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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_FFMPEG_FFMPEG_COMMON_H_
#define MEDIA_FFMPEG_FFMPEG_COMMON_H_
// Used for FFmpeg error codes.
#include <cerrno>
#include "base/compiler_specific.h"
#include "base/singleton.h"
// Used with URLProtocol.
typedef int64 offset_t;
// Include FFmpeg header files.
extern "C" {
// Temporarily disable possible loss of data warning.
// TODO(scherkus): fix and upstream the compiler warnings.
MSVC_PUSH_DISABLE_WARNING(4244);
#include "third_party/ffmpeg/include/libavcodec/avcodec.h"
#include "third_party/ffmpeg/include/libavformat/avformat.h"
#include "third_party/ffmpeg/include/libavutil/log.h"
MSVC_POP_WARNING();
} // extern "C"
namespace media {
// FFmpegLock is used to serialize calls to avcodec_open(), avcodec_close(),
// and av_find_stream_info() for an entire process because for whatever reason
// it does Very Bad Things to other FFmpeg instances.
//
// TODO(scherkus): track down and upstream a fix to FFmpeg, if possible.
class FFmpegLock : public Singleton<FFmpegLock> {
public:
Lock& lock();
private:
// Only allow Singleton to create and delete FFmpegLock.
friend struct DefaultSingletonTraits<FFmpegLock>;
FFmpegLock();
virtual ~FFmpegLock();
Lock lock_;
DISALLOW_COPY_AND_ASSIGN(FFmpegLock);
};
// Wraps FFmpeg's av_free() in a class that can be passed as a template argument
// to scoped_ptr_malloc.
class ScopedPtrAVFree {
public:
inline void operator()(void* x) const {
av_free(x);
}
};
// This assumes that the AVPacket being captured was allocated outside of
// FFmpeg via the new operator. Do not use this with AVPacket instances that
// are allocated via malloc() or av_malloc().
class ScopedPtrAVFreePacket {
public:
inline void operator()(void* x) const {
AVPacket* packet = static_cast<AVPacket*>(x);
av_free_packet(packet);
delete packet;
}
};
// FFmpeg MIME types.
namespace mime_type {
extern const char kFFmpegAudio[];
extern const char kFFmpegVideo[];
} // namespace mime_type
} // namespace media
#endif // MEDIA_FFMPEG_FFMPEG_COMMON_H_
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