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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/error.h"
#include <sys/stat.h>
#include <sys/types.h>
#include <iostream>
#include <glib.h>
#include <glib/gstdio.h>
#include "i18n.h"
#include "ardour/audio_library.h"
#include "ardour/rc_configuration.h"
#include "pbd/pthread_utils.h"
#include "gui_thread.h"
using namespace PBD;
static const std::string base_url = "http://www.freesound.org/api";
static const std::string api_key = "9d77cb8d841b4bcfa960e1aae62224eb"; // ardour3
//------------------------------------------------------------------------
Mootcher::Mootcher()
: curl(curl_easy_init())
{
cancel_download_btn.set_label (_("Cancel"));
progress_hbox.pack_start (progress_bar, true, true);
progress_hbox.pack_end (cancel_download_btn, false, false);
progress_bar.show();
cancel_download_btn.show();
cancel_download_btn.signal_clicked().connect(sigc::mem_fun (*this, &Mootcher::cancelDownload));
};
//------------------------------------------------------------------------
Mootcher:: ~Mootcher()
{
curl_easy_cleanup(curl);
}
//------------------------------------------------------------------------
void Mootcher::ensureWorkingDir ()
{
std::string p = ARDOUR::Config->get_freesound_download_dir();
if (!Glib::file_test (p, Glib::FILE_TEST_IS_DIR)) {
if (g_mkdir_with_parents (p.c_str(), 0775) != 0) {
PBD::error << "Unable to create Mootcher working dir" << endmsg;
}
}
basePath = p;
#ifdef PLATFORM_WINDOWS
std::string replace = "/";
size_t pos = basePath.find("\\");
while( pos != std::string::npos ){
basePath.replace(pos, 1, replace);
pos = basePath.find("\\");
}
#endif
}
//------------------------------------------------------------------------
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)
{
// given a sort type, returns the string value to be passed to the API to
// sort the results in the requested way.
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, 30);
}
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() );
// perform online request
CURLcode res = curl_easy_perform(curl);
if( res != 0 ) {
error << string_compose (_("curl error %1 (%2)"), res, curl_easy_strerror(res)) << endmsg;
return "";
}
// free the memory
if (xml_page.memory) {
result = xml_page.memory;
}
free (xml_page.memory);
xml_page.memory = NULL;
xml_page.size = 0;
return result;
}
std::string Mootcher::searchSimilar(std::string id)
{
std::string params = "";
params += "&fields=id,original_filename,duration,filesize,samplerate,license,serve";
params += "&num_results=100";
return doRequest("/sounds/" + id + "/similar", params);
}
//------------------------------------------------------------------------
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;
}
char *eq = curl_easy_escape(curl, query.c_str(), query.length());
params += "q=\"" + std::string(eq) + "\"";
free(eq);
if (filter != "") {
char *ef = curl_easy_escape(curl, filter.c_str(), filter.length());
params += "&f=" + std::string(ef);
free(ef);
}
if (sort)
params += "&s=" + sortMethodString(sort);
params += "&fields=id,original_filename,duration,filesize,samplerate,license,serve";
params += "&sounds_per_page=100";
return doRequest("/sounds/search", params);
}
//------------------------------------------------------------------------
std::string Mootcher::getSoundResourceFile(std::string ID)
{
std::string originalSoundURI;
std::string audioFileName;
std::string xml;
// 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) {
error << _("getSoundResourceFile: There is no valid root in the xml file") << endmsg;
return "";
}
if (strcmp(doc.root()->name().c_str(), "response") != 0) {
error << string_compose (_("getSoundResourceFile: root = %1, != response"), doc.root()->name()) << endmsg;
return "";
}
XMLNode *name = freesound->child("original_filename");
// get the file name and size from xml file
if (name) {
audioFileName = Glib::build_filename (basePath, ID + "-" + name->child("text")->content());
//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);
};
//------------------------------------------------------------------------
void *
Mootcher::threadFunc() {
CURLcode res;
res = curl_easy_perform (curl);
fclose (theFile);
curl_easy_setopt (curl, CURLOPT_NOPROGRESS, 1); // turn off the progress bar
if (res != CURLE_OK) {
/* it's not an error if the user pressed the stop button */
if (res != CURLE_ABORTED_BY_CALLBACK) {
error << string_compose (_("curl error %1 (%2)"), res, curl_easy_strerror(res)) << endmsg;
}
remove ( (audioFileName+".part").c_str() );
} else {
rename ( (audioFileName+".part").c_str(), audioFileName.c_str() );
// now download the tags &c.
