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Avoided useless writev use

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This commit is contained in:
Abramo Bagnara 2000-04-13 11:45:39 +00:00
parent a2932a8f52
commit 2c07d4f1ea
2 changed files with 9 additions and 16 deletions
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12
src/pcm/plugin/block.c
View file

@ -57,9 +57,7 @@ static ssize_t block_transfer(snd_pcm_plugin_t *plugin,
if ((result = snd_pcm_plugin_src_samples_to_size(plugin, samples)) < 0) if ((result = snd_pcm_plugin_src_samples_to_size(plugin, samples)) < 0)
return result; return result;
if (plugin->src_format.interleave) { if (plugin->src_format.interleave) {
vec->iov_base = src_voices->addr; result = snd_pcm_write(plugin->handle, src_voices->addr, result);
vec->iov_len = result;
count = 1;
} else { } else {
count = plugin->src_format.voices; count = plugin->src_format.voices;
result /= count; result /= count;
@ -67,8 +65,8 @@ static ssize_t block_transfer(snd_pcm_plugin_t *plugin,
vec[voice].iov_base = src_voices[voice].addr; vec[voice].iov_base = src_voices[voice].addr;
vec[voice].iov_len = result; vec[voice].iov_len = result;
} }
}
result = snd_pcm_writev(plugin->handle, vec, count); result = snd_pcm_writev(plugin->handle, vec, count);
}
if (result < 0) if (result < 0)
return result; return result;
return snd_pcm_plugin_src_size_to_samples(plugin, result); return snd_pcm_plugin_src_size_to_samples(plugin, result);
@ -78,9 +76,7 @@ static ssize_t block_transfer(snd_pcm_plugin_t *plugin,
if ((result = snd_pcm_plugin_dst_samples_to_size(plugin, samples)) < 0) if ((result = snd_pcm_plugin_dst_samples_to_size(plugin, samples)) < 0)
return result; return result;
if (plugin->dst_format.interleave) { if (plugin->dst_format.interleave) {
vec->iov_base = dst_voices->addr; result = snd_pcm_read(plugin->handle, dst_voices->addr, result);
vec->iov_len = result;
count = 1;
} else { } else {
count = plugin->dst_format.voices; count = plugin->dst_format.voices;
result /= count; result /= count;
@ -88,8 +84,8 @@ static ssize_t block_transfer(snd_pcm_plugin_t *plugin,
vec[voice].iov_base = dst_voices[voice].addr; vec[voice].iov_base = dst_voices[voice].addr;
vec[voice].iov_len = result; vec[voice].iov_len = result;
} }
}
result = snd_pcm_readv(plugin->handle, vec, count); result = snd_pcm_readv(plugin->handle, vec, count);
}
return snd_pcm_plugin_dst_size_to_samples(plugin, result); return snd_pcm_plugin_dst_size_to_samples(plugin, result);
} else { } else {
return -EINVAL; return -EINVAL;

13
src/pcm/plugin/stream.c
View file

@ -57,9 +57,7 @@ static ssize_t stream_transfer(snd_pcm_plugin_t *plugin,
if ((result = snd_pcm_plugin_src_samples_to_size(plugin, samples)) < 0) if ((result = snd_pcm_plugin_src_samples_to_size(plugin, samples)) < 0)
return result; return result;
if (plugin->src_format.interleave) { if (plugin->src_format.interleave) {
vec->iov_base = src_voices->addr; result = snd_pcm_write(plugin->handle, src_voices->addr, result);
vec->iov_len = result;
count = 1;
} else { } else {
count = plugin->src_format.voices; count = plugin->src_format.voices;
result /= count; result /= count;
@ -67,8 +65,8 @@ static ssize_t stream_transfer(snd_pcm_plugin_t *plugin,
vec[voice].iov_base = src_voices[voice].addr; vec[voice].iov_base = src_voices[voice].addr;
vec[voice].iov_len = result; vec[voice].iov_len = result;
} }
}
result = snd_pcm_writev(plugin->handle, vec, count); result = snd_pcm_writev(plugin->handle, vec, count);
}
if (result < 0) if (result < 0)
return result; return result;
return snd_pcm_plugin_src_size_to_samples(plugin, result); return snd_pcm_plugin_src_size_to_samples(plugin, result);
@ -78,9 +76,8 @@ static ssize_t stream_transfer(snd_pcm_plugin_t *plugin,
if ((result = snd_pcm_plugin_dst_samples_to_size(plugin, samples)) < 0) if ((result = snd_pcm_plugin_dst_samples_to_size(plugin, samples)) < 0)
return result; return result;
if (plugin->dst_format.interleave) { if (plugin->dst_format.interleave) {
vec->iov_base = dst_voices->addr; result = snd_pcm_read(plugin->handle, dst_voices->addr, result);
vec->iov_len = result;
count = 1;
} else { } else {
count = plugin->dst_format.voices; count = plugin->dst_format.voices;
result /= count; result /= count;
@ -88,8 +85,8 @@ static ssize_t stream_transfer(snd_pcm_plugin_t *plugin,
vec[voice].iov_base = dst_voices[voice].addr; vec[voice].iov_base = dst_voices[voice].addr;
vec[voice].iov_len = result; vec[voice].iov_len = result;
} }
}
result = snd_pcm_readv(plugin->handle, vec, count); result = snd_pcm_readv(plugin->handle, vec, count);
}
return snd_pcm_plugin_dst_size_to_samples(plugin, result); return snd_pcm_plugin_dst_size_to_samples(plugin, result);
} else { } else {
return -EINVAL; return -EINVAL;