Commit Graph

345 Commits

Author SHA1 Message Date
7eb914debb Fix incorrect comment
Review URL: https://codereview.webrtc.org/1524663004

Cr-Commit-Position: refs/heads/master@{#11036}
2015-12-15 22:20:29 +00:00
d7b7ae8bda Add encode/decode time tracing to audio_coding.
Also removes virtual from VideoDecoder::Decode and updated mocks and
tests accordingly to use VideoDecoder::DecodeInternal instead.

BUG=webrtc:5167
R=henrik.lundin@webrtc.org

Review URL: https://codereview.webrtc.org/1512483003 .

Cr-Commit-Position: refs/heads/master@{#10935}
2015-12-08 12:41:44 +00:00
3c652b6746 modules/audio_coding: Remove some codec include dirs
Also clean up some include_dir entries and update the few
references to them with absolute include paths instead.
Finally fixed a few lint errors and invalid header guards.

None of these are used downstream.

BUG=webrtc:5095
TESTED=git cl try -c --bot=android_compile_rel --bot=linux_compile_rel --bot=win_compile_rel --bot=mac_compile_rel --bot=ios_rel --bot=linux_gn_rel --bot=win_x64_gn_rel --bot=mac_x64_gn_rel --bot=android_gn_rel -m tryserver.webrtc
R=kwiberg@webrtc.org

Review URL: https://codereview.webrtc.org/1438663003 .

Cr-Commit-Position: refs/heads/master@{#10700}
2015-11-18 22:08:46 +00:00
9a7c838ec4 Adding stddef.h to opus_inst.h.
This is to prevent size_t from undefined. This does not happen in current WebRTC since the sources that opus_inst.h gets used have proper definitions. But it would be good to add the definition in itself.

Review URL: https://codereview.webrtc.org/1446093003

Cr-Commit-Position: refs/heads/master@{#10653}
2015-11-16 16:07:04 +00:00
3cea256806 Reland "Prevent Opus DTX from generating intermittent noise during silence"
The original CL is reviewed at
https://codereview.webrtc.org/1415173005/

A silly mistake was made at the last patch set, and the CL was reverted. This CL is to fix and reland it.

BUG=

Review URL: https://codereview.webrtc.org/1422213003

Cr-Commit-Position: refs/heads/master@{#10574}
2015-11-10 11:49:32 +00:00
b4a753fdb5 Revert of Prevent Opus DTX from generating intermittent noise during silence (patchset #10 id:250001 of https://codereview.webrtc.org/1415173005/ )
Reason for revert:
Breaks voe_auto_test on all three "large tests bots".
https://build.chromium.org/p/client.webrtc/builders/Win32%20Release%20%5Blarge%20tests%5D/builds/5630/steps/voe_auto_test/logs/stdio
https://build.chromium.org/p/client.webrtc/builders/Mac32%20Release%20%5Blarge%20tests%5D/builds/5599/steps/voe_auto_test/logs/stdio
https://build.chromium.org/p/client.webrtc/builders/Linux64%20Release%20%5Blarge%20tests%5D/builds/5645/steps/voe_auto_test/logs/stdio

Notice these bots are no longer a part of the default trybot set, so they have to be run manually when working with code that affects their tests (they were removed as they queued up all the time in the CQ, and usually don't catch breakages).

Original issue's description:
> Prevent Opus DTX from generating intermittent noise during silence.
>
> Opus may have an internal error that causes this. Here we make a workaround by adding some small disturbance to the input signals to break a long sequence of zeros.
>
> BUG=webrtc:5127
>
> Committed: https://crrev.com/f475add57eada116bc960fe2935876ec8c077977
> Cr-Commit-Position: refs/heads/master@{#10565}

TBR=tina.legrand@webrtc.org,kwiberg@webrtc.org,solenberg@webrtc.org,minyue@webrtc.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:5127

Review URL: https://codereview.webrtc.org/1428613004

Cr-Commit-Position: refs/heads/master@{#10567}
2015-11-09 21:27:11 +00:00
f475add57e Prevent Opus DTX from generating intermittent noise during silence.
Opus may have an internal error that causes this. Here we make a workaround by adding some small disturbance to the input signals to break a long sequence of zeros.

BUG=webrtc:5127

Review URL: https://codereview.webrtc.org/1415173005

Cr-Commit-Position: refs/heads/master@{#10565}
2015-11-09 18:08:20 +00:00
288886b2ec Pass audio to AudioEncoder::Encode() in an ArrayView
Instead of in separate pointer and size arguments.

Review URL: https://codereview.webrtc.org/1418423010

Cr-Commit-Position: refs/heads/master@{#10535}
2015-11-06 09:21:39 +00:00
a41ab9326c Switch usage of _DEBUG macro to NDEBUG.
http://stackoverflow.com/a/29253284/5237416

BUG=None
R=tommi@webrtc.org
NOPRESUBMIT=true

Review URL: https://codereview.webrtc.org/1429513004

Cr-Commit-Position: refs/heads/master@{#10468}
2015-10-30 23:08:54 +00:00
74640895fa audio_coding: rename interface -> include
BUG=webrtc:5095
R=henrik.lundin@webrtc.org
TBR=tommi@webrtc.org

Review URL: https://codereview.webrtc.org/1417173004 .

Cr-Commit-Position: refs/heads/master@{#10444}
2015-10-29 10:31:11 +00:00
98f53510b2 system_wrappers: rename interface -> include
BUG=webrtc:5095
R=tommi@webrtc.org

Review URL: https://codereview.webrtc.org/1413333002 .

Cr-Commit-Position: refs/heads/master@{#10438}
2015-10-28 17:17:50 +00:00
5460f9b81d Workaround for false positive -Wmaybe-uninitialized being triggered on some compilers
Some toolchains (in this case referring to a g++ 4.9, or "arm-linux-
androideabi-g++ (GCC) 4.9 20140827 (prerelease)" according to my
--version, from the Android NDK r10e-rc4 and potentially with custom
patches; others may be affected as well) fail to prove that myVec in
WebRtcIsac_CorrelateInterVec is never used uninitialized. This is likely
due to the compiler thinking the assignment in line 468 might not
happen. Changing the loop condition in line 466 to rowCntr <
SOME_CONSTANT also helps, suggesting that the compiler can't infer that
there are only 2 values interVecDim can have at that point, and neither
of them are 0. Of course, this is not an acceptable fix, as it changes
behaviour.

This seems to be a compiler bug, or at least an issue with its
heuristics. However, we can't really change toolchains at the moment,
and ultimately this change improves support for certain older compilers.

BUG=

Review URL: https://codereview.webrtc.org/1406423004

Cr-Commit-Position: refs/heads/master@{#10337}
2015-10-20 12:45:09 +00:00
bd7de0c6ef Delete full-band mode from the iSAC codec
This mode is no longer used.

BUG=4210

Review URL: https://codereview.webrtc.org/1392173004

Cr-Commit-Position: refs/heads/master@{#10275}
2015-10-14 13:06:00 +00:00
6d92bf59f3 Returning correct duration estimate on Opus DTX packets.
Bug 4985 revealed two flaws
1. Opus duration estimate did not return correct length for DTX packets,

2. NetEq DoCodecInternalCng did not assign enough buffer.

P.S.
Generalizing problem 1, current NetEq decode function checks memory size by calling the duration estimate function. This is not ideal. A better way is to let codec's decode function to receive buffer size and return failure if it is not enough. This can be made in a separate CL.

BUG=webrtc:4985
R=henrik.lundin@webrtc.org

Review URL: https://codereview.webrtc.org/1334303005 .

Cr-Commit-Position: refs/heads/master@{#10031}
2015-09-23 13:20:56 +00:00
8967183bf7 Simple cleanups of AudioDecoder and AudioEncoder classes
* Make sure they're all final and don't allow copying or assignment.

  * Get rid of the single-channel PCM decoder classes.

  * Move some includes from .h to .cc files where possible.

BUG=webrtc:4557

Review URL: https://codereview.webrtc.org/1353803002

Cr-Commit-Position: refs/heads/master@{#10021}
2015-09-22 21:06:34 +00:00
7404368998 Move AudioDecoderIsac* to its own files
Currently, it's sitting in AudioEncoderIsac*'s files, which is less
than obvious. This CL puts the encoder and decoder in separate files
together with the C implementation; CLs are afoot to make it so for
the other built-in codecs as well.

BUG=webrtc:4557
R=henrik.lundin@webrtc.org

Review URL: https://codereview.webrtc.org/1339253003 .