getSoundResourceFile(ID);
}
return (void *) res;
}
void
Mootcher::doneWithMootcher()
{
// update the sound info pane if the selection in the list box is still us
sfb->refresh_display(ID, audioFileName);
delete this; // this should be OK to do as long as Progress and Finished signals are always received in the order in which they are emitted
}
static void *
freesound_download_thread_func(void *arg)
{
Mootcher *thisMootcher = (Mootcher *) arg;
void *res;
// std::cerr << "freesound_download_thread_func(" << arg << ")" << std::endl;
res = thisMootcher->threadFunc();
thisMootcher->Finished(); /* EMIT SIGNAL */
return res;
}
//------------------------------------------------------------------------
bool Mootcher::checkAudioFile(std::string originalFileName, std::string theID)
{
ensureWorkingDir();
ID = theID;
audioFileName = Glib::build_filename (basePath, ID + "-" + originalFileName);
// check to see if audio file already exists
FILE *testFile = g_fopen(audioFileName.c_str(), "r");
if (testFile) {
fseek (testFile , 0 , SEEK_END);
if (ftell (testFile) > 256) {
fclose (testFile);
return true;
}
// else file was small, probably an error, delete it
fclose(testFile);
remove( audioFileName.c_str() );
}
return false;
}
bool Mootcher::fetchAudioFile(std::string originalFileName, std::string theID, std::string audioURL, SoundFileBrowser *caller)
{
ensureWorkingDir();
ID = theID;
audioFileName = Glib::build_filename (basePath, ID + "-" + originalFileName);
if (!curl) {
return false;
}
// now download the actual file
theFile = g_fopen( (audioFileName + ".part").c_str(), "wb" );
if (!theFile) {
return false;
}
// 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::string prog;
prog = string_compose (_("%1"), originalFileName);
progress_bar.set_text(prog);
Gtk::VBox *freesound_vbox = dynamic_cast<Gtk::VBox *> (caller->notebook.get_nth_page(2));
freesound_vbox->pack_start(progress_hbox, Gtk::PACK_SHRINK);
progress_hbox.show();
cancel_download = false;
sfb = caller;
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, this);
Progress.connect(*this, invalidator (*this), boost::bind(&Mootcher::updateProgress, this, _1, _2), gui_context());
Finished.connect(*this, invalidator (*this), boost::bind(&Mootcher::doneWithMootcher, this), gui_context());
pthread_t freesound_download_thread;
pthread_create_and_store("freesound_import", &freesound_download_thread, freesound_download_thread_func, this);
return true;
}
//---------
void
Mootcher::updateProgress(double dlnow, double dltotal)
{
if (dltotal > 0) {
double fraction = dlnow / dltotal;
// std::cerr << "progress idle: " << progress->bar->get_text() << ". " << progress->dlnow << " / " << progress->dltotal << " = " << fraction << std::endl;
if (fraction > 1.0) {
fraction = 1.0;
} else if (fraction < 0.0) {
fraction = 0.0;
}
progress_bar.set_fraction(fraction);
}
}
int
Mootcher::progress_callback(void *caller, double dltotal, double dlnow, double /*ultotal*/, double /*ulnow*/)
{
// It may seem curious to pass a pointer to an instance of an object to a static
// member function, but we can't use a normal member function as a curl progress callback,
// and we want access to some private members of Mootcher.
Mootcher *thisMootcher = (Mootcher *) caller;
if (thisMootcher->cancel_download) {
return -1;
}
thisMootcher->Progress(dlnow, dltotal); /* EMIT SIGNAL */
return 0;
}