LCOV - code coverage report
Current view: top level - libavcodec - aic.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 164 188 87.2 %
Date: 2017-12-11 20:48:03 Functions: 9 9 100.0 %

          Line data    Source code
       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 "thread.h"
      32             : #include "unary.h"
      33             : 
      34             : #define AIC_HDR_SIZE    24
      35             : #define AIC_BAND_COEFFS (64 + 32 + 192 + 96)
      36             : 
      37             : enum AICBands {
      38             :     COEFF_LUMA = 0,
      39             :     COEFF_CHROMA,
      40             :     COEFF_LUMA_EXT,
      41             :     COEFF_CHROMA_EXT,
      42             :     NUM_BANDS
      43             : };
      44             : 
      45             : static const int aic_num_band_coeffs[NUM_BANDS] = { 64, 32, 192, 96 };
      46             : 
      47             : static const int aic_band_off[NUM_BANDS] = { 0, 64, 96, 288 };
      48             : 
      49             : static const uint8_t aic_quant_matrix[64] = {
      50             :      8, 16, 19, 22, 22, 26, 26, 27,
      51             :     16, 16, 22, 22, 26, 27, 27, 29,
      52             :     19, 22, 26, 26, 27, 29, 29, 35,
      53             :     22, 24, 27, 27, 29, 32, 34, 38,
      54             :     26, 27, 29, 29, 32, 35, 38, 46,
      55             :     27, 29, 34, 34, 35, 40, 46, 56,
      56             :     29, 34, 34, 37, 40, 48, 56, 69,
      57             :     34, 37, 38, 40, 48, 58, 69, 83,
      58             : };
      59             : 
      60             : static const uint8_t aic_y_scan[64] = {
      61             :      0,  4,  1,  2,  5,  8, 12,  9,
      62             :      6,  3,  7, 10, 13, 14, 11, 15,
      63             :     47, 43, 46, 45, 42, 39, 35, 38,
      64             :     41, 44, 40, 37, 34, 33, 36, 32,
      65             :     16, 20, 17, 18, 21, 24, 28, 25,
      66             :     22, 19, 23, 26, 29, 30, 27, 31,
      67             :     63, 59, 62, 61, 58, 55, 51, 54,
      68             :     57, 60, 56, 53, 50, 49, 52, 48,
      69             : };
      70             : 
      71             : static const uint8_t aic_y_ext_scan[192] = {
      72             :      64,  72,  65,  66,  73,  80,  88,  81,
      73             :      74,  67,  75,  82,  89,  90,  83,  91,
      74             :       0,   4,   1,   2,   5,   8,  12,   9,
      75             :       6,   3,   7,  10,  13,  14,  11,  15,
      76             :      16,  20,  17,  18,  21,  24,  28,  25,
      77             :      22,  19,  23,  26,  29,  30,  27,  31,
      78             :     155, 147, 154, 153, 146, 139, 131, 138,
      79             :     145, 152, 144, 137, 130, 129, 136, 128,
      80             :      47,  43,  46,  45,  42,  39,  35,  38,
      81             :      41,  44,  40,  37,  34,  33,  36,  32,
      82             :      63,  59,  62,  61,  58,  55,  51,  54,
      83             :      57,  60,  56,  53,  50,  49,  52,  48,
      84             :      96, 104,  97,  98, 105, 112, 120, 113,
      85             :     106,  99, 107, 114, 121, 122, 115, 123,
      86             :      68,  76,  69,  70,  77,  84,  92,  85,
      87             :      78,  71,  79,  86,  93,  94,  87,  95,
      88             :     100, 108, 101, 102, 109, 116, 124, 117,
      89             :     110, 103, 111, 118, 125, 126, 119, 127,
      90             :     187, 179, 186, 185, 178, 171, 163, 170,
      91             :     177, 184, 176, 169, 162, 161, 168, 160,
      92             :     159, 151, 158, 157, 150, 143, 135, 142,
      93             :     149, 156, 148, 141, 134, 133, 140, 132,
      94             :     191, 183, 190, 189, 182, 175, 167, 174,
      95             :     181, 188, 180, 173, 166, 165, 172, 164,
      96             : };
      97             : 
      98             : static const uint8_t aic_c_scan[64] = {
      99             :      0,  4,  1,  2,  5,  8, 12,  9,
     100             :      6,  3,  7, 10, 13, 14, 11, 15,
     101             :     31, 27, 30, 29, 26, 23, 19, 22,
     102             :     25, 28, 24, 21, 18, 17, 20, 16,
     103             :     32, 36, 33, 34, 37, 40, 44, 41,
     104             :     38, 35, 39, 42, 45, 46, 43, 47,
