Simplify Alsa detection and drop support for alsa < 1.0.0 (out in 2003)

configure.ac

@@ -4173,29 +4173,7 @@ PKG_ENABLE_MODULES_VLC([PORTAUDIO], [], [portaudio-2.0], [Portaudio library supp
 dnl
 dnl  ALSA module
 dnl
-AC_ARG_ENABLE(alsa,
-  [  --enable-alsa           ALSA sound support for Linux (default enabled)])
-if test "${enable_alsa}" != "no"
-then
-  AC_CHECK_HEADER(alsa/asoundlib.h, AC_CHECK_LIB(asound, main, have_alsa="true", have_alsa="false"),have_alsa="false")
-  if test "${have_alsa}" = "true"
-  then
-    CFLAGS="${CFLAGS_save}"
-    AC_TRY_COMPILE([#define ALSA_PCM_NEW_HW_PARAMS_API
-                    #define ALSA_PCM_NEW_SW_PARAMS_API
-                    #include <alsa/asoundlib.h>],
-       [snd_pcm_hw_params_get_period_time(0,0,0);],
-        AC_DEFINE(HAVE_ALSA_NEW_API, 1, Define if ALSA is at least rc4))
-    VLC_ADD_PLUGIN([alsa])
-    VLC_ADD_LIBS([alsa],[-lasound -lm -ldl])
-    VLC_ADD_PLUGIN([access_alsa])
-    VLC_ADD_LIBS([access_alsa],[-lasound -lm -ldl])
-  else
-    if test "${enable_alsa}" = "yes"; then
-      AC_MSG_ERROR([Could not find ALSA development headers])
-    fi
-  fi
-fi
+PKG_ENABLE_MODULES_VLC([ALSA], [], [alsa >= 1.0.0], [Alsa sound support for linux], [auto])
 
 dnl
 dnl  win32 waveOut plugin

modules/audio_output/alsa.c

@@ -571,15 +571,9 @@ static int Open( vlc_object_t *p_this )
 
         /* Set rate. */
         i_old_rate = p_aout->output.output.i_rate;
-#ifdef HAVE_ALSA_NEW_API
         i_snd_rc = snd_pcm_hw_params_set_rate_near( p_sys->p_snd_pcm, p_hw,
                                                 &p_aout->output.output.i_rate,
                                                 NULL );
-#else
-        i_snd_rc = snd_pcm_hw_params_set_rate_near( p_sys->p_snd_pcm, p_hw,
-                                                p_aout->output.output.i_rate,
-                                                NULL );
-#endif
         if( i_snd_rc < 0 || p_aout->output.output.i_rate != i_old_rate )
         {
             msg_Warn( p_aout, "The rate %d Hz is not supported by your " \
@@ -588,13 +582,8 @@ static int Open( vlc_object_t *p_this )
         }
 
         /* Set period size. */
-#ifdef HAVE_ALSA_NEW_API
         if ( ( i_snd_rc = snd_pcm_hw_params_set_period_size_near( p_sys->p_snd_pcm,
                                     p_hw, &i_period_size, NULL ) ) < 0 )
-#else
-        if ( ( i_snd_rc = snd_pcm_hw_params_set_period_size_near( p_sys->p_snd_pcm,
-                                    p_hw, i_period_size, NULL ) ) < 0 )
-#endif
         {
             msg_Err( p_aout, "unable to set period size (%s)",
                          snd_strerror( i_snd_rc ) );
@@ -603,13 +592,8 @@ static int Open( vlc_object_t *p_this )
         p_aout->output.i_nb_samples = i_period_size;
 
 /* Set buffer size. */
-#ifdef HAVE_ALSA_NEW_API
         if ( ( i_snd_rc = snd_pcm_hw_params_set_buffer_size_near( p_sys->p_snd_pcm,
                                     p_hw, &i_buffer_size ) ) < 0 )
-#else
-        if ( ( i_snd_rc = snd_pcm_hw_params_set_buffer_size_near( p_sys->p_snd_pcm,
-                                    p_hw, i_buffer_size ) ) < 0 )
-#endif
         {
             msg_Err( p_aout, "unable to set buffer size (%s)",
                          snd_strerror( i_snd_rc ) );
@@ -637,13 +621,8 @@ static int Open( vlc_object_t *p_this )
         }
     }
 
-#ifdef HAVE_ALSA_NEW_API
     if( ( i_snd_rc = snd_pcm_hw_params_get_period_time( p_hw,
                                     &p_sys->i_period_time, NULL ) ) < 0 )
-#else
-    if( ( p_sys->i_period_time =
-                  (int)snd_pcm_hw_params_get_period_time( p_hw, NULL ) ) < 0 )
-#endif
     {
         msg_Err( p_aout, "unable to get period time (%s)",
                          snd_strerror( i_snd_rc ) );