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Andrew Lentvorski

2015-Jul-19 10:37 UTC

[opus] Bug in ARM fixed-point ASM?

Hi, folks,

I've been hunting down some strange bugs in audio I've been doing. 
While hunting my bugs down, I tripped across what appears to be an Opus bug, but
it's not clear where it's coming from.

Note that the optimization choices differ between the two in the config.log
below.  How can I force them to be the same?  Presumably I need to force the
android version toward the Raspberry Pi 2 choices since the processor in the
RPi2 is *way* less powerful.

Thanks,
-a
    
    
Which (if any) of these encodes is correct?
    
Raspberry Pi 2 Result:
Packet size: 0x29
d0 7f 29 1a fa 2b 33 81
70 22 58 6a 3b 0f 3f b5
66 ff ce da 93 9b c2 e9
f1 7a d0 61 fc 0e a6 75
9c 2b 8e 14 92 d6 20 09  << That 20 is different
c6 00 00 00 00 00 00 00


Android result:
Packet size: 0x29
d0 7f 29 1a fa 2b 33 81
70 22 58 6a 3b 0f 3f b5
66 ff ce da 93 9b c2 e9
f1 7a d0 61 fc 0e a6 75
9c 2b 8e 14 92 d6 60 09  << That 60 is different
c6 00 00 00 00 00 00 00


    
Latest Opus from the repository.
commit fc0276fad4ca6aa4b83230329f9fe5ad8b60a621
Author: Timothy B. Terriberry <tterribe at xiph.org>
Date:   Tue Jul 7 11:25:42 2015 -0700
    


Configure for Raspberry Pi 2 (compiled on the Pi itself):
./configure --host=arm-linux-androideabi --enable-fixed-point
--enable-custom-modes --enable-assertions --enable-fixed-point-debug
    
Configure for Android (cross-compiled on OS X):
./configure --host=arm-linux-androideabi --enable-fixed-point
--enable-custom-modes --enable-assertions --enable-fixed-point-debug



config.log results for Raspberry Pi 2:
------------------------------------------------------------------------
  opus 1.1.1-beta-38-gfc0276f:  Automatic configuration OK.

    Compiler support:

      C99 var arrays: ................ yes
      C99 lrintf: .................... yes
      Use alloca: .................... no (using var arrays)

    General configuration:

      Floating point support: ........ no
      Fast float approximations: ..... no
      Fixed point debugging: ......... yes
      Inline Assembly Optimizations: . ARM (EDSP) (Media)
      External Assembly Optimizations: ARM (EDSP) (Media)
      Intrinsics Optimizations.......: no
      Run-time CPU detection: ........ ARM (NEON)
      Custom modes: .................. yes
      Assertion checking: ............ yes
      Fuzzing: ....................... no

      API documentation: ............. yes
      Extra programs: ................ yes
------------------------------------------------------------------------
    

config.log results for Android:
    ------------------------------------------------------------------------
  opus 1.1.1-beta-38-gfc0276f:  Automatic configuration OK.

    Compiler support:

      C99 var arrays: ................ yes
      C99 lrintf: .................... yes
      Use alloca: .................... no (using var arrays)

    General configuration:

      Floating point support: ........ no
      Fast float approximations: ..... no
      Fixed point debugging: ......... yes
      Inline Assembly Optimizations: . ARM (EDSP)
      External Assembly Optimizations: ARM (EDSP)
      Intrinsics Optimizations.......: no
      Run-time CPU detection: ........ ARM (Media) (NEON)
      Custom modes: .................. yes
      Assertion checking: ............ yes
      Fuzzing: ....................... no

      API documentation: ............. yes
      Extra programs: ................ yes
------------------------------------------------------------------------



Test Program:



