45 ext = strrchr(filename,
'.');
52 const char *mime_type)
60 #if CONFIG_IMAGE2_MUXER 61 if (!short_name && filename &&
79 if (score > score_max) {
88 const char *filename,
const char *mime_type,
100 #if CONFIG_IMAGE2_MUXER 101 if (!strcmp(fmt->
name,
"image2") || !strcmp(fmt->
name,
"image2pipe")) {
134 int score, score_max = 0;
139 ID3_ALMOST_GREATER_PROBE,
141 ID3_GREATER_MAX_PROBE,
145 lpd.
buf = (
unsigned char *) zerobuffer;
151 nodat = ID3_ALMOST_GREATER_PROBE;
155 nodat = ID3_GREATER_MAX_PROBE;
157 nodat = ID3_GREATER_PROBE;
171 score =
FFMAX(score, 1);
173 case ID3_GREATER_PROBE:
174 case ID3_ALMOST_GREATER_PROBE:
177 case ID3_GREATER_MAX_PROBE:
192 if (score > score_max) {
195 }
else if (score == score_max)
198 if (nodat == ID3_GREATER_PROBE)
200 *score_ret = score_max;
209 if (score_ret > *score_max) {
210 *score_max = score_ret;
223 const char *filename,
void *logctx,
224 unsigned int offset,
unsigned int max_probe_size)
228 int ret = 0, probe_size, buf_offset = 0;
236 "Specified probe size value %u cannot be < %u\n", max_probe_size,
PROBE_BUF_MIN);
240 if (offset >= max_probe_size)
247 pd.
mime_type = (
const char *)mime_type_opt;
263 probe_size =
FFMIN(probe_size << 1,
264 FFMAX(max_probe_size, probe_size + 1))) {
270 if ((ret =
avio_read(pb, buf + buf_offset,
271 probe_size - buf_offset)) < 0) {
280 if (buf_offset < offset)
293 "Format %s detected only with low score of %d, " 294 "misdetection possible!\n", (*fmt)->name, score);
297 "Format %s probed with size=%d and score=%d\n",
298 (*fmt)->name, probe_size, score);
300 FILE *f = fopen(
"probestat.tmp",
"ab");
301 fprintf(f,
"probe_size:%d format:%s score:%d filename:%s\n", probe_size, (*fmt)->name, score, filename);
317 return ret < 0 ? ret : score;
321 const char *filename,
void *logctx,
322 unsigned int offset,
unsigned int max_probe_size)
325 return ret < 0 ? ret : 0;
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define AV_LOG_WARNING
Something somehow does not look correct.
int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char **buf, int buf_size)
Rewind the AVIOContext using the specified buffer containing the first buf_size bytes of the file...
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
AVInputFormat * av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
Guess the file format.
Opaque data information usually continuous.
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
const AVClass * av_class
A class for private options.
#define AVERROR_EOF
End of file.
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
int av_probe_input_buffer2(AVIOContext *pb, AVInputFormat **fmt, const char *filename, void *logctx, unsigned int offset, unsigned int max_probe_size)
Probe a bytestream to determine the input format.
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
const AVOutputFormat * av_muxer_iterate(void **opaque)
Iterate over all registered muxers.
int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, const char *filename, void *logctx, unsigned int offset, unsigned int max_probe_size)
Like av_probe_input_buffer2() but returns 0 on success.
AVCodecID
Identify the syntax and semantics of the bitstream.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
int av_match_name(const char *name, const char *names)
Match instances of a name in a comma-separated list of names.
static const uint8_t offset[127][2]
AVInputFormat * av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
Guess the file format.
const char * mime_type
mime_type, when known.
int buf_size
Size of buf except extra allocated bytes.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
AVInputFormat * av_find_input_format(const char *short_name)
Find AVInputFormat based on the short name of the input format.
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, const char *filename, const char *mime_type, enum AVMediaType type)
Guess the codec ID based upon muxer and filename.
AVOutputFormat * av_guess_format(const char *short_name, const char *filename, const char *mime_type)
Return the output format in the list of registered output formats which best matches the provided par...
const AVInputFormat * av_demuxer_iterate(void **opaque)
Iterate over all registered demuxers.
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
int av_filename_number_test(const char *filename)
Check whether filename actually is a numbered sequence generator.
This structure contains the data a format has to probe a file.
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
enum AVCodecID ff_guess_image2_codec(const char *filename)
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
AVInputFormat * av_probe_input_format(AVProbeData *pd, int is_opened)
Guess the file format.