Backport #964 GStreamer backend cleanup (#979)

CHANGELOG.md

@@ -18,7 +18,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [playback] More robust dynamic limiter for very wide dynamic range (breaking)
 - [core] `Session`: `connect()` now returns the long-term credentials.
 - [core] `Session`: `connect()` now accespt a flag if the credentails should be stored via the cache.
-- [build] The MSRV is now 1.53.
+- [chore] The MSRV is now 1.53.
+- [playback] `gstreamer`: create own context, set correct states and use sync handler
 
 ### Added
 - [cache] Add `disable-credential-cache` flag (breaking).

Cargo.lock

@@ -2,6 +2,21 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "addr2line"
+version = "0.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9ecd88a8c8378ca913a680cd98f0f13ac67383d35993f86c90a70e3f137816b"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+
 [[package]]
 name = "aes"
 version = "0.6.0"
@@ -82,6 +97,12 @@ version = "1.0.44"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "61604a8f862e1d5c3229fdd78f8b02c68dcf73a4c4b05fd636d12240aaa242c1"
 
+[[package]]
+name = "array-init"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6945cc5422176fc5e602e590c2878d2c2acd9a4fe20a4baa7c28022521698ec6"
+
 [[package]]
 name = "async-trait"
 version = "0.1.51"
@@ -110,6 +131,21 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
+[[package]]
+name = "backtrace"
+version = "0.3.64"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e121dee8023ce33ab248d9ce1493df03c3b38a659b240096fcbd7048ff9c31f"
+dependencies = [
+ "addr2line",
+ "cc",
+ "cfg-if 1.0.0",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
+]
+
 [[package]]
 name = "base64"
 version = "0.13.0"
@@ -192,6 +228,15 @@ dependencies = [
  "nom",
 ]
 
+[[package]]
+name = "cfg-expr"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b412e83326147c2bb881f8b40edfbf9905b9b8abaebd0e47ca190ba62fda8f0e"
+dependencies = [
+ "smallvec",
+]
+
 [[package]]
 name = "cfg-if"
 version = "0.1.10"
@@ -421,6 +466,12 @@ dependencies = [
  "termcolor",
 ]
 
+[[package]]
+name = "fixedbitset"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37ab347416e802de484e4d03c7316c48f1ecb56574dfd4a46a80f173ce1de04d"
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -561,6 +612,12 @@ dependencies = [
  "wasi",
 ]
 
+[[package]]
+name = "gimli"
+version = "0.26.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78cc372d058dcf6d5ecd98510e7fbc9e5aec4d21de70f65fea8fecebcd881bd4"
+
 [[package]]
 name = "glib"
 version = "0.10.3"
@@ -573,13 +630,32 @@ dependencies = [
  "futures-executor",
  "futures-task",
  "futures-util",
- "glib-macros",
+ "glib-macros 0.10.1",
- "glib-sys",
+ "glib-sys 0.10.1",
- "gobject-sys",
+ "gobject-sys 0.10.0",
  "libc",
  "once_cell",
 ]
 
+[[package]]
+name = "glib"
+version = "0.14.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c515f1e62bf151ef6635f528d05b02c11506de986e43b34a5c920ef0b3796a4"
+dependencies = [
+ "bitflags",
+ "futures-channel",
+ "futures-core",
+ "futures-executor",
+ "futures-task",
+ "glib-macros 0.14.1",
+ "glib-sys 0.14.0",
+ "gobject-sys 0.14.0",
+ "libc",
+ "once_cell",
+ "smallvec",
+]
+
 [[package]]
 name = "glib-macros"
 version = "0.10.1"
@@ -588,7 +664,7 @@ checksum = "41486a26d1366a8032b160b59065a59fb528530a46a49f627e7048fb8c064039"
 dependencies = [
  "anyhow",
  "heck",
- "itertools",
+ "itertools 0.9.0",
  "proc-macro-crate 0.1.5",
  "proc-macro-error",
  "proc-macro2",
@@ -596,6 +672,21 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "glib-macros"
+version = "0.14.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2aad66361f66796bfc73f530c51ef123970eb895ffba991a234fcf7bea89e518"
+dependencies = [
+ "anyhow",
+ "heck",
+ "proc-macro-crate 1.1.0",
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "glib-sys"
 version = "0.10.1"
@@ -603,7 +694,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c7e9b997a66e9a23d073f2b1abb4dbfc3925e0b8952f67efd8d9b6e168e4cdc1"
 dependencies = [
  "libc",
- "system-deps",
+ "system-deps 1.3.2",
+]
+
+[[package]]
+name = "glib-sys"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1c1d60554a212445e2a858e42a0e48cece1bd57b311a19a9468f70376cf554ae"
+dependencies = [
+ "libc",
+ "system-deps 3.2.0",
 ]
 