#include <stdint.h>
#include <string.h>

#include <opus.h>

#include <stdio.h>
#include <assert.h>

uint8_t bbKnownBuffer[1920] __attribute__((aligned (8))) = {
        0x85, 0x00, 0x92, 0x00, 0xa0, 0x00, 0xab, 0x00, 0x7e, 0x00, 0x88, 0x00,
0x3c, 0x00, 0x4e, 0x00,
        0xf5, 0xff, 0x00, 0x00, 0xdb, 0xff, 0xe0, 0xff, 0xc8, 0xff, 0xd2, 0xff,
0xae, 0xff, 0xba, 0xff,
        0x89, 0xff, 0x90, 0xff, 0x66, 0xff, 0x81, 0xff, 0x6e, 0xff, 0x7f, 0xff,
0x64, 0xff, 0x87, 0xff,
        0x5b, 0xff, 0x71, 0xff, 0x4c, 0xff, 0x76, 0xff, 0x58, 0xff, 0x90, 0xff,
0x7a, 0xff, 0xa2, 0xff,
        0xa7, 0xff, 0xd3, 0xff, 0xe3, 0xff, 0xf7, 0xff, 0xfb, 0xff, 0x04, 0x00,
0xe2, 0xff, 0xef, 0xff,
        0xc2, 0xff, 0xbc, 0xff, 0xcd, 0xff, 0xc9, 0xff, 0xc8, 0xff, 0xbc, 0xff,
0x8f, 0xff, 0x7d, 0xff,
        0x51, 0xff, 0x42, 0xff, 0x72, 0xff, 0x5a, 0xff, 0xb9, 0xff, 0x9f, 0xff,
0xea, 0xff, 0xc3, 0xff,
        0xea, 0xff, 0xca, 0xff, 0xf9, 0xff, 0xc8, 0xff, 0x20, 0x00, 0xf3, 0xff,
0x26, 0x00, 0xf7, 0xff,
        0xd6, 0xff, 0xa2, 0xff, 0xa3, 0xff, 0x74, 0xff, 0x74, 0xff, 0x4f, 0xff,
0x5a, 0xff, 0x2e, 0xff,
        0x3c, 0xff, 0x14, 0xff, 0x25, 0xff, 0x05, 0xff, 0x2a, 0xff, 0x15, 0xff,
0x4c, 0xff, 0x40, 0xff,
        0x97, 0xff, 0x96, 0xff, 0xda, 0xff, 0xd0, 0xff, 0x17, 0x00, 0x20, 0x00,
0x5a, 0x00, 0x54, 0x00,
        0x55, 0x00, 0x58, 0x00, 0x5f, 0x00, 0x58, 0x00, 0x5d, 0x00, 0x52, 0x00,
0x5f, 0x00, 0x44, 0x00,
        0x2c, 0x00, 0x1c, 0x00, 0xe6, 0xff, 0xe2, 0xff, 0xef, 0xff, 0xe9, 0xff,
0xed, 0xff, 0xf8, 0xff,
        0xda, 0xff, 0xe5, 0xff, 0xb4, 0xff, 0xd4, 0xff, 0xa3, 0xff, 0xca, 0xff,
0xb6, 0xff, 0xde, 0xff,
        0xc9, 0xff, 0xf3, 0xff, 0xc0, 0xff, 0xeb, 0xff, 0xc7, 0xff, 0xec, 0xff,
0xc9, 0xff, 0xe2, 0xff,
        0xa6, 0xff, 0xb4, 0xff, 0x79, 0xff, 0x82, 0xff, 0x37, 0xff, 0x42, 0xff,
0x24, 0xff, 0x2d, 0xff,
        0x13, 0xff, 0x14, 0xff, 0xc3, 0xfe, 0xd5, 0xfe, 0xb9, 0xfe, 0xcf, 0xfe,
0xd4, 0xfe, 0xe9, 0xfe,
        0xfc, 0xfe, 0x2d, 0xff, 0x4c, 0xff, 0x75, 0xff, 0x70, 0xff, 0xab, 0xff,
0xb2, 0xff, 0xe5, 0xff,
        0xfa, 0xff, 0x29, 0x00, 0x25, 0x00, 0x5d, 0x00, 0x53, 0x00, 0x7c, 0x00,
0x5b, 0x00, 0xa0, 0x00,
        0x6c, 0x00, 0xa3, 0x00, 0x65, 0x00, 0xa3, 0x00, 0x68, 0x00, 0xac, 0x00,
0x95, 0x00, 0xd1, 0x00,
        0xa4, 0x00, 0xea, 0x00, 0xa8, 0x00, 0xe5, 0x00, 0x6d, 0x00, 0xbe, 0x00,
0x57, 0x00, 0xad, 0x00,
        0x5e, 0x00, 0xc0, 0x00, 0x62, 0x00, 0xb7, 0x00, 0x44, 0x00, 0xa5, 0x00,
0x04, 0x00, 0x59, 0x00,
        0xcb, 0xff, 0x24, 0x00, 0xe2, 0xff, 0x37, 0x00, 0xff, 0xff, 0x4b, 0x00,