     105             :     63, 59, 62, 61, 58, 55, 51, 54,
     106             :     57, 60, 56, 53, 50, 49, 52, 48,
     107             : };
     108             : 
     109             : static const uint8_t aic_c_ext_scan[192] = {
     110             :      16,  24,  17,  18,  25,  32,  40,  33,
     111             :      26,  19,  27,  34,  41,  42,  35,  43,
     112             :       0,   4,   1,   2,   5,   8,  12,   9,
     113             :       6,   3,   7,  10,  13,  14,  11,  15,
     114             :      20,  28,  21,  22,  29,  36,  44,  37,
     115             :      30,  23,  31,  38,  45,  46,  39,  47,
     116             :      95,  87,  94,  93,  86,  79,  71,  78,
     117             :      85,  92,  84,  77,  70,  69,  76,  68,
     118             :      63,  59,  62,  61,  58,  55,  51,  54,
     119             :      57,  60,  56,  53,  50,  49,  52,  48,
     120             :      91,  83,  90,  89,  82,  75,  67,  74,
     121             :      81,  88,  80,  73,  66,  65,  72,  64,
     122             :     112, 120, 113, 114, 121, 128, 136, 129,
     123             :     122, 115, 123, 130, 137, 138, 131, 139,
     124             :      96, 100,  97,  98, 101, 104, 108, 105,
     125             :     102,  99, 103, 106, 109, 110, 107, 111,
     126             :     116, 124, 117, 118, 125, 132, 140, 133,
     127             :     126, 119, 127, 134, 141, 142, 135, 143,
     128             :     191, 183, 190, 189, 182, 175, 167, 174,
     129             :     181, 188, 180, 173, 166, 165, 172, 164,
     130             :     159, 155, 158, 157, 154, 151, 147, 150,
     131             :     153, 156, 152, 149, 146, 145, 148, 144,
     132             :     187, 179, 186, 185, 178, 171, 163, 170,
     133             :     177, 184, 176, 169, 162, 161, 168, 160,
     134             : };
     135             : 
     136             : static const uint8_t * const aic_scan[NUM_BANDS] = {
     137             :     aic_y_scan, aic_c_scan, aic_y_ext_scan, aic_c_ext_scan
     138             : };
     139             : 
     140             : typedef struct AICContext {
     141             :     AVCodecContext *avctx;
     142             :     AVFrame        *frame;
     143             :     IDCTDSPContext idsp;
     144             :     ScanTable      scantable;
     145             : 
     146             :     int            num_x_slices;
     147             :     int            slice_width;
     148             :     int            mb_width, mb_height;
     149             :     int            quant;
     150             :     int            interlaced;
     151             : 
     152             :     int16_t        *slice_data;
     153             :     int16_t        *data_ptr[NUM_BANDS];
     154             : 
     155             :     DECLARE_ALIGNED(16, int16_t, block)[64];
     156             :     DECLARE_ALIGNED(16, uint8_t, quant_matrix)[64];
     157             : } AICContext;
     158             : 
     159          72 : static int aic_decode_header(AICContext *ctx, const uint8_t *src, int size)
     160             : {
     161             :     uint32_t frame_size;
     162             :     int width, height;
     163             : 
     164          72 :     if (src[0] != 1) {
     165           0 :         av_log(ctx->avctx, AV_LOG_ERROR, "Invalid version %d\n", src[0]);
     166           0 :         return AVERROR_INVALIDDATA;
     167             :     }
     168          72 :     if (src[1] != AIC_HDR_SIZE - 2) {
     169           0 :         av_log(ctx->avctx, AV_LOG_ERROR, "Invalid header size %d\n", src[1]);
     170           0 :         return AVERROR_INVALIDDATA;
     171             :     }
     172          72 :     frame_size = AV_RB32(src + 2);
     173          72 :     width      = AV_RB16(src + 6);
     174          72 :     height     = AV_RB16(src + 8);
     175          72 :     if (frame_size > size) {
     176           0 :         av_log(ctx->avctx, AV_LOG_ERROR, "Frame size should be %"PRIu32" got %d\n",
     177             :                frame_size, size);
     178           0 :         return AVERROR_INVALIDDATA;
     179             :     }
     180          72 :     if (width != ctx->avctx->width || height != ctx->avctx->height) {
     181           0 :         av_log(ctx->avctx, AV_LOG_ERROR,
