mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-10-29 05:40:25 -04:00
added a new plugin "iec958" to convert IEC958 subframes.
This commit is contained in:
Takashi Iwai
parent
253b58bc03
commit
5586e5cbb1
5 changed files with 626 additions and 3 deletions
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@ -354,6 +354,8 @@ enum _snd_pcm_type {
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SND_PCM_TYPE_DSNOOP,
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/** Direct Sharing plugin */
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SND_PCM_TYPE_DSHARE,
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/** IEC958 subframe plugin */
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SND_PCM_TYPE_IEC958,
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SND_PCM_TYPE_LAST = SND_PCM_TYPE_DSNOOP
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};
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@ -11,7 +11,7 @@ libpcm_la_SOURCES = atomic.c mask.c interval.c \
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pcm_shm.c pcm_file.c pcm_null.c pcm_share.c \
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pcm_meter.c pcm_hooks.c pcm_lfloat.c pcm_ladspa.c \
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pcm_direct.c pcm_dmix.c pcm_dsnoop.c pcm_dshare.c \
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pcm_asym.c pcm_symbols.c
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pcm_asym.c pcm_iec958.c pcm_symbols.c
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noinst_HEADERS = pcm_local.h pcm_plugin.h mask.h mask_inline.h \
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interval.h interval_inline.h plugin_ops.h ladspa.h \
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pcm_direct.h pcm_dmix_i386.h pcm_dmix_x86_64.h
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@ -1821,7 +1821,7 @@ snd_pcm_t *snd_async_handler_get_pcm(snd_async_handler_t *handler)
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static char *build_in_pcms[] = {
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"adpcm", "alaw", "copy", "dmix", "file", "hooks", "hw", "ladspa", "lfloat",
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"linear", "meter", "mulaw", "multi", "null", "plug", "rate", "route", "share",
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"shm", "dsnoop", "dshare", "asym", NULL
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"shm", "dsnoop", "dshare", "asym", "iec958", NULL
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};
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static int snd_pcm_open_conf(snd_pcm_t **pcmp, const char *name,
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619
src/pcm/pcm_iec958.c
Normal file
619
src/pcm/pcm_iec958.c
Normal file
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@ -0,0 +1,619 @@
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/**
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* \file pcm/pcm_iec958.c
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* \ingroup PCM_Plugins
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* \brief PCM IEC958 Subframe Conversion Plugin Interface
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* \author Takashi Iwai <tiwai@suse.de>
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* \date 2004
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*/
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/*
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* PCM - IEC958 Subframe Conversion Plugin
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* Copyright (c) 2004 by Takashi Iwai <tiwai@suse.de>
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*
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; 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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#include <byteswap.h>
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#include "pcm_local.h"
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#include "pcm_plugin.h"
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#ifndef PIC
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/* entry for static linking */
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const char *_snd_module_pcm_iec958 = "";
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#endif
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/*
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*/
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#ifndef DOC_HIDDEN
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typedef struct snd_pcm_iec958 snd_pcm_iec958_t;
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typedef void (*iec958_f)(snd_pcm_iec958_t *iec,
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const snd_pcm_channel_area_t *dst_areas,
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snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas,
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snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames);
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struct snd_pcm_iec958 {
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/* This field need to be the first */
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snd_pcm_plugin_t plug;
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unsigned int getput_idx;
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iec958_f func;
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snd_pcm_format_t sformat;
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snd_pcm_format_t format;
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unsigned int counter;
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unsigned char status[24];
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unsigned int byteswap;
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};
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#endif /* DOC_HIDDEN */
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/*
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* Determine parity for time slots 4 upto 30
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* to be sure that bit 4 upt 31 will carry
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* an even number of ones and zeros.
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*/
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static unsigned int iec958_parity(unsigned int data)
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{
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unsigned int parity;
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int bit;
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data >>= 4; /* start from bit 4 */
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parity = 0;
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for (bit = 4; bit <= 30; bit++) {
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if (data & 1)
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parity++;
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data >>= 1;
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}
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return (parity & 1);
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}
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/*
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* Compose 32bit IEC958 subframe, two sub frames
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* build one frame with two channels.
