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authorTakashi Iwai <tiwai@suse.de>2007-08-08 16:49:08 +0200
committerJaroslav Kysela <perex@perex.cz>2007-10-16 15:58:31 +0200
commit64d27f96cb719cf8b5dae634c4c548049d4ae6bf (patch)
treef10c68d67e15711d48a92ed258c93ca9018e5584 /sound
parent9390ec85c0ab98444140190f936a37fa4eb945a2 (diff)
[ALSA] Support 3-bytes 24bit format in PCM OSS emulation
Add the support of 3-bytes 24bit formats in PCM OSS emulation. Also removed snd_pcm_build_linear_format() function. It's exported just for OSS emulation, and now the code was changed without calling this function. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound')
-rw-r--r--sound/core/oss/pcm_plugin.c56
-rw-r--r--sound/core/pcm_misc.c32
2 files changed, 29 insertions, 59 deletions
diff --git a/sound/core/oss/pcm_plugin.c b/sound/core/oss/pcm_plugin.c
index c0afb92869d..25dcf96a5dc 100644
--- a/sound/core/oss/pcm_plugin.c
+++ b/sound/core/oss/pcm_plugin.c
@@ -264,6 +264,8 @@ static int snd_pcm_plug_formats(struct snd_mask *mask, int format)
SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE |
SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_U24_BE | SNDRV_PCM_FMTBIT_S24_BE |
+ SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_S24_3LE |
+ SNDRV_PCM_FMTBIT_U24_3BE | SNDRV_PCM_FMTBIT_S24_3BE |
SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE |
SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE);
snd_mask_set(&formats, SNDRV_PCM_FORMAT_MU_LAW);
@@ -280,6 +282,10 @@ static int preferred_formats[] = {
SNDRV_PCM_FORMAT_S16_BE,
SNDRV_PCM_FORMAT_U16_LE,
SNDRV_PCM_FORMAT_U16_BE,
+ SNDRV_PCM_FORMAT_S24_3LE,
+ SNDRV_PCM_FORMAT_S24_3BE,
+ SNDRV_PCM_FORMAT_U24_3LE,
+ SNDRV_PCM_FORMAT_U24_3BE,
SNDRV_PCM_FORMAT_S24_LE,
SNDRV_PCM_FORMAT_S24_BE,
SNDRV_PCM_FORMAT_U24_LE,
@@ -294,41 +300,37 @@ static int preferred_formats[] = {
int snd_pcm_plug_slave_format(int format, struct snd_mask *format_mask)
{
+ int i;
+
if (snd_mask_test(format_mask, format))
return format;
if (! snd_pcm_plug_formats(format_mask, format))
return -EINVAL;
if (snd_pcm_format_linear(format)) {
- int width = snd_pcm_format_width(format);
- int unsignd = snd_pcm_format_unsigned(format);
- int big = snd_pcm_format_big_endian(format);
- int format1;
- int wid, width1=width;
- int dwidth1 = 8;
- for (wid = 0; wid < 4; ++wid) {
- int end, big1 = big;
- for (end = 0; end < 2; ++end) {
- int sgn, unsignd1 = unsignd;
- for (sgn = 0; sgn < 2; ++sgn) {
- format1 = snd_pcm_build_linear_format(width1, unsignd1, big1);
- if (format1 >= 0 &&
- snd_mask_test(format_mask, format1))
- goto _found;
- unsignd1 = !unsignd1;
- }
- big1 = !big1;
- }
- if (width1 == 32) {
- dwidth1 = -dwidth1;
- width1 = width;
+ unsigned int width = snd_pcm_format_width(format);
+ int unsignd = snd_pcm_format_unsigned(format) > 0;
+ int big = snd_pcm_format_big_endian(format) > 0;
+ unsigned int badness, best = -1;
+ int best_format = -1;
+ for (i = 0; i < ARRAY_SIZE(preferred_formats); i++) {
+ int f = preferred_formats[i];
+ unsigned int w;
+ if (!snd_mask_test(format_mask, f))
+ continue;
+ w = snd_pcm_format_width(f);
+ if (w >= width)
+ badness = w - width;
+ else
+ badness = width - w + 32;
+ badness += snd_pcm_format_unsigned(f) != unsignd;
+ badness += snd_pcm_format_big_endian(f) != big;
+ if (badness < best) {
+ best_format = f;
+ best = badness;
}
- width1 += dwidth1;
}
- return -EINVAL;
- _found:
- return format1;
+ return best_format >= 0 ? best_format : -EINVAL;
} else {
- unsigned int i;
switch (format) {
case SNDRV_PCM_FORMAT_MU_LAW:
for (i = 0; i < ARRAY_SIZE(preferred_formats); ++i) {
diff --git a/sound/core/pcm_misc.c b/sound/core/pcm_misc.c
index 0019c59a779..9142fce4dda 100644
--- a/sound/core/pcm_misc.c
+++ b/sound/core/pcm_misc.c
@@ -422,38 +422,6 @@ int snd_pcm_format_set_silence(snd_pcm_format_t format, void *data, unsigned int
EXPORT_SYMBOL(snd_pcm_format_set_silence);
-/* [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];
-}
-
-EXPORT_SYMBOL(snd_pcm_build_linear_format);
-
/**
* snd_pcm_limit_hw_rates - determine rate_min/rate_max fields
* @runtime: the runtime instance