { |
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av_log(ctx->avctx, AV_LOG_ERROR, |
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"Picture dimension changed: old: %d x %d, new: %d x %d\n", |
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ctx->avctx->width, ctx->avctx->height, width, height); |
184 |
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return AVERROR_INVALIDDATA; |
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} |
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ctx->quant = src[15]; |
187 |
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ctx->interlaced = ((src[16] >> 4) == 3); |
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189 |
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return 0; |
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} |
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#define GET_CODE(val, type, add_bits) \ |
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do { \ |
194 |
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if (type) \ |
195 |
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val = get_ue_golomb(gb); \ |
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else \ |
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val = get_unary(gb, 1, 31); \ |
198 |
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if (add_bits) \ |
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val = (val << add_bits) + get_bits(gb, add_bits); \ |
200 |
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} while (0) |
201 |
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202 |
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15888 |
static int aic_decode_coeffs(GetBitContext *gb, int16_t *dst, |
203 |
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int band, int slice_width, int force_chroma) |
204 |
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{ |
205 |
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int has_skips, coeff_type, coeff_bits, skip_type, skip_bits; |
206 |
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15888 |
const int num_coeffs = aic_num_band_coeffs[band]; |
207 |
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15888 |
const uint8_t *scan = aic_scan[band | force_chroma]; |
208 |
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int mb, idx; |
209 |
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unsigned val; |
210 |
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|
211 |
✗✓ |
15888 |
if (get_bits_left(gb) < 5) |
212 |
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return AVERROR_INVALIDDATA; |
213 |
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214 |
|
15888 |
has_skips = get_bits1(gb); |
215 |
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15888 |
coeff_type = get_bits1(gb); |
216 |
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15888 |
coeff_bits = get_bits(gb, 3); |
217 |
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|
218 |
✓✓ |
15888 |
if (has_skips) { |
219 |
|
13996 |
skip_type = get_bits1(gb); |
220 |
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13996 |
skip_bits = get_bits(gb, 3); |
221 |
