mad-dev December 2004

mad-dev@lists.mars.org

4 participants
4 discussions

libmad 0.15.1b assertion failure
by Glenn Maynard 04 Jan '05

04 Jan '05

I accidentally loaded some non-audio data in my application, and I'm getting: a.out: layer3.c:2640: mad_layer_III: Assertion `stream->md_len + md_len - si.main_data_begin <= (511 + 2048 + 8)' failed. I'm using the low-level interface. I can reproduce this with madlld, if I change INPUT_BUFFER_SIZE from 5*8192 to 4*8192 or lower (my own buffer is 16k). The file (edited down as small as I can get it while still triggering this) is at: http://zewt.org/~glenn/testfile There's … [View More]

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how to convert mp3 into wav by mad?
by Wen 30 Dec '04

30 Dec '04

may i get the wave in 1mono 8bit 8000khz? -- With my best regards, Wen

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RE: [mad-dev] how to convert mp3 into wav by mad?
by Nigel Sinfield 30 Dec '04

30 Dec '04

Assuming your MPEG source has a different sample rate, you'll need to resample it after it has been decoded. You can find example code in the resample.c module of madplay. Average each pair of stereo samples to get mono; drop least-significant bits (with rounding maybe) to get to 8 bits. Out of interest, what is your application? I've tried 7-bit mono at 11kHz, and it sounded awful :-) > -----Original Message----- > From: mad-dev-admin(a)lists.mars.org > [mailto:mad-dev-admin@… [View More]

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MAD performance
by Grigory A. 23 Dec '04

23 Dec '04

Hi! I want to a little discuss this topic - MAD performance. 1. The reason is - usage of MAD in embedded systems. In this case memory usage and cpu cycles consumption are become critical issues. Rewriting of 7-8 functions on asm can provide good compromise between software complexity and decoder performance. Yes it makes code platform specific - but I hope it is acceptable way for embedded systems. 2. some current results. Using such way I've ported MAD to 2 dsp platform: TI … [View More]

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mad-dev December 2004