     182             :                "Picture dimension changed: old: %d x %d, new: %d x %d\n",
     183           0 :                ctx->avctx->width, ctx->avctx->height, width, height);
     184           0 :         return AVERROR_INVALIDDATA;
     185             :     }
     186          72 :     ctx->quant      = src[15];
     187          72 :     ctx->interlaced = ((src[16] >> 4) == 3);
     188             : 
     189          72 :     return 0;
     190             : }
     191             : 
     192             : #define GET_CODE(val, type, add_bits)                         \
     193             :     do {                                                      \
     194             :         if (type)                                             \
     195             :             val = get_ue_golomb(gb);                          \
     196             :         else                                                  \
     197             :             val = get_unary(gb, 1, 31);                       \
     198             :         if (add_bits)                                         \
     199             :             val = (val << add_bits) + get_bits(gb, add_bits); \
     200             :     } while (0)
     201             : 
     202       15888 : static int aic_decode_coeffs(GetBitContext *gb, int16_t *dst,
     203             :                              int band, int slice_width, int force_chroma)
     204             : {
     205             :     int has_skips, coeff_type, coeff_bits, skip_type, skip_bits;
     206       15888 :     const int num_coeffs = aic_num_band_coeffs[band];
     207       15888 :     const uint8_t *scan = aic_scan[band | force_chroma];
     208             :     int mb, idx;
     209             :     unsigned val;
     210             : 
     211       15888 :     has_skips  = get_bits1(gb);
     212       15888 :     coeff_type = get_bits1(gb);
     213       15888 :     coeff_bits = get_bits(gb, 3);
     214             : 
     215       15888 :     if (has_skips) {
     216       13996 :         skip_type = get_bits1(gb);
     217       13996 :         skip_bits = get_bits(gb, 3);
     218             : 
     219      437433 :         for (mb = 0; mb < slice_width; mb++) {
     220      423437 :             idx = -1;
     221             :             do {
     222     5032630 :                 GET_CODE(val, skip_type, skip_bits);
     223     5032630 :                 if (val >= 0x10000)
     224           0 :                     return AVERROR_INVALIDDATA;
     225     5032630 :                 idx += val + 1;
     226     5032630 :                 if (idx >= num_coeffs)
     227      252068 :                     break;
     228     4780562 :                 GET_CODE(val, coeff_type, coeff_bits);
     229     4780562 :                 val++;
     230     4780562 :                 if (val >= 0x10000)
     231           0 :                     return AVERROR_INVALIDDATA;
     232     4780562 :                 dst[scan[idx]] = val;
     233     4780562 :             } while (idx < num_coeffs - 1);
     234      423437 :             dst += num_coeffs;
     235             :         }
     236             :     } else {
     237       58743 :         for (mb = 0; mb < slice_width; mb++) {
     238    10576595 :             for (idx = 0; idx < num_coeffs; idx++) {
     239    10519744 :                 GET_CODE(val, coeff_type, coeff_bits);
     240    10519744 :                 if (val >= 0x10000)
     241           0 :                     return AVERROR_INVALIDDATA;
     242    10519744 :                 dst[scan[idx]] = val;
     243             :             }
     244       56851 :             dst += num_coeffs;
     245             :         }
     246             :     }
     247       15888 :     return 0;
     248             : }
     249             : 
     250      353232 : static void recombine_block(int16_t *dst, const uint8_t *scan,
     251             :                             int16_t **base, int16_t **ext)
     252             : {
     253             :     int i, j;
     254             : 
     255     1766160 :     for (i = 0; i < 4; i++) {
     256     7064640 :         for (j = 0; j < 4; j++)
     257     5651712 :             dst[scan[i * 8 + j]]     = (*base)[j];