0x2e, 0x00, 0x72, 0x00,
        0x62, 0x00, 0xa6, 0x00, 0x85, 0x00, 0xc4, 0x00, 0x8e, 0x00, 0xcb, 0x00,
0x74, 0x00, 0xbf, 0x00,
        0x75, 0x00, 0xaf, 0x00, 0x5b, 0x00, 0x9b, 0x00, 0x43, 0x00, 0x90, 0x00,
0x09, 0x00, 0x4c, 0x00,
        0xcc, 0xff, 0x1e, 0x00, 0xd3, 0xff, 0x1a, 0x00, 0xc4, 0xff, 0x06, 0x00,
0x9e, 0xff, 0xe6, 0xff,
        0x8d, 0xff, 0xd6, 0xff, 0x82, 0xff, 0xd4, 0xff, 0x6f, 0xff, 0xb9, 0xff,
0x38, 0xff, 0x8f, 0xff,
        0x1f, 0xff, 0x77, 0xff, 0xec, 0xfe, 0x44, 0xff, 0xc7, 0xfe, 0x1d, 0xff,
0xb6, 0xfe, 0x05, 0xff,
        0x80, 0xfe, 0xd0, 0xfe, 0x94, 0xfe, 0xd1, 0xfe, 0xd9, 0xfe, 0x0c, 0xff,
0xf7, 0xfe, 0x23, 0xff,
        0x1f, 0xff, 0x2a, 0xff, 0x46, 0xff, 0x4d, 0xff, 0x67, 0xff, 0x52, 0xff,
0xa2, 0xff, 0x79, 0xff,
        0xc7, 0xff, 0x9a, 0xff, 0xe8, 0xff, 0xb0, 0xff, 0xe5, 0xff, 0xad, 0xff,
0xc4, 0xff, 0x8d, 0xff,
        0xc4, 0xff, 0x93, 0xff, 0xe7, 0xff, 0xb1, 0xff, 0x09, 0x00, 0xd5, 0xff,
0x0d, 0x00, 0xd9, 0xff,
        0x15, 0x00, 0xdc, 0xff, 0x55, 0x00, 0x1a, 0x00, 0x89, 0x00, 0x48, 0x00,
0x9a, 0x00, 0x66, 0x00,
        0x99, 0x00, 0x72, 0x00, 0xb1, 0x00, 0x81, 0x00, 0xb5, 0x00, 0x97, 0x00,
0x76, 0x00, 0x67, 0x00,
        0x3a, 0x00, 0x31, 0x00, 0xf8, 0xff, 0xf2, 0xff, 0xe2, 0xff, 0xeb, 0xff,
0xf5, 0xff, 0x01, 0x00,
        0xe4, 0xff, 0xff, 0xff, 0xe0, 0xff, 0x02, 0x00, 0x11, 0x00, 0x2f, 0x00,
0x5e, 0x00, 0x83, 0x00,
        0x8d, 0x00, 0xa9, 0x00, 0xa3, 0x00, 0xcd, 0x00, 0xbb, 0x00, 0xe7, 0x00,
0x9a, 0x00, 0xd0, 0x00,
        0x66, 0x00, 0xa8, 0x00, 0x44, 0x00, 0x86, 0x00, 0xfe, 0xff, 0x5a, 0x00,
0xca, 0xff, 0x38, 0x00,
        0x9e, 0xff, 0x0c, 0x00, 0x71, 0xff, 0xf7, 0xff, 0x58, 0xff, 0xe3, 0xff,
0x2a, 0xff, 0xc5, 0xff,
        0x50, 0xff, 0x01, 0x00, 0x7c, 0xff, 0x2d, 0x00, 0x39, 0xff, 0xfe, 0xff,
0x15, 0xff, 0xd8, 0xff,
        0x01, 0xff, 0xc9, 0xff, 0xe5, 0xfe, 0xb1, 0xff, 0xc7, 0xfe, 0x82, 0xff,
0x85, 0xfe, 0x52, 0xff,
        0x7a, 0xfe, 0x34, 0xff, 0x69, 0xfe, 0x25, 0xff, 0x66, 0xfe, 0x1d, 0xff,
0x93, 0xfe, 0x3e, 0xff,
        0xd0, 0xfe, 0x7a, 0xff, 0xef, 0xfe, 0x95, 0xff, 0x34, 0xff, 0xd2, 0xff,
0x88, 0xff, 0x19, 0x00,
        0xc0, 0xff, 0x61, 0x00, 0x1e, 0x00, 0xae, 0x00, 0x28, 0x00, 0xca, 0x00,
0x2f, 0x00, 0xcd, 0x00,
        0x3b, 0x00, 0xcf, 0x00, 0x3f, 0x00, 0xc4, 0x00, 0x5a, 0x00, 0xe1, 0x00,
0x39, 0x00, 0xa5, 0x00,
        0xe9, 0xff, 0x49, 0x00, 0xef, 0xff, 0x36, 0x00, 0xf8, 0xff, 0x2d, 0x00,
0xe1, 0xff, 0xff, 0xff,
        0xe5, 0xff, 0xe8, 0xff, 0xd5, 0xff, 0xbf, 0xff, 0xbd, 0xff, 0x99, 0xff,
0xd4, 0xff, 0x8b, 0xff,