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*
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* bit 0-3 = preamble
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* 4-7 = AUX (=0)
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* 8-27 = data (12-27 for 16bit, 8-27 for 20bit, and 24bit without AUX)
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* 28 = validity (0 for valid data, else 'in error')
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* 29 = user data (0)
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* 30 = channel status (24 bytes for 192 frames)
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* 31 = parity
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*/
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static inline u_int32_t iec958_subframe(snd_pcm_iec958_t *iec, u_int32_t data, int channel)
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{
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unsigned int byte = iec->counter >> 3;
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unsigned int mask = 1 << (iec->counter - (byte << 3));
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/* bit 4-27 */
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data >>= 4;
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data &= ~0xf;
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/* set IEC status bits (up to 192 bits) */
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if (iec->status[byte] & mask)
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data |= 0x40000000;
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if (iec958_parity(data)) /* parity bit 4-30 */
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data |= 0x80000000;
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/* Preamble */
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if (! iec->counter)
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data |= 0x03; /* Block start, 'Z' */
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else if (! channel)
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data |= 0x05; /* odd sub frame, 'Y' */
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else
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data |= 0x09; /* even sub frame, 'X' */
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if (iec->byteswap)
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data = bswap_32(data);
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return data;
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}
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static inline int32_t iec958_to_s32(snd_pcm_iec958_t *iec, u_int32_t data)
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{
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if (iec->byteswap)
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data = bswap_32(data);
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data &= ~0xf;
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data <<= 4;
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return (int32_t)data;
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}
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static void snd_pcm_iec958_decode(snd_pcm_iec958_t *iec,
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const snd_pcm_channel_area_t *dst_areas,
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snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas,
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snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames)
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{
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#define PUT32_LABELS
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#include "plugin_ops.h"
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#undef PUT32_LABELS
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void *put = put32_labels[iec->getput_idx];
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unsigned int channel;
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for (channel = 0; channel < channels; ++channel) {
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const u_int32_t *src;
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char *dst;
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int src_step, dst_step;
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snd_pcm_uframes_t frames1;
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const snd_pcm_channel_area_t *src_area = &src_areas[channel];
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const snd_pcm_channel_area_t *dst_area = &dst_areas[channel];
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src = snd_pcm_channel_area_addr(src_area, src_offset);
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dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
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src_step = snd_pcm_channel_area_step(src_area) / sizeof(u_int32_t);
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dst_step = snd_pcm_channel_area_step(dst_area);
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frames1 = frames;
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while (frames1-- > 0) {
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int32_t sample = iec958_to_s32(iec, *src);
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goto *put;
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#define PUT32_END after
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#include "plugin_ops.h"
