mad-dev May 2008

mad-dev@lists.mars.org

3 participants
2 discussions

madplayer cross-compile on ARM11 compilation error "impossible constraint in 'asm'"
by Jianfeng Li 21 May '08

21 May '08

Hi, All, I am now trying to cross-compile the madplayer on an arm11 based embedded system. The compiler I am using is from montavista mobilinux 5.0. When I tried to build the madplay, for the file resample.c, I got 2 errors on line 89 and 104. The error information is "impossible constraint in 'asm'. When I tried to build the libmad, I also met the same error. But it seems that during compilation if "FPM-ARM" option is enabled then the error is solved. But here I checked the Makefile, there is no such option of "FPM" as in the Makefile of libmad. So can anybody help to tell me why this error happens, it is due to the compiler's constraint/requirement? How should I try to solve this error? Is "trying to enable the FPM" a good option to try? Many thanks in advance! Regards, Jeffen _________________________________________________________________ Invite your mail contacts to join your friends list with Windows Live Spaces. It's easy! http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx…

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Stream Decode
by Alexey V Paramonov 20 May '08

20 May '08

Hi! I have the following question - is it possible to decode a stream using MAD? For example: I have shoutcast stream and I read it in small portions (say, 40960 bytes), decode it and encode back to mp3 using LAME (chaning bitrate, samplerate, etc...). The problem is that I have to call mad_stream_buffer with each piece of stream data, decode/encode it and then if I listen the resulting mp3 file - I notice "noise" between theese small decoded pieces. Seems like it happen not only with VBR files. Pseudo-code: while ( bytes = read(file_id, buff, SHOUT_BUFFER_LENGTH ) ) { mad_stream_buffer(&stream, buff, bytes ); while(1){ mad_frame_decode(&frame,&stream) .... int ret = lame_encode_buffer( lameGlobalFlags, left, right, nsamples, mp3Buf, mp3Size ); // Play resulting mp3 data } } Is it possible to decode a stream without theese "edge effects" ? May be I should not re-initialize MAD buffer after each read in some way? Please help.

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mad-dev May 2008