        0xdb, 0xff, 0x8d, 0xff, 0xea, 0xff, 0x7b, 0xff, 0xf5, 0xff, 0x75, 0xff,
0x15, 0x00, 0x85, 0xff,
        0x13, 0x00, 0x6c, 0xff, 0xfe, 0xff, 0x50, 0xff, 0x13, 0x00, 0x5e, 0xff,
0x42, 0x00, 0x85, 0xff,
        0x9a, 0x00, 0xbe, 0xff, 0x9d, 0x00, 0xbe, 0xff, 0x65, 0x00, 0x8b, 0xff,
0x6f, 0x00, 0x88, 0xff,
        0x9a, 0x00, 0xb6, 0xff, 0xa5, 0x00, 0xca, 0xff, 0x7c, 0x00, 0xa3, 0xff,
0x31, 0x00, 0x55, 0xff,
        0x1b, 0x00, 0x4a, 0xff, 0x2d, 0x00, 0x61, 0xff, 0x11, 0x00, 0x47, 0xff,
0xea, 0xff, 0x30, 0xff,
        0xf9, 0xff, 0x35, 0xff, 0xf1, 0xff, 0x3c, 0xff, 0xd4, 0xff, 0x24, 0xff,
0xbb, 0xff, 0x1c, 0xff,
        0xbd, 0xff, 0x2f, 0xff, 0xd2, 0xff, 0x53, 0xff, 0xdb, 0xff, 0x5e, 0xff,
0xb2, 0xff, 0x43, 0xff,
        0xb8, 0xff, 0x4a, 0xff, 0xfd, 0xff, 0x8c, 0xff, 0x56, 0x00, 0xe6, 0xff,
0x8d, 0x00, 0x20, 0x00,
        0x9c, 0x00, 0x3c, 0x00, 0xd9, 0x00, 0x79, 0x00, 0x06, 0x01, 0xaf, 0x00,
0x1e, 0x01, 0xd2, 0x00,
        0x1c, 0x01, 0xdc, 0x00, 0xef, 0x00, 0xc6, 0x00, 0xca, 0x00, 0xb1, 0x00,
0xc3, 0x00, 0xaf, 0x00,
        0xb8, 0x00, 0xbe, 0x00, 0xa4, 0x00, 0xba, 0x00, 0x87, 0x00, 0xad, 0x00,
0x7b, 0x00, 0xb5, 0x00,
        0x6b, 0x00, 0xae, 0x00, 0x18, 0x00, 0x78, 0x00, 0xd7, 0xff, 0x38, 0x00,
0x78, 0xff, 0xf8, 0xff,
        0x3b, 0xff, 0xbd, 0xff, 0x07, 0xff, 0x90, 0xff, 0xcf, 0xfe, 0x67, 0xff,
0xc0, 0xfe, 0x5f, 0xff,
        0xa6, 0xfe, 0x58, 0xff, 0xb6, 0xfe, 0x60, 0xff, 0xb7, 0xfe, 0x85, 0xff,
0xb9, 0xfe, 0x83, 0xff,
        0xc0, 0xfe, 0x95, 0xff, 0xc5, 0xfe, 0xae, 0xff, 0xf9, 0xfe, 0xce, 0xff,
0x23, 0xff, 0x00, 0x00,
        0x24, 0xff, 0x01, 0x00, 0x34, 0xff, 0x17, 0x00, 0x56, 0xff, 0x2f, 0x00,
0x7a, 0xff, 0x49, 0x00,
        0xb2, 0xff, 0x82, 0x00, 0xe1, 0xff, 0xa5, 0x00, 0xba, 0xff, 0x8c, 0x00,
0x9d, 0xff, 0x6e, 0x00,
        0x9b, 0xff, 0x6b, 0x00, 0x7b, 0xff, 0x3a, 0x00, 0x5c, 0xff, 0x0a, 0x00,
0x57, 0xff, 0xf3, 0xff,
        0x31, 0xff, 0xb9, 0xff, 0x1b, 0xff, 0x9a, 0xff, 0x1c, 0xff, 0x89, 0xff,
0x07, 0xff, 0x55, 0xff,
        0x0d, 0xff, 0x5f, 0xff, 0x17, 0xff, 0x56, 0xff, 0x0b, 0xff, 0x44, 0xff,
0xfe, 0xfe, 0x41, 0xff,
        0xfd, 0xfe, 0x33, 0xff, 0x3b, 0xff, 0x68, 0xff, 0xa3, 0xff, 0xcc, 0xff,
0xf2, 0xff, 0xfa, 0xff,
        0x1b, 0x00, 0x24, 0x00, 0x4b, 0x00, 0x33, 0x00, 0x69, 0x00, 0x46, 0x00,
0xc0, 0x00, 0x85, 0x00,
        0x20, 0x01, 0xd2, 0x00, 0x17, 0x01, 0xb0, 0x00, 0xfd, 0x00, 0x95, 0x00,
0x23, 0x01, 0xae, 0x00,
        0x4d, 0x01, 0xc4, 0x00, 0x61, 0x01, 0xd4, 0x00, 0x4b, 0x01, 0xa1, 0x00,
0x06, 0x01, 0x68, 0x00,
        0xdb, 0x00, 0x21, 0x00, 0x9c, 0x00, 0xda, 0xff, 0x6c, 0x00, 0x8e, 0xff,
