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winamp/Src/Winamp/WavEncoder.cpp

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#include "main.h"
#include "../nsv/enc_if.h"
#include <mmreg.h>
#include <msacm.h>
#include "WavEncoder.h"
void initWfx();
#define BUFSIZE 0x20000
extern EXT_WFX convert_wfx;
extern WAVEFORMATEX wfx_default;
static DWORD FileTell(HANDLE hFile) { return SetFilePointer(hFile, 0, 0, FILE_CURRENT);}
static void FileAlign(HANDLE hFile) {if (FileTell(hFile)&1) SetFilePointer(hFile, 1, 0, FILE_CURRENT);}
#define rev32(X) ((((DWORD)(X)&0xFF)<<24)|(((DWORD)(X)&0xFF00)<<8)|(((DWORD)(X)&0xFF0000)>>8)|(((DWORD)(X)&0xFF000000)>>24))
WavEncoder::WavEncoder(int srate, int nch, int bps, int res_srate , int res_bps, int res_nch )
{
m_did_header = 0;
m_srate = srate;
m_nch = nch;
m_bps = bps;
m_error = 0;
hStream = 0;
hStreamResample = 0;
//_asm { int 3 };
m_acm_resample_buf = NULL;
m_acm_resample_outbuf = NULL;
m_bytes_done = 0;
m_hlen = 0;
m_nsam = 0;
if (res_srate && (res_srate != srate || res_bps != bps || res_nch != nch))
{
//manual resample (ie: burning)
m_acm_buf = (unsigned char *)malloc(BUFSIZE);
m_acm_outbuf = (unsigned char *)malloc(BUFSIZE);
m_bytes_inbuf = 0;
m_bytes_outbuf = 0;
m_wfx_src.wFormatTag = WAVE_FORMAT_PCM;
m_wfx_src.nChannels = nch;
m_wfx_src.nSamplesPerSec = srate;
m_wfx_src.nAvgBytesPerSec = srate * nch * (bps >> 3);
m_wfx_src.nBlockAlign = nch * (bps >> 3);
m_wfx_src.wBitsPerSample = bps;
m_wfx_src.cbSize = 0;
m_convert_wfx.wfx = wfx_default;
m_convert_wfx.wfx.nSamplesPerSec = res_srate;
m_convert_wfx.wfx.nChannels = res_nch;
m_convert_wfx.wfx.wBitsPerSample = res_bps;
m_convert_wfx.wfx.nAvgBytesPerSec = res_srate * res_nch * (res_bps / 8);
m_convert_wfx.wfx.nBlockAlign = res_nch * (res_bps / 8);
m_convert_wfx.wfx.cbSize = 0;
MMRESULT rs = acmStreamOpen(&hStream, 0, &m_wfx_src, &m_convert_wfx.wfx, 0, 0, 0, ACM_STREAMOPENF_NONREALTIME);
if (rs || !hStream)
{
m_error = 1;
return ;
}
ZeroMemory(&ahd, sizeof(ahd));
ahd.cbStruct = sizeof(ahd);
ahd.pbSrc = m_acm_buf;
ahd.cbSrcLength = BUFSIZE;
ahd.pbDst = m_acm_outbuf;
ahd.cbDstLength = BUFSIZE;
if (acmStreamPrepareHeader(hStream, &ahd, 0)) m_error = 1;
return ;
}
//resample defined in config
// fucko: don't use compression settings if we're in a sep process, just generate raw wav
// sep process isn't the best way, but we'll give it a shot
if (!config_wav_convert)
{
m_acm_buf = NULL;
m_acm_outbuf = NULL;
}
else
{
m_acm_buf = (unsigned char *)malloc(BUFSIZE);
m_acm_outbuf = (unsigned char *)malloc(BUFSIZE);
m_bytes_inbuf = 0;
m_bytes_outbuf = 0;
initWfx();
m_convert_wfx = convert_wfx;
m_wfx_src.wFormatTag = WAVE_FORMAT_PCM;
m_wfx_src.nChannels = nch;
m_wfx_src.nSamplesPerSec = srate;
m_wfx_src.nAvgBytesPerSec = srate * nch * (bps >> 3);
m_wfx_src.nBlockAlign = nch * (bps >> 3);
m_wfx_src.wBitsPerSample = bps;
m_wfx_src.cbSize = 0;
MMRESULT rs = acmStreamOpen(&hStream, 0, &m_wfx_src, &m_convert_wfx.wfx, 0, 0, 0, ACM_STREAMOPENF_NONREALTIME);
if (rs)
{
// need resampling
WAVEFORMATEX wfx1;
ZeroMemory(&wfx1, sizeof(wfx1));
wfx1.wFormatTag = WAVE_FORMAT_PCM;
