I write a stream server according to rfc 2435 using liveMedia library. I created a class inherited from JPEGVideoSource. It works fine with JPEGs with two quantization tables. When I try to stream JPEG with one quantization table, recieved JPEGs are broken. They have a reference to quantization table with Id = 1. I looked to the source code of JPEGVideoRTPSource: line 224 // MARKER_SOF0: *ptr++ = 0xFF; *ptr++ = MARKER_SOF0; *ptr++ = 0x00; *ptr++ = 0x11; // size of chunk *ptr++ = 0x08; // sample precision *ptr++ = (BYTE)(h >> 8); *ptr++ = (BYTE)(h); // number of lines (must be a multiple of 8) *ptr++ = (BYTE)(w >> 8); *ptr++ = (BYTE)(w); // number of columns (must be a multiple of 8) *ptr++ = 0x03; // number of components *ptr++ = 0x01; // id of component *ptr++ = type ? 0x22 : 0x21; // sampling ratio (h,v) *ptr++ = 0x00; // quant table id *ptr++ = 0x02; // id of component *ptr++ = 0x11; // sampling ratio (h,v) *ptr++ = numQtables == 1 ? 0x00 : 0x01; // quant table id *ptr++ = 0x03; // id of component *ptr++ = 0x11; // sampling ratio (h,v) *ptr++ = 0x01; // quant table id
In the last line quant table id is set to one in any case. Is it a bug, or what I do wrong? May be I use to set type to value other than 0 or 1? Thanks. _______________________________________________ live-devel mailing list live-devel@lists.live555.com http://lists.live555.com/mailman/listinfo/live-devel
