40 typedef void (*rate_f)(struct snd_pcm_plugin *plugin,
53 static void rate_init(struct snd_pcm_plugin *plugin)  in rate_init()  argument
56 	struct rate_priv *data = (struct rate_priv *)plugin->extra_data;  in rate_init()
58 	for (channel = 0; channel < plugin->src_format.channels; channel++) {  in rate_init()
64 static void resample_expand(struct snd_pcm_plugin *plugin,  in resample_expand()  argument
76 	struct rate_priv *data = (struct rate_priv *)plugin->extra_data;  in resample_expand()
79 	for (channel = 0; channel < plugin->src_format.channels; channel++) {  in resample_expand()
85 				snd_pcm_area_silence(&dst_channels[channel].area, 0, dst_frames, plugin->dst_format.format);  in resample_expand()
123 static void resample_shrink(struct snd_pcm_plugin *plugin,  in resample_shrink()  argument
135 	struct rate_priv *data = (struct rate_priv *)plugin->extra_data;  in resample_shrink()
138 	for (channel = 0; channel < plugin->src_format.channels; ++channel) {  in resample_shrink()
144 				snd_pcm_area_silence(&dst_channels[channel].area, 0, dst_frames, plugin->dst_format.format);  in resample_shrink()
183 static snd_pcm_sframes_t rate_src_frames(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames)  in rate_src_frames()  argument
188 	if (snd_BUG_ON(!plugin))  in rate_src_frames()
192 	data = (struct rate_priv *)plugin->extra_data;  in rate_src_frames()
193 	if (plugin->src_format.rate < plugin->dst_format.rate) {  in rate_src_frames()
216 static snd_pcm_sframes_t rate_dst_frames(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames)  in rate_dst_frames()  argument
221 	if (snd_BUG_ON(!plugin))  in rate_dst_frames()
225 	data = (struct rate_priv *)plugin->extra_data;  in rate_dst_frames()
226 	if (plugin->src_format.rate < plugin->dst_format.rate) {  in rate_dst_frames()
249 static snd_pcm_sframes_t rate_transfer(struct snd_pcm_plugin *plugin,  in rate_transfer()  argument
257 	if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))  in rate_transfer()
264 		for (channel = 0; channel < plugin->src_format.channels; channel++) {  in rate_transfer()
275 	dst_frames = rate_dst_frames(plugin, frames);  in rate_transfer()
278 	data = (struct rate_priv *)plugin->extra_data;  in rate_transfer()
279 	data->func(plugin, src_channels, dst_channels, frames, dst_frames);  in rate_transfer()
283 static int rate_action(struct snd_pcm_plugin *plugin,  in rate_action()  argument
287 	if (snd_BUG_ON(!plugin))  in rate_action()
292 		rate_init(plugin);  in rate_action()
307 	struct snd_pcm_plugin *plugin;  in snd_pcm_plugin_build_rate()  local
328 				   &plugin);  in snd_pcm_plugin_build_rate()
331 	data = (struct rate_priv *)plugin->extra_data;  in snd_pcm_plugin_build_rate()
340 	rate_init(plugin);  in snd_pcm_plugin_build_rate()
342 	plugin->transfer = rate_transfer;  in snd_pcm_plugin_build_rate()
343 	plugin->src_frames = rate_src_frames;  in snd_pcm_plugin_build_rate()
344 	plugin->dst_frames = rate_dst_frames;  in snd_pcm_plugin_build_rate()
345 	plugin->action = rate_action;  in snd_pcm_plugin_build_rate()
346 	*r_plugin = plugin;  in snd_pcm_plugin_build_rate()