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macemu/BasiliskII/src/Unix/bincue_unix.cpp

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/*
* Copyright (C) 2002-2010 The DOSBox Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* Geoffrey Brown 2010
* Includes ideas from dosbox src/dos/cdrom_image.cpp
*
* Limitations: 1) cue files must reference single bin file
* 2) only supports raw mode1 data and audio
* 3) no support for audio flags
* 4) requires SDL audio or OS X core audio
* 5) limited cue file keyword support
*
* Creating cue/bin files:
* cdrdao read-cd --read-raw --paranoia 3 foo.toc
* toc2cue foo.toc
*/
#include "sysdeps.h"
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <libgen.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <errno.h>
#ifdef OSX_CORE_AUDIO
#include "../MacOSX/MacOSX_sound_if.h"
static int bincue_core_audio_callback(void);
#endif
#ifdef USE_SDL_AUDIO
#include <SDL.h>
#include <SDL_audio.h>
#endif
#include "bincue_unix.h"
#define DEBUG 0
#include "debug.h"
#define MAXTRACK 100
#define MAXLINE 512
#define CD_FRAMES 75
//#define RAW_SECTOR_SIZE 2352
//#define COOKED_SECTOR_SIZE 2048
// Bits of Track Control Field -- These are standard for scsi cd players
#define PREMPHASIS 0x1
#define COPY 0x2
#define DATA 0x4
#define AUDIO 0
#define FOURTRACK 0x8
// Audio status -- These are standard for scsi cd players
#define CDROM_AUDIO_INVALID 0x00
#define CDROM_AUDIO_PLAY 0x11
#define CDROM_AUDIO_PAUSED 0x12
#define CDROM_AUDIO_COMPLETED 0x13
#define CDROM_AUDIO_ERROR 0x14
#define CDROM_AUDIO_NO_STATUS 0x15
typedef unsigned char uint8;
// cuefiles can be challenging as some information is
// implied. For example, there may a pregap (also postgap)
// of silence that must be generated. Here we implement
// only the pregap.
typedef struct {
int number;
unsigned int start; // Track start in frames
unsigned int length; // Track length in frames
loff_t fileoffset; // Track frame start within file
unsigned int pregap; // Silence in frames to generate
unsigned int postgap; // Silence in frames to generate at end
unsigned char tcf; // Track control field
} Track;
typedef struct {
char *binfile; // Binary file name
unsigned int length; // file length in frames
int binfh; // binary file handle
int tcnt; // number of tracks
Track tracks[MAXTRACK]; // Track management
int raw_sector_size; // Raw bytes to read per sector
int cooked_sector_size; // Actual data bytes per sector (depends on Mode)
int header_size; // Number of bytes used in header
} CueSheet;
typedef struct {
CueSheet *cs; // cue sheet to play from
int audiofh; // file handle for audio data
unsigned int audioposition; // current position from audiostart (bytes)
unsigned int audiostart; // start position if playing (frame)
unsigned int audioend; // end position if playing (frames)
unsigned int silence; // pregap (silence) bytes
unsigned char audiostatus; // See defines above for status
uint8 volume_left; // CD player volume (left)
uint8 volume_right; // CD player volume (right)
uint8 volume_mono; // CD player single-channel volume
loff_t fileoffset; // offset from file beginning to audiostart
#ifdef OSX_CORE_AUDIO
OSXsoundOutput soundoutput;
#endif
#ifdef USE_SDL_AUDIO
SDL_AudioStream *stream;
#endif
} CDPlayer;
// Minute,Second,Frame data type
typedef struct {
int m, s, f; // note size matters since we scan for %d !
} MSF;
// Parser State
static unsigned int totalPregap;
static unsigned int prestart;
// Audio System State
static bool audio_enabled = false;
static uint8 silence_byte;
// CD Player state. Note only one player is supported !
