nsresult
AppleVDADecoder::InitializeSession()
{
OSStatus rv;
AutoCFRelease<CFDictionaryRef> decoderConfig =
CreateDecoderSpecification();
AutoCFRelease<CFDictionaryRef> outputConfiguration =
CreateOutputConfiguration();
rv =
VDADecoderCreate(decoderConfig,
outputConfiguration,
(VDADecoderOutputCallback*)PlatformCallback,
this,
&mDecoder);
if (rv != noErr) {
NS_WARNING("AppleVDADecoder: Couldn't create hardware VDA decoder");
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult
AppleVTDecoder::InitializeSession()
{
OSStatus rv;
AutoCFRelease<CFDictionaryRef> extensions = CreateDecoderExtensions();
rv = CMVideoFormatDescriptionCreate(kCFAllocatorDefault,
kCMVideoCodecType_H264,
mPictureWidth,
mPictureHeight,
extensions,
&mFormat);
if (rv != noErr) {
NS_ERROR("Couldn't create format description!");
return NS_ERROR_FAILURE;
}
// Contruct video decoder selection spec.
AutoCFRelease<CFDictionaryRef> spec = CreateDecoderSpecification();
// Contruct output configuration.
AutoCFRelease<CFDictionaryRef> outputConfiguration =
CreateOutputConfiguration();
VTDecompressionOutputCallbackRecord cb = { PlatformCallback, this };
rv = VTDecompressionSessionCreate(kCFAllocatorDefault,
mFormat,
spec, // Video decoder selection.
outputConfiguration, // Output video format.
&cb,
&mSession);
if (rv != noErr) {
NS_ERROR("Couldn't create decompression session!");
return NS_ERROR_FAILURE;
}
if (AppleVTLinker::skPropUsingHWAccel) {
CFBooleanRef isUsingHW = nullptr;
rv = VTSessionCopyProperty(mSession,
AppleVTLinker::skPropUsingHWAccel,
kCFAllocatorDefault,
&isUsingHW);
if (rv != noErr) {
LOG("AppleVTDecoder: system doesn't support hardware acceleration");
}
mIsHardwareAccelerated = rv == noErr && isUsingHW == kCFBooleanTrue;
LOG("AppleVTDecoder: %s hardware accelerated decoding",
mIsHardwareAccelerated ? "using" : "not using");
} else {
LOG("AppleVTDecoder: couldn't determine hardware acceleration status.");
}
return NS_OK;
}
nsresult
AppleVTDecoder::InitializeSession()
{
OSStatus rv;
#ifdef LOG_MEDIA_SHA1
SHA1Sum avc_hash;
avc_hash.update(mExtraData->Elements(),mExtraData->Length());
uint8_t digest_buf[SHA1Sum::kHashSize];
avc_hash.finish(digest_buf);
nsAutoCString avc_digest;
for (size_t i = 0; i < sizeof(digest_buf); i++) {
avc_digest.AppendPrintf("%02x", digest_buf[i]);
}
LOG("AVCDecoderConfig %ld bytes sha1 %s",
mExtraData->Length(), avc_digest.get());
#endif // LOG_MEDIA_SHA1
AutoCFRelease<CFDictionaryRef> extensions = CreateDecoderExtensions();
rv = CMVideoFormatDescriptionCreate(kCFAllocatorDefault,
kCMVideoCodecType_H264,
mPictureWidth,
mPictureHeight,
extensions,
&mFormat);
if (rv != noErr) {
NS_ERROR("Couldn't create format description!");
return NS_ERROR_FAILURE;
}
// Contruct video decoder selection spec.
AutoCFRelease<CFDictionaryRef> spec = CreateDecoderSpecification();
// Contruct output configuration.
AutoCFRelease<CFDictionaryRef> outputConfiguration =
CreateOutputConfiguration();
VTDecompressionOutputCallbackRecord cb = { PlatformCallback, this };
rv = VTDecompressionSessionCreate(kCFAllocatorDefault,
mFormat,
spec, // Video decoder selection.
outputConfiguration, // Output video format.
&cb,
&mSession);
if (rv != noErr) {
NS_ERROR("Couldn't create decompression session!");
return NS_ERROR_FAILURE;
}
if (AppleVTLinker::skPropUsingHWAccel) {
CFBooleanRef isUsingHW = nullptr;
rv = VTSessionCopyProperty(mSession,
AppleVTLinker::skPropUsingHWAccel,
kCFAllocatorDefault,
&isUsingHW);
if (rv != noErr) {
LOG("AppleVTDecoder: system doesn't support hardware acceleration");
}
mIsHardwareAccelerated = rv == noErr && isUsingHW == kCFBooleanTrue;
LOG("AppleVTDecoder: %s hardware accelerated decoding",
mIsHardwareAccelerated ? "using" : "not using");
} else {
LOG("AppleVTDecoder: couldn't determine hardware acceleration status.");
}
return NS_OK;
}
