*/
#include <sound/driver.h>
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+
#include <linux/time.h>
#include <sound/core.h>
#include <sound/pcm.h>
* Basic rate conversion plugin
*/
-typedef struct {
+struct rate_channel {
signed short last_S1;
signed short last_S2;
-} rate_channel_t;
+};
-typedef void (*rate_f)(snd_pcm_plugin_t *plugin,
- const snd_pcm_plugin_channel_t *src_channels,
- snd_pcm_plugin_channel_t *dst_channels,
+typedef void (*rate_f)(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
int src_frames, int dst_frames);
-typedef struct rate_private_data {
+struct rate_priv {
unsigned int pitch;
unsigned int pos;
rate_f func;
- int get, put;
snd_pcm_sframes_t old_src_frames, old_dst_frames;
- rate_channel_t channels[0];
-} rate_t;
+ struct rate_channel channels[0];
+};
-static void rate_init(snd_pcm_plugin_t *plugin)
+static void rate_init(struct snd_pcm_plugin *plugin)
{
unsigned int channel;
- rate_t *data = (rate_t *)plugin->extra_data;
+ struct rate_priv *data = (struct rate_priv *)plugin->extra_data;
data->pos = 0;
for (channel = 0; channel < plugin->src_format.channels; channel++) {
data->channels[channel].last_S1 = 0;
}
}
-static void resample_expand(snd_pcm_plugin_t *plugin,
- const snd_pcm_plugin_channel_t *src_channels,
- snd_pcm_plugin_channel_t *dst_channels,
+static void resample_expand(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
int src_frames, int dst_frames)
{
unsigned int pos = 0;
signed int val;
signed short S1, S2;
- char *src, *dst;
+ signed short *src, *dst;
unsigned int channel;
int src_step, dst_step;
int src_frames1, dst_frames1;
- rate_t *data = (rate_t *)plugin->extra_data;
- rate_channel_t *rchannels = data->channels;
-
-#define GET_S16_LABELS
-#define PUT_S16_LABELS
-#include "plugin_ops.h"
-#undef GET_S16_LABELS
-#undef PUT_S16_LABELS
- void *get = get_s16_labels[data->get];
- void *put = put_s16_labels[data->put];
- signed short sample = 0;
+ struct rate_priv *data = (struct rate_priv *)plugin->extra_data;
+ struct rate_channel *rchannels = data->channels;
for (channel = 0; channel < plugin->src_format.channels; channel++) {
pos = data->pos;
continue;
}
dst_channels[channel].enabled = 1;
- src = (char *)src_channels[channel].area.addr + src_channels[channel].area.first / 8;
- dst = (char *)dst_channels[channel].area.addr + dst_channels[channel].area.first / 8;
- src_step = src_channels[channel].area.step / 8;
- dst_step = dst_channels[channel].area.step / 8;
+ src = (signed short *)src_channels[channel].area.addr +
+ src_channels[channel].area.first / 8 / 2;
+ dst = (signed short *)dst_channels[channel].area.addr +
+ dst_channels[channel].area.first / 8 / 2;
+ src_step = src_channels[channel].area.step / 8 / 2;
+ dst_step = dst_channels[channel].area.step / 8 / 2;
src_frames1 = src_frames;
dst_frames1 = dst_frames;
while (dst_frames1-- > 0) {
pos &= R_MASK;
S1 = S2;
if (src_frames1-- > 0) {
- goto *get;
-#define GET_S16_END after_get
-#include "plugin_ops.h"
-#undef GET_S16_END
- after_get:
- S2 = sample;
+ S2 = *src;
src += src_step;
}
}
val = -32768;
else if (val > 32767)
val = 32767;
- sample = val;
- goto *put;
-#define PUT_S16_END after_put
-#include "plugin_ops.h"
-#undef PUT_S16_END
- after_put:
+ *dst = val;
dst += dst_step;
pos += data->pitch;
}
data->pos = pos;
}
-static void resample_shrink(snd_pcm_plugin_t *plugin,
- const snd_pcm_plugin_channel_t *src_channels,
- snd_pcm_plugin_channel_t *dst_channels,
+static void resample_shrink(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
int src_frames, int dst_frames)
{
unsigned int pos = 0;
signed int val;
signed short S1, S2;
- char *src, *dst;
+ signed short *src, *dst;
unsigned int channel;
int src_step, dst_step;
int src_frames1, dst_frames1;
- rate_t *data = (rate_t *)plugin->extra_data;
- rate_channel_t *rchannels = data->channels;
-
-#define GET_S16_LABELS
-#define PUT_S16_LABELS
-#include "plugin_ops.h"
-#undef GET_S16_LABELS
-#undef PUT_S16_LABELS
- void *get = get_s16_labels[data->get];
- void *put = put_s16_labels[data->put];
- signed short sample = 0;
+ struct rate_priv *data = (struct rate_priv *)plugin->extra_data;
+ struct rate_channel *rchannels = data->channels;
for (channel = 0; channel < plugin->src_format.channels; ++channel) {
pos = data->pos;
continue;
}
dst_channels[channel].enabled = 1;
- src = (char *)src_channels[channel].area.addr + src_channels[channel].area.first / 8;
- dst = (char *)dst_channels[channel].area.addr + dst_channels[channel].area.first / 8;
- src_step = src_channels[channel].area.step / 8;
- dst_step = dst_channels[channel].area.step / 8;
+ src = (signed short *)src_channels[channel].area.addr +
+ src_channels[channel].area.first / 8 / 2;
+ dst = (signed short *)dst_channels[channel].area.addr +
+ dst_channels[channel].area.first / 8 / 2;
+ src_step = src_channels[channel].area.step / 8 / 2;
+ dst_step = dst_channels[channel].area.step / 8 / 2;
src_frames1 = src_frames;
dst_frames1 = dst_frames;
while (dst_frames1 > 0) {
S1 = S2;
if (src_frames1-- > 0) {
- goto *get;
-#define GET_S16_END after_get
-#include "plugin_ops.h"
-#undef GET_S16_END
- after_get:
- S2 = sample;
+ S1 = *src;
src += src_step;
}
if (pos & ~R_MASK) {
val = -32768;
else if (val > 32767)
val = 32767;
- sample = val;
- goto *put;
-#define PUT_S16_END after_put
-#include "plugin_ops.h"
-#undef PUT_S16_END
- after_put:
+ *dst = val;
dst += dst_step;
dst_frames1--;
}
data->pos = pos;
}
-static snd_pcm_sframes_t rate_src_frames(snd_pcm_plugin_t *plugin, snd_pcm_uframes_t frames)
+static snd_pcm_sframes_t rate_src_frames(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames)
{
- rate_t *data;
+ struct rate_priv *data;
snd_pcm_sframes_t res;
snd_assert(plugin != NULL, return -ENXIO);
if (frames == 0)
return 0;
- data = (rate_t *)plugin->extra_data;
+ data = (struct rate_priv *)plugin->extra_data;
if (plugin->src_format.rate < plugin->dst_format.rate) {
res = (((frames * data->pitch) + (BITS/2)) >> SHIFT);
} else {
return res;
}
-static snd_pcm_sframes_t rate_dst_frames(snd_pcm_plugin_t *plugin, snd_pcm_uframes_t frames)
+static snd_pcm_sframes_t rate_dst_frames(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames)
{
- rate_t *data;
+ struct rate_priv *data;
snd_pcm_sframes_t res;
snd_assert(plugin != NULL, return -ENXIO);
if (frames == 0)
return 0;
- data = (rate_t *)plugin->extra_data;
+ data = (struct rate_priv *)plugin->extra_data;
if (plugin->src_format.rate < plugin->dst_format.rate) {
res = (((frames << SHIFT) + (data->pitch / 2)) / data->pitch);
} else {
return res;
}
-static snd_pcm_sframes_t rate_transfer(snd_pcm_plugin_t *plugin,
- const snd_pcm_plugin_channel_t *src_channels,
- snd_pcm_plugin_channel_t *dst_channels,
+static snd_pcm_sframes_t rate_transfer(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
snd_pcm_uframes_t frames)
{
snd_pcm_uframes_t dst_frames;
- rate_t *data;
+ struct rate_priv *data;
snd_assert(plugin != NULL && src_channels != NULL && dst_channels != NULL, return -ENXIO);
if (frames == 0)
dst_frames = rate_dst_frames(plugin, frames);
if (dst_frames > dst_channels[0].frames)
dst_frames = dst_channels[0].frames;
- data = (rate_t *)plugin->extra_data;
+ data = (struct rate_priv *)plugin->extra_data;
data->func(plugin, src_channels, dst_channels, frames, dst_frames);
return dst_frames;
}
-static int rate_action(snd_pcm_plugin_t *plugin,
- snd_pcm_plugin_action_t action,
- unsigned long udata ATTRIBUTE_UNUSED)
+static int rate_action(struct snd_pcm_plugin *plugin,
+ enum snd_pcm_plugin_action action,
+ unsigned long udata)
{
snd_assert(plugin != NULL, return -ENXIO);
switch (action) {
return 0; /* silenty ignore other actions */
}
-int snd_pcm_plugin_build_rate(snd_pcm_plug_t *plug,
- snd_pcm_plugin_format_t *src_format,
- snd_pcm_plugin_format_t *dst_format,
- snd_pcm_plugin_t **r_plugin)
+int snd_pcm_plugin_build_rate(struct snd_pcm_substream *plug,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ struct snd_pcm_plugin **r_plugin)
{
int err;
- rate_t *data;
- snd_pcm_plugin_t *plugin;
+ struct rate_priv *data;
+ struct snd_pcm_plugin *plugin;
snd_assert(r_plugin != NULL, return -ENXIO);
*r_plugin = NULL;
snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
snd_assert(src_format->channels > 0, return -ENXIO);
- snd_assert(snd_pcm_format_linear(src_format->format) != 0, return -ENXIO);
- snd_assert(snd_pcm_format_linear(dst_format->format) != 0, return -ENXIO);
+ snd_assert(src_format->format == SNDRV_PCM_FORMAT_S16, return -ENXIO);
+ snd_assert(dst_format->format == SNDRV_PCM_FORMAT_S16, return -ENXIO);
snd_assert(src_format->rate != dst_format->rate, return -ENXIO);
err = snd_pcm_plugin_build(plug, "rate conversion",
src_format, dst_format,
- sizeof(rate_t) + src_format->channels * sizeof(rate_channel_t),
+ sizeof(struct rate_priv) +
+ src_format->channels * sizeof(struct rate_channel),
&plugin);
if (err < 0)
return err;
- data = (rate_t *)plugin->extra_data;
- data->get = getput_index(src_format->format);
- snd_assert(data->get >= 0 && data->get < 4*2*2, return -EINVAL);
- data->put = getput_index(dst_format->format);
- snd_assert(data->put >= 0 && data->put < 4*2*2, return -EINVAL);
-
+ data = (struct rate_priv *)plugin->extra_data;
if (src_format->rate < dst_format->rate) {
data->pitch = ((src_format->rate << SHIFT) + (dst_format->rate >> 1)) / dst_format->rate;
data->func = resample_expand;
*r_plugin = plugin;
return 0;
}
+
+#endif
git://git.onelab.eu / linux-2.6.git / blobdiff