153 Commits

Author SHA1 Message Date
dan sinclair
fc5c5ab60b [hlsl-writer] Emit specialization variables
This CL adds specialization to the HLSL backend. The specialization is
emulated using defined preprocessor macros.

Bug: tint:154
Change-Id: I73ab42360558967eee9a0da6bbe74d513fe4cc57
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/29720
Commit-Queue: David Neto <dneto@google.com>
Reviewed-by: David Neto <dneto@google.com>
2020-10-08 16:22:45 +00:00
dan sinclair
94b7c66858 [msl-writer][hlsl-writer] Add countOneBits and reverseBits
This Cl adds countOneBits and reverseBits intrinsic support to the MSL
and HLSL backends.

Bug: tint:250
Change-Id: Idb572da32e9c10767a27326cacf58aafef44a77a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/29401
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
2020-10-05 19:46:16 +00:00
dan sinclair
b2a0c8aee7 [msl-writer][hlsl-writer] Remove space between builtin and (.
The builting CL accidentally inserted indenting between the name of the
builtin and the opening paren. This CL removes the extraneous spacing.

Change-Id: If684ec6f2fb4bf13b559c16b246f57f7975d019d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28944
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2020-09-24 15:12:55 +00:00
dan sinclair
3c02592718 Remove cast operator.
This CL removes the cast operator and converts the tests over to using
type constructors.

Bug: tint:241
Change-Id: I2526acb61f5624b2e1c068612a2ddcc748c92aed
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28860
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2020-09-24 14:38:44 +00:00
dan sinclair
a7d498e060 Rename 'as' to 'bitcast'
This CL updates Tint to use 'bitcast' instead of 'as' for the OpBitcast
conversions.

Bug: tint:241
Change-Id: I53a80de10421b2d9cc009527eebe5ff07e1285c2
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28801
Commit-Queue: David Neto <dneto@google.com>
Reviewed-by: David Neto <dneto@google.com>
2020-09-22 22:07:13 +00:00
dan sinclair
b4fee2f824 Update builtin methods.
This CL removes the import mechanism, the identifier paths and updates
all of the standard library methods to be builtins.

Bug: tint:242
Change-Id: If09b98a155ae49ced3986ba2c9b517a060693006
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28720
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2020-09-22 19:42:13 +00:00
dan sinclair
5f8126271d Remove EntryPoint.
This CL removes the EntryPoint node and transitions everything to the
stage decoration.

Change-Id: Ib2840155905c8fa60ff35870f0c4b6705efb73ff
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28705
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
Reviewed-by: Sarah Mashayekhi <sarahmashay@google.com>
2020-09-22 14:53:03 +00:00
dan sinclair
f91b9664e7 [hlsl-writer] Emit function decoration stage
This CL updates the hlsl writer to emit stage decorations.

Change-Id: Ic9ae9fbd47537f141949e27c876d37e6d4dcd97d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28704
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
2020-09-22 13:47:32 +00:00
dan sinclair
d05f93fd8e [wgsl-reader] Add workgroup_size parsing
This CL adds parsing of the `workgroup_size` function decoration.

Change-Id: Ia90efc2c014ac0e1614429280cc903d30cf8171d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28663
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: Sarah Mashayekhi <sarahmashay@google.com>
2020-09-21 00:37:08 +00:00
dan sinclair
643827967e [ast][spirv-writer][hlsl-writer][wgsl-writer] Add workgroup_size decoration
This CL adds the workgroup_size decoration to functions and emits as
needed from the various backends.

Change-Id: Ifffde239e68047f6419c6980eca70c4efa9822c0
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28662
Reviewed-by: Sarah Mashayekhi <sarahmashay@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
2020-09-21 00:28:58 +00:00
dan sinclair
17b2b246c1 [hlsl-writer] Simplify generated logical and/or expressions.
This Cl simplifes the generated code for logical and/or expressions to
assign the LHS and RHS directly instead of using if statements.

Bug: tint:192
Change-Id: I358e07007510cf8df151a100fda678c1c299cf4f
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/28040
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-09-02 15:13:25 +00:00
dan sinclair
2b5c9b23af [hlsl-writer] Simplify logical and/or code.
This CL unifies the logical and/or HLSL code as it was mostly duplicate
code.

Bug: tint:192
Change-Id: Ied050afb0b054a9ccda1c8896edabf78deaa3709
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27921
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-09-02 15:09:55 +00:00
dan sinclair
b39c77e370 [hlsl-writer] Emit LogicalAnd and LogicalOr operations
This Cl emits the required code to handle LogicalAnd and LogicalOr short
circuting in HLSL.

