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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "plstr.h"
#include "nsDeviceChannel.h"
#include "nsDeviceCaptureProvider.h"
using namespace mozilla;
// Copied from image/decoders/icon/nsIconURI.cpp
// takes a string like ?size=32&contentType=text/html and returns a new string
// containing just the attribute values. i.e you could pass in this string with
// an attribute name of "size=", this will return 32
// Assumption: attribute pairs are separated by &
void extractAttributeValue(const char* searchString, const char* attributeName, nsCString& result)
{
result.Truncate();
if (!searchString || !attributeName)
return;
uint32_t attributeNameSize = strlen(attributeName);
const char *startOfAttribute = PL_strcasestr(searchString, attributeName);
if (!startOfAttribute ||
!( *(startOfAttribute-1) == '?' || *(startOfAttribute-1) == '&') )
return;
startOfAttribute += attributeNameSize; // Skip the attributeName
if (!*startOfAttribute)
return;
const char *endOfAttribute = strchr(startOfAttribute, '&');
if (endOfAttribute) {
result.Assign(Substring(startOfAttribute, endOfAttribute));
} else {
result.Assign(startOfAttribute);
}
}
NS_IMPL_ISUPPORTS_INHERITED(nsDeviceChannel,
nsBaseChannel,
nsIChannel)
// nsDeviceChannel methods
nsDeviceChannel::nsDeviceChannel()
{
SetContentType(NS_LITERAL_CSTRING("image/png"));
}
nsDeviceChannel::~nsDeviceChannel()
{
}
nsresult
nsDeviceChannel::Init(nsIURI* aUri)
{
nsBaseChannel::Init();
nsBaseChannel::SetURI(aUri);
return NS_OK;
}
nsresult
nsDeviceChannel::OpenContentStream(bool aAsync,
nsIInputStream** aStream,
nsIChannel** aChannel)
{
if (!aAsync)
return NS_ERROR_NOT_IMPLEMENTED;
nsCOMPtr<nsIURI> uri = nsBaseChannel::URI();
*aStream = nullptr;
*aChannel = nullptr;
NS_NAMED_LITERAL_CSTRING(width, "width=");
NS_NAMED_LITERAL_CSTRING(height, "height=");
nsAutoCString spec;
nsresult rv = uri->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString type;
RefPtr<nsDeviceCaptureProvider> capture;
nsCaptureParams captureParams;
captureParams.camera = 0;
if (kNotFound != spec.Find(NS_LITERAL_CSTRING("type=image/png"),
true,
0,
-1)) {
type.AssignLiteral("image/png");
SetContentType(type);
captureParams.captureAudio = false;
captureParams.captureVideo = true;
captureParams.timeLimit = 0;
captureParams.frameLimit = 1;
nsAutoCString buffer;
extractAttributeValue(spec.get(), "width=", buffer);
nsresult err;
captureParams.width = buffer.ToInteger(&err);
if (!captureParams.width)
captureParams.width = 640;
extractAttributeValue(spec.get(), "height=", buffer);
captureParams.height = buffer.ToInteger(&err);
if (!captureParams.height)
captureParams.height = 480;
extractAttributeValue(spec.get(), "camera=", buffer);
captureParams.camera = buffer.ToInteger(&err);
captureParams.bpp = 32;
} else if (kNotFound != spec.Find(NS_LITERAL_CSTRING("type=video/x-raw-yuv"),
true,
0,
-1)) {
type.AssignLiteral("video/x-raw-yuv");
SetContentType(type);
captureParams.captureAudio = false;
captureParams.captureVideo = true;
nsAutoCString buffer;
extractAttributeValue(spec.get(), "width=", buffer);
nsresult err;
captureParams.width = buffer.ToInteger(&err);
if (!captureParams.width)
captureParams.width = 640;
extractAttributeValue(spec.get(), "height=", buffer);
captureParams.height = buffer.ToInteger(&err);
if (!captureParams.height)
captureParams.height = 480;
extractAttributeValue(spec.get(), "camera=", buffer);
captureParams.camera = buffer.ToInteger(&err);
captureParams.bpp = 32;
captureParams.timeLimit = 0;
captureParams.frameLimit = 60000;
} else {
return NS_ERROR_NOT_IMPLEMENTED;
}
if (!capture)
return NS_ERROR_FAILURE;
return capture->Init(type, &captureParams, aStream);
}
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