static CDPlayer player;
static void FramesToMSF(unsigned int frames, MSF *msf)
{
msf->m = frames/(60 * CD_FRAMES);
frames = frames%(60 * CD_FRAMES);
msf->s = frames/CD_FRAMES;
msf->f = frames%CD_FRAMES;
}
static int MSFToFrames(MSF msf)
{
return (msf.m * 60 * CD_FRAMES) + (msf.s * CD_FRAMES) + msf.f;
}
static int PositionToTrack(CueSheet *cs, unsigned int position)
{
int i;
MSF msf;
FramesToMSF(position, &msf);
for (i = 0; i < cs->tcnt; i++) {
if ((position >= cs->tracks[i].start) &&
(position <= (cs->tracks[i].start + cs->tracks[i].length)))
break;
}
return i;
}
static bool AddTrack(CueSheet *cs)
{
int skip = prestart;
Track *prev;
Track *curr = &(cs->tracks[cs->tcnt]);
prestart = 0;
if (skip > 0) {
if (skip > curr->start) {
D(bug("AddTrack: prestart > start\n"));
return false;
}
}
curr->fileoffset = curr->start * cs->raw_sector_size;
// now we patch up the indicated time
curr->start += totalPregap;
// curr->pregap is supposed to be part of this track, but it
// must be generated as silence
totalPregap += curr->pregap;
if (cs->tcnt == 0) {
if (curr->number != 1) {
D(bug("AddTrack: number != 1\n"));
return false;
}
cs->tcnt++;
return true;
}
prev = &(cs->tracks[cs->tcnt - 1]);
if (prev->start < skip)
prev->length = skip - prev->start - curr->pregap;
else
prev->length = curr->start - prev->start - curr->pregap;
// error checks
if (curr->number <= 1) {
D(bug("Bad track number %d\n", curr->number));
return false;
}
if ((prev->number + 1 != curr->number) && (curr->number != 0xAA)) {
D(bug("Bad track number %d\n", curr->number));
return false;
}
if (curr->start < prev->start + prev->length) {
D(bug("unexpected start %d\n", curr->start));
return false;
}
cs->tcnt++;
return true;
}
static bool ParseCueSheet(FILE *fh, CueSheet *cs, const char *cuefile)
{
bool seen1st = false;
char line[MAXLINE];
unsigned int i_line=0;
char *keyword;
totalPregap = 0;
prestart = 0;
while (fgets(line, MAXLINE, fh) != NULL) {
Track *curr = &cs->tracks[cs->tcnt];
// check for CUE file
if (!i_line && (strncmp("FILE", line, 4) != 0)) {
return false;
}
i_line++;
// extract keyword
if (NULL != (keyword = strtok(line, " \t\n\t"))) {
if (!strcmp("FILE", keyword)) {
char *filename;
char *filetype;
if (i_line > 1) {
D(bug("More than one FILE token\n"));
goto fail;
}
filename = strtok(NULL, "\"\t\n\r");
filetype = strtok(NULL, " \"\t\n\r");
if (strcmp("BINARY", filetype)) {
D(bug("Not binary file %s", filetype));
goto fail;
}
else {
char *tmp = strdup(cuefile);
char *b = dirname(tmp);
cs->binfile = (char *) malloc(strlen(b) + strlen(filename) + 2);
sprintf(cs->binfile, "%s/%s", b, filename);
free(tmp);
}
} else if (!strcmp("TRACK", keyword)) {
char *field;
int i_track;
if (seen1st) {
if (!AddTrack(cs)){
D(bug("AddTrack failed \n"));
goto fail;
}
curr = &cs->tracks[cs->tcnt];
}
seen1st = true;
// parse track number
field = strtok(NULL, " \t\n\r");
if (1 != sscanf(field, "%d", &i_track)) {
D(bug("Expected track number\n"));
goto fail;
}
curr->number = i_track;
// parse track type
field = strtok(NULL, " \t\n\r");
if (!strcmp("MODE1/2352", field)) { // red-book CD-ROM standard
curr->tcf = DATA;
cs->raw_sector_size = 2352;
cs->cooked_sector_size = 2048;
cs->header_size = 16; // remaining 288 bytes for error detection