 [[package]]
@@ -618,28 +719,38 @@ version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "952133b60c318a62bf82ee75b93acc7e84028a093e06b9e27981c2b6fe68218c"
 dependencies = [
- "glib-sys",
+ "glib-sys 0.10.1",
  "libc",
- "system-deps",
+ "system-deps 1.3.2",
+]
+
+[[package]]
+name = "gobject-sys"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa92cae29759dae34ab5921d73fff5ad54b3d794ab842c117e36cafc7994c3f5"
+dependencies = [
+ "glib-sys 0.14.0",
+ "libc",
+ "system-deps 3.2.0",
 ]
 
 [[package]]
 name = "gstreamer"
-version = "0.16.7"
+version = "0.17.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ff5d0f7ff308ae37e6eb47b6ded17785bdea06e438a708cd09e0288c1862f33"
+checksum = "c6a255f142048ba2c4a4dce39106db1965abe355d23f4b5335edea43a553faa4"
 dependencies = [
  "bitflags",
  "cfg-if 1.0.0",
  "futures-channel",
  "futures-core",
  "futures-util",
- "glib",
+ "glib 0.14.8",
- "glib-sys",
- "gobject-sys",
  "gstreamer-sys",
  "libc",
  "muldiv",
+ "num-integer",
  "num-rational",
  "once_cell",
  "paste",
@@ -649,76 +760,102 @@ dependencies = [
 
 [[package]]
 name = "gstreamer-app"
-version = "0.16.5"
+version = "0.17.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc80888271338c3ede875d8cafc452eb207476ff5539dcbe0018a8f5b827af0e"
+checksum = "f73b8d33b1bbe9f22d0cf56661a1d2a2c9a0e099ea10e5f1f347be5038f5c043"
 dependencies = [
  "bitflags",
  "futures-core",
  "futures-sink",
- "glib",
+ "glib 0.14.8",
- "glib-sys",
- "gobject-sys",
  "gstreamer",
  "gstreamer-app-sys",
  "gstreamer-base",
- "gstreamer-sys",
  "libc",
  "once_cell",
 ]
 
 [[package]]
 name = "gstreamer-app-sys"
-version = "0.9.1"
+version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "813f64275c9e7b33b828b9efcf9dfa64b95996766d4de996e84363ac65b87e3d"
+checksum = "41865cfb8a5ddfa1161734a0d068dcd4689da852be0910b40484206408cfeafa"
 dependencies = [
- "glib-sys",
+ "glib-sys 0.14.0",
  "gstreamer-base-sys",
  "gstreamer-sys",
  "libc",
- "system-deps",
+ "system-deps 3.2.0",
+]
+
+[[package]]
+name = "gstreamer-audio"
+version = "0.17.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "420b6bcb1759231f01172751da094e7afa5cd9edf40bee7475f5bc86df433c57"
+dependencies = [
+ "array-init",
+ "bitflags",
+ "cfg-if 1.0.0",
+ "glib 0.14.8",
+ "gstreamer",
+ "gstreamer-audio-sys",
+ "gstreamer-base",
+ "libc",
+ "once_cell",
+]
+
+[[package]]
+name = "gstreamer-audio-sys"
+version = "0.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d066ddfd05f63836f35ac4a5830d5bb2f7f3d6c33c870e9b15c667d20f65d7f6"
+dependencies = [
+ "glib-sys 0.14.0",
+ "gobject-sys 0.14.0",
+ "gstreamer-base-sys",
+ "gstreamer-sys",
+ "libc",
+ "system-deps 3.2.0",
 ]
 
 [[package]]
 name = "gstreamer-base"
-version = "0.16.5"
+version = "0.17.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bafd01c56f59cb10f4b5a10f97bb4bdf8c2b2784ae5b04da7e2d400cf6e6afcf"
+checksum = "2c0c1d8c62eb5d08fb80173609f2eea71d385393363146e4e78107facbd67715"
 dependencies = [
  "bitflags",
- "glib",
+ "cfg-if 1.0.0",
- "glib-sys",
+ "glib 0.14.8",
- "gobject-sys",
  "gstreamer",
  "gstreamer-base-sys",
- "gstreamer-sys",
  "libc",
 ]
 
