192 lines
6.4 KiB
C
Executable file
192 lines
6.4 KiB
C
Executable file
/*
|
|
* Chromaprint fingerprinting muxer
|
|
* Copyright (c) 2015 Rodger Combs
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "libavutil/opt.h"
|
|
#include "libavcodec/internal.h"
|
|
#include <chromaprint.h>
|
|
|
|
#define CPR_VERSION_INT AV_VERSION_INT(CHROMAPRINT_VERSION_MAJOR, \
|
|
CHROMAPRINT_VERSION_MINOR, \
|
|
CHROMAPRINT_VERSION_PATCH)
|
|
|
|
typedef enum FingerprintFormat {
|
|
FINGERPRINT_RAW,
|
|
FINGERPRINT_COMPRESSED,
|
|
FINGERPRINT_BASE64,
|
|
} FingerprintFormat;
|
|
|
|
typedef struct ChromaprintMuxContext {
|
|
const AVClass *class;
|
|
int silence_threshold;
|
|
int algorithm;
|
|
FingerprintFormat fp_format;
|
|
#if CPR_VERSION_INT >= AV_VERSION_INT(1, 4, 0)
|
|
ChromaprintContext *ctx;
|
|
#else
|
|
ChromaprintContext ctx;
|
|
#endif
|
|
} ChromaprintMuxContext;
|
|
|
|
static void cleanup(ChromaprintMuxContext *cpr)
|
|
{
|
|
if (cpr->ctx) {
|
|
ff_lock_avformat();
|
|
chromaprint_free(cpr->ctx);
|
|
ff_unlock_avformat();
|
|
}
|
|
}
|
|
|
|
static int write_header(AVFormatContext *s)
|
|
{
|
|
ChromaprintMuxContext *cpr = s->priv_data;
|
|
AVStream *st;
|
|
|
|
ff_lock_avformat();
|
|
cpr->ctx = chromaprint_new(cpr->algorithm);
|
|
ff_unlock_avformat();
|
|
|
|
if (!cpr->ctx) {
|
|
av_log(s, AV_LOG_ERROR, "Failed to create chromaprint context.\n");
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
if (cpr->silence_threshold != -1) {
|
|
#if CPR_VERSION_INT >= AV_VERSION_INT(0, 7, 0)
|
|
if (!chromaprint_set_option(cpr->ctx, "silence_threshold", cpr->silence_threshold)) {
|
|
av_log(s, AV_LOG_ERROR, "Failed to set silence threshold. Setting silence_threshold requires -algorithm 3 option.\n");
|
|
goto fail;
|
|
}
|
|
#else
|
|
av_log(s, AV_LOG_ERROR, "Setting the silence threshold requires Chromaprint "
|
|
"version 0.7.0 or later.\n");
|
|
goto fail;
|
|
#endif
|
|
}
|
|
|
|
if (s->nb_streams != 1) {
|
|
av_log(s, AV_LOG_ERROR, "Only one stream is supported\n");
|
|
goto fail;
|
|
}
|
|
|
|
st = s->streams[0];
|
|
|
|
if (st->codecpar->channels > 2) {
|
|
av_log(s, AV_LOG_ERROR, "Only up to 2 channels are supported\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (st->codecpar->sample_rate < 1000) {
|
|
av_log(s, AV_LOG_ERROR, "Sampling rate must be at least 1000\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (!chromaprint_start(cpr->ctx, st->codecpar->sample_rate, st->codecpar->channels)) {
|
|
av_log(s, AV_LOG_ERROR, "Failed to start chromaprint\n");
|
|
goto fail;
|
|
}
|
|
|
|
return 0;
|
|
fail:
|
|
cleanup(cpr);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
static int write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
ChromaprintMuxContext *cpr = s->priv_data;
|
|
return chromaprint_feed(cpr->ctx, (const int16_t *)pkt->data, pkt->size / 2) ? 0 : AVERROR(EINVAL);
|
|
}
|
|
|
|
static int write_trailer(AVFormatContext *s)
|
|
{
|
|
ChromaprintMuxContext *cpr = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
void *fp = NULL;
|
|
char *enc_fp = NULL;
|
|
int size, enc_size, ret = AVERROR(EINVAL);
|
|
|
|
if (!chromaprint_finish(cpr->ctx)) {
|
|
av_log(s, AV_LOG_ERROR, "Failed to generate fingerprint\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (!chromaprint_get_raw_fingerprint(cpr->ctx, (uint32_t **)&fp, &size)) {
|
|
av_log(s, AV_LOG_ERROR, "Failed to retrieve fingerprint\n");
|
|
goto fail;
|
|
}
|
|
|
|
switch (cpr->fp_format) {
|
|
case FINGERPRINT_RAW:
|
|
avio_write(pb, fp, size * 4); //fp points to array of uint32_t
|
|
break;
|
|
case FINGERPRINT_COMPRESSED:
|
|
case FINGERPRINT_BASE64:
|
|
if (!chromaprint_encode_fingerprint(fp, size, cpr->algorithm, &enc_fp, &enc_size,
|
|
cpr->fp_format == FINGERPRINT_BASE64)) {
|
|
av_log(s, AV_LOG_ERROR, "Failed to encode fingerprint\n");
|
|
goto fail;
|
|
}
|
|
avio_write(pb, enc_fp, enc_size);
|
|
break;
|
|
}
|
|
|
|
ret = 0;
|
|
fail:
|
|
if (fp)
|
|
chromaprint_dealloc(fp);
|
|
if (enc_fp)
|
|
chromaprint_dealloc(enc_fp);
|
|
cleanup(cpr);
|
|
return ret;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(ChromaprintMuxContext, x)
|
|
#define FLAGS AV_OPT_FLAG_ENCODING_PARAM
|
|
static const AVOption options[] = {
|
|
{ "silence_threshold", "threshold for detecting silence", OFFSET(silence_threshold), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 32767, FLAGS },
|
|
{ "algorithm", "version of the fingerprint algorithm", OFFSET(algorithm), AV_OPT_TYPE_INT, { .i64 = CHROMAPRINT_ALGORITHM_DEFAULT }, CHROMAPRINT_ALGORITHM_TEST1, INT_MAX, FLAGS },
|
|
{ "fp_format", "fingerprint format to write", OFFSET(fp_format), AV_OPT_TYPE_INT, { .i64 = FINGERPRINT_BASE64 }, FINGERPRINT_RAW, FINGERPRINT_BASE64, FLAGS, "fp_format" },
|
|
{ "raw", "binary raw fingerprint", 0, AV_OPT_TYPE_CONST, {.i64 = FINGERPRINT_RAW }, INT_MIN, INT_MAX, FLAGS, "fp_format"},
|
|
{ "compressed", "binary compressed fingerprint", 0, AV_OPT_TYPE_CONST, {.i64 = FINGERPRINT_COMPRESSED }, INT_MIN, INT_MAX, FLAGS, "fp_format"},
|
|
{ "base64", "Base64 compressed fingerprint", 0, AV_OPT_TYPE_CONST, {.i64 = FINGERPRINT_BASE64 }, INT_MIN, INT_MAX, FLAGS, "fp_format"},
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass chromaprint_class = {
|
|
.class_name = "chromaprint muxer",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVOutputFormat ff_chromaprint_muxer = {
|
|
.name = "chromaprint",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Chromaprint"),
|
|
.priv_data_size = sizeof(ChromaprintMuxContext),
|
|
.audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
|
|
.write_header = write_header,
|
|
.write_packet = write_packet,
|
|
.write_trailer = write_trailer,
|
|
.flags = AVFMT_NOTIMESTAMPS,
|
|
.priv_class = &chromaprint_class,
|
|
};
|