} else if (!strcmp("MODE2/2352", field)) { // yellow-book CD-ROM standard
curr->tcf = DATA;
cs->raw_sector_size = 2352;
cs->cooked_sector_size = 2336; // no error bytes at end
cs->header_size = 16;
} else if (!strcmp("MODE1/2048", field)) { // pure data CD-ROM
curr->tcf = DATA;
cs->raw_sector_size = 2048;
cs->cooked_sector_size = 2048;
cs->header_size = 0; // no header or error bytes
} else if (!strcmp("AUDIO", field)) {
curr->tcf = AUDIO;
} else {
D(bug("Unexpected track type %s", field));
goto fail;
}
} else if (!strcmp("INDEX", keyword)) {
char *field;
int i_index;
MSF msf;
// parse INDEX number
field = strtok(NULL, " \t\n\r");
if (1 != sscanf(field, "%d", &i_index)) {
D(bug("Expected index number"));
goto fail;
}
// parse INDEX start
field = strtok(NULL, " \t\n\r");
if (3 != sscanf(field, "%d:%d:%d",
&msf.m, &msf.s, &msf.f)) {
D(bug("Expected index start frame\n"));
goto fail;
}
if (i_index == 1)
curr->start = MSFToFrames(msf);
else if (i_index == 0)
prestart = MSFToFrames(msf);
} else if (!strcmp("PREGAP", keyword)) {
MSF msf;
char *field = strtok(NULL, " \t\n\r");
if (3 != sscanf(field, "%d:%d:%d",
&msf.m, &msf.s, &msf.f)) {
D(bug("Expected pregap frame\n"));
goto fail;
}
curr->pregap = MSFToFrames(msf);
} else if (!strcmp("POSTGAP", keyword)) {
MSF msf;
char *field = strtok(NULL, " \t\n\r");
if (3 != sscanf(field, "%d:%d:%d",
&msf.m, &msf.s, &msf.f)) {
D(bug("Expected postgap frame\n"));
goto fail;
}
curr->postgap = MSFToFrames(msf);
// Ignored directives
} else if (!strcmp("TITLE", keyword)) {
} else if (!strcmp("PERFORMER", keyword)) {
} else if (!strcmp("REM", keyword)) {
} else if (!strcmp("ISRC", keyword)) {
} else if (!strcmp("SONGWRITER", keyword)) {
} else {
D(bug("Unexpected keyword %s\n", keyword));
goto fail;
}
}
}
AddTrack(cs); // add final track
return true;
fail:
return false;
}
static bool LoadCueSheet(const char *cuefile, CueSheet *cs)
{
FILE *fh = NULL;
int binfh = -1;
struct stat buf;
Track *tlast = NULL;
if (cs) {
bzero(cs, sizeof(*cs));
if (!(fh = fopen(cuefile, "r")))
return false;
if (!ParseCueSheet(fh, cs, cuefile)) goto fail;
// Open bin file and find length
if ((binfh = open(cs->binfile,O_RDONLY)) < 0) {
D(bug("Can't read bin file %s\n", cs->binfile));
goto fail;
}
if (fstat(binfh, &buf)) {
D(bug("fstat returned error\n"));
goto fail;
}
// compute length of final track
tlast = &cs->tracks[cs->tcnt - 1];
tlast->length = buf.st_size/cs->raw_sector_size
- tlast->start + totalPregap;
if (tlast->length < 0) {
D(bug("Binary file too short \n"));
goto fail;
}
// save bin file length and pointer
cs->length = buf.st_size/cs->raw_sector_size;
cs->binfh = binfh;
fclose(fh);
return true;
fail:
if (binfh >= 0)
close(binfh);
fclose(fh);
free(cs->binfile);
return false;
}
return false;
}
void *open_bincue(const char *name)
{
CueSheet *cs;
if (player.cs == NULL) {
cs = (CueSheet *) malloc(sizeof(CueSheet));
if (!cs) {
D(bug("malloc failed\n"));
return NULL;
}
if (LoadCueSheet(name, cs)) {
player.cs = cs;
player.volume_left = 0;
player.volume_right = 0;
player.volume_mono = 0;
#ifdef OSX_CORE_AUDIO
audio_enabled = true;
#endif
if (audio_enabled)
player.audiostatus = CDROM_AUDIO_NO_STATUS;
else
player.audiostatus = CDROM_AUDIO_INVALID;
player.audiofh = dup(cs->binfh);
