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()
60 	struct linear_priv *data = (struct linear_priv *)plugin->extra_data;  in convert()
61 	int channel;  in convert()  local
62 	int nchannels = plugin->src_format.channels;  in convert()
63 	for (channel = 0; channel < nchannels; ++channel) {  in convert()
68 		if (!src_channels[channel].enabled) {  in convert()
69 			if (dst_channels[channel].wanted)  in convert()
70 				snd_pcm_area_silence(&dst_channels[channel].area, 0, frames, plugin->dst_format.format);  in convert()
71 			dst_channels[channel].enabled = 0;  in convert()
74 		dst_channels[channel].enabled = 1;  in convert()
75 		src = src_channels[channel].area.addr + src_channels[channel].area.first / 8;  in convert()
76 		dst = dst_channels[channel].area.addr + dst_channels[channel].area.first / 8;  in convert()
77 		src_step = src_channels[channel].area.step / 8;  in convert()
78 		dst_step = dst_channels[channel].area.step / 8;  in convert()
80 		while (frames1-- > 0) {  in convert()
94 		return -ENXIO;  in linear_transfer()
99 		unsigned int channel;  in linear_transfer()  local
100 		for (channel = 0; channel < plugin->src_format.channels; channel++) {  in linear_transfer()
101 			if (snd_BUG_ON(src_channels[channel].area.first % 8 ||  in linear_transfer()
102 				       src_channels[channel].area.step % 8))  in linear_transfer()
103 				return -ENXIO;  in linear_transfer()
104 			if (snd_BUG_ON(dst_channels[channel].area.first % 8 ||  in linear_transfer()
105 				       dst_channels[channel].area.step % 8))  in linear_transfer()
106 				return -ENXIO;  in linear_transfer()
121 	src_bytes = snd_pcm_format_width(src_format) / 8;  in init_data()
122 	dst_bytes = snd_pcm_format_width(dst_format) / 8;  in init_data()
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()