Fixes in AlsaPcmOutputStream.

media/audio/linux/alsa_wrapper.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/audio/linux/alsa_wrapper.h"
 
 #include <alsa/asoundlib.h>
 
 AlsaWrapper::AlsaWrapper() {
 }
@@ skipping 49 matching lines @@
 }
 
 int AlsaWrapper::PcmSetParams(snd_pcm_t* handle, snd_pcm_format_t format,
                               snd_pcm_access_t access, unsigned int channels,
                               unsigned int rate, int soft_resample,
                               unsigned int latency) {
   return snd_pcm_set_params(handle, format, access, channels, rate,
                             soft_resample, latency);
 }
 
+int AlsaWrapper::PcmGetParams(snd_pcm_t* handle, snd_pcm_uframes_t* buffer_size,
+                              snd_pcm_uframes_t* period_size) {
+  return snd_pcm_get_params(handle, buffer_size, period_size);
+}
+
 snd_pcm_sframes_t AlsaWrapper::PcmAvailUpdate(snd_pcm_t* handle) {
   return snd_pcm_avail_update(handle);
 }
 
 snd_pcm_state_t AlsaWrapper::PcmState(snd_pcm_t* handle) {
   return snd_pcm_state(handle);
 }
 
 const char* AlsaWrapper::StrError(int errnum) {
   return snd_strerror(errnum);
 }