if (acmFormatSuggest(0, &m_convert_wfx.wfx, &wfx1, sizeof(WAVEFORMATEX), ACM_FORMATSUGGESTF_WFORMATTAG)) m_error = 1;
else if (acmStreamOpen(&hStream, 0, &wfx1, &m_convert_wfx.wfx, 0, 0, 0, ACM_STREAMOPENF_NONREALTIME)) m_error = 1;
else if (acmStreamOpen(&hStreamResample, 0, &m_wfx_src, &wfx1, 0, 0, 0, ACM_STREAMOPENF_NONREALTIME)) m_error = 1;
else
{
ZeroMemory(&ahdResample, sizeof(ahdResample));
ahdResample.cbStruct = sizeof(ahdResample);
ahdResample.pbSrc = m_acm_resample_buf = (unsigned char *)malloc(BUFSIZE);
ahdResample.cbSrcLength = BUFSIZE;
ahdResample.pbDst = m_acm_resample_outbuf = (unsigned char *)malloc(BUFSIZE);
ahdResample.cbDstLength = BUFSIZE;
if (acmStreamPrepareHeader(hStreamResample, &ahdResample, 0)) m_error = 1;
m_bytes_inbuf_resample = 0;
m_bytes_outbuf_resample = 0;
}
}
if (!hStream)
{
m_error = 1;
return ;
}
ZeroMemory(&ahd, sizeof(ahd));
ahd.cbStruct = sizeof(ahd);
ahd.pbSrc = m_acm_buf;
ahd.cbSrcLength = BUFSIZE;
ahd.pbDst = m_acm_outbuf;
ahd.cbDstLength = BUFSIZE;
if (acmStreamPrepareHeader(hStream, &ahd, 0)) m_error = 1;
}
}
WavEncoder::~WavEncoder()
{
free(m_acm_buf);
free(m_acm_outbuf);
free(m_acm_resample_buf);
free(m_acm_resample_outbuf);
if (hStream)
{
if (ahd.fdwStatus & ACMSTREAMHEADER_STATUSF_PREPARED) acmStreamUnprepareHeader(hStream, &ahd, 0);
acmStreamClose(hStream, 0);
}
if (hStreamResample)
{
if (ahdResample.fdwStatus & ACMSTREAMHEADER_STATUSF_PREPARED) acmStreamUnprepareHeader(hStreamResample, &ahdResample, 0);
acmStreamClose(hStreamResample, 0);
}
}
int WavEncoder::Encode(int framepos, void *in, int in_avail, int *in_used, void *out, int out_avail)
{
char *pin = (char *)in;
char *pout = (char *)out;
int retval = 0;
if (!m_did_header && config_wav_do_header)
{
int s = 44;
if (hStream)
{
s = 4 + 4 + 12 - 4;
int t;
if (m_convert_wfx.wfx.wFormatTag == WAVE_FORMAT_PCM) t = 0x10;
else t = sizeof(WAVEFORMATEX) + m_convert_wfx.wfx.cbSize;
s += 4 + t;
if (s&1) s++;
if (m_convert_wfx.wfx.wFormatTag != WAVE_FORMAT_PCM)
s += 12;
s += 8;
}
if (out_avail < s) return 0;
//xx bytes of randomness
m_hlen = s;
m_did_header = 1;
out_avail -= s;
pout += s;
retval = s;
}
if (!hStream)
{
//no ACM conversion
int l = min(out_avail, in_avail);
memcpy(pout, pin, l);
*in_used = l;
m_bytes_done += l;
return l;
}
if (!m_bytes_outbuf)
{
if (hStreamResample)
{
if (!m_bytes_outbuf_resample)
{
DWORD flags = ACM_STREAMCONVERTF_BLOCKALIGN;
int l = min(in_avail, BUFSIZE - m_bytes_inbuf_resample);
if (l < 0) l = 0;
if (l > 0) memcpy(m_acm_resample_buf + m_bytes_inbuf_resample, in, l);
m_bytes_inbuf_resample += l;
*in_used = l;
m_nsam += l;
ahdResample.cbSrcLength = m_bytes_inbuf_resample;
acmStreamConvert(hStreamResample, &ahdResample, flags);
m_bytes_inbuf_resample -= ahdResample.cbSrcLengthUsed;
memcpy(m_acm_resample_buf, m_acm_resample_buf + ahdResample.cbSrcLengthUsed, m_bytes_inbuf_resample); //memmove
m_bytes_outbuf_resample = ahdResample.cbDstLengthUsed;
}
in = (void*)m_acm_resample_outbuf;
in_avail = m_bytes_outbuf_resample;
m_bytes_outbuf_resample = 0;
in_used = NULL;
}
DWORD flags = ACM_STREAMCONVERTF_BLOCKALIGN;