Cr-Commit-Position: refs/heads/master@{#10018}
2015-09-22 17:31:52 +00:00
6faf5bebba Move AudioDecoderPcm* next to AudioEncoderPcm*
All AudioDecoder subclasses have historically lived in NetEq, but they
fit better with the codec they wrap.

BUG=webrtc:4557

Review URL: https://codereview.webrtc.org/1348613003

Cr-Commit-Position: refs/heads/master@{#10015}
2015-09-22 13:16:56 +00:00
2803a40fe3 Fix ChromeOS build (C99 break)
BUG=5016
TBR=henrik.lundin@webrtc.org

Review URL: https://codereview.webrtc.org/1354163002

Cr-Commit-Position: refs/heads/master@{#9992}
2015-09-18 14:50:50 +00:00
ada4c130ab Move AudioDecoderG722 next to AudioEncoderG722
All AudioDecoder subclasses have historically lived in NetEq, but they
fit better with the codec they wrap.

BUG=webrtc:4557

Review URL: https://codereview.webrtc.org/1346993002

Cr-Commit-Position: refs/heads/master@{#9966}
2015-09-17 10:12:38 +00:00
91d6edef35 Add RTC_ prefix to (D)CHECKs and related macros.
We must remove dependency on Chromium, i.e. we can't use Chromium's base/logging.h. That means we need to define these macros in WebRTC also when doing Chromium builds. And this causes redefinition.

Alternative solutions:
* Check if we already have defined e.g. CHECK, and don't define them in that case. This makes us depend on include order in Chromium, which is not acceptable.
* Don't allow using the macros in WebRTC headers. Error prone since if someone adds it there by mistake it may compile fine, but later break if a header in added or order is changed in Chromium. That will be confusing and hard to enforce.
* Ensure that headers that are included by an embedder don't include our macros. This would require some heavy refactoring to be maintainable and enforcable.
* Changes in Chromium for this is obviously not an option.

BUG=chromium:468375
NOTRY=true

Review URL: https://codereview.webrtc.org/1335923002

Cr-Commit-Position: refs/heads/master@{#9964}
2015-09-17 07:24:51 +00:00
c0ac6cad00 Move AudioDecoderPcm16B next to AudioEncoderPcm16B
All AudioDecoder subclasses have historically lived in NetEq, but they
fit better with the codec they wrap.

BUG=webrtc:4557
R=henrik.lundin@webrtc.org

Review URL: https://codereview.webrtc.org/1348113002 .

Cr-Commit-Position: refs/heads/master@{#9963}
2015-09-17 05:47:55 +00:00
fff9f176f5 Move AudioDecoderIlbc next to AudioEncoderIlbc
All AudioDecoder subclasses have historically lived in NetEq, but they
fit better with the codec they wrap.

BUG=webrtc:4557

Review URL: https://codereview.webrtc.org/1348053002

Cr-Commit-Position: refs/heads/master@{#9961}
2015-09-17 04:26:39 +00:00
3c089d751e Add RTC_ prefix to contructormagic macros.
We must remove dependency on Chromium, i.e. we can't use Chromium's base/logging.h. That means we need to define these macros in WebRTC also when doing Chromium builds. And this causes redefinition.

* DISALLOW_ASSIGN -> RTC_DISALLOW_ASSIGN
* DISALLOW_COPY_AND_ASSIGN -> RTC_DISALLOW_COPY_AND_ASSIGN
* DISALLOW_IMPLICIT_CONSTRUCTORS -> RTC_DISALLOW_IMPLICIT_CONSTRUCTORS

Related CL: https://codereview.webrtc.org/1335923002/

BUG=chromium:468375
NOTRY=true

Review URL: https://codereview.webrtc.org/1345433002

Cr-Commit-Position: refs/heads/master@{#9953}
2015-09-16 12:37:52 +00:00
0b05879cd7 Move AudioDecoderOpus next to AudioEncoderOpus
All AudioDecoder subclasses have historically lived in NetEq, but they
fit better with the codec they wrap.

BUG=webrtc:4557
R=henrik.lundin@webrtc.org

Review URL: https://codereview.webrtc.org/1342933005 .