     258     7064640 :         for (j = 0; j < 4; j++)
     259     5651712 :             dst[scan[i * 8 + j + 4]] = (*ext)[j];
     260     1412928 :         *base += 4;
     261     1412928 :         *ext  += 4;
     262             :     }
     263     1766160 :     for (; i < 8; i++) {
     264    12716352 :         for (j = 0; j < 8; j++)
     265    11303424 :             dst[scan[i * 8 + j]] = (*ext)[j];
     266     1412928 :         *ext  += 8;
     267             :     }
     268      353232 : }
     269             : 
     270      367200 : static void recombine_block_il(int16_t *dst, const uint8_t *scan,
     271             :                                int16_t **base, int16_t **ext,
     272             :                                int block_no)
     273             : {
     274             :     int i, j;
     275             : 
     276      367200 :     if (block_no < 2) {
     277     1652400 :         for (i = 0; i < 8; i++) {
     278     7344000 :             for (j = 0; j < 4; j++)
     279     5875200 :                 dst[scan[i * 8 + j]]     = (*base)[j];
     280     7344000 :             for (j = 0; j < 4; j++)
     281     5875200 :                 dst[scan[i * 8 + j + 4]] = (*ext)[j];
     282     1468800 :             *base += 4;
     283     1468800 :             *ext  += 4;
     284             :         }
     285             :     } else {
     286    11934000 :         for (i = 0; i < 64; i++)
     287    11750400 :             dst[scan[i]] = (*ext)[i];
     288      183600 :         *ext += 64;
     289             :     }
     290      367200 : }
     291             : 
     292      720432 : static void unquant_block(int16_t *block, int q, uint8_t *quant_matrix)
     293             : {
     294             :     int i;
     295             : 
     296    46828080 :     for (i = 0; i < 64; i++) {
     297    46107648 :         int val  = (uint16_t)block[i];
     298    46107648 :         int sign = val & 1;
     299             : 
     300   138322944 :         block[i] = (((val >> 1) ^ -sign) * q * quant_matrix[i] >> 4)
     301    92215296 :                    + sign;
     302             :     }
     303      720432 : }
     304             : 
     305        3972 : static int aic_decode_slice(AICContext *ctx, int mb_x, int mb_y,
     306             :                             const uint8_t *src, int src_size)
     307             : {
     308             :     GetBitContext gb;
     309             :     int ret, i, mb, blk;
     310        3972 :     int slice_width = FFMIN(ctx->slice_width, ctx->mb_width - mb_x);
     311             :     uint8_t *Y, *C[2];
     312             :     uint8_t *dst;
     313        3972 :     int16_t *base_y = ctx->data_ptr[COEFF_LUMA];
     314        3972 :     int16_t *base_c = ctx->data_ptr[COEFF_CHROMA];
     315        3972 :     int16_t *ext_y  = ctx->data_ptr[COEFF_LUMA_EXT];
     316        3972 :     int16_t *ext_c  = ctx->data_ptr[COEFF_CHROMA_EXT];
     317        3972 :     const int ystride = ctx->frame->linesize[0];
     318             : 
     319        3972 :     Y = ctx->frame->data[0] + mb_x * 16 + mb_y * 16 * ystride;
     320       11916 :     for (i = 0; i < 2; i++)
     321       15888 :         C[i] = ctx->frame->data[i + 1] + mb_x * 8
     322        7944 :                + mb_y * 8 * ctx->frame->linesize[i + 1];
     323        3972 :     init_get_bits(&gb, src, src_size * 8);
     324             : 
     325        3972 :     memset(ctx->slice_data, 0,
     326             :            sizeof(*ctx->slice_data) * slice_width * AIC_BAND_COEFFS);
     327       19860 :     for (i = 0; i < NUM_BANDS; i++)
     328       15888 :         if ((ret = aic_decode_coeffs(&gb, ctx->data_ptr[i],
     329             :                                      i, slice_width,
     330       15888 :                                      !ctx->interlaced)) < 0)
     331           0 :             return ret;
     332             : 
     333      124044 :     for (mb = 0; mb < slice_width; mb++) {
     334      600360 :         for (blk = 0; blk < 4; blk++) {
     335      480288 :             if (!ctx->interlaced)
     336      113088 :                 recombine_block(ctx->block, ctx->scantable.permutated,
     337             :                                 &base_y, &ext_y);
