/*
* PCM Plug-In shared (kernel/library) code
- * Copyright (c) 1999 by Jaroslav Kysela <perex@suse.cz>
+ * Copyright (c) 1999 by Jaroslav Kysela <perex@perex.cz>
* Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
*
*
#define snd_pcm_plug_first(plug) ((plug)->runtime->oss.plugin_first)
#define snd_pcm_plug_last(plug) ((plug)->runtime->oss.plugin_last)
-static int snd_pcm_plugin_src_channels_mask(snd_pcm_plugin_t *plugin,
- bitset_t *dst_vmask,
- bitset_t **src_vmask)
-{
- bitset_t *vmask = plugin->src_vmask;
- bitset_copy(vmask, dst_vmask, plugin->src_format.channels);
- *src_vmask = vmask;
- return 0;
-}
-
-static int snd_pcm_plugin_dst_channels_mask(snd_pcm_plugin_t *plugin,
- bitset_t *src_vmask,
- bitset_t **dst_vmask)
-{
- bitset_t *vmask = plugin->dst_vmask;
- bitset_copy(vmask, src_vmask, plugin->dst_format.channels);
- *dst_vmask = vmask;
- return 0;
-}
-
/*
* because some cards might have rates "very close", we ignore
* all "resampling" requests within +-5%
return dst_rate >= low && dst_rate <= high;
}
-static int snd_pcm_plugin_alloc(snd_pcm_plugin_t *plugin, snd_pcm_uframes_t frames)
+static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames)
{
- snd_pcm_plugin_format_t *format;
+ struct snd_pcm_plugin_format *format;
ssize_t width;
size_t size;
unsigned int channel;
- snd_pcm_plugin_channel_t *c;
+ struct snd_pcm_plugin_channel *c;
if (plugin->stream == SNDRV_PCM_STREAM_PLAYBACK) {
format = &plugin->src_format;
return 0;
}
-int snd_pcm_plug_alloc(snd_pcm_plug_t *plug, snd_pcm_uframes_t frames)
+int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames)
{
int err;
snd_assert(snd_pcm_plug_first(plug) != NULL, return -ENXIO);
if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) {
- snd_pcm_plugin_t *plugin = snd_pcm_plug_first(plug);
+ struct snd_pcm_plugin *plugin = snd_pcm_plug_first(plug);
while (plugin->next) {
if (plugin->dst_frames)
frames = plugin->dst_frames(plugin, frames);
return err;
}
} else {
- snd_pcm_plugin_t *plugin = snd_pcm_plug_last(plug);
+ struct snd_pcm_plugin *plugin = snd_pcm_plug_last(plug);
while (plugin->prev) {
if (plugin->src_frames)
frames = plugin->src_frames(plugin, frames);
}
-snd_pcm_sframes_t snd_pcm_plugin_client_channels(snd_pcm_plugin_t *plugin,
+snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin,
snd_pcm_uframes_t frames,
- snd_pcm_plugin_channel_t **channels)
+ struct snd_pcm_plugin_channel **channels)
{
*channels = plugin->buf_channels;
return frames;
}
-int snd_pcm_plugin_build(snd_pcm_plug_t *plug,
+int snd_pcm_plugin_build(struct snd_pcm_substream *plug,
const char *name,
- snd_pcm_plugin_format_t *src_format,
- snd_pcm_plugin_format_t *dst_format,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
size_t extra,
- snd_pcm_plugin_t **ret)
+ struct snd_pcm_plugin **ret)
{
- snd_pcm_plugin_t *plugin;
+ struct snd_pcm_plugin *plugin;
unsigned int channels;
snd_assert(plug != NULL, return -ENXIO);
snd_assert(src_format != NULL && dst_format != NULL, return -ENXIO);
- plugin = kcalloc(1, sizeof(*plugin) + extra, GFP_KERNEL);
