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258 lines
8.6 KiB
C
258 lines
8.6 KiB
C
#ifndef __SOUND_CS8403_H
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#define __SOUND_CS8403_H
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/*
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* Routines for Cirrus Logic CS8403/CS8404A IEC958 (S/PDIF) Transmitter
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* Copyright (c) by Jaroslav Kysela <perex@suse.cz>,
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* Takashi Iwai <tiwai@suse.de>
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*
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifdef SND_CS8403
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#ifndef SND_CS8403_DECL
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#define SND_CS8403_DECL static
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#endif
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#ifndef SND_CS8403_DECODE
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#define SND_CS8403_DECODE snd_cs8403_decode_spdif_bits
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#endif
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#ifndef SND_CS8403_ENCODE
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#define SND_CS8403_ENCODE snd_cs8403_encode_spdif_bits
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#endif
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SND_CS8403_DECL void SND_CS8403_DECODE(struct snd_aes_iec958 *diga, unsigned char bits)
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{
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if (bits & 0x01) { /* consumer */
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if (!(bits & 0x02))
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diga->status[0] |= IEC958_AES0_NONAUDIO;
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if (!(bits & 0x08))
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diga->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
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switch (bits & 0x10) {
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case 0x10: diga->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE; break;
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case 0x00: diga->status[0] |= IEC958_AES0_CON_EMPHASIS_5015; break;
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}
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if (!(bits & 0x80))
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diga->status[1] |= IEC958_AES1_CON_ORIGINAL;
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switch (bits & 0x60) {
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case 0x00: diga->status[1] |= IEC958_AES1_CON_MAGNETIC_ID; break;
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case 0x20: diga->status[1] |= IEC958_AES1_CON_DIGDIGCONV_ID; break;
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case 0x40: diga->status[1] |= IEC958_AES1_CON_LASEROPT_ID; break;
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case 0x60: diga->status[1] |= IEC958_AES1_CON_GENERAL; break;
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}
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switch (bits & 0x06) {
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case 0x00: diga->status[3] |= IEC958_AES3_CON_FS_44100; break;
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case 0x02: diga->status[3] |= IEC958_AES3_CON_FS_48000; break;
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case 0x04: diga->status[3] |= IEC958_AES3_CON_FS_32000; break;
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}
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} else {
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diga->status[0] = IEC958_AES0_PROFESSIONAL;
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switch (bits & 0x18) {
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case 0x00: diga->status[0] |= IEC958_AES0_PRO_FS_32000; break;
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case 0x10: diga->status[0] |= IEC958_AES0_PRO_FS_44100; break;
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case 0x08: diga->status[0] |= IEC958_AES0_PRO_FS_48000; break;
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case 0x18: diga->status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
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}
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switch (bits & 0x60) {
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case 0x20: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NONE; break;
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case 0x40: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_5015; break;
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case 0x00: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_CCITT; break;
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case 0x60: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NOTID; break;
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}
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if (bits & 0x80)
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diga->status[1] |= IEC958_AES1_PRO_MODE_STEREOPHONIC;
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}
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}
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SND_CS8403_DECL unsigned char SND_CS8403_ENCODE(struct snd_aes_iec958 *diga)
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{
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unsigned char bits;
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if (!(diga->status[0] & IEC958_AES0_PROFESSIONAL)) {
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bits = 0x01; /* consumer mode */
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if (diga->status[0] & IEC958_AES0_NONAUDIO)
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bits &= ~0x02;
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else
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bits |= 0x02;
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if (diga->status[0] & IEC958_AES0_CON_NOT_COPYRIGHT)
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bits &= ~0x08;
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else
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bits |= 0x08;
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switch (diga->status[0] & IEC958_AES0_CON_EMPHASIS) {
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default:
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case IEC958_AES0_CON_EMPHASIS_NONE: bits |= 0x10; break;
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case IEC958_AES0_CON_EMPHASIS_5015: bits |= 0x00; break;
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}
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if (diga->status[1] & IEC958_AES1_CON_ORIGINAL)
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bits &= ~0x80;
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else
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bits |= 0x80;
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if ((diga->status[1] & IEC958_AES1_CON_CATEGORY) == IEC958_AES1_CON_GENERAL)
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bits |= 0x60;
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else {
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switch(diga->status[1] & IEC958_AES1_CON_MAGNETIC_MASK) {
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case IEC958_AES1_CON_MAGNETIC_ID:
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bits |= 0x00; break;
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case IEC958_AES1_CON_DIGDIGCONV_ID:
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bits |= 0x20; break;
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default:
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case IEC958_AES1_CON_LASEROPT_ID:
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bits |= 0x40; break;
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}
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}
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switch (diga->status[3] & IEC958_AES3_CON_FS) {
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default:
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case IEC958_AES3_CON_FS_44100: bits |= 0x00; break;
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case IEC958_AES3_CON_FS_48000: bits |= 0x02; break;
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case IEC958_AES3_CON_FS_32000: bits |= 0x04; break;
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}
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} else {
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bits = 0x00; /* professional mode */
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if (diga->status[0] & IEC958_AES0_NONAUDIO)
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bits &= ~0x02;
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else
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bits |= 0x02;
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/* CHECKME: I'm not sure about the bit order in val here */
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switch (diga->status[0] & IEC958_AES0_PRO_FS) {
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case IEC958_AES0_PRO_FS_32000: bits |= 0x00; break;
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case IEC958_AES0_PRO_FS_44100: bits |= 0x10; break; /* 44.1kHz */
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case IEC958_AES0_PRO_FS_48000: bits |= 0x08; break; /* 48kHz */
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default:
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case IEC958_AES0_PRO_FS_NOTID: bits |= 0x18; break;
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}
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switch (diga->status[0] & IEC958_AES0_PRO_EMPHASIS) {
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case IEC958_AES0_PRO_EMPHASIS_NONE: bits |= 0x20; break;
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case IEC958_AES0_PRO_EMPHASIS_5015: bits |= 0x40; break;
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case IEC958_AES0_PRO_EMPHASIS_CCITT: bits |= 0x00; break;
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default:
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case IEC958_AES0_PRO_EMPHASIS_NOTID: bits |= 0x60; break;
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}
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switch (diga->status[1] & IEC958_AES1_PRO_MODE) {
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case IEC958_AES1_PRO_MODE_TWO:
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case IEC958_AES1_PRO_MODE_STEREOPHONIC: bits |= 0x00; break;
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default: bits |= 0x80; break;
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}
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}
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return bits;
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}
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#endif /* SND_CS8403 */
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#ifdef SND_CS8404
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#ifndef SND_CS8404_DECL
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#define SND_CS8404_DECL static
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#endif
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#ifndef SND_CS8404_DECODE
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#define SND_CS8404_DECODE snd_cs8404_decode_spdif_bits
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#endif
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#ifndef SND_CS8404_ENCODE
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#define SND_CS8404_ENCODE snd_cs8404_encode_spdif_bits
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#endif
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SND_CS8404_DECL void SND_CS8404_DECODE(struct snd_aes_iec958 *diga, unsigned char bits)
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{
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if (bits & 0x10) { /* consumer */
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if (!(bits & 0x20))
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diga->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
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if (!(bits & 0x40))
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diga->status[0] |= IEC958_AES0_CON_EMPHASIS_5015;
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if (!(bits & 0x80))
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diga->status[1] |= IEC958_AES1_CON_ORIGINAL;
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switch (bits & 0x03) {
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case 0x00: diga->status[1] |= IEC958_AES1_CON_DAT; break;
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case 0x03: diga->status[1] |= IEC958_AES1_CON_GENERAL; break;
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}
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switch (bits & 0x06) {
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case 0x02: diga->status[3] |= IEC958_AES3_CON_FS_32000; break;
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case 0x04: diga->status[3] |= IEC958_AES3_CON_FS_48000; break;
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case 0x06: diga->status[3] |= IEC958_AES3_CON_FS_44100; break;
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}
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} else {
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diga->status[0] = IEC958_AES0_PROFESSIONAL;
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if (!(bits & 0x04))
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diga->status[0] |= IEC958_AES0_NONAUDIO;
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switch (bits & 0x60) {
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case 0x00: diga->status[0] |= IEC958_AES0_PRO_FS_32000; break;
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case 0x40: diga->status[0] |= IEC958_AES0_PRO_FS_44100; break;
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case 0x20: diga->status[0] |= IEC958_AES0_PRO_FS_48000; break;
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case 0x60: diga->status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
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}
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switch (bits & 0x03) {
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case 0x02: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NONE; break;
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case 0x01: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_5015; break;
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case 0x00: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_CCITT; break;
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case 0x03: diga->status[0] |= IEC958_AES0_PRO_EMPHASIS_NOTID; break;
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}
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if (!(bits & 0x80))
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diga->status[1] |= IEC958_AES1_PRO_MODE_STEREOPHONIC;
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}
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}
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SND_CS8404_DECL unsigned char SND_CS8404_ENCODE(struct snd_aes_iec958 *diga)
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{
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unsigned char bits;
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if (!(diga->status[0] & IEC958_AES0_PROFESSIONAL)) {
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bits = 0x10; /* consumer mode */
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if (!(diga->status[0] & IEC958_AES0_CON_NOT_COPYRIGHT))
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bits |= 0x20;
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if ((diga->status[0] & IEC958_AES0_CON_EMPHASIS) == IEC958_AES0_CON_EMPHASIS_NONE)
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bits |= 0x40;
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if (!(diga->status[1] & IEC958_AES1_CON_ORIGINAL))
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bits |= 0x80;
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if ((diga->status[1] & IEC958_AES1_CON_CATEGORY) == IEC958_AES1_CON_GENERAL)
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bits |= 0x03;
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switch (diga->status[3] & IEC958_AES3_CON_FS) {
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default:
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case IEC958_AES3_CON_FS_44100: bits |= 0x06; break;
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case IEC958_AES3_CON_FS_48000: bits |= 0x04; break;
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case IEC958_AES3_CON_FS_32000: bits |= 0x02; break;
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}
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} else {
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bits = 0x00; /* professional mode */
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if (!(diga->status[0] & IEC958_AES0_NONAUDIO))
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bits |= 0x04;
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switch (diga->status[0] & IEC958_AES0_PRO_FS) {
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case IEC958_AES0_PRO_FS_32000: bits |= 0x00; break;
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case IEC958_AES0_PRO_FS_44100: bits |= 0x40; break; /* 44.1kHz */
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case IEC958_AES0_PRO_FS_48000: bits |= 0x20; break; /* 48kHz */
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default:
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case IEC958_AES0_PRO_FS_NOTID: bits |= 0x00; break;
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}
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switch (diga->status[0] & IEC958_AES0_PRO_EMPHASIS) {
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case IEC958_AES0_PRO_EMPHASIS_NONE: bits |= 0x02; break;
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case IEC958_AES0_PRO_EMPHASIS_5015: bits |= 0x01; break;
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case IEC958_AES0_PRO_EMPHASIS_CCITT: bits |= 0x00; break;
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default:
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case IEC958_AES0_PRO_EMPHASIS_NOTID: bits |= 0x03; break;
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}
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switch (diga->status[1] & IEC958_AES1_PRO_MODE) {
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case IEC958_AES1_PRO_MODE_TWO:
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case IEC958_AES1_PRO_MODE_STEREOPHONIC: bits |= 0x00; break;
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default: bits |= 0x80; break;
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}
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}
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return bits;
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}
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#endif /* SND_CS8404 */
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#endif /* __SOUND_CS8403_H */
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