latest SDK

foobar2000/SDK/playback_control.cpp

@@ -0,0 +1,139 @@
+#include "foobar2000.h"
+
+static double parseFraction(const char * fraction) {
+	unsigned v = 0, d = 1;
+	while(pfc::char_is_numeric( *fraction) ) {
+		d *= 10;
+		v *= 10;
+		v += (unsigned) ( *fraction - '0' );
+		++fraction;
+	}
+	PFC_ASSERT( *fraction == 0 );
+	return (double)v / (double)d;
+}
+
+static double parse_time(const char * time) {
+	unsigned vTotal = 0, vCur = 0;
+	for(;;) {
+		char c = *time++;
+		if (c == 0) return (double) (vTotal + vCur);
+		else if (pfc::char_is_numeric( c ) ) {
+			vCur = vCur * 10 + (unsigned)(c-'0');
+		} else if (c == ':') {
+			if (vCur >= 60) {PFC_ASSERT(!"Invalid input"); return 0; }
+			vTotal += vCur; vCur = 0; vTotal *= 60;
+		} else if (c == '.') {
+			return (double) (vTotal + vCur) + parseFraction(time);
+		} else {
+			PFC_ASSERT(!"Invalid input"); return 0;
+		}
+	}
+}
+
+double playback_control::playback_get_length()
+{
+	double rv = 0;
+	metadb_handle_ptr ptr;
+	if (get_now_playing(ptr))
+	{
+		rv = ptr->get_length();
+	}
+	return rv;
+}
+
+double playback_control::playback_get_length_ex() {
+	double rv = 0;
+	metadb_handle_ptr ptr;
+	if (get_now_playing(ptr))
+	{
+		rv = ptr->get_length();
+		if (rv <= 0) {
+			pfc::string8 temp;
+			titleformat_object::ptr script;
+			titleformat_compiler::get()->compile_force(script, "[%length_ex%]");
+			this->playback_format_title(NULL, temp, script, NULL, display_level_titles);
+			if (temp.length() > 0) rv = parse_time(temp);
+		}
+	}
+	return rv;
+}
+
+
+
+
+
+
+void playback_control::userPrev() {
+	userActionHook();
+	if (this->is_playing() && this->playback_can_seek() && this->playback_get_position() > 5) {
+		this->playback_seek(0);
+	} else {
+		this->previous();
+	}
+}
+
+void playback_control::userNext() {
+	userActionHook();
+	this->start(track_command_next);
+}
+
+void playback_control::userMute() {
+	userActionHook();
+	this->volume_mute_toggle();
+}
+
+void playback_control::userStop() {
+	userActionHook();
+	this->stop();
+}
+
+void playback_control::userPlay() {
+	userActionHook();
+	this->play_or_pause();
+}
+
+void playback_control::userPause() {
+	userActionHook();
+	nonUserPause();
+}
+
+void playback_control::nonUserPause() {
+	if (this->is_playing()) {
+		this->pause(true);
+	}
+}
+
+void playback_control::userStart() {
+	userActionHook();
+	if (this->is_playing()) {
+		this->pause(false);
+	} else {
+		this->start();
+	}
+}
+static const double seekDelta = 30;
+void playback_control::userFastForward() {
+	userActionHook();
+	if (!this->playback_can_seek()) {
+		this->userNext(); return;
+	}
+	this->playback_seek_delta(seekDelta);
+}
+
+void playback_control::userRewind() {
+	userActionHook();
+	if (!this->playback_can_seek()) {
+		this->userPrev(); return;
+	}
+	double p = this->playback_get_position();
+	if (p < 0) return;
+	if (p < seekDelta) {
+		if (p < seekDelta / 3) {
+			this->userPrev();
+		} else {
+			this->playback_seek(0);
+		}
+	} else {
+		this->playback_seek_delta(-30);
+	}
+}