experiment: built-in Ogg/Vorbis/FLAC/Opus in Furna

ce
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tildearrow 2025-10-22 16:16:07 -05:00
parent d60ef6b2c3
commit b3ae0ef946
1897 changed files with 1182934 additions and 1 deletions

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# COPYING.Xiph in this distribution). All other programs, libraries, and
# plugins are distributed under the GPL (see COPYING.GPL). The documentation
# is distributed under the Gnu FDL (see COPYING.FDL). Each file in the
# FLAC distribution contains at the top the terms under which it may be
# distributed.
#
# Since this particular file is relevant to all components of FLAC,
# it may be distributed under the Xiph.Org license, which is the least
# restrictive of those mentioned above. See the file COPYING.Xiph in this
# distribution.
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@ -0,0 +1,2 @@
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@ -0,0 +1,32 @@
# example_cpp_encode_file - Simple FLAC file encoder using libFLAC
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CLEANFILES = example_cpp_encode_file.exe

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/* example_cpp_encode_file - Simple FLAC file encoder using libFLAC
* Copyright (C) 2007-2009 Josh Coalson
* Copyright (C) 2011-2025 Xiph.Org Foundation
*
* 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.
*/
/*
* This example shows how to use libFLAC++ to encode a WAVE file to a FLAC
* file. It only supports 16-bit stereo files in canonical WAVE format.
*
* Complete API documentation can be found at:
* http://xiph.org/flac/api/
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "FLAC++/metadata.h"
#include "FLAC++/encoder.h"
#include "share/compat.h"
#include <cstring>
class OurEncoder: public FLAC::Encoder::File {
public:
OurEncoder(): FLAC::Encoder::File() { }
protected:
virtual void progress_callback(FLAC__uint64 bytes_written, FLAC__uint64 samples_written, uint32_t frames_written, uint32_t total_frames_estimate);
};
#define READSIZE 1024
static uint32_t total_samples = 0; /* can use a 32-bit number due to WAVE size limitations */
static FLAC__byte buffer[READSIZE/*samples*/ * 2/*bytes_per_sample*/ * 2/*channels*/]; /* we read the WAVE data into here */
static FLAC__int32 pcm[READSIZE/*samples*/ * 2/*channels*/];
int main(int argc, char *argv[])
{
bool ok = true;
OurEncoder encoder;
FLAC__StreamEncoderInitStatus init_status;
FLAC__StreamMetadata *metadata[2];
FLAC__StreamMetadata_VorbisComment_Entry entry;
FILE *fin;
uint32_t sample_rate = 0;
uint32_t channels = 0;
uint32_t bps = 0;
if(argc != 3) {
fprintf(stderr, "usage: %s infile.wav outfile.flac\n", argv[0]);
return 1;
}
if((fin = fopen(argv[1], "rb")) == NULL) {
fprintf(stderr, "ERROR: opening %s for output\n", argv[1]);
return 1;
}
/* read wav header and validate it */
if(
fread(buffer, 1, 44, fin) != 44 ||
memcmp(buffer, "RIFF", 4) ||
memcmp(buffer+8, "WAVEfmt \020\000\000\000\001\000\002\000", 16) ||
memcmp(buffer+32, "\004\000\020\000data", 8)
) {
fprintf(stderr, "ERROR: invalid/unsupported WAVE file, only 16bps stereo WAVE in canonical form allowed\n");
fclose(fin);
return 1;
}
sample_rate = ((((((uint32_t)buffer[27] << 8) | buffer[26]) << 8) | buffer[25]) << 8) | buffer[24];
channels = 2;
bps = 16;
total_samples = (((((((uint32_t)buffer[43] << 8) | buffer[42]) << 8) | buffer[41]) << 8) | buffer[40]) / 4;
/* check the encoder */
if(!encoder) {
fprintf(stderr, "ERROR: allocating encoder\n");
fclose(fin);
return 1;
}
ok &= encoder.set_verify(true);
ok &= encoder.set_compression_level(5);
ok &= encoder.set_channels(channels);
ok &= encoder.set_bits_per_sample(bps);
ok &= encoder.set_sample_rate(sample_rate);
ok &= encoder.set_total_samples_estimate(total_samples);
/* now add some metadata; we'll add some tags and a padding block */
if(ok) {
if(
(metadata[0] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT)) == NULL ||
(metadata[1] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)) == NULL ||
/* there are many tag (vorbiscomment) functions but these are convenient for this particular use: */
!FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair(&entry, "ARTIST", "Some Artist") ||
!FLAC__metadata_object_vorbiscomment_append_comment(metadata[0], entry, /*copy=*/false) || /* copy=false: let metadata object take control of entry's allocated string */
!FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair(&entry, "YEAR", "1984") ||
!FLAC__metadata_object_vorbiscomment_append_comment(metadata[0], entry, /*copy=*/false)
) {
fprintf(stderr, "ERROR: out of memory or tag error\n");
ok = false;
} else {
metadata[1]->length = 1234; /* set the padding length */
ok = encoder.set_metadata(metadata, 2);
}
}
/* initialize encoder */
if(ok) {
init_status = encoder.init(argv[2]);
if(init_status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) {
fprintf(stderr, "ERROR: initializing encoder: %s\n", FLAC__StreamEncoderInitStatusString[init_status]);
ok = false;
}
}
/* read blocks of samples from WAVE file and feed to encoder */
if(ok) {
size_t left = (size_t)total_samples;
while(ok && left) {
size_t need = (left>READSIZE? (size_t)READSIZE : (size_t)left);
if(fread(buffer, channels*(bps/8), need, fin) != need) {
fprintf(stderr, "ERROR: reading from WAVE file\n");
ok = false;
}
else {
/* convert the packed little-endian 16-bit PCM samples from WAVE into an interleaved FLAC__int32 buffer for libFLAC */
size_t i;
for(i = 0; i < need*channels; i++) {
/* inefficient but simple and works on big- or little-endian machines */
pcm[i] = (FLAC__int32)(((FLAC__int16)(FLAC__int8)buffer[2*i+1] << 8) | (FLAC__int16)buffer[2*i]);
}
/* feed samples to encoder */
ok = encoder.process_interleaved(pcm, need);
}
left -= need;
}
}
ok &= encoder.finish();
fprintf(stderr, "encoding: %s\n", ok? "succeeded" : "FAILED");
fprintf(stderr, " state: %s\n", encoder.get_state().resolved_as_cstring(encoder));
/* now that encoding is finished, the metadata can be freed */
FLAC__metadata_object_delete(metadata[0]);
FLAC__metadata_object_delete(metadata[1]);
fclose(fin);
return 0;
}
void OurEncoder::progress_callback(FLAC__uint64 bytes_written, FLAC__uint64 samples_written, uint32_t frames_written, uint32_t total_frames_estimate)
{
fprintf(stderr, "wrote %" PRIu64 " bytes, %" PRIu64 "/%u samples, %u/%u frames\n", bytes_written, samples_written, total_samples, frames_written, total_frames_estimate);
}