Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/sound/core/pcm_misc.c b/sound/core/pcm_misc.c
new file mode 100644
index 0000000..422b8db
--- /dev/null
+++ b/sound/core/pcm_misc.c
@@ -0,0 +1,481 @@
+/*
+ * PCM Interface - misc routines
+ * Copyright (c) 1998 by Jaroslav Kysela <perex@suse.cz>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library 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 <sound/driver.h>
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#define SND_PCM_FORMAT_UNKNOWN (-1)
+
+/* NOTE: "signed" prefix must be given below since the default char is
+ * unsigned on some architectures!
+ */
+struct pcm_format_data {
+ unsigned char width; /* bit width */
+ unsigned char phys; /* physical bit width */
+ signed char le; /* 0 = big-endian, 1 = little-endian, -1 = others */
+ signed char signd; /* 0 = unsigned, 1 = signed, -1 = others */
+ unsigned char silence[8]; /* silence data to fill */
+};
+
+static struct pcm_format_data pcm_formats[SNDRV_PCM_FORMAT_LAST+1] = {
+ [SNDRV_PCM_FORMAT_S8] = {
+ .width = 8, .phys = 8, .le = -1, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_U8] = {
+ .width = 8, .phys = 8, .le = -1, .signd = 0,
+ .silence = { 0x80 },
+ },
+ [SNDRV_PCM_FORMAT_S16_LE] = {
+ .width = 16, .phys = 16, .le = 1, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_S16_BE] = {
+ .width = 16, .phys = 16, .le = 0, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_U16_LE] = {
+ .width = 16, .phys = 16, .le = 1, .signd = 0,
+ .silence = { 0x00, 0x80 },
+ },
+ [SNDRV_PCM_FORMAT_U16_BE] = {
+ .width = 16, .phys = 16, .le = 0, .signd = 0,
+ .silence = { 0x80, 0x00 },
+ },
+ [SNDRV_PCM_FORMAT_S24_LE] = {
+ .width = 24, .phys = 32, .le = 1, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_S24_BE] = {
+ .width = 24, .phys = 32, .le = 0, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_U24_LE] = {
+ .width = 24, .phys = 32, .le = 1, .signd = 0,
+ .silence = { 0x00, 0x00, 0x80 },
+ },
+ [SNDRV_PCM_FORMAT_U24_BE] = {
+ .width = 24, .phys = 32, .le = 0, .signd = 0,
+ .silence = { 0x80, 0x00, 0x00 },
+ },
+ [SNDRV_PCM_FORMAT_S32_LE] = {
+ .width = 32, .phys = 32, .le = 1, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_S32_BE] = {
+ .width = 32, .phys = 32, .le = 0, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_U32_LE] = {
+ .width = 32, .phys = 32, .le = 1, .signd = 0,
+ .silence = { 0x00, 0x00, 0x00, 0x80 },
+ },
+ [SNDRV_PCM_FORMAT_U32_BE] = {
+ .width = 32, .phys = 32, .le = 0, .signd = 0,
+ .silence = { 0x80, 0x00, 0x00, 0x00 },
+ },
+ [SNDRV_PCM_FORMAT_FLOAT_LE] = {
+ .width = 32, .phys = 32, .le = 1, .signd = -1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_FLOAT_BE] = {
+ .width = 32, .phys = 32, .le = 0, .signd = -1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_FLOAT64_LE] = {
+ .width = 64, .phys = 64, .le = 1, .signd = -1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_FLOAT64_BE] = {
+ .width = 64, .phys = 64, .le = 0, .signd = -1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE] = {
+ .width = 32, .phys = 32, .le = 1, .signd = -1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE] = {
