1 files changed, 85 insertions, 20 deletions

diff --git a/hypervideo_dl/downloader/__init__.py b/hypervideo_dl/downloader/__init__.py
index 2e485df..2449c74 100644
--- a/hypervideo_dl/downloader/__init__.py
+++ b/hypervideo_dl/downloader/__init__.py
@@ -1,24 +1,47 @@
 from __future__ import unicode_literals
 
+from ..compat import compat_str
+from ..utils import (
+    determine_protocol,
+    NO_DEFAULT
+)
+
+
+def get_suitable_downloader(info_dict, params={}, default=NO_DEFAULT, protocol=None, to_stdout=False):
+    info_dict['protocol'] = determine_protocol(info_dict)
+    info_copy = info_dict.copy()
+    info_copy['to_stdout'] = to_stdout
+
+    downloaders = [_get_suitable_downloader(info_copy, proto, params, default)
+                   for proto in (protocol or info_copy['protocol']).split('+')]
+    if set(downloaders) == {FFmpegFD} and FFmpegFD.can_merge_formats(info_copy, params):
+        return FFmpegFD
+    elif len(downloaders) == 1:
+        return downloaders[0]
+    return None
+
+
+# Some of these require get_suitable_downloader
 from .common import FileDownloader
+from .dash import DashSegmentsFD
 from .f4m import F4mFD
 from .hls import HlsFD
 from .http import HttpFD
 from .rtmp import RtmpFD
-from .dash import DashSegmentsFD
 from .rtsp import RtspFD
 from .ism import IsmFD
+from .mhtml import MhtmlFD
+from .niconico import NiconicoDmcFD
+from .websocket import WebSocketFragmentFD
+from .youtube_live_chat import YoutubeLiveChatFD
 from .external import (
     get_external_downloader,
     FFmpegFD,
 )
 
-from ..utils import (
-    determine_protocol,
-)
-
 PROTOCOL_MAP = {
     'rtmp': RtmpFD,
+    'rtmp_ffmpeg': FFmpegFD,
     'm3u8_native': HlsFD,
     'm3u8': FFmpegFD,
     'mms': RtspFD,
@@ -26,36 +49,78 @@ PROTOCOL_MAP = {
     'f4m': F4mFD,
     'http_dash_segments': DashSegmentsFD,
     'ism': IsmFD,
+    'mhtml': MhtmlFD,
+    'niconico_dmc': NiconicoDmcFD,
+    'websocket_frag': WebSocketFragmentFD,
+    'youtube_live_chat': YoutubeLiveChatFD,
+    'youtube_live_chat_replay': YoutubeLiveChatFD,
 }
 
 
-def get_suitable_downloader(info_dict, params={}):
+def shorten_protocol_name(proto, simplify=False):
+    short_protocol_names = {
+        'm3u8_native': 'm3u8_n',
+        'rtmp_ffmpeg': 'rtmp_f',
+        'http_dash_segments': 'dash',
+        'niconico_dmc': 'dmc',
+        'websocket_frag': 'WSfrag',
+    }
+    if simplify:
+        short_protocol_names.update({
+            'https': 'http',
+            'ftps': 'ftp',
+            'm3u8_native': 'm3u8',
+            'rtmp_ffmpeg': 'rtmp',
+            'm3u8_frag_urls': 'm3u8',
+            'dash_frag_urls': 'dash',
+        })
+    return short_protocol_names.get(proto, proto)
+
+
+def _get_suitable_downloader(info_dict, protocol, params, default):
     """Get the downloader class that can handle the info dict."""
-    protocol = determine_protocol(info_dict)
-    info_dict['protocol'] = protocol
+    if default is NO_DEFAULT:
+        default = HttpFD
 
     # if (info_dict.get('start_time') or info_dict.get('end_time')) and not info_dict.get('requested_formats') and FFmpegFD.can_download(info_dict):
     #     return FFmpegFD
 
-    external_downloader = params.get('external_downloader')
-    if external_downloader is not None:
+    info_dict['protocol'] = protocol
+    downloaders = params.get('external_downloader')
+    external_downloader = (
+        downloaders if isinstance(downloaders, compat_str) or downloaders is None
+        else downloaders.get(shorten_protocol_name(protocol, True), downloaders.get('default')))
+
+    if external_downloader is None:
+        if info_dict['to_stdout'] and FFmpegFD.can_merge_formats(info_dict, params):
+            return FFmpegFD
+    elif external_downloader.lower() != 'native':
         ed = get_external_downloader(external_downloader)
-        if ed.can_download(info_dict):
+        if ed.can_download(info_dict, external_downloader):
             return ed
 
-    if protocol.startswith('m3u8') and info_dict.get('is_live'):
-        return FFmpegFD
-
-    if protocol == 'm3u8' and params.get('hls_prefer_native') is True:
-        return HlsFD
+    if protocol == 'http_dash_segments':
+        if info_dict.get('is_live') and (external_downloader or '').lower() != 'native':
+            return FFmpegFD
 
-    if protocol == 'm3u8_native' and params.get('hls_prefer_native') is False:
-        return FFmpegFD
+    if protocol in ('m3u8', 'm3u8_native'):
+        if info_dict.get('is_live'):
+            return FFmpegFD
+        elif (external_downloader or '').lower() == 'native':
+            return HlsFD
+        elif get_suitable_downloader(
+                info_dict, params, None, protocol='m3u8_frag_urls', to_stdout=info_dict['to_stdout']):
+            return HlsFD
+        elif params.get('hls_prefer_native') is True:
+            return HlsFD
+        elif params.get('hls_prefer_native') is False:
+            return FFmpegFD
 
-    return PROTOCOL_MAP.get(protocol, HttpFD)
+    return PROTOCOL_MAP.get(protocol, default)
 
 
 __all__ = [
-    'get_suitable_downloader',
     'FileDownloader',
+    'get_suitable_downloader',
+    'shorten_protocol_name',
 ]