// Copyright 2013 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 THIRD_PARTY_LIBJINGLE_OVERRIDES_INIT_WEBRTC_H_
#define THIRD_PARTY_LIBJINGLE_OVERRIDES_INIT_WEBRTC_H_

#include <string>

#include "third_party/libjingle/overrides/allocator_shim/allocator_stub.h"
#include "base/logging.h"
#include "third_party/webrtc/system_wrappers/interface/event_tracer.h"

namespace base {
class CommandLine;
}

namespace cricket {
class MediaEngineInterface;
class WebRtcVideoDecoderFactory;
class WebRtcVideoEncoderFactory;
}  // namespace cricket

namespace webrtc {
class AudioDeviceModule;
namespace metrics {
class Histogram;
}  // namespace metrics
}  // namespace webrtc

typedef std::string (*FieldTrialFindFullName)(const std::string& trial_name);

typedef webrtc::metrics::Histogram* (*RtcHistogramFactoryGetCounts)(
    const std::string& name, int min, int max, int bucket_count);
typedef webrtc::metrics::Histogram* (*RtcHistogramFactoryGetEnumeration)(
    const std::string& name, int boundary);
typedef void (*RtcHistogramAdd)(
    webrtc::metrics::Histogram* histogram_pointer,
    const std::string& name,
    int sample);

typedef cricket::MediaEngineInterface* (*CreateWebRtcMediaEngineFunction)(
    webrtc::AudioDeviceModule* adm,
    webrtc::AudioDeviceModule* adm_sc,
    cricket::WebRtcVideoEncoderFactory* encoder_factory,
    cricket::WebRtcVideoDecoderFactory* decoder_factory);

typedef void (*DestroyWebRtcMediaEngineFunction)(
    cricket::MediaEngineInterface* media_engine);

typedef void (*InitDiagnosticLoggingDelegateFunctionFunction)(
    void (*DelegateFunction)(const std::string&));

// A typedef for the main initialize function in libpeerconnection.
// This will initialize logging in the module with the proper arguments
// as well as provide pointers back to a couple webrtc factory functions.
// The reason we get pointers to these functions this way is to avoid having
// to go through GetProcAddress et al and rely on specific name mangling.
// TODO(tommi): The number of functions is growing. Use a struct.
typedef bool (*InitializeModuleFunction)(
    const base::CommandLine& command_line,
#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
    AllocateFunction alloc,
    DellocateFunction dealloc,
#endif
    FieldTrialFindFullName field_trial_find,
    RtcHistogramFactoryGetCounts factory_get_counts,
    RtcHistogramFactoryGetEnumeration factory_get_enumeration,
    RtcHistogramAdd histogram_add,
    logging::LogMessageHandlerFunction log_handler,
    webrtc::GetCategoryEnabledPtr trace_get_category_enabled,
    webrtc::AddTraceEventPtr trace_add_trace_event,
    CreateWebRtcMediaEngineFunction* create_media_engine,
    DestroyWebRtcMediaEngineFunction* destroy_media_engine,
    InitDiagnosticLoggingDelegateFunctionFunction* init_diagnostic_logging);

#if !defined(LIBPEERCONNECTION_IMPLEMENTATION)
// Load and initialize the shared WebRTC module (libpeerconnection).
// Call this explicitly to load and initialize the WebRTC module (e.g. before
// initializing the sandbox in Chrome).
// If not called explicitly, this function will still be called from the main
// CreateWebRtcMediaEngine factory function the first time it is called.
bool InitializeWebRtcModule();
#endif

#endif // THIRD_PARTY_LIBJINGLE_OVERRIDES_INIT_WEBRTC_H_