 [[package]]
 name = "gstreamer-base-sys"
-version = "0.9.1"
+version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4b7b6dc2d6e160a1ae28612f602bd500b3fa474ce90bf6bb2f08072682beef5"
+checksum = "28169a7b58edb93ad8ac766f0fa12dcd36a2af4257a97ee10194c7103baf3e27"
 dependencies = [
- "glib-sys",
+ "glib-sys 0.14.0",
- "gobject-sys",
+ "gobject-sys 0.14.0",
  "gstreamer-sys",
  "libc",
- "system-deps",
+ "system-deps 3.2.0",
 ]
 
 [[package]]
 name = "gstreamer-sys"
-version = "0.9.1"
+version = "0.17.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc1f154082d01af5718c5f8a8eb4f565a4ea5586ad8833a8fc2c2aa6844b601d"
+checksum = "a81704feeb3e8599913bdd1e738455c2991a01ff4a1780cb62200993e454cc3e"
 dependencies = [
- "glib-sys",
+ "glib-sys 0.14.0",
- "gobject-sys",
+ "gobject-sys 0.14.0",
  "libc",
- "system-deps",
+ "system-deps 3.2.0",
 ]
 
 [[package]]
@@ -941,6 +1078,15 @@ dependencies = [
  "either",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a9a9d19fa1e79b6215ff29b9d6880b706147f16e9b1dbb1e4e5947b5b02bc5e3"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "0.4.8"
@@ -1273,9 +1419,10 @@ dependencies = [
  "cpal",
  "futures-executor",
  "futures-util",
- "glib",
+ "glib 0.10.3",
  "gstreamer",
  "gstreamer-app",
+ "gstreamer-audio",
  "jack",
  "lewton",
  "libpulse-binding",
@@ -1285,6 +1432,7 @@ dependencies = [
  "librespot-metadata",
  "log",
  "ogg",
+ "parking_lot",
  "portaudio-rs",
  "rand",
  "rand_distr",
@@ -1356,6 +1504,16 @@ version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2a60c7ce501c71e03a9c9c0d35b861413ae925bd979cc7a4e30d060069aaac8d"
 
+[[package]]
+name = "miniz_oxide"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a92518e98c078586bc6c934028adcca4c92a53d6a958196de835170a01d84e4b"
+dependencies = [
+ "adler",
+ "autocfg",
+]
+
 [[package]]
 name = "mio"
 version = "0.7.14"
@@ -1380,9 +1538,9 @@ dependencies = [
 
 [[package]]
 name = "muldiv"
-version = "0.2.1"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0419348c027fa7be448d2ae7ea0e4e04c2334c31dc4e74ab29f00a2a7ca69204"
+checksum = "b5136edda114182728ccdedb9f5eda882781f35fa6e80cc360af12a8932507f3"
 
 [[package]]
 name = "multimap"
@@ -1531,9 +1689,9 @@ dependencies = [
 
 [[package]]
 name = "num-rational"
-version = "0.3.2"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12ac428b1cb17fce6f731001d307d351ec70a6d202fc2e60f7d4c5e42d8f4f07"
+checksum = "d41702bd167c2df5520b384281bc111a4b5efcf7fbc4c9c222c815b07e0a6a6a"
 dependencies = [
  "autocfg",
  "num-integer",
@@ -1582,6 +1740,15 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "object"
+version = "0.27.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67ac1d3f9a1d3616fd9a60c8d74296f22406a238b6a72f5cc1e6f314df4ffbf9"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "oboe"
 version = "0.4.4"
@@ -1643,11 +1810,14 @@ version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d76e8e1493bcac0d2766c42737f34458f1c8c50c0d23bcb24ea953affb273216"
 dependencies = [
+ "backtrace",
  "cfg-if 1.0.0",
  "instant",
  "libc",
+ "petgraph",
  "redox_syscall",
  "smallvec",
+ "thread-id",
  "winapi",
 ]
 
@@ -1679,6 +1849,16 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 
+[[package]]
+name = "petgraph"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "467d164a6de56270bd7c4d070df81d07beace25012d5103ced4e9ff08d6afdb7"
+dependencies = [
+ "fixedbitset",
+ "indexmap",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.7"
@@ -1942,6 +2122,12 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "rustc-demangle"
+version = "0.1.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ef03e0a2b150c7a90d01faf6254c9c48a41e95fb2a8c2ac1c6f0d2b9aefc342"
+
 [[package]]
 name = "rustc-hash"
 version = "1.1.0"
@@ -1998,7 +2184,7 @@ checksum = "41a29aa21f175b5a41a6e26da572d5e5d1ee5660d35f9f9d0913e8a802098f74"
 dependencies = [
  "cfg-if 0.1.10",
  "libc",
- "version-compare",
+ "version-compare 0.0.10",
 ]
 
 [[package]]
@@ -2102,9 +2288,9 @@ checksum = "9def91fd1e018fe007022791f865d0ccc9b3a0d5001e01aabb8b40e46000afb5"
 
 [[package]]
 name = "smallvec"
-version = "1.7.0"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ecab6c735a6bb4139c0caafd0cc3635748bbb3acf4550e8138122099251f309"
+checksum = "f2dd574626839106c320a323308629dcb1acfc96e32a8cba364ddc61ac23ee83"
 
 [[package]]
 name = "socket2"
@@ -2134,6 +2320,12 @@ version = "0.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57bd81eb48f4c437cadc685403cad539345bf703d78e63707418431cecd4522b"
 
+[[package]]
+name = "strum"
+version = "0.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aaf86bbcfd1fa9670b7a129f64fc0c9fcbbfe4f1bc4210e9e98fe71ffc12cde2"
+
 [[package]]
 name = "strum_macros"
 version = "0.18.0"
@@ -2146,6 +2338,18 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "strum_macros"
+version = "0.21.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d06aaeeee809dbc59eb4556183dd927df67db1540de5be8d3ec0b6636358a5ec"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "subtle"
 version = "2.4.1"
@@ -2183,11 +2387,29 @@ checksum = "0f3ecc17269a19353b3558b313bba738b25d82993e30d62a18406a24aba4649b"
 dependencies = [
  "heck",
  "pkg-config",
- "strum",
+ "strum 0.18.0",
- "strum_macros",
+ "strum_macros 0.18.0",
  "thiserror",
  "toml",
- "version-compare",
+ "version-compare 0.0.10",
+]
+
+[[package]]
+name = "system-deps"
+version = "3.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "480c269f870722b3b08d2f13053ce0c2ab722839f472863c3e2d61ff3a1c2fa6"
+dependencies = [
+ "anyhow",
+ "cfg-expr",
+ "heck",
+ "itertools 0.10.3",
+ "pkg-config",
+ "strum 0.21.0",
+ "strum_macros 0.21.1",
+ "thiserror",
+ "toml",
+ "version-compare 0.0.11",
 ]
 
 [[package]]
@@ -2233,6 +2455,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "thread-id"
+version = "4.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5fdfe0627923f7411a43ec9ec9c39c3a9b4151be313e0922042581fb6c9b717f"
+dependencies = [
+ "libc",
+ "redox_syscall",
+ "winapi",
+]
+
 [[package]]
 name = "time"
 version = "0.1.43"
@@ -2271,6 +2504,7 @@ dependencies = [
  "mio",
  "num_cpus",
  "once_cell",
+ "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
  "tokio-macros",
@@ -2377,9 +2611,9 @@ dependencies = [
 
 [[package]]
 name = "unicode-segmentation"
-version = "1.8.0"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8895849a949e7845e06bd6dc1aa51731a103c42707010a5b591c0038fb73385b"
+checksum = "7e8820f5d777f6224dc4be3632222971ac30164d4a258d595640799554ebfd99"
 
 [[package]]
 name = "unicode-width"
@@ -2431,6 +2665,12 @@ version = "0.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d63556a25bae6ea31b52e640d7c41d1ab27faba4ccb600013837a3d0b3994ca1"
 
+[[package]]
+name = "version-compare"
+version = "0.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1c18c859eead79d8b95d09e4678566e8d70105c4e7b251f707a03df32442661b"
+
 [[package]]
 name = "version_check"
 version = "0.9.3"

playback/Cargo.toml

@@ -21,9 +21,10 @@ version = "0.3.1"
 futures-executor = "0.3"
 futures-util = { version = "0.3", default_features = false, features = ["alloc"] }
 log = "0.4"
+parking_lot = { version = "0.11", features = ["deadlock_detection"] }
 byteorder = "1.4"
 shell-words = "1.0.0"
-tokio = { version = "1", features = ["sync"] }
+tokio = { version = "1", features = ["sync", "parking_lot"] }
 zerocopy = { version = "0.3" }
 thiserror = { version = "1" }
 
@@ -34,8 +35,9 @@ libpulse-binding        = { version = "2", optional = true, default-features = f
 libpulse-simple-binding = { version = "2", optional = true, default-features = false }
 jack            = { version = "0.7", optional = true }
 sdl2            = { version = "0.34.3", optional = true }
-gstreamer       = { version = "0.16", optional = true }
+gstreamer       = { version = "0.17", optional = true }
-gstreamer-app   = { version = "0.16", optional = true }
+gstreamer-app   = { version = "0.17", optional = true }
+gstreamer-audio = { version = "0.17", optional = true }
 glib            = { version = "0.10", optional = true }
 
 # Rodio dependencies
@@ -58,4 +60,4 @@ jackaudio-backend = ["jack"]
 rodio-backend = ["rodio", "cpal"]
 rodiojack-backend = ["rodio", "cpal/jack"]
 sdl-backend = ["sdl2"]
-gstreamer-backend = ["gstreamer", "gstreamer-app", "glib"]
+gstreamer-backend = ["gstreamer", "gstreamer-app", "gstreamer-audio", "glib"]

playback/src/audio_backend/gstreamer.rs

@@ -1,23 +1,28 @@
-use super::{Open, Sink, SinkAsBytes, SinkResult};
+use gstreamer::{
-use crate::config::AudioFormat;
+    event::{FlushStart, FlushStop},
-use crate::convert::Converter;
+    prelude::*,
-use crate::decoder::AudioPacket;
+    State,
-use crate::{NUM_CHANNELS, SAMPLE_RATE};
+};
 
 use gstreamer as gst;
 use gstreamer_app as gst_app;
+use gstreamer_audio as gst_audio;
 
-use gst::prelude::*;
+use parking_lot::Mutex;
-use zerocopy::AsBytes;
+use std::sync::Arc;
 
-use std::sync::mpsc::{sync_channel, SyncSender};
+use super::{Open, Sink, SinkAsBytes, SinkError, SinkResult};
-use std::thread;
+
+use crate::{
+    config::AudioFormat, convert::Converter, decoder::AudioPacket, NUM_CHANNELS, SAMPLE_RATE,
+};
 
-#[allow(dead_code)]
 pub struct GstreamerSink {
-    tx: SyncSender<Vec<u8>>,
+    appsrc: gst_app::AppSrc,
+    bufferpool: gst::BufferPool,
     pipeline: gst::Pipeline,
     format: AudioFormat,
+    async_error: Arc<Mutex<Option<String>>>,
 }
 
 impl Open for GstreamerSink {
@@ -25,117 +30,166 @@ impl Open for GstreamerSink {
         info!("Using GStreamer sink with format: {:?}", format);
         gst::init().expect("failed to init GStreamer!");
 
-        // GStreamer calls S24 and S24_3 different from the rest of the world
         let gst_format = match format {
-            AudioFormat::S24 => "S24_32".to_string(),
+            AudioFormat::F64 => gst_audio::AUDIO_FORMAT_F64,
-            AudioFormat::S24_3 => "S24".to_string(),
+            AudioFormat::F32 => gst_audio::AUDIO_FORMAT_F32,
-            _ => format!("{:?}", format),
+            AudioFormat::S32 => gst_audio::AUDIO_FORMAT_S32,
+            AudioFormat::S24 => gst_audio::AUDIO_FORMAT_S2432,
+            AudioFormat::S24_3 => gst_audio::AUDIO_FORMAT_S24,
+            AudioFormat::S16 => gst_audio::AUDIO_FORMAT_S16,
         };
+
+        let gst_info = gst_audio::AudioInfo::builder(gst_format, SAMPLE_RATE, NUM_CHANNELS as u32)
+            .build()
+            .expect("Failed to create GStreamer audio format");
+        let gst_caps = gst_info.to_caps().expect("Failed to create GStreamer caps");
+
         let sample_size = format.size();
-        let gst_bytes = 2048 * sample_size;
+        let gst_bytes = NUM_CHANNELS as usize * 2048 * sample_size;
 
-        #[cfg(target_endian = "little")]
+        let pipeline = gst::Pipeline::new(None);
-        const ENDIANNESS: &str = "LE";
+        let appsrc = gst::ElementFactory::make("appsrc", None)
-        #[cfg(target_endian = "big")]
+            .expect("Failed to create GStreamer appsrc element")
-        const ENDIANNESS: &str = "BE";
+            .downcast::<gst_app::AppSrc>()
-
-        let pipeline_str_preamble = format!(
-            "appsrc caps=\"audio/x-raw,format={}{},layout=interleaved,channels={},rate={}\" block=true max-bytes={} name=appsrc0 ",
-            gst_format, ENDIANNESS, NUM_CHANNELS, SAMPLE_RATE, gst_bytes
-        );
-        // no need to dither twice; use librespot dithering instead
-        let pipeline_str_rest = r#" ! audioconvert dithering=none ! autoaudiosink"#;
-        let pipeline_str: String = match device {
-            Some(x) => format!("{}{}", pipeline_str_preamble, x),
-            None => format!("{}{}", pipeline_str_preamble, pipeline_str_rest),
-        };
-        info!("Pipeline: {}", pipeline_str);
-
-        gst::init().unwrap();
-        let pipelinee = gst::parse_launch(&*pipeline_str).expect("Couldn't launch pipeline; likely a GStreamer issue or an error in the pipeline string you specified in the 'device' argument to librespot.");
-        let pipeline = pipelinee
-            .dynamic_cast::<gst::Pipeline>()
-            .expect("couldn't cast pipeline element at runtime!");
-        let bus = pipeline.get_bus().expect("couldn't get bus from pipeline");
-        let mainloop = glib::MainLoop::new(None, false);
-        let appsrce: gst::Element = pipeline
-            .get_by_name("appsrc0")
-            .expect("couldn't get appsrc from pipeline");
-        let appsrc: gst_app::AppSrc = appsrce
-            .dynamic_cast::<gst_app::AppSrc>()
             .expect("couldn't cast AppSrc element at runtime!");
+        appsrc.set_caps(Some(&gst_caps));
+        appsrc.set_max_bytes(gst_bytes as u64);
+        appsrc.set_block(true);
+
+        let sink = match device {
+            None => {
+                // no need to dither twice; use librespot dithering instead
+                gst::parse_bin_from_description(
+                    "audioconvert dithering=none ! audioresample ! autoaudiosink",
+                    true,
+                )
+                .expect("Failed to create default GStreamer sink")
+            }
+            Some(ref x) => gst::parse_bin_from_description(x, true)
+                .expect("Failed to create custom GStreamer sink"),
+        };
+        pipeline
+            .add(&appsrc)
+            .expect("Failed to add GStreamer appsrc to pipeline");
+        pipeline
+            .add(&sink)
+            .expect("Failed to add GStreamer sink to pipeline");
+        appsrc
+            .link(&sink)
+            .expect("Failed to link GStreamer source to sink");
+
+        let bus = pipeline.bus().expect("couldn't get bus from pipeline");
+
         let bufferpool = gst::BufferPool::new();
-        let appsrc_caps = appsrc.get_caps().expect("couldn't get appsrc caps");
+
-        let mut conf = bufferpool.get_config();
+        let mut conf = bufferpool.config();
-        conf.set_params(Some(&appsrc_caps), 4096 * sample_size as u32, 0, 0);
+        conf.set_params(Some(&gst_caps), gst_bytes as u32, 0, 0);
         bufferpool
             .set_config(conf)
             .expect("couldn't configure the buffer pool");
-        bufferpool
-            .set_active(true)
-            .expect("couldn't activate buffer pool");
 
