[ie/soundcloud] Add formats extractor-arg (#10004)

Authored by: bashonly

README.md

@@ -1841,6 +1841,9 @@ The following extractors use this feature:
 #### afreecatvlive
 * `cdn`: One or more CDN IDs to use with the API call for stream URLs, e.g. `gcp_cdn`, `gs_cdn_pc_app`, `gs_cdn_mobile_web`, `gs_cdn_pc_web`
 
+#### soundcloud
+* `formats`: Formats to request from the API. Requested values should be in the format of `{protocol}_{extension}` (omitting the bitrate), e.g. `hls_opus,http_aac`. The `*` character functions as a wildcard, e.g. `*_mp3`, and can passed by itself to request all formats. Known protocols include `http`, `hls` and `hls-aes`; known extensions include `aac`, `opus` and `mp3`. Original `download` formats are always extracted. Default is `http_aac,hls_aac,http_opus,hls_opus,http_mp3,hls_mp3`
+
 **Note**: These options may be changed/removed in the future without concern for backward compatibility
 
 <!-- MANPAGE: MOVE "INSTALLATION" SECTION HERE -->

yt_dlp/extractor/soundcloud.py

@@ -1,3 +1,4 @@
+import functools
 import itertools
 import json
 import re
@@ -12,6 +13,7 @@ from ..utils import (
     error_to_compat_str,
     float_or_none,
     int_or_none,
+    join_nonempty,
     mimetype2ext,
     parse_qs,
     str_or_none,
@@ -68,6 +70,16 @@ class SoundcloudBaseIE(InfoExtractor):
         'original': 0,
     }
 
+    _DEFAULT_FORMATS = ['http_aac', 'hls_aac', 'http_opus', 'hls_opus', 'http_mp3', 'hls_mp3']
+
+    @functools.cached_property
+    def _is_requested(self):
+        return re.compile(r'|'.join(set(
+            re.escape(pattern).replace(r'\*', r'.*') if pattern != 'default'
+            else '|'.join(map(re.escape, self._DEFAULT_FORMATS))
+            for pattern in self._configuration_arg('formats', ['default'], ie_key=SoundcloudIE)
+        ))).fullmatch
+
     def _store_client_id(self, client_id):
         self.cache.store('soundcloud', 'client_id', client_id)
 
@@ -216,7 +228,7 @@ class SoundcloudBaseIE(InfoExtractor):
             redirect_url = (self._download_json(download_url, track_id, fatal=False) or {}).get('redirectUri')
             if redirect_url:
                 urlh = self._request_webpage(
-                    HEADRequest(redirect_url), track_id, fatal=False)
+                    HEADRequest(redirect_url), track_id, 'Checking for original download format', fatal=False)
                 if urlh:
                     format_url = urlh.url
                     format_urls.add(format_url)
@@ -258,7 +270,7 @@ class SoundcloudBaseIE(InfoExtractor):
             abr = f.get('abr')
             if abr:
                 f['abr'] = int(abr)
-            if protocol == 'hls':
+            if protocol in ('hls', 'hls-aes'):
                 protocol = 'm3u8' if ext == 'aac' else 'm3u8_native'
             else:
                 protocol = 'http'
@@ -274,11 +286,32 @@ class SoundcloudBaseIE(InfoExtractor):
             if extract_flat:
                 break
             format_url = t['url']
-            stream = None
 
+            protocol = traverse_obj(t, ('format', 'protocol', {str}))
+            if protocol == 'progressive':
+                protocol = 'http'
+            if protocol != 'hls' and '/hls' in format_url:
+                protocol = 'hls'
+            if protocol == 'encrypted-hls' or '/encrypted-hls' in format_url:
+                protocol = 'hls-aes'
+
+            ext = None
+            if preset := traverse_obj(t, ('preset', {str_or_none})):
+                ext = preset.split('_')[0]
+            if ext not in KNOWN_EXTENSIONS:
+                ext = mimetype2ext(traverse_obj(t, ('format', 'mime_type', {str})))
+
+            identifier = join_nonempty(protocol, ext, delim='_')
+            if not self._is_requested(identifier):
+                self.write_debug(f'"{identifier}" is not a requested format, skipping')
+                continue
+
+            stream = None
             for retry in self.RetryManager(fatal=False):
                 try:
-                    stream = self._download_json(format_url, track_id, query=query, headers=self._HEADERS)
+                    stream = self._download_json(
+                        format_url, track_id, f'Downloading {identifier} format info JSON',
+                        query=query, headers=self._HEADERS)
                 except ExtractorError as e:
                     if isinstance(e.cause, HTTPError) and e.cause.status == 429:
                         self.report_warning(
@@ -289,27 +322,14 @@ class SoundcloudBaseIE(InfoExtractor):
                     else:
                         self.report_warning(e.msg)
 
-            if not isinstance(stream, dict):
-                continue
-            stream_url = url_or_none(stream.get('url'))
+            stream_url = traverse_obj(stream, ('url', {url_or_none}))
             if invalid_url(stream_url):
                 continue
             format_urls.add(stream_url)
-            stream_format = t.get('format') or {}
-            protocol = stream_format.get('protocol')
-            if protocol != 'hls' and '/hls' in format_url:
-                protocol = 'hls'
-            ext = None
-            preset = str_or_none(t.get('preset'))
-            if preset:
-                ext = preset.split('_')[0]
-            if ext not in KNOWN_EXTENSIONS:
-                ext = mimetype2ext(stream_format.get('mime_type'))
             add_format({
                 'url': stream_url,
                 'ext': ext,
-            }, 'http' if protocol == 'progressive' else protocol,
-                t.get('snipped') or '/preview/' in format_url)
+            }, protocol, t.get('snipped') or '/preview/' in format_url)
 
         for f in formats:
             f['vcodec'] = 'none'