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raze-gles/source/audiolib/src/vorbis.cpp

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/*
Copyright (C) 2009 Jonathon Fowler <jf@jonof.id.au>
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**
* OggVorbis source support for MultiVoc
*/
#include "compat.h"
#include "pragmas.h"
#ifdef HAVE_VORBIS
#include "pitch.h"
#include "multivoc.h"
#include "_multivc.h"
#define OV_EXCLUDE_STATIC_CALLBACKS
#if defined __APPLE__
# include <vorbis/vorbisfile.h>
#elif defined GEKKO
# define USING_TREMOR
# include <tremor/ivorbisfile.h>
#else
# include "vorbis/vorbisfile.h"
#endif
#define BLOCKSIZE MV_MIXBUFFERSIZE
typedef struct {
void * ptr;
size_t length;
size_t pos;
OggVorbis_File vf;
char block[BLOCKSIZE];
int lastbitstream;
} vorbis_data;
// designed with multiple calls in mind
static void MV_GetVorbisCommentLoops(VoiceNode *voice, vorbis_comment *vc)
{
const char *vc_loopstart = nullptr;
const char *vc_loopend = nullptr;
const char *vc_looplength = nullptr;
for (int comment = 0; comment < vc->comments; ++comment)
{
auto entry = (const char *)vc->user_comments[comment];
if (entry != nullptr && entry[0] != '\0')
{
const char *value = Bstrchr(entry, '=');
if (!value)
continue;
const size_t field = value - entry;
value += 1;
for (int t = 0; t < loopStartTagCount && vc_loopstart == nullptr; ++t)
{
auto tag = loopStartTags[t];
if (field == Bstrlen(tag) && Bstrncasecmp(entry, tag, field) == 0)
vc_loopstart = value;
}
for (int t = 0; t < loopEndTagCount && vc_loopend == nullptr; ++t)
{
auto tag = loopEndTags[t];
if (field == Bstrlen(tag) && Bstrncasecmp(entry, tag, field) == 0)
vc_loopend = value;
}
for (int t = 0; t < loopLengthTagCount && vc_looplength == nullptr; ++t)
{
auto tag = loopLengthTags[t];
if (field == Bstrlen(tag) && Bstrncasecmp(entry, tag, field) == 0)
vc_looplength = value;
}
}
}
if (vc_loopstart != nullptr)
{
const ogg_int64_t ov_loopstart = Batol(vc_loopstart);
if (ov_loopstart >= 0) // a loop starting at 0 is valid
{
voice->LoopStart = (const char *) (intptr_t) ov_loopstart;
voice->LoopSize = 1;
}
}
if (vc_loopend != nullptr)
{
if (voice->LoopSize > 0)
{
const ogg_int64_t ov_loopend = Batol(vc_loopend);
if (ov_loopend > 0) // a loop ending at 0 is invalid
voice->LoopEnd = (const char *) (intptr_t) ov_loopend;
}
}
if (vc_looplength != nullptr)
{
if (voice->LoopSize > 0 && voice->LoopEnd == 0)
{
const ogg_int64_t ov_looplength = Batol(vc_looplength);
if (ov_looplength > 0) // a loop of length 0 is invalid
voice->LoopEnd = (const char *) ((intptr_t) ov_looplength + (intptr_t) voice->LoopStart);
}
}
}
// callbacks
static size_t read_vorbis(void *ptr, size_t size, size_t nmemb, void *datasource)
{
auto vorb = (vorbis_data *)datasource;
errno = 0;
if (vorb->length == vorb->pos)
return 0;
int nread = 0;
for (; nmemb > 0; nmemb--, nread++)
{
int bytes = vorb->length - vorb->pos;
if ((signed)size < bytes)
bytes = (int)size;
memcpy(ptr, (uint8_t *)vorb->ptr + vorb->pos, bytes);
vorb->pos += bytes;
ptr = (uint8_t *)ptr + bytes;
if (vorb->length == vorb->pos)
{
nread++;
break;
}
}
return nread;
}
static int seek_vorbis(void *datasource, ogg_int64_t offset, int whence)
{
auto vorb = (vorbis_data *)datasource;
switch (whence)
{
case SEEK_SET: vorb->pos = 0; break;
case SEEK_CUR: break;
case SEEK_END: vorb->pos = vorb->length; break;
}
vorb->pos += offset;
if (vorb->pos > vorb->length)
vorb->pos = vorb->length;
return vorb->pos;
}
static int close_vorbis(void *datasource)
