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spingle/source/snd_flac.c

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/*
* fLaC streaming music support, loosely based QuakeForge implementation
* with modifications. requires libFLAC >= 1.0.4 at compile and runtime.
*
* Copyright (C) 2005 Bill Currie <bill@taniwha.org>
* Copyright (C) 2013 O.Sezer <sezero@users.sourceforge.net>
*
* 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
*
*/
#include "q_defs.h"
#if defined(USE_CODEC_FLAC)
#include "snd_codec.h"
#include "snd_codeci.h"
#include "snd_flac.h"
#undef LEGACY_FLAC
#include <FLAC/stream_decoder.h>
/* FLAC 1.1.3 has FLAC_API_VERSION_CURRENT == 8 */
#if !defined(FLAC_API_VERSION_CURRENT) || ((FLAC_API_VERSION_CURRENT+0) < 8)
#define LEGACY_FLAC
#include <FLAC/seekable_stream_decoder.h>
#endif
#if defined(LEGACY_FLAC)
#define FLAC__StreamDecoder FLAC__SeekableStreamDecoder
#define FLAC__StreamDecoderReadStatus FLAC__SeekableStreamDecoderReadStatus
#define FLAC__StreamDecoderSeekStatus FLAC__SeekableStreamDecoderSeekStatus
#define FLAC__StreamDecoderTellStatus FLAC__SeekableStreamDecoderTellStatus
#define FLAC__StreamDecoderLengthStatus FLAC__SeekableStreamDecoderLengthStatus
#define FLAC__stream_decoder_new FLAC__seekable_stream_decoder_new
#define FLAC__stream_decoder_finish FLAC__seekable_stream_decoder_finish
#define FLAC__stream_decoder_delete FLAC__seekable_stream_decoder_delete
#define FLAC__stream_decoder_process_single FLAC__seekable_stream_decoder_process_single
#define FLAC__stream_decoder_seek_absolute FLAC__seekable_stream_decoder_seek_absolute
#define FLAC__stream_decoder_process_until_end_of_metadata FLAC__seekable_stream_decoder_process_until_end_of_metadata
#define FLAC__stream_decoder_get_state FLAC__seekable_stream_decoder_get_state
#define FLAC__STREAM_DECODER_INIT_STATUS_OK FLAC__SEEKABLE_STREAM_DECODER_OK
#define FLAC__STREAM_DECODER_READ_STATUS_CONTINUE FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_OK
#define FLAC__STREAM_DECODER_READ_STATUS_ABORT FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_ERROR
#define FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_OK /* !!! */
#define FLAC__STREAM_DECODER_WRITE_STATUS_ABORT FLAC__STREAM_DECODER_WRITE_STATUS_ABORT
#define FLAC__STREAM_DECODER_SEEK_STATUS_OK FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_OK
#define FLAC__STREAM_DECODER_SEEK_STATUS_ERROR FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_ERROR
#define FLAC__STREAM_DECODER_TELL_STATUS_OK FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK
#define FLAC__STREAM_DECODER_TELL_STATUS_ERROR FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_ERROR
#define FLAC__STREAM_DECODER_LENGTH_STATUS_OK FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_OK
typedef unsigned FLAC_SIZE_T;
#else
typedef size_t FLAC_SIZE_T;
#endif
typedef struct
{
FLAC__StreamDecoder *decoder;
fshandle_t *file;
snd_info_t *info;
byte *buffer;
int32_t size, pos, error;
} flacfile_t;
/* CALLBACK FUNCTIONS: */
static void
flac_error_func(const FLAC__StreamDecoder *decoder,
FLAC__StreamDecoderErrorStatus status, void *client_data)
{
(void)decoder;
flacfile_t *ff = (flacfile_t *) client_data;
ff->error = -1;
Con_Printf("FLAC: decoder error %" PRIi32 "\n", status);
}
static FLAC__StreamDecoderReadStatus
flac_read_func(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[],
FLAC_SIZE_T *bytes, void *client_data)
{
flacfile_t *ff = (flacfile_t *) client_data;
(void)decoder;
if(*bytes > 0)
{
*bytes = FS_fread(buffer, 1, *bytes, ff->file);
if(FS_ferror(ff->file))
return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
