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Refine code to allow search for conflicts.

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winlin 2022-12-25 16:26:15 +08:00
parent ead49e747b
commit 5d48c9ce1b
6 changed files with 27 additions and 27 deletions
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6
trunk/src/kernel/srs_kernel_rtc_rtp.hpp
View file

@ -50,9 +50,9 @@ uint8_t srs_rtp_fast_parse_pt(char* buf, int size);
srs_error_t srs_rtp_fast_parse_twcc(char* buf, int size, uint8_t twcc_id, uint16_t& twcc_sn);
// The "distance" between two uint16 number, for example:
// distance(prev_value=3, value=5) === (int16_t)(uint16_t)((uint16_t)3-(uint16_t)5) === -2
// distance(prev_value=3, value=65534) === (int16_t)(uint16_t)((uint16_t)3-(uint16_t)65534) === 5
// distance(prev_value=65532, value=65534) === (int16_t)(uint16_t)((uint16_t)65532-(uint16_t)65534) === -2
// distance(prev_value=3, value=5) is (int16_t)(uint16_t)((uint16_t)3-(uint16_t)5) is -2
// distance(prev_value=3, value=65534) is (int16_t)(uint16_t)((uint16_t)3-(uint16_t)65534) is 5
// distance(prev_value=65532, value=65534) is (int16_t)(uint16_t)((uint16_t)65532-(uint16_t)65534) is -2
// For RTP sequence, it's only uint16 and may flip back, so 3 maybe 3+0xffff.
// @remark Note that srs_rtp_seq_distance(0, 32768)>0 is TRUE by https://mp.weixin.qq.com/s/JZTInmlB9FUWXBQw_7NYqg
// but for WebRTC jitter buffer it's FALSE and we follow it.

6
trunk/src/kernel/srs_kernel_ts.cpp
View file

@ -1849,7 +1849,7 @@ srs_error_t SrsMpegPES::decode_33bits_dts_pts(SrsBuffer* stream, int64_t* pv)
}
// decode the 33bits schema.
// ===========1B
// --------------1B
// 4bits const maybe '0001', '0010' or '0011'.
// 3bits DTS/PTS [32..30]
// 1bit const '1'
@ -1864,7 +1864,7 @@ srs_error_t SrsMpegPES::decode_33bits_dts_pts(SrsBuffer* stream, int64_t* pv)
}
dts_pts_30_32 = (dts_pts_30_32 >> 1) & 0x07;
// ===========2B
// --------------2B
// 15bits DTS/PTS [29..15]
// 1bit const '1'
int64_t dts_pts_15_29 = stream->read_2bytes();
@ -1873,7 +1873,7 @@ srs_error_t SrsMpegPES::decode_33bits_dts_pts(SrsBuffer* stream, int64_t* pv)
}
dts_pts_15_29 = (dts_pts_15_29 >> 1) & 0x7fff;
// ===========2B
// --------------2B
// 15bits DTS/PTS [14..0]
// 1bit const '1'
int64_t dts_pts_0_14 = stream->read_2bytes();

12
trunk/src/kernel/srs_kernel_ts.hpp
View file

@ -825,14 +825,14 @@ public:
// presentation unit k of elementary stream n. The value of PTS is specified in units of the period of the system clock
// frequency divided by 300 (yielding 90 kHz). The presentation time is derived from the PTS according to equation 2-11
// below. Refer to 2.7.4 for constraints on the frequency of coding presentation timestamps.
// ===========1B
// --------------1B
// 4bits const
// 3bits PTS [32..30]
// 1bit const '1'
// ===========2B
// --------------2B
// 15bits PTS [29..15]
// 1bit const '1'
// ===========2B
// --------------2B
// 15bits PTS [14..0]
// 1bit const '1'
int64_t pts; // 33bits
@ -841,14 +841,14 @@ public:
// The DTS is a 33-bit number coded in three separate fields. It indicates the decoding time,
// td n (j), in the system target decoder of an access unit j of elementary stream n. The value of DTS is specified in units of
// the period of the system clock frequency divided by 300 (yielding 90 kHz).
// ===========1B
// --------------1B
// 4bits const
// 3bits DTS [32..30]
// 1bit const '1'
// ===========2B
// --------------2B
// 15bits DTS [29..15]
// 1bit const '1'
// ===========2B
// --------------2B
// 15bits DTS [14..0]
// 1bit const '1'
int64_t dts; // 33bits