audio_output/amem.c: change "audio-delay" when amem-delay is set

Change audio-delay on when amem-delay is set. At the same time fix
a few bugs:
- free(aout->output.p_sys->psz_name);
- in windows code

modules/audio_output/amem.c

@@ -35,6 +35,8 @@
 #include <vlc_es.h>
 #include <vlc_aout.h>
 
+#include <vlc_playlist.h> /* changing audio delay */
+
 #if defined(_WIN32_WINNT) || defined(WIN32)
 # include <windows.h>
 # include <conio.h>
@@ -124,8 +126,6 @@ typedef struct
 /* Private structure */
 struct aout_sys_t
 {
-    int      i_delay;
-
 #if defined(_WIN32_WINNT) || defined(WIN32)
     HANDLE   handle;
 #else
@@ -384,7 +384,8 @@ static void amem_shmem_close(aout_instance_t *aout)
         amem_sem_destroy(&sys->header->sem);
 
 #if defined(_WIN32_WINNT) || defined(WIN32)
-    UnmapViewOfFile(sys->header);
+    if (sys->header)
+        UnmapViewOfFile(sys->header);
     CloseHandle(sys->handle);
 #else
     /* Determine shared memory size */
@@ -418,10 +419,11 @@ static void amem_shmem_header(aout_instance_t *aout)
     fourcc_to_wf_tag(aout->output.output.i_format, &tag);
     header->wave.wFormatTag = tag;
     header->wave.nChannels = aout->output.output.i_channels;
-    header->wave.nSamplesPerSec = aout->output.output.i_rate * aout->output.i_nb_samples;
-    //header->wave.nAvgBytesPerSec = ;
-    header->wave.nBlockAlign = aout->output.output.i_blockalign;
-    header->wave.wBitsPerSample = aout->output.output.i_bitspersample;
+    header->wave.nSamplesPerSec = header->i_rate * header->i_max_samples;
+    header->wave.wBitsPerSample = header->i_bitspersample;
+    //header->wave.nBlockAlign = header->i_blockalign;
+    header->wave.nBlockAlign = header->wave.wBitsPerSample / 8 * header->wave.nChannels;
+    header->wave.nAvgBytesPerSec = header->wave.nSamplesPerSec * header->wave.nBlockAlign;
     header->wave.cbSize = 0; /* No additional format metadata */
 #else
     header->i_format = aout->output.output.i_format;
@@ -519,7 +521,7 @@ vlc_module_begin()
         change_integer_range( 0, CHANNELS_MAX )
     add_integer( AMEM_CFG_PREFIX "samplerate", 44100, NULL, ARATE_TEXT,
                  ARATE_LONGTEXT, true )
-    add_integer( AMEM_CFG_PREFIX "delay", 0, NULL, ADELAY_TEXT,
+    add_integer( AMEM_CFG_PREFIX "delay", -1, NULL, ADELAY_TEXT,
                  ADELAY_TEXT, true )
 
     set_callbacks(Open, Close)
@@ -553,9 +555,6 @@ static int Open(vlc_object_t *p_this)
     /* Audio sample rate */
     aout->output.output.i_rate = var_CreateGetInteger(p_this, AMEM_CFG_PREFIX "samplerate");
 
-    /* Audio output delay */
-    sys->i_delay = var_CreateGetInteger(p_this, AMEM_CFG_PREFIX "delay");
-
     /* Audio format */
     psz_format = var_CreateGetString(p_this, AMEM_CFG_PREFIX "format");
 
@@ -570,8 +569,8 @@ static int Open(vlc_object_t *p_this)
 
     if (*ppsz_compare == NULL)
     {
-        msg_Err(aout, "cannot understand the format string (%s)",
-                psz_format);
+        msg_Err(aout, "cannot understand the format string (%s)", psz_format);
+        free(aout->output.p_sys->psz_name);
         free(aout->output.p_sys);
         free(psz_format);
         return VLC_EGENERIC;
@@ -600,13 +599,35 @@ static int Open(vlc_object_t *p_this)
             pi_channels_maps[i_channels];
     }
 
+    /* Audio output buffers */
     int i_buffers = var_CreateGetInteger(aout, AMEM_CFG_PREFIX "buffers");
     if (i_buffers < 1)
     {
         msg_Err(aout, "insufficient shared audio buffers requested");
+        free(aout->output.p_sys->psz_name);
+        free(aout->output.p_sys);
         return VLC_EGENERIC;
     }
 
+    /* Audio output delay */
+    int64_t i_delay = var_CreateGetInteger(aout, AMEM_CFG_PREFIX "delay");
+    if (i_delay >= 0)
+    {
+        playlist_t *p_playlist = pl_Get(aout);
+
+        /* Update the input */
+        input_thread_t *p_input = playlist_CurrentInput(p_playlist);
+        if (p_input == NULL)
+        {
+            free(aout->output.p_sys->psz_name);
+            free(aout->output.p_sys);
+            return VLC_EGENERIC;
+        }
+        if (var_GetTime(p_input, "audio-delay") != i_delay)
+            var_SetTime(p_input, "audio-delay", i_delay);
+        vlc_object_release(p_input);
+    }
+
     /* Setup shared memory connection */
     if (SetupSharedMem(aout, i_buffers) != VLC_SUCCESS)
     {