Forward port plietar's WIP gstreamer backend.

Cargo.lock

@@ -532,6 +532,19 @@ name = "futures"
 version = "0.1.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "futures-channel"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "futures-core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "futures-core"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "futures-cpupool"
 version = "0.1.8"
@@ -541,6 +554,46 @@ dependencies = [
  "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "futures-executor"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "futures-core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-task 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-util 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "futures-macro"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "futures-task"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "futures-util"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "futures-core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-macro 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-task 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pin-utils 0.1.0-alpha.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-nested 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "gcc"
 version = "0.3.55"
@@ -571,11 +624,132 @@ dependencies = [
  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "glib"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-channel 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-executor 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-task 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-util 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "glib-sys"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "glob"
 version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "gobject-sys"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "glib-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
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+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "muldiv 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-rational 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "paste 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "gstreamer-app"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-app-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-base 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "gstreamer-app-sys"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "glib-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-base-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "gstreamer-base"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-base-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "gstreamer-base-sys"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "glib-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "gstreamer-sys"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "glib-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "hex"
 version = "0.3.2"
@@ -898,6 +1072,9 @@ dependencies = [
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "cpal 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gstreamer-app 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "jack 0.5.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "libpulse-sys 0.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -908,6 +1085,7 @@ dependencies = [
  "portaudio-rs 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rodio 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "sdl2 0.32.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "zerocopy 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1060,6 +1238,11 @@ dependencies = [
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "muldiv"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "multimap"
 version = "0.4.0"
@@ -1177,6 +1360,16 @@ dependencies = [
  "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "num-rational"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.8"
@@ -1245,6 +1438,26 @@ dependencies = [
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "paste"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "paste-impl 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "paste-impl"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "pbkdf2"
 version = "0.3.0"
@@ -1269,6 +1482,11 @@ name = "percent-encoding"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "pin-utils"
+version = "0.1.0-alpha.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "pkg-config"
 version = "0.3.15"
@@ -1298,6 +1516,21 @@ name = "ppv-lite86"
 version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "proc-macro-hack"
+version = "0.5.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "proc-macro-nested"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "proc-macro2"
 version = "0.2.3"
@@ -1314,6 +1547,14 @@ dependencies = [
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "proc-macro2"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "protobuf"
 version = "2.8.1"
@@ -1357,6 +1598,14 @@ dependencies = [
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 ]
 
+[[package]]
+name = "quote"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rand"
 version = "0.3.23"
@@ -1829,6 +2078,16 @@ dependencies = [
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "syn"
+version = "1.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "synstructure"
 version = "0.10.2"
@@ -2187,6 +2446,11 @@ name = "unicode-xid"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "unicode-xid"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "url"
 version = "1.7.2"
@@ -2356,6 +2620,25 @@ dependencies = [
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 ]
 
+[[package]]
+name = "zerocopy"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "zerocopy-derive 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
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+
+[[package]]
+name = "zerocopy-derive"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
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+"checksum gstreamer-base-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ba384f52174b3c586593fca32642680a9e67961fea9f4cd8419f678965023bed"
+"checksum gstreamer-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1d18da01b97d0ab5896acd5151e4c155acefd0e6c03c3dd24dd133ba054053db"
 "checksum hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "805026a5d0141ffc30abb3be3173848ad46a1b1664fe632428479619a3644d77"
 "checksum hmac 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5dcb5e64cda4c23119ab41ba960d1e170a774c8e4b9d9e6a9bc18aabf5e59695"
 "checksum httparse 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "cd179ae861f0c2e53da70d892f5f3029f9594be0c41dc5269cd371691b1dc2f9"
@@ -2462,6 +2760,7 @@ dependencies = [
 "checksum mio-uds 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)" = "966257a94e196b11bb43aca423754d87429960a768de9414f3691d6957abf125"
 "checksum miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f2f3b1cf331de6896aabf6e9d55dca90356cc9960cca7eaaf408a355ae919"
 "checksum miow 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "396aa0f2003d7df8395cb93e09871561ccc3e785f0acb369170e8cc74ddf9226"
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@@ -2474,6 +2773,7 @@ dependencies = [
 "checksum num-complex 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "fcb0cf31fb3ff77e6d2a6ebd6800df7fdcd106f2ad89113c9130bcd07f93dffc"
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@@ -2482,21 +2782,28 @@ dependencies = [
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 "checksum quote 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1eca14c727ad12702eb4b6bfb5a232287dcf8385cb8ca83a3eeaf6519c44c408"
 "checksum quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
+"checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
 "checksum rand 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)" = "64ac302d8f83c0c1974bf758f6b041c6c8ada916fbb44a609158ca8b064cc76c"
 "checksum rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "552840b97013b1a26992c11eac34bdd778e464601a4c2054b5f0bff7c6761293"
 "checksum rand 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c618c47cd3ebd209790115ab837de41425723956ad3ce2e6a7f09890947cacb9"
@@ -2555,6 +2862,7 @@ dependencies = [
 "checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
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 "checksum syn 0.15.42 (registry+https://github.com/rust-lang/crates.io-index)" = "eadc09306ca51a40555dd6fc2b415538e9e18bc9f870e47b1a524a79fe2dcf5e"
+"checksum syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)" = "dff0acdb207ae2fe6d5976617f887eb1e35a2ba52c13c7234c790960cdad9238"
 "checksum synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)" = "02353edf96d6e4dc81aea2d8490a7e9db177bf8acb0e951c24940bf866cb313f"
 "checksum take 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b157868d8ac1f56b64604539990685fa7611d8fa9e5476cf0c02cf34d32917c5"
 "checksum tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
@@ -2588,6 +2896,7 @@ dependencies = [
 "checksum unicode-normalization 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "141339a08b982d942be2ca06ff8b076563cbe223d1befd5450716790d44e2426"
 "checksum unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
+"checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 "checksum url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dd4e7c0d531266369519a4aa4f399d748bd37043b00bde1e4ff1f60a120b355a"
 "checksum utf8-ranges 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9d50aa7650df78abf942826607c62468ce18d9019673d4a2ebe1865dbb96ffde"
 "checksum uuid 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)" = "90dbc611eb48397705a6b0f6e917da23ae517e4d127123d2cf7674206627d32a"
@@ -2609,3 +2918,5 @@ dependencies = [
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 "checksum wincolor 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "561ed901ae465d6185fa7864d63fbd5720d0ef718366c9a4dc83cf6170d7e9ba"
 "checksum ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
+"checksum zerocopy 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "992b9b31f80fd4a167f903f879b8ca43d6716cc368ea01df90538baa2dd34056"
+"checksum zerocopy-derive 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b090467ecd0624026e8a6405d343ac7382592530d54881330b3fc8e400280fa5"

Cargo.toml

@@ -64,6 +64,7 @@ pulseaudio-backend = ["librespot-playback/pulseaudio-backend"]
 jackaudio-backend = ["librespot-playback/jackaudio-backend"]
 rodio-backend = ["librespot-playback/rodio-backend"]
 sdl-backend = ["librespot-playback/sdl-backend"]
+gstreamer-backend = ["librespot-playback/gstreamer-backend"]
 
 with-tremor = ["librespot-audio/with-tremor"]
 with-vorbis = ["librespot-audio/with-vorbis"]

playback/Cargo.toml

@@ -28,6 +28,10 @@ libc            = { version = "0.2", optional = true }
 rodio           = { version = "0.9", optional = true, default-features = false }
 cpal            = { version = "0.8", optional = true }
 sdl2            = { version = "0.32", optional = true }
+gstreamer       = { version = "0.15.0", optional = true }
+gstreamer-app   = { version = "0.15.0", optional = true }
+glib            = { version = "0.9.0", optional = true }
+zerocopy        = { version = "0.2.8", optional = true }
 
 [features]
 alsa-backend = ["alsa"]
@@ -36,3 +40,4 @@ pulseaudio-backend = ["libpulse-sys", "libc"]
 jackaudio-backend = ["jack"]
 rodio-backend = ["rodio", "cpal"]
 sdl-backend = ["sdl2"]
+gstreamer-backend = ["gstreamer", "gstreamer-app", "glib", "zerocopy"]

playback/src/audio_backend/gstreamer.rs

@@ -0,0 +1,129 @@
+use super::{Open, Sink};
+use std::{io, thread, time, process::exit};
+use std::sync::mpsc::{sync_channel, SyncSender};
+use gst::prelude::*;
+use gst::*;
+use gst_app::*;
+use glib::MainLoop;
+use zerocopy::*;
+
+pub struct GstreamerSink {
+    tx: SyncSender<Vec<i16>>,
+    pipeline: gst::Pipeline
+}
+
+impl Open for GstreamerSink {
+    fn open(device: Option<String>) -> GstreamerSink {
+        gst::init();
+        let pipeline_str_preamble = r#"appsrc caps="audio/x-raw,format=S16LE,layout=interleaved,channels=2,rate=44100" block=true max-bytes=4096 name=appsrc0 "#;
+        let pipeline_str_rest = r#" ! audioconvert ! autoaudiosink"#;
+        let pipeline_str : String = match device {
+            Some(x) => format!("{}{}", pipeline_str_preamble, x),
+            None => format!("{}{}", pipeline_str_preamble, pipeline_str_rest)
+        };
+
+        gst::init().unwrap();
+        let pipelinee = gst::parse_launch(&*pipeline_str).expect("New Pipeline error");
+        let pipeline = pipelinee.dynamic_cast::<gst::Pipeline>().expect("Couldnt cast pipeline element at runtime!");
+        let mut bus = pipeline.get_bus().expect("Couldn't get bus from pipeline");
+        let mut mainloop = glib::MainLoop::new(None, false);
+        let mut appsrce : gst::Element = pipeline.get_by_name("appsrc0").expect("Couldn't get appsrc from pipeline");
+        let mut appsrc : gst_app::AppSrc = appsrce.dynamic_cast::<gst_app::AppSrc>().expect("Couldnt cast AppSrc element at runtime!");
+        //let mut appsrc = gst_app::AppSrc::new_from_element(appsrc_element.to_element());
+        let bufferpool = gst::BufferPool::new();
+        let appsrc_caps = appsrc.get_caps().expect("get appsrc caps failed");
+        let mut conf = bufferpool.get_config();
+        conf.set_params(Some(&appsrc_caps), 2048 * 2, 0, 0);
+        if bufferpool.set_active(true).is_err(){
+            panic!("Couldn't activate buffer pool");
+        }
+
+        /*
+        thread::spawn(move || {
+        let bus_receiver = bus.receiver();
+            for message in bus_receiver.iter() {
+                match message.parse() {
+                    gst::message::StateChanged(x) =>
+                        println!("element `{}` state changed", message.src_name()),
+                    gst::message::Error(x) => {
+                        println!("error msg from element `{}`: {}, quitting", message.src_name(), error.message());
+                        break;
+                    },
+                    gst::message::Eos(ref _msg) => {
+                        println!("eos received; quitting");
+                        break;
+                    },
+                    _ =>
+                        println!("Pipe message: {} from {} at {}", message.type_name(), message.src_name(), message.timestamp())
+                }
+            }
+        });*/
+
+        let (tx, rx) = sync_channel::<Vec<i16>>(64);
+        thread::spawn(move || {
+            for data in rx {
+                let mut buffer = bufferpool.acquire_buffer(None).expect("acquire buffer");
+
+                //assert!(data.len() <= buffer.len::<i16>());
+                let mutbuf = buffer.make_mut();
+                mutbuf.set_size(data.len() * 2);
+                mutbuf.map_writable().unwrap().as_mut_slice().clone_from_slice(&data[..].as_bytes());
+
+                //buffer.set_live(true);
+                let res = appsrc.push_buffer(buffer).expect("Failed to push buffer");
+            }
+        });
+
+        thread::spawn(move || {
+            unsafe {
+                let thread_mainloop = mainloop;
+                let watch_mainloop = thread_mainloop.clone();
+                bus.add_watch(move |_, msg| {
+                    use gst::MessageView;
+                    match msg.view() {
+                        MessageView::Eos(..) => watch_mainloop.quit(),
+                        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();
+            }
+        });
+
+        GstreamerSink {
+            tx: tx,
+            pipeline: pipeline
+        }
+    }
+}
+
+impl Sink for GstreamerSink {
+    fn start(&mut self) -> io::Result<()> {
+        //self.pipeline.play();
+        self.pipeline.set_state(gst::State::Playing).expect("Unable to set the pipeline to the `Playing` state");
+        Ok(())
+    }
+    fn stop(&mut self) -> io::Result<()> {
+        //self.pipeline.pause();
+        self.pipeline.set_state(gst::State::Paused).expect("Unable to set the pipeline to the `Paused` state");
+        Ok(())
+    }
+    fn write(&mut self, data: &[i16]) -> io::Result<()> {
+        // Copy expensively to avoid thread synchronization
+        let data = data.to_vec();
+        self.tx.send(data).expect("tx send failed in write function");
+
+        Ok(())
+    }
+}

playback/src/audio_backend/mod.rs

@@ -34,6 +34,11 @@ mod jackaudio;
 #[cfg(feature = "jackaudio-backend")]
 use self::jackaudio::JackSink;
 
+#[cfg(feature = "gstreamer-backend")]
+mod gstreamer;
+#[cfg(feature = "gstreamer-backend")]
+use self::gstreamer::GstreamerSink;
+
 #[cfg(feature = "rodio-backend")]
 mod rodio;
 #[cfg(feature = "rodio-backend")]
@@ -55,6 +60,8 @@ pub const BACKENDS: &'static [(&'static str, fn(Option<String>) -> Box<Sink>)] =
     ("pulseaudio", mk_sink::<PulseAudioSink>),
     #[cfg(feature = "jackaudio-backend")]
     ("jackaudio", mk_sink::<JackSink>),
+    #[cfg(feature = "gstreamer-backend")]
+    ("gstreamer", mk_sink::<GstreamerSink>),
     #[cfg(feature = "rodio-backend")]
     ("rodio", mk_sink::<RodioSink>),
     #[cfg(feature = "sdl-backend")]

playback/src/lib.rs

@@ -16,6 +16,15 @@ extern crate libpulse_sys;
 #[cfg(feature = "jackaudio-backend")]
 extern crate jack;
 
+#[cfg(feature = "gstreamer-backend")]
+extern crate gstreamer as gst;
+#[cfg(feature = "gstreamer-backend")]
+extern crate gstreamer_app as gst_app;
+#[cfg(feature = "gstreamer-backend")]
+extern crate glib;
+#[cfg(feature = "gstreamer-backend")]
+extern crate zerocopy;
+
 #[cfg(feature = "sdl-backend")]
 extern crate sdl2;