LCOV - code coverage report
Current view: top level - libavcodec - hapdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 226 274 82.5 %
Date: 2017-12-17 23:02:56 Functions: 11 11 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Vidvox Hap decoder
       3             :  * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
       4             :  * Copyright (C) 2015 Tom Butterworth <bangnoise@gmail.com>
       5             :  *
       6             :  * HapQA and HAPAlphaOnly added by Jokyo Images
       7             :  *
       8             :  * This file is part of FFmpeg.
       9             :  *
      10             :  * FFmpeg is free software; you can redistribute it and/or
      11             :  * modify it under the terms of the GNU Lesser General Public
      12             :  * License as published by the Free Software Foundation; either
      13             :  * version 2.1 of the License, or (at your option) any later version.
      14             :  *
      15             :  * FFmpeg is distributed in the hope that it will be useful,
      16             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      17             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      18             :  * Lesser General Public License for more details.
      19             :  *
      20             :  * You should have received a copy of the GNU Lesser General Public
      21             :  * License along with FFmpeg; if not, write to the Free Software
      22             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      23             :  */
      24             : 
      25             : /**
      26             :  * @file
      27             :  * Hap decoder
      28             :  *
      29             :  * Fourcc: Hap1, Hap5, HapY, HapA, HapM
      30             :  *
      31             :  * https://github.com/Vidvox/hap/blob/master/documentation/HapVideoDRAFT.md
      32             :  */
      33             : 
      34             : #include <stdint.h>
      35             : 
      36             : #include "libavutil/imgutils.h"
      37             : 
      38             : #include "avcodec.h"
      39             : #include "bytestream.h"
      40             : #include "hap.h"
      41             : #include "internal.h"
      42             : #include "snappy.h"
      43             : #include "texturedsp.h"
      44             : #include "thread.h"
      45             : 
      46             : /* The first three bytes are the size of the section past the header, or zero
      47             :  * if the length is stored in the next long word. The fourth byte in the first
      48             :  * long word indicates the type of the current section. */
      49          33 : static int parse_section_header(GetByteContext *gbc, int *section_size,
      50             :                                 enum HapSectionType *section_type)
      51             : {
      52          33 :     if (bytestream2_get_bytes_left(gbc) < 4)
      53           0 :         return AVERROR_INVALIDDATA;
      54             : 
      55          33 :     *section_size = bytestream2_get_le24(gbc);
      56          33 :     *section_type = bytestream2_get_byte(gbc);
      57             : 
      58          33 :     if (*section_size == 0) {
      59           4 :         if (bytestream2_get_bytes_left(gbc) < 4)
      60           0 :             return AVERROR_INVALIDDATA;
      61             : 
      62           4 :         *section_size = bytestream2_get_le32(gbc);
      63             :     }
      64             : 
      65          33 :     if (*section_size > bytestream2_get_bytes_left(gbc) || *section_size < 0)
      66           0 :         return AVERROR_INVALIDDATA;
      67             :     else
      68          33 :         return 0;
      69             : }
      70             : 
      71           6 : static int hap_parse_decode_instructions(HapContext *ctx, int size)
      72             : {
      73           6 :     GetByteContext *gbc = &ctx->gbc;
      74             :     int section_size;
      75             :     enum HapSectionType section_type;
      76           6 :     int is_first_table = 1, had_offsets = 0, had_compressors = 0, had_sizes = 0;
      77             :     int i, ret;
      78             : 
      79          24 :     while (size > 0) {
      80          12 :         int stream_remaining = bytestream2_get_bytes_left(gbc);
      81          12 :         ret = parse_section_header(gbc, &section_size, &section_type);
      82          12 :         if (ret != 0)
      83           0 :             return ret;
      84             : 
      85          12 :         size -= stream_remaining - bytestream2_get_bytes_left(gbc);
      86             : 
      87          12 :         switch (section_type) {
      88           6 :             case HAP_ST_COMPRESSOR_TABLE:
      89           6 :                 ret = ff_hap_set_chunk_count(ctx, section_size, is_first_table);
      90           6 :                 if (ret != 0)
      91           0 :                     return ret;
      92          53 :                 for (i = 0; i < section_size; i++) {
      93          47 :                     ctx->chunks[i].compressor = bytestream2_get_byte(gbc) << 4;
      94             :                 }
      95           6 :                 had_compressors = 1;
      96           6 :                 is_first_table = 0;
      97           6 :                 break;
      98           6 :             case HAP_ST_SIZE_TABLE:
      99           6 :                 ret = ff_hap_set_chunk_count(ctx, section_size / 4, is_first_table);
     100           6 :                 if (ret != 0)
     101           0 :                     return ret;
     102          53 :                 for (i = 0; i < section_size / 4; i++) {
     103          47 :                     ctx->chunks[i].compressed_size = bytestream2_get_le32(gbc);
     104             :                 }
     105           6 :                 had_sizes = 1;
     106           6 :                 is_first_table = 0;
     107           6 :                 break;
     108           0 :             case HAP_ST_OFFSET_TABLE:
     109           0 :                 ret = ff_hap_set_chunk_count(ctx, section_size / 4, is_first_table);
     110           0 :                 if (ret != 0)
     111           0 :                     return ret;
     112           0 :                 for (i = 0; i < section_size / 4; i++) {
     113           0 :                     ctx->chunks[i].compressed_offset = bytestream2_get_le32(gbc);
     114             :                 }
     115           0 :                 had_offsets = 1;
     116           0 :                 is_first_table = 0;
     117           0 :                 break;
     118           0 :             default:
     119           0 :                 break;
     120             :         }
     121          12 :         size -= section_size;
     122             :     }
     123             : 
     124           6 :     if (!had_sizes || !had_compressors)
     125           0 :         return AVERROR_INVALIDDATA;
     126             : 
     127             :     /* The offsets table is optional. If not present than calculate offsets by
     128             :      * summing the sizes of preceding chunks. */
     129           6 :     if (!had_offsets) {
     130           6 :         size_t running_size = 0;
     131          53 :         for (i = 0; i < ctx->chunk_count; i++) {
     132          47 :             ctx->chunks[i].compressed_offset = running_size;
     133          47 :             running_size += ctx->chunks[i].compressed_size;
     134             :         }
     135             :     }
     136             : 
     137           6 :     return 0;
     138             : }
     139             : 
     140          12 : static int hap_can_use_tex_in_place(HapContext *ctx)
     141             : {
     142             :     int i;
     143          12 :     size_t running_offset = 0;
     144          15 :     for (i = 0; i < ctx->chunk_count; i++) {
     145          12 :         if (ctx->chunks[i].compressed_offset != running_offset
     146          12 :             || ctx->chunks[i].compressor != HAP_COMP_NONE)
     147           9 :             return 0;
     148           3 :         running_offset += ctx->chunks[i].compressed_size;
     149             :     }
     150           3 :     return 1;
     151             : }
     152             : 
     153          12 : static int hap_parse_frame_header(AVCodecContext *avctx)
     154             : {
     155          12 :     HapContext *ctx = avctx->priv_data;
     156          12 :     GetByteContext *gbc = &ctx->gbc;
     157             :     int section_size;
     158             :     enum HapSectionType section_type;
     159             :     const char *compressorstr;
     160             :     int i, ret;
     161             : 
     162          12 :     ret = parse_section_header(gbc, &ctx->texture_section_size, &section_type);
     163          12 :     if (ret != 0)
     164           0 :         return ret;
     165             : 
     166          24 :     if ((avctx->codec_tag == MKTAG('H','a','p','1') && (section_type & 0x0F) != HAP_FMT_RGBDXT1) ||
     167          25 :         (avctx->codec_tag == MKTAG('H','a','p','5') && (section_type & 0x0F) != HAP_FMT_RGBADXT5) ||
     168          26 :         (avctx->codec_tag == MKTAG('H','a','p','Y') && (section_type & 0x0F) != HAP_FMT_YCOCGDXT5) ||
     169          26 :         (avctx->codec_tag == MKTAG('H','a','p','A') && (section_type & 0x0F) != HAP_FMT_RGTC1) ||
     170          21 :         ((avctx->codec_tag == MKTAG('H','a','p','M') && (section_type & 0x0F) != HAP_FMT_RGTC1) &&
