similar to: Regarding cross compiling of ogg vordis decoder to arm board

Hi, While following the developer mailing list, I came across "tremor-lowmem" version. I did some search of it in Xiph.org and "tremor" source code but wasn't able to find it. I would like to know if there is any separate thread for the "tremor-lowmem" version as we are working on the fixed point implementation of Vorbis code and we are looking forward for

Hi All, Currently I am investigating how interesting OGG is for me. The most important requirements are: - Decoding on embedded hardware, ARM7 or ARM9. - Mixing multiple audio streams/files on embedded hardware First of all how difficult is it to decode OGG on an ARM7/9 processor? I read that OGG decoding needs floating point support? Secondly I would like to know how many MIPS are needed to

Hi Is there any Altivec optimized libVorbis implementation source code out there ? The only thing I'v found is that message: http://lists.xiph.org/pipermail/vorbis-dev/2003-October/007835.html but the link is dead, so the source code is lost (forever ?). I need to decode from 10 to 30 ogg files on my PS3 on the fly (files are already in memory, so I'm not I/O bound) and do something

Hi all, I'm porting the Tremor code to an ARM platform. Unfortunately, we didn't use the low mem branch code for CPU performance consideration, and now I find the memory use in it is huge for the embedded system. After looking into the code, I found the header parse, especially, the codebook unpack part takes a lot of memory. Tremor decodes the codebooks to a cache to store

Hi, I'm a Pocket PC developer and have created a audio translator application on this platform. I currently make use of an MP3 decoder engine, but due to heavy licensing fees I'm thinking of switching over to a patent free format. Vorbis presents the best approach. I read that tremor decoder has been especially optimized for embedded devices. I'd like to make use of this and

Hi All, I am planning to implement Ogg Vorbis Decoder on a 24 bit DSP. I have following doubts: 1) What is min and max bitrate? 2)What is max Audio Packet size ? 3)What is the max size of setup header? 4)Any idea how to start for making a 24Bit fixed point reference code? Shall I start with floating point or Tremor or Tremor Low Mem Version? 5) What window sizes in Ogg Vorbis are normally

What exactly does it mean when, in the decoder_example.c file, you try to extract the information from the comments and codebook headers and you loose sync? What is actually being check to determine when sync is lost?. I known one part of it is that there is a gaps in the stream. Is the CRC value the determining factor? Please detail! I read a lot of the documents. I still am a little fuzzy.

hi, could someone please apply these to Tremor svn? 0001-update_symbols.patch there are 3 public symbols in the headers, which are missing in the linker script and thus marked as private again. This causes issues for e.g. gstreamer (https://bugzilla.gnome.org/show_bug.cgi?id=616194). 0002-pkgconfig.patch this adds a pkg config file You probably also want to do something like Index:

Hi all, Does anyone have any experience porting libvorbis to platforms with small total memory sizes? Specifically, I'm trying to figure out if it's feasible to run Ogg Vorbis decoding on one of the PlayStation 3's SPU's -- secondary processors with only 256kb of local memory. It looks like out of the box the memory footprint of libvorbis is roughly: ~130k code ~60k static

Hello, I may be stupid, but I cannot find any data on how "expensive" the Vorbis Decoder is. Looking for an embedded solution I am interested in how many "MIPS" you need to decode a MONO audio stream at reasonable quality (44 kHz, approx. 100 kbps?) Can it be done in a microcontroller, or do I need ultra-expensive DSPs to do it? Thanks for hints Jens --- >8 ---- List

I checked out the lowmem-branch of Tremor from CVS but some files like synthesis.c seem to be missing on that branch. What am I doing wrong? Thanks, -Dave --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe'

Hello all Can anyone point me to some form of description for the fields in the following structures : 1/ vorbis_dsp_state 2/ vorbis_block Thank you. regards ~previr _____________________________________________________________ Previr Rangroo STMicroelectronics Associate Systems Lab Engineer Plot No. 2 & 3, Audio Competence Center Sector 16A,

Hello all Can anyone point me to some form of description for the fields in the following structures : 1/ vorbis_dsp_state 2/ vorbis_block Thank you. regards ~previr _____________________________________________________________ Previr Rangroo STMicroelectronics Associate Systems Lab Engineer Plot No. 2 & 3, Audio Competence Center Sector 16A,

As to tremor fixed-point implementation, i got several questions, and hopefully some one can help me out. Thanks a lot! 1. For DSP chips with small and limited memory, how much memory do we really need for saving all codebooks before we start to decode audio packets? Can the bit-rate give us some clues? Is there some simple guidelines for this? 2. For CRC error protection, it seems to me that

Hello, I'm currently evaluating different codecs to create a list of candidates for my current project. My criteria are simple: - What is the expected highest compression ratio where no noticeable degradation occurs yet? I need something like 1/8th compared with wave data. - Is it possible to access the decoded streams for further processing outside of the codec? If yes, can the data be

Can anybody point me at any resources that would explain how to optimize mdct_backward for a cpu with a fused multiply-accumute unit? >From what I understand from responses to my older postings, Tremor's mdct_backward could be rewritten to take advantage of a muladd. My target machine can do either two-wide 32x32 + Accum(64) -> Accum(64) integer muladd or eight-wide 16x16 + Accum(32)

Hi all, What are the steps to get Vorbis running on a TI C6713? I know I should use the floating point code, but am unsure what files I should compile in Code Composer Studio. Specificially, I am using the TMS320C6713 to receive Vorbis through a manufactured UART Daughter Card and output raw audio through its audio jack. Thanks for your help, Matt Hutchinson -- Matt Hutchinson Rice University

Hi guys, I'm writing a sample playback engine using vorbisfile, but I've hit a performance problem - hoping someone here can help! I'm using ov_open_callbacks() to decode memory-based ogg files. It works OK, but when I call ov_open_callbacks() approximately 300k of memory is used (presumably to initialise the decoder). It also takes some time to execute ov_open_callbacks() - the read

Hi, V have used the tool chains arm-elf-gcc-3.2.1.tar.bz2 arm-linux-gcc-3.4.3_1.0.1tar.bz And v r using the - Cirrus-arm-linux-2.0.8-full.tar.bz2(kernel version 2.6) pls help us. V ll be using the "libvorbis-1.2.0.tar.gz" tool chain..... EP9302 Overview The EP9302 is an ARM920T-based system-on-a-chip design with a peripheral set targeted to a variety of applications:

I downloaded C codes from http://www.xiph.org/ for OGG codec development, and I use MS Visual C. Could anyone please give me some clues about what the other C & header files I should include in the project? There should be some many files I need to put them all together for running OGG decoding and have a good study of them. I am trying hard to understand the specification and to re-write