return cs;
}
else
free(cs);
}
return NULL;
}
void close_bincue(void *fh)
{
}
/*
* File read (cooked)
* Data are stored in raw sectors of which only COOKED_SECTOR_SIZE
* bytes are valid -- the remaining include header bytes at the beginning
* of each raw sector and RAW_SECTOR_SIZE - COOKED_SECTOR_SIZE - bytes
* at the end for error correction
*
* The actual number of bytes used for header, raw, cooked, error depend
* on mode specified in the cuesheet
*
* We assume that a read request can land in the middle of
* sector. We compute the byte address of that sector (sec)
* and the offset of the first byte we want within that sector (secoff)
*
* Reading is performed one raw sector at a time, extracting as many
* valid bytes as possible from that raw sector (available)
*/
size_t read_bincue(void *fh, void *b, loff_t offset, size_t len)
{
CueSheet *cs = (CueSheet *) fh;
size_t bytes_read = 0; // bytes read so far
unsigned char *buf = (unsigned char *) b; // target buffer
unsigned char secbuf[cs->raw_sector_size]; // temporary buffer
off_t sec = ((offset/cs->cooked_sector_size) * cs->raw_sector_size);
off_t secoff = offset % cs->cooked_sector_size;
// sec contains location (in bytes) of next raw sector to read
// secoff contains offset within that sector at which to start
// reading since we can request a read that starts in the middle
// of a sector
if (cs == NULL || lseek(cs->binfh, sec, SEEK_SET) < 0) {
return -1;
}
while (len) {
// bytes available in next raw sector or len (bytes)
// we want whichever is less
size_t available = cs->cooked_sector_size - secoff;
available = (available > len) ? len : available;
// read the next raw sector
if (read(cs->binfh, secbuf, cs->raw_sector_size) != cs->raw_sector_size) {
return bytes_read;
}
// copy cooked sector bytes (skip header if needed, typically 16 bytes)
// we want out of those available
bcopy(&secbuf[cs->header_size+secoff], &buf[bytes_read], available);
// next sector we start at the beginning
secoff = 0;
// increment running count decrement request
bytes_read += available;
len -= available;
}
return bytes_read;
}
loff_t size_bincue(void *fh)
{
if (fh) {
return ((CueSheet *)fh)->length * ((CueSheet *)fh)->cooked_sector_size;
}
return 0;
}
bool readtoc_bincue(void *fh, unsigned char *toc)
{
CueSheet *cs = (CueSheet *) fh;
if (cs) {
MSF msf;
unsigned char *p = toc + 2;
*p++ = cs->tracks[0].number;
*p++ = cs->tracks[cs->tcnt - 1].number;
for (int i = 0; i < cs->tcnt; i++) {
FramesToMSF(cs->tracks[i].start, &msf);
*p++ = 0;
*p++ = 0x10 | cs->tracks[i].tcf;
*p++ = cs->tracks[i].number;
*p++ = 0;
*p++ = 0;
*p++ = msf.m;
*p++ = msf.s;
*p++ = msf.f;
}
FramesToMSF(cs->length, &msf);
*p++ = 0;
*p++ = 0x14;
*p++ = 0xAA;
*p++ = 0;
*p++ = 0;
*p++ = msf.m;
*p++ = msf.s;
*p++ = msf.f;
int toc_size = p - toc;
*toc++ = toc_size >> 8;
*toc++ = toc_size & 0xff;
return true;
}
return false;
}
bool GetPosition_bincue(void *fh, uint8 *pos)
{
CueSheet *cs = (CueSheet *) fh;
if (cs && player.cs == cs) {
MSF abs, rel;
int fpos = player.audioposition / cs->raw_sector_size + player.audiostart;
int trackno = PositionToTrack(cs, fpos);
if (!audio_enabled)
return false;
FramesToMSF(fpos, &abs);
if (trackno < cs->tcnt) {
// compute position relative to start of frame