     338             :             else
     339      367200 :                 recombine_block_il(ctx->block, ctx->scantable.permutated,
     340             :                                    &base_y, &ext_y, blk);
     341      480288 :             unquant_block(ctx->block, ctx->quant, ctx->quant_matrix);
     342      480288 :             ctx->idsp.idct(ctx->block);
     343             : 
     344      480288 :             if (!ctx->interlaced) {
     345      113088 :                 dst = Y + (blk >> 1) * 8 * ystride + (blk & 1) * 8;
     346      113088 :                 ctx->idsp.put_signed_pixels_clamped(ctx->block, dst, ystride);
     347             :             } else {
     348      367200 :                 dst = Y + (blk & 1) * 8 + (blk >> 1) * ystride;
     349      734400 :                 ctx->idsp.put_signed_pixels_clamped(ctx->block, dst,
     350      367200 :                                                     ystride * 2);
     351             :             }
     352             :         }
     353      120072 :         Y += 16;
     354             : 
     355      360216 :         for (blk = 0; blk < 2; blk++) {
     356      240144 :             recombine_block(ctx->block, ctx->scantable.permutated,
     357             :                             &base_c, &ext_c);
     358      240144 :             unquant_block(ctx->block, ctx->quant, ctx->quant_matrix);
     359      240144 :             ctx->idsp.idct(ctx->block);
     360      480288 :             ctx->idsp.put_signed_pixels_clamped(ctx->block, C[blk],
     361      240144 :                                                 ctx->frame->linesize[blk + 1]);
     362      240144 :             C[blk] += 8;
     363             :         }
     364             :     }
     365             : 
     366        3972 :     return 0;
     367             : }
     368             : 
     369          72 : static int aic_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     370             :                             AVPacket *avpkt)
     371             : {
     372          72 :     AICContext *ctx    = avctx->priv_data;
     373          72 :     const uint8_t *buf = avpkt->data;
     374          72 :     int buf_size       = avpkt->size;
     375             :     GetByteContext gb;
     376             :     uint32_t off;
     377             :     int x, y, ret;
     378             :     int slice_size;
     379          72 :     ThreadFrame frame = { .f = data };
     380             : 
     381          72 :     ctx->frame            = data;
     382          72 :     ctx->frame->pict_type = AV_PICTURE_TYPE_I;
     383          72 :     ctx->frame->key_frame = 1;
     384             : 
     385          72 :     off = FFALIGN(AIC_HDR_SIZE + ctx->num_x_slices * ctx->mb_height * 2, 4);
     386             : 
     387          72 :     if (buf_size < off) {
     388           0 :         av_log(avctx, AV_LOG_ERROR, "Too small frame\n");
     389           0 :         return AVERROR_INVALIDDATA;
     390             :     }
     391             : 
     392          72 :     ret = aic_decode_header(ctx, buf, buf_size);
     393          72 :     if (ret < 0) {
     394           0 :         av_log(avctx, AV_LOG_ERROR, "Invalid header\n");
     395           0 :         return ret;
     396             :     }
     397             : 
     398          72 :     if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
     399           0 :         return ret;
     400             : 
     401          72 :     bytestream2_init(&gb, buf + AIC_HDR_SIZE,
     402          72 :                      ctx->num_x_slices * ctx->mb_height * 2);
     403             : 
     404        2004 :     for (y = 0; y < ctx->mb_height; y++) {
     405        5904 :         for (x = 0; x < ctx->mb_width; x += ctx->slice_width) {
     406        3972 :             slice_size = bytestream2_get_le16(&gb) * 4;
     407        3972 :             if (slice_size + off > buf_size || !slice_size) {
     408           0 :                 av_log(avctx, AV_LOG_ERROR,
     409             :                        "Incorrect slice size %d at %d.%d\n", slice_size, x, y);
     410           0 :                 return AVERROR_INVALIDDATA;
     411             :             }
     412             : 