     171           3 :                                                         (section_type & 0x0F) != HAP_FMT_YCOCGDXT5)) {
     172           0 :         av_log(avctx, AV_LOG_ERROR,
     173             :                "Invalid texture format %#04x.\n", section_type & 0x0F);
     174           0 :         return AVERROR_INVALIDDATA;
     175             :     }
     176             : 
     177          12 :     switch (section_type & 0xF0) {
     178           6 :         case HAP_COMP_NONE:
     179             :         case HAP_COMP_SNAPPY:
     180           6 :             ret = ff_hap_set_chunk_count(ctx, 1, 1);
     181           6 :             if (ret == 0) {
     182           6 :                 ctx->chunks[0].compressor = section_type & 0xF0;
     183           6 :                 ctx->chunks[0].compressed_offset = 0;
     184           6 :                 ctx->chunks[0].compressed_size = ctx->texture_section_size;
     185             :             }
     186           6 :             if (ctx->chunks[0].compressor == HAP_COMP_NONE) {
     187           3 :                 compressorstr = "none";
     188             :             } else {
     189           3 :                 compressorstr = "snappy";
     190             :             }
     191           6 :             break;
     192           6 :         case HAP_COMP_COMPLEX:
     193           6 :             ret = parse_section_header(gbc, &section_size, &section_type);
     194           6 :             if (ret == 0 && section_type != HAP_ST_DECODE_INSTRUCTIONS)
     195           0 :                 ret = AVERROR_INVALIDDATA;
     196           6 :             if (ret == 0)
     197           6 :                 ret = hap_parse_decode_instructions(ctx, section_size);
     198           6 :             compressorstr = "complex";
     199           6 :             break;
     200           0 :         default:
     201           0 :             ret = AVERROR_INVALIDDATA;
     202           0 :             break;
     203             :     }
     204             : 
     205          12 :     if (ret != 0)
     206           0 :         return ret;
     207             : 
     208             :     /* Check the frame is valid and read the uncompressed chunk sizes */
     209          12 :     ctx->tex_size = 0;
     210          65 :     for (i = 0; i < ctx->chunk_count; i++) {
     211          53 :         HapChunk *chunk = &ctx->chunks[i];
     212             : 
     213             :         /* Check the compressed buffer is valid */
     214          53 :         if (chunk->compressed_offset + chunk->compressed_size > bytestream2_get_bytes_left(gbc))
     215           0 :             return AVERROR_INVALIDDATA;
     216             : 
     217             :         /* Chunks are unpacked sequentially, ctx->tex_size is the uncompressed
     218             :          * size thus far */
     219          53 :         chunk->uncompressed_offset = ctx->tex_size;
     220             : 
     221             :         /* Fill out uncompressed size */
     222          53 :         if (chunk->compressor == HAP_COMP_SNAPPY) {
     223             :             GetByteContext gbc_tmp;
     224             :             int64_t uncompressed_size;
     225          50 :             bytestream2_init(&gbc_tmp, gbc->buffer + chunk->compressed_offset,
     226          50 :                              chunk->compressed_size);
     227          50 :             uncompressed_size = ff_snappy_peek_uncompressed_length(&gbc_tmp);
     228          50 :             if (uncompressed_size < 0) {
     229           0 :                 return uncompressed_size;
     230             :             }
     231          50 :             chunk->uncompressed_size = uncompressed_size;
     232           3 :         } else if (chunk->compressor == HAP_COMP_NONE) {
     233           3 :             chunk->uncompressed_size = chunk->compressed_size;
     234             :         } else {
     235           0 :             return AVERROR_INVALIDDATA;
     236             :         }
     237          53 :         ctx->tex_size += chunk->uncompressed_size;
     238             :     }
     239             : 
     240          12 :     av_log(avctx, AV_LOG_DEBUG, "%s compressor\n", compressorstr);
     241             : 
     242          12 :     return ret;
     243             : }
     244             : 
     245          50 : static int decompress_chunks_thread(AVCodecContext *avctx, void *arg,
     246             :                                     int chunk_nb, int thread_nb)
     247             : {
     248          50 :     HapContext *ctx = avctx->priv_data;
     249             : 
     250          50 :     HapChunk *chunk = &ctx->chunks[chunk_nb];
     251             :     GetByteContext gbc;
     252          50 :     uint8_t *dst = ctx->tex_buf + chunk->uncompressed_offset;
