各协议全面支持vp8/vp9/av1编码，ertmp新增支持opus编码 (#4498)

实现功能：
- rtp 增加vp8，vp9和av1编码支持
- 实现MP4录像所需的extra_data接口
- 扩展rtmp增加对opus、vp8、vp9和av1的支持

已知问题：
- 开启enhance rtmp后，ffmpeg暂时不支持播放vp8编码格式，其他格式的支持
- vp9和av1开始播放时容易遇到卡顿情况，过几秒后好了，原因暂时未知

---------

Co-authored-by: xia-chu <771730766@qq.com>

ext-codec/VP8.cpp

@@ -0,0 +1,79 @@
+#include "VP8.h"
+#include "VP8Rtp.h"
+#include "VpxRtmp.h"
+#include "Extension/Factory.h"
+
+using namespace std;
+using namespace toolkit;
+
+namespace mediakit {
+
+bool VP8Track::inputFrame(const Frame::Ptr &frame) {
+    char *dataPtr = frame->data() + frame->prefixSize();
+    if (frame->keyFrame()) {
+        if (frame->size() - frame->prefixSize() < 10)
+            return false;
+        _width = ((dataPtr[7] << 8) + dataPtr[6]) & 0x3FFF;
+        _height = ((dataPtr[9] << 8) + dataPtr[8]) & 0x3FFF;
+        webm_vpx_codec_configuration_record_from_vp8(&_vpx, &_width, &_height, dataPtr, frame->size() - frame->prefixSize());
+        // InfoL << _width << "x" << _height;
+    }
+    return VideoTrackImp::inputFrame(frame);
+}
+
+Buffer::Ptr VP8Track::getExtraData() const {
+    auto ret = BufferRaw::create(8 + _vpx.codec_intialization_data_size);
+    ret->setSize(webm_vpx_codec_configuration_record_save(&_vpx, (uint8_t *)ret->data(), ret->getCapacity()));
+    return ret;
+}
+
+void VP8Track::setExtraData(const uint8_t *data, size_t size) {
+    webm_vpx_codec_configuration_record_load(data, size, &_vpx);
+}
+
+namespace {
+
+CodecId getCodec() {
+    return CodecVP8;
+}
+
+Track::Ptr getTrackByCodecId(int sample_rate, int channels, int sample_bit) {
+    return std::make_shared<VP8Track>();
+}
+
+Track::Ptr getTrackBySdp(const SdpTrack::Ptr &track) {
+    return std::make_shared<VP8Track>();
+}
+
+RtpCodec::Ptr getRtpEncoderByCodecId(uint8_t pt) {
+    return std::make_shared<VP8RtpEncoder>();
+}
+
+RtpCodec::Ptr getRtpDecoderByCodecId() {
+    return std::make_shared<VP8RtpDecoder>();
+}
+
+RtmpCodec::Ptr getRtmpEncoderByTrack(const Track::Ptr &track) {
+    return std::make_shared<VpxRtmpEncoder>(track);
+}
+
+RtmpCodec::Ptr getRtmpDecoderByTrack(const Track::Ptr &track) {
+    return std::make_shared<VpxRtmpDecoder>(track);
+}
+
+Frame::Ptr getFrameFromPtr(const char *data, size_t bytes, uint64_t dts, uint64_t pts) {
+    return std::make_shared<VP8FrameNoCacheAble>((char *)data, bytes, dts, pts, 0);
+}
+
+} // namespace
+
+CodecPlugin vp8_plugin = { getCodec,
+                            getTrackByCodecId,
+                            getTrackBySdp,
+                            getRtpEncoderByCodecId,
+                            getRtpDecoderByCodecId,
+                            getRtmpEncoderByTrack,
+                            getRtmpDecoderByTrack,
+                            getFrameFromPtr };
+
+} // namespace mediakit