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-rw-r--r--alsa-lib/src/control/tlv.c429
1 files changed, 0 insertions, 429 deletions
diff --git a/alsa-lib/src/control/tlv.c b/alsa-lib/src/control/tlv.c
deleted file mode 100644
index 0006a87..0000000
--- a/alsa-lib/src/control/tlv.c
+++ /dev/null
@@ -1,429 +0,0 @@
-/**
- * \file control/tlv.c
- * \brief dB conversion functions from control TLV information
- * \author Takashi Iwai <tiwai@suse.de>
- * \date 2007
- */
-/*
- * Control Interface - dB conversion functions from control TLV information
- *
- * Copyright (c) 2007 Takashi Iwai <tiwai@suse.de>
- *
- *
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as
- * published by the Free Software Foundation; either version 2.1 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#ifndef HAVE_SOFT_FLOAT
-#include <math.h>
-#endif
-#include "control_local.h"
-
-#ifndef DOC_HIDDEN
-/* convert to index of integer array */
-#define int_index(size) (((size) + sizeof(int) - 1) / sizeof(int))
-/* max size of a TLV entry for dB information (including compound one) */
-#define MAX_TLV_RANGE_SIZE 256
-#endif
-
-/**
- * \brief Parse TLV stream and retrieve dB information
- * \param tlv the TLV source
- * \param tlv_size the byte size of TLV source
- * \param db_tlvp the pointer stored the dB TLV information
- * \return the byte size of dB TLV information if found in the given
- * TLV source, or a negative error code.
- *
- * This function parses the given TLV source and stores the TLV start
- * point if the TLV information regarding dB conversion is found.
- * The stored TLV pointer can be passed to the convesion functions
- * #snd_tlv_convert_to_dB(), #snd_tlv_convert_from_dB() and
- * #snd_tlv_get_dB_range().
- */
-int snd_tlv_parse_dB_info(unsigned int *tlv,
- unsigned int tlv_size,
- unsigned int **db_tlvp)
-{
- unsigned int type;
- unsigned int size;
- int err;
-
- *db_tlvp = NULL;
- type = tlv[0];
- size = tlv[1];
- tlv_size -= 2 * sizeof(int);
- if (size > tlv_size) {
- SNDERR("TLV size error");
- return -EINVAL;
- }
- switch (type) {
- case SND_CTL_TLVT_CONTAINER:
- size = int_index(size) * sizeof(int);
- tlv += 2;
- while (size > 0) {
- unsigned int len;
- err = snd_tlv_parse_dB_info(tlv, size, db_tlvp);
- if (err < 0)
- return err; /* error */
- if (err > 0)
- return err; /* found */
- len = int_index(tlv[1]) + 2;
- size -= len * sizeof(int);
- tlv += len;
- }
- break;
- case SND_CTL_TLVT_DB_SCALE:
-#ifndef HAVE_SOFT_FLOAT
- case SND_CTL_TLVT_DB_LINEAR:
-#endif
- case SND_CTL_TLVT_DB_RANGE: {
- unsigned int minsize;
- if (type == SND_CTL_TLVT_DB_RANGE)
- minsize = 4 * sizeof(int);
- else
- minsize = 2 * sizeof(int);
- if (size < minsize) {
- SNDERR("Invalid dB_scale TLV size");
- return -EINVAL;
- }
- if (size > MAX_TLV_RANGE_SIZE) {
- SNDERR("Too big dB_scale TLV size: %d", size);
- return -EINVAL;
- }
- *db_tlvp = tlv;
- return size + sizeof(int) * 2;
- }
- default:
- break;
- }
- return -EINVAL; /* not found */
-}
-
-/**
- * \brief Get the dB min/max values
- * \param tlv the TLV source returned by #snd_tlv_parse_dB_info()
- * \param rangemin the minimum value of the raw volume
- * \param rangemax the maximum value of the raw volume
- * \param min the pointer to store the minimum dB value (in 0.01dB unit)
- * \param max the pointer to store the maximum dB value (in 0.01dB unit)