+ plugin = kzalloc(sizeof(*plugin) + extra, GFP_KERNEL);
if (plugin == NULL)
return -ENOMEM;
plugin->name = name;
snd_pcm_plugin_free(plugin);
return -ENOMEM;
}
- plugin->src_vmask = bitset_alloc(src_format->channels);
- if (plugin->src_vmask == NULL) {
- snd_pcm_plugin_free(plugin);
- return -ENOMEM;
- }
- plugin->dst_vmask = bitset_alloc(dst_format->channels);
- if (plugin->dst_vmask == NULL) {
- snd_pcm_plugin_free(plugin);
- return -ENOMEM;
- }
plugin->client_channels = snd_pcm_plugin_client_channels;
- plugin->src_channels_mask = snd_pcm_plugin_src_channels_mask;
- plugin->dst_channels_mask = snd_pcm_plugin_dst_channels_mask;
*ret = plugin;
return 0;
}
-int snd_pcm_plugin_free(snd_pcm_plugin_t *plugin)
+int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin)
{
if (! plugin)
return 0;
plugin->private_free(plugin);
kfree(plugin->buf_channels);
vfree(plugin->buf);
- kfree(plugin->src_vmask);
- kfree(plugin->dst_vmask);
kfree(plugin);
return 0;
}
-snd_pcm_sframes_t snd_pcm_plug_client_size(snd_pcm_plug_t *plug, snd_pcm_uframes_t drv_frames)
+snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t drv_frames)
{
- snd_pcm_plugin_t *plugin, *plugin_prev, *plugin_next;
+ struct snd_pcm_plugin *plugin, *plugin_prev, *plugin_next;
int stream = snd_pcm_plug_stream(plug);
snd_assert(plug != NULL, return -ENXIO);
return drv_frames;
}
-snd_pcm_sframes_t snd_pcm_plug_slave_size(snd_pcm_plug_t *plug, snd_pcm_uframes_t clt_frames)
+snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t clt_frames)
{
- snd_pcm_plugin_t *plugin, *plugin_prev, *plugin_next;
+ struct snd_pcm_plugin *plugin, *plugin_prev, *plugin_next;
snd_pcm_sframes_t frames;
int stream = snd_pcm_plug_stream(plug);
return frames;
}
-static int snd_pcm_plug_formats(snd_mask_t *mask, int format)
+static int snd_pcm_plug_formats(struct snd_mask *mask, int format)
{
- snd_mask_t formats = *mask;
+ struct snd_mask formats = *mask;
u64 linfmts = (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE |
SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_U24_BE | SNDRV_PCM_FMTBIT_S24_BE |
+ SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_S24_3LE |
+ SNDRV_PCM_FMTBIT_U24_3BE | SNDRV_PCM_FMTBIT_S24_3BE |
SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE |
SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE);
snd_mask_set(&formats, SNDRV_PCM_FORMAT_MU_LAW);
SNDRV_PCM_FORMAT_S16_BE,
SNDRV_PCM_FORMAT_U16_LE,
SNDRV_PCM_FORMAT_U16_BE,
+ SNDRV_PCM_FORMAT_S24_3LE,
+ SNDRV_PCM_FORMAT_S24_3BE,
+ SNDRV_PCM_FORMAT_U24_3LE,
+ SNDRV_PCM_FORMAT_U24_3BE,
SNDRV_PCM_FORMAT_S24_LE,
SNDRV_PCM_FORMAT_S24_BE,
SNDRV_PCM_FORMAT_U24_LE,
SNDRV_PCM_FORMAT_U8
};
-int snd_pcm_plug_slave_format(int format, snd_mask_t *format_mask)
+int snd_pcm_plug_slave_format(int format, struct snd_mask *format_mask)
{
+ int i;
+
if (snd_mask_test(format_mask, format))
return format;
if (! snd_pcm_plug_formats(format_mask, format))
return -EINVAL;
if (snd_pcm_format_linear(format)) {
- int width = snd_pcm_format_width(format);
- int unsignd = snd_pcm_format_unsigned(format);
