flv_bytestream.h
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/*****************************************************************************
* flv_bytestream.h: flv muxer utilities
*****************************************************************************
* Copyright (C) 2009-2024 x264 project
*
* Authors: Kieran Kunhya <kieran@kunhya.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
*
* This program is also available under a commercial proprietary license.
* For more information, contact us at licensing@x264.com.
*****************************************************************************/
#ifndef X264_FLV_BYTESTREAM_H
#define X264_FLV_BYTESTREAM_H
/* offsets for packed values */
#define FLV_AUDIO_SAMPLESSIZE_OFFSET 1
#define FLV_AUDIO_SAMPLERATE_OFFSET 2
#define FLV_AUDIO_CODECID_OFFSET 4
#define FLV_VIDEO_FRAMETYPE_OFFSET 4
/* bitmasks to isolate specific values */
#define FLV_AUDIO_CHANNEL_MASK 0x01
#define FLV_AUDIO_SAMPLESIZE_MASK 0x02
#define FLV_AUDIO_SAMPLERATE_MASK 0x0c
#define FLV_AUDIO_CODECID_MASK 0xf0
#define FLV_VIDEO_CODECID_MASK 0x0f
#define FLV_VIDEO_FRAMETYPE_MASK 0xf0
#define AMF_END_OF_OBJECT 0x09
enum
{
FLV_HEADER_FLAG_HASVIDEO = 1,
FLV_HEADER_FLAG_HASAUDIO = 4,
};
enum
{
FLV_TAG_TYPE_AUDIO = 0x08,
FLV_TAG_TYPE_VIDEO = 0x09,
FLV_TAG_TYPE_META = 0x12,
};
enum
{
FLV_MONO = 0,
FLV_STEREO = 1,
};
enum
{
FLV_SAMPLESSIZE_8BIT = 0,
FLV_SAMPLESSIZE_16BIT = 1 << FLV_AUDIO_SAMPLESSIZE_OFFSET,
};
enum
{
FLV_SAMPLERATE_SPECIAL = 0, /**< signifies 5512Hz and 8000Hz in the case of NELLYMOSER */
FLV_SAMPLERATE_11025HZ = 1 << FLV_AUDIO_SAMPLERATE_OFFSET,
FLV_SAMPLERATE_22050HZ = 2 << FLV_AUDIO_SAMPLERATE_OFFSET,
FLV_SAMPLERATE_44100HZ = 3 << FLV_AUDIO_SAMPLERATE_OFFSET,
};
enum
{
FLV_CODECID_MP3 = 2 << FLV_AUDIO_CODECID_OFFSET,
FLV_CODECID_AAC = 10<< FLV_AUDIO_CODECID_OFFSET,
};
enum
{
FLV_CODECID_H264 = 7,
};
enum
{
FLV_FRAME_KEY = 1 << FLV_VIDEO_FRAMETYPE_OFFSET,
FLV_FRAME_INTER = 2 << FLV_VIDEO_FRAMETYPE_OFFSET,
};
typedef enum
{
AMF_DATA_TYPE_NUMBER = 0x00,
AMF_DATA_TYPE_BOOL = 0x01,
AMF_DATA_TYPE_STRING = 0x02,
AMF_DATA_TYPE_OBJECT = 0x03,
AMF_DATA_TYPE_NULL = 0x05,
AMF_DATA_TYPE_UNDEFINED = 0x06,
AMF_DATA_TYPE_REFERENCE = 0x07,
AMF_DATA_TYPE_MIXEDARRAY = 0x08,
AMF_DATA_TYPE_OBJECT_END = 0x09,
AMF_DATA_TYPE_ARRAY = 0x0a,
AMF_DATA_TYPE_DATE = 0x0b,
AMF_DATA_TYPE_LONG_STRING = 0x0c,
AMF_DATA_TYPE_UNSUPPORTED = 0x0d,
} AMFDataType;
typedef struct flv_buffer
{
uint8_t *data;
unsigned d_cur;
unsigned d_max;
FILE *fp;
uint64_t d_total;
} flv_buffer;
flv_buffer *flv_create_writer( const char *filename );
int flv_append_data( flv_buffer *c, uint8_t *data, unsigned size );
int flv_write_byte( flv_buffer *c, uint8_t *byte );
int flv_flush_data( flv_buffer *c );
void flv_rewrite_amf_be24( flv_buffer *c, unsigned length, unsigned start );
uint64_t flv_dbl2int( double value );
void flv_put_byte( flv_buffer *c, uint8_t b );
void flv_put_be32( flv_buffer *c, uint32_t val );
void flv_put_be64( flv_buffer *c, uint64_t val );
void flv_put_be16( flv_buffer *c, uint16_t val );
void flv_put_be24( flv_buffer *c, uint32_t val );
void flv_put_tag( flv_buffer *c, const char *tag );
void flv_put_amf_string( flv_buffer *c, const char *str );
void flv_put_amf_double( flv_buffer *c, double d );
#endif