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26 #include <chromaprint.h>
28 #define CPR_VERSION_INT AV_VERSION_INT(CHROMAPRINT_VERSION_MAJOR, \
29 CHROMAPRINT_VERSION_MINOR, \
30 CHROMAPRINT_VERSION_PATCH)
45 #if CPR_VERSION_INT >= AV_VERSION_INT(1, 4, 0)
46 ChromaprintContext *
ctx;
48 ChromaprintContext
ctx;
58 chromaprint_free(cpr->
ctx);
78 #if CPR_VERSION_INT >= AV_VERSION_INT(0, 7, 0)
80 av_log(
s,
AV_LOG_ERROR,
"Failed to set silence threshold. Setting silence_threshold requires -algorithm 3 option.\n");
85 "version 0.7.0 or later.\n");
124 if (!chromaprint_finish(cpr->
ctx)) {
129 if (!chromaprint_get_raw_fingerprint(cpr->
ctx, (uint32_t **)&fp, &
size)) {
140 if (!chromaprint_encode_fingerprint(fp,
size, cpr->
algorithm, &enc_fp, &enc_size,
152 chromaprint_dealloc(fp);
154 chromaprint_dealloc(enc_fp);
158 #define OFFSET(x) offsetof(ChromaprintMuxContext, x)
159 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
161 {
"silence_threshold",
"threshold for detecting silence",
OFFSET(silence_threshold),
AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 32767,
FLAGS },
162 {
"algorithm",
"version of the fingerprint algorithm",
OFFSET(algorithm),
AV_OPT_TYPE_INT, { .i64 = CHROMAPRINT_ALGORITHM_DEFAULT }, CHROMAPRINT_ALGORITHM_TEST1, INT_MAX,
FLAGS },
178 .
p.
name =
"chromaprint",
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
static av_cold int init(AVFormatContext *s)
static void deinit(AVFormatContext *s)
const FFOutputFormat ff_chromaprint_muxer
#define FF_OFMT_FLAG_ONLY_DEFAULT_CODECS
If this flag is set, then the only permitted audio/video/subtitle codec ids are AVOutputFormat....
int nb_channels
Number of channels in this layout.
static int ff_mutex_unlock(AVMutex *mutex)
static const AVOption options[]
static int write_trailer(AVFormatContext *s)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
#define LIBAVUTIL_VERSION_INT
Describe the class of an AVClass context structure.
const char * av_default_item_name(void *ptr)
Return the context name.
AVChannelLayout ch_layout
Audio only.
int sample_rate
Audio only.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
#define AV_MUTEX_INITIALIZER
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
#define AVERROR_EXTERNAL
Generic error in an external library.
static int ff_mutex_lock(AVMutex *mutex)
static const AVClass chromaprint_class
#define FF_OFMT_FLAG_MAX_ONE_OF_EACH
If this flag is set, it indicates that for each codec type whose corresponding default codec (i....
static int write_packet(AVFormatContext *s, AVPacket *pkt)
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
static AVMutex chromaprint_mutex
@ AV_OPT_TYPE_INT
Underlying C type is int.
This structure stores compressed data.
FingerprintFormat fp_format
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.