- int big = snd_pcm_format_big_endian(format);
- int format1;
- int wid, width1=width;
- int dwidth1 = 8;
- for (wid = 0; wid < 4; ++wid) {
- int end, big1 = big;
- for (end = 0; end < 2; ++end) {
- int sgn, unsignd1 = unsignd;
- for (sgn = 0; sgn < 2; ++sgn) {
- format1 = snd_pcm_build_linear_format(width1, unsignd1, big1);
- if (format1 >= 0 &&
- snd_mask_test(format_mask, format1))
- goto _found;
- unsignd1 = !unsignd1;
- }
- big1 = !big1;
- }
- if (width1 == 32) {
- dwidth1 = -dwidth1;
- width1 = width;
+ unsigned int width = snd_pcm_format_width(format);
+ int unsignd = snd_pcm_format_unsigned(format) > 0;
+ int big = snd_pcm_format_big_endian(format) > 0;
+ unsigned int badness, best = -1;
+ int best_format = -1;
+ for (i = 0; i < ARRAY_SIZE(preferred_formats); i++) {
+ int f = preferred_formats[i];
+ unsigned int w;
+ if (!snd_mask_test(format_mask, f))
+ continue;
+ w = snd_pcm_format_width(f);
+ if (w >= width)
+ badness = w - width;
+ else
+ badness = width - w + 32;
+ badness += snd_pcm_format_unsigned(f) != unsignd;
+ badness += snd_pcm_format_big_endian(f) != big;
+ if (badness < best) {
+ best_format = f;
+ best = badness;
}
- width1 += dwidth1;
}
- return -EINVAL;
- _found:
- return format1;
+ return best_format >= 0 ? best_format : -EINVAL;
} else {
- unsigned int i;
switch (format) {
case SNDRV_PCM_FORMAT_MU_LAW:
for (i = 0; i < ARRAY_SIZE(preferred_formats); ++i) {
}
}
-int snd_pcm_plug_format_plugins(snd_pcm_plug_t *plug,
- snd_pcm_hw_params_t *params,
- snd_pcm_hw_params_t *slave_params)
+int snd_pcm_plug_format_plugins(struct snd_pcm_substream *plug,
+ struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_params *slave_params)
{
- snd_pcm_plugin_format_t tmpformat;
- snd_pcm_plugin_format_t dstformat;
- snd_pcm_plugin_format_t srcformat;
+ struct snd_pcm_plugin_format tmpformat;
+ struct snd_pcm_plugin_format dstformat;
+ struct snd_pcm_plugin_format srcformat;
int src_access, dst_access;
- snd_pcm_plugin_t *plugin = NULL;
+ struct snd_pcm_plugin *plugin = NULL;
int err;
int stream = snd_pcm_plug_stream(plug);
int slave_interleaved = (params_channels(slave_params) == 1 ||
dstformat.channels);
/* Format change (linearization) */
- if ((srcformat.format != dstformat.format ||
- !rate_match(srcformat.rate, dstformat.rate) ||
- srcformat.channels != dstformat.channels) &&
- !snd_pcm_format_linear(srcformat.format)) {
- if (snd_pcm_format_linear(dstformat.format))
- tmpformat.format = dstformat.format;
- else
- tmpformat.format = SNDRV_PCM_FORMAT_S16;
- switch (srcformat.format) {
- case SNDRV_PCM_FORMAT_MU_LAW:
- err = snd_pcm_plugin_build_mulaw(plug,
- &srcformat, &tmpformat,
- &plugin);
- break;
- default:
+ if (! rate_match(srcformat.rate, dstformat.rate) &&
+ ! snd_pcm_format_linear(srcformat.format)) {
+ if (srcformat.format != SNDRV_PCM_FORMAT_MU_LAW)
return -EINVAL;
- }
- pdprintf("format change: src=%i, dst=%i returns %i\n", srcformat.format, tmpformat.format, err);
+ tmpformat.format = SNDRV_PCM_FORMAT_S16;
+ err = snd_pcm_plugin_build_mulaw(plug,
+ &srcformat, &tmpformat,
