| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Wrappers for zlib | ||
| 3 | * Copyright (C) 2022 Andreas Rheinhardt | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include <zlib.h> | ||
| 23 | |||
| 24 | #include "config.h" | ||
| 25 | #include "libavutil/error.h" | ||
| 26 | #include "libavutil/log.h" | ||
| 27 | #include "libavutil/mem.h" | ||
| 28 | #include "zlib_wrapper.h" | ||
| 29 | |||
| 30 | 502 | static void *alloc_wrapper(void *opaque, uInt items, uInt size) | |
| 31 | { | ||
| 32 | 502 | return av_malloc_array(items, size); | |
| 33 | } | ||
| 34 | |||
| 35 | 502 | static void free_wrapper(void *opaque, void *ptr) | |
| 36 | { | ||
| 37 | 502 | av_free(ptr); | |
| 38 | 502 | } | |
| 39 | |||
| 40 | #if CONFIG_INFLATE_WRAPPER | ||
| 41 | 210 | int ff_inflate_init(FFZStream *z, void *logctx) | |
| 42 | { | ||
| 43 | 210 | z_stream *const zstream = &z->zstream; | |
| 44 | int zret; | ||
| 45 | |||
| 46 | 210 | z->inited = 0; | |
| 47 | 210 | zstream->next_in = Z_NULL; | |
| 48 | 210 | zstream->avail_in = 0; | |
| 49 | 210 | zstream->zalloc = alloc_wrapper; | |
| 50 | 210 | zstream->zfree = free_wrapper; | |
| 51 | 210 | zstream->opaque = Z_NULL; | |
| 52 | |||
| 53 | 210 | zret = inflateInit(zstream); | |
| 54 |
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210 | if (zret == Z_OK) { |
| 55 | 210 | z->inited = 1; | |
| 56 | } else { | ||
| 57 | ✗ | av_log(logctx, AV_LOG_ERROR, "inflateInit error %d, message: %s\n", | |
| 58 | ✗ | zret, zstream->msg ? zstream->msg : ""); | |
| 59 | ✗ | return AVERROR_EXTERNAL; | |
| 60 | } | ||
| 61 | 210 | return 0; | |
| 62 | } | ||
| 63 | |||
| 64 | 212 | void ff_inflate_end(FFZStream *z) | |
| 65 | { | ||
| 66 |
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212 | if (z->inited) { |
| 67 | 210 | z->inited = 0; | |
| 68 | 210 | inflateEnd(&z->zstream); | |
| 69 | } | ||
| 70 | 212 | } | |
| 71 | #endif | ||
| 72 | |||
| 73 | #if CONFIG_DEFLATE_WRAPPER | ||
| 74 | 23 | int ff_deflate_init(FFZStream *z, int level, void *logctx) | |
| 75 | { | ||
| 76 | 23 | z_stream *const zstream = &z->zstream; | |
| 77 | int zret; | ||
| 78 | |||
| 79 | 23 | z->inited = 0; | |
| 80 | 23 | zstream->zalloc = alloc_wrapper; | |
| 81 | 23 | zstream->zfree = free_wrapper; | |
| 82 | 23 | zstream->opaque = Z_NULL; | |
| 83 | |||
| 84 | 23 | zret = deflateInit(zstream, level); | |
| 85 |
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23 | if (zret == Z_OK) { |
| 86 | 23 | z->inited = 1; | |
| 87 | } else { | ||
| 88 | ✗ | av_log(logctx, AV_LOG_ERROR, "deflateInit error %d, message: %s\n", | |
| 89 | ✗ | zret, zstream->msg ? zstream->msg : ""); | |
| 90 | ✗ | return AVERROR_EXTERNAL; | |
| 91 | } | ||
| 92 | 23 | return 0; | |
| 93 | } | ||
| 94 | |||
| 95 | 23 | void ff_deflate_end(FFZStream *z) | |
| 96 | { | ||
| 97 |
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23 | if (z->inited) { |
| 98 | 23 | z->inited = 0; | |
| 99 | 23 | deflateEnd(&z->zstream); | |
| 100 | } | ||
| 101 | 23 | } | |
| 102 | #endif | ||
| 103 |