unsigned int position = player.audioposition/cs->raw_sector_size +
player.audiostart - player.cs->tracks[trackno].start;
FramesToMSF(position, &rel);
}
else
FramesToMSF(0, &rel);
*pos++ = 0;
*pos++ = player.audiostatus;
*pos++ = 0;
*pos++ = 12; // Sub-Q data length
*pos++ = 0;
if (trackno < cs->tcnt)
*pos++ = 0x10 | cs->tracks[trackno].tcf;
*pos++ = (trackno < cs->tcnt) ? cs->tracks[trackno].number : 0xAA;
*pos++ = 1; // track index
*pos++ = 0;
*pos++ = abs.m;
*pos++ = abs.s;
*pos++ = abs.f;
*pos++ = 0;
*pos++ = rel.m;
*pos++ = rel.s;
*pos++ = rel.f;
*pos++ = 0;
// D(bug("CDROM position %02d:%02d:%02d track %02d\n", abs.m, abs.s, abs.f, trackno));
return true;
}
else
return false;
}
bool CDPause_bincue(void *fh)
{
CueSheet *cs = (CueSheet *) fh;
if (cs && cs == player.cs) {
if (player.audiostatus == CDROM_AUDIO_PLAY) {
player.audiostatus = CDROM_AUDIO_PAUSED;
return true;
}
}
return false;
}
bool CDStop_bincue(void *fh)
{
CueSheet *cs = (CueSheet *) fh;
if (cs && cs == player.cs) {
#ifdef OSX_CORE_AUDIO
player.soundoutput.stop();
#endif
if (player.audiostatus != CDROM_AUDIO_INVALID)
player.audiostatus = CDROM_AUDIO_NO_STATUS;
return true;
}
return false;
}
bool CDResume_bincue(void *fh)
{
CueSheet *cs = (CueSheet *) fh;
if (cs && cs == player.cs) {
// if (player.audiostatus == CDROM_AUDIO_PAUSED) {
// don't care if it was paused or not, just ensure it's playing after this call
player.audiostatus = CDROM_AUDIO_PLAY;
return true;
// }
}
return false;
}
bool CDPlay_bincue(void *fh, uint8 start_m, uint8 start_s, uint8 start_f,
uint8 end_m, uint8 end_s, uint8 end_f)
{
CueSheet *cs = (CueSheet *)fh;
if (cs && cs == player.cs) {
int track;
MSF msf;
#ifdef USE_SDL_AUDIO
SDL_LockAudio();
#endif
player.audiostatus = CDROM_AUDIO_NO_STATUS;
player.audiostart = (start_m * 60 * CD_FRAMES) +
(start_s * CD_FRAMES) + start_f;
player.audioend = (end_m * 60 * CD_FRAMES) + (end_s * CD_FRAMES) + end_f;
track = PositionToTrack(player.cs, player.audiostart);
if (track < player.cs->tcnt) {
player.audioposition = 0;
// here we need to compute silence
if (player.audiostart - player.cs->tracks[track].start >
player.cs->tracks[track].pregap)
player.silence = 0;
else
player.silence = (player.cs->tracks[track].pregap -
player.audiostart +
player.cs->tracks[track].start) * cs->raw_sector_size;
player.fileoffset = player.cs->tracks[track].fileoffset;
D(bug("file offset %d\n", (unsigned int) player.fileoffset));
// fix up file offset if beyond the silence bytes
if (!player.silence) // not at the beginning
player.fileoffset += (player.audiostart -
player.cs->tracks[track].start -
player.cs->tracks[track].pregap) * cs->raw_sector_size;
FramesToMSF(player.cs->tracks[track].start, &msf);
D(bug("CDPlay_bincue track %02d start %02d:%02d:%02d silence %d",
player.cs->tracks[track].number, msf.m, msf.s, msf.f,
player.silence/cs->raw_sector_size));
D(bug(" Stop %02u:%02u:%02u\n", end_m, end_s, end_f));
}
else
D(bug("CDPlay_bincue: play beyond last track !\n"));
#ifdef USE_SDL_AUDIO
SDL_UnlockAudio();
#endif
if (audio_enabled) {
player.audiostatus = CDROM_AUDIO_PLAY;
#ifdef OSX_CORE_AUDIO
D(bug("starting os x sound"));
player.soundoutput.setCallback(bincue_core_audio_callback);
// should be from current track !