0x4b, 0x00, 0x51, 0xff,
        0x32, 0x00, 0x23, 0xff, 0x13, 0x00, 0xee, 0xfe, 0x01, 0x00, 0xc1, 0xfe,
0x18, 0x00, 0xcc, 0xfe,
        0x44, 0x00, 0xce, 0xfe, 0x58, 0x00, 0xf5, 0xfe, 0x6c, 0x00, 0xeb, 0xfe,
0x42, 0x00, 0xc7, 0xfe,
        0x50, 0x00, 0xca, 0xfe, 0x4a, 0x00, 0xc6, 0xfe, 0x23, 0x00, 0xb2, 0xfe,
0x3a, 0x00, 0xd3, 0xfe,
        0x38, 0x00, 0xd7, 0xfe, 0x35, 0x00, 0xe7, 0xfe, 0x5a, 0x00, 0x1a, 0xff,
0x8b, 0x00, 0x5b, 0xff,
        0xc1, 0x00, 0x9a, 0xff, 0xd1, 0x00, 0xb8, 0xff, 0xd0, 0x00, 0xc1, 0xff,
0xe6, 0x00, 0xd3, 0xff,
        0x00, 0x01, 0x01, 0x00, 0x05, 0x01, 0x08, 0x00, 0x12, 0x01, 0x26, 0x00,
0xf9, 0x00, 0x2b, 0x00,
        0xd3, 0x00, 0x1b, 0x00, 0xd2, 0x00, 0x2a, 0x00, 0xaf, 0x00, 0x2a, 0x00,
0x87, 0x00, 0x12, 0x00,
        0x59, 0x00, 0x09, 0x00, 0x0b, 0x00, 0xe1, 0xff, 0xd6, 0xff, 0xc7, 0xff,
0xbc, 0xff, 0xd4, 0xff,
        0xc8, 0xff, 0x00, 0x00, 0xb9, 0xff, 0x02, 0x00, 0x85, 0xff, 0xf5, 0xff,
0x7f, 0xff, 0x00, 0x00,
        0x92, 0xff, 0x33, 0x00, 0x9c, 0xff, 0x4d, 0x00, 0x9c, 0xff, 0x59, 0x00,
0xa5, 0xff, 0x71, 0x00,
        0x94, 0xff, 0x74, 0x00, 0x8c, 0xff, 0x79, 0x00, 0x97, 0xff, 0x90, 0x00,
0xad, 0xff, 0xbb, 0x00,
        0xc9, 0xff, 0xe4, 0x00, 0x01, 0x00, 0x0e, 0x01, 0x2d, 0x00, 0x46, 0x01,
0x4c, 0x00, 0x66, 0x01,
        0x55, 0x00, 0x6e, 0x01, 0x50, 0x00, 0x84, 0x01, 0x3a, 0x00, 0x6b, 0x01,
0x18, 0x00, 0x4c, 0x01,
        0xd3, 0xff, 0x20, 0x01, 0xa0, 0xff, 0xfe, 0x00, 0x69, 0xff, 0xd0, 0x00,
0x2d, 0xff, 0x9c, 0x00,
        0x14, 0xff, 0x91, 0x00, 0x10, 0xff, 0x7c, 0x00, 0x11, 0xff, 0x7c, 0x00,
0x18, 0xff, 0x7f, 0x00,
        0x26, 0xff, 0x8c, 0x00, 0x22, 0xff, 0x8f, 0x00, 0x46, 0xff, 0xbd, 0x00,
0x90, 0xff, 0xfb, 0x00,
        0x93, 0xff, 0x07, 0x01, 0x6f, 0xff, 0xe6, 0x00, 0x66, 0xff, 0xd1, 0x00,
0x4a, 0xff, 0xb7, 0x00,
        0x56, 0xff, 0xae, 0x00, 0x4b, 0xff, 0x89, 0x00, 0x3c, 0xff, 0x5b, 0x00,
0x57, 0xff, 0x5a, 0x00,
        0x68, 0xff, 0x3f, 0x00, 0x86, 0xff, 0x41, 0x00, 0xc2, 0xff, 0x4e, 0x00,
0xf5, 0xff, 0x56, 0x00,
        0x05, 0x00, 0x58, 0x00, 0x2a, 0x00, 0x58, 0x00, 0x13, 0x00, 0x3e, 0x00,
0x1a, 0x00, 0x23, 0x00,
        0x34, 0x00, 0x19, 0x00, 0x33, 0x00, 0x0b, 0x00, 0x1b, 0x00, 0xdb, 0xff,
0x12, 0x00, 0xbf, 0xff,
        0x16, 0x00, 0xb5, 0xff, 0x09, 0x00, 0x95, 0xff, 0x2c, 0x00, 0x9b, 0xff,
0x43, 0x00, 0x96, 0xff,
        0x44, 0x00, 0x91, 0xff, 0x6f, 0x00, 0x93, 0xff, 0x7e, 0x00, 0x9a, 0xff,
0x83, 0x00, 0x7e, 0xff,
        0x92, 0x00, 0x75, 0xff, 0xa1, 0x00, 0x62, 0xff, 0xc5, 0x00, 0x64, 0xff,