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|
222 |
✓✓ |
437433 |
for (mb = 0; mb < slice_width; mb++) { |
223 |
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423437 |
idx = -1; |
224 |
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do { |
225 |
✓✗✓✓
|
5032630 |
GET_CODE(val, skip_type, skip_bits); |
226 |
✗✓ |
5032630 |
if (val >= 0x10000) |
227 |
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return AVERROR_INVALIDDATA; |
228 |
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5032630 |
idx += val + 1; |
229 |
✓✓ |
5032630 |
if (idx >= num_coeffs) |
230 |
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252068 |
break; |
231 |
✓✓✓✓
|
4780562 |
GET_CODE(val, coeff_type, coeff_bits); |
232 |
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4780562 |
val++; |
233 |
✗✓ |
4780562 |
if (val >= 0x10000) |
234 |
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return AVERROR_INVALIDDATA; |
235 |
|
4780562 |
dst[scan[idx]] = val; |
236 |
✓✓ |
4780562 |
} while (idx < num_coeffs - 1); |
237 |
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423437 |
dst += num_coeffs; |
238 |
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} |
239 |
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} else { |
240 |
✓✓ |
58743 |
for (mb = 0; mb < slice_width; mb++) { |
241 |
✓✓ |
10576595 |
for (idx = 0; idx < num_coeffs; idx++) { |
242 |
✓✗✓✓
|
10519744 |
GET_CODE(val, coeff_type, coeff_bits); |
243 |
✗✓ |
10519744 |
if (val >= 0x10000) |
244 |
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return AVERROR_INVALIDDATA; |
245 |
|
10519744 |
dst[scan[idx]] = val; |
246 |
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} |
247 |
|
56851 |
dst += num_coeffs; |
248 |
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} |
249 |
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} |
250 |
|
15888 |
return 0; |
251 |
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} |
252 |
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253 |
|
353232 |
static void recombine_block(int16_t *dst, const uint8_t *scan, |
254 |
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int16_t **base, int16_t **ext) |
255 |
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{ |
256 |
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int i, j; |
257 |
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|
258 |
✓✓ |
1766160 |
for (i = 0; i < 4; i++) { |
259 |
✓✓ |
7064640 |
for (j = 0; j < 4; j++) |
260 |
|
5651712 |
dst[scan[i * 8 + j]] = (*base)[j]; |
261 |
✓✓ |
7064640 |
for (j = 0; j < 4; j++) |
262 |
|
5651712 |
dst[scan[i * 8 + j + 4]] = (*ext)[j]; |
263 |
|
1412928 |
*base += 4; |
264 |
|
1412928 |
*ext += 4; |
265 |
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} |
266 |
✓✓ |
1766160 |
for (; i < 8; i++) { |
267 |
✓✓ |
12716352 |
for (j = 0; j < 8; j++) |
268 |
|
11303424 |
dst[scan[i * 8 + j]] = (*ext)[j]; |
269 |
|
1412928 |
*ext += 8; |
270 |
|
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} |
271 |
|
353232 |
} |
272 |
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|
273 |
|
367200 |
static void recombine_block_il(int16_t *dst, const uint8_t *scan, |
274 |