-        let (tx, rx) = sync_channel::<Vec<u8>>(64 * sample_size);
+        let async_error = Arc::new(Mutex::new(None));
-        thread::spawn(move || {
+        let async_error_clone = async_error.clone();
-            for data in rx {
+
-                let buffer = bufferpool.acquire_buffer(None);
+        bus.set_sync_handler(move |_bus, msg| {
-                if let Ok(mut buffer) = buffer {
+            match msg.view() {
-                    let mutbuf = buffer.make_mut();
+                gst::MessageView::Eos(_) => {
-                    mutbuf.set_size(data.len());
+                    println!("gst signaled end of stream");
-                    mutbuf
+
-                        .copy_from_slice(0, data.as_bytes())
+                    let mut async_error_storage = async_error_clone.lock();
-                        .expect("Failed to copy from slice");
+                    *async_error_storage = Some(String::from("gst signaled end of stream"));
-                    let _eat = appsrc.push_buffer(buffer);
                 }
+                gst::MessageView::Error(err) => {
+                    println!(
+                        "Error from {:?}: {} ({:?})",
+                        err.src().map(|s| s.path_string()),
+                        err.error(),
+                        err.debug()
+                    );
+
+                    let mut async_error_storage = async_error_clone.lock();
+                    *async_error_storage = Some(format!(
+                        "Error from {:?}: {} ({:?})",
+                        err.src().map(|s| s.path_string()),
+                        err.error(),
+                        err.debug()
+                    ));
+                }
+                _ => (),
             }
-        });
 
-        thread::spawn(move || {
+            gst::BusSyncReply::Drop
-            let thread_mainloop = mainloop;
-            let watch_mainloop = thread_mainloop.clone();
-            bus.add_watch(move |_, msg| {
-                match msg.view() {
-                    gst::MessageView::Eos(..) => watch_mainloop.quit(),
-                    gst::MessageView::Error(err) => {
-                        println!(
-                            "Error from {:?}: {} ({:?})",
-                            err.get_src().map(|s| s.get_path_string()),
-                            err.get_error(),
-                            err.get_debug()
-                        );
-                        watch_mainloop.quit();
-                    }
-                    _ => (),
-                };
-
-                glib::Continue(true)
-            })
-            .expect("failed to add bus watch");
-            thread_mainloop.run();
         });
 
         pipeline
-            .set_state(gst::State::Playing)
+            .set_state(State::Ready)
-            .expect("unable to set the pipeline to the `Playing` state");
+            .expect("unable to set the pipeline to the `Ready` state");
 
         Self {
-            tx,
+            appsrc,
+            bufferpool,
             pipeline,
             format,
+            async_error,
         }
     }
 }
 
 impl Sink for GstreamerSink {
+    fn start(&mut self) -> SinkResult<()> {
+        *self.async_error.lock() = None;
+        self.appsrc.send_event(FlushStop::new(true));
+        self.bufferpool
+            .set_active(true)
+            .map_err(|e| SinkError::OnWrite(e.to_string()))?;
+        self.pipeline
+            .set_state(State::Playing)
+            .map_err(|e| SinkError::OnWrite(e.to_string()))?;
+        Ok(())
+    }
+
+    fn stop(&mut self) -> SinkResult<()> {
+        *self.async_error.lock() = None;
+        self.appsrc.send_event(FlushStart::new());
+        self.pipeline
+            .set_state(State::Paused)
+            .map_err(|e| SinkError::OnWrite(e.to_string()))?;
+        self.bufferpool
+            .set_active(false)
+            .map_err(|e| SinkError::OnWrite(e.to_string()))?;
+        Ok(())
+    }
+
     sink_as_bytes!();
 }
 
+impl Drop for GstreamerSink {
+    fn drop(&mut self) {
+        let _ = self.pipeline.set_state(State::Null);
+    }
+}
+
 impl SinkAsBytes for GstreamerSink {
     fn write_bytes(&mut self, data: &[u8]) -> SinkResult<()> {
-        // Copy expensively (in to_vec()) to avoid thread synchronization
+        if let Some(async_error) = &*self.async_error.lock() {
-        self.tx
+            return Err(SinkError::OnWrite(async_error.to_string()));
-            .send(data.to_vec())
+        }
-            .expect("tx send failed in write function");
+
+        let mut buffer = self
+            .bufferpool
+            .acquire_buffer(None)
+            .map_err(|e| SinkError::OnWrite(e.to_string()))?;
+
+        let mutbuf = buffer.make_mut();
+        mutbuf.set_size(data.len());
+        mutbuf
+            .copy_from_slice(0, data)
+            .map_err(|e| SinkError::OnWrite(e.to_string()))?;
+
+        self.appsrc
+            .push_buffer(buffer)
+            .map_err(|e| SinkError::OnWrite(e.to_string()))?;
+
         Ok(())
     }
 }