Cr-Commit-Position: refs/heads/master@{#9944}
2015-09-15 15:28:29 +00:00
7bff85c2bc Android: Enable C99 mode instead of C89 (default).
BUG=webrtc:4960
TESTED=Built locally using GYP and GN for Android.
R=andrew@webrtc.org, brettw@chromium.org

Review URL: https://codereview.webrtc.org/1321193003 .

Cr-Commit-Position: refs/heads/master@{#9937}
2015-09-15 06:16:11 +00:00
9b66d3ba60 MockAudioEncoder: Use a dedicated marker method for test expectations
This makes the sequence of expected calls easier to read. Also, we can
save one line and get rid of a gmock warning by expecting the
MockAudioEncoder object to be destroyed at the end of the test instead
of making a final marker call.

Review URL: https://codereview.webrtc.org/1331793003

Cr-Commit-Position: refs/heads/master@{#9916}
2015-09-10 12:09:49 +00:00
942a699f14 AudioEncoderOpusTest.PacketLossRateOptimized: Fix bug and make prettier
Fix bug 4981, which caused the second half (decreasing loss rates) to
not test anything. In the process, the test is changed slightly to
make it less dependent on the exact rounding behavior of doubles (by
not testing exactly at the the points where the effective loss rate
goes through a step---just very very close). A bunch of symbolic
constants are also replaced with easy-to-read literal numbers.

BUG=4981

Review URL: https://codereview.webrtc.org/1316673010

Cr-Commit-Position: refs/heads/master@{#9908}
2015-09-09 13:43:04 +00:00
77d22fa014 Merge two files with AudioEncoderOpus tests
Merge the contents of audio_encoder_mutable_opus_test.cc into
audio_encoder_opus_unittest.cc, since they're now both testing
AudioEncoderOpus.

(While preparing this CL, I noted a bug in the PacketLossRateOptimized
test. This CL leaves that test essentially unchanged; I've posted bug
4981 about the problem.)

Review URL: https://codereview.webrtc.org/1319713004

Cr-Commit-Position: refs/heads/master@{#9906}
2015-09-09 11:38:37 +00:00
c99ebc1490 Remove AudioEncoder methods SetMaxBitrate and SetMaxPayloadSize
And the corresponding ACM methods SetISACMaxRate and
SetISACMaxPayloadSize. They were only used in tests.

Review URL: https://codereview.webrtc.org/1311533010

Cr-Commit-Position: refs/heads/master@{#9903}
2015-09-09 07:54:10 +00:00
3f5f1c2ad3 Change return type of AudioEncoder::SetMaxPlaybackRate to void
There's no point in returning a status code, since the max playback rate
is only a suggestion that the encoder is free to disregard.

Review URL: https://codereview.webrtc.org/1332573003

Cr-Commit-Position: refs/heads/master@{#9900}
2015-09-09 06:15:41 +00:00
e9e7896293 Turn webrtc::Vad into a pure virtual interface
Review URL: https://codereview.webrtc.org/1317243005

Cr-Commit-Position: refs/heads/master@{#9899}
2015-09-09 06:04:57 +00:00
12cfc9b4da Fold AudioEncoderMutable into AudioEncoder
It makes more sense to combine the two interfaces, since there wasn't
a clear line separating them. The result is a combined interface with
just over a dozen methods, half of which need to be implemented by
every subclass, while the other half have sensible (and trivial)
default implementations and are implemented only by the few subclasses
that need non-default behavior.

Review URL: https://codereview.webrtc.org/1322973004

Cr-Commit-Position: refs/heads/master@{#9894}
2015-09-08 12:57:59 +00:00
81db11aa50 copy-red: Fill an rtc::Buffer with bytes the easy way
The easy way also happens to be more efficient if we have to
reallocate, but that's a minor concern here.

Review URL: https://codereview.webrtc.org/1327053002

Cr-Commit-Position: refs/heads/master@{#9876}
2015-09-08 03:14:40 +00:00
b7306ae6fe Revert "Avoiding size_t in MIPS."
This reverts commit 32e2f461b13c530d34f9c434e7e76da6ff3eda83.

BUG=526716
TBR=minyue@webrtc.org

Review URL: https://codereview.webrtc.org/1314873004 .

Cr-Commit-Position: refs/heads/master@{#9824}
2015-08-31 18:44:05 +00:00
32e2f461b1 Avoiding size_t in MIPS.
TBR=pkasting@chromium.org

BUG=526716

Review URL: https://codereview.webrtc.org/1310553008 .