+ .width = 32, .phys = 32, .le = 0, .signd = -1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_MU_LAW] = {
+ .width = 8, .phys = 8, .le = -1, .signd = -1,
+ .silence = { 0x7f },
+ },
+ [SNDRV_PCM_FORMAT_A_LAW] = {
+ .width = 8, .phys = 8, .le = -1, .signd = -1,
+ .silence = { 0x55 },
+ },
+ [SNDRV_PCM_FORMAT_IMA_ADPCM] = {
+ .width = 4, .phys = 4, .le = -1, .signd = -1,
+ .silence = {},
+ },
+ /* FIXME: the following three formats are not defined properly yet */
+ [SNDRV_PCM_FORMAT_MPEG] = {
+ .le = -1, .signd = -1,
+ },
+ [SNDRV_PCM_FORMAT_GSM] = {
+ .le = -1, .signd = -1,
+ },
+ [SNDRV_PCM_FORMAT_SPECIAL] = {
+ .le = -1, .signd = -1,
+ },
+ [SNDRV_PCM_FORMAT_S24_3LE] = {
+ .width = 24, .phys = 24, .le = 1, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_S24_3BE] = {
+ .width = 24, .phys = 24, .le = 0, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_U24_3LE] = {
+ .width = 24, .phys = 24, .le = 1, .signd = 0,
+ .silence = { 0x00, 0x00, 0x80 },
+ },
+ [SNDRV_PCM_FORMAT_U24_3BE] = {
+ .width = 24, .phys = 24, .le = 0, .signd = 0,
+ .silence = { 0x80, 0x00, 0x00 },
+ },
+ [SNDRV_PCM_FORMAT_S20_3LE] = {
+ .width = 20, .phys = 24, .le = 1, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_S20_3BE] = {
+ .width = 20, .phys = 24, .le = 0, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_U20_3LE] = {
+ .width = 20, .phys = 24, .le = 1, .signd = 0,
+ .silence = { 0x00, 0x00, 0x08 },
+ },
+ [SNDRV_PCM_FORMAT_U20_3BE] = {
+ .width = 20, .phys = 24, .le = 0, .signd = 0,
+ .silence = { 0x08, 0x00, 0x00 },
+ },
+ [SNDRV_PCM_FORMAT_S18_3LE] = {
+ .width = 18, .phys = 24, .le = 1, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_S18_3BE] = {
+ .width = 18, .phys = 24, .le = 0, .signd = 1,
+ .silence = {},
+ },
+ [SNDRV_PCM_FORMAT_U18_3LE] = {
+ .width = 18, .phys = 24, .le = 1, .signd = 0,
+ .silence = { 0x00, 0x00, 0x02 },
+ },
+ [SNDRV_PCM_FORMAT_U18_3BE] = {
+ .width = 18, .phys = 24, .le = 0, .signd = 0,
+ .silence = { 0x02, 0x00, 0x00 },
+ },
+};
+
+
+/**
+ * snd_pcm_format_signed - Check the PCM format is signed linear
+ * @format: the format to check
+ *
+ * Returns 1 if the given PCM format is signed linear, 0 if unsigned
+ * linear, and a negative error code for non-linear formats.
+ */
+int snd_pcm_format_signed(snd_pcm_format_t format)
+{
+ int val;
+ if (format < 0 || format > SNDRV_PCM_FORMAT_LAST)
+ return -EINVAL;
+ if ((val = pcm_formats[format].signd) < 0)
+ return -EINVAL;
+ return val;
+}
+
+/**
+ * snd_pcm_format_unsigned - Check the PCM format is unsigned linear
+ * @format: the format to check
+ *
+ * Returns 1 if the given PCM format is unsigned linear, 0 if signed
+ * linear, and a negative error code for non-linear formats.
+ */
+int snd_pcm_format_unsigned(snd_pcm_format_t format)
+{
+ int val;
+
+ val = snd_pcm_format_signed(format);
+ if (val < 0)
+ return val;
+ return !val;
+}
+
+/**
+ * snd_pcm_format_linear - Check the PCM format is linear
+ * @format: the format to check
+ *
+ * Returns 1 if the given PCM format is linear, 0 if not.
