31 #define SEEKPOINT_SIZE 18 50 int ret, metadata_last=0, metadata_type, metadata_size, found_streaminfo=0;
74 switch (metadata_type) {
85 if (
avio_read(s->
pb, buffer, metadata_size) != metadata_size) {
101 if (found_streaminfo) {
107 found_streaminfo = 1;
118 if (samplerate > 0) {
127 int i, chapters, track, ti;
128 if (metadata_size < 431)
130 offset = buffer + 395;
131 chapters = bytestream_get_byte(&offset) - 1;
134 for (i = 0; i < chapters; i++) {
135 if (offset + 36 - buffer > metadata_size)
137 start = bytestream_get_be64(&offset);
138 track = bytestream_get_byte(&offset);
142 ti = bytestream_get_byte(&offset);
160 for(i=0; i<seek_point_count; i++) {
161 int64_t timestamp = bytestream_get_be64(&seekpoint);
162 int64_t
pos = bytestream_get_be64(&seekpoint);
164 bytestream_get_be16(&seekpoint);
173 if (!found_streaminfo) {
183 }
else if (ret > 0) {
191 if (!mask || mask & ~0x3ffffULL) {
193 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
218 if ((p->
buf[2] & 0xF0) == 0)
220 if ((p->
buf[2] & 0x0F) == 0x0F)
225 if ((p->
buf[3] & 0x06) == 0x06)
227 if ((p->
buf[3] & 0x01) == 0x01)
245 if (memcmp(p->
buf,
"fLaC", 4))
249 min_block_size >= 16 &&
250 max_block_size >= min_block_size &&
251 sample_rate && sample_rate <= 655350)
260 int64_t *ppos, int64_t pos_limit)
292 pkt->
pts, pkt->
dts, *ppos);
342 .extensions =
"flac",
345 .priv_class = &flac_demuxer_class,
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
ptrdiff_t const GLvoid * data
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
#define AV_LOG_WARNING
Something somehow does not look correct.
int64_t next_frame_offset
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
AVFormatInternal * internal
An opaque field for libavformat internal usage.
int event_flags
Flags indicating events happening on the file, a combination of AVFMT_EVENT_FLAG_*.
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
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
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
enum AVStreamParseType need_parsing
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
AVStream ** streams
A list of all streams in the file.
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
int flags
Flags modifying the (de)muxer behaviour.
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
static const uint8_t header[24]
int ff_replaygain_export(AVStream *st, AVDictionary *metadata)
Parse replaygain tags and export them as per-stream side data.
uint64_t channel_layout
Audio only.
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
AVDictionary * metadata
Metadata that applies to the whole file.
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
static const uint16_t mask[17]
FLAC (Free Lossless Audio Codec) decoder/demuxer common functions.
unsigned int avio_rl32(AVIOContext *s)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
enum AVMediaType codec_type
General type of the encoded data.
#define FF_RAW_DEMUXER_CLASS(name)
int extradata_size
Size of the extradata content in bytes.
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.
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int64_t pts, int64_t dts, int64_t pos)
Parse a packet.
void av_parser_close(AVCodecParserContext *s)
#define FLAC_STREAMINFO_SIZE
static av_always_inline unsigned int bytestream_get_buffer(const uint8_t **b, uint8_t *dst, unsigned int size)
AVCodecParserContext * av_parser_init(int codec_id)
AVStreamInternal * internal
An opaque field for libavformat internal usage.
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_RB24
AVIOContext * pb
I/O context.
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Describe the class of an AVClass context structure.
static av_always_inline void flac_parse_block_header(const uint8_t *block_header, int *last, int *type, int *size)
Parse the metadata block parameters from the header.
This structure contains the data a format has to probe a file.
#define flags(name, subs,...)
int64_t duration
Decoding: duration of the stream, in stream time base.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
void * priv_data
Format private data.
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
int ff_flac_parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size, int truncate_workaround)
Filter the word “frame” indicates either a video frame or a group of audio samples
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
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
#define MKTAG(a, b, c, d)
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
#define AV_NOPTS_VALUE
Undefined timestamp value.
#define RETURN_ERROR(code)
#define FLAC_MAX_CHANNELS
#define PARSER_FLAG_USE_CODEC_TS