flvenc.c File Reference

#include "libavutil/attributes.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "libavutil/intfloat.h"
#include "libavutil/avassert.h"
#include "libavutil/mastering_display_metadata.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem.h"
#include "libavcodec/codec_desc.h"
#include "libavcodec/mpeg4audio.h"
#include "avio.h"
#include "avc.h"
#include "av1.h"
#include "vpcc.h"
#include "hevc.h"
#include "vvc.h"
#include "avformat.h"
#include "flv.h"
#include "internal.h"
#include "nal.h"
#include "mux.h"
#include "libavutil/opt.h"
#include "libavcodec/put_bits.h"

Go to the source code of this file.

Data Structures
struct	FLVFileposition
struct	FLVContext

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_eos_tag (AVIOContext *pb, unsigned ts, enum AVCodecID codec_id)
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 void	write_codec_fourcc (AVIOContext *pb, enum AVCodecID codec_id)
static void	flv_write_metadata_packet (AVFormatContext *s, AVCodecParameters *par, unsigned int ts, int stream_idx)
static int	unsupported_codec (AVFormatContext *s, const char *type, int codec_id)
static void	flv_write_aac_header (AVFormatContext *s, AVCodecParameters *par)
static void	flv_write_multichannel_body (AVFormatContext *s, AVCodecParameters *par)
static int	flv_get_multichannel_body_size (AVCodecParameters *par)
static void	flv_write_multichannel_header (AVFormatContext *s, AVCodecParameters *par, int64_t ts, int stream_index)
static void	flv_write_codec_header (AVFormatContext *s, AVCodecParameters *par, int64_t ts, int stream_index)
static int	flv_append_keyframe_info (AVFormatContext *s, FLVContext *flv, double ts, int64_t pos)
static int	shift_data (AVFormatContext *s)
static int	flv_init (struct 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)
static int	flv_check_bitstream (AVFormatContext *s, AVStream *st, const AVPacket *pkt)
static void	flv_deinit (AVFormatContext *s)

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
const FFOutputFormat	ff_flv_muxer

Enumeration Type Documentation

FLVFlags

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 82 of file flvenc.c.

Function Documentation

get_audio_flags()

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

static

Definition at line 141 of file flvenc.c.

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

put_amf_string()

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

static

Definition at line 244 of file flvenc.c.

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

put_timestamp()

static void put_timestamp ( AVIOContext * pb, int64_t ts )

static

Definition at line 255 of file flvenc.c.

Referenced by flv_write_codec_header(), flv_write_metadata_packet(), flv_write_multichannel_header(), flv_write_packet(), put_eos_tag(), and write_metadata().

put_eos_tag()

static void put_eos_tag ( AVIOContext * pb, unsigned ts, enum AVCodecID codec_id )

static

Definition at line 260 of file flvenc.c.

Referenced by flv_write_trailer().

put_amf_double()

static void put_amf_double ( AVIOContext * pb, double d )

static

Definition at line 275 of file flvenc.c.

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

put_amf_byte()

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

static

Definition at line 281 of file flvenc.c.

Referenced by write_metadata().

put_amf_dword_array()

static void put_amf_dword_array ( AVIOContext * pb, uint32_t dw )

static

Definition at line 286 of file flvenc.c.

Referenced by flv_write_trailer().

put_amf_bool()

static void put_amf_bool ( AVIOContext * pb, int b )

static

Definition at line 292 of file flvenc.c.

Referenced by write_metadata().

write_metadata()

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

static

Definition at line 298 of file flvenc.c.

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

write_codec_fourcc()

static void write_codec_fourcc ( AVIOContext * pb, enum AVCodecID codec_id )

static

Definition at line 500 of file flvenc.c.

Referenced by flv_write_codec_header(), flv_write_metadata_packet(), flv_write_multichannel_header(), and flv_write_packet().

flv_write_metadata_packet()

static void flv_write_metadata_packet ( AVFormatContext * s, AVCodecParameters * par, unsigned int ts, int stream_idx )

static

Definition at line 542 of file flvenc.c.

Referenced by flv_write_packet().

unsupported_codec()

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

static

Definition at line 675 of file flvenc.c.

Referenced by flv_init().

flv_write_aac_header()

static void flv_write_aac_header ( AVFormatContext * s, AVCodecParameters * par )

static

Definition at line 686 of file flvenc.c.

