gecko/content/media/plugins/nsMediaPluginHost.cpp
2012-07-30 17:20:58 +03:00

155 lines
3.6 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/TimeStamp.h"
#include "nsTimeRanges.h"
#include "MediaResource.h"
#include "nsHTMLMediaElement.h"
#include "nsMediaPluginHost.h"
#include "nsXPCOMStrings.h"
#include "nsISeekableStream.h"
#include "pratom.h"
#include "nsMediaPluginReader.h"
#include "MPAPI.h"
using namespace MPAPI;
using namespace mozilla;
static MediaResource *GetResource(Decoder *aDecoder)
{
return reinterpret_cast<MediaResource *>(aDecoder->mResource);
}
static bool Read(Decoder *aDecoder, char *aBuffer, int64_t aOffset, uint32_t aCount, uint32_t* aBytes)
{
MediaResource *resource = GetResource(aDecoder);
if (aOffset != resource->Tell()) {
nsresult rv = resource->Seek(nsISeekableStream::NS_SEEK_SET, aOffset);
if (NS_FAILED(rv)) {
return false;
}
}
nsresult rv = resource->Read(aBuffer, aCount, aBytes);
if (NS_FAILED(rv)) {
return false;
}
return true;
}
static uint64_t GetLength(Decoder *aDecoder)
{
return GetResource(aDecoder)->GetLength();
}
static void SetMetaDataReadMode(Decoder *aDecoder)
{
GetResource(aDecoder)->SetReadMode(nsMediaCacheStream::MODE_METADATA);
}
static void SetPlaybackReadMode(Decoder *aDecoder)
{
GetResource(aDecoder)->SetReadMode(nsMediaCacheStream::MODE_PLAYBACK);
}
static PluginHost sPluginHost = {
Read,
GetLength,
SetMetaDataReadMode,
SetPlaybackReadMode
};
void nsMediaPluginHost::TryLoad(const char *name)
{
PRLibrary *lib = PR_LoadLibrary(name);
if (lib) {
Manifest *manifest = static_cast<Manifest *>(PR_FindSymbol(lib, "MPAPI_MANIFEST"));
if (manifest)
mPlugins.AppendElement(manifest);
}
}
nsMediaPluginHost::nsMediaPluginHost() {
MOZ_COUNT_CTOR(nsMediaPluginHost);
#ifdef ANDROID
TryLoad("libomxplugin.so");
#endif
}
nsMediaPluginHost::~nsMediaPluginHost() {
MOZ_COUNT_DTOR(nsMediaPluginHost);
}
bool nsMediaPluginHost::FindDecoder(const nsACString& aMimeType, const char* const** aCodecs)
{
const char *chars;
size_t len = NS_CStringGetData(aMimeType, &chars, nullptr);
for (size_t n = 0; n < mPlugins.Length(); ++n) {
Manifest *plugin = mPlugins[n];
const char* const *codecs;
if (plugin->CanDecode(chars, len, &codecs)) {
if (aCodecs)
*aCodecs = codecs;
return true;
}
}
return false;
}
Decoder::Decoder() :
mResource(NULL), mPrivate(NULL)
{
}
MPAPI::Decoder *nsMediaPluginHost::CreateDecoder(MediaResource *aResource, const nsACString& aMimeType)
{
const char *chars;
size_t len = NS_CStringGetData(aMimeType, &chars, nullptr);
Decoder *decoder = new Decoder();
if (!decoder) {
return nullptr;
}
decoder->mResource = aResource;
for (size_t n = 0; n < mPlugins.Length(); ++n) {
Manifest *plugin = mPlugins[n];
const char* const *codecs;
if (!plugin->CanDecode(chars, len, &codecs)) {
continue;
}
if (plugin->CreateDecoder(&sPluginHost, decoder, chars, len)) {
return decoder;
}
}
return nullptr;
}
void nsMediaPluginHost::DestroyDecoder(Decoder *aDecoder)
{
aDecoder->DestroyDecoder(aDecoder);
delete aDecoder;
}
nsMediaPluginHost *sMediaPluginHost = nullptr;
nsMediaPluginHost *GetMediaPluginHost()
{
if (!sMediaPluginHost) {
sMediaPluginHost = new nsMediaPluginHost();
}
return sMediaPluginHost;
}
void nsMediaPluginHost::Shutdown()
{
if (sMediaPluginHost) {
delete sMediaPluginHost;
sMediaPluginHost = nullptr;
}
}