Cr-Commit-Position: refs/heads/master@{#9823}
2015-08-31 15:40:17 +00:00
1380e266ff Convert some more things to size_t.
These changes stem from requests by Andrew on https://codereview.webrtc.org/1228823002/ to eliminate some "return -1"s and change to using asserts plus returning size_ts.  I then also converted the relevant connected bits.

This also cleans up a bunch of style issues, e.g. no spaces around operators.

BUG=chromium:81439
TEST=none
R=andrew@webrtc.org, henrik.lundin@webrtc.org, niklas.enbom@webrtc.org

Review URL: https://codereview.webrtc.org/1305983003 .

Cr-Commit-Position: refs/heads/master@{#9813}
2015-08-29 00:31:15 +00:00
a567bf3292 Rename local variable to avoid shadowing
See comment here: https://codereview.webrtc.org/1208993010/diff/180001/webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t_impl.h#newcode189

TBR=minyue@webrtc.org

Review URL: https://codereview.webrtc.org/1315333003

Cr-Commit-Position: refs/heads/master@{#9800}
2015-08-27 18:17:40 +00:00
4376648df0 AudioDecoder: Replace Init() with Reset()
The Init() method was previously used to initialize and reset
decoders, and returned an error code. The new Reset() method is used
for reset only; the constructor is now responsible for fully
initializing the AudioDecoder.

Reset() doesn't return an error code; it turned out that none of the
functions it ended up calling could actually fail, so this CL removes
their error return codes as well.

R=henrik.lundin@webrtc.org

Review URL: https://codereview.webrtc.org/1319683002 .

Cr-Commit-Position: refs/heads/master@{#9798}
2015-08-27 13:22:21 +00:00
2f20fbec1d Fix MIPS compile.
BUG=chromium:524885
TEST=none
TBR=turaj

Review URL: https://codereview.webrtc.org/1316843003 .

Cr-Commit-Position: refs/heads/master@{#9790}
2015-08-26 21:38:55 +00:00
dce40cf804 Update a ton of audio code to use size_t more correctly and in general reduce
use of int16_t/uint16_t.

This is the upshot of a recommendation by henrik.lundin and kwiberg on an original small change ( https://webrtc-codereview.appspot.com/42569004/#ps1 ) to stop using int16_t just because values could fit in it, and is similar in nature to a previous "mass change to use size_t more" ( https://webrtc-codereview.appspot.com/23129004/ ) which also needed to be split up for review but to land all at once, since, like adding "const", such changes tend to cause a lot of transitive effects.

This was be reviewed and approved in pieces:
https://codereview.webrtc.org/1224093003
https://codereview.webrtc.org/1224123002
https://codereview.webrtc.org/1224163002
https://codereview.webrtc.org/1225133003
https://codereview.webrtc.org/1225173002
https://codereview.webrtc.org/1227163003
https://codereview.webrtc.org/1227203003
https://codereview.webrtc.org/1227213002
https://codereview.webrtc.org/1227893002
https://codereview.webrtc.org/1228793004
https://codereview.webrtc.org/1228803003
https://codereview.webrtc.org/1228823002
https://codereview.webrtc.org/1228823003
https://codereview.webrtc.org/1228843002
https://codereview.webrtc.org/1230693002
https://codereview.webrtc.org/1231713002

The change is being landed as TBR to all the folks who reviewed the above.

BUG=chromium:81439
TEST=none
R=andrew@webrtc.org, pbos@webrtc.org
TBR=aluebs, andrew, asapersson, henrika, hlundin, jan.skoglund, kwiberg, minyue, pbos, pthatcher

Review URL: https://codereview.webrtc.org/1230503003 .

Cr-Commit-Position: refs/heads/master@{#9768}
2015-08-24 21:52:45 +00:00
608c3cfe77 iSAC: Make separate AudioEncoder and AudioDecoder objects
The only shared state is now the bandwidth estimation info.
This reduces the amount and complexity of the locking
substantially.

Review URL: https://codereview.webrtc.org/1208993010

Cr-Commit-Position: refs/heads/master@{#9762}
2015-08-24 09:03:28 +00:00
805d8fb6eb Remove WebRtcIsac_Highpass_float().
This function is unreferenced and not even declared in a header file.

Split from https://codereview.webrtc.org/1228793004/ .

