bool is_7bit() const
{ return is_any() && !is_14bit(); }
// 주의 반드시 frame 단위로 입력 되어야 한다.
int spdif_parser_frame(unsigned char* frame, int size,int codec_type,int usr_mode,int dts_mode)
{
int spdif_frame_size;
unsigned char *raw_frame;
int raw_size;
int payload_size;
int frame_grows;
int frame_shrinks;
// 1. 입력된 codec type에 맞추어 정보를 추출한다.
switch(codec_type)
{
case FORMAT_DTS:
if(!dts_header_parse(frame,&spdif_parse_t->hdr))
{
printf("DTS HEADER PARSE eRROR\n");
return 0;
}
break;
case FORMAT_AC3:
if(!ac3_header_parse(frame,&spdif_parse_t->hdr))
{
printf("ac3 HEADER PARSE eRROR\n");
return 0;
}
break;
default:
printf("Error!!! not support!\n");
return 0;
}
raw_frame = frame;
raw_size = size;
// 2. SPDIF frame size를 계산한다.
spdif_frame_size = spdif_parse_t->hdr.nsamples*4;
if(spdif_frame_size > MAX_SPDIF_FRAME_SIZE)
{
printf("Error!!! MAX SPDIR FRAME size %d\n",spdif_frame_size);
return 0;
}
spdif_parse_t->spdif_frame_size = spdif_frame_size;
// 3 codec_type 별로 별도의 작업 진행.
if(codec_type == FORMAT_DTS)
{
// 14 or 16.
// DTS frame may grow if conversion to 14bit stream format is used
if((usr_mode == DTS_CONV_14BIT) && !is_14bit(spdif_parse_t->hdr.bs_type))
{
frame_grows = 1;
}else{
frame_grows = 0;
}
if((usr_mode == DTS_CONV_16BIT) && is_14bit(spdif_parse_t->hdr.bs_type))
{
frame_shrinks = 1;
}else{
frame_shrinks = 0;
}
switch (dts_mode)
{
case DTS_MODE_WRAPPED:
spdif_parse_t->use_header = TRUE;
if (frame_grows && (raw_size * 8 / 7 <= spdif_frame_size - sizeof(spdif_header_type_s)))
spdif_parse_t->spdif_bs = BITSTREAM_14LE;
else if (frame_shrinks && (raw_size * 7 / 8 <= spdif_frame_size - sizeof(spdif_header_type_s)))
spdif_parse_t->spdif_bs = BITSTREAM_16LE;
else if (raw_size <= spdif_frame_size - sizeof(spdif_header_type_s))
spdif_parse_t->spdif_bs = is_14bit(spdif_parse_t->hdr.bs_type) ? BITSTREAM_14LE: BITSTREAM_16LE;
else
{
// impossible to wrap
printf("impossible to wrap\n");
return 0;
}
break;
case DTS_MODE_PADDED:
spdif_parse_t->use_header = FALSE;
if (frame_grows && (raw_size * 8 / 7 <= spdif_frame_size))
spdif_parse_t->spdif_bs = BITSTREAM_14LE;
else if (frame_shrinks && (raw_size * 7 / 8 <= spdif_frame_size))
spdif_parse_t->spdif_bs = BITSTREAM_16LE;
else if (raw_size <= spdif_frame_size)
spdif_parse_t->spdif_bs = is_14bit(spdif_parse_t->hdr.bs_type)? BITSTREAM_14LE: BITSTREAM_16LE;
else
{
// impossible to send over spdif
// passthrough non-spdifable data
printf("impossible to send over spdif\n");
return 0;
}
break;
case DTS_MODE_AUTO:
default:
if (frame_grows && (raw_size * 8 / 7 <= spdif_frame_size - sizeof(spdif_header_type_s)))
{
spdif_parse_t->use_header = TRUE;
spdif_parse_t->spdif_bs = BITSTREAM_14LE;
}
else if (frame_grows && (raw_size * 8 / 7 <= spdif_frame_size))
{
spdif_parse_t->use_header = FALSE;
spdif_parse_t->spdif_bs = BITSTREAM_14LE;
}
if (frame_shrinks && (raw_size * 7 / 8 <= spdif_frame_size - sizeof(spdif_header_type_s)))
{
spdif_parse_t->use_header = TRUE;
spdif_parse_t->spdif_bs = BITSTREAM_14LE;
}
else if (frame_shrinks && (raw_size * 7 / 8 <= spdif_frame_size))
{
spdif_parse_t->use_header = FALSE;
spdif_parse_t->spdif_bs = BITSTREAM_14LE;
}
else if (raw_size <= spdif_frame_size - sizeof(spdif_header_type_s))
{
spdif_parse_t->use_header = TRUE;
spdif_parse_t->spdif_bs = is_14bit(spdif_parse_t->hdr.bs_type)? BITSTREAM_14LE: BITSTREAM_16LE;
}
else if (raw_size <= spdif_frame_size)
{
spdif_parse_t->use_header = FALSE;
spdif_parse_t->spdif_bs = is_14bit(spdif_parse_t->hdr.bs_type)? BITSTREAM_14LE: BITSTREAM_16LE;
}
else
{
// impossible to send over spdif
// passthrough non-spdifable data
printf("impossible to send over spdif\n");
return 0;
}
break;
}
}else{
if (raw_size <= spdif_frame_size - sizeof(spdif_header_type_s))
{
spdif_parse_t->use_header = TRUE;
spdif_parse_t->spdif_bs = BITSTREAM_16LE;
}
else
{
printf("ERROR!!!\n");
return 0;
}
}
// 4.
if(spdif_parse_t->use_header)
{
payload_size = bs_convert(raw_frame, raw_size, spdif_parse_t->hdr.bs_type, &spdif_parse_t->buf[sizeof(spdif_header_type_s)], spdif_parse_t->spdif_bs);
memset(&spdif_parse_t->buf[sizeof(spdif_header_type_s) + payload_size], 0, spdif_frame_size - sizeof(spdif_header_type_s) - payload_size);
// We must correct DTS synword when converting to 14bit
if (spdif_parse_t->spdif_bs == BITSTREAM_14LE)
{
spdif_parse_t->buf[sizeof(spdif_header_type_s) + 3] = 0xe8;
}
spdif_make_header(&spdif_parse_t->buf[0],spdif_parse_t->hdr.spdif_type,(unsigned short)payload_size*8);
}else{
payload_size = bs_convert(raw_frame, raw_size, spdif_parse_t->hdr.bs_type, &spdif_parse_t->buf[0], spdif_parse_t->spdif_bs);
memset(&spdif_parse_t->buf[payload_size], 0, spdif_frame_size - payload_size);
// We must correct DTS synword when converting to 14bit
if(spdif_parse_t->spdif_bs == BITSTREAM_14LE)
spdif_parse_t->buf[3] = 0xe8;
}
if (!payload_size)
{
printf("Error!!! payload_size %d\n",payload_size);
return 0;
}
// 5. send spdif frame..
return 1;
}
