cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

audio_win_int.c (3172B)

      1/* public domain */
      2
      3#include "qemu/osdep.h"
      4#include "qemu-common.h"
      5
      6#define AUDIO_CAP "win-int"
      7#include <windows.h>
      8#include <mmreg.h>
      9#include <mmsystem.h>
     10
     11#include "audio.h"
     12#include "audio_int.h"
     13#include "audio_win_int.h"
     14
     15int waveformat_from_audio_settings (WAVEFORMATEX *wfx,
     16                                    struct audsettings *as)
     17{
     18    memset (wfx, 0, sizeof (*wfx));
     19
     20    wfx->nChannels = as->nchannels;
     21    wfx->nSamplesPerSec = as->freq;
     22    wfx->nAvgBytesPerSec = as->freq << (as->nchannels == 2);
     23    wfx->nBlockAlign = 1 << (as->nchannels == 2);
     24    wfx->cbSize = 0;
     25
     26    switch (as->fmt) {
     27    case AUDIO_FORMAT_S8:
     28    case AUDIO_FORMAT_U8:
     29        wfx->wFormatTag = WAVE_FORMAT_PCM;
     30        wfx->wBitsPerSample = 8;
     31        break;
     32
     33    case AUDIO_FORMAT_S16:
     34    case AUDIO_FORMAT_U16:
     35        wfx->wFormatTag = WAVE_FORMAT_PCM;
     36        wfx->wBitsPerSample = 16;
     37        wfx->nAvgBytesPerSec <<= 1;
     38        wfx->nBlockAlign <<= 1;
     39        break;
     40
     41    case AUDIO_FORMAT_S32:
     42    case AUDIO_FORMAT_U32:
     43        wfx->wFormatTag = WAVE_FORMAT_PCM;
     44        wfx->wBitsPerSample = 32;
     45        wfx->nAvgBytesPerSec <<= 2;
     46        wfx->nBlockAlign <<= 2;
     47        break;
     48
     49    case AUDIO_FORMAT_F32:
     50        wfx->wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
     51        wfx->wBitsPerSample = 32;
     52        wfx->nAvgBytesPerSec <<= 2;
     53        wfx->nBlockAlign <<= 2;
     54        break;
     55
     56    default:
     57        dolog("Internal logic error: Bad audio format %d\n", as->fmt);
     58        return -1;
     59    }
     60
     61    return 0;
     62}
     63
     64int waveformat_to_audio_settings (WAVEFORMATEX *wfx,
     65                                  struct audsettings *as)
     66{
     67    if (!wfx->nSamplesPerSec) {
     68        dolog ("Invalid wave format, frequency is zero\n");
     69        return -1;
     70    }
     71    as->freq = wfx->nSamplesPerSec;
     72
     73    switch (wfx->nChannels) {
     74    case 1:
     75        as->nchannels = 1;
     76        break;
     77
     78    case 2:
     79        as->nchannels = 2;
     80        break;
     81
     82    default:
     83        dolog (
     84            "Invalid wave format, number of channels is not 1 or 2, but %d\n",
     85            wfx->nChannels
     86            );
     87        return -1;
     88    }
     89
     90    if (wfx->wFormatTag == WAVE_FORMAT_PCM) {
     91        switch (wfx->wBitsPerSample) {
     92        case 8:
     93            as->fmt = AUDIO_FORMAT_U8;
     94            break;
     95
     96        case 16:
     97            as->fmt = AUDIO_FORMAT_S16;
     98            break;
     99
    100        case 32:
    101            as->fmt = AUDIO_FORMAT_S32;
    102            break;
    103
    104        default:
    105            dolog("Invalid PCM wave format, bits per sample is not "
    106                  "8, 16 or 32, but %d\n",
    107                  wfx->wBitsPerSample);
    108            return -1;
    109        }
    110    } else if (wfx->wFormatTag == WAVE_FORMAT_IEEE_FLOAT) {
    111        switch (wfx->wBitsPerSample) {
    112        case 32:
    113            as->fmt = AUDIO_FORMAT_F32;
    114            break;
    115
    116        default:
    117            dolog("Invalid IEEE_FLOAT wave format, bits per sample is not "
    118                  "32, but %d\n",
    119                  wfx->wBitsPerSample);
    120            return -1;
    121        }
    122    } else {
    123        dolog("Invalid wave format, tag is not PCM and not IEEE_FLOAT, "
    124              "but %d\n",
    125              wfx->wFormatTag);
    126        return -1;
    127    }
    128
    129    return 0;
    130}
    131