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int16_t **base, int16_t **ext, |
275 |
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int block_no) |
276 |
|
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{ |
277 |
|
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int i, j; |
278 |
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|
279 |
✓✓ |
367200 |
if (block_no < 2) { |
280 |
✓✓ |
1652400 |
for (i = 0; i < 8; i++) { |
281 |
✓✓ |
7344000 |
for (j = 0; j < 4; j++) |
282 |
|
5875200 |
dst[scan[i * 8 + j]] = (*base)[j]; |
283 |
✓✓ |
7344000 |
for (j = 0; j < 4; j++) |
284 |
|
5875200 |
dst[scan[i * 8 + j + 4]] = (*ext)[j]; |
285 |
|
1468800 |
*base += 4; |
286 |
|
1468800 |
*ext += 4; |
287 |
|
|
} |
288 |
|
|
} else { |
289 |
✓✓ |
11934000 |
for (i = 0; i < 64; i++) |
290 |
|
11750400 |
dst[scan[i]] = (*ext)[i]; |
291 |
|
183600 |
*ext += 64; |
292 |
|
|
} |
293 |
|
367200 |
} |
294 |
|
|
|
295 |
|
720432 |
static void unquant_block(int16_t *block, int q, uint8_t *quant_matrix) |
296 |
|
|
{ |
297 |
|
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int i; |
298 |
|
|
|
299 |
✓✓ |
46828080 |
for (i = 0; i < 64; i++) { |
300 |
|
46107648 |
int val = (uint16_t)block[i]; |
301 |
|
46107648 |
int sign = val & 1; |
302 |
|
|
|
303 |
|
46107648 |
block[i] = (((val >> 1) ^ -sign) * q * quant_matrix[i] >> 4) |
304 |
|
46107648 |
+ sign; |
305 |
|
|
} |
306 |
|
720432 |
} |
307 |
|
|
|
308 |
|
3972 |
static int aic_decode_slice(AICContext *ctx, int mb_x, int mb_y, |
309 |
|
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const uint8_t *src, int src_size) |
310 |
|
|
{ |
311 |
|
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GetBitContext gb; |
312 |
|
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int ret, i, mb, blk; |
313 |
|
3972 |
int slice_width = FFMIN(ctx->slice_width, ctx->mb_width - mb_x); |
314 |
✓✓✓✓
|
3972 |
int last_row = mb_y && mb_y == ctx->mb_height - 1; |
315 |
|
|
int y_pos, c_pos; |
316 |
|
|
uint8_t *Y, *C[2]; |
317 |
|
|
uint8_t *dst; |
318 |
|
3972 |
int16_t *base_y = ctx->data_ptr[COEFF_LUMA]; |
319 |
|
3972 |
int16_t *base_c = ctx->data_ptr[COEFF_CHROMA]; |
320 |
|
3972 |
int16_t *ext_y = ctx->data_ptr[COEFF_LUMA_EXT]; |
321 |
|
3972 |
int16_t *ext_c = ctx->data_ptr[COEFF_CHROMA_EXT]; |
322 |
|
3972 |
const int ystride = ctx->frame->linesize[0]; |
323 |
|
|
|
324 |
✓✓ |
3972 |
if (last_row) { |
325 |
|
102 |
y_pos = (ctx->avctx->height - 16); |
326 |
|
102 |
c_pos = ((ctx->avctx->height+1)/2 - 8); |
327 |
|
|
} else { |
328 |
|
3870 |
y_pos = mb_y * 16; |
329 |
|
3870 |
c_pos = mb_y * 8; |
330 |
|
|
} |
331 |
|
|
|
332 |
|
3972 |
Y = ctx->frame->data[0] + mb_x * 16 + y_pos * ystride; |
333 |
✓✓ |
11916 |
for (i = 0; i < 2; i++) |
334 |
|
7944 |
C[i] = ctx->frame->data[i + 1] + mb_x * 8 |
335 |
|
7944 |
+ c_pos * ctx->frame->linesize[i + 1]; |
336 |
|
3972 |
init_get_bits(&gb, src, src_size * 8); |
337 |
|
|
|
338 |
|
3972 |
memset(ctx->slice_data, 0, |
339 |
|
|
sizeof(*ctx->slice_data) * slice_width * AIC_BAND_COEFFS); |
340 |
✓✓ |
19860 |
for (i = 0; i < NUM_BANDS; i++) |
341 |
✗✓ |
15888 |
if ((ret = aic_decode_coeffs(&gb, ctx->data_ptr[i], |
342 |
|
|