int l = min(in_avail, BUFSIZE - m_bytes_inbuf);
if (l < 0) l = 0;
if (l > 0) memcpy(m_acm_buf + m_bytes_inbuf, in, l);
m_bytes_inbuf += l;
if (in_used)
{
*in_used = l;
m_nsam += l;
}
if (m_bytes_inbuf)
{
ahd.cbSrcLength = m_bytes_inbuf;
acmStreamConvert(hStream, &ahd, flags);
m_bytes_inbuf -= ahd.cbSrcLengthUsed;
memcpy(m_acm_buf, m_acm_buf + ahd.cbSrcLengthUsed, m_bytes_inbuf); //memmove
m_bytes_outbuf = ahd.cbDstLengthUsed;
m_bytes_done += l;
}
}
if (m_bytes_outbuf)
{
int l = min(out_avail, m_bytes_outbuf);
memcpy(pout, m_acm_outbuf, l);
m_bytes_outbuf -= l;
memcpy(m_acm_outbuf, m_acm_outbuf + l, m_bytes_outbuf);
retval += l;
}
return retval;
}
void WavEncoder::FinishAudio(HANDLE fh, WavEncoder *coder)
{
if (!config_wav_do_header) return ;
int len, i;
const unsigned char ispred1[4] = {0x52 , 0x49 , 0x46 , 0x46 };
const unsigned char ispred2[12] = {0x57, 0x41 , 0x56 , 0x45 , 0x66 , 0x6d , 0x74 , 0x20 , 0x10 , 0x0 , 0x0 , 0x0 };
char c;
int bps = coder->m_bps;
int srate = coder->m_srate;
int nch = coder->m_nch;
len = coder->m_bytes_done;
DWORD a;
FileAlign(fh);
SetFilePointer(fh, 0, 0, FILE_BEGIN);
WriteFile(fh, ispred1, sizeof(ispred1), &a, NULL);
i = len + (m_hlen) - 8;
if (i&1) i++;
WriteFile(fh, &i, 4, &a, NULL);
WriteFile(fh, ispred2, sizeof(ispred2) - (hStream ? 4 : 0), &a, NULL);
if (!hStream)
{
c = 1;
WriteFile(fh, &c, 1, &a, NULL);
c = 0;
WriteFile(fh, &c, 1, &a, NULL);
c = nch;
WriteFile(fh, &c, 1, &a, NULL);
c = 0;
WriteFile(fh, &c, 1, &a, NULL);
for (i = 0;i < 32;i += 8)
{
c = (srate >> i) & 0xff;
WriteFile(fh, &c, 1, &a, NULL);
}
int tmp = srate * nch * (bps / 8);
for (i = 0;i < 32;i += 8)
{
c = (tmp >> i) & 0xff;
WriteFile(fh, &c, 1, &a, NULL);
}
tmp = (bps / 8) * nch;
for (i = 0;i < 16;i += 8)
{
c = (tmp >> i) & 0xff;
WriteFile(fh, &c, 1, &a, NULL);
}
c = bps;
WriteFile(fh, &c, 1, &a, NULL);
c = 0;
WriteFile(fh, &c, 1, &a, NULL);
const unsigned char iza[4] = {0x64 , 0x61 , 0x74 , 0x61};
WriteFile(fh, iza, 4, &a, NULL);
for (i = 0;i < 32;i += 8)
{
c = (len >> i) & 0xff;
WriteFile(fh, &c, 1, &a, NULL);
}
}
else
{
int t;
if (m_convert_wfx.wfx.wFormatTag == WAVE_FORMAT_PCM) t = 0x10;
else t = sizeof(WAVEFORMATEX) + m_convert_wfx.wfx.cbSize;
WriteFile(fh, &t, 4, &a, 0);
WriteFile(fh, &m_convert_wfx.wfx, t, &a, 0);
FileAlign(fh);
DWORD fact_ofs = 0;
if (m_convert_wfx.wfx.wFormatTag != WAVE_FORMAT_PCM)
{
t = rev32('fact');
WriteFile(fh, &t, 4, &a, 0);
t = 4;
WriteFile(fh, &t, 4, &a, 0);
fact_ofs = FileTell(fh);
SetFilePointer(fh, 4, 0, FILE_CURRENT);
}
t = rev32('data');
WriteFile(fh, &t, 4, &a, 0);
DWORD data_ofs = FileTell(fh);
{
DWORD t, bw;
SetFilePointer(fh, 4, 0, FILE_BEGIN);
t = GetFileSize(fh, 0) - 8;
WriteFile(fh, &t, 4, &bw, 0);
DWORD data_size = GetFileSize(fh, 0) - (data_ofs + 4);
SetFilePointer(fh, data_ofs, 0, FILE_BEGIN);
WriteFile(fh, &data_size, 4, &bw, 0);
if (fact_ofs)
{
SetFilePointer(fh, fact_ofs, 0, FILE_BEGIN);
t = coder->m_nsam / ((coder->m_bps >> 3) * coder->m_nch);
WriteFile(fh, &t, 4, &bw, 0);
}
}
}
}
int WavEncoder::GetLastError() { return m_error; }
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