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242 lines
7.9 KiB
242 lines
7.9 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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#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 <[email protected]>, |
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* Takashi Iwai <[email protected]> |
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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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