i, slice_width, |
343 |
|
15888 |
!ctx->interlaced)) < 0) |
344 |
|
|
return ret; |
345 |
|
|
|
346 |
✓✓ |
124044 |
for (mb = 0; mb < slice_width; mb++) { |
347 |
✓✓ |
600360 |
for (blk = 0; blk < 4; blk++) { |
348 |
✓✓ |
480288 |
if (!ctx->interlaced) |
349 |
|
113088 |
recombine_block(ctx->block, ctx->scantable.permutated, |
350 |
|
|
&base_y, &ext_y); |
351 |
|
|
else |
352 |
|
367200 |
recombine_block_il(ctx->block, ctx->scantable.permutated, |
353 |
|
|
&base_y, &ext_y, blk); |
354 |
|
480288 |
unquant_block(ctx->block, ctx->quant, ctx->quant_matrix); |
355 |
|
480288 |
ctx->idsp.idct(ctx->block); |
356 |
|
|
|
357 |
✓✓ |
480288 |
if (!ctx->interlaced) { |
358 |
|
113088 |
dst = Y + (blk >> 1) * 8 * ystride + (blk & 1) * 8; |
359 |
|
113088 |
ctx->idsp.put_signed_pixels_clamped(ctx->block, dst, ystride); |
360 |
|
|
} else { |
361 |
|
367200 |
dst = Y + (blk & 1) * 8 + (blk >> 1) * ystride; |
362 |
|
367200 |
ctx->idsp.put_signed_pixels_clamped(ctx->block, dst, |
363 |
|
367200 |
ystride * 2); |
364 |
|
|
} |
365 |
|
|
} |
366 |
|
120072 |
Y += 16; |
367 |
|
|
|
368 |
✓✓ |
360216 |
for (blk = 0; blk < 2; blk++) { |
369 |
|
240144 |
recombine_block(ctx->block, ctx->scantable.permutated, |
370 |
|
|
&base_c, &ext_c); |
371 |
|
240144 |
unquant_block(ctx->block, ctx->quant, ctx->quant_matrix); |
372 |
|
240144 |
ctx->idsp.idct(ctx->block); |
373 |
|
240144 |
ctx->idsp.put_signed_pixels_clamped(ctx->block, C[blk], |
374 |
|
240144 |
ctx->frame->linesize[blk + 1]); |
375 |
|
240144 |
C[blk] += 8; |
376 |
|
|
} |
377 |
|
|
} |
378 |
|
|
|
379 |
|
3972 |
return 0; |
380 |
|
|
} |
381 |
|
|
|
382 |
|
72 |
static int aic_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
383 |
|
|
AVPacket *avpkt) |
384 |
|
|
{ |
385 |
|
72 |
AICContext *ctx = avctx->priv_data; |
386 |
|
72 |
const uint8_t *buf = avpkt->data; |
387 |
|
72 |
int buf_size = avpkt->size; |
388 |
|
|
GetByteContext gb; |
389 |
|
|
uint32_t off; |
390 |
|
|
int x, y, ret; |
391 |
|
|
int slice_size; |
392 |
|
72 |
ThreadFrame frame = { .f = data }; |
393 |
|
|
|
394 |
|
72 |
ctx->frame = data; |
395 |
|
72 |
ctx->frame->pict_type = AV_PICTURE_TYPE_I; |
396 |
|
72 |
ctx->frame->key_frame = 1; |
397 |
|
|
|
398 |
|
72 |
off = FFALIGN(AIC_HDR_SIZE + ctx->num_x_slices * ctx->mb_height * 2, 4); |
399 |
|
|
|
400 |
✗✓ |
72 |
if (buf_size < off) { |
401 |
|
|
av_log(avctx, AV_LOG_ERROR, "Too small frame\n"); |
402 |
|
|
return AVERROR_INVALIDDATA; |
403 |
|
|
} |
404 |
|
|
|
405 |
|
72 |
ret = aic_decode_header(ctx, buf, buf_size); |
406 |
✗✓ |
72 |
if (ret < 0) { |
407 |
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid header\n"); |
408 |
|
|
return ret; |
409 |
|
|
} |
410 |
|
|
|
411 |
✗✓ |
72 |
if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) |
412 |
|
|
return ret; |
413 |
|
|
|
414 |
|
72 |
bytestream2_init(&gb, buf + AIC_HDR_SIZE, |
415 |
|
72 |
ctx->num_x_slices * ctx->mb_height * 2); |
416 |
|
|
|
417 |
✓✓ |
2004 |
for (y = 0; y < ctx->mb_height; y++) { |
418 |
✓✓ |
5904 |
for (x = 0; x < ctx->mb_width; x += ctx->slice_width) { |
419 |
|
3972 |
slice_size = bytestream2_get_le16(&gb) * 4; |
420 |
✓✗✗✓
|
3972 |
if (slice_size + off > buf_size || !slice_size) { |