player.soundoutput.start(16, 2, 44100);
#endif
return true;
}
}
return false;
}
bool CDScan_bincue(void *fh, uint8 start_m, uint8 start_s, uint8 start_f, bool reverse) {
CueSheet *cs = (CueSheet *)fh;
if (cs && cs == player.cs) {
// stub
return true;
}
return false;
}
void CDSetVol_bincue(void* fh, uint8 left, uint8 right) {
CueSheet *cs = (CueSheet *)fh;
if (cs && cs == player.cs) {
// Convert from classic Mac's 0-255 to 0-128;
// calculate mono mix as well in place of panning
player.volume_left = (left*128)/255;
player.volume_right = (right*128)/255;
player.volume_mono = (player.volume_left + player.volume_right)/2; // use avg
}
}
void CDGetVol_bincue(void* fh, uint8* left, uint8* right) {
CueSheet *cs = (CueSheet *)fh;
if (cs && cs == player.cs) {
// Convert from 0-128 to 0-255 scale
*left = (player.volume_left*255)/128;
*right = (player.volume_right*255)/128;
}
}
static uint8 *fill_buffer(int stream_len)
{
static uint8 *buf = 0;
static int bufsize = 0;
int offset = 0;
if (bufsize < stream_len) {
free(buf);
buf = (uint8 *) malloc(stream_len);
if (buf) {
bufsize = stream_len;
}
else {
D(bug("malloc failed \n"));
return NULL;
}
}
memset(buf, silence_byte, stream_len);
if (player.audiostatus == CDROM_AUDIO_PLAY) {
int remaining_silence = player.silence - player.audioposition;
if (player.audiostart + player.audioposition/player.cs->raw_sector_size
>= player.audioend) {
player.audiostatus = CDROM_AUDIO_COMPLETED;
return buf;
}
if (remaining_silence >= stream_len) {
player.audioposition += stream_len;
return buf;
}
if (remaining_silence > 0) {
offset += remaining_silence;
player.audioposition += remaining_silence;
}
int ret = 0;
int available = ((player.audioend - player.audiostart) *
player.cs->raw_sector_size) - player.audioposition;
if (available > (stream_len - offset))
available = stream_len - offset;
if (lseek(player.audiofh,
player.fileoffset + player.audioposition - player.silence,
SEEK_SET) < 0)
return NULL;
if (available < 0) {
player.audioposition += available; // correct end !;
available = 0;
}
if ((ret = read(player.audiofh, &buf[offset], available)) >= 0) {
player.audioposition += ret;
offset += ret;
available -= ret;
}
while (offset < stream_len) {
buf[offset++] = silence_byte;
if (available-- > 0){
player.audioposition++;
}
}
}
return buf;
}
#ifdef USE_SDL_AUDIO
void MixAudio_bincue(uint8 *stream, int stream_len, int volume)
{
// if (audio_enabled && (player.audiostatus == CDROM_AUDIO_PLAY)) {
// uint8 *buf = fill_buffer(stream_len);
// if (buf)
// SDL_MixAudio(stream, buf, stream_len, volume);
// }
if (audio_enabled && (player.audiostatus == CDROM_AUDIO_PLAY)) {
uint8 *buf = fill_buffer(stream_len);
if (buf)
SDL_AudioStreamPut(player.stream, buf, stream_len);
int avail = SDL_AudioStreamAvailable(player.stream);
if (avail >= stream_len) {
uint8 converted[stream_len];
SDL_AudioStreamGet(player.stream, converted, stream_len);
SDL_MixAudio(stream, converted, stream_len, player.volume_mono);
}
}
}
void OpenAudio_bincue(int freq, int format, int channels, uint8 silence, int volume)
{
// audio_enabled = true;
// silence_byte = silence;
// set player volume based on SDL volume
player.volume_left = player.volume_right = player.volume_mono = volume;
// audio stream handles converting cd audio to destination output
player.stream = SDL_NewAudioStream(AUDIO_S16LSB, 2, 44100, format, channels, freq);
if (player.stream == NULL) {
D(bug("Failed to open CD player audio stream using SDL!"));
}
else {
audio_enabled = true;
silence_byte = silence;
}
// audio_enabled = true;
// silence_byte = silence;
// if (freq == 44100 && format == AUDIO_S16MSB && channels == 2) {
// audio_enabled = true;
// silence_byte = silence;
// }
// else {
// D(bug("unexpected frequency %d , format %d, or channels %d\n",
// freq, format, channels));
// }
}
#endif
#ifdef OSX_CORE_AUDIO
static int bincue_core_audio_callback(void)
{
int frames = player.soundoutput.bufferSizeFrames();
uint8 *buf = fill_buffer(frames*4);
// D(bug("Audio request %d\n", stream_len));
player.soundoutput.sendAudioBuffer((void *) buf, (buf ? frames : 0));
return 1;
}
#endif
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