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优化enhanced-rtmp解析性能 (#2717)

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夏楚 2023-07-29 13:24:21 +08:00 committed by GitHub
parent 00b3c5184a
commit bd8ad2eabf
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2 changed files with 52 additions and 21 deletions
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67
src/Rtmp/Rtmp.cpp
View File

@ -257,50 +257,75 @@ void RtmpHandshake::random_generate(char *bytes, int size) {
}
}
#pragma pack(push, 1)
struct RtmpVideoHeaderEnhanced {
#if __BYTE_ORDER == __BIG_ENDIAN
uint8_t enhanced : 1;
uint8_t frame_type : 3;
uint8_t pkt_type : 4;
uint32_t fourcc;
#else
uint8_t pkt_type : 4;
uint8_t frame_type : 3;
uint8_t enhanced : 1;
uint32_t fourcc;
#endif
};
struct RtmpVideoHeaderClassic {
#if __BYTE_ORDER == __BIG_ENDIAN
uint8_t frame_type : 4;
uint8_t codec_id : 4;
uint8_t h264_pkt_type;
#else
uint8_t codec_id : 4;
uint8_t frame_type : 4;
uint8_t h264_pkt_type;
#endif
};
#pragma pack(pop)
CodecId parseVideoRtmpPacket(const uint8_t *data, size_t size, RtmpPacketInfo *info) {
RtmpPacketInfo save;
info = info ? info : &save;
info->codec = CodecInvalid;
CHECK(size > 0);
if (data[0] >> 7) {
RtmpVideoHeaderEnhanced *enhanced_header = (RtmpVideoHeaderEnhanced *)data;
if (enhanced_header->enhanced) {
// IsExHeader == 1
CHECK(size >= 5, "Invalid rtmp buffer size: ", size);
info->is_enhanced = true;
info->video.frame_type = (RtmpFrameType)((data[0] >> 4) & 0x07);
info->video.pkt_type = (RtmpPacketType)(data[0] & 0x0f);
if (memcmp(data + 1, "av01", 4) == 0) {
// AV1
info->codec = CodecAV1;
} else if (memcmp(data + 1, "vp09", 4) == 0) {
// VP9
info->codec = CodecVP9;
} else if (memcmp(data + 1, "hvc1", 4) == 0) {
// HEVC(H265)
info->codec = CodecH265;
} else {
WarnL << "Rtmp video codec not supported: " << std::string((char *)data + 1, 4);
info->video.frame_type = (RtmpFrameType)(enhanced_header->frame_type);
info->video.pkt_type = (RtmpPacketType)(enhanced_header->pkt_type);
switch (ntohl(enhanced_header->fourcc)) {
case fourcc_av1: info->codec = CodecAV1; break;
case fourcc_vp9: info->codec = CodecVP9; break;
case fourcc_hevc: info->codec = CodecH265; break;
default: WarnL << "Rtmp video codec not supported: " << std::string((char *)data + 1, 4);
}
} else {
// IsExHeader == 0
RtmpVideoHeaderClassic *classic_header = (RtmpVideoHeaderClassic *)data;
info->is_enhanced = false;
info->video.frame_type = (RtmpFrameType)(data[0] >> 4);
auto rtmp_codec = (RtmpVideoCodec)(data[0] & 0x0f);
switch (rtmp_codec) {
info->video.frame_type = (RtmpFrameType)(classic_header->frame_type);
switch ((RtmpVideoCodec)(classic_header->codec_id)) {
case RtmpVideoCodec::h264: {
CHECK(size >= 1, "Invalid rtmp buffer size: ", size);
info->codec = CodecH264;
info->video.h264_pkt_type = (RtmpH264PacketType)data[1];
info->video.h264_pkt_type = (RtmpH264PacketType)classic_header->h264_pkt_type;
break;
}
case RtmpVideoCodec::h265: {
CHECK(size >= 1, "Invalid rtmp buffer size: ", size);
info->codec = CodecH265;
info->video.h264_pkt_type = (RtmpH264PacketType)data[1];
info->video.h264_pkt_type = (RtmpH264PacketType)classic_header->h264_pkt_type;
break;
}
default: WarnL << "Rtmp video codec not supported: " << (int)rtmp_codec; break;
default: WarnL << "Rtmp video codec not supported: " << (int)classic_header->codec_id; break;
}
}
return info->codec;

6
src/Rtmp/Rtmp.h
View File

@ -357,6 +357,12 @@ struct RtmpPacketInfo {
};
};
// https://github.com/veovera/enhanced-rtmp
// 增强型rtmp FourCC
static constexpr uint32_t fourcc_vp9 = 'vp09';
static constexpr uint32_t fourcc_av1 = 'av01';
static constexpr uint32_t fourcc_hevc = 'hvc1';
CodecId parseVideoRtmpPacket(const uint8_t *data, size_t size, RtmpPacketInfo *info = nullptr);
}//namespace mediakit