{
UNREFERENCED_PARAMETER(datasource);
return 0;
}
static long tell_vorbis(void *datasource)
{
auto vorb = (vorbis_data *)datasource;
return vorb->pos;
}
static ov_callbacks vorbis_callbacks = { read_vorbis, seek_vorbis, close_vorbis, tell_vorbis };
int MV_GetVorbisPosition(VoiceNode *voice)
{
auto vd = (vorbis_data *) voice->rawdataptr;
return ov_pcm_tell(&vd->vf);
}
void MV_SetVorbisPosition(VoiceNode *voice, int position)
{
auto vd = (vorbis_data *) voice->rawdataptr;
ov_pcm_seek(&vd->vf, position);
}
/*---------------------------------------------------------------------
Function: MV_GetNextVorbisBlock
Controls playback of OggVorbis data
---------------------------------------------------------------------*/
static playbackstatus MV_GetNextVorbisBlock(VoiceNode *voice)
{
int bitstream;
int bytesread = 0;
auto vd = (vorbis_data *)voice->rawdataptr;
do
{
#ifdef USING_TREMOR
int bytes = ov_read(&vd->vf, vd->block + bytesread, BLOCKSIZE - bytesread, &bitstream);
#else
int bytes = ov_read(&vd->vf, vd->block + bytesread, BLOCKSIZE - bytesread, 0, 2, 1, &bitstream);
#endif
// fprintf(stderr, "ov_read = %d\n", bytes);
if (bytes > 0)
{
ogg_int64_t currentPosition;
bytesread += bytes;
if ((ogg_int64_t)(intptr_t)voice->LoopEnd > 0 &&
(currentPosition = ov_pcm_tell(&vd->vf)) >= (ogg_int64_t)(intptr_t)voice->LoopEnd)
{
bytesread -=
(currentPosition - (ogg_int64_t)(intptr_t)voice->LoopEnd) * voice->channels * 2; // (voice->bits>>3)
int const err = ov_pcm_seek(&vd->vf, (ogg_int64_t)(intptr_t)voice->LoopStart);
if (err != 0)
{
MV_Printf("MV_GetNextVorbisBlock ov_pcm_seek: LOOP_START %l, LOOP_END %l, err %d\n",
(ogg_int64_t)(intptr_t)voice->LoopStart, (ogg_int64_t)(intptr_t)voice->LoopEnd, err);
}
}
continue;
}
else if (bytes == OV_HOLE)
continue;
else if (bytes == 0)
{
if (voice->LoopSize > 0)
{
int const err = ov_pcm_seek(&vd->vf, (ogg_int64_t)(intptr_t)voice->LoopStart);
if (err != 0)
{
MV_Printf("MV_GetNextVorbisBlock ov_pcm_seek: LOOP_START %l, err %d\n",
(ogg_int64_t)(intptr_t)voice->LoopStart, err);
}
else
continue;
}
else
{
break;
}
}
else if (bytes < 0)
{
MV_Printf("MV_GetNextVorbisBlock ov_read: err %d\n", bytes);
return NoMoreData;
}
} while (bytesread < BLOCKSIZE);
if (bytesread == 0)
return NoMoreData;
if (bitstream != vd->lastbitstream)
{
vorbis_info *vi = ov_info(&vd->vf, -1);
if (!vi || (vi->channels != 1 && vi->channels != 2))
return NoMoreData;
voice->channels = vi->channels;
voice->SamplingRate = vi->rate;
voice->RateScale = divideu32(voice->SamplingRate * voice->PitchScale, MV_MixRate);
voice->FixedPointBufferSize = (voice->RateScale * MV_MIXBUFFERSIZE) - voice->RateScale;
vd->lastbitstream = bitstream;
MV_SetVoiceMixMode(voice);
}
uint32_t const samples = divideu32(bytesread, ((voice->bits>>3) * voice->channels));
voice->position = 0;
voice->sound = vd->block;
voice->BlockLength = 0;
voice->length = samples << 16;
#ifdef GEKKO
// If libtremor had the three additional ov_read() parameters that libvorbis has,
// this would be better handled using the endianness parameter.
int16_t *data = (int16_t *)(vd->block); // assumes signed 16-bit
for (bytesread = 0; bytesread < BLOCKSIZE / 2; ++bytesread)
data[bytesread] = (data[bytesread] & 0xff) << 8 | ((data[bytesread] & 0xff00) >> 8);
#endif
return KeepPlaying;
}
/*---------------------------------------------------------------------
Function: MV_PlayVorbis3D
Begin playback of sound data at specified angle and distance
from listener.
