154 lines
3.6 KiB
C
154 lines
3.6 KiB
C
/*****************************************************************************
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* flv_bytestream.c: flv muxer utilities
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*****************************************************************************
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* Copyright (C) 2009-2025 x264 project
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*
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* Authors: Kieran Kunhya <kieran@kunhya.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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*
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* This program is also available under a commercial proprietary license.
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* For more information, contact us at licensing@x264.com.
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*****************************************************************************/
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#include "output.h"
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#include "flv_bytestream.h"
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uint64_t flv_dbl2int( double value )
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{
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return (union {double f; uint64_t i;}){value}.i;
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}
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/* Put functions */
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void flv_put_byte( flv_buffer *c, uint8_t b )
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{
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flv_append_data( c, &b, 1 );
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}
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void flv_put_be32( flv_buffer *c, uint32_t val )
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{
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flv_put_byte( c, val >> 24 );
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flv_put_byte( c, val >> 16 );
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flv_put_byte( c, val >> 8 );
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flv_put_byte( c, val );
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}
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void flv_put_be64( flv_buffer *c, uint64_t val )
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{
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flv_put_be32( c, val >> 32 );
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flv_put_be32( c, val );
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}
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void flv_put_be16( flv_buffer *c, uint16_t val )
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{
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flv_put_byte( c, val >> 8 );
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flv_put_byte( c, val );
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}
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void flv_put_be24( flv_buffer *c, uint32_t val )
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{
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flv_put_be16( c, val >> 8 );
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flv_put_byte( c, val );
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}
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void flv_put_tag( flv_buffer *c, const char *tag )
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{
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while( *tag )
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flv_put_byte( c, *tag++ );
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}
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void flv_put_amf_string( flv_buffer *c, const char *str )
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{
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uint16_t len = strlen( str );
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flv_put_be16( c, len );
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flv_append_data( c, (uint8_t*)str, len );
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}
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void flv_put_amf_double( flv_buffer *c, double d )
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{
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flv_put_byte( c, AMF_DATA_TYPE_NUMBER );
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flv_put_be64( c, flv_dbl2int( d ) );
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}
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/* flv writing functions */
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flv_buffer *flv_create_writer( const char *filename )
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{
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flv_buffer *c = calloc( 1, sizeof(flv_buffer) );
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if( !c )
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return NULL;
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if( !strcmp( filename, "-" ) )
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c->fp = stdout;
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else
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c->fp = x264_fopen( filename, "wb" );
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if( !c->fp )
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{
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free( c );
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return NULL;
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}
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return c;
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}
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int flv_append_data( flv_buffer *c, uint8_t *data, unsigned size )
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{
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unsigned ns = c->d_cur + size;
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if( ns > c->d_max )
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{
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void *dp;
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unsigned dn = 16;
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while( ns > dn )
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dn <<= 1;
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dp = realloc( c->data, dn );
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if( !dp )
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return -1;
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c->data = dp;
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c->d_max = dn;
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}
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memcpy( c->data + c->d_cur, data, size );
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c->d_cur = ns;
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return 0;
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}
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void flv_rewrite_amf_be24( flv_buffer *c, unsigned length, unsigned start )
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{
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*(c->data + start + 0) = length >> 16;
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*(c->data + start + 1) = length >> 8;
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*(c->data + start + 2) = length >> 0;
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}
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int flv_flush_data( flv_buffer *c )
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{
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if( !c->d_cur )
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return 0;
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if( fwrite( c->data, c->d_cur, 1, c->fp ) != 1 )
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return -1;
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c->d_total += c->d_cur;
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c->d_cur = 0;
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return 0;
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}
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