     253             : 
     254          50 :     bytestream2_init(&gbc, ctx->gbc.buffer + chunk->compressed_offset, chunk->compressed_size);
     255             : 
     256          50 :     if (chunk->compressor == HAP_COMP_SNAPPY) {
     257             :         int ret;
     258          50 :         int64_t uncompressed_size = ctx->tex_size;
     259             : 
     260             :         /* Uncompress the frame */
     261          50 :         ret = ff_snappy_uncompress(&gbc, dst, &uncompressed_size);
     262          50 :         if (ret < 0) {
     263           0 :              av_log(avctx, AV_LOG_ERROR, "Snappy uncompress error\n");
     264           0 :              return ret;
     265             :         }
     266           0 :     } else if (chunk->compressor == HAP_COMP_NONE) {
     267           0 :         bytestream2_get_buffer(&gbc, dst, chunk->compressed_size);
     268             :     }
     269             : 
     270          50 :     return 0;
     271             : }
     272             : 
     273          12 : static int decompress_texture_thread_internal(AVCodecContext *avctx, void *arg,
     274             :                                               int slice, int thread_nb, int texture_num)
     275             : {
     276          12 :     HapContext *ctx = avctx->priv_data;
     277          12 :     AVFrame *frame = arg;
     278          12 :     const uint8_t *d = ctx->tex_data;
     279          12 :     int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
     280          12 :     int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
     281             :     int x, y;
     282             :     int start_slice, end_slice;
     283          12 :     int base_blocks_per_slice = h_block / ctx->slice_count;
     284          12 :     int remainder_blocks = h_block % ctx->slice_count;
     285             : 
     286             :     /* When the frame height (in blocks) doesn't divide evenly between the
     287             :      * number of slices, spread the remaining blocks evenly between the first
     288             :      * operations */
     289          12 :     start_slice = slice * base_blocks_per_slice;
     290             :     /* Add any extra blocks (one per slice) that have been added before this slice */
     291          12 :     start_slice += FFMIN(slice, remainder_blocks);
     292             : 
     293          12 :     end_slice = start_slice + base_blocks_per_slice;
     294             :     /* Add an extra block if there are still remainder blocks to be accounted for */
     295          12 :     if (slice < remainder_blocks)
     296           0 :         end_slice++;
     297             : 
     298         532 :     for (y = start_slice; y < end_slice; y++) {
     299         520 :         uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
     300         520 :         int off  = y * w_block;
     301       62984 :         for (x = 0; x < w_block; x++) {
     302       62464 :             if (texture_num == 0) {
     303      121472 :                 ctx->tex_fun(p + x * 4 * ctx->uncompress_pix_size, frame->linesize[0],
     304       60736 :                              d + (off + x) * ctx->tex_rat);
     305             :             } else {
     306        3456 :                 ctx->tex_fun2(p + x * 4 * ctx->uncompress_pix_size, frame->linesize[0],
     307        1728 :                               d + (off + x) * ctx->tex_rat2);
     308             :             }
     309             :         }
     310             :     }
     311             : 
     312          12 :     return 0;
     313             : }
     314             : 
     315           9 : static int decompress_texture_thread(AVCodecContext *avctx, void *arg,
     316             :                                      int slice, int thread_nb)
     317             : {
     318           9 :     return decompress_texture_thread_internal(avctx, arg, slice, thread_nb, 0);
     319             : }
     320             : 
     321           3 : static int decompress_texture2_thread(AVCodecContext *avctx, void *arg,
     322             :                                       int slice, int thread_nb)
     323             : {
     324           3 :     return decompress_texture_thread_internal(avctx, arg, slice, thread_nb, 1);
     325             : }
     326             : 
     327           9 : static int hap_decode(AVCodecContext *avctx, void *data,
     328             :                       int *got_frame, AVPacket *avpkt)
     329             : {
     330           9 :     HapContext *ctx = avctx->priv_data;
     331             :     ThreadFrame tframe;
     332             :     int ret, i, t;
     333             :     int tex_size;
     334             :     int section_size;
