40 #define KEYFRAMES_TAG "keyframes"
41 #define KEYFRAMES_TIMESTAMP_TAG "times"
42 #define KEYFRAMES_BYTEOFFSET_TAG "filepositions"
44 #define VALIDATE_INDEX_TS_THRESH 2500
51 int new_extradata_size[2];
70 d[3] < 5 && d[5] == 0 &&
99 switch (flv_codecid) {
102 codec_id = bits_per_coded_sample == 8
109 return codec_id == acodec->
codec_id;
111 codec_id = bits_per_coded_sample == 8
114 return codec_id == acodec->
codec_id;
141 switch (flv_codecid) {
205 switch (flv_codecid) {
224 int flv_codecid,
int read)
227 switch (flv_codecid) {
268 if (length >= buffsize) {
275 buffer[length] =
'\0';
284 unsigned int arraylen = 0, timeslen = 0, fileposlen = 0, i;
287 int64_t *times =
NULL;
288 int64_t *filepositions =
NULL;
297 int64_t *current_array;
310 if (!(times =
av_mallocz(
sizeof(*times) * arraylen))) {
315 current_array = times;
318 if (!(filepositions =
av_mallocz(
sizeof(*filepositions) * arraylen))) {
322 fileposlen = arraylen;
323 current_array = filepositions;
329 for (i = 0; i < arraylen &&
avio_tell(ioc) < max_pos - 1; i++) {
333 current_array[i] = num_val;
335 if (times && filepositions) {
343 if (!ret && timeslen == fileposlen) {
344 for (i = 0; i < fileposlen; i++) {
361 if (ret < 0 &&
avio_seek(ioc, initial_pos, SEEK_SET) > 0)
393 if ((vstream || astream) && key &&
425 unsigned int arraylen, i;
428 for (i = 0; i < arraylen &&
avio_tell(ioc) < max_pos - 1; i++)
442 if (depth == 1 && key) {
443 acodec = astream ? astream->
codec :
NULL;
444 vcodec = vstream ? vstream->
codec :
NULL;
448 if (!strcmp(key,
"duration"))
450 else if (!strcmp(key,
"videodatarate") && vcodec &&
451 0 <= (
int)(num_val * 1024.0))
452 vcodec->
bit_rate = num_val * 1024.0;
453 else if (!strcmp(key,
"audiodatarate") && acodec &&
454 0 <= (
int)(num_val * 1024.0))
455 acodec->
bit_rate = num_val * 1024.0;
456 else if (!strcmp(key,
"datastream")) {
462 if (!strcmp(key,
"videocodecid") && vcodec) {
464 }
else if (!strcmp(key,
"audiocodecid") && acodec) {
467 }
else if (!strcmp(key,
"audiosamplerate") && acodec) {
469 }
else if (!strcmp(key,
"audiosamplesize") && acodec) {
471 }
else if (!strcmp(key,
"stereo") && acodec) {
476 }
else if (!strcmp(key,
"width") && vcodec) {
477 vcodec->
width = num_val;
478 }
else if (!strcmp(key,
"height") && vcodec) {
484 if (!strcmp(key,
"duration") ||
485 !strcmp(key,
"filesize") ||
486 !strcmp(key,
"width") ||
487 !strcmp(key,
"height") ||
488 !strcmp(key,
"videodatarate") ||
489 !strcmp(key,
"framerate") ||
490 !strcmp(key,
"videocodecid") ||
491 !strcmp(key,
"audiodatarate") ||
492 !strcmp(key,
"audiosamplerate") ||
493 !strcmp(key,
"audiosamplesize") ||
494 !strcmp(key,
"stereo") ||
495 !strcmp(key,
"audiocodecid") ||
496 !strcmp(key,
"datastream"))
500 av_strlcpy(str_val, num_val > 0 ?
"true" :
"false",
504 snprintf(str_val,
sizeof(str_val),
"%.f", num_val);
516 AVStream *stream, *astream, *vstream;
533 if (!strcmp(buffer,
"onTextData"))
536 if (strcmp(buffer,
"onMetaData"))
567 "Broken FLV file, which says no streams present, "
568 "this might fail\n");
625 "Found invalid index entries, clearing the index.\n");
639 int nb = -1, ret, parse_name = 1;
679 int64_t dts, int64_t next)
748 int sample_rate = 0, channels = 0;
758 av_dlog(s,
"type:%d, size:%d, dts:%"PRId64
"\n", type, size, dts);
766 if (pos == validate_pos) {
774 }
else if (pos > validate_pos) {
793 if ((flags & 0xf0) == 0x50)
801 "skipping flv packet: type %d, size %d, flags %d\n",
819 }
else if (!is_audio &&
860 int bits_per_coded_sample;
902 "negative cts, previous timestamps might be wrong\n");
921 if (t && !strcmp(t->
value,
"Omnia A/XE"))
932 av_dlog(s,
"mp4a config channels %d sample rate %d\n",
982 int64_t ts,
int flags)
989 #define OFFSET(x) offsetof(FLVContext, x)
990 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
992 {
"flv_metadata",
"Allocate streams according to the onMetaData array",
OFFSET(trust_metadata),
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1,
VD },
1012 .extensions =
"flv",
1013 .priv_class = &
class,
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
discard all frames except keyframes
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int64_t avio_size(AVIOContext *s)
Get the filesize.
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.
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
int index
stream index in AVFormatContext
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
enum AVMediaType codec_type
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic?ac->func_descr_generic:ac->func_descr)
#define AV_CH_LAYOUT_STEREO
unsigned int avio_rb16(AVIOContext *s)
uint8_t * new_extradata[2]
int ctx_flags
Format-specific flags, see AVFMTCTX_xx.
AVDictionaryEntry * av_dict_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
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 av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Opaque data information usually continuous.
unsigned int avio_rb32(AVIOContext *s)
int wrong_dts
wrong dts due to negative cts
enum AVStreamParseType need_parsing
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
AVStream ** streams
A list of all streams in the file.
#define AVERROR_EOF
End of file.
static av_cold int read_close(AVFormatContext *ctx)
uint64_t avio_rb64(AVIOContext *s)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
int trust_metadata
configure streams according onMetaData
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
AVDictionary * metadata
Metadata that applies to the whole file.
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
discard all bidirectional frames
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
preferred ID for decoding MPEG audio layer 1, 2 or 3
void av_log(void *avcl, int level, const char *fmt,...)
AVStream * avformat_new_stream(AVFormatContext *s, AVCodec *c)
Add a new stream to a media file.
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 flags
A combination of AV_PKT_FLAG values.
uint64_t channel_layout
Audio channel layout.
int avio_r8(AVIOContext *s)
AVCodecContext * codec
Codec context associated with this stream.
struct FLVContext::@103 validate_index[2]
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
int bit_rate
the average bitrate
audio channel layout utility functions
unsigned int avio_rb24(AVIOContext *s)
#define AV_TIME_BASE
Internal time base represented as integer.
int width
picture width / height.
static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
static int read_header(FFV1Context *f)
#define AV_LOG_INFO
Standard information.
enum AVMediaType codec_type
int sample_rate
samples per second
AVIOContext * pb
I/O context.
main external API structure.
int new_extradata_size[2]
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
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.
This structure contains the data a format has to probe a file.
int64_t start_time
Position of the first frame of the component, in AV_TIME_BASE fractional seconds. ...
static const int32_t max_pos[4]
int avpriv_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, int bit_size, int sync_extension)
Parse MPEG-4 systems extradata to retrieve audio configuration.
int64_t avio_seek_time(AVIOContext *h, int stream_index, int64_t timestamp, int flags)
Seek to a given timestamp relative to some component stream.
int eof_reached
true if eof reached
int channels
number of audio channels
void * priv_data
Format private data.
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
#define AV_CH_LAYOUT_MONO
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
This structure stores compressed data.
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
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.