2  *  Linear conversion Plug-In
4  *			  Abramo Bagnara <abramo@alsa-project.org>
19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
48 	memcpy(p + data->copy_ofs, src + data->src_ofs, data->copy_bytes);  in do_convert()
49 	if (data->cvt_endian)  in do_convert()
51 	tmp ^= data->flip;  in do_convert()
52 	memcpy(dst, p + data->dst_ofs, data->dst_bytes);  in do_convert()
55 static void convert(struct snd_pcm_plugin *plugin,  in convert()  function
60 	struct linear_priv *data = (struct linear_priv *)plugin->extra_data;  in convert()
62 	int nchannels = plugin->src_format.channels;  in convert()
70 				snd_pcm_area_silence(&dst_channels[channel].area, 0, frames, plugin->dst_format.format);  in convert()
80 		while (frames1-- > 0) {  in convert()
94 		return -ENXIO;  in linear_transfer()
100 		for (channel = 0; channel < plugin->src_format.channels; channel++) {  in linear_transfer()
103 				return -ENXIO;  in linear_transfer()
106 				return -ENXIO;  in linear_transfer()
112 	convert(plugin, src_channels, dst_channels, frames);  in linear_transfer()
126 	data->dst_bytes = dst_bytes;  in init_data()
127 	data->cvt_endian = src_le != dst_le;  in init_data()
128 	data->copy_bytes = src_bytes < dst_bytes ? src_bytes : dst_bytes;  in init_data()
130 		data->copy_ofs = 4 - data->copy_bytes;  in init_data()
131 		data->src_ofs = src_bytes - data->copy_bytes;  in init_data()
133 		data->src_ofs = snd_pcm_format_physical_width(src_format) / 8 -  in init_data()
136 		data->dst_ofs = 4 - data->dst_bytes;  in init_data()
138 		data->dst_ofs = snd_pcm_format_physical_width(dst_format) / 8 -  in init_data()
143 			data->flip = (__force u32)cpu_to_le32(0x80000000);  in init_data()
145 			data->flip = (__force u32)cpu_to_be32(0x80000000);  in init_data()
159 		return -ENXIO;  in snd_pcm_plugin_build_linear()
162 	if (snd_BUG_ON(src_format->rate != dst_format->rate))  in snd_pcm_plugin_build_linear()
163 		return -ENXIO;  in snd_pcm_plugin_build_linear()
164 	if (snd_BUG_ON(src_format->channels != dst_format->channels))  in snd_pcm_plugin_build_linear()
165 		return -ENXIO;  in snd_pcm_plugin_build_linear()
166 	if (snd_BUG_ON(!snd_pcm_format_linear(src_format->format) ||  in snd_pcm_plugin_build_linear()
167 		       !snd_pcm_format_linear(dst_format->format)))  in snd_pcm_plugin_build_linear()
168 		return -ENXIO;  in snd_pcm_plugin_build_linear()
175 	data = (struct linear_priv *)plugin->extra_data;  in snd_pcm_plugin_build_linear()
176 	init_data(data, src_format->format, dst_format->format);  in snd_pcm_plugin_build_linear()
177 	plugin->transfer = linear_transfer;  in snd_pcm_plugin_build_linear()