Basic code for media streaming + testing on music.

Telegram/SourceFiles/data/data_document.cpp

@@ -28,6 +28,10 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "mainwindow.h"
 #include "core/application.h"
 
+// #TODO streaming
+#include "media/streaming/media_streaming_file.h"
+#include "media/streaming/media_streaming_loader_mtproto.h"
+
 namespace {
 
 constexpr auto kMemoryForCache = 32 * 1024 * 1024;
@@ -303,6 +307,24 @@ void DocumentOpenClickHandler::Open(
 			return;
 		}
 	}
+	if (playMusic || playVideo) {
+		AssertIsDebug();
+		if (auto loader = data->createStreamingLoader(origin)) {
+			static auto file = std::unique_ptr<Media::Streaming::File>();
+			file = std::make_unique<Media::Streaming::File>(
+				&data->owner(),
+				std::move(loader));
+			data->session().lifetime().add([] {
+				file = nullptr;
+			});
+			file->start(
+				(playMusic
+					? Media::Streaming::Mode::Audio
+					: Media::Streaming::Mode::Video),
+				0);
+		}
+		return;
+	}
 	if (!location.isEmpty() || (!data->data().isEmpty() && (playVoice || playMusic || playVideo || playAnimation))) {
 		using State = Media::Player::State;
 		if (playVoice) {
@@ -1286,6 +1308,21 @@ bool DocumentData::hasRemoteLocation() const {
 	return (_dc != 0 && _access != 0);
 }
 
+auto DocumentData::createStreamingLoader(Data::FileOrigin origin) const
+-> std::unique_ptr<Media::Streaming::Loader> {
+	return hasRemoteLocation()
+		? std::make_unique<Media::Streaming::LoaderMtproto>(
+			&session().api(),
+			_dc,
+			MTP_inputDocumentFileLocation(
+				MTP_long(id),
+				MTP_long(_access),
+				MTP_bytes(_fileReference)),
+			size,
+			origin)
+		: nullptr;
+}
+
 bool DocumentData::hasWebLocation() const {
 	return _urlLocation.dc() != 0 && _urlLocation.accessHash() != 0;
 }