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682 discussions

buffering madlib samples
by Swapnil Wagle 05 Sep '05

05 Sep '05

Hello, I am trying to play the converted PCM samples from Madlib on PalmOS..But the speed at which Madlib decodes the samples is too high.I am not able to buffer all the samples at one time whicih results in buffer overlapping.I wanted to know whether it is possible to make the Madlib libarary wait for a while till all the current samples have been played. Regards, Swapnil

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Quyery regarding using madlib for decoding streaming mp3 chunks
by Swapnil Wagle 02 Sep '05

02 Sep '05

Hello, Thanks to all you people finally half of the job has been done.I have been able to convert the mp3 file into a wave file on PALM device.And the conversion quality is superb. However my main intension for using Madlib is a different one.So I had some doubts regarding whether this can be done or not. I want to use madlib for decoding the mp3 data that comes from the shoutcast servers.So I wanted ot know whether this can be accomplished using madlib. And whether it will be able to decode chunks of data if given in any order? Regards, Swapnil

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Verificattion for reducing the size of rq_table.dat
by Swapnil Wagle 30 Aug '05

30 Aug '05

Hi, For reducing the size of rq_tbale.dat as suggested by you people I have done following changes within the libray.Can you please verify whether this is correct or not. The changed 'III_requantize' is as follows static mad_fixed_t III_requantize(unsigned int value, signed int exp) { mad_fixed_t requantized; signed int frac; struct fixedfloat const *power; frac = exp % 4; /* assumes sign(frac) == sign(exp) */ exp /= 4; value = value / 8; // Dividing the input value by 8 power = &rq_table[value]; power = power * 16; // Multiplying the result after finding the array index by 16 requantized = power->mantissa; exp += power->exponent; if (exp < 0) { if (-exp >= sizeof(mad_fixed_t) * CHAR_BIT) { /* underflow */ requantized = 0; } else { requantized += 1L << (-exp - 1); requantized >>= -exp; } } else { if (exp >= 5) { /* overflow */ # if defined(DEBUG) fprintf(stderr, "requantize overflow (%f * 2^%d)\n", mad_f_todouble(requantized), exp); # endif requantized = MAD_F_MAX; } else requantized <<= exp; } return frac ? mad_f_mul(requantized, root_table[3 + frac]) : requantized; } Reagrds, swapnil

2 2

output WAV file contains woblling sound
by Swapnil Wagle 22 Aug '05

22 Aug '05

Hello there, I have ported Madlib on Palm OS platform.I am using the 'FPM_DEFAULT' setting for using the Madlib library because usng any other setting the Codewarrior compiler gives an error.The program runs fine but the output WAV file which I am writing conatins wobbling sound.The tune for the song is fine but the output wobbles a lot. I wanted to know whethe this is due to the FPM_DEFAULT setting we are using ,if not then what could be the reason for this kind of output. Regards, Swapnil

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Problem while decoding large size files
by Swapnil Wagle 20 Aug '05

20 Aug '05

Hello, Finally I have been able to run the Madlib on Codewarrior with this forrums help.Well there is still two major problem.I am trying to write a WAV file from the source mp3 file. 1.If the size of the source mp3 file becomes greater than 800KB then a crash occurs within the 'II_huffdecode' function.So what could be the problem over here.I have useing the hogh level API function from minimad for cnversion. 2.If the file is small then the decoding takes place but the data within the output file is all corrupt. Will there be a problem where I am witring the data to a WAV file becoz I alway get output samples? Regards, Swapnil

1 0

problem with the 'rq_table.dat' during compilation
by Swapnil Wagle 20 Aug '05

20 Aug '05

Hello, I am trying to compile Madlib for PalmOS.Since Palm OS has the 68K limitation I removed last 20 entires from the rq_table.dat.Will this work w/o these entires,atleast a garbage output. Secondly the program is compiling now bu constantly crashes in the 'III_huffdecode' function.Can someone please help me I dont know whther I am doing the right thing or not. Regards, Swapnil

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Re: Re: [madplay]:audio_win32.c::struct buffer.event_handle: Can not find the time that sets the event object to the signaled state (Rob Leslie)
by cnmmd 20 Aug '05

