block_t *h264_create_avcdec_config_record( size_t i_nal_length_size,
struct nal_sps *p_sps,
const uint8_t *p_sps_buf,
size_t i_sps_size,
const uint8_t *p_pps_buf,
size_t i_pps_size )
{
bo_t bo;
/* The length of the NAL size is encoded using 1, 2 or 4 bytes */
if( i_nal_length_size != 1 && i_nal_length_size != 2
&& i_nal_length_size != 4 )
return NULL;
/* 6 * int(8), i_sps_size - 4, 1 * int(8), i_pps_size - 4 */
if( bo_init( &bo, 7 + i_sps_size + i_pps_size - 8 ) != true )
return NULL;
bo_add_8( &bo, 1 ); /* configuration version */
bo_add_8( &bo, p_sps->i_profile );
bo_add_8( &bo, p_sps->i_profile_compatibility );
bo_add_8( &bo, p_sps->i_level );
bo_add_8( &bo, 0xfc | (i_nal_length_size - 1) ); /* 0b11111100 | lengthsize - 1*/
bo_add_8( &bo, 0xe0 | (i_sps_size > 0 ? 1 : 0) ); /* 0b11100000 | sps_count */
if( i_sps_size > 4 )
{
/* the SPS data we have got includes 4 leading
* bytes which we need to remove */
bo_add_16be( &bo, i_sps_size - 4 );
bo_add_mem( &bo, i_sps_size - 4, p_sps_buf + 4 );
}
bo_add_8( &bo, (i_pps_size > 0 ? 1 : 0) ); /* pps_count */
if( i_pps_size > 4 )
{
/* the PPS data we have got includes 4 leading
* bytes which we need to remove */
bo_add_16be( &bo, i_pps_size - 4 );
bo_add_mem( &bo, i_pps_size - 4, p_pps_buf + 4 );
}
return bo.b;
}
block_t *h264_AnnexB_NAL_to_avcC( uint8_t i_nal_length_size,
const uint8_t *p_sps_buf,
size_t i_sps_size,
const uint8_t *p_pps_buf,
size_t i_pps_size )
{
if( i_pps_size > UINT16_MAX || i_sps_size > UINT16_MAX )
return NULL;
if( !hxxx_strip_AnnexB_startcode( &p_sps_buf, &i_sps_size ) ||
!hxxx_strip_AnnexB_startcode( &p_pps_buf, &i_pps_size ) )
return NULL;
/* The length of the NAL size is encoded using 1, 2 or 4 bytes */
if( i_nal_length_size != 1 && i_nal_length_size != 2
&& i_nal_length_size != 4 )
return NULL;
bo_t bo;
/* 6 * int(8), i_sps_size, 1 * int(8), i_pps_size */
if( bo_init( &bo, 7 + i_sps_size + i_pps_size ) != true )
return NULL;
bo_add_8( &bo, 1 ); /* configuration version */
bo_add_mem( &bo, 3, &p_sps_buf[1] ); /* i_profile/profile_compatibility/level */
bo_add_8( &bo, 0xfc | (i_nal_length_size - 1) ); /* 0b11111100 | lengthsize - 1*/
bo_add_8( &bo, 0xe0 | (i_sps_size > 0 ? 1 : 0) ); /* 0b11100000 | sps_count */
if( i_sps_size )
{
bo_add_16be( &bo, i_sps_size );
bo_add_mem( &bo, i_sps_size, p_sps_buf );
}
bo_add_8( &bo, (i_pps_size > 0 ? 1 : 0) ); /* pps_count */
if( i_pps_size )
{
bo_add_16be( &bo, i_pps_size );
bo_add_mem( &bo, i_pps_size, p_pps_buf );
}
return bo.b;
}