0xe8, 0x00, 0x78, 0xff,
        0xf9, 0x00, 0x67, 0xff, 0xeb, 0x00, 0x4c, 0xff, 0x04, 0x01, 0x46, 0xff,
0x0a, 0x01, 0x3e, 0xff,
        0x45, 0x01, 0x6e, 0xff, 0x85, 0x01, 0xa1, 0xff, 0xa8, 0x01, 0xc3, 0xff,
0xe3, 0x01, 0xf7, 0xff,
        0x0d, 0x02, 0x26, 0x00, 0x39, 0x02, 0x42, 0x00, 0x37, 0x02, 0x54, 0x00,
0x15, 0x02, 0x41, 0x00,
        0xff, 0x01, 0x26, 0x00, 0xbf, 0x01, 0x04, 0x00, 0x8b, 0x01, 0xe5, 0xff,
0x45, 0x01, 0xc6, 0xff,
        0x1a, 0x01, 0xc0, 0xff, 0xf5, 0x00, 0xc9, 0xff, 0xd6, 0x00, 0xc4, 0xff,
0xc7, 0x00, 0xce, 0xff,
        0xbd, 0x00, 0xdf, 0xff, 0xe9, 0x00, 0x1d, 0x00, 0x00, 0x01, 0x3c, 0x00,
0xd4, 0x00, 0x38, 0x00,
        0xbc, 0x00, 0x24, 0x00, 0xae, 0x00, 0x23, 0x00, 0x94, 0x00, 0x2c, 0x00,
0x6b, 0x00, 0x0f, 0x00,
        0x13, 0x00, 0xec, 0xff, 0x05, 0x00, 0xef, 0xff, 0xeb, 0xff, 0xe6, 0xff,
0xd5, 0xff, 0xef, 0xff,
        0xe3, 0xff, 0xfb, 0xff, 0xc6, 0xff, 0x06, 0x00, 0xc8, 0xff, 0x0d, 0x00,
0xe0, 0xff, 0x35, 0x00,
        0xe6, 0xff, 0x49, 0x00, 0xeb, 0xff, 0x55, 0x00, 0xc8, 0xff, 0x53, 0x00,
0xb1, 0xff, 0x4b, 0x00,
        0x9d, 0xff, 0x39, 0x00, 0x81, 0xff, 0x3c, 0x00, 0x51, 0xff, 0x23, 0x00,
0x1d, 0xff, 0x0d, 0x00,
        0x15, 0xff, 0x12, 0x00, 0xfe, 0xfe, 0x05, 0x00, 0xcd, 0xfe, 0xed, 0xff,
0xca, 0xfe, 0xf7, 0xff,
        0xd8, 0xfe, 0x10, 0x00, 0xf2, 0xfe, 0x2e, 0x00, 0xe2, 0xfe, 0x27, 0x00,
0xca, 0xfe, 0x1e, 0x00,
        0xd4, 0xfe, 0x2e, 0x00, 0xd8, 0xfe, 0x3c, 0x00, 0xd5, 0xfe, 0x3a, 0x00,
0xbe, 0xfe, 0x2d, 0x00,
        0xad, 0xfe, 0x1a, 0x00, 0xa0, 0xfe, 0x11, 0x00, 0xa3, 0xfe, 0x10, 0x00,
0x97, 0xfe, 0x0b, 0x00,
        0x8c, 0xfe, 0x01, 0x00, 0xa3, 0xfe, 0x0a, 0x00, 0xd3, 0xfe, 0x34, 0x00,
0xe2, 0xfe, 0x30, 0x00,
        0xd7, 0xfe, 0x22, 0x00, 0xeb, 0xfe, 0x27, 0x00, 0xff, 0xfe, 0x2a, 0x00,
0x19, 0xff, 0x2a, 0x00,
        0x0b, 0xff, 0x14, 0x00, 0x00, 0xff, 0xe9, 0xff, 0xef, 0xfe, 0xbe, 0xff,
0xe1, 0xfe, 0x94, 0xff,
        0x19, 0xff, 0x9c, 0xff, 0x3b, 0xff, 0x98, 0xff, 0x5e, 0xff, 0x91, 0xff,
0x94, 0xff, 0x9b, 0xff,
        0xc3, 0xff, 0xb4, 0xff, 0x04, 0x00, 0xd0, 0xff, 0x2f, 0x00, 0xe4, 0xff,
0x79, 0x00, 0x04, 0x00,
        0xa8, 0x00, 0x26, 0x00, 0xb2, 0x00, 0x11, 0x00, 0xcc, 0x00, 0x18, 0x00,
0xdc, 0x00, 0x10, 0x00,
        0xce, 0x00, 0xfd, 0xff, 0x03, 0x01, 0x08, 0x00, 0x37, 0x01, 0x3a, 0x00,
0x23, 0x01, 0x12, 0x00,
        0x22, 0x01, 0xfe, 0xff, 0x21, 0x01, 0xf6, 0xff, 0x4b, 0x01, 0x04, 0x00,
0x71, 0x01, 0x1a, 0x00,
        0x69, 0x01, 0x01, 0x00, 0x43, 0x01, 0xd7, 0xff, 0x3a, 0x01, 0xb9, 0xff,
0x50, 0x01, 0xb0, 0xff,
};