20 Aug '05

1'st Init() { ... output[i].event_handle = CreateEvent(0, FALSE /* manual reset */, FALSE /* initial state */, 0); ----->the event object initial state is FALSE,--nonsignaled. .. } After this ,the event_handle is nonsignaled state. ~~~~~~~~~~~~ but in function: int wait(struct buffer *buffer) { MMRESULT error; DWORD tick; if (!buffer->playing) return 0; switch (WaitForSingleObject(buffer->event_handle, INFINITE)) { .. } why the event_handle is signaled state? I only find this time to setevent: void CALLBACK callback(HWAVEOUT handle, UINT message, DWORD data, DWORD param1, DWORD param2) { WAVEHDR *header; struct buffer *buffer; switch (message) { case WOM_DONE: header = (WAVEHDR *) param1; buffer = (struct buffer *) header->dwUser; if (SetEvent(buffer->event_handle) == 0) { ... } case WOM_OPEN: case WOM_CLOSE: -----> nothing to do in this. break; } ------------------------------ Message: 2 Date: Fri, 19 Aug 2005 11:39:24 -0700 From: Rob Leslie <rob(a)mars.org> Subject: Re: [mad-dev] [madplay]:audio_win32.c::struct buffer.event_handle: Can not find the time that sets the event object to the signaled state To: mad-dev(a)lists.mars.org Message-ID: <DE968453-D275-4D13-9D99-F285590788C2(a)mars.org> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed On Aug 18, 2005, at 10:26 PM, cnmmd wrote: > why the event_handle is signaled state? > > I only find this time to setevent: > void CALLBACK callback(HWAVEOUT handle, UINT message, DWORD data, > DWORD param1, DWORD param2) > { > WAVEHDR *header; > struct buffer *buffer; > > switch (message) { > case WOM_DONE: > header = (WAVEHDR *) param1; > buffer = (struct buffer *) header->dwUser; > if (SetEvent(buffer->event_handle) == 0) { > > ... > } That's it. This callback routine is passed to waveOutOpen(), which allows it to be called asynchronously after each data block sent via waveOutWrite() has finished playing. -------->yes, This callback routine will to be called after each data block sent via [waveOutWrite()] has finished playing. but after waveOutOpen(),the callback do nothing.the event object is nonsignaled also. -- Rob Leslie rob(a)mars.org End of mad-dev Digest, Vol 3, Issue 5 ************************************* -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

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[madplay]:audio_win32.c::struct buffer.event_handle: Can not find the time that sets the event object to the signaled state
by cnmmd 19 Aug '05

19 Aug '05

1'st Init() { ... output[i].event_handle = CreateEvent(0, FALSE /* manual reset */, FALSE /* initial state */, 0); .. } After this ,the event_handle is nonsignaled state. but in function: int wait(struct buffer *buffer) { MMRESULT error; DWORD tick; if (!buffer->playing) return 0; tick = GetTickCount(); switch (WaitForSingleObject(buffer->event_handle, INFINITE)) { .. } why the event_handle is signaled state? I only find this time to setevent: void CALLBACK callback(HWAVEOUT handle, UINT message, DWORD data, DWORD param1, DWORD param2) { WAVEHDR *header; struct buffer *buffer; switch (message) { case WOM_DONE: header = (WAVEHDR *) param1; buffer = (struct buffer *) header->dwUser; if (SetEvent(buffer->event_handle) == 0) { ... } -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

2 1

Output samples are alway zero
by Swapnil Wagle 16 Aug '05

16 Aug '05

Hi, I am trying to port Madlib on PalmOS using Codewarrior.So far I have been able to compile and run Madlib using CW. The function 'mad_frame_decode' dosnt return any error meaning the data is being decoded properly( isnt it). But after that when the 'mad_synth_frame' is called it doesnt fills the pcm samples.Can I figure out a way using which I can find whether these function are working properly or not.I debugged the 'synth_full' and 'synth_half' function but didnt for ne thing out of it. Regards, Swapnil

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Preprocessor error while compiling Madlib
by Swapnil Wagle 12 Aug '05

12 Aug '05

Hello, I am trying to compile the Madlib library using Codewarriror 9.3 by creating PACE application. But during the compilation process I get errors related to the Macros defined in 'Fixed.h' file. Can anyone please help me out.The error which I am getting is as follows Error : Preprocessor #error directive fixed.h line 450 #error "no FPM selected" I also wanted to know whether this is the proper process of compiling Madlib using Codewarrior's PACE application. Regards, Swapnil

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