+ */
+int snd_pcm_format_linear(snd_pcm_format_t format)
+{
+ return snd_pcm_format_signed(format) >= 0;
+}
+
+/**
+ * snd_pcm_format_little_endian - Check the PCM format is little-endian
+ * @format: the format to check
+ *
+ * Returns 1 if the given PCM format is little-endian, 0 if
+ * big-endian, or a negative error code if endian not specified.
+ */
+int snd_pcm_format_little_endian(snd_pcm_format_t format)
+{
+ int val;
+ if (format < 0 || format > SNDRV_PCM_FORMAT_LAST)
+ return -EINVAL;
+ if ((val = pcm_formats[format].le) < 0)
+ return -EINVAL;
+ return val;
+}
+
+/**
+ * snd_pcm_format_big_endian - Check the PCM format is big-endian
+ * @format: the format to check
+ *
+ * Returns 1 if the given PCM format is big-endian, 0 if
+ * little-endian, or a negative error code if endian not specified.
+ */
+int snd_pcm_format_big_endian(snd_pcm_format_t format)
+{
+ int val;
+
+ val = snd_pcm_format_little_endian(format);
+ if (val < 0)
+ return val;
+ return !val;
+}
+
+/**
+ * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
+ * @format: the format to check
+ *
+ * Returns 1 if the given PCM format is CPU-endian, 0 if
+ * opposite, or a negative error code if endian not specified.
+ */
+int snd_pcm_format_cpu_endian(snd_pcm_format_t format)
+{
+#ifdef SNDRV_LITTLE_ENDIAN
+ return snd_pcm_format_little_endian(format);
+#else
+ return snd_pcm_format_big_endian(format);
+#endif
+}
+
+/**
+ * snd_pcm_format_width - return the bit-width of the format
+ * @format: the format to check
+ *
+ * Returns the bit-width of the format, or a negative error code
+ * if unknown format.
+ */
+int snd_pcm_format_width(snd_pcm_format_t format)
+{
+ int val;
+ if (format < 0 || format > SNDRV_PCM_FORMAT_LAST)
+ return -EINVAL;
+ if ((val = pcm_formats[format].width) == 0)
+ return -EINVAL;
+ return val;
+}
+
+/**
+ * snd_pcm_format_physical_width - return the physical bit-width of the format
+ * @format: the format to check
+ *
+ * Returns the physical bit-width of the format, or a negative error code
+ * if unknown format.
+ */
+int snd_pcm_format_physical_width(snd_pcm_format_t format)
+{
+ int val;
+ if (format < 0 || format > SNDRV_PCM_FORMAT_LAST)
+ return -EINVAL;
+ if ((val = pcm_formats[format].phys) == 0)
+ return -EINVAL;
+ return val;
+}
+
+/**
+ * snd_pcm_format_size - return the byte size of samples on the given format
+ * @format: the format to check
+ *
+ * Returns the byte size of the given samples for the format, or a
+ * negative error code if unknown format.
+ */
+ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples)
+{
+ int phys_width = snd_pcm_format_physical_width(format);
+ if (phys_width < 0)
+ return -EINVAL;
+ return samples * phys_width / 8;
+}
+
+/**
+ * snd_pcm_format_silence_64 - return the silent data in 8 bytes array
+ * @format: the format to check
+ *
+ * Returns the format pattern to fill or NULL if error.
+ */
+const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format)
+{
+ if (format < 0 || format > SNDRV_PCM_FORMAT_LAST)
+ return NULL;
+ if (! pcm_formats[format].phys)
+ return NULL;
+ return pcm_formats[format].silence;
+}
+
+/**
+ * snd_pcm_format_set_silence - set the silence data on the buffer
+ * @format: the PCM format
+ * @data: the buffer pointer
+ * @samples: the number of samples to set silence
+ *
+ * Sets the silence data on the buffer for the given samples.
+ *
+ * Returns zero if successful, or a negative error code on failure.