Bug: tint:192
Change-Id: I30a88c207f7864e0a3c856d2dae1420c7ff35eb4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27782
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: David Neto <dneto@google.com>
2020-09-02 15:02:45 +00:00
dan sinclair
a0842b50b9 [hlsl-writer] Support pre stream in if/else statements.
This CL updates the if and else statement support to output the pre
streams in the proper places.

Bug: tint:192
Change-Id: If217de7f838fc033823987e20ba7efc5cd6108ff
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27781
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-09-02 14:29:05 +00:00
dan sinclair
b95fc538ed [hlsl-writer] Emit pre strings
This Cl updates the various statements to emit any pre strings which are
generated when emitting the statements.

Bug: tint:192
Change-Id: Ieb2e621a500c5d91a0b6a2938eabe8e2ffdd11d1
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27800
Commit-Queue: David Neto <dneto@google.com>
Reviewed-by: David Neto <dneto@google.com>
2020-09-02 14:21:05 +00:00
dan sinclair
ddb05a3679 [hlsl-writer] Update all expressions to take a pre stream.
This Cl updates all of the expression methods to accept a pre stream.
The prestream is used to output code _before_ the statement which is
executing the expression. This will allow for unwrapping logical and and
or expressions and emitting them prior to their expression.

Bug: tint:192
Change-Id: Ifb24e7b8964948a3893185710f17177aaec2a2c9
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27780
Commit-Queue: David Neto <dneto@google.com>
Reviewed-by: David Neto <dneto@google.com>
2020-09-02 14:19:45 +00:00
dan sinclair
764110d675 [msl-writer][hlsl-writer] Pull loop variables out with continuing.
If there is a continuing block we pull the variables declared in the
loop up into the scope outside the loop. This allows those variables to
be used in the continuing block.

We pull out all variables instead of detecting ones which are only used
in continuing as that's easier and still correct.

Bug: tint:187, tint:186
Change-Id: I1de0e36111a236ff04a323cf9777bc79e67afa77
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27620
Commit-Queue: David Neto <dneto@google.com>
Reviewed-by: Sarah Mashayekhi <sarahmashay@google.com>
Reviewed-by: David Neto <dneto@google.com>
2020-08-31 14:15:51 +00:00
dan sinclair
663be30b55 [hlsl-writer] Support matrices in storage buffers.
This CL adds the needed code to load matrix data from a storage buffer.

Bug: tint:7
Change-Id: I850b03adc7fa957b7babbad40d07ec3544b0617f
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27442
Commit-Queue: David Neto <dneto@google.com>
Reviewed-by: David Neto <dneto@google.com>
Reviewed-by: Sarah Mashayekhi <sarahmashay@google.com>
2020-08-26 19:55:46 +00:00
dan sinclair
fea2636945 [hlsl-writer] Emit numthreads for compute shaders.
This CL adds the numthreads annotation when emitting compute shaders.

Bug: tint:7
Change-Id: Ie0f47adfca0a0684f701f280958163b3da0019b4
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27480
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-08-26 19:24:26 +00:00
dan sinclair
42b0e2d5af [hlsl-writer] Emit zero matrix values.
This CL extends the zero emission to support matrices.

Bug: tint:7
Change-Id: I7e39a68c83edb096fc4b365c66539e8a8b7cb1db
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27443
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: Sarah Mashayekhi <sarahmashay@google.com>
Reviewed-by: David Neto <dneto@google.com>
2020-08-26 19:24:16 +00:00
dan sinclair
04746d930d [hlsl-writer] Extract storage buffer index generation.
This CL extracts the index string for a storage buffer access.

Bug: tint:7
Change-Id: Ibc0d7dd5b532bbd6141cce4a82495732452d1414
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27441
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: Sarah Mashayekhi <sarahmashay@google.com>
Reviewed-by: David Neto <dneto@google.com>
2020-08-26 19:22:56 +00:00
dan sinclair
df503f0e85 [hlsl-writer] Refactor output emission.
This CL updates the HLSL backend to take the output stream as a
parameter. This is needed because there are cases where we have to
generate the resulting stream out of order. This will allow that to
happen.

Bug: tint:7
Change-Id: Id1877a07e536a84da0555f207d1030588d44c034
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27440
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-08-26 19:05:46 +00:00
dan sinclair
bdb86723e8 [hlsl-writer] StorageBuffer support.
This Cl adds support for storage buffers to the HLSL backend.

Bug: tint:7
Change-Id: I7adb655de8ccfcb6771fa661ff205c543b4efe66
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27001
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
2020-08-25 21:22:37 +00:00
dan sinclair
d38df397e3 [hlsl-writer] Add support for import statements.
This Cl adds support for imported methods to the HLSL backend.