     335             :     enum HapSectionType section_type;
     336           9 :     int start_texture_section = 0;
     337           9 :     int tex_rat[2] = {0, 0};
     338             : 
     339           9 :     bytestream2_init(&ctx->gbc, avpkt->data, avpkt->size);
     340             : 
     341           9 :     tex_rat[0] = ctx->tex_rat;
     342             : 
     343             :     /* check for multi texture header */
     344           9 :     if (ctx->texture_count == 2) {
     345           3 :         ret = parse_section_header(&ctx->gbc, &section_size, &section_type);
     346           3 :         if (ret != 0)
     347           0 :             return ret;
     348           3 :         if ((section_type & 0x0F) != 0x0D) {
     349           0 :             av_log(avctx, AV_LOG_ERROR, "Invalid section type in 2 textures mode %#04x.\n", section_type);
     350           0 :             return AVERROR_INVALIDDATA;
     351             :         }
     352           3 :         start_texture_section = 4;
     353           3 :         tex_rat[1] = ctx->tex_rat2;
     354             :     }
     355             : 
     356             :     /* Get the output frame ready to receive data */
     357           9 :     tframe.f = data;
     358           9 :     ret = ff_thread_get_buffer(avctx, &tframe, 0);
     359           9 :     if (ret < 0)
     360           0 :         return ret;
     361             : 
     362          21 :     for (t = 0; t < ctx->texture_count; t++) {
     363          12 :         bytestream2_seek(&ctx->gbc, start_texture_section, SEEK_SET);
     364             : 
     365             :         /* Check for section header */
     366          12 :         ret = hap_parse_frame_header(avctx);
     367          12 :         if (ret < 0)
     368           0 :             return ret;
     369             : 
     370          12 :         start_texture_section += ctx->texture_section_size + 4;
     371             : 
     372          12 :         if (avctx->codec->update_thread_context)
     373           0 :             ff_thread_finish_setup(avctx);
     374             : 
     375             :         /* Unpack the DXT texture */
     376          12 :         if (hap_can_use_tex_in_place(ctx)) {
     377             :             /* Only DXTC texture compression in a contiguous block */
     378           3 :             ctx->tex_data = ctx->gbc.buffer;
     379           3 :             tex_size = FFMIN(ctx->texture_section_size, bytestream2_get_bytes_left(&ctx->gbc));
     380             :         } else {
     381             :             /* Perform the second-stage decompression */
     382           9 :             ret = av_reallocp(&ctx->tex_buf, ctx->tex_size);
     383           9 :             if (ret < 0)
     384           0 :                 return ret;
     385             : 
     386           9 :             avctx->execute2(avctx, decompress_chunks_thread, NULL,
     387             :                             ctx->chunk_results, ctx->chunk_count);
     388             : 
     389          59 :             for (i = 0; i < ctx->chunk_count; i++) {
     390          50 :                 if (ctx->chunk_results[i] < 0)
     391           0 :                     return ctx->chunk_results[i];
     392             :             }
     393             : 
     394           9 :             ctx->tex_data = ctx->tex_buf;
     395           9 :             tex_size = ctx->tex_size;
     396             :         }
     397             : 
     398          24 :         if (tex_size < (avctx->coded_width  / TEXTURE_BLOCK_W)
     399          12 :             *(avctx->coded_height / TEXTURE_BLOCK_H)
     400          12 :             *tex_rat[t]) {
     401           0 :             av_log(avctx, AV_LOG_ERROR, "Insufficient data\n");
     402           0 :             return AVERROR_INVALIDDATA;
     403             :         }
     404             : 
     405             :         /* Use the decompress function on the texture, one block per thread */
     406          12 :         if (t == 0){
     407           9 :             avctx->execute2(avctx, decompress_texture_thread, tframe.f, NULL, ctx->slice_count);
     408             :         } else{
     409           3 :             tframe.f = data;
     410           3 :             avctx->execute2(avctx, decompress_texture2_thread, tframe.f, NULL, ctx->slice_count);
     411             :         }
     412             :     }
     413             : 
     414             :     /* Frame is ready to be output */
     415           9 :     tframe.f->pict_type = AV_PICTURE_TYPE_I;
     416           9 :     tframe.f->key_frame = 1;
     417           9 :     *got_frame = 1;
     418             : 
     419           9 :     return avpkt->size;
     420             : }
     421             : 
     422          18 : static av_cold int hap_init(AVCodecContext *avctx)
