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player.c
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player.c
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#include <stdio.h>
#include <stdbool.h>
#include <math.h>
#include <windows.h>
#include <vorbis/vorbisfile.h>
#define WAV_BUF_CNT (2) // Dual buffer
#define WAV_BUF_TME (1000) // The expected playtime of the buffer in milliseconds: 1000ms
#define WAV_BUF_LEN (44100*2*2*(WAV_BUF_TME/1000)) // 44100Hz, 16-bit, 2-channel, 1 second buffer
bool plr_run = false;
bool plr_bsy = false;
unsigned int plr_len = 0;
float plr_vol[2] = {1.0, 1.0}; // Left, Right
HWAVEOUT plr_hw = NULL;
HANDLE plr_ev = NULL;
OggVorbis_File plr_vf = {0};
WAVEFORMATEX plr_fmt = {0};
int plr_que = 0;
int plr_sta[WAV_BUF_CNT] = {0};
WAVEHDR plr_hdr[WAV_BUF_CNT] = {0};
char plr_buf[WAV_BUF_CNT][WAV_BUF_LEN] __attribute__ ((aligned(4)));
void plr_volume(int vol_l, int vol_r)
{
if (vol_l < 0 || vol_l > 99) plr_vol[0] = 1.0;
else plr_vol[0] = vol_l / 100.0;
if (vol_r < 0 || vol_r > 99) plr_vol[1] = 1.0;
else plr_vol[1] = vol_r / 100.0;
}
unsigned int plr_length(const char *path) // in millisecond
{
OggVorbis_File vf;
if (ov_fopen(path, &vf) != 0) return 0;
unsigned int ret = (unsigned int)(ov_time_total(&vf, -1) * 1000);
ov_clear(&vf);
return ret;
}
// plr_reset() should only be called by the thread itself!
void plr_reset(BOOL wait) // Wait for remaining buffer to drain or not.
{
if (plr_vf.datasource) {
ov_clear(&plr_vf);
}
if (plr_hw) {
if (wait) {
for (int n = 0; n < WAV_BUF_CNT; n++, plr_que = (plr_que+1) % WAV_BUF_CNT) {
if (!(plr_hdr[plr_que].dwFlags & WHDR_DONE)) WaitForSingleObject(plr_ev, WAV_BUF_TME);
}
}
waveOutReset(plr_hw);
for (int i = 0; i < WAV_BUF_CNT; i++) {
waveOutUnprepareHeader(plr_hw, &plr_hdr[i], sizeof(WAVEHDR));
}
waveOutClose(plr_hw);
plr_hw = NULL;
}
if (plr_ev) {
CloseHandle(plr_ev);
plr_ev = NULL;
}
}
int plr_play(const char *path, unsigned int from, unsigned int to)
{
if (ov_fopen(path, &plr_vf) != 0) return 0;
vorbis_info *vi = ov_info(&plr_vf, -1);
if (!vi) {
ov_clear(&plr_vf);
return 0;
}
plr_fmt.wFormatTag = WAVE_FORMAT_PCM;
plr_fmt.nChannels = vi->channels;
plr_fmt.nSamplesPerSec = vi->rate;
plr_fmt.wBitsPerSample = 16;
plr_fmt.nBlockAlign = plr_fmt.nChannels * (plr_fmt.wBitsPerSample / 8);
plr_fmt.nAvgBytesPerSec = plr_fmt.nBlockAlign * plr_fmt.nSamplesPerSec;
plr_ev = CreateEvent(NULL, 0, 1, NULL);
if (waveOutOpen(&plr_hw, WAVE_MAPPER, &plr_fmt, (DWORD_PTR)plr_ev, 0, CALLBACK_EVENT) != MMSYSERR_NOERROR) {
ov_clear(&plr_vf);
CloseHandle(plr_ev);
plr_ev = NULL;
plr_hw = NULL;
return 0;
}
plr_que = 0;
for (int i = 0; i < WAV_BUF_CNT; i++) {
