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Diffstat (limited to 'sound/core/oss/rate.c')
-rw-r--r--sound/core/oss/rate.c85
1 files changed, 43 insertions, 42 deletions
diff --git a/sound/core/oss/rate.c b/sound/core/oss/rate.c
index 1096ec186714..4854cef6fb4f 100644
--- a/sound/core/oss/rate.c
+++ b/sound/core/oss/rate.c
@@ -33,29 +33,29 @@
* 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;
@@ -63,9 +63,9 @@ static void rate_init(snd_pcm_plugin_t *plugin)
}
}
-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;
@@ -75,8 +75,8 @@ static void resample_expand(snd_pcm_plugin_t *plugin,
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;
+ struct rate_priv *data = (struct rate_priv *)plugin->extra_data;
+ struct rate_channel *rchannels = data->channels;
#define GET_S16_LABELS
#define PUT_S16_LABELS
@@ -139,9 +139,9 @@ static void resample_expand(snd_pcm_plugin_t *plugin,
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;
@@ -151,8 +151,8 @@ static void resample_shrink(snd_pcm_plugin_t *plugin,
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;
+ struct rate_priv *data = (struct rate_priv *)plugin->extra_data;
+ struct rate_channel *rchannels = data->channels;
#define GET_S16_LABELS
#define PUT_S16_LABELS
@@ -216,15 +216,15 @@ static void resample_shrink(snd_pcm_plugin_t *plugin,
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 {
@@ -248,15 +248,15 @@ static snd_pcm_sframes_t rate_src_frames(snd_pcm_plugin_t *plugin, snd_pcm_ufram
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 {
@@ -280,13 +280,13 @@ static snd_pcm_sframes_t rate_dst_frames(snd_pcm_plugin_t *plugin, snd_pcm_ufram
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)
@@ -308,14 +308,14 @@ static snd_pcm_sframes_t rate_transfer(snd_pcm_plugin_t *plugin,
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) {
@@ -329,14 +329,14 @@ static int rate_action(snd_pcm_plugin_t *plugin,
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;
@@ -349,11 +349,12 @@ int snd_pcm_plugin_build_rate(snd_pcm_plug_t *plug,
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 = (struct rate_priv *)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);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.