Referenced by flv_write_codec_header().

flv_write_multichannel_body()

static void flv_write_multichannel_body ( AVFormatContext * s, AVCodecParameters * par )

static

Definition at line 722 of file flvenc.c.

Referenced by flv_write_multichannel_header().

flv_get_multichannel_body_size()

static int flv_get_multichannel_body_size ( AVCodecParameters * par )

static

Definition at line 763 of file flvenc.c.

Referenced by flv_write_multichannel_header().

flv_write_multichannel_header()

static void flv_write_multichannel_header ( AVFormatContext * s, AVCodecParameters * par, int64_t ts, int stream_index )

static

Definition at line 775 of file flvenc.c.

Referenced by flv_write_codec_header().

flv_write_codec_header()

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

static

Definition at line 807 of file flvenc.c.

Referenced by flv_write_header(), and flv_write_packet().

flv_append_keyframe_info()

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

static

Definition at line 916 of file flvenc.c.

Referenced by flv_write_packet().

shift_data()

static int shift_data ( AVFormatContext * s )

static

Definition at line 943 of file flvenc.c.

Referenced by flv_write_trailer().

flv_init()

static int flv_init ( struct AVFormatContext * s )

static

Definition at line 972 of file flvenc.c.

flv_write_header()

static int flv_write_header ( AVFormatContext * s )

static

Definition at line 1083 of file flvenc.c.

flv_write_trailer()

static int flv_write_trailer ( AVFormatContext * s )

static

Definition at line 1120 of file flvenc.c.

flv_write_packet()

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

static

Definition at line 1210 of file flvenc.c.

flv_check_bitstream()

static int flv_check_bitstream ( AVFormatContext * s, AVStream * st, const AVPacket * pkt )

static

Definition at line 1488 of file flvenc.c.

flv_deinit()

static void flv_deinit ( AVFormatContext * s )

static

Definition at line 1505 of file flvenc.c.

Variable Documentation

flv_video_codec_ids

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_HEVC,     MKBETAG('h', 'v', 'c', '1') },
    { AV_CODEC_ID_VVC,      MKBETAG('v', 'v', 'c', '1') },
    { AV_CODEC_ID_AV1,      MKBETAG('a', 'v', '0', '1') },
    { AV_CODEC_ID_VP9,      MKBETAG('v', 'p', '0', '9') },
    { AV_CODEC_ID_NONE,     0 }
}

Definition at line 47 of file flvenc.c.

Referenced by flv_init(), flv_write_packet(), and put_eos_tag().

flv_audio_codec_ids

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_OPUS,       MKBETAG('O', 'p', 'u', 's') },
    { AV_CODEC_ID_FLAC,       MKBETAG('f', 'L', 'a', 'C') },
    { AV_CODEC_ID_AC3,        MKBETAG('a', 'c', '-', '3') },
    { AV_CODEC_ID_EAC3,       MKBETAG('e', 'c', '-', '3') },
    { AV_CODEC_ID_NONE,       0 }
}

Definition at line 64 of file flvenc.c.

options

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, .unit = "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, .unit = "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, .unit = "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, .unit = "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, .unit = "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, .unit = "flvflags" },
    { NULL },
}

Definition at line 1523 of file flvenc.c.

flv_muxer_class

const AVClass flv_muxer_class

static

Initial value:

= {
    .class_name = "flv muxer",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 1533 of file flvenc.c.

ff_flv_muxer

const FFOutputFormat ff_flv_muxer

Initial value:

= {
    .p.name         = "flv",
    .p.long_name    = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
    .p.mime_type    = "video/x-flv",
    .p.extensions   = "flv",
    .priv_data_size = sizeof(FLVContext),
    .p.audio_codec  = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF,
    .p.video_codec  = AV_CODEC_ID_FLV1,
    .init           = flv_init,
    .write_header   = flv_write_header,
    .write_packet   = flv_write_packet,
    .write_trailer  = flv_write_trailer,
    .deinit         = flv_deinit,
    .check_bitstream= flv_check_bitstream,
    .p.codec_tag    = (const AVCodecTag* const []) {
                          flv_video_codec_ids, flv_audio_codec_ids, 0
                      },
    .p.flags        = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
                      AVFMT_TS_NONSTRICT,
    .p.priv_class   = &flv_muxer_class,
}

Definition at line 1540 of file flvenc.c.

Referenced by hds_write_header().