421 |
|
|
av_log(avctx, AV_LOG_ERROR, |
422 |
|
|
"Incorrect slice size %d at %d.%d\n", slice_size, x, y); |
423 |
|
|
return AVERROR_INVALIDDATA; |
424 |
|
|
} |
425 |
|
|
|
426 |
|
3972 |
ret = aic_decode_slice(ctx, x, y, buf + off, slice_size); |
427 |
✗✓ |
3972 |
if (ret < 0) { |
428 |
|
|
av_log(avctx, AV_LOG_ERROR, |
429 |
|
|
"Error decoding slice at %d.%d\n", x, y); |
430 |
|
|
return ret; |
431 |
|
|
} |
432 |
|
|
|
433 |
|
3972 |
off += slice_size; |
434 |
|
|
} |
435 |
|
|
} |
436 |
|
|
|
437 |
|
72 |
*got_frame = 1; |
438 |
|
|
|
439 |
|
72 |
return avpkt->size; |
440 |
|
|
} |
441 |
|
|
|
442 |
|
4 |
static av_cold int aic_decode_init(AVCodecContext *avctx) |
443 |
|
|
{ |
444 |
|
4 |
AICContext *ctx = avctx->priv_data; |
445 |
|
|
int i; |
446 |
|
|
uint8_t scan[64]; |
447 |
|
|
|
448 |
|
4 |
ctx->avctx = avctx; |
449 |
|
|
|
450 |
|
4 |
avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
451 |
|
|
|
452 |
|
4 |
ff_idctdsp_init(&ctx->idsp, avctx); |
453 |
|
|
|
454 |
✓✓ |
260 |
for (i = 0; i < 64; i++) |
455 |
|
256 |
scan[i] = i; |
456 |
|
4 |
ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable, scan); |
457 |
✓✓ |
260 |
for (i = 0; i < 64; i++) |
458 |
|
256 |
ctx->quant_matrix[ctx->idsp.idct_permutation[i]] = aic_quant_matrix[i]; |
459 |
|
|
|
460 |
|
4 |
ctx->mb_width = FFALIGN(avctx->width, 16) >> 4; |
461 |
|
4 |
ctx->mb_height = FFALIGN(avctx->height, 16) >> 4; |
462 |
|
|
|
463 |
|
4 |
ctx->num_x_slices = (ctx->mb_width + 15) >> 4; |
464 |
|
4 |
ctx->slice_width = 16; |
465 |
✓✗ |
8 |
for (i = 1; i < ctx->mb_width; i++) { |
466 |
✓✗✓✓
|
8 |
if (!(ctx->mb_width % i) && (ctx->mb_width / i <= 32)) { |
467 |
|
4 |
ctx->slice_width = ctx->mb_width / i; |
468 |
|
4 |
ctx->num_x_slices = i; |
469 |
|
4 |
break; |
470 |
|
|
} |
471 |
|
|
} |
472 |
|
|
|
473 |
|
4 |
ctx->slice_data = av_malloc_array(ctx->slice_width, AIC_BAND_COEFFS |
474 |
|
|
* sizeof(*ctx->slice_data)); |
475 |
✗✓ |
4 |
if (!ctx->slice_data) { |
476 |
|
|
av_log(avctx, AV_LOG_ERROR, "Error allocating slice buffer\n"); |
477 |
|
|
|
478 |
|
|
return AVERROR(ENOMEM); |
479 |
|
|
} |
480 |
|
|
|
481 |
✓✓ |
20 |
for (i = 0; i < NUM_BANDS; i++) |
482 |
|
16 |
ctx->data_ptr[i] = ctx->slice_data + ctx->slice_width |
483 |
|
16 |
* aic_band_off[i]; |
484 |
|
|
|
485 |
|
4 |
return 0; |
486 |
|
|
} |
487 |
|
|
|
488 |
|
4 |
static av_cold int aic_decode_close(AVCodecContext *avctx) |
489 |
|
|
{ |
490 |
|
4 |
AICContext *ctx = avctx->priv_data; |
491 |
|
|
|
492 |
|
4 |
av_freep(&ctx->slice_data); |
493 |
|
|
|
494 |
|
4 |
return 0; |
495 |
|
|
} |
496 |
|
|
|
497 |
|
|
AVCodec ff_aic_decoder = { |
498 |
|
|
.name = "aic", |
499 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("Apple Intermediate Codec"), |
500 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
501 |
|
|
.id = AV_CODEC_ID_AIC, |
502 |
|
|
.priv_data_size = sizeof(AICContext), |
503 |
|
|
.init = aic_decode_init, |
504 |
|
|
.close = aic_decode_close, |
505 |
|
|
.decode = aic_decode_frame, |
506 |
|
|
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, |
507 |
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, |
508 |
|
|
}; |