aout: add callback for get persecond audio callbacks

ijkmedia/ijkplayer/ff_ffplay.c

@@ -2129,7 +2129,7 @@ static int audio_open(FFPlayer *opaque, int64_t wanted_channel_layout, int wante
         next_sample_rate_idx--;
     wanted_spec.format = AUDIO_S16SYS;
     wanted_spec.silence = 0;
-    wanted_spec.samples = FFMAX(SDL_AUDIO_MIN_BUFFER_SIZE, 2 << av_log2(wanted_spec.freq / SDL_AUDIO_MAX_CALLBACKS_PER_SEC));
+    wanted_spec.samples = FFMAX(SDL_AUDIO_MIN_BUFFER_SIZE, 2 << av_log2(wanted_spec.freq / SDL_AoutGetAudioPerSecondCallBacks(ffp->aout)));
     wanted_spec.callback = sdl_audio_callback;
     wanted_spec.userdata = opaque;
     while (SDL_AoutOpenAudio(ffp->aout, &wanted_spec, &spec) < 0) {

ijkmedia/ijksdl/ijksdl_aout.c

@@ -23,6 +23,7 @@
 
 #include "ijksdl_aout.h"
 #include <stdlib.h>
+#include "ff_ffplay_def.h"
 
 int SDL_AoutOpenAudio(SDL_Aout *aout, const SDL_AudioSpec *desired, SDL_AudioSpec *obtained)
 {
@@ -114,3 +115,12 @@ int SDL_AoutGetAudioSessionId(SDL_Aout *aout)
     return 0;
 }
 
+int SDL_AoutGetAudioPerSecondCallBacks(SDL_Aout *aout)
+{
+    if (aout) {
+        if (aout->func_get_audio_persecond_callbacks) {
+            return aout->func_get_audio_persecond_callbacks(aout);
+        }
+    }
+    return SDL_AUDIO_MAX_CALLBACKS_PER_SEC;
+}

ijkmedia/ijksdl/ijksdl_aout.h

@@ -48,6 +48,7 @@ struct SDL_Aout {
 
     // optional
     void   (*func_set_playback_rate)(SDL_Aout *aout, float playbackRate);
+    int    (*func_get_audio_persecond_callbacks)(SDL_Aout *aout);
 
     // Android only
     int    (*func_get_audio_session_id)(SDL_Aout *aout);
@@ -63,6 +64,7 @@ void SDL_AoutFreeP(SDL_Aout **paout);
 
 double SDL_AoutGetLatencySeconds(SDL_Aout *aout);
 void   SDL_AoutSetDefaultLatencySeconds(SDL_Aout *aout, double latency);
+int    SDL_AoutGetAudioPerSecondCallBacks(SDL_Aout *aout);
 
 // optional
 void   SDL_AoutSetPlaybackRate(SDL_Aout *aout, float playbackRate);