Change hw_stream to not be const

In preparation for allowing to overwrite a stream's card and device
numbers, change hw_stream member and related function to not be const.

Signed-off-by: Vincent Knecht <vincent.knecht@mailoo.org>

Author: vknecht

audio/audio_hw.c

@@ -126,7 +126,7 @@ struct stream_out_common {
 
     out_close_fn    close;
     struct audio_device *dev;
-    const struct hw_stream *hw;
+    struct hw_stream *hw;
 
     pthread_mutex_t lock;
 
@@ -203,7 +203,7 @@ struct stream_in_common {
 
     in_close_fn    close;
     struct audio_device *dev;
-    const struct hw_stream *hw;
+    struct hw_stream *hw;
 
     pthread_mutex_t lock;
 
@@ -1876,7 +1876,7 @@ static int change_input_source_locked(struct stream_in_pcm *in, const char *valu
 {
     struct audio_config config;
     const char *stream_name;
-    const struct hw_stream *hw = NULL;
+    struct hw_stream *hw = NULL;
     const int new_source = atoi(value);
 
     *was_changed = false;
@@ -2159,7 +2159,7 @@ static int adev_open_output_stream_v3(struct audio_hw_device *dev,
           config->format, config->channel_mask, config->sample_rate, flags);
 
     devices &= AUDIO_DEVICE_OUT_ALL;
-    const struct hw_stream *hw = get_stream(adev->cm, devices, flags, config);
+    struct hw_stream *hw = get_stream(adev->cm, devices, flags, config);
     if (!hw) {
         ALOGE("No suitable output stream for devices=0x%x flags=0x%x format=0x%x",
               devices, flags, config->format);
@@ -2257,7 +2257,7 @@ static int adev_open_input_stream_v3(struct audio_hw_device *dev,
     *stream_in = NULL;
 
     devices &= AUDIO_DEVICE_IN_ALL;
-    const struct hw_stream *hw = get_stream(adev->cm, devices, 0, config);
+    struct hw_stream *hw = get_stream(adev->cm, devices, 0, config);
     if (!hw) {
         ALOGE("No suitable input stream for devices=0x%x flags=0x%x format=0x%x",
               devices, flags, config->format);

configmgr/audio_config.c

@@ -865,7 +865,7 @@ static bool open_stream_l(struct config_mgr *cm, struct stream *s)
     }
 }
 
-const struct hw_stream *get_stream(struct config_mgr *cm,
+struct hw_stream *get_stream(struct config_mgr *cm,
                                    const audio_devices_t devices,
                                    const audio_output_flags_t flags,
                                    const struct audio_config *config )
@@ -909,7 +909,7 @@ const struct hw_stream *get_stream(struct config_mgr *cm,
     }
 }
 
-const struct hw_stream *get_named_stream(struct config_mgr *cm,
+struct hw_stream *get_named_stream(struct config_mgr *cm,
                                    const char *name)
 {
     struct stream *s;

include/tinyhal/audio_config.h

@@ -130,13 +130,13 @@ uint32_t get_supported_output_devices( struct config_mgr *cm );
  * Note that this only considers unnamed streams (those without a 'name'
  * attribute). For named streams use get_named_stream().
  */
-const struct hw_stream *get_stream(  struct config_mgr *cm,
+struct hw_stream *get_stream(  struct config_mgr *cm,
                                         const audio_devices_t devices,
                                         const audio_output_flags_t flags,
                                         const struct audio_config *config );
 
 /** Find a named custom stream and return a pointer to it */
-const struct hw_stream *get_named_stream(struct config_mgr *cm,
+struct hw_stream *get_named_stream(struct config_mgr *cm,
                                    const char *name);
 
 /** Return the value of a constant defined by a <set> element as a string