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32 #define ADTS_HEADER_SIZE 7
36 int max_frames = 0, first_frames = 0;
38 const uint8_t *buf0 = p->
buf;
41 const uint8_t *end = buf0 + p->
buf_size - 7;
45 for (; buf < end; buf = buf2 + 1) {
50 if ((
header & 0xFFF6) != 0xFFF0) {
71 if (first_frames >= 3)
73 else if (max_frames > 100)
75 else if (max_frames >= 3)
77 else if (first_frames >= 1)
93 if ((
state >> 4) != 0xFFF)
98 if (
s->pb->eof_reached)
100 if ((
state >> 4) != 0xFFF)
219 .mime_type =
"audio/aac,audio/aacp,audio/x-aac",
static void error(const char *err)
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
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 uint8_t * append(uint8_t *buf, const uint8_t *src, int size)
enum AVMediaType codec_type
General type of the encoded data.
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
#define AVERROR_EOF
End of file.
void ff_id3v1_read(AVFormatContext *s)
Read an ID3v1 tag.
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key,...
void ffio_init_read_context(FFIOContext *s, const uint8_t *buffer, int buffer_size)
Wrap a buffer in an AVIOContext for reading.
int buf_size
Size of buf except extra allocated bytes.
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
if it could not because there are no more frames
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
static int64_t fsize(FILE *f)
enum AVStreamParseType need_parsing
AVCodecParameters * codecpar
Codec parameters associated with this stream.
This structure contains the data a format has to probe a file.
#define ID3v2_HEADER_SIZE
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
static const uint8_t header[24]
int avio_r8(AVIOContext *s)
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
This structure stores compressed data.
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta)
Parse PRIV tags into a dictionary.
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.