FFmpeg
libopenh264.c
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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.
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 
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 
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 }
void ff_libopenh264_trace_callback(void *ctx, int level, const char *msg)
Definition: libopenh264.c:41
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_QUIET
Print no output.
Definition: log.h:176
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:220
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
AVFormatContext * ctx
Definition: movenc.c:48
uint8_t level
Definition: svq3.c:205
static int libopenh264_to_ffmpeg_log_level(int libopenh264_log_level)
Definition: libopenh264.c:31
int ff_libopenh264_check_version(void *logctx)
Definition: libopenh264.c:49
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions