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flvenc.c File Reference
#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "libavutil/intfloat.h"
#include "libavutil/avassert.h"
#include "libavutil/mathematics.h"
#include "avio_internal.h"
#include "avio.h"
#include "avc.h"
#include "avformat.h"
#include "flv.h"
#include "internal.h"
#include "metadata.h"
#include "libavutil/opt.h"
#include "libavcodec/put_bits.h"
#include "libavcodec/aacenctab.h"

Go to the source code of this file.

Data Structures

struct  FLVFileposition
 
struct  FLVContext
 
struct  FLVStreamContext
 

Macros

#define READ_BLOCK
 

Enumerations

enum  FLVFlags {
  FLV_AAC_SEQ_HEADER_DETECT = (1 << 0), FLV_NO_SEQUENCE_END = (1 << 1), FLV_ADD_KEYFRAME_INDEX = (1 << 2), FLV_NO_METADATA = (1 << 3),
  FLV_NO_DURATION_FILESIZE = (1 << 4)
}
 

Functions

static int get_audio_flags (AVFormatContext *s, AVCodecParameters *par)
 
static void put_amf_string (AVIOContext *pb, const char *str)
 
static void put_timestamp (AVIOContext *pb, int64_t ts)
 
static void put_avc_eos_tag (AVIOContext *pb, unsigned ts)
 
static void put_amf_double (AVIOContext *pb, double d)
 
static void put_amf_byte (AVIOContext *pb, unsigned char abyte)
 
static void put_amf_dword_array (AVIOContext *pb, uint32_t dw)
 
static void put_amf_bool (AVIOContext *pb, int b)
 
static void write_metadata (AVFormatContext *s, unsigned int ts)
 
static int unsupported_codec (AVFormatContext *s, const char *type, int codec_id)
 
static void flv_write_codec_header (AVFormatContext *s, AVCodecParameters *par, int64_t ts)
 
static int flv_append_keyframe_info (AVFormatContext *s, FLVContext *flv, double ts, int64_t pos)
 
static int shift_data (AVFormatContext *s)
 
static int flv_write_header (AVFormatContext *s)
 
static int flv_write_trailer (AVFormatContext *s)
 
static int flv_write_packet (AVFormatContext *s, AVPacket *pkt)
 

Variables

static const AVCodecTag flv_video_codec_ids []
 
static const AVCodecTag flv_audio_codec_ids []
 
static const AVOption options []
 
static const AVClass flv_muxer_class
 
AVOutputFormat ff_flv_muxer
 

Macro Definition Documentation

#define READ_BLOCK
Value:
do { \
read_size[read_buf_id] = avio_read(read_pb, read_buf[read_buf_id], metadata_size); \
read_buf_id ^= 1; \
} while (0)
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:648

Referenced by shift_data().

Enumeration Type Documentation

enum FLVFlags
Enumerator
FLV_AAC_SEQ_HEADER_DETECT 
FLV_NO_SEQUENCE_END 
FLV_ADD_KEYFRAME_INDEX 
FLV_NO_METADATA 
FLV_NO_DURATION_FILESIZE 

Definition at line 66 of file flvenc.c.

Function Documentation

static int get_audio_flags ( AVFormatContext *  s,
AVCodecParameters *  par 
)
static

Definition at line 127 of file flvenc.c.

Referenced by flv_write_codec_header(), flv_write_header(), and flv_write_packet().

static void put_amf_string ( AVIOContext *  pb,
const char *  str 
)
static

Definition at line 226 of file flvenc.c.

Referenced by flv_write_packet(), flv_write_trailer(), and write_metadata().

static void put_timestamp ( AVIOContext *  pb,
int64_t  ts 
)
static

Definition at line 234 of file flvenc.c.

Referenced by flv_write_codec_header(), flv_write_packet(), and put_avc_eos_tag().

static void put_avc_eos_tag ( AVIOContext *  pb,
unsigned  ts 
)
static

Definition at line 239 of file flvenc.c.

Referenced by flv_write_trailer().

static void put_amf_double ( AVIOContext *  pb,
double  d 
)
static

Definition at line 251 of file flvenc.c.

Referenced by flv_write_trailer(), and write_metadata().

static void put_amf_byte ( AVIOContext *  pb,
unsigned char  abyte 
)
static

Definition at line 257 of file flvenc.c.

Referenced by write_metadata().

static void put_amf_dword_array ( AVIOContext *  pb,
uint32_t  dw 
)
static

Definition at line 262 of file flvenc.c.

Referenced by flv_write_trailer().

static void put_amf_bool ( AVIOContext *  pb,
int  b 
)
static

Definition at line 268 of file flvenc.c.

Referenced by write_metadata().

static void write_metadata ( AVFormatContext *  s,
unsigned int  ts 
)
static

Definition at line 274 of file flvenc.c.

Referenced by flv_write_header(), and flv_write_packet().

static int unsupported_codec ( AVFormatContext *  s,
const char *  type,
int  codec_id 
)
static

Definition at line 477 of file flvenc.c.

Referenced by flv_write_header().

static void flv_write_codec_header ( AVFormatContext *  s,
AVCodecParameters *  par,
int64_t  ts 
)
static

Definition at line 488 of file flvenc.c.

Referenced by flv_write_header(), and flv_write_packet().

static int flv_append_keyframe_info ( AVFormatContext *  s,
FLVContext *  flv,
double  ts,
int64_t  pos 
)
static

Definition at line 550 of file flvenc.c.

Referenced by flv_write_packet().

static int shift_data ( AVFormatContext *  s)
static

Definition at line 577 of file flvenc.c.

Referenced by flv_write_trailer().

static int flv_write_header ( AVFormatContext *  s)
static

Definition at line 657 of file flvenc.c.

static int flv_write_trailer ( AVFormatContext *  s)
static

Definition at line 770 of file flvenc.c.

static int flv_write_packet ( AVFormatContext *  s,
AVPacket *  pkt 
)
static

Definition at line 874 of file flvenc.c.

Variable Documentation

const AVCodecTag flv_video_codec_ids[]
static
Initial value:
= {
{ AV_CODEC_ID_FLV1, FLV_CODECID_H263 },
{ AV_CODEC_ID_H263, FLV_CODECID_REALH263 },
{ AV_CODEC_ID_MPEG4, FLV_CODECID_MPEG4 },
{ AV_CODEC_ID_FLASHSV, FLV_CODECID_SCREEN },
{ AV_CODEC_ID_FLASHSV2, FLV_CODECID_SCREEN2 },
{ AV_CODEC_ID_VP6F, FLV_CODECID_VP6 },
{ AV_CODEC_ID_VP6, FLV_CODECID_VP6 },
{ AV_CODEC_ID_VP6A, FLV_CODECID_VP6A },
{ AV_CODEC_ID_H264, FLV_CODECID_H264 },
{ AV_CODEC_ID_NONE, 0 }
}
AV_CODEC_ID_NONE
Definition: avcodec.h:216
AV_CODEC_ID_MPEG4
Definition: avcodec.h:230
AV_CODEC_ID_FLASHSV2
Definition: avcodec.h:349
AV_CODEC_ID_H264
Definition: avcodec.h:245
AV_CODEC_ID_VP6
Definition: avcodec.h:309
AV_CODEC_ID_FLV1
Definition: avcodec.h:239
AV_CODEC_ID_FLASHSV
Definition: avcodec.h:304
AV_CODEC_ID_VP6A
Definition: avcodec.h:324
AV_CODEC_ID_H263
Definition: avcodec.h:222
AV_CODEC_ID_VP6F
Definition: avcodec.h:310

Definition at line 39 of file flvenc.c.

const AVCodecTag flv_audio_codec_ids[]
static
Initial value:
= {
{ AV_CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET },
{ AV_CODEC_ID_PCM_U8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
{ AV_CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
{ AV_CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET },
{ AV_CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET },
{ AV_CODEC_ID_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET },
{ AV_CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET },
{ AV_CODEC_ID_PCM_MULAW, FLV_CODECID_PCM_MULAW >> FLV_AUDIO_CODECID_OFFSET },
{ AV_CODEC_ID_PCM_ALAW, FLV_CODECID_PCM_ALAW >> FLV_AUDIO_CODECID_OFFSET },
{ AV_CODEC_ID_SPEEX, FLV_CODECID_SPEEX >> FLV_AUDIO_CODECID_OFFSET },
{ AV_CODEC_ID_NONE, 0 }
}
AV_CODEC_ID_NONE
Definition: avcodec.h:216
AV_CODEC_ID_SPEEX
Definition: avcodec.h:593
AV_CODEC_ID_AAC
Definition: avcodec.h:560
AV_CODEC_ID_NELLYMOSER
Definition: avcodec.h:591
AV_CODEC_ID_PCM_ALAW
Definition: avcodec.h:465
AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:559
FLV_AUDIO_CODECID_OFFSET
#define FLV_AUDIO_CODECID_OFFSET
Definition: flv.h:34
AV_CODEC_ID_PCM_S16BE
Definition: avcodec.h:459
AV_CODEC_ID_PCM_U8
Definition: avcodec.h:463
AV_CODEC_ID_PCM_MULAW
Definition: avcodec.h:464
AV_CODEC_ID_PCM_S16LE
Definition: avcodec.h:458
AV_CODEC_ID_ADPCM_SWF
Definition: avcodec.h:510

Definition at line 52 of file flvenc.c.

const AVOption options[]
static
Initial value:
= {
{ "flvflags", "FLV muxer flags", 0x42, AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
{ "aac_seq_header_detect", "Put AAC sequence header based on stream data", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_AAC_SEQ_HEADER_DETECT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
{ "no_sequence_end", "disable sequence end for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_SEQUENCE_END}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
{ "no_metadata", "disable metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_METADATA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
{ "no_duration_filesize", "disable duration and filesize zero value metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_DURATION_FILESIZE}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
{ "add_keyframe_index", "Add keyframe index metadata", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_ADD_KEYFRAME_INDEX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
{ NULL },
}
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_FLAGS
Definition: opt.h:222
AV_OPT_TYPE_CONST
Definition: opt.h:232
AV_OPT_FLAG_ENCODING_PARAM
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:276

Definition at line 1077 of file flvenc.c.

const AVClass flv_muxer_class
static
Initial value:
= {
.class_name = "flv muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
}
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
options
static const AVOption options[]
Definition: flvenc.c:1077

Definition at line 1087 of file flvenc.c.

AVOutputFormat ff_flv_muxer
Initial value:
= {
.name = "flv",
.long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
.mime_type = "video/x-flv",
.extensions = "flv",
.priv_data_size = sizeof(FLVContext),
.audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF,
.video_codec = AV_CODEC_ID_FLV1,
.write_header = flv_write_header,
.write_packet = flv_write_packet,
.write_trailer = flv_write_trailer,
.codec_tag = (const AVCodecTag* const []) {
flv_video_codec_ids, flv_audio_codec_ids, 0
},
.flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
AVFMT_TS_NONSTRICT,
.priv_class = &flv_muxer_class,
}
write_packet
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:689
flv_audio_codec_ids
static const AVCodecTag flv_audio_codec_ids[]
Definition: flvenc.c:52
flv_muxer_class
static const AVClass flv_muxer_class
Definition: flvenc.c:1087
AVFMT_TS_NONSTRICT
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:479
flv_video_codec_ids
static const AVCodecTag flv_video_codec_ids[]
Definition: flvenc.c:39
AV_CODEC_ID_FLV1
Definition: avcodec.h:239
flv_write_trailer
static int flv_write_trailer(AVFormatContext *s)
Definition: flvenc.c:770
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:559
flv_write_packet
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: flvenc.c:874
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
AVFMT_GLOBALHEADER
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:468
flv_write_header
static int flv_write_header(AVFormatContext *s)
Definition: flvenc.c:657
AVFMT_VARIABLE_FPS
#define AVFMT_VARIABLE_FPS
Format allows variable fps.
Definition: avformat.h:472
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
AV_CODEC_ID_ADPCM_SWF
Definition: avcodec.h:510

Definition at line 1094 of file flvenc.c.

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