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#undef PUT32_END
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after:
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src += src_step;
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dst += dst_step;
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}
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}
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}
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static void snd_pcm_iec958_encode(snd_pcm_iec958_t *iec,
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const snd_pcm_channel_area_t *dst_areas,
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snd_pcm_uframes_t dst_offset,
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const snd_pcm_channel_area_t *src_areas,
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snd_pcm_uframes_t src_offset,
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unsigned int channels, snd_pcm_uframes_t frames)
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{
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#define GET32_LABELS
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#include "plugin_ops.h"
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#undef GET32_LABELS
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void *get = get32_labels[iec->getput_idx];
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unsigned int channel;
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int32_t sample = 0;
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int counter = iec->counter;
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for (channel = 0; channel < channels; ++channel) {
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const char *src;
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u_int32_t *dst;
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int src_step, dst_step;
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snd_pcm_uframes_t frames1;
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const snd_pcm_channel_area_t *src_area = &src_areas[channel];
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const snd_pcm_channel_area_t *dst_area = &dst_areas[channel];
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src = snd_pcm_channel_area_addr(src_area, src_offset);
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dst = snd_pcm_channel_area_addr(dst_area, dst_offset);
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src_step = snd_pcm_channel_area_step(src_area);
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dst_step = snd_pcm_channel_area_step(dst_area) / sizeof(u_int32_t);
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frames1 = frames;
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iec->counter = counter;
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while (frames1-- > 0) {
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goto *get;
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#define GET32_END after
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#include "plugin_ops.h"
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#undef GET32_END
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after:
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sample = iec958_subframe(iec, sample, channel);
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// fprintf(stderr, "%d:%08x\n", frames1, sample);
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*dst = sample;
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src += src_step;
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dst += dst_step;
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iec->counter++;
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iec->counter %= 192;
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}
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}
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}
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static int snd_pcm_iec958_hw_refine_cprepare(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
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{
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snd_pcm_iec958_t *iec = pcm->private_data;
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int err;
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snd_pcm_access_mask_t access_mask = { SND_PCM_ACCBIT_SHM };
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err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_ACCESS,
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&access_mask);
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if (err < 0)
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return err;
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if (iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_LE ||
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iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_BE) {
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snd_pcm_format_mask_t format_mask = { SND_PCM_FMTBIT_LINEAR };
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err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_FORMAT,
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&format_mask);
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} else {
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snd_pcm_format_mask_t format_mask = {
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{ (1U << SND_PCM_FORMAT_IEC958_SUBFRAME_LE) |