void
dump_opus_packet(uint8_t const * const bb, unsigned int const uiLen) {
    unsigned int ui = 0;

    printf("Packet size: 0x%2x\n", uiLen);

    do {
        printf("%02x %02x %02x %02x %02x %02x %02x %02x\n",
                bb[ui+0], bb[ui+1], bb[ui+2], bb[ui+3], bb[ui+4], bb[ui+5],
bb[ui+6], bb[ui+7]);

        ui += 8;
    } while (ui < uiLen);
}


void opus_encode_known_packet() {
    int rv = 0;

    OpusEncoder *oeEncoder;
    int iiBytesEncoded;

    uint8_t bbOpusBits[128] __attribute__((aligned (8)));

    memset(bbOpusBits, 0x00, 128);

    oeEncoder = opus_encoder_create(48000, 2,
OPUS_APPLICATION_RESTRICTED_LOWDELAY, &rv);
    assert(rv == 0);

    rv = opus_encoder_ctl(oeEncoder, OPUS_SET_BITRATE(32000));
    assert(rv == 0);

    rv = opus_encoder_ctl(oeEncoder, OPUS_SET_COMPLEXITY(5));
    assert(rv == 0);

    iiBytesEncoded = opus_encode(oeEncoder, bbKnownBuffer, 480, bbOpusBits,
128);

    printf("Encoded to bytes: %2x\n", iiBytesEncoded);
    dump_opus_packet(bbOpusBits, iiBytesEncoded);


    opus_encoder_destroy(oeEncoder);
}



int main(void) {
    opus_encode_known_packet();

    return 0;
}



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Andrew Lentvorski

2015-Jul-19 16:50 UTC

head link

[opus] Bug in ARM fixed-point ASM?

On 7/19/15, 3:37 AM, Andrew Lentvorski wrote:
> Configure for Raspberry Pi 2 (compiled on the Pi itself):
> ./configure --host=arm-linux-androideabi --enable-fixed-point
--enable-custom-modes --enable-assertions --enable-fixed-point-debug
And, of course, I miscopied the line, it was actually:

root at jessie-rpi:~# history | grep debug
   64  ./configure --enable-fixed-point --enable-custom-modes
--enable-assertions --enable-fixed-point-debug

and I was being so careful to be accurate.  Sigh.

-a


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Andrew Lentvorski

2015-Jul-19 23:32 UTC

head link

[opus] Bug in ARM fixed-point ASM?