+ &plugin);
if (err < 0)
return err;
err = snd_pcm_plugin_append(plugin);
/* channels reduction */
if (srcformat.channels > dstformat.channels) {
- int sv = srcformat.channels;
- int dv = dstformat.channels;
- route_ttable_entry_t *ttable = kcalloc(dv * sv, sizeof(*ttable), GFP_KERNEL);
- if (ttable == NULL)
- return -ENOMEM;
-#if 1
- if (sv == 2 && dv == 1) {
- ttable[0] = HALF;
- ttable[1] = HALF;
- } else
-#endif
- {
- int v;
- for (v = 0; v < dv; ++v)
- ttable[v * sv + v] = FULL;
- }
tmpformat.channels = dstformat.channels;
- if (rate_match(srcformat.rate, dstformat.rate) &&
- snd_pcm_format_linear(dstformat.format))
- tmpformat.format = dstformat.format;
- err = snd_pcm_plugin_build_route(plug,
- &srcformat, &tmpformat,
- ttable, &plugin);
- kfree(ttable);
+ err = snd_pcm_plugin_build_route(plug, &srcformat, &tmpformat, &plugin);
pdprintf("channels reduction: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err);
- if (err < 0) {
- snd_pcm_plugin_free(plugin);
+ if (err < 0)
return err;
- }
err = snd_pcm_plugin_append(plugin);
if (err < 0) {
snd_pcm_plugin_free(plugin);
/* rate resampling */
if (!rate_match(srcformat.rate, dstformat.rate)) {
+ if (srcformat.format != SNDRV_PCM_FORMAT_S16) {
+ /* convert to S16 for resampling */
+ tmpformat.format = SNDRV_PCM_FORMAT_S16;
+ err = snd_pcm_plugin_build_linear(plug,
+ &srcformat, &tmpformat,
+ &plugin);
+ if (err < 0)
+ return err;
+ err = snd_pcm_plugin_append(plugin);
+ if (err < 0) {
+ snd_pcm_plugin_free(plugin);
+ return err;
+ }
+ srcformat = tmpformat;
+ src_access = dst_access;
+ }
tmpformat.rate = dstformat.rate;
- if (srcformat.channels == dstformat.channels &&
- snd_pcm_format_linear(dstformat.format))
- tmpformat.format = dstformat.format;
err = snd_pcm_plugin_build_rate(plug,
&srcformat, &tmpformat,
&plugin);
pdprintf("rate down resampling: src=%i, dst=%i returns %i\n", srcformat.rate, tmpformat.rate, err);
- if (err < 0) {
- snd_pcm_plugin_free(plugin);
+ if (err < 0)
return err;
- }
err = snd_pcm_plugin_append(plugin);
if (err < 0) {
snd_pcm_plugin_free(plugin);
src_access = dst_access;
}
- /* channels extension */
- if (srcformat.channels < dstformat.channels) {
- int sv = srcformat.channels;
- int dv = dstformat.channels;
- route_ttable_entry_t *ttable = kcalloc(dv * sv, sizeof(*ttable), GFP_KERNEL);
- if (ttable == NULL)
- return -ENOMEM;
-#if 0
- {
- int v;
- for (v = 0; v < sv; ++v)
- ttable[v * sv + v] = FULL;
- }
-#else
- {
- /* Playback is spreaded on all channels */
- int vd, vs;
- for (vd = 0, vs = 0; vd < dv; ++vd) {
- ttable[vd * sv + vs] = FULL;
- vs++;
- if (vs == sv)
- vs = 0;
- }
- }
-#endif
- tmpformat.channels = dstformat.channels;
- if (snd_pcm_format_linear(dstformat.format))
- tmpformat.format = dstformat.format;
- err = snd_pcm_plugin_build_route(plug,
- &srcformat, &tmpformat,
- ttable, &plugin);
- kfree(ttable);
- pdprintf("channels extension: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err);
- if (err < 0) {
- snd_pcm_plugin_free(plugin);
- return err;
- }
- err = snd_pcm_plugin_append(plugin);
- if (err < 0) {
- snd_pcm_plugin_free(plugin);
- return err;
- }
- srcformat = tmpformat;
- src_access = dst_access;
- }
-
/* format change */
if (srcformat.format != dstformat.format) {
tmpformat.format = dstformat.format;
- if (tmpformat.format == SNDRV_PCM_FORMAT_MU_LAW) {
+ if (srcformat.format == SNDRV_PCM_FORMAT_MU_LAW ||
+ tmpformat.format == SNDRV_PCM_FORMAT_MU_LAW) {
err = snd_pcm_plugin_build_mulaw(plug,
&srcformat, &tmpformat,
&plugin);
src_access = dst_access;
}
+ /* channels extension */
+ if (srcformat.channels < dstformat.channels) {
+ tmpformat.channels = dstformat.channels;
+ err = snd_pcm_plugin_build_route(plug, &srcformat, &tmpformat, &plugin);
+ pdprintf("channels extension: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err);
+ if (err < 0)
+ return err;
+ err = snd_pcm_plugin_append(plugin);
+ if (err < 0) {
+ snd_pcm_plugin_free(plugin);
+ return err;
+ }
+ srcformat = tmpformat;
+ src_access = dst_access;
+ }
+
/* de-interleave */
if (src_access != dst_access) {
err = snd_pcm_plugin_build_copy(plug,
return 0;
}
-snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(snd_pcm_plug_t *plug,
+snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *plug,
char *buf,
snd_pcm_uframes_t count,
- snd_pcm_plugin_channel_t **channels)
+ struct snd_pcm_plugin_channel **channels)
{
- snd_pcm_plugin_t *plugin;
- snd_pcm_plugin_channel_t *v;
- snd_pcm_plugin_format_t *format;
+ struct snd_pcm_plugin *plugin;
+ struct snd_pcm_plugin_channel *v;
+ struct snd_pcm_plugin_format *format;
int width, nchannels, channel;
int stream = snd_pcm_plug_stream(plug);
return count;
}
-static int snd_pcm_plug_playback_channels_mask(snd_pcm_plug_t *plug,
- bitset_t *client_vmask)
+snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *plug, struct snd_pcm_plugin_channel *src_channels, snd_pcm_uframes_t size)
{
- snd_pcm_plugin_t *plugin = snd_pcm_plug_last(plug);
- if (plugin == NULL) {
- return 0;
- } else {
- int schannels = plugin->dst_format.channels;
- bitset_t bs[bitset_size(schannels)];
- bitset_t *srcmask;
- bitset_t *dstmask = bs;
- int err;
- bitset_one(dstmask, schannels);
-
- while (1) {
- err = plugin->src_channels_mask(plugin, dstmask, &srcmask);
- if (err < 0)
- return err;
- dstmask = srcmask;
- if (plugin->prev == NULL)
- break;
- plugin = plugin->prev;
- }
- bitset_and(client_vmask, dstmask, plugin->src_format.channels);
- return 0;
- }
-}
-
-static int snd_pcm_plug_playback_disable_useless_channels(snd_pcm_plug_t *plug,
- snd_pcm_plugin_channel_t *src_channels)
-{
- snd_pcm_plugin_t *plugin = snd_pcm_plug_first(plug);
- unsigned int nchannels = plugin->src_format.channels;
- bitset_t bs[bitset_size(nchannels)];
- bitset_t *srcmask = bs;
- int err;
- unsigned int channel;
- for (channel = 0; channel < nchannels; channel++) {
- if (src_channels[channel].enabled)
- bitset_set(srcmask, channel);
- else
- bitset_reset(srcmask, channel);
- }
- err = snd_pcm_plug_playback_channels_mask(plug, srcmask);
- if (err < 0)
- return err;
- for (channel = 0; channel < nchannels; channel++) {
- if (!bitset_get(srcmask, channel))
- src_channels[channel].enabled = 0;
- }
- return 0;
-}
-
-static int snd_pcm_plug_capture_disable_useless_channels(snd_pcm_plug_t *plug,
- snd_pcm_plugin_channel_t *src_channels,
- snd_pcm_plugin_channel_t *client_channels)
-{
- snd_pcm_plugin_t *plugin = snd_pcm_plug_last(plug);
- unsigned int nchannels = plugin->dst_format.channels;
- bitset_t bs[bitset_size(nchannels)];
- bitset_t *dstmask = bs;
- bitset_t *srcmask;
- int err;
- unsigned int channel;
- for (channel = 0; channel < nchannels; channel++) {
- if (client_channels[channel].enabled)
- bitset_set(dstmask, channel);
- else
- bitset_reset(dstmask, channel);
- }
- while (plugin) {
- err = plugin->src_channels_mask(plugin, dstmask, &srcmask);
- if (err < 0)
- return err;
- dstmask = srcmask;
- plugin = plugin->prev;
- }
- plugin = snd_pcm_plug_first(plug);
- nchannels = plugin->src_format.channels;
- for (channel = 0; channel < nchannels; channel++) {
- if (!bitset_get(dstmask, channel))
- src_channels[channel].enabled = 0;
- }
- return 0;
-}
-
-snd_pcm_sframes_t snd_pcm_plug_write_transfer(snd_pcm_plug_t *plug, snd_pcm_plugin_channel_t *src_channels, snd_pcm_uframes_t size)
-{
- snd_pcm_plugin_t *plugin, *next;
- snd_pcm_plugin_channel_t *dst_channels;
+ struct snd_pcm_plugin *plugin, *next;
+ struct snd_pcm_plugin_channel *dst_channels;
int err;
snd_pcm_sframes_t frames = size;
- if ((err = snd_pcm_plug_playback_disable_useless_channels(plug, src_channels)) < 0)
- return err;
-
plugin = snd_pcm_plug_first(plug);
while (plugin && frames > 0) {
if ((next = plugin->next) != NULL) {
return snd_pcm_plug_client_size(plug, frames);
}
-snd_pcm_sframes_t snd_pcm_plug_read_transfer(snd_pcm_plug_t *plug, snd_pcm_plugin_channel_t *dst_channels_final, snd_pcm_uframes_t size)
+snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *plug, struct snd_pcm_plugin_channel *dst_channels_final, snd_pcm_uframes_t size)
{
- snd_pcm_plugin_t *plugin, *next;
- snd_pcm_plugin_channel_t *src_channels, *dst_channels;
+ struct snd_pcm_plugin *plugin, *next;
+ struct snd_pcm_plugin_channel *src_channels, *dst_channels;
snd_pcm_sframes_t frames = size;
int err;
return err;
}
frames = err;
- if (!plugin->prev) {
- if ((err = snd_pcm_plug_capture_disable_useless_channels(plug, dst_channels, dst_channels_final)) < 0)
- return err;
- }
} else {
dst_channels = dst_channels_final;
}
return frames;
}
-int snd_pcm_area_silence(const snd_pcm_channel_area_t *dst_area, size_t dst_offset,
+int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_area, size_t dst_offset,
size_t samples, int format)
{
/* FIXME: sub byte resolution and odd dst_offset */
return 0;
}
-int snd_pcm_area_copy(const snd_pcm_channel_area_t *src_area, size_t src_offset,
- const snd_pcm_channel_area_t *dst_area, size_t dst_offset,
+int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_area, size_t src_offset,
+ const struct snd_pcm_channel_area *dst_area, size_t dst_offset,
size_t samples, int format)
{
/* FIXME: sub byte resolution and odd dst_offset */
projects / linux-2.6 / blobdiff