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(1U << SND_PCM_FORMAT_IEC958_SUBFRAME_BE) }
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};
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err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_FORMAT,
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&format_mask);
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}
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if (err < 0)
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return err;
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err = _snd_pcm_hw_params_set_subformat(params, SND_PCM_SUBFORMAT_STD);
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if (err < 0)
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return err;
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params->info &= ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID);
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return 0;
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}
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static int snd_pcm_iec958_hw_refine_sprepare(snd_pcm_t *pcm, snd_pcm_hw_params_t *sparams)
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{
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snd_pcm_iec958_t *iec = pcm->private_data;
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snd_pcm_access_mask_t saccess_mask = { SND_PCM_ACCBIT_MMAP };
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_snd_pcm_hw_params_any(sparams);
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_snd_pcm_hw_param_set_mask(sparams, SND_PCM_HW_PARAM_ACCESS,
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&saccess_mask);
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_snd_pcm_hw_params_set_format(sparams, iec->sformat);
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_snd_pcm_hw_params_set_subformat(sparams, SND_PCM_SUBFORMAT_STD);
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return 0;
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}
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static int snd_pcm_iec958_hw_refine_schange(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params,
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snd_pcm_hw_params_t *sparams)
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{
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int err;
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unsigned int links = (SND_PCM_HW_PARBIT_CHANNELS |
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SND_PCM_HW_PARBIT_RATE |
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SND_PCM_HW_PARBIT_PERIOD_SIZE |
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SND_PCM_HW_PARBIT_BUFFER_SIZE |
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SND_PCM_HW_PARBIT_PERIODS |
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SND_PCM_HW_PARBIT_PERIOD_TIME |
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SND_PCM_HW_PARBIT_BUFFER_TIME |
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SND_PCM_HW_PARBIT_TICK_TIME);
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err = _snd_pcm_hw_params_refine(sparams, links, params);
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if (err < 0)
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return err;
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return 0;
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}
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static int snd_pcm_iec958_hw_refine_cchange(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params,
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snd_pcm_hw_params_t *sparams)
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{
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int err;
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unsigned int links = (SND_PCM_HW_PARBIT_CHANNELS |
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SND_PCM_HW_PARBIT_RATE |
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SND_PCM_HW_PARBIT_PERIOD_SIZE |
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SND_PCM_HW_PARBIT_BUFFER_SIZE |
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SND_PCM_HW_PARBIT_PERIODS |
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SND_PCM_HW_PARBIT_PERIOD_TIME |
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SND_PCM_HW_PARBIT_BUFFER_TIME |
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SND_PCM_HW_PARBIT_TICK_TIME);
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err = _snd_pcm_hw_params_refine(params, links, sparams);
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if (err < 0)
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return err;
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return 0;
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}
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static int snd_pcm_iec958_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
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{
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return snd_pcm_hw_refine_slave(pcm, params,
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snd_pcm_iec958_hw_refine_cprepare,
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snd_pcm_iec958_hw_refine_cchange,
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snd_pcm_iec958_hw_refine_sprepare,
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snd_pcm_iec958_hw_refine_schange,
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snd_pcm_plugin_hw_refine_slave);
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}