     413        3972 :             ret = aic_decode_slice(ctx, x, y, buf + off, slice_size);
     414        3972 :             if (ret < 0) {
     415           0 :                 av_log(avctx, AV_LOG_ERROR,
     416             :                        "Error decoding slice at %d.%d\n", x, y);
     417           0 :                 return ret;
     418             :             }
     419             : 
     420        3972 :             off += slice_size;
     421             :         }
     422             :     }
     423             : 
     424          72 :     *got_frame = 1;
     425             : 
     426          72 :     return avpkt->size;
     427             : }
     428             : 
     429           4 : static av_cold int aic_decode_init(AVCodecContext *avctx)
     430             : {
     431           4 :     AICContext *ctx = avctx->priv_data;
     432             :     int i;
     433             :     uint8_t scan[64];
     434             : 
     435           4 :     ctx->avctx = avctx;
     436             : 
     437           4 :     avctx->pix_fmt = AV_PIX_FMT_YUV420P;
     438             : 
     439           4 :     ff_idctdsp_init(&ctx->idsp, avctx);
     440             : 
     441         260 :     for (i = 0; i < 64; i++)
     442         256 :         scan[i] = i;
     443           4 :     ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable, scan);
     444         260 :     for (i = 0; i < 64; i++)
     445         256 :         ctx->quant_matrix[ctx->idsp.idct_permutation[i]] = aic_quant_matrix[i];
     446             : 
     447           4 :     ctx->mb_width  = FFALIGN(avctx->width,  16) >> 4;
     448           4 :     ctx->mb_height = FFALIGN(avctx->height, 16) >> 4;
     449             : 
     450           4 :     ctx->num_x_slices = (ctx->mb_width + 15) >> 4;
     451           4 :     ctx->slice_width  = 16;
     452           8 :     for (i = 1; i < ctx->mb_width; i++) {
     453           8 :         if (!(ctx->mb_width % i) && (ctx->mb_width / i <= 32)) {
     454           4 :             ctx->slice_width  = ctx->mb_width / i;
     455           4 :             ctx->num_x_slices = i;
     456           4 :             break;
     457             :         }
     458             :     }
     459             : 
     460           4 :     ctx->slice_data = av_malloc_array(ctx->slice_width, AIC_BAND_COEFFS
     461             :                                 * sizeof(*ctx->slice_data));
     462           4 :     if (!ctx->slice_data) {
     463           0 :         av_log(avctx, AV_LOG_ERROR, "Error allocating slice buffer\n");
     464             : 
     465           0 :         return AVERROR(ENOMEM);
     466             :     }
     467             : 
     468          20 :     for (i = 0; i < NUM_BANDS; i++)
     469          32 :         ctx->data_ptr[i] = ctx->slice_data + ctx->slice_width
     470          16 :                                              * aic_band_off[i];
     471             : 
     472           4 :     return 0;
     473             : }
     474             : 
     475           4 : static av_cold int aic_decode_close(AVCodecContext *avctx)
     476             : {
     477           4 :     AICContext *ctx = avctx->priv_data;
     478             : 
     479           4 :     av_freep(&ctx->slice_data);
     480             : 
     481           4 :     return 0;
     482             : }
     483             : 
     484             : AVCodec ff_aic_decoder = {
     485             :     .name           = "aic",
     486             :     .long_name      = NULL_IF_CONFIG_SMALL("Apple Intermediate Codec"),
     487             :     .type           = AVMEDIA_TYPE_VIDEO,
     488             :     .id             = AV_CODEC_ID_AIC,
     489             :     .priv_data_size = sizeof(AICContext),
     490             :     .init           = aic_decode_init,
     491             :     .close          = aic_decode_close,
     492             :     .decode         = aic_decode_frame,
     493             :     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
     494             :     .init_thread_copy = ONLY_IF_THREADS_ENABLED(aic_decode_init),
     495             :     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,
     496             : };

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