mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-15 06:40:43 +01:00
3e98368ec5
This reverts commit 8e8b36a94a.
Reason for revert: The CL has been improved with the following changes,
- Fixed negotiation of send/receive only clients.
- Handles the implicit assumption that any H264 decoder also can
decode H264 constraint baseline.
Original change's description:
> Distinguish between send and receive codecs
>
> Even though send and receive codecs may be the same, they might have
> different support in HW. Distinguish between send and receive codecs
> to be able to keep track of which codecs have HW support.
>
> Bug: chromium:1029737
> Change-Id: Id119560becadfe0aaf861c892a6485f1c2eb378d
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/165763
> Commit-Queue: Johannes Kron <kron@webrtc.org>
> Reviewed-by: Steve Anton <steveanton@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#30284}
Change-Id: I834ed48ee78d04922c73e2836165e476925e1cc5
Bug: chromium:1029737
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/168605
Commit-Queue: Johannes Kron <kron@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Johannes Kron <kron@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30932}
120 lines
3.5 KiB
C++
120 lines
3.5 KiB
C++
/*
|
|
* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*
|
|
*/
|
|
|
|
#include "modules/video_coding/codecs/h264/include/h264.h"
|
|
|
|
#include <memory>
|
|
#include <string>
|
|
|
|
#include "absl/types/optional.h"
|
|
#include "api/video_codecs/sdp_video_format.h"
|
|
#include "media/base/media_constants.h"
|
|
|
|
#if defined(WEBRTC_USE_H264)
|
|
#include "modules/video_coding/codecs/h264/h264_decoder_impl.h"
|
|
#include "modules/video_coding/codecs/h264/h264_encoder_impl.h"
|
|
#endif
|
|
|
|
#include "rtc_base/checks.h"
|
|
#include "rtc_base/logging.h"
|
|
|
|
namespace webrtc {
|
|
|
|
namespace {
|
|
|
|
#if defined(WEBRTC_USE_H264)
|
|
bool g_rtc_use_h264 = true;
|
|
#endif
|
|
|
|
// If H.264 OpenH264/FFmpeg codec is supported.
|
|
bool IsH264CodecSupported() {
|
|
#if defined(WEBRTC_USE_H264)
|
|
return g_rtc_use_h264;
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
} // namespace
|
|
|
|
SdpVideoFormat CreateH264Format(H264::Profile profile,
|
|
H264::Level level,
|
|
const std::string& packetization_mode) {
|
|
const absl::optional<std::string> profile_string =
|
|
H264::ProfileLevelIdToString(H264::ProfileLevelId(profile, level));
|
|
RTC_CHECK(profile_string);
|
|
return SdpVideoFormat(
|
|
cricket::kH264CodecName,
|
|
{{cricket::kH264FmtpProfileLevelId, *profile_string},
|
|
{cricket::kH264FmtpLevelAsymmetryAllowed, "1"},
|
|
{cricket::kH264FmtpPacketizationMode, packetization_mode}});
|
|
}
|
|
|
|
void DisableRtcUseH264() {
|
|
#if defined(WEBRTC_USE_H264)
|
|
g_rtc_use_h264 = false;
|
|
#endif
|
|
}
|
|
|
|
std::vector<SdpVideoFormat> SupportedH264Codecs() {
|
|
if (!IsH264CodecSupported())
|
|
return std::vector<SdpVideoFormat>();
|
|
// We only support encoding Constrained Baseline Profile (CBP), but the
|
|
// decoder supports more profiles. We can list all profiles here that are
|
|
// supported by the decoder and that are also supersets of CBP, i.e. the
|
|
// decoder for that profile is required to be able to decode CBP. This means
|
|
// we can encode and send CBP even though we negotiated a potentially
|
|
// higher profile. See the H264 spec for more information.
|
|
//
|
|
// We support both packetization modes 0 (mandatory) and 1 (optional,
|
|
// preferred).
|
|
return {
|
|
CreateH264Format(H264::kProfileBaseline, H264::kLevel3_1, "1"),
|
|
CreateH264Format(H264::kProfileBaseline, H264::kLevel3_1, "0"),
|
|
CreateH264Format(H264::kProfileConstrainedBaseline, H264::kLevel3_1, "1"),
|
|
CreateH264Format(H264::kProfileConstrainedBaseline, H264::kLevel3_1,
|
|
"0")};
|
|
}
|
|
|
|
std::unique_ptr<H264Encoder> H264Encoder::Create(
|
|
const cricket::VideoCodec& codec) {
|
|
RTC_DCHECK(H264Encoder::IsSupported());
|
|
#if defined(WEBRTC_USE_H264)
|
|
RTC_CHECK(g_rtc_use_h264);
|
|
RTC_LOG(LS_INFO) << "Creating H264EncoderImpl.";
|
|
return std::make_unique<H264EncoderImpl>(codec);
|
|
#else
|
|
RTC_NOTREACHED();
|
|
return nullptr;
|
|
#endif
|
|
}
|
|
|
|
bool H264Encoder::IsSupported() {
|
|
return IsH264CodecSupported();
|
|
}
|
|
|
|
std::unique_ptr<H264Decoder> H264Decoder::Create() {
|
|
RTC_DCHECK(H264Decoder::IsSupported());
|
|
#if defined(WEBRTC_USE_H264)
|
|
RTC_CHECK(g_rtc_use_h264);
|
|
RTC_LOG(LS_INFO) << "Creating H264DecoderImpl.";
|
|
return std::make_unique<H264DecoderImpl>();
|
|
#else
|
|
RTC_NOTREACHED();
|
|
return nullptr;
|
|
#endif
|
|
}
|
|
|
|
bool H264Decoder::IsSupported() {
|
|
return IsH264CodecSupported();
|
|
}
|
|
|
|
} // namespace webrtc
|