diff options
Diffstat (limited to 'src/liba52/xine_decoder.c')
| -rw-r--r-- | src/liba52/xine_decoder.c | 82 |
1 files changed, 76 insertions, 6 deletions
diff --git a/src/liba52/xine_decoder.c b/src/liba52/xine_decoder.c index 1c8da9e74..4fc3de135 100644 --- a/src/liba52/xine_decoder.c +++ b/src/liba52/xine_decoder.c @@ -17,11 +17,14 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA * - * $Id: xine_decoder.c,v 1.12 2001/11/20 01:43:30 guenter Exp $ + * $Id: xine_decoder.c,v 1.13 2001/12/09 18:31:01 jcdutton Exp $ * * stuff needed to turn liba52 into a xine decoder plugin */ +/* required for swab() */ +#define _XOPEN_SOURCE 500 + #include <stdlib.h> #include <unistd.h> @@ -77,6 +80,54 @@ typedef struct a52dec_decoder_s { int enable_surround_downmix; } a52dec_decoder_t; +struct frmsize_s +{ + uint16_t bit_rate; + uint16_t frm_size[3]; +}; + +static const struct frmsize_s frmsizecod_tbl[64] = +{ + { 32 ,{64 ,69 ,96 } }, + { 32 ,{64 ,70 ,96 } }, + { 40 ,{80 ,87 ,120 } }, + { 40 ,{80 ,88 ,120 } }, + { 48 ,{96 ,104 ,144 } }, + { 48 ,{96 ,105 ,144 } }, + { 56 ,{112 ,121 ,168 } }, + { 56 ,{112 ,122 ,168 } }, + { 64 ,{128 ,139 ,192 } }, + { 64 ,{128 ,140 ,192 } }, + { 80 ,{160 ,174 ,240 } }, + { 80 ,{160 ,175 ,240 } }, + { 96 ,{192 ,208 ,288 } }, + { 96 ,{192 ,209 ,288 } }, + { 112 ,{224 ,243 ,336 } }, + { 112 ,{224 ,244 ,336 } }, + { 128 ,{256 ,278 ,384 } }, + { 128 ,{256 ,279 ,384 } }, + { 160 ,{320 ,348 ,480 } }, + { 160 ,{320 ,349 ,480 } }, + { 192 ,{384 ,417 ,576 } }, + { 192 ,{384 ,418 ,576 } }, + { 224 ,{448 ,487 ,672 } }, + { 224 ,{448 ,488 ,672 } }, + { 256 ,{512 ,557 ,768 } }, + { 256 ,{512 ,558 ,768 } }, + { 320 ,{640 ,696 ,960 } }, + { 320 ,{640 ,697 ,960 } }, + { 384 ,{768 ,835 ,1152 } }, + { 384 ,{768 ,836 ,1152 } }, + { 448 ,{896 ,975 ,1344 } }, + { 448 ,{896 ,976 ,1344 } }, + { 512 ,{1024 ,1114 ,1536 } }, + { 512 ,{1024 ,1115 ,1536 } }, + { 576 ,{1152 ,1253 ,1728 } }, + { 576 ,{1152 ,1254 ,1728 } }, + { 640 ,{1280 ,1393 ,1920 } }, + { 640 ,{1280 ,1394 ,1920 } } +}; + int a52dec_can_handle (audio_decoder_t *this_gen, int buf_type) { return ((buf_type & 0xFFFF0000) == BUF_AUDIO_A52) ; } @@ -342,12 +393,31 @@ static void a52dec_decode_frame (a52dec_decoder_t *this, uint32_t pts, uint32_t } if (this->output_open) { - + /* SPDIF Passthrough + * Build SPDIF Header and encaps the A52 audio data in it. + */ + uint32_t syncword, crc1, fscod,frmsizecod,bsid,bsmod,frame_size; + uint8_t *data_out,*data_in; audio_buffer_t *buf = this->audio_out->get_buffer (this->audio_out); - - memcpy (buf->mem, this->frame_buffer, this->frame_length); - - buf->num_frames = this->frame_length; + data_in=(uint8_t *) this->frame_buffer; + data_out=(uint8_t *) buf->mem; + syncword = data_in[0] | (data_in[1] << 8); + crc1 = data_in[2] | (data_in[3] << 8); + fscod = (data_in[4] >> 6) & 0x3; + frmsizecod = data_in[4] & 0x3f; + bsid = (data_in[5] >> 3) & 0x1f; + bsmod = data_in[5] & 0x7; // bsmod, stream = 0 + frame_size = frmsizecod_tbl[frmsizecod].frm_size[fscod] ; + + data_out[0] = 0x72; data_out[1] = 0xf8; /* spdif syncword */ + data_out[2] = 0x1f; data_out[3] = 0x4e; /* .............. */ + data_out[4] = 0x01; /* AC3 data */ + data_out[5] = bsmod; /* bsmod, stream = 0 */ + data_out[6] = (frame_size << 4) & 0xff; /* frame_size * 16 */ + data_out[7] = ((frame_size ) >> 4) & 0xff; + swab(data_in, &data_out[8], frame_size * 2 ); + + buf->num_frames = 1536; buf->vpts = pts; buf->scr = scr; |