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添加rtcp fci相关代码
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xia-chu
parent
a4ba0c2b60
commit
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@ -9,9 +9,137 @@
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*/
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#include "assert.h"
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#include "RtcpFCI.h"
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#define CHECK(exp) Assert_Throw(!(exp), #exp, __FUNCTION__, __FILE__, __LINE__);
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namespace mediakit {
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FCI_SLI::FCI_SLI(uint16_t first, uint16_t number, uint8_t pic_id) {
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//13 bits
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first &= 0x1FFF;
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//13 bits
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number &= 0x1FFF;
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//6 bits
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pic_id &= 0x3F;
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data = (first << 19) | (number << 6) | pic_id;
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data = htonl(data);
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}
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uint16_t FCI_SLI::getFirst() const {
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return data >> 19;
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}
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uint16_t FCI_SLI::getNumber() const {
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return (data >> 6) & 0x1FFF;
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}
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uint8_t FCI_SLI::getPicID() const {
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return data & 0x3F;
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}
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void FCI_SLI::net2Host() {
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data = ntohl(data);
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}
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string FCI_SLI::dumpString() const {
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return StrPrinter << "First:" << getFirst() << ", Number:" << getNumber() << ", PictureID:" << (int)getPicID();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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void FCI_FIR::net2Host() {
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ssrc = ntohl(ssrc);
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reserved = ntohl(reserved) >> 8;
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}
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string FCI_FIR::dumpString() const {
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return StrPrinter << "ssrc:" << ssrc << ", seq_number:" << seq_number << ", reserved:" << reserved;
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}
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FCI_FIR::FCI_FIR(uint32_t ssrc, uint8_t seq_number, uint32_t reserved) {
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this->ssrc = htonl(ssrc);
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this->seq_number = seq_number;
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this->reserved = htonl(reserved) >> 8;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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string FCI_REMB::create(const initializer_list<uint32_t> &ssrcs, uint32_t bitrate) {
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CHECK(ssrcs.size() > 0 && ssrcs.size() <= 0xFF);
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string ret;
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ret.resize(kSize + ssrcs.size() * 4);
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FCI_REMB *thiz = (FCI_REMB *) ret.data();
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memcpy(thiz->magic, "REMB", 4);
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/* bitrate --> BR Exp/BR Mantissa */
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uint8_t b = 0;
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uint8_t exp = 0;
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uint32_t mantissa = 0;
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for (b = 0; b < 32; b++) {
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if (bitrate <= ((uint32_t) 0x3FFFF << b)) {
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exp = b;
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break;
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}
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}
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if (b > 31) {
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b = 31;
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}
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mantissa = bitrate >> b;
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//Num SSRC (8 bits)
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thiz->bitrate[0] = ssrcs.size() & 0xFF;
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//BR Exp (6 bits)/BR Mantissa (18 bits)
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thiz->bitrate[1] = (uint8_t) ((exp << 2) + ((mantissa >> 16) & 0x03));
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//BR Mantissa (18 bits)
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thiz->bitrate[2] = (uint8_t) (mantissa >> 8);
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//BR Mantissa (18 bits)
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thiz->bitrate[3] = (uint8_t) (mantissa);
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//设置ssrc列表
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auto ptr = thiz->ssrc_feedback;
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for (auto &ssrc : ssrcs) {
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*(ptr++) = htonl(ssrc);
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}
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return ret;
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}
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void FCI_REMB::net2Host(size_t total_size) {
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CHECK(total_size >= kSize);
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CHECK(memcmp(magic, "REMB", 4) == 0);
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auto num_ssrc = bitrate[0];
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auto expect_size = kSize + 4 * num_ssrc;
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CHECK(total_size == expect_size);
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auto ptr = ssrc_feedback;
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while (num_ssrc--) {
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*(ptr++) = ntohl(*ptr);
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}
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}
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uint32_t FCI_REMB::getBitRate() const {
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uint8_t exp = (bitrate[1] >> 2) & 0x3F;
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uint32_t mantissa = (bitrate[1] & 0x03) << 16;
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mantissa += (bitrate[2] << 8);
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mantissa += (bitrate[3]);
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return mantissa << exp;
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}
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vector<uint32_t *> FCI_REMB::getSSRC() {
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vector<uint32_t *> ret;
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auto num_ssrc = bitrate[0];
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auto ptr = ssrc_feedback;
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while (num_ssrc--) {
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ret.emplace_back(ptr++);
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}
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return ret;
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}