---------------------------------------------------------------------*/
int MV_PlayVorbis3D(char *ptr, uint32_t length, int loophow, int pitchoffset, int angle, int distance, int priority, float volume, intptr_t callbackval)
{
if (!MV_Installed)
return MV_SetErrorCode(MV_NotInstalled);
if (distance < 0)
{
distance = -distance;
angle += MV_NUMPANPOSITIONS / 2;
}
int const vol = MIX_VOLUME(distance);
// Ensure angle is within 0 - 127
angle &= MV_MAXPANPOSITION;
return MV_PlayVorbis(ptr, length, loophow, -1, pitchoffset, max(0, 255 - distance),
MV_PanTable[angle][vol].left, MV_PanTable[angle][vol].right, priority, volume, callbackval);
}
/*---------------------------------------------------------------------
Function: MV_PlayVorbis
Begin playback of sound data with the given sound levels and
priority.
---------------------------------------------------------------------*/
int MV_PlayVorbis(char *ptr, uint32_t length, int loopstart, int loopend, int pitchoffset, int vol, int left, int right, int priority, float volume, intptr_t callbackval)
{
UNREFERENCED_PARAMETER(loopend);
if (!MV_Installed)
return MV_SetErrorCode(MV_NotInstalled);
VoiceNode *voice = MV_AllocVoice(priority);
if (voice == nullptr)
return MV_SetErrorCode(MV_NoVoices);
auto vd = (vorbis_data *)Xcalloc(1, sizeof(vorbis_data));
vd->ptr = ptr;
vd->pos = 0;
vd->length = length;
vd->lastbitstream = -1;
int status = ov_open_callbacks((void *)vd, &vd->vf, 0, 0, vorbis_callbacks);
vorbis_info *vi;
if (status < 0 || ((vi = ov_info(&vd->vf, 0)) == nullptr) || vi->channels < 1 || vi->channels > 2)
{
if (status == 0)
ov_clear(&vd->vf);
else
MV_Printf("MV_PlayVorbis: err %d\n", status);
Xfree(vd);
return MV_SetErrorCode(MV_InvalidFile);
}
voice->wavetype = FMT_VORBIS;
voice->bits = 16;
voice->channels = vi->channels;
voice->rawdataptr = (void *)vd;
voice->GetSound = MV_GetNextVorbisBlock;
voice->NextBlock = vd->block;
voice->LoopCount = 0;
voice->BlockLength = 0;
voice->length = 0;
voice->next = nullptr;
voice->prev = nullptr;
voice->priority = priority;
voice->callbackval = callbackval;
voice->LoopStart = nullptr;
voice->LoopEnd = nullptr;
voice->LoopSize = (loopstart >= 0 ? 1 : 0);
// load loop tags from metadata
if (auto comment = ov_comment(&vd->vf, 0))
MV_GetVorbisCommentLoops(voice, comment);
voice->Paused = FALSE;
MV_SetVoicePitch(voice, vi->rate, pitchoffset);
MV_SetVoiceMixMode(voice);
MV_SetVoiceVolume(voice, vol, left, right, volume);
MV_PlayVoice(voice);
return voice->handle;
}
void MV_ReleaseVorbisVoice( VoiceNode * voice )
{
if (voice->wavetype != FMT_VORBIS)
return;
auto vd = (vorbis_data *)voice->rawdataptr;
voice->length = 0;
voice->sound = nullptr;
ov_clear(&vd->vf);
Xfree(vd);
}
#else
#include "_multivc.h"
int MV_PlayVorbis(char *ptr, uint32_t ptrlength, int loopstart, int loopend, int pitchoffset,
int vol, int left, int right, int priority, float volume, intptr_t callbackval)
{
UNREFERENCED_PARAMETER(ptr);
UNREFERENCED_PARAMETER(ptrlength);
UNREFERENCED_PARAMETER(loopstart);
UNREFERENCED_PARAMETER(loopend);
UNREFERENCED_PARAMETER(pitchoffset);
UNREFERENCED_PARAMETER(vol);
UNREFERENCED_PARAMETER(left);
UNREFERENCED_PARAMETER(right);
UNREFERENCED_PARAMETER(priority);
UNREFERENCED_PARAMETER(volume);
UNREFERENCED_PARAMETER(callbackval);
MV_Printf("MV_PlayVorbis: OggVorbis support not included in this binary.\n");
return -1;
}
int MV_PlayVorbis3D(char *ptr, uint32_t ptrlength, int loophow, int pitchoffset, int angle,
int distance, int priority, float volume, intptr_t callbackval)
{
UNREFERENCED_PARAMETER(ptr);
UNREFERENCED_PARAMETER(ptrlength);
UNREFERENCED_PARAMETER(loophow);
UNREFERENCED_PARAMETER(pitchoffset);
UNREFERENCED_PARAMETER(angle);
UNREFERENCED_PARAMETER(distance);
UNREFERENCED_PARAMETER(priority);
UNREFERENCED_PARAMETER(volume);
UNREFERENCED_PARAMETER(callbackval);
MV_Printf("MV_PlayVorbis: OggVorbis support not included in this binary.\n");
return -1;
}
#endif //HAVE_VORBIS
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