     423             : {
     424          18 :     HapContext *ctx = avctx->priv_data;
     425             :     const char *texture_name;
     426          18 :     int ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
     427             : 
     428          18 :     if (ret < 0) {
     429           0 :         av_log(avctx, AV_LOG_ERROR, "Invalid video size %dx%d.\n",
     430             :                avctx->width, avctx->height);
     431           0 :         return ret;
     432             :     }
     433             : 
     434             :     /* Since codec is based on 4x4 blocks, size is aligned to 4 */
     435          18 :     avctx->coded_width  = FFALIGN(avctx->width,  TEXTURE_BLOCK_W);
     436          18 :     avctx->coded_height = FFALIGN(avctx->height, TEXTURE_BLOCK_H);
     437             : 
     438          18 :     ff_texturedsp_init(&ctx->dxtc);
     439             : 
     440          18 :     ctx->texture_count  = 1;
     441          18 :     ctx->uncompress_pix_size = 4;
     442             : 
     443          18 :     switch (avctx->codec_tag) {
     444           2 :     case MKTAG('H','a','p','1'):
     445           2 :         texture_name = "DXT1";
     446           2 :         ctx->tex_rat = 8;
     447           2 :         ctx->tex_fun = ctx->dxtc.dxt1_block;
     448           2 :         avctx->pix_fmt = AV_PIX_FMT_RGB0;
     449           2 :         break;
     450           2 :     case MKTAG('H','a','p','5'):
     451           2 :         texture_name = "DXT5";
     452           2 :         ctx->tex_rat = 16;
     453           2 :         ctx->tex_fun = ctx->dxtc.dxt5_block;
     454           2 :         avctx->pix_fmt = AV_PIX_FMT_RGBA;
     455           2 :         break;
     456           4 :     case MKTAG('H','a','p','Y'):
     457           4 :         texture_name = "DXT5-YCoCg-scaled";
     458           4 :         ctx->tex_rat = 16;
     459           4 :         ctx->tex_fun = ctx->dxtc.dxt5ys_block;
     460           4 :         avctx->pix_fmt = AV_PIX_FMT_RGB0;
     461           4 :         break;
     462           4 :     case MKTAG('H','a','p','A'):
     463           4 :         texture_name = "RGTC1";
     464           4 :         ctx->tex_rat = 8;
     465           4 :         ctx->tex_fun = ctx->dxtc.rgtc1u_gray_block;
     466           4 :         avctx->pix_fmt = AV_PIX_FMT_GRAY8;
     467           4 :         ctx->uncompress_pix_size = 1;
     468           4 :         break;
     469           6 :     case MKTAG('H','a','p','M'):
     470           6 :         texture_name  = "DXT5-YCoCg-scaled / RGTC1";
     471           6 :         ctx->tex_rat  = 16;
     472           6 :         ctx->tex_rat2 = 8;
     473           6 :         ctx->tex_fun  = ctx->dxtc.dxt5ys_block;
     474           6 :         ctx->tex_fun2 = ctx->dxtc.rgtc1u_alpha_block;
     475           6 :         avctx->pix_fmt = AV_PIX_FMT_RGBA;
     476           6 :         ctx->texture_count = 2;
     477           6 :         break;
     478           0 :     default:
     479           0 :         return AVERROR_DECODER_NOT_FOUND;
     480             :     }
     481             : 
     482          18 :     av_log(avctx, AV_LOG_DEBUG, "%s texture\n", texture_name);
     483             : 
     484          18 :     ctx->slice_count = av_clip(avctx->thread_count, 1,
     485          18 :                                avctx->coded_height / TEXTURE_BLOCK_H);
     486             : 
     487          18 :     return 0;
     488             : }
     489             : 
     490          18 : static av_cold int hap_close(AVCodecContext *avctx)
     491             : {
     492          18 :     HapContext *ctx = avctx->priv_data;
     493             : 
     494          18 :     ff_hap_free_context(ctx);
     495             : 
     496          18 :     return 0;
     497             : }
     498             : 
     499             : AVCodec ff_hap_decoder = {
     500             :     .name           = "hap",
     501             :     .long_name      = NULL_IF_CONFIG_SMALL("Vidvox Hap"),
     502             :     .type           = AVMEDIA_TYPE_VIDEO,
     503             :     .id             = AV_CODEC_ID_HAP,
     504             :     .init           = hap_init,
     505             :     .decode         = hap_decode,
     506             :     .close          = hap_close,
     507             :     .priv_data_size = sizeof(HapContext),
     508             :     .capabilities   = AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS |
     509             :                       AV_CODEC_CAP_DR1,
     510             :     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
     511             :                       FF_CODEC_CAP_INIT_CLEANUP,
     512             : };

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