if(*bytes == 0)
return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
}
return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
}
static FLAC__StreamDecoderSeekStatus
flac_seek_func(const FLAC__StreamDecoder *decoder,
FLAC__uint64 absolute_byte_offset, void *client_data)
{
flacfile_t *ff = (flacfile_t *) client_data;
(void)decoder;
if(FS_fseek(ff->file, (long)absolute_byte_offset, SEEK_SET) < 0)
return FLAC__STREAM_DECODER_SEEK_STATUS_ERROR;
return FLAC__STREAM_DECODER_SEEK_STATUS_OK;
}
static FLAC__StreamDecoderTellStatus
flac_tell_func(const FLAC__StreamDecoder *decoder,
FLAC__uint64 *absolute_byte_offset, void *client_data)
{
flacfile_t *ff = (flacfile_t *) client_data;
long pos = FS_ftell(ff->file);
(void)decoder;
if(pos < 0) return FLAC__STREAM_DECODER_TELL_STATUS_ERROR;
*absolute_byte_offset = (FLAC__uint64) pos;
return FLAC__STREAM_DECODER_TELL_STATUS_OK;
}
static FLAC__StreamDecoderLengthStatus
flac_length_func(const FLAC__StreamDecoder *decoder,
FLAC__uint64 *stream_length, void *client_data)
{
flacfile_t *ff = (flacfile_t *) client_data;
(void)decoder;
*stream_length = (FLAC__uint64) FS_filelength(ff->file);
return FLAC__STREAM_DECODER_LENGTH_STATUS_OK;
}
static FLAC__bool
flac_eof_func(const FLAC__StreamDecoder *decoder, void *client_data)
{
flacfile_t *ff = (flacfile_t *) client_data;
(void)decoder;
if(FS_feof(ff->file)) return true;
return false;
}
static FLAC__StreamDecoderWriteStatus
flac_write_func(const FLAC__StreamDecoder *decoder,
const FLAC__Frame *frame, const FLAC__int32 * const buffer[],
void *client_data)
{
flacfile_t *ff = (flacfile_t *) client_data;
(void)decoder;
if(!ff->buffer)
{
ff->buffer = (byte *) malloc(ff->info->blocksize * ff->info->channels * ff->info->width);
if(!ff->buffer)
{
ff->error = -1; /* needn't set this here, but... */
Con_Printf("Insufficient memory for fLaC audio\n");
return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
}
}
if(ff->info->channels == 1)
{
unsigned i;
const FLAC__int32 *in = buffer[0];
if(ff->info->bits == 8)
{
byte *out = ff->buffer;
for(i = 0; i < frame->header.blocksize; i++)
*out++ = *in++ + 128;
}
else
{
int16_t *out = (int16_t *) ff->buffer;
for(i = 0; i < frame->header.blocksize; i++)
*out++ = *in++;
}
}
else
{
unsigned i;
const FLAC__int32 *li = buffer[0];
const FLAC__int32 *ri = buffer[1];
if(ff->info->bits == 8)
{
char *lo = (char *) ff->buffer + 0;
char *ro = (char *) ff->buffer + 1;
for(i = 0; i < frame->header.blocksize; i++, lo++, ro++)
{
*lo++ = *li++ + 128;
*ro++ = *ri++ + 128;
}
}
else
{
int16_t *lo = (int16_t *) ff->buffer + 0;
int16_t *ro = (int16_t *) ff->buffer + 1;
for(i = 0; i < frame->header.blocksize; i++, lo++, ro++)
{
*lo++ = *li++;
*ro++ = *ri++;
}
}
}
ff->size = frame->header.blocksize * ff->info->width * ff->info->channels;
ff->pos = 0;
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}
static void
flac_meta_func(const FLAC__StreamDecoder *decoder,
const FLAC__StreamMetadata *metadata, void *client_data)
{
flacfile_t *ff = (flacfile_t *) client_data;
(void)decoder;
if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO)
{
ff->info->rate = metadata->data.stream_info.sample_rate;
ff->info->bits = metadata->data.stream_info.bits_per_sample;
ff->info->width = ff->info->bits / 8;
ff->info->channels = metadata->data.stream_info.channels;
ff->info->blocksize = metadata->data.stream_info.max_blocksize;
ff->info->dataofs = 0; /* got the STREAMINFO metadata */
}
}
static bool S_FLAC_CodecInitialize(void)
{
return true;
}
static void S_FLAC_CodecShutdown(void)
{
}
static bool S_FLAC_CodecOpenStream(snd_stream_t *stream)
{
flacfile_t *ff;
int32_t rc;
ff = (flacfile_t *) Z_Malloc(sizeof(flacfile_t));
ff->decoder = FLAC__stream_decoder_new();
if(ff->decoder == NULL)
{
Con_Printf("Unable to create fLaC decoder\n");
goto _fail;
}
stream->priv = ff;
ff->info = & stream->info;
ff->file = & stream->fh;
ff->info->dataofs = -1; /* check for STREAMINFO metadata existence */
#if defined(LEGACY_FLAC)
FLAC__seekable_stream_decoder_set_error_callback(ff->decoder, flac_error_func);
FLAC__seekable_stream_decoder_set_read_callback(ff->decoder, flac_read_func);
FLAC__seekable_stream_decoder_set_seek_callback(ff->decoder, flac_seek_func);
FLAC__seekable_stream_decoder_set_tell_callback(ff->decoder, flac_tell_func);
FLAC__seekable_stream_decoder_set_length_callback(ff->decoder, flac_length_func);
FLAC__seekable_stream_decoder_set_eof_callback(ff->decoder, flac_eof_func);
FLAC__seekable_stream_decoder_set_write_callback(ff->decoder, flac_write_func);
FLAC__seekable_stream_decoder_set_metadata_callback(ff->decoder, flac_meta_func);
FLAC__seekable_stream_decoder_set_client_data(ff->decoder, ff);
rc = FLAC__seekable_stream_decoder_init(ff->decoder);
#else
rc = FLAC__stream_decoder_init_stream(ff->decoder,
flac_read_func,
flac_seek_func,
flac_tell_func,
flac_length_func,
flac_eof_func,
flac_write_func,
flac_meta_func,
flac_error_func,
ff);
#endif
if(rc != FLAC__STREAM_DECODER_INIT_STATUS_OK) /* unlikely */
{
Con_Printf("FLAC: decoder init error %" PRIi32 "\n", rc);
goto _fail;
}
rc = FLAC__stream_decoder_process_until_end_of_metadata(ff->decoder);
if(rc == false || ff->error)
{
rc = FLAC__stream_decoder_get_state(ff->decoder);
Con_Printf("%s not a valid flac file? (decoder state %" PRIi32 ")\n",
stream->name, rc);
goto _fail;
}
if(ff->info->dataofs < 0)
{
Con_Printf("%s has no STREAMINFO\n", stream->name);
goto _fail;
}
if(ff->info->bits != 8 && ff->info->bits != 16)
{
Con_Printf("%s is not 8 or 16 bit\n", stream->name);
goto _fail;
}
if(ff->info->channels != 1 && ff->info->channels != 2)
{
Con_Printf("Unsupported number of channels %" PRIi32 " in %s\n",
ff->info->channels, stream->name);
goto _fail;
}
return true;
_fail:
if(ff->decoder)
{
FLAC__stream_decoder_finish(ff->decoder);
FLAC__stream_decoder_delete(ff->decoder);
}
Z_Free(ff);
return false;
}
static int32_t S_FLAC_CodecReadStream(snd_stream_t *stream, int32_t len, void *buffer)
{
flacfile_t *ff = (flacfile_t *) stream->priv;
byte *buf = (byte *) buffer;
int32_t count = 0;
while(len)
{
int32_t res = 0;
if(ff->size == ff->pos)
FLAC__stream_decoder_process_single(ff->decoder);
if(ff->error) return -1;
res = ff->size - ff->pos;
if(res > len)
res = len;
if(res > 0)
{
memcpy(buf, ff->buffer + ff->pos, res);
count += res;
len -= res;
buf += res;
ff->pos += res;
}
else if(res < 0) /* error */
{
return -1;
}
else
{
Con_DPrintf("FLAC: EOF\n");
break;
}
}
return count;
}
static void S_FLAC_CodecCloseStream(snd_stream_t *stream)
{
flacfile_t *ff = (flacfile_t *) stream->priv;
FLAC__stream_decoder_finish(ff->decoder);
FLAC__stream_decoder_delete(ff->decoder);
if(ff->buffer)
free(ff->buffer);
Z_Free(ff);
S_CodecUtilClose(&stream);
}
static int32_t S_FLAC_CodecRewindStream(snd_stream_t *stream)
{
flacfile_t *ff = (flacfile_t *) stream->priv;
ff->pos = ff->size = 0;
if(FLAC__stream_decoder_seek_absolute(ff->decoder, 0)) return 0;
return -1;
}
snd_codec_t flac_codec =
{
CODECTYPE_FLAC,
true, /* always available. */
"flac",
S_FLAC_CodecInitialize,
S_FLAC_CodecShutdown,
S_FLAC_CodecOpenStream,
S_FLAC_CodecReadStream,
S_FLAC_CodecRewindStream,
S_FLAC_CodecCloseStream,
NULL
};
#endif /* USE_CODEC_FLAC */
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