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string FCI_REMB::dumpString() const {
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_StrPrinter printer;
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printer << "bitrate:" << getBitRate() << ", ssrc:";
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for (auto &ssrc : ((FCI_REMB *) this)->getSSRC()) {
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printer << *ssrc << " ";
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}
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return printer;
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}
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}//namespace mediakit
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@ -24,11 +24,36 @@ namespace mediakit {
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | First | Number | PictureID |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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//First: 13 bits
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// The macroblock (MB) address of the first lost macroblock. The MB
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// numbering is done such that the macroblock in the upper left
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// corner of the picture is considered macroblock number 1 and the
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// number for each macroblock increases from left to right and then
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// from top to bottom in raster-scan order (such that if there is a
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// total of N macroblocks in a picture, the bottom right macroblock
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// is considered macroblock number N).
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//
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// Number: 13 bits
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// The number of lost macroblocks, in scan order as discussed above.
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//
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// PictureID: 6 bits
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// The six least significant bits of the codec-specific identifier
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// that is used to reference the picture in which the loss of the
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// macroblock(s) has occurred. For many video codecs, the PictureID
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// is identical to the Temporal Reference.
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class FCI_SLI {
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public:
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uint32_t first : 13;
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uint32_t number : 13;
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uint32_t pic_id : 6;
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static size_t constexpr kSize = 4;
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FCI_SLI(uint16_t first, uint16_t number, uint8_t pic_id);
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uint16_t getFirst() const;
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uint16_t getNumber() const;
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uint8_t getPicID() const;
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void net2Host();
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string dumpString() const;
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private:
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uint32_t data;
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} PACKED;
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//PSFB fmt = 3
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@ -61,12 +86,15 @@ public:
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// Native RPSI bit string: variable length
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// The RPSI information as natively defined by the video codec.
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char str[1];
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char bit_string[5];
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//Padding: #PB bits
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// A number of bits set to zero to fill up the contents of the RPSI
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// message to the next 32-bit boundary. The number of padding bits
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// MUST be indicated by the PB field.
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uint8_t padding;
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static size_t constexpr kSize = 8;
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} PACKED;
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//PSFB fmt = 4
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@ -79,6 +107,15 @@ public:
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// | Seq nr. | Reserved |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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class FCI_FIR {
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public:
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uint32_t ssrc;
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uint32_t seq_number: 8;
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uint32_t reserved: 24;
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static size_t constexpr kSize = 8;
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FCI_FIR(uint32_t ssrc, uint8_t seq_number, uint32_t reserved = 0);
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void net2Host();
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string dumpString() const;
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} PACKED;
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@ -92,7 +129,8 @@ class FCI_FIR {
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// | Seq nr. | Reserved | Index |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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class FCI_TSTR {
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public:
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static size_t constexpr kSize = 8;
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} PACKED;
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//PSFB fmt = 6
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@ -104,7 +142,7 @@ class FCI_TSTR {
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | Seq nr. | Reserved | Index |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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class FCI_TSTN {
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class FCI_TSTN : public FCI_TSTR{
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} PACKED;
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@ -120,7 +158,8 @@ class FCI_TSTN {
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// | VBCM Octet String.... | Padding |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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class FCI_VBCM {
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public:
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static size_t constexpr kSize = 12;
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} PACKED;
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//PSFB fmt = 15
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@ -128,12 +167,6 @@ class FCI_VBCM {
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// 0 1 2 3
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// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |V=2|P| FMT=15 | PT=206 | length |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | SSRC of packet sender |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | SSRC of media source |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | Unique identifier 'R' 'E' 'M' 'B' |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | Num SSRC | BR Exp | BR Mantissa |
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@ -141,31 +174,39 @@ class FCI_VBCM {
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// | SSRC feedback |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | ... |
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// Num SSRC (8 bits): Number of SSRCs in this message.