- * \return 0 if successful, or a negative error code
- */
-int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
- long *min, long *max)
-{
- int err;
-
- switch (tlv[0]) {
- case SND_CTL_TLVT_DB_RANGE: {
- unsigned int pos, len;
- len = int_index(tlv[1]);
- if (len > MAX_TLV_RANGE_SIZE)
- return -EINVAL;
- pos = 2;
- while (pos + 4 <= len) {
- long rmin, rmax;
- rangemin = (int)tlv[pos];
- rangemax = (int)tlv[pos + 1];
- err = snd_tlv_get_dB_range(tlv + pos + 2,
- rangemin, rangemax,
- &rmin, &rmax);
- if (err < 0)
- return err;
- if (pos > 2) {
- if (rmin < *min)
- *min = rmin;
- if (rmax > *max)
- *max = rmax;
- } else {
- *min = rmin;
- *max = rmax;
- }
- pos += int_index(tlv[pos + 3]) + 4;
- }
- return 0;
- }
- case SND_CTL_TLVT_DB_SCALE: {
- int step;
- *min = (int)tlv[2];
- step = (tlv[3] & 0xffff);
- *max = *min + (long)(step * (rangemax - rangemin));
- return 0;
- }
- case SND_CTL_TLVT_DB_LINEAR:
- *min = (int)tlv[2];
- *max = (int)tlv[3];
- return 0;
- }
- return -EINVAL;
-}
-
-/**
- * \brief Convert the given raw volume value to a dB gain
- * \param tlv the TLV source returned by #snd_tlv_parse_dB_info()
- * \param rangemin the minimum value of the raw volume
- * \param rangemax the maximum value of the raw volume
- * \param volume the raw volume value to convert
- * \param db_gain the dB gain (in 0.01dB unit)
- * \return 0 if successful, or a negative error code
- */
-int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
- long volume, long *db_gain)
-{
- switch (tlv[0]) {
- case SND_CTL_TLVT_DB_RANGE: {
- unsigned int pos, len;
- len = int_index(tlv[1]);
- if (len > MAX_TLV_RANGE_SIZE)
- return -EINVAL;
- pos = 2;
- while (pos + 4 <= len) {
- rangemin = (int)tlv[pos];
- rangemax = (int)tlv[pos + 1];
- if (volume >= rangemin && volume <= rangemax)
- return snd_tlv_convert_to_dB(tlv + pos + 2,
- rangemin, rangemax,
- volume, db_gain);
- pos += int_index(tlv[pos + 3]) + 4;
- }
- return -EINVAL;
- }
- case SND_CTL_TLVT_DB_SCALE: {
- int min, step, mute;
- min = tlv[2];
- step = (tlv[3] & 0xffff);
- mute = (tlv[3] >> 16) & 1;
- if (mute && volume == rangemin)
- *db_gain = SND_CTL_TLV_DB_GAIN_MUTE;
- else
- *db_gain = (volume - rangemin) * step + min;
- return 0;
- }
-#ifndef HAVE_SOFT_FLOAT
- case SND_CTL_TLVT_DB_LINEAR: {
- int mindb = tlv[2];
- int maxdb = tlv[3];
- if (volume <= rangemin || rangemax <= rangemin)
- *db_gain = mindb;
- else if (volume >= rangemax)
- *db_gain = maxdb;
- else {
- double val = (double)(volume - rangemin) /
- (double)(rangemax - rangemin);
- if (mindb <= SND_CTL_TLV_DB_GAIN_MUTE)
- *db_gain = (long)(100.0 * 20.0 * log10(val)) +
- maxdb;
- else {
- /* FIXME: precalculate and cache these values */
- double lmin = pow(10.0, mindb/2000.0);
- double lmax = pow(10.0, maxdb/2000.0);
- val = (lmax - lmin) * val + lmin;
- *db_gain = (long)(100.0 * 20.0 * log10(val));
- }
- }
- return 0;
- }
-#endif
- }
- return -EINVAL;
-}
-
-/**
- * \brief Convert from dB gain to the corresponding raw value
- * \param tlv the TLV source returned by #snd_tlv_parse_dB_info()
- * \param rangemin the minimum value of the raw volume
- * \param rangemax the maximum value of the raw volume
- * \param db_gain the dB gain to convert (in 0.01dB unit)
- * \param value the pointer to store the converted raw volume value
- * \param xdir the direction for round-up. The value is round up
- * when this is positive.