plr_sta[i] = 0;
plr_hdr[i].dwFlags = WHDR_DONE;
}
if (from == -1) plr_len = 0;
else {
if (from) ov_time_seek(&plr_vf, from * 0.001);
plr_len = to != -1 ? (unsigned int)ceil((to - from) * 0.001 * vi->rate) * 2 * vi->channels : -1; // heed alignment
}
plr_run = true;
return 1;
}
void plr_stop()
{
if (!plr_run) return;
plr_run = false;
if (plr_ev) {
SetEvent(plr_ev);
while (plr_bsy) {
Sleep(1);
}
}
}
void plr_pause()
{
if (plr_hw) waveOutPause(plr_hw);
}
void plr_resume()
{
if (plr_hw) waveOutRestart(plr_hw);
}
int plr_pump()
{
if (!plr_run || !plr_vf.datasource) return -1;
plr_bsy = true;
if (WaitForSingleObject(plr_ev, INFINITE) != 0 || !plr_run) {
plr_bsy = false;
return -1;
}
for (int n = 0, i = plr_que; n < WAV_BUF_CNT; n++, i = (i+1) % WAV_BUF_CNT) {
if (plr_sta[i] != 0) {
continue;
}
WAVEHDR *hdr = &plr_hdr[i];
if (!(hdr->dwFlags & WHDR_DONE)) {
break;
}
char *buf = plr_buf[i];
unsigned int pos = 0, size = plr_len > WAV_BUF_LEN ? WAV_BUF_LEN : plr_len;
while (pos < size) {
long bytes = ov_read(&plr_vf, buf + pos, size - pos, 0, 2, 1, NULL);
if (bytes == OV_HOLE) {
continue;
} else if (bytes == OV_EBADLINK || bytes == OV_EINVAL) {
pos = 0;
break;
} else if (bytes == 0) {
break;
}
pos += bytes;
}
if (pos == 0) {
plr_run = false;
plr_bsy = false;
return 0;
}
plr_len -= pos;
/* volume control, kinda nasty */
if (plr_vol[0] != 1.0 || plr_vol[1] != 1.0) {
short *sbuf = (short *)buf;
for (int j = 0, end = pos / 2; j < end; j+=2) {
// Surprisingly speedwise (fast > slow): float multiplication > float divison >> int multiplication > int division.
// Also remove branching for better compiler SIMD/loop unrolling optimization.
//if (plr_vol[0] != 1.0) sbuf[j] *= plr_vol[0];
//if (plr_vol[1] != 1.0) sbuf[j+1] *= plr_vol[1];
sbuf[j] *= plr_vol[0];
sbuf[j+1] *= plr_vol[1];
}
}
waveOutUnprepareHeader(plr_hw, hdr, sizeof(WAVEHDR));
hdr->lpData = buf;
hdr->dwBufferLength = pos;
hdr->dwUser = 0xCDDA7777; /* our lucky identifier */
hdr->dwFlags = 0;
hdr->dwLoops = 0;
plr_sta[i] = 1;
}
for (int n = 0; n < WAV_BUF_CNT; n++, plr_que = (plr_que+1) % WAV_BUF_CNT) {
if (plr_sta[plr_que] != 1) {
break;
}
WAVEHDR *hdr = &plr_hdr[plr_que];
if (waveOutPrepareHeader(plr_hw, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR || waveOutWrite(plr_hw, hdr, sizeof(WAVEHDR)) != MMSYSERR_NOERROR) {
SetEvent(plr_ev);
Sleep(1);
break;
}
plr_sta[plr_que] = 0;
}
plr_bsy = false;
return 1;
}
/* Not needed: */
/*
int plr_seek(int sec)
{
int len = (int)ov_time_total(&plr_vf, -1);
if(sec<0) sec=0;
if(sec > len) sec = len;
return ov_time_seek(&plr_vf, (double)sec);
}
int plr_tell()
{
int tpos = (int)ov_time_tell(&plr_vf);
return tpos;
}
*/