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static int snd_pcm_iec958_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params)
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{
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snd_pcm_iec958_t *iec = pcm->private_data;
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snd_pcm_format_t format;
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int err = snd_pcm_hw_params_slave(pcm, params,
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snd_pcm_iec958_hw_refine_cchange,
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snd_pcm_iec958_hw_refine_sprepare,
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snd_pcm_iec958_hw_refine_schange,
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snd_pcm_plugin_hw_params_slave);
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if (err < 0)
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return err;
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err = INTERNAL(snd_pcm_hw_params_get_format)(params, &format);
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if (err < 0)
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return err;
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iec->format = format;
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if (pcm->stream == SND_PCM_STREAM_PLAYBACK) {
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if (iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_LE ||
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iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_BE) {
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iec->getput_idx = snd_pcm_linear_get_index(format, SND_PCM_FORMAT_S32);
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iec->func = snd_pcm_iec958_encode;
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iec->byteswap = iec->sformat != SND_PCM_FORMAT_IEC958_SUBFRAME;
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} else {
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iec->getput_idx = snd_pcm_linear_put_index(SND_PCM_FORMAT_S32, iec->sformat);
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iec->func = snd_pcm_iec958_decode;
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iec->byteswap = format != SND_PCM_FORMAT_IEC958_SUBFRAME;
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}
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} else {
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if (iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_LE ||
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iec->sformat == SND_PCM_FORMAT_IEC958_SUBFRAME_BE) {
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iec->getput_idx = snd_pcm_linear_put_index(SND_PCM_FORMAT_S32, format);
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iec->func = snd_pcm_iec958_decode;
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iec->byteswap = iec->sformat != SND_PCM_FORMAT_IEC958_SUBFRAME;
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} else {
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iec->getput_idx = snd_pcm_linear_get_index(iec->sformat, SND_PCM_FORMAT_S32);
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iec->func = snd_pcm_iec958_encode;
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iec->byteswap = format != SND_PCM_FORMAT_IEC958_SUBFRAME;
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}
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}
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/* FIXME: needs to adjust status_bits according to the format
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* and sample rate
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*/
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return 0;
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}
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static snd_pcm_uframes_t
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snd_pcm_iec958_write_areas(snd_pcm_t *pcm,
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const snd_pcm_channel_area_t *areas,
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snd_pcm_uframes_t offset,
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snd_pcm_uframes_t size,
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const snd_pcm_channel_area_t *slave_areas,
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snd_pcm_uframes_t slave_offset,
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snd_pcm_uframes_t *slave_sizep)
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{
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snd_pcm_iec958_t *iec = pcm->private_data;
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if (size > *slave_sizep)
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size = *slave_sizep;
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iec->func(iec, slave_areas, slave_offset,
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areas, offset,
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pcm->channels, size);
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*slave_sizep = size;
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return size;
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}
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static snd_pcm_uframes_t
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snd_pcm_iec958_read_areas(snd_pcm_t *pcm,
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const snd_pcm_channel_area_t *areas,