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//
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// BR Exp (6 bits): The exponential scaling of the mantissa for the
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// maximum total media bit rate value, ignoring all packet
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// overhead. The value is an unsigned integer [0..63], as
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// in RFC 5104 section 4.2.2.1.
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//
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// BR Mantissa (18 bits): The mantissa of the maximum total media bit
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// rate (ignoring all packet overhead) that the sender of
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// the REMB estimates. The BR is the estimate of the
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// traveled path for the SSRCs reported in this message.
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// The value is an unsigned integer in number of bits per
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// second.
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//
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// SSRC feedback (32 bits) Consists of one or more SSRC entries which
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// this feedback message applies to.
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class FCI_REMB {
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public:
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static size_t constexpr kSize = 8;
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static string create(const std::initializer_list<uint32_t> &ssrcs, uint32_t bitrate);
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void net2Host(size_t total_size);
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string dumpString() const;
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uint32_t getBitRate() const;
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vector<uint32_t *> getSSRC();
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//Unique identifier 'R' 'E' 'M' 'B'
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char magic[4];
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//Number of SSRCs in this message.
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uint32_t num_ssrc : 8;
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// BR Exp (6 bits): The exponential scaling of the mantissa for the
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// maximum total media bit rate value, ignoring all packet
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// overhead. The value is an unsigned integer [0..63], as
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// in RFC 5104 section 4.2.2.1.
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uint32_t br_exp : 6;
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//BR Mantissa (18 bits): The mantissa of the maximum total media bit
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// rate (ignoring all packet overhead) that the sender of
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// the REMB estimates. The BR is the estimate of the
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// traveled path for the SSRCs reported in this message.
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// The value is an unsigned integer in number of bits per
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// second.
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uint32_t br_mantissa : 18;
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//Num SSRC (8 bits)/BR Exp (6 bits)/ BR Mantissa (18 bits)
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uint8_t bitrate[4];
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// SSRC feedback (32 bits) Consists of one or more SSRC entries which
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// this feedback message applies to.
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uint32_t ssrc_feedback;
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uint32_t ssrc_feedback[1];
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} PACKED;
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@ -254,7 +295,7 @@ public:
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | recv delta | recv delta | zero padding |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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class FCI_TWCC : public FCI_TMMBR{
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class FCI_TWCC{
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public:
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} PACKED;
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41
tests/test_rtcp_fci.cpp
Normal file
41
tests/test_rtcp_fci.cpp
Normal file
@ -0,0 +1,41 @@
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/*
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* Copyright (c) 2016 The ZLToolKit project authors. All Rights Reserved.
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*
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* This file is part of ZLToolKit(https://github.com/xia-chu/ZLToolKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#include <iostream>
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#include "Util/logger.h"
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#include "Rtcp/RtcpFCI.h"
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using namespace std;
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using namespace toolkit;
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using namespace mediakit;
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int main() {
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//初始化日志系统
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Logger::Instance().add(std::make_shared<ConsoleChannel> ());
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{
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FCI_SLI fci(0xFFFF, 0, 0xFF);
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InfoL << 0b10101010101 << " " << 0b01010101010 << " " << (int) 0b101010 << " " << hexdump(&fci, FCI_SLI::kSize);
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fci.net2Host();
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InfoL << fci.dumpString();
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}
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{
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FCI_FIR fci(123456, 139, 456789);
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InfoL << hexdump(&fci, FCI_FIR::kSize);
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fci.net2Host();
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InfoL << fci.dumpString();
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}
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{
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auto str = FCI_REMB::create({1234,2345,5678}, 4 * 1024 * 1024);
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FCI_REMB *ptr = (FCI_REMB *)str.data();
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ptr->net2Host(str.size());
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InfoL << ptr->dumpString();
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}
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return 0;
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}
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