45 ext = strrchr(filename,
'.');
64 for (ext = uc.
query; *ext !=
'.' && ext > uc.
path; ext--)
69 if (uc.
query - ext >
sizeof(scratchpad))
77 const char *mime_type)
85 #if CONFIG_IMAGE2_MUXER
86 if (!short_name && filename &&
104 if (score > score_max) {
113 const char *filename,
const char *mime_type,
125 #if CONFIG_IMAGE2_MUXER
126 if (!strcmp(fmt->name,
"image2") || !strcmp(fmt->name,
"image2pipe")) {
134 return fmt->audio_codec;
136 return fmt->subtitle_codec;
138 return fmt->data_codec;
159 int score, score_max = 0;
164 ID3_ALMOST_GREATER_PROBE,
166 ID3_GREATER_MAX_PROBE,
170 lpd.
buf = (
unsigned char *) zerobuffer;
176 nodat = ID3_ALMOST_GREATER_PROBE;
180 nodat = ID3_GREATER_MAX_PROBE;
182 nodat = ID3_GREATER_PROBE;
196 score =
FFMAX(score, 1);
198 case ID3_GREATER_PROBE:
199 case ID3_ALMOST_GREATER_PROBE:
202 case ID3_GREATER_MAX_PROBE:
217 if (score > score_max) {
220 }
else if (score == score_max)
223 if (nodat == ID3_GREATER_PROBE)
225 *score_ret = score_max;
234 if (score_ret > *score_max) {
235 *score_max = score_ret;
248 const char *filename,
void *logctx,
249 unsigned int offset,
unsigned int max_probe_size)
253 int ret = 0, probe_size, buf_offset = 0;
262 "Specified probe size value %u cannot be < %u\n", max_probe_size,
PROBE_BUF_MIN);
266 if (
offset >= max_probe_size)
273 pd.
mime_type = (
const char *)mime_type_opt;
280 for (probe_size =
PROBE_BUF_MIN; probe_size <= max_probe_size && !*fmt && !eof;
281 probe_size =
FFMIN(probe_size << 1,
282 FFMAX(max_probe_size, probe_size + 1))) {
288 if ((ret =
avio_read(pb, buf + buf_offset,
289 probe_size - buf_offset)) < 0) {
312 "Format %s detected only with low score of %d, "
313 "misdetection possible!\n", (*fmt)->name, score);
316 "Format %s probed with size=%d and score=%d\n",
317 (*fmt)->name, probe_size, score);
319 FILE *
f = fopen(
"probestat.tmp",
"ab");
320 fprintf(
f,
"probe_size:%d format:%s score:%d filename:%s\n", probe_size, (*fmt)->name, score, filename);
336 return ret < 0 ? ret : score;
340 const char *filename,
void *logctx,
341 unsigned int offset,
unsigned int max_probe_size)
344 return ret < 0 ? ret : 0;
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
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 AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
AVCodecID
Identify the syntax and semantics of the bitstream.
const AVOutputFormat * av_muxer_iterate(void **opaque)
Iterate over all registered muxers.
const AVInputFormat * av_demuxer_iterate(void **opaque)
Iterate over all registered demuxers.
int av_probe_input_buffer(AVIOContext *pb, ff_const59 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.
ff_const59 AVInputFormat * av_find_input_format(const char *short_name)
Find AVInputFormat based on the short name of the input format.
int av_probe_input_buffer2(AVIOContext *pb, ff_const59 AVInputFormat **fmt, const char *filename, void *logctx, unsigned int offset, unsigned int max_probe_size)
Probe a bytestream to determine the input format.
ff_const59 AVInputFormat * av_probe_input_format(ff_const59 AVProbeData *pd, int is_opened)
Guess the file format.
ff_const59 AVInputFormat * av_probe_input_format3(ff_const59 AVProbeData *pd, int is_opened, int *score_ret)
Guess the file format.
ff_const59 AVInputFormat * av_probe_input_format2(ff_const59 AVProbeData *pd, int is_opened, int *score_max)
Guess the file format.
ff_const59 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...
enum AVCodecID av_guess_codec(ff_const59 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.
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_filename_number_test(const char *filename)
Check whether filename actually is a numbered sequence generator.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define AVERROR_EOF
End of file.
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
#define AV_LOG_WARNING
Something somehow does not look correct.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
int av_match_name(const char *name, const char *names)
Match instances of a name in a comma-separated list of names.
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
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.
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
enum AVCodecID ff_guess_image2_codec(const char *filename)
common internal API header
const AVClass * av_class
A class for private options.
This structure contains the data a format has to probe a file.
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.
const char * query
including initial '?' if present
int ff_url_decompose(URLComponents *uc, const char *url, const char *end)
Parse an URL to find the components.
#define URL_COMPONENT_HAVE(uc, component)
static const uint8_t offset[127][2]