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livetrax/gtk2_ardour/sfdb_freesound_mootcher.cc

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/* sfdb_freesound_mootcher.cpp **********************************************************************
Adapted for Ardour by Ben Loftis, March 2008
Updated to new Freesound API by Colin Fletcher, November 2011
Mootcher 23-8-2005
Mootcher Online Access to thefreesoundproject website
http://freesound.iua.upf.edu/
GPL 2005 Jorn Lemon
mail for questions/remarks: mootcher@twistedlemon.nl
or go to the freesound website forum
-----------------------------------------------------------------
Includes:
curl.h (version 7.14.0)
Librarys:
libcurl.lib
-----------------------------------------------------------------
Licence GPL:
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*************************************************************************************/
#include "sfdb_freesound_mootcher.h"
#include "pbd/xml++.h"
#include "pbd/filesystem.h"
#include <sys/stat.h>
#include <sys/types.h>
#include <iostream>
#include "ardour/audio_library.h"
static const std::string base_url = "http://www.freesound.org/api";
static const std::string api_key = "9d77cb8d841b4bcfa960e1aae62224eb"; // ardour3
//------------------------------------------------------------------------
Mootcher::Mootcher(const char *saveLocation)
: curl(curl_easy_init())
{
changeWorkingDir(saveLocation);
};
//------------------------------------------------------------------------
Mootcher:: ~Mootcher()
{
}
//------------------------------------------------------------------------
void Mootcher::changeWorkingDir(const char *saveLocation)
{
basePath = saveLocation;
#ifdef __WIN32__
std::string replace = "/";
size_t pos = basePath.find("\\");
while( pos != std::string::npos ){
basePath.replace(pos, 1, replace);
pos = basePath.find("\\");
}
#endif
//
size_t pos2 = basePath.find_last_of("/");
if(basePath.length() != (pos2+1)) basePath += "/";
}
void Mootcher::ensureWorkingDir ()
{
PBD::sys::path p = basePath;
p /= "snd";
if (!PBD::sys::is_directory (p)) {
PBD::sys::create_directories (p);
}
}
//------------------------------------------------------------------------
size_t Mootcher::WriteMemoryCallback(void *ptr, size_t size, size_t nmemb, void *data)
{
register int realsize = (int)(size * nmemb);
struct MemoryStruct *mem = (struct MemoryStruct *)data;
mem->memory = (char *)realloc(mem->memory, mem->size + realsize + 1);
if (mem->memory) {
memcpy(&(mem->memory[mem->size]), ptr, realsize);
mem->size += realsize;
mem->memory[mem->size] = 0;
}
return realsize;
}
//------------------------------------------------------------------------
std::string Mootcher::sortMethodString(enum sortMethod sort) {
switch (sort) {
case sort_duration_desc: return "duration_desc";
case sort_duration_asc: return "duration_asc";
case sort_created_desc: return "created_desc";
case sort_created_asc: return "created_asc";
case sort_downloads_desc: return "downloads_desc";
case sort_downloads_asc: return "downloads_asc";
case sort_rating_desc: return "rating_desc";
case sort_rating_asc: return "rating_asc";
default: return "";
}
}
//------------------------------------------------------------------------
void Mootcher::setcUrlOptions()
{
// basic init for curl
curl_global_init(CURL_GLOBAL_ALL);
// some servers don't like requests that are made without a user-agent field, so we provide one
curl_easy_setopt(curl, CURLOPT_USERAGENT, "libcurl-agent/1.0");
// setup curl error buffer
curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errorBuffer);
// Allow redirection
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
// Allow connections to time out (without using signals)
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 10);
}
std::string Mootcher::doRequest(std::string uri, std::string params)
{
std::string result;
struct MemoryStruct xml_page;
xml_page.memory = NULL;
xml_page.size = 0;
setcUrlOptions();
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *) &xml_page);
// curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
// curl_easy_setopt(curl, CURLOPT_POSTFIELDS, postMessage.c_str());
// curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, -1);
// the url to get
std::string url = base_url + uri + "?";
if (params != "") {
url += params + "&api_key=" + api_key + "&format=xml";
} else {
url += "api_key=" + api_key + "&format=xml";
}
curl_easy_setopt(curl, CURLOPT_URL, url.c_str() );
std::cerr << "doRequest: " << url << std::endl;
// perform online request
CURLcode res = curl_easy_perform(curl);
if( res != 0 ) {
std::cerr << "curl error " << res << " (" << curl_easy_strerror(res) << ")" << std::endl;
return "";
}
result = xml_page.memory;
// free the memory
if(xml_page.memory){
free( xml_page.memory );
xml_page.memory = NULL;
xml_page.size = 0;
}
return result;
}
std::string Mootcher::searchText(std::string query, int page, std::string filter, enum sortMethod sort)
{
std::string params = "";
char buf[24];
if (page > 1) {
snprintf(buf, 23, "p=%d&", page);
params += buf;
}
params += "q=" + query;
if (filter != "")
params += "&f=" + filter;
if (sort)
params += "&s=" + sortMethodString(sort);
return doRequest("/sounds/search", params);
}
//------------------------------------------------------------------------
std::string Mootcher::getSoundResourceFile(std::string ID)
{
std::string originalSoundURI;
std::string audioFileName;
std::string xmlFileName;
std::string xml;
std::cerr << "getSoundResourceFile(" << ID << ")" << std::endl;
// download the xmlfile into xml_page
xml = doRequest("/sounds/" + ID, "");
XMLTree doc;
doc.read_buffer( xml.c_str() );
XMLNode *freesound = doc.root();
// if the page is not a valid xml document with a 'freesound' root
if (freesound == NULL) {
std::cerr << "getSoundResourceFile: There is no valid root in the xml file" << std::endl;
return "";
}
if (strcmp(doc.root()->name().c_str(), "response") != 0) {
std::cerr << "getSoundResourceFile: root =" << doc.root()->name() << ", != response" << std::endl;
return "";
}
XMLNode *name = freesound->child("original_filename");
XMLNode *filesize = freesound->child("filesize");
// get the file name and size from xml file
if (name && filesize) {
audioFileName = basePath + "snd/" + ID + "-" + name->child("text")->content();
// create new filename with the ID number
xmlFileName = basePath;
xmlFileName += "snd/";
xmlFileName += freesound->child("id")->child("text")->content();
xmlFileName += "-";
xmlFileName += name->child("text")->content();
xmlFileName += ".xml";
// std::cerr << "getSoundResourceFile: saving XML: " << xmlFileName << std::endl;
// save the xml file to disk
ensureWorkingDir();
doc.write(xmlFileName.c_str());
//store all the tags in the database
XMLNode *tags = freesound->child("tags");
if (tags) {
XMLNodeList children = tags->children();
XMLNodeConstIterator niter;
std::vector<std::string> strings;
for (niter = children.begin(); niter != children.end(); ++niter) {
XMLNode *node = *niter;
if( strcmp( node->name().c_str(), "resource") == 0 ) {
XMLNode *text = node->child("text");
if (text) {
// std::cerr << "tag: " << text->content() << std::endl;
strings.push_back(text->content());
}
}
}
ARDOUR::Library->set_tags (std::string("//")+audioFileName, strings);
ARDOUR::Library->save_changes ();
}
}
return audioFileName;
}
int audioFileWrite(void *buffer, size_t size, size_t nmemb, void *file)
{
return (int)fwrite(buffer, size, nmemb, (FILE*) file);
};
//------------------------------------------------------------------------
std::string Mootcher::getAudioFile(std::string originalFileName, std::string ID, std::string audioURL, Gtk::ProgressBar *progress_bar)
{
ensureWorkingDir();
std::string audioFileName = basePath + "snd/" + ID + "-" + originalFileName;
//check to see if audio file already exists
FILE *testFile = fopen(audioFileName.c_str(), "r");
if (testFile) {
fseek (testFile , 0 , SEEK_END);
if (ftell (testFile) > 256) {
std::cerr << "audio file " << audioFileName << " already exists" << std::endl;
fclose (testFile);
return audioFileName;
}
// else file was small, probably an error, delete it and try again
fclose(testFile);
remove( audioFileName.c_str() );
}
//now download the actual file
if (curl) {
FILE* theFile;
theFile = fopen( audioFileName.c_str(), "wb" );
if (theFile) {
// create the download url
audioURL += "?api_key=" + api_key;
setcUrlOptions();
curl_easy_setopt(curl, CURLOPT_URL, audioURL.c_str() );
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, audioFileWrite);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, theFile);
std::cerr << "downloading " << audioFileName << " from " << audioURL << "..." << std::endl;
curl_easy_setopt (curl, CURLOPT_NOPROGRESS, 0); // turn on the progress bar
curl_easy_setopt (curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
curl_easy_setopt (curl, CURLOPT_PROGRESSDATA, progress_bar);
CURLcode res = curl_easy_perform(curl);
fclose(theFile);
curl_easy_setopt (curl, CURLOPT_NOPROGRESS, 1); // turn off the progress bar
progress_bar->set_fraction(0.0);
if( res != 0 ) {
std::cerr << "curl error " << res << " (" << curl_easy_strerror(res) << ")" << std::endl;
remove( audioFileName.c_str() );
return "";
} else {
std::cerr << "done!" << std::endl;
// now download the tags &c.
getSoundResourceFile(ID);
}
}
}
return audioFileName;
}
//---------
int Mootcher::progress_callback(void *bar, double dltotal, double dlnow, double ultotal, double ulnow)
{
//XXX I hope it's OK to do GTK things in this callback. Otherwise
// I'll have to do stuff like in interthread_progress_window.
Gtk::ProgressBar *progress_bar = (Gtk::ProgressBar *) bar;
progress_bar->set_fraction(dlnow/dltotal);
/* Make sure the progress widget gets updated */
while (Glib::MainContext::get_default()->iteration (false)) {
/* do nothing */
}
std::cerr << "progress: " << dlnow << " of " << dltotal << " \r";
return 0;
}