- * \return 0 if successful, or a negative error code
- */
-int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
- long db_gain, long *value, int xdir)
-{
- switch (tlv[0]) {
- case SND_CTL_TLVT_DB_RANGE: {
- unsigned int pos, len;
- len = int_index(tlv[1]);
- if (len > MAX_TLV_RANGE_SIZE)
- return -EINVAL;
- pos = 2;
- while (pos + 4 <= len) {
- long dbmin, dbmax;
- rangemin = (int)tlv[pos];
- rangemax = (int)tlv[pos + 1];
- if (!snd_tlv_get_dB_range(tlv + pos + 2,
- rangemin, rangemax,
- &dbmin, &dbmax) &&
- db_gain >= dbmin && db_gain <= dbmax)
- return snd_tlv_convert_from_dB(tlv + pos + 2,
- rangemin, rangemax,
- db_gain, value, xdir);
- pos += int_index(tlv[pos + 3]) + 4;
- }
- return -EINVAL;
- }
- case SND_CTL_TLVT_DB_SCALE: {
- int min, step, max;
- min = tlv[2];
- step = (tlv[3] & 0xffff);
- max = min + (int)(step * (rangemax - rangemin));
- if (db_gain <= min)
- *value = rangemin;
- else if (db_gain >= max)
- *value = rangemax;
- else {
- long v = (db_gain - min) * (rangemax - rangemin);
- if (xdir > 0)
- v += (max - min) - 1;
- v = v / (max - min) + rangemin;
- *value = v;
- }
- return 0;
- }
-#ifndef HAVE_SOFT_FLOAT
- case SND_CTL_TLVT_DB_LINEAR: {
- int min, max;
- min = tlv[2];
- max = tlv[3];
- if (db_gain <= min)
- *value = rangemin;
- else if (db_gain >= max)
- *value = rangemax;
- else {
- /* FIXME: precalculate and cache vmin and vmax */
- double vmin, vmax, v;
- vmin = (min <= SND_CTL_TLV_DB_GAIN_MUTE) ? 0.0 :
- pow(10.0, (double)min / 2000.0);
- vmax = !max ? 1.0 : pow(10.0, (double)max / 2000.0);
- v = pow(10.0, (double)db_gain / 2000.0);
- v = (v - vmin) * (rangemax - rangemin) / (vmax - vmin);
- if (xdir > 0)
- v = ceil(v);
- *value = (long)v + rangemin;
- }
- return 0;
- }
-#endif
- default:
- break;
- }
- return -EINVAL;
-}
-
-#ifndef DOC_HIDDEN
-#define TEMP_TLV_SIZE 4096
-struct tlv_info {
- long minval, maxval;
- unsigned int *tlv;
- unsigned int buf[TEMP_TLV_SIZE];
-};
-#endif
-
-static int get_tlv_info(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
- struct tlv_info *rec)
-{
- snd_ctl_elem_info_t *info;
- int err;
-
- snd_ctl_elem_info_alloca(&info);
- snd_ctl_elem_info_set_id(info, id);
- err = snd_ctl_elem_info(ctl, info);
- if (err < 0)
- return err;
- if (!snd_ctl_elem_info_is_tlv_readable(info))
- return -EINVAL;
- if (snd_ctl_elem_info_get_type(info) != SND_CTL_ELEM_TYPE_INTEGER)
- return -EINVAL;
- rec->minval = snd_ctl_elem_info_get_min(info);
- rec->maxval = snd_ctl_elem_info_get_max(info);
- err = snd_ctl_elem_tlv_read(ctl, id, rec->buf, sizeof(rec->buf));
- if (err < 0)
- return err;
- err = snd_tlv_parse_dB_info(rec->buf, sizeof(rec->buf), &rec->tlv);
- if (err < 0)
- return err;
- return 0;
-}
-
-/**
- * \brief Get the dB min/max values on the given control element
- * \param ctl the control handler
- * \param id the element id
- * \param volume the raw volume value to convert
- * \param min the pointer to store the minimum dB value (in 0.01dB unit)
- * \param max the pointer to store the maximum dB value (in 0.01dB unit)
- * \return 0 if successful, or a negative error code
- */
-int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
- long *min, long *max)
-{
- struct tlv_info info;
- int err;
-
- err = get_tlv_info(ctl, id, &info);
- if (err < 0)
- return err;
- return snd_tlv_get_dB_range(info.tlv, info.minval, info.maxval,
- min, max);
-}
-
-/**
- * \brief Convert the volume value to dB on the given control element
- * \param ctl the control handler
- * \param id the element id
- * \param volume the raw volume value to convert
- * \param db_gain the dB gain (in 0.01dB unit)
- * \return 0 if successful, or a negative error code
- */
-int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
- long volume, long *db_gain)
-{
- struct tlv_info info;
- int err;
-
- err = get_tlv_info(ctl, id, &info);
- if (err < 0)
- return err;
- return snd_tlv_convert_to_dB(info.tlv, info.minval, info.maxval,
- volume, db_gain);
-}
-
-/**
- * \brief Convert from dB gain to the raw volume value on the given control element
- * \param ctl the control handler
- * \param id the element id
- * \param db_gain the dB gain to convert (in 0.01dB unit)
- * \param value the pointer to store the converted raw volume value
- * \param xdir the direction for round-up. The value is round up
- * when this is positive.
- * \return 0 if successful, or a negative error code
- */
-int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
- long db_gain, long *value, int xdir)
-{
- struct tlv_info info;
- int err;
-
- err = get_tlv_info(ctl, id, &info);
- if (err < 0)
- return err;
- return snd_tlv_convert_from_dB(info.tlv, info.minval, info.maxval,
- db_gain, value, xdir);
-}
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