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snd_pcm_uframes_t offset,
|
||||
snd_pcm_uframes_t size,
|
||||
const snd_pcm_channel_area_t *slave_areas,
|
||||
snd_pcm_uframes_t slave_offset,
|
||||
snd_pcm_uframes_t *slave_sizep)
|
||||
{
|
||||
snd_pcm_iec958_t *iec = pcm->private_data;
|
||||
if (size > *slave_sizep)
|
||||
size = *slave_sizep;
|
||||
iec->func(iec, areas, offset,
|
||||
slave_areas, slave_offset,
|
||||
pcm->channels, size);
|
||||
*slave_sizep = size;
|
||||
return size;
|
||||
}
|
||||
|
||||
static int snd_pcm_iec958_init(snd_pcm_t *pcm)
|
||||
{
|
||||
snd_pcm_iec958_t *iec = pcm->private_data;
|
||||
iec->counter = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void snd_pcm_iec958_dump(snd_pcm_t *pcm, snd_output_t *out)
|
||||
{
|
||||
snd_pcm_iec958_t *iec = pcm->private_data;
|
||||
snd_output_printf(out, "IEC958 subframe conversion PCM (%s)\n",
|
||||
snd_pcm_format_name(iec->sformat));
|
||||
if (pcm->setup) {
|
||||
snd_output_printf(out, "Its setup is:\n");
|
||||
snd_pcm_dump_setup(pcm, out);
|
||||
}
|
||||
snd_output_printf(out, "Slave: ");
|
||||
snd_pcm_dump(iec->plug.slave, out);
|
||||
}
|
||||
|
||||
static snd_pcm_ops_t snd_pcm_iec958_ops = {
|
||||
.close = snd_pcm_plugin_close,
|
||||
.info = snd_pcm_plugin_info,
|
||||
.hw_refine = snd_pcm_iec958_hw_refine,
|
||||
.hw_params = snd_pcm_iec958_hw_params,
|
||||
.hw_free = snd_pcm_plugin_hw_free,
|
||||
.sw_params = snd_pcm_plugin_sw_params,
|
||||
.channel_info = snd_pcm_plugin_channel_info,
|
||||
.dump = snd_pcm_iec958_dump,
|
||||
.nonblock = snd_pcm_plugin_nonblock,
|
||||
.async = snd_pcm_plugin_async,
|
||||
.poll_revents = snd_pcm_plugin_poll_revents,
|
||||
.mmap = snd_pcm_plugin_mmap,
|
||||
.munmap = snd_pcm_plugin_munmap,
|
||||
};
|
||||
|
||||
/**
|
||||
* \brief Creates a new IEC958 subframe conversion PCM
|
||||
* \param pcmp Returns created PCM handle
|
||||
* \param name Name of PCM
|
||||
* \param sformat Slave (destination) format
|
||||
* \param slave Slave PCM handle
|
||||
* \param close_slave When set, the slave PCM handle is closed with copy PCM
|
||||
* \retval zero on success otherwise a negative error code
|
||||
* \warning Using of this function might be dangerous in the sense
|
||||
* of compatibility reasons. The prototype might be freely
|
||||
* changed in future.
|
||||
*/
|
||||
int snd_pcm_iec958_open(snd_pcm_t **pcmp, const char *name, snd_pcm_format_t sformat, snd_pcm_t *slave, int close_slave, const unsigned char *status_bits)
|
||||
{
|
||||
snd_pcm_t *pcm;
|
||||
snd_pcm_iec958_t *iec;
|
||||
int err;
|
||||
static unsigned char default_status_bits[] = {
|
||||
IEC958_AES0_CON_EMPHASIS_NONE,
|
||||
IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER,
|
||||
0,
|
||||
IEC958_AES3_CON_FS_48000
|
||||
};
|
||||
|
||||
assert(pcmp && slave);
|
||||
if (snd_pcm_format_linear(sformat) != 1 &&
|
||||
sformat != SND_PCM_FORMAT_IEC958_SUBFRAME_LE &&
|
||||
sformat != SND_PCM_FORMAT_IEC958_SUBFRAME_BE)
|
||||
return -EINVAL;
|
||||
iec = calloc(1, sizeof(snd_pcm_iec958_t));
|
||||
if (!iec) {
|
||||
return -ENOMEM;
|
||||
}
|
||||
snd_pcm_plugin_init(&iec->plug);
|
||||
iec->sformat = sformat;
|
||||
iec->plug.read = snd_pcm_iec958_read_areas;
|
||||
iec->plug.write = snd_pcm_iec958_write_areas;
|
||||
iec->plug.init = snd_pcm_iec958_init;
|
||||
iec->plug.undo_read = snd_pcm_plugin_undo_read_generic;
|
||||
iec->plug.undo_write = snd_pcm_plugin_undo_write_generic;
|
||||
iec->plug.slave = slave;
|
||||
iec->plug.close_slave = close_slave;
|
||||
|
||||
if (status_bits)
|
||||
memcpy(iec->status, status_bits, sizeof(iec->status));
|
||||
else
|
||||
memcpy(iec->status, default_status_bits, sizeof(default_status_bits));
|
||||
|
||||
err = snd_pcm_new(&pcm, SND_PCM_TYPE_IEC958, name, slave->stream, slave->mode);
|
||||
if (err < 0) {
|
||||
free(iec);
|
||||
return err;
|
||||
}
|
||||
pcm->ops = &snd_pcm_iec958_ops;
|
||||
pcm->fast_ops = &snd_pcm_plugin_fast_ops;
|
||||
pcm->private_data = iec;
|
||||
pcm->poll_fd = slave->poll_fd;
|
||||
pcm->poll_events = slave->poll_events;
|
||||
snd_pcm_set_hw_ptr(pcm, &iec->plug.hw_ptr, -1, 0);
|
||||
snd_pcm_set_appl_ptr(pcm, &iec->plug.appl_ptr, -1, 0);
|
||||
*pcmp = pcm;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*! \page pcm_plugins
|
||||
|
||||
\section pcm_plugins_iec958 Plugin: IEC958
|
||||
|
||||
This plugin converts 32bit IEC958 subframe samples to linear, or linear to
|
||||
32bit IEC958 subframe samples.
|
||||
|
||||
\code
|
||||
pcm.name {
|
||||
type iec958 # IEC958 subframe conversion PCM
|
||||
slave STR # Slave name
|
||||
# or
|
||||
slave { # Slave definition
|
||||
pcm STR # Slave PCM name
|
||||
# or
|
||||
pcm { } # Slave PCM definition
|
||||
}
|
||||
[status status-bytes] # IEC958 status bits (given in byte array)
|
||||
}
|
||||
\endcode
|
||||
|
||||
\subsection pcm_plugins_iec958_funcref Function reference
|
||||
|
||||
<UL>
|
||||
<LI>snd_pcm_iec958_open()
|
||||
<LI>_snd_pcm_iec958_open()
|
||||
</UL>
|
||||
|
||||
*/
|
||||
|
||||
/**
|
||||
* \brief Creates a new IEC958 subframe conversion PCM
|
||||
* \param pcmp Returns created PCM handle
|
||||
* \param name Name of PCM
|
||||
* \param root Root configuration node
|
||||
* \param conf Configuration node with copy PCM description
|
||||
* \param stream Stream type
|
||||
* \param mode Stream mode
|
||||
* \retval zero on success otherwise a negative error code
|
||||
* \warning Using of this function might be dangerous in the sense
|
||||
* of compatibility reasons. The prototype might be freely
|
||||
* changed in future.