Bug: tint:7
Change-Id: Ib906542915670dcc916d48d9e5d64d7032ba829a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/26928
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-08-19 19:19:04 +00:00
dan sinclair
a1087ee513 [hlsl-writer] Generate intrinsics.
This CL adds the beginning of intrinsic emission for the HLSL backend.
The `outer_product`, `is_normal` and `select` intrinsics are currently
missing.

Bug: tint:7
Change-Id: Ice7a2b285eeb52041e3accd9751e127d6c5a0177
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/26927
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-08-19 19:17:54 +00:00
dan sinclair
3739a23f24 [hlsl-writer] Emit cast expressions.
This CL adds support for cast expressions to the HLSL backend.

Bug: tint:7
Change-Id: Ie7e180dc89abf137ab7d9b8790cc4206b3d5a672
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/26926
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-08-19 19:14:44 +00:00
dan sinclair
10585f0ac3 [hlsl-writer] Add tests for entry point data.
This CL adds the missing tests for emission of Entry Point Data
structures.

Bug: tint:7
Change-Id: If21071b07584780243ccd0629a92efa653640251
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/26925
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-08-19 19:04:54 +00:00
dan sinclair
6fdc77a966 [hlsl-writer] Emit module constants.
This CL adds emission of module constants to the HLSL backend.

Bug: tint:7
Change-Id: Iff07b0c0de7351f400dc35ca2ac07b44b22f8499
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/26924
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-08-19 19:03:24 +00:00
dan sinclair
1811639709 [hlsl-writer] Fix emission of struct aliases.
You can only typedef builtin types in HLSL. This Cl updates the struct
emission to emit named structs instead of typedef'd structs.

Bug: tint:7
Change-Id: I835b7f4d23bc225c730ef3f39c4572c043a58156
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/26921
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-08-19 19:00:21 +00:00
dan sinclair
bfaa6f8e57 [hlsl-writer] Emit uniform variables.
This CL adds emission of uniform storage class variables to the HLSL
backend. If the variable is a base type (float, int, etc) it is emitted
as a `cbuffer`. If the variable is a struct it will emit as a
`ConstantBuffer`.

Bug: tint:7
Change-Id: I9932d30df24c023c58d3a2ba4167bcb7ccb85dae
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/26920
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-08-19 18:57:09 +00:00
dan sinclair
7df4a845d9 [hlsl-writer] Add CallExpression.
This Cl adds support for call expressions into the HLSL backend.

Bug: tint:7
Change-Id: Id07e3d95e745aa016a658c3ec5d099f74f21a80e
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/26781
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: David Neto <dneto@google.com>
2020-08-19 17:44:45 +00:00
dan sinclair
34fd95ced0 [hlsl-writer] Add support for input locations and builtins.
This CL adds the beginning of support for input/output locations and
builtins in the HLSL backend.

Bug: tint:7
Change-Id: I8fb01707b50635a800b0d7317cf4a8f62f12cfca
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/26780
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: David Neto <dneto@google.com>
2020-08-19 17:37:25 +00:00
dan sinclair
be89a06b03 [hlsl-writer] Add function handling.
This CL adds the beginning of function handling to the HLSL generator.

Bug: tint:7
Change-Id: Id40109c342e7a128b1fe79a0c50967e1dbd125eb
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/26662
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: David Neto <dneto@google.com>
2020-08-19 17:32:25 +00:00
dan sinclair
8278f2c6f0 [hlsl-writer] Add loop support.
This CL adds support for the LoopStatement emission in HLSL.

Bug: tint:7
Change-Id: Ie42b24abff3a69c9cbfe3d3c8ab6fb9b1823e61d
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25849
Reviewed-by: David Neto <dneto@google.com>
2020-07-30 22:27:09 +00:00
dan sinclair
97bc4ad8d6 [hlsl-writer] Add if/else statements.
This CL adds if/else statement emission to the HLSL writer.

Bug: tint:7
Change-Id: Idd6e6d8c329ed270676fa0276474a68c715dd9eb
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25847
Reviewed-by: David Neto <dneto@google.com>
2020-07-30 22:26:55 +00:00
dan sinclair
cbe0668f9b [hlsl-writer] Emit variable declarations.
This CL adds variable declarations to the HLSL backend.

Bug: tint:7
Change-Id: I5c1e42ca26029f1595bf4f23b3b867a492ddacc1
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25846
Reviewed-by: David Neto <dneto@google.com>
2020-07-30 22:26:46 +00:00
dan sinclair
f961850988 [hlsl-writer] Add member accessor emission.
This CL adds emitting MemberAccessorExpressions to the HLSL backend.

Bug: tint:7
Change-Id: Ic6c99232e98322c8145700d5f1a3a8314cf60feb
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25844
Reviewed-by: David Neto <dneto@google.com>
2020-07-29 19:12:19 +00:00
dan sinclair
7cf1979667 [hlsl-writer] Add AsExpression to the HLSL backend.
This CL adds as casts to the HLSL backend.

Bug: tint:7
Change-Id: I599527d665a3ec1ab6cf80b4f550f7aee8fdf294
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25843
Reviewed-by: David Neto <dneto@google.com>
2020-07-29 19:11:15 +00:00
dan sinclair
d450a920d5 [hlsl-writer] Add BlockStatement support.
This CL adds support for BlockStatement to the HLSL backend.

Bug: tint:7
Change-Id: I953a1b85a05cd84e8e296d677204ae9b5a3ae669
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25860
Reviewed-by: David Neto <dneto@google.com>
2020-07-29 19:06:46 +00:00
dan sinclair
cda5af0fa2 [hlsl-writer] Emit discard.
This CL adds the discard statement to the HLSL writer.

Bug: tint:7, tint:166
Change-Id: I292e9b97a1246c9b79a9660ec229ff7855aeb2a9
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25842
Reviewed-by: David Neto <dneto@google.com>
2020-07-29 18:56:50 +00:00
dan sinclair
ec007b98c7 [hlsl-writer] Emit array accessors.
This CL adds array accessor expressions to the HLSL backend.

Bug: tint:7
Change-Id: I46d60f5d8ef74fee2a2f4da48c2d792969bfa365
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25820
Reviewed-by: David Neto <dneto@google.com>
2020-07-29 18:56:35 +00:00
dan sinclair
0e48082549 [hlsl-writer] Add alias type support.
This CL adds support for emitting type aliases to the HLSL backend.

Bug: tint:7
Change-Id: Ibd2c2d3bbe6c9a86033e379b4e1cb494259b4df2
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25800
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
2020-07-29 18:56:25 +00:00
dan sinclair
4a11b5600d [hlsl-writer] Add constructor emission.
This CL adds scalar and type constructor emission to the HLSL backend.

Bug: tint:7
Change-Id: I2b402b7eb66f266c3a111c9b07502ef17cc1a679
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25726
Reviewed-by: David Neto <dneto@google.com>
2020-07-29 18:50:18 +00:00
dan sinclair
8cce7cece8 [hlsl-writer] Add type emission.
This Cl adds the start of type emission to the HLSL backend.

Bug: tint:7
Change-Id: I403635080841c63382afe162ac80ae2be30b4faa
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25780
Reviewed-by: David Neto <dneto@google.com>
2020-07-29 18:30:44 +00:00
dan sinclair
7c2fa1e7bc Convert CaseStatement to use BlockStatement.
This CL converts the CaseStatement class to using a BlockStatement
internally. All usages have been updated execept for the two readers.

Bug: tint:130
Change-Id: Idb9114230f7d9eb0f2208af635316edb0a0e8f99
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25721
Reviewed-by: Sarah Mashayekhi <sarahmashay@google.com>
2020-07-27 15:25:00 +00:00
dan sinclair
a0b73e8aca [hlsl-writer] Add assignment statement.
This CL adds the assign statement emission to the HLSL backend.

Bug: tint:7
Change-Id: I3e46ac09170ea1af7444ae89267a82e1d1c42c52
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25224
Reviewed-by: David Neto <dneto@google.com>
2020-07-21 15:58:56 +00:00
dan sinclair
41aa1a1ed8 [hlsl-writer] Add switch statement support
This CL adds emission of switch statements to the HLSL backend.

Bug: tint:7
Change-Id: Ie6f41031878a1f5a945f9310429d28fb0e4a98c8
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25223
Reviewed-by: David Neto <dneto@google.com>
2020-07-21 15:58:50 +00:00
dan sinclair
557a0f8e63 [hlsl-writer] Emit case statements.
This CL adds emission of case statements to the HLSL backend.

Bug: tint:7
Change-Id: I5d0dd7ecfe4ef032a03777c29f3d0d00e584a93a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25222
Reviewed-by: David Neto <dneto@google.com>
2020-07-21 15:58:43 +00:00
dan sinclair
6dab73b5c6 [hlsl-writer] Emit unary operators.
This CL emits unary operators from the HLSL backend.

Bug: tint:7
Change-Id: I997d89d62d279fc7440ba6045c56e290ec7601c1
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25221
Reviewed-by: David Neto <dneto@google.com>
2020-07-21 15:58:36 +00:00
dan sinclair
abfdd22acc [hlsl-writer] Emit break, return and continue.
This CL updates the HLSL writer to emit break, return and continue
statements.

Bug: tint:7
Change-Id: I03eafc343e57e9e8d1efaf930023099d6f85fc57
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/25220
Reviewed-by: David Neto <dneto@google.com>
2020-07-21 15:58:29 +00:00