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1 /*
2  * OpenH264 shared utils
3  * Copyright (C) 2014 Martin Storsjo
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 <string.h>
23 #include <wels/codec_api.h>
24 #include <wels/codec_ver.h>
25 
26 #include "libavutil/log.h"
27 
28 #include "libopenh264.h"
29 
30 // Convert libopenh264 log level to equivalent ffmpeg log level.
libopenh264_to_ffmpeg_log_level(int libopenh264_log_level)31 static int libopenh264_to_ffmpeg_log_level(int libopenh264_log_level)
32 {
33     if      (libopenh264_log_level >= WELS_LOG_DETAIL)  return AV_LOG_TRACE;
34     else if (libopenh264_log_level >= WELS_LOG_DEBUG)   return AV_LOG_DEBUG;
35     else if (libopenh264_log_level >= WELS_LOG_INFO)    return AV_LOG_VERBOSE;
36     else if (libopenh264_log_level >= WELS_LOG_WARNING) return AV_LOG_WARNING;
37     else if (libopenh264_log_level >= WELS_LOG_ERROR)   return AV_LOG_ERROR;
38     else                                                return AV_LOG_QUIET;
39 }
40 
ff_libopenh264_trace_callback(void * ctx,int level,const char * msg)41 void ff_libopenh264_trace_callback(void *ctx, int level, const char *msg)
42 {
43     // The message will be logged only if the requested EQUIVALENT ffmpeg log level is
44     // less than or equal to the current ffmpeg log level.
45     int equiv_ffmpeg_log_level = libopenh264_to_ffmpeg_log_level(level);
46     av_log(ctx, equiv_ffmpeg_log_level, "%s\n", msg);
47 }
48 
ff_libopenh264_check_version(void * logctx)49 int ff_libopenh264_check_version(void *logctx)
50 {
51     // Mingw GCC < 4.7 on x86_32 uses an incorrect/buggy ABI for the WelsGetCodecVersion
52     // function (for functions returning larger structs), thus skip the check in those
53     // configurations.
54 #if !defined(_WIN32) || !defined(__GNUC__) || !ARCH_X86_32 || AV_GCC_VERSION_AT_LEAST(4, 7)
55     OpenH264Version libver = WelsGetCodecVersion();
56     if (memcmp(&libver, &g_stCodecVersion, sizeof(libver))) {
57         av_log(logctx, AV_LOG_ERROR, "Incorrect library version loaded\n");
58         return AVERROR(EINVAL);
59     }
60 #endif
61     return 0;
62 }
63