IEngineSound->EmitSound() buffer?

Hey guys,

I know I'm the only c++ programmer here, but idk where else to go (I'm banned everywhere else lol).

I could use some help for an extension I am developing. As you know, the Valve Source SDK EmitSound() is virtualized by IEngineSound.

Code:

virtual void EmitSound( IRecipientFilter& filter, int iEntIndex, int iChannel, const char *pSample, float flVolume, float flAttenuation, int iFlags = 0, int iPitch = PITCH_NORM, const Vector *pOrigin = NULL, const Vector *pDirection = NULL, CUtlVector< Vector >* pUtlVecOrigins = NULL, bool bUpdatePositions = true, float soundtime = 0.0f, int speakerentity = -1 ) = 0;

I know I could pass a filename through an SM command like so:

Code:

char* pSample = NULL; pCtx->LocalToString(pParams[1], &pSample);

However, let's say I have a bit buffer like so, and I fill it with my streaming system:

Code:

extern byte* pBufferSnd;
Luke::getSingleton()->LuKeAudio->FillBuffer(pBufferSnd, &g_paStream, pStreamURL);

Now I create a networkable entity and fill it with my bit buffer data and send it to the clients. So far, so good. Now, how will I playback the networked data?

Code:

byte* pSound;
soundengine->EmitSound( ... ); // does not support buffers

I'm at a bind. Any ideas?

 

Nevermind, I found out that byte buffers can't be networked easily in Source Engine, since Valve server->client data transfer sucks.

New problem I would like some help with. You know what would be awesome? A PR skill that shields you from boomer vomit once. Basically, you'll still get vomited and turn purple, but your screen won't be blurred green. We have not managed to get this one working because a) PR is written in Pawn and can't detour an external function w/o c++, and b) what function can we detour anyway?

So I decided to get my lazy ass up and start searching for a detourable function and found several nice ones we can try--

AbilityVomitIgnored():

Code:

002b555d <_Z15ServerClassInitIN15DT_AbilityVomit7ignoredEEiPT_>:
  2b555d:    55                       push   %ebp
  2b555e:    89 e5                    mov    %esp,%ebp
  2b5560:    57                       push   %edi
  2b5561:    56                       push   %esi
  2b5562:    53                       push   %ebx
  2b5563:    83 ec 3c                 sub    $0x3c,%esp
  2b5566:    e8 75 9e ec ff           call   17f3e0 <__i686.get_pc_thunk.bx>
  2b556b:    81 c3 45 a0 b1 00        add    $0xb1a045,%ebx
  2b5571:    8d b3 c4 cb 08 00        lea    0x8cbc4(%ebx),%esi
  2b5577:    80 bb 50 cb 08 00 00     cmpb   $0x0,0x8cb50(%ebx)
  2b557e:    75 18                    jne    2b5598 <_Z15ServerClassInitIN15DT_AbilityVomit7ignoredEEiPT_+0x3b>
  2b5580:    8d bb 50 cb 08 00        lea    0x8cb50(%ebx),%edi
  2b5586:    89 3c 24                 mov    %edi,(%esp)
  2b5589:    e8 be 99 ec ff           call   17ef4c <__cxa_guard_acquire@plt>
  2b558e:    8d b3 c4 cb 08 00        lea    0x8cbc4(%ebx),%esi
  2b5594:    85 c0                    test   %eax,%eax
  2b5596:    75 31                    jne    2b55c9 <_Z15ServerClassInitIN15DT_AbilityVomit7ignoredEEiPT_+0x6c>

  ...

StopVomitEffect Ev:

Code:

002b6122 <_ZN6CVomit15StopVomitEffectEv>:
  2b6122:    55                       push   %ebp
  2b6123:    89 e5                    mov    %esp,%ebp
  2b6125:    57                       push   %edi
  2b6126:    56                       push   %esi
  2b6127:    53                       push   %ebx
  2b6128:    81 ec 8c 00 00 00        sub    $0x8c,%esp
  2b612e:    e8 ad 92 ec ff           call   17f3e0 <__i686.get_pc_thunk.bx>
  2b6133:    81 c3 7d 94 b1 00        add    $0xb1947d,%ebx
  2b6139:    8b 4d 08                 mov    0x8(%ebp),%ecx
  2b613c:    8b 83 18 f4 ff ff        mov    -0xbe8(%ebx),%eax
  2b6142:    8b 10                    mov    (%eax),%edx
  2b6144:    8b 81 40 04 00 00        mov    0x440(%ecx),%eax
  2b614a:    83 f8 ff                 cmp    $0xffffffff,%eax
  2b614d:    74 18                    je     2b6167 <_ZN6CVomit15StopVomitEffectEv+0x45>
  2b614f:    89 c7                    mov    %eax,%edi
  2b6151:    81 e7 ff 0f 00 00        and    $0xfff,%edi
  2b6157:    c1 e7 04                 shl    $0x4,%edi
  2b615a:    8d 34 3a                 lea    (%edx,%edi,1),%esi

  ...

If anyone is good at assembly language, can someone tell me what parameters this function has

 

This can't be done with Pawn. HC tried to use SDKTools/Hooks to attach to a signature and then modify it, but that does not work. The function must be completely detoured and blocked with c++. I'll try it out when I get a chance.