+ */
+int snd_pcm_format_set_silence(snd_pcm_format_t format, void *data, unsigned int samples)
+{
+ int width;
+ unsigned char *dst, *pat;
+
+ if (format < 0 || format > SNDRV_PCM_FORMAT_LAST)
+ return -EINVAL;
+ if (samples == 0)
+ return 0;
+ width = pcm_formats[format].phys; /* physical width */
+ pat = pcm_formats[format].silence;
+ if (! width)
+ return -EINVAL;
+ /* signed or 1 byte data */
+ if (pcm_formats[format].signd == 1 || width <= 8) {
+ unsigned int bytes = samples * width / 8;
+ memset(data, *pat, bytes);
+ return 0;
+ }
+ /* non-zero samples, fill using a loop */
+ width /= 8;
+ dst = data;
+#if 0
+ while (samples--) {
+ memcpy(dst, pat, width);
+ dst += width;
+ }
+#else
+ /* a bit optimization for constant width */
+ switch (width) {
+ case 2:
+ while (samples--) {
+ memcpy(dst, pat, 2);
+ dst += 2;
+ }
+ break;
+ case 3:
+ while (samples--) {
+ memcpy(dst, pat, 3);
+ dst += 3;
+ }
+ break;
+ case 4:
+ while (samples--) {
+ memcpy(dst, pat, 4);
+ dst += 4;
+ }
+ break;
+ case 8:
+ while (samples--) {
+ memcpy(dst, pat, 8);
+ dst += 8;
+ }
+ break;
+ }
+#endif
+ return 0;
+}
+
+/* [width][unsigned][bigendian] */
+static int linear_formats[4][2][2] = {
+ {{ SNDRV_PCM_FORMAT_S8, SNDRV_PCM_FORMAT_S8},
+ { SNDRV_PCM_FORMAT_U8, SNDRV_PCM_FORMAT_U8}},
+ {{SNDRV_PCM_FORMAT_S16_LE, SNDRV_PCM_FORMAT_S16_BE},
+ {SNDRV_PCM_FORMAT_U16_LE, SNDRV_PCM_FORMAT_U16_BE}},
+ {{SNDRV_PCM_FORMAT_S24_LE, SNDRV_PCM_FORMAT_S24_BE},
+ {SNDRV_PCM_FORMAT_U24_LE, SNDRV_PCM_FORMAT_U24_BE}},
+ {{SNDRV_PCM_FORMAT_S32_LE, SNDRV_PCM_FORMAT_S32_BE},
+ {SNDRV_PCM_FORMAT_U32_LE, SNDRV_PCM_FORMAT_U32_BE}}
+};
+
+/**
+ * snd_pcm_build_linear_format - return the suitable linear format for the given condition
+ * @width: the bit-width
+ * @unsignd: 1 if unsigned, 0 if signed.
+ * @big_endian: 1 if big-endian, 0 if little-endian
+ *
+ * Returns the suitable linear format for the given condition.
+ */
+snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian)
+{
+ if (width & 7)
+ return SND_PCM_FORMAT_UNKNOWN;
+ width = (width / 8) - 1;
+ if (width < 0 || width >= 4)
+ return SND_PCM_FORMAT_UNKNOWN;
+ return linear_formats[width][!!unsignd][!!big_endian];
+}
+
+/**
+ * snd_pcm_limit_hw_rates - determine rate_min/rate_max fields
+ * @runtime: the runtime instance
+ *
+ * Determines the rate_min and rate_max fields from the rates bits of
+ * the given runtime->hw.
+ *
+ * Returns zero if successful.
+ */
+int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime)
+{
+ static unsigned rates[] = {
+ /* ATTENTION: these values depend on the definition in pcm.h! */
+ 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
+ 64000, 88200, 96000, 176400, 192000
+ };
+ int i;
+ for (i = 0; i < (int)ARRAY_SIZE(rates); i++) {
+ if (runtime->hw.rates & (1 << i)) {
+ runtime->hw.rate_min = rates[i];
+ break;
+ }
+ }
+ for (i = (int)ARRAY_SIZE(rates) - 1; i >= 0; i--) {
+ if (runtime->hw.rates & (1 << i)) {
+ runtime->hw.rate_max = rates[i];
+ break;
+ }
+ }
+ return 0;
+}