|
||||
*/
|
||||
int _snd_pcm_iec958_open(snd_pcm_t **pcmp, const char *name,
|
||||
snd_config_t *root, snd_config_t *conf,
|
||||
snd_pcm_stream_t stream, int mode)
|
||||
{
|
||||
snd_config_iterator_t i, next;
|
||||
int err;
|
||||
snd_pcm_t *spcm;
|
||||
snd_config_t *slave = NULL, *sconf;
|
||||
snd_config_t *status = NULL;
|
||||
snd_pcm_format_t sformat;
|
||||
unsigned char status_bits[24];
|
||||
|
||||
snd_config_for_each(i, next, conf) {
|
||||
snd_config_t *n = snd_config_iterator_entry(i);
|
||||
const char *id;
|
||||
if (snd_config_get_id(n, &id) < 0)
|
||||
continue;
|
||||
if (snd_pcm_conf_generic_id(id))
|
||||
continue;
|
||||
if (strcmp(id, "slave") == 0) {
|
||||
slave = n;
|
||||
continue;
|
||||
}
|
||||
if (strcmp(id, "status") == 0) {
|
||||
if (snd_config_get_type(n) != SND_CONFIG_TYPE_COMPOUND) {
|
||||
SNDERR("Invalid type for %s", id);
|
||||
return -EINVAL;
|
||||
}
|
||||
status = n;
|
||||
continue;
|
||||
}
|
||||
SNDERR("Unknown field %s", id);
|
||||
return -EINVAL;
|
||||
}
|
||||
memset(status_bits, 0, sizeof(status_bits));
|
||||
if (status) {
|
||||
snd_config_iterator_t i, inext;
|
||||
int bytes = 0;
|
||||
snd_config_for_each(i, inext, status) {
|
||||
long val;
|
||||
snd_config_t *n = snd_config_iterator_entry(i);
|
||||
if (snd_config_get_type(n) != SND_CONFIG_TYPE_INTEGER) {
|
||||
SNDERR("invalid IEC958 status bits");
|
||||
return -EINVAL;
|
||||
}
|
||||
err = snd_config_get_integer(n, &val);
|
||||
if (err < 0) {
|
||||
SNDERR("invalid IEC958 status bits");
|
||||
return err;
|
||||
}
|
||||
status_bits[bytes] = val;
|
||||
bytes++;
|
||||
if (bytes >= (int)sizeof(status_bits))
|
||||
break;
|
||||
}
|
||||
// fprintf(stderr, "STATUS bits: %02x %02x %02x %02x\n", status_bits[0], status_bits[1], status_bits[2], status_bits[3]);
|
||||
}
|
||||
if (!slave) {
|
||||
SNDERR("slave is not defined");
|
||||
return -EINVAL;
|
||||
}
|
||||
err = snd_pcm_slave_conf(root, slave, &sconf, 1,
|
||||
SND_PCM_HW_PARAM_FORMAT, SCONF_MANDATORY, &sformat);
|
||||
if (err < 0)
|
||||
return err;
|
||||
if (snd_pcm_format_linear(sformat) != 1 &&
|
||||
sformat != SND_PCM_FORMAT_IEC958_SUBFRAME_LE &&
|
||||
sformat != SND_PCM_FORMAT_IEC958_SUBFRAME_BE) {
|
||||
snd_config_delete(sconf);
|
||||
SNDERR("invalid slave format");
|
||||
return -EINVAL;
|
||||
}
|
||||
err = snd_pcm_open_slave(&spcm, root, sconf, stream, mode);
|
||||
snd_config_delete(sconf);
|
||||
if (err < 0)
|
||||
return err;
|
||||
err = snd_pcm_iec958_open(pcmp, name, sformat, spcm, 1, status ? status_bits : NULL);
|
||||
if (err < 0)
|
||||
snd_pcm_close(spcm);
|
||||
return err;
|
||||
}
|
||||
#ifndef DOC_HIDDEN
|
||||
SND_DLSYM_BUILD_VERSION(_snd_pcm_iec958_open, SND_PCM_DLSYM_VERSION);
|
||||
#endif
|
||||
|
|
@ -44,6 +44,7 @@ extern const char *_snd_module_pcm_dmix;
|
|||
extern const char *_snd_module_pcm_dsnoop;
|
||||
extern const char *_snd_module_pcm_dshare;
|
||||
extern const char *_snd_module_pcm_asym;
|
||||
extern const char *_snd_module_pcm_iec958;
|
||||
|
||||
static const char **snd_pcm_open_objects[] = {
|
||||
&_snd_module_pcm_adpcm,
|
||||
|
|
@ -67,7 +68,8 @@ static const char **snd_pcm_open_objects[] = {
|
|||
&_snd_module_pcm_dmix,
|
||||
&_snd_module_pcm_dsnoop,
|
||||
&_snd_module_pcm_dshare,
|
||||
&_snd_module_pcm_asym
|
||||
&_snd_module_pcm_asym,
|
||||
&_snd_module_pcm_iec958
|
||||
};
|
||||
|
||||
void *snd_pcm_open_symbols(void)
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue