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@ -15,8 +15,9 @@
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#define HEADER_SIZE 12
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#define SC_PACKET_FLAG_CONFIG (UINT64_C(1) << 63)
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#define SC_PACKET_FLAG_KEY_FRAME (UINT64_C(1) << 62)
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#define SC_PACKET_PTS_MASK (SC_PACKET_FLAG_CONFIG - 1)
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#define SC_PACKET_PTS_MASK (SC_PACKET_FLAG_KEY_FRAME - 1)
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static bool
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sc_demuxer_recv_packet(struct sc_demuxer *demuxer, AVPacket *packet) {
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@ -35,10 +36,11 @@ sc_demuxer_recv_packet(struct sc_demuxer *demuxer, AVPacket *packet) {
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// The most significant bits of the PTS are used for packet flags:
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//
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// byte 7 byte 6 byte 5 byte 4 byte 3 byte 2 byte 1 byte 0
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// C....... ........ ........ ........ ........ ........ ........ ........
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// ^<-------------------------------------------------------------------->
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// | PTS
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// `- config packet
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// CK...... ........ ........ ........ ........ ........ ........ ........
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// ^^<------------------------------------------------------------------->
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// || PTS
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// | `- config packet
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// `-- key frame
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uint8_t header[HEADER_SIZE];
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ssize_t r = net_recv_all(demuxer->socket, header, HEADER_SIZE);
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@ -67,6 +69,10 @@ sc_demuxer_recv_packet(struct sc_demuxer *demuxer, AVPacket *packet) {
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packet->pts = pts_flags & SC_PACKET_PTS_MASK;
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}
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if (pts_flags & SC_PACKET_FLAG_KEY_FRAME) {
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packet->flags |= AV_PKT_FLAG_KEY;
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}
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return true;
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}
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