audio/flacenc
Sigrid
parent
10237a22f1
commit
ce82f6750c
|
|
@ -1,6 +1,6 @@
|
|||
.TH AUDIO 1
|
||||
.SH NAME
|
||||
mp3dec, mp3enc, oggdec, oggenc, flacdec, sundec, wavdec, pcmconv, mixfs \- decode and encode audio files
|
||||
mp3dec, mp3enc, oggdec, oggenc, flacdec, flacenc, sundec, wavdec, pcmconv, mixfs \- decode and encode audio files
|
||||
.SH SYNOPSIS
|
||||
.B audio/mp3dec
|
||||
[
|
||||
|
|
@ -55,6 +55,27 @@ q ] [
|
|||
] [
|
||||
.I "long or silly options"
|
||||
]
|
||||
.br
|
||||
.B audio/flacenc
|
||||
[
|
||||
.B -b
|
||||
.I bitspersample
|
||||
] [
|
||||
.B -c
|
||||
.I channels
|
||||
] [
|
||||
.B -l
|
||||
.I compresslevel
|
||||
] [
|
||||
.B -s
|
||||
.I sfreq
|
||||
] [
|
||||
.B -P
|
||||
.I padding
|
||||
] [
|
||||
.B -T
|
||||
.I field=value
|
||||
]
|
||||
.PP
|
||||
.B audio/pcmconv
|
||||
[
|
||||
|
|
@ -107,10 +128,11 @@ seek to a specific position in seconds before decoding.
|
|||
The encoders read PCM on standard input and produce compressed audio
|
||||
on standard output.
|
||||
.PP
|
||||
.I Oggenc
|
||||
.I Flacenc,
|
||||
.I oggenc
|
||||
and
|
||||
.I mp3enc
|
||||
produce OGG Vorbis and MP3 audio. For
|
||||
produce FLAC, OGG Vorbis and MP3 audio. For
|
||||
.I mp3enc,
|
||||
the MP3 file will use `constant bit-rate' (CBR) encoding by default,
|
||||
but that can be changed via
|
||||
|
|
@ -120,11 +142,13 @@ or
|
|||
.BR -v
|
||||
(variable bitrate, VBR).
|
||||
.PP
|
||||
.I Oggenc
|
||||
accepts raw PCM in the same byte order as
|
||||
.I Flacenc
|
||||
and
|
||||
.I oggenc
|
||||
accept raw PCM in the same byte order as
|
||||
.B /dev/audio
|
||||
(little-endian),
|
||||
t
|
||||
while
|
||||
.I mp3enc -r
|
||||
expects big-endian.
|
||||
.SS Encoding options
|
||||
|
|
@ -380,3 +404,5 @@ dd -conv swab | audio/mp3enc -a -r -m m --resample 16 -b 24
|
|||
first appeared in 9front (December, 2012).
|
||||
.I Mixfs
|
||||
first appeared in 9front (December, 2013).
|
||||
.I Flacenc
|
||||
first appeared in 9front (January, 2020).
|
||||
|
|
|
|||
|
|
@ -0,0 +1,148 @@
|
|||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#define _PLAN9_SOURCE
|
||||
#include <utf.h>
|
||||
#include <lib9.h>
|
||||
#include "FLAC/stream_encoder.h"
|
||||
#include "FLAC/metadata.h"
|
||||
|
||||
static FLAC__StreamEncoderReadStatus
|
||||
encwrite(FLAC__StreamEncoder *enc, FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data)
|
||||
{
|
||||
return fwrite(buffer, 1, bytes, stdout) != bytes ?
|
||||
FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR :
|
||||
FLAC__STREAM_ENCODER_WRITE_STATUS_OK;
|
||||
}
|
||||
|
||||
static FLAC__StreamEncoderSeekStatus
|
||||
encseek(FLAC__StreamEncoder *enc, FLAC__uint64 absolute_byte_offset, void *client_data)
|
||||
{
|
||||
return fseeko(stdout, absolute_byte_offset, SEEK_SET) != absolute_byte_offset ?
|
||||
FLAC__STREAM_ENCODER_SEEK_STATUS_UNSUPPORTED :
|
||||
FLAC__STREAM_ENCODER_SEEK_STATUS_OK;
|
||||
}
|
||||
|
||||
static FLAC__StreamEncoderTellStatus
|
||||
enctell(FLAC__StreamEncoder *enc, FLAC__uint64 *absolute_byte_offset, void *client_data)
|
||||
{
|
||||
off_t off;
|
||||
|
||||
if((off = ftello(stdout)) < 0)
|
||||
return FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED;
|
||||
|
||||
*absolute_byte_offset = off;
|
||||
return FLAC__STREAM_ENCODER_TELL_STATUS_OK;
|
||||
}
|
||||
|
||||
static void
|
||||
usage(void)
|
||||
{
|
||||
fprintf(stderr, "usage: %s [-b bitspersample] [-c channels] [-l compresslevel] [-r sfreq] [-P padding] [-T field=value]\n", argv0);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
int i, n, nm, r, be, bits, chan, level, sfreq;
|
||||
FLAC__StreamMetadata_VorbisComment_Entry vc;
|
||||
FLAC__StreamMetadata *m[2];
|
||||
uint32_t beef = 0xdeadbeef;
|
||||
FLAC__StreamEncoder *enc;
|
||||
FLAC__int32 *buf;
|
||||
int16_t *x;
|
||||
|
||||
be = *((uint8_t*)&beef) == 0xde;
|
||||
m[0] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT);
|
||||
nm = 1;
|
||||
|
||||
bits = 16;
|
||||
chan = 2;
|
||||
sfreq = 44100;
|
||||
level = -1;
|
||||
ARGBEGIN{
|
||||
case 'b':
|
||||
bits = atoi(EARGF(usage()));
|
||||
if(bits <= 8 || bits > 32){
|
||||
fprintf(stderr, "bits per sample = %d not supported\n");
|
||||
exit(1);
|
||||
}
|
||||
break;
|
||||
case 'c':
|
||||
chan = atoi(EARGF(usage()));
|
||||
break;
|
||||
case 'l':
|
||||
level = atoi(EARGF(usage()));
|
||||
break;
|
||||
case 's':
|
||||
sfreq = atoi(EARGF(usage()));
|
||||
break;
|
||||
case 'P':
|
||||
m[nm] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
|
||||
m[nm++]->length = atoi(EARGF(usage()));
|
||||
break;
|
||||
case 'T':
|
||||
vc.entry = (FLAC__byte*)EARGF(usage());
|
||||
vc.length = strlen((char*)vc.entry);
|
||||
FLAC__metadata_object_vorbiscomment_append_comment(m[0], vc, true);
|
||||
break;
|
||||
default:
|
||||
usage();
|
||||
}ARGEND
|
||||
|
||||
if(argc != 0)
|
||||
usage();
|
||||
|
||||
n = chan * 4096;
|
||||
if((buf = malloc(n*4)) == NULL){
|
||||
fprintf(stderr, "no memory\n");
|
||||
exit(1);
|
||||
}
|
||||
x = (int16_t*)buf + (bits > 16 ? 0 : n);
|
||||
|
||||
if((enc = FLAC__stream_encoder_new()) == NULL){
|
||||
fprintf(stderr, "failed to create encoder\n");
|
||||
exit(1);
|
||||
}
|
||||
FLAC__stream_encoder_set_bits_per_sample(enc, bits);
|
||||
FLAC__stream_encoder_set_channels(enc, chan);
|
||||
FLAC__stream_encoder_set_sample_rate(enc, sfreq);
|
||||
if(level >= 0)
|
||||
FLAC__stream_encoder_set_compression_level(enc, level);
|
||||
if(!FLAC__stream_encoder_set_metadata(enc, m, nm)){
|
||||
fprintf(stderr, "failed to set metadata\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if(FLAC__stream_encoder_init_stream(enc, encwrite, encseek, enctell, NULL, NULL) != FLAC__STREAM_ENCODER_INIT_STATUS_OK){
|
||||
fprintf(stderr, "failed to init the stream\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
for(;;){
|
||||
r = fread(x, bits > 16 ? 4 : 2, n, stdin);
|
||||
if(r < 1)
|
||||
break;
|
||||
|
||||
if(bits <= 16){
|
||||
for(i = 0; i < r; i++)
|
||||
buf[i] = be ? x[i]<<8 | x[i]>>8 : x[i];
|
||||
}else if(be){
|
||||
for(i = 0; i < r; i++)
|
||||
buf[i] = buf[i]<<24 | (buf[i]<<8)&0xff0000 | (buf[i]>>8)&0xff00 | buf[i]>>24;
|
||||
}
|
||||
|
||||
if(!FLAC__stream_encoder_process_interleaved(enc, buf, r/chan)){
|
||||
fprintf(stderr, "encoding failed\n");
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
if(!FLAC__stream_encoder_finish(enc)){
|
||||
fprintf(stderr, "encoding failed\n");
|
||||
exit(1);
|
||||
}
|
||||
FLAC__stream_encoder_delete(enc);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,21 @@
|
|||
</$objtype/mkfile
|
||||
<../config
|
||||
|
||||
TARGET=flacenc
|
||||
|
||||
CC=pcc
|
||||
CFLAGS=-I. -I../libFLAC -I../libFLAC/FLAC -D_POSIX_SOURCE -D_BSD_EXTENSION -DPlan9 -c
|
||||
|
||||
%.$O: %.c
|
||||
$CC $CFLAGS -c $stem.c
|
||||
|
||||
$O.%: %.$O ../libFLAC/libFLAC.a$O
|
||||
$CC -o $target $prereq
|
||||
|
||||
all:V: $O.$TARGET
|
||||
|
||||
clean:V:
|
||||
rm -f *.[$OS] [$OS].$TARGET
|
||||
|
||||
install:V: $O.$TARGET
|
||||
cp $O.$TARGET $BIN/$TARGET
|
||||
|
|
@ -1,7 +1,7 @@
|
|||
</$objtype/mkfile
|
||||
|
||||
LIBS=libogg libvorbis libFLAC
|
||||
PROGS=pcmconv oggdec oggenc mp3dec mp3enc flacdec wavdec sundec mixfs
|
||||
PROGS=pcmconv oggdec oggenc mp3dec mp3enc flacdec flacenc wavdec sundec mixfs
|
||||
#libs must be made first
|
||||
DIRS=$LIBS $PROGS
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue