int snd_pcm_plugin_build_io(struct snd_pcm_substream *plug,
struct snd_pcm_hw_params *params,
struct snd_pcm_plugin **r_plugin)
{
int err;
struct snd_pcm_plugin_format format;
struct snd_pcm_plugin *plugin;
if (snd_BUG_ON(!r_plugin))
return -ENXIO;
*r_plugin = NULL;
if (snd_BUG_ON(!plug || !params))
return -ENXIO;
format.format = params_format(params);
format.rate = params_rate(params);
format.channels = params_channels(params);
err = snd_pcm_plugin_build(plug, "I/O io",
&format, &format,
sizeof(void *) * format.channels,
&plugin);
if (err < 0)
return err;
plugin->access = params_access(params);
if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) {
plugin->transfer = io_playback_transfer;
if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
plugin->client_channels = io_src_channels;
} else {
plugin->transfer = io_capture_transfer;
}
*r_plugin = plugin;
return 0;
}
int snd_pcm_plugin_build_copy(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;
struct snd_pcm_plugin *plugin;
int width;
snd_assert(r_plugin != NULL, return -ENXIO);
*r_plugin = NULL;
snd_assert(src_format->format == dst_format->format, return -ENXIO);
snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
width = snd_pcm_format_physical_width(src_format->format);
snd_assert(width > 0, return -ENXIO);
err = snd_pcm_plugin_build(plug, "copy", src_format, dst_format,
0, &plugin);
if (err < 0)
return err;
plugin->transfer = copy_transfer;
*r_plugin = plugin;
return 0;
}
int snd_pcm_plugin_build_linear(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;
struct linear_priv *data;
struct snd_pcm_plugin *plugin;
if (snd_BUG_ON(!r_plugin))
return -ENXIO;
*r_plugin = NULL;
if (snd_BUG_ON(src_format->rate != dst_format->rate))
return -ENXIO;
if (snd_BUG_ON(src_format->channels != dst_format->channels))
return -ENXIO;
if (snd_BUG_ON(!snd_pcm_format_linear(src_format->format) ||
!snd_pcm_format_linear(dst_format->format)))
return -ENXIO;
err = snd_pcm_plugin_build(plug, "linear format conversion",
src_format, dst_format,
sizeof(struct linear_priv), &plugin);
if (err < 0)
return err;
data = (struct linear_priv *)plugin->extra_data;
init_data(data, src_format->format, dst_format->format);
plugin->transfer = linear_transfer;
*r_plugin = plugin;
return 0;
}
int snd_pcm_plugin_build_route(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)
{
struct snd_pcm_plugin *plugin;
int err;
if (snd_BUG_ON(!r_plugin))
return -ENXIO;
*r_plugin = NULL;
if (snd_BUG_ON(src_format->rate != dst_format->rate))
return -ENXIO;
if (snd_BUG_ON(src_format->format != dst_format->format))
return -ENXIO;
err = snd_pcm_plugin_build(plug, "route conversion",
src_format, dst_format, 0, &plugin);
if (err < 0)
return err;
plugin->transfer = route_transfer;
*r_plugin = plugin;
return 0;
}
int snd_pcm_plugin_build_linear(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;
struct linear_priv *data;
struct snd_pcm_plugin *plugin;
snd_assert(r_plugin != NULL, return -ENXIO);
*r_plugin = NULL;
snd_assert(src_format->rate == dst_format->rate, return -ENXIO);
snd_assert(src_format->channels == dst_format->channels, return -ENXIO);
snd_assert(snd_pcm_format_linear(src_format->format) &&
snd_pcm_format_linear(dst_format->format), return -ENXIO);
err = snd_pcm_plugin_build(plug, "linear format conversion",
src_format, dst_format,
sizeof(struct linear_priv), &plugin);
if (err < 0)
return err;
data = (struct linear_priv *)plugin->extra_data;
init_data(data, src_format->format, dst_format->format);
plugin->transfer = linear_transfer;
*r_plugin = plugin;
return 0;
}
int snd_pcm_plugin_build_copy(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;
struct snd_pcm_plugin *plugin;
int width;
if (snd_BUG_ON(!r_plugin))
return -ENXIO;
*r_plugin = NULL;
if (snd_BUG_ON(src_format->format != dst_format->format))
return -ENXIO;
if (snd_BUG_ON(src_format->rate != dst_format->rate))
return -ENXIO;
if (snd_BUG_ON(src_format->channels != dst_format->channels))
return -ENXIO;
width = snd_pcm_format_physical_width(src_format->format);
if (snd_BUG_ON(width <= 0))
return -ENXIO;
err = snd_pcm_plugin_build(plug, "copy", src_format, dst_format,
0, &plugin);
if (err < 0)
return err;
plugin->transfer = copy_transfer;
*r_plugin = plugin;
return 0;
}