BUG=none
TEST=none

Review URL: https://codereview.webrtc.org/1296513002

Cr-Commit-Position: refs/heads/master@{#9716}
2015-08-14 19:38:09 +00:00
b3cc77f4ba Re-enable WebRtcIsacfix_AllpassFilter2FixDec16Neon
WebRtcIsacfix_AllpassFilter2FixDec16Neon was disabled due to a Clang
bug. The bug is fixed in current Clang version, re-enable it in this patch.

BUG=4567
R=andrew@webrtc.org, kjellander@webrtc.org
TEST=buildbot build

Change-Id: I71e309cec6caf376181cf9c299c9e8967c9a328e

Review URL: https://codereview.webrtc.org/1194773002 .

Patch from Zhongwei Yao <zhongwei.yao@arm.com>.

Cr-Commit-Position: refs/heads/master@{#9645}
2015-07-28 03:18:19 +00:00
b297c5a01f Miscellaneous changes split from https://codereview.webrtc.org/1230503003 .
These are mostly trivial changes and are separated out just to reduce the
diff on that change to the minimum possible.

Note explanatory comments on patch set 1.

BUG=none
TEST=none

Review URL: https://codereview.webrtc.org/1235643003

Cr-Commit-Position: refs/heads/master@{#9617}
2015-07-22 22:17:26 +00:00
3258db26ed Split iSAC encoder/decoder: Test more cases (and make sure they work)
This patch tests separate iSAC encoder and decoder in more cases (32
kHz in addition to 16 kHz, and 30 ms adaptive and 60 ms nonadaptive).

In order to handle 32 kHz adaptive, the decoder needs to be told of
the encoder's sample rate (16 kHz worked already because that's the
default). And since we can't set the encoder's frame size without also
setting its bit rate, we need a way to set the decoder's bit rate as
well.

It turned out to be way too messy to continue verifying that the
bandwidth estimator does something reasonable in all these cases,
because it seems it doesn't. So the GetSetBandwidthInfo is now just
responsible for ensuring that split encoder/decoder behaves the same
as conjoined encoder/decoder; the job of verifying that the bandwidth
estimator does its job properly falls on some other test (that doesn't
exist yet).

Review URL: https://codereview.webrtc.org/1225093005

Cr-Commit-Position: refs/heads/master@{#9583}
2015-07-15 01:54:43 +00:00
2224294c52 iSAC: Functions for importing and exporting bandwidth est. info
They make it possible to send bandwidth estimation info from decoder
to encoder even if they are separate objects (which we want them to be
because multithreading).

R=henrik.lundin@webrtc.org

Review URL: https://codereview.webrtc.org/1208923002.

Cr-Commit-Position: refs/heads/master@{#9535}
2015-07-03 02:04:46 +00:00
f4eca64596 iSAC: Pad with zeros instead of random data, to make testing easier
Using random "garbage" bytes makes testing harder for no good reason.
Any deterministic sequence would do, but we choose all zeros because
it's simple.

Review URL: https://codereview.webrtc.org/1211243014

Cr-Commit-Position: refs/heads/master@{#9532}
2015-07-02 09:10:11 +00:00
c6891248b5 Simplify OWNERS structure in modules/audio_coding
All ownership is now handled by the top-level OWNERS file in
modules/audio_coding.

NOTRY=True

Review URL: https://codereview.webrtc.org/1212133005

Cr-Commit-Position: refs/heads/master@{#9512}
2015-06-29 11:54:50 +00:00
ac4234ccfc Add a [rtc_]build_with_neon variable to unify conditions.
Also consolidate ARM options for gn in an arm_neon_config.

R=jridges@masque.com, kjellander@webrtc.org, zhongwei.yao@chromium.org

Review URL: https://codereview.webrtc.org/1181373004.

Cr-Commit-Position: refs/heads/master@{#9501}
2015-06-25 01:25:59 +00:00
3e89dbf458 Add AudioEncoder::GetTargetBitrate
The GetTargetBitrate implementation will return the
target bitrate of the codec. This may differ from the
desired target bitrate, as set by SetTargetBitrate, depending on implementation.

Tests are updated to exercise the new functionality.

R=kwiberg@webrtc.org

Review URL: https://codereview.webrtc.org/1184313002.

Cr-Commit-Position: refs/heads/master@{#9461}
2015-06-18 12:58:46 +00:00