More data:

On My OS X machine, with no ASM, I get the following result which agrees
with the Raspberry Pi 2:

$ ./encode_known_packet
Encoded to bytes: 29
Packet size: 0x29
d0 7f 29 1a fa 2b 33 81
70 22 58 6a 3b 0f 3f b5
66 ff ce da 93 9b c2 e9
f1 7a d0 61 fc 0e a6 75
9c 2b 8e 14 92 d6 20 09
c6 00 00 00 00 00 00 00

"make check" indicates 12 tests all passed.

It looks like this is an Opus ARM ASM bug which manifests on Android.

I need to check if this is in the decode side as well as whether it
makes an appreciable audible difference.

Thanks,
-a


From OS X:
------------------------------------------------------------------------
  opus 1.1.1-beta-38-gfc0276f:  Automatic configuration OK.

    Compiler support:

      C99 var arrays: ................ yes
      C99 lrintf: .................... yes
      Use alloca: .................... no (using var arrays)

    General configuration:

      Floating point support: ........ yes
      Fast float approximations: ..... no
      Fixed point debugging: ......... no
      Inline Assembly Optimizations: . No inline ASM for your platform,
please send patches
      External Assembly Optimizations:
      Intrinsics Optimizations.......: no
      Run-time CPU detection: ........ no
      Custom modes: .................. no
      Assertion checking: ............ no
      Fuzzing: ....................... no

      API documentation: ............. yes
      Extra programs: ................ yes
------------------------------------------------------------------------

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Andrew Lentvorski

2015-Jul-21 00:41 UTC

head link

[opus] Bug in ARM fixed-point ASM?

Further information:  This is a "bug", but it doesn't seem to make
a
significant impact on playback.   Although, I'm encoding to 32000
compressed with 10ms, so my quality isn't great to begin with.

-a

On 7/19/15, 4:32 PM, Andrew Lentvorski wrote:> More data:
> 
> On My OS X machine, with no ASM, I get the following result which agrees
> with the Raspberry Pi 2:
> 
> $ ./encode_known_packet
> Encoded to bytes: 29
> Packet size: 0x29
> d0 7f 29 1a fa 2b 33 81
> 70 22 58 6a 3b 0f 3f b5
> 66 ff ce da 93 9b c2 e9
> f1 7a d0 61 fc 0e a6 75
> 9c 2b 8e 14 92 d6 20 09
> c6 00 00 00 00 00 00 00
> 
> "make check" indicates 12 tests all passed.
> 
> It looks like this is an Opus ARM ASM bug which manifests on Android.
> 
> I need to check if this is in the decode side as well as whether it
> makes an appreciable audible difference.
> 
> Thanks,
> -a
> 
> 
> From OS X:
> ------------------------------------------------------------------------
>   opus 1.1.1-beta-38-gfc0276f:  Automatic configuration OK.
> 
>     Compiler support:
> 
>       C99 var arrays: ................ yes
>       C99 lrintf: .................... yes
>       Use alloca: .................... no (using var arrays)
> 
>     General configuration:
> 
>       Floating point support: ........ yes
>       Fast float approximations: ..... no
>       Fixed point debugging: ......... no
>       Inline Assembly Optimizations: . No inline ASM for your platform,
> please send patches
>       External Assembly Optimizations:
>       Intrinsics Optimizations.......: no
>       Run-time CPU detection: ........ no
>       Custom modes: .................. no
>       Assertion checking: ............ no
>       Fuzzing: ....................... no
> 
>       API documentation: ............. yes
>       Extra programs: ................ yes
> ------------------------------------------------------------------------
> 
> 
> 
> _______________________________________________
> opus mailing list
> opus at xiph.org
> http://lists.xiph.org/mailman/listinfo/opus
> 
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Timothy B. Terriberry

2015-Jul-26 10:29 UTC

head link

[opus] Bug in ARM fixed-point ASM?

Andrew Lentvorski wrote:> On My OS X machine, with no ASM, I get the following result which agrees
> with the Raspberry Pi 2:
In general, the inline ARM asm does not match the generic C fixed-point 
implementation, because ARMv5E does not have a 16x32->32 Q15 multiply. 
This is instead implemented using smulwb (a 16x32->32 Q16 multiply) 
followed by a left-shift by one, losing one LSB of the result. This has 
been tested and shows no discernible impact on quality.

What is less clear to me is why your two ARM devices differ, as the only 
distinction is whether ARMv6 Media instructions are enabled in the 
inline asm. The only extra function this currently adds is 
SIG2WORD16_armv6(), which should be a bit-exact match with the C version.

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