diff options
Diffstat (limited to 'sys/dxr3/ac3_padder.c')
| -rw-r--r-- | sys/dxr3/ac3_padder.c | 178 |
1 files changed, 89 insertions, 89 deletions
diff --git a/sys/dxr3/ac3_padder.c b/sys/dxr3/ac3_padder.c index 606923a7..9e778bac 100644 --- a/sys/dxr3/ac3_padder.c +++ b/sys/dxr3/ac3_padder.c @@ -152,101 +152,101 @@ ac3p_parse (ac3_padder * padder) while (padder->remaining > 0) { switch (padder->state) { case AC3P_STATE_SYNC1: - if (*(padder->in_ptr) == 0x0b) { - /* The first sync byte was found. Go to the next state. */ - padder->frame.sync_byte1 = 0x0b; - padder->state = AC3P_STATE_SYNC2; - } - ac3p_in_fw (padder); - break; + if (*(padder->in_ptr) == 0x0b) { + /* The first sync byte was found. Go to the next state. */ + padder->frame.sync_byte1 = 0x0b; + padder->state = AC3P_STATE_SYNC2; + } + ac3p_in_fw (padder); + break; case AC3P_STATE_SYNC2: - if (*(padder->in_ptr) == 0x77) { - /* The second sync byte was seen right after the first. Go to - the next state. */ - padder->frame.sync_byte2 = 0x77; - padder->state = AC3P_STATE_HEADER; - - /* Skip one byte. */ - ac3p_in_fw (padder); - - /* Prepare for reading the header. */ - padder->out_ptr = (guchar *) & (padder->frame.crc1); - /* Discount the 2 sync bytes from the header size. */ - padder->bytes_to_copy = AC3P_AC3_HEADER_SIZE - 2; - } else { - /* The second sync byte was not seen. Go back to the - first state. */ - padder->state = AC3P_STATE_SYNC1; - } - break; + if (*(padder->in_ptr) == 0x77) { + /* The second sync byte was seen right after the first. Go to + the next state. */ + padder->frame.sync_byte2 = 0x77; + padder->state = AC3P_STATE_HEADER; + + /* Skip one byte. */ + ac3p_in_fw (padder); + + /* Prepare for reading the header. */ + padder->out_ptr = (guchar *) & (padder->frame.crc1); + /* Discount the 2 sync bytes from the header size. */ + padder->bytes_to_copy = AC3P_AC3_HEADER_SIZE - 2; + } else { + /* The second sync byte was not seen. Go back to the + first state. */ + padder->state = AC3P_STATE_SYNC1; + } + break; case AC3P_STATE_HEADER: - if (padder->bytes_to_copy > 0) { - /* Copy one byte. */ - *(padder->out_ptr) = *(padder->in_ptr); - ac3p_in_fw (padder); - ac3p_out_fw (padder); - } else { - int fscod; - - /* The header is ready: */ - - fscod = (padder->frame.code >> 6) & 0x03; - - /* Calculate the frame size. */ - padder->ac3_frame_size = - 2 * frmsizecod_tbl[padder->frame.code & 0x3f].frm_size[fscod]; - - /* Set up the IEC header. */ - if (padder->ac3_frame_size > 0) { - padder->frame.header[4] = IEC61937_DATA_TYPE_AC3; - } else { - /* Don't know what it is, better be careful. */ - padder->state = AC3P_STATE_SYNC1; - break; - } - padder->frame.header[5] = 0x00; - padder->frame.header[6] = (padder->ac3_frame_size * 8) & 0xFF; - padder->frame.header[7] = ((padder->ac3_frame_size * 8) >> 8) & 0xFF; - - /* Prepare for reading the body. */ - padder->bytes_to_copy = padder->ac3_frame_size - AC3P_AC3_HEADER_SIZE; - padder->state = AC3P_STATE_CONTENT; - } - break; + if (padder->bytes_to_copy > 0) { + /* Copy one byte. */ + *(padder->out_ptr) = *(padder->in_ptr); + ac3p_in_fw (padder); + ac3p_out_fw (padder); + } else { + int fscod; + + /* The header is ready: */ + + fscod = (padder->frame.code >> 6) & 0x03; + + /* Calculate the frame size. */ + padder->ac3_frame_size = + 2 * frmsizecod_tbl[padder->frame.code & 0x3f].frm_size[fscod]; + + /* Set up the IEC header. */ + if (padder->ac3_frame_size > 0) { + padder->frame.header[4] = IEC61937_DATA_TYPE_AC3; + } else { + /* Don't know what it is, better be careful. */ + padder->state = AC3P_STATE_SYNC1; + break; + } + padder->frame.header[5] = 0x00; + padder->frame.header[6] = (padder->ac3_frame_size * 8) & 0xFF; + padder->frame.header[7] = ((padder->ac3_frame_size * 8) >> 8) & 0xFF; + + /* Prepare for reading the body. */ + padder->bytes_to_copy = padder->ac3_frame_size - AC3P_AC3_HEADER_SIZE; + padder->state = AC3P_STATE_CONTENT; + } + break; case AC3P_STATE_CONTENT: - if (padder->bytes_to_copy > 0) { - /* Copy one byte. */ - *(padder->out_ptr) = *(padder->in_ptr); - ac3p_in_fw (padder); - ac3p_out_fw (padder); - } else { - guint16 *ptr, i; - - /* Frame ready. Prepare for output: */ - - /* Zero the non AC3 portion of the padded frame. */ - memset (&(padder->frame.sync_byte1) + padder->ac3_frame_size, 0, - AC3P_IEC_FRAME_SIZE - AC3P_IEC_HEADER_SIZE - - padder->ac3_frame_size); - - /* Fix the byte order in the AC3 portion: */ - ptr = (guint16 *) & (padder->frame.sync_byte1); - i = padder->ac3_frame_size / 2; - while (i > 0) { - *ptr = GUINT16_TO_BE (*ptr); - ptr++; - i--; - } - - /* Start over again. */ - padder->state = AC3P_STATE_SYNC1; - - return AC3P_EVENT_FRAME; - } - break; + if (padder->bytes_to_copy > 0) { + /* Copy one byte. */ + *(padder->out_ptr) = *(padder->in_ptr); + ac3p_in_fw (padder); + ac3p_out_fw (padder); + } else { + guint16 *ptr, i; + + /* Frame ready. Prepare for output: */ + + /* Zero the non AC3 portion of the padded frame. */ + memset (&(padder->frame.sync_byte1) + padder->ac3_frame_size, 0, + AC3P_IEC_FRAME_SIZE - AC3P_IEC_HEADER_SIZE - + padder->ac3_frame_size); + + /* Fix the byte order in the AC3 portion: */ + ptr = (guint16 *) & (padder->frame.sync_byte1); + i = padder->ac3_frame_size / 2; + while (i > 0) { + *ptr = GUINT16_TO_BE (*ptr); + ptr++; + i--; + } + + /* Start over again. */ + padder->state = AC3P_STATE_SYNC1; + + return AC3P_EVENT_FRAME; + } + break; } } |