ijkplayer: add interface for setting playback volume

ijkmedia/ijkplayer/ff_ffmsg.h

@@ -50,6 +50,7 @@
 #define FFP_PROP_FLOAT_VIDEO_DECODE_FRAMES_PER_SECOND   10001
 #define FFP_PROP_FLOAT_VIDEO_OUTPUT_FRAMES_PER_SECOND   10002
 #define FFP_PROP_FLOAT_PLAYBACK_RATE                    10003
+#define FFP_PROP_FLOAT_PLAYBACK_VOLUME                  10006
 #define FFP_PROP_FLOAT_AVDELAY                          10004
 #define FFP_PROP_FLOAT_AVDIFF                           10005
 

ijkmedia/ijkplayer/ff_ffplay.c

@@ -2013,6 +2013,10 @@ static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
         ffp->pf_playback_rate_changed = 0;
         SDL_AoutSetPlaybackRate(ffp->aout, ffp->pf_playback_rate);
     }
+    if (ffp->pf_playback_volume_changed) {
+        ffp->pf_playback_volume_changed = 0;
+        SDL_AoutSetPlaybackVolume(ffp->aout, ffp->pf_playback_volume);
+    }
 
     while (len > 0) {
         if (is->audio_buf_index >= is->audio_buf_size) {
@@ -3917,6 +3921,14 @@ void ffp_set_playback_rate(FFPlayer *ffp, float rate)
     ffp->pf_playback_rate_changed = 1;
 }
 
+void ffp_set_playback_volume(FFPlayer *ffp, float volume)
+{
+    if (!ffp)
+        return;
+    ffp->pf_playback_volume = volume;
+    ffp->pf_playback_volume_changed = 1;
+}
+
 int ffp_get_video_rotate_degrees(FFPlayer *ffp)
 {
     VideoState *is = ffp->is;
@@ -4006,6 +4018,8 @@ float ffp_get_property_float(FFPlayer *ffp, int id, float default_value)
             return ffp ? ffp->stat.avdelay : default_value;
         case FFP_PROP_FLOAT_AVDIFF:
             return ffp ? ffp->stat.avdiff : default_value;
+        case FFP_PROP_FLOAT_PLAYBACK_VOLUME:
+            return ffp ? ffp->pf_playback_volume : default_value;
         default:
             return default_value;
     }
@@ -4016,6 +4030,10 @@ void ffp_set_property_float(FFPlayer *ffp, int id, float value)
     switch (id) {
         case FFP_PROP_FLOAT_PLAYBACK_RATE:
             ffp_set_playback_rate(ffp, value);
+            break;
+        case FFP_PROP_FLOAT_PLAYBACK_VOLUME:
+            ffp_set_playback_volume(ffp, value);
+            break;
         default:
             return;
     }

ijkmedia/ijkplayer/ff_ffplay.h

@@ -102,6 +102,7 @@ void      ffp_set_video_codec_info(FFPlayer *ffp, const char *module, const char
 void      ffp_set_audio_codec_info(FFPlayer *ffp, const char *module, const char *codec);
 
 void      ffp_set_playback_rate(FFPlayer *ffp, float rate);
+void      ffp_set_playback_volume(FFPlayer *ffp, float volume);
 int       ffp_get_video_rotate_degrees(FFPlayer *ffp);
 int       ffp_set_stream_selected(FFPlayer *ffp, int stream, int selected);
 

ijkmedia/ijkplayer/ff_ffplay_def.h

@@ -656,6 +656,8 @@ typedef struct FFPlayer {
     int         af_changed;
     float       pf_playback_rate;
     int         pf_playback_rate_changed;
+    float       pf_playback_volume;
+    int         pf_playback_volume_changed;
 
     void               *inject_opaque;
     FFStatistic         stat;
@@ -773,6 +775,8 @@ inline static void ffp_reset_internal(FFPlayer *ffp)
     ffp->af_changed                     = 0;
     ffp->pf_playback_rate               = 1.0f;
     ffp->pf_playback_rate_changed       = 0;
+    ffp->pf_playback_volume             = 1.0f;
+    ffp->pf_playback_volume_changed     = 0;
 
     av_application_closep(&ffp->app_ctx);
 

ijkmedia/ijkplayer/ijkplayer.c

@@ -202,6 +202,17 @@ void ijkmp_set_playback_rate(IjkMediaPlayer *mp, float rate)
     MPTRACE("%s()=void\n", __func__);
 }
 
+void ijkmp_set_playback_volume(IjkMediaPlayer *mp, float volume)
+{
+    assert(mp);
+
+    MPTRACE("%s(%f)\n", __func__, volume);
+    pthread_mutex_lock(&mp->mutex);
+    ffp_set_playback_volume(mp->ffplayer, volume);
+    pthread_mutex_unlock(&mp->mutex);
+    MPTRACE("%s()=void\n", __func__);
+}
+
 int ijkmp_set_stream_selected(IjkMediaPlayer *mp, int stream, int selected)
 {
     assert(mp);

ijkmedia/ijkplayer/ijkplayer.h

@@ -171,6 +171,8 @@ void            ijkmp_set_option_int(IjkMediaPlayer *mp, int opt_category, const
 int             ijkmp_get_video_codec_info(IjkMediaPlayer *mp, char **codec_info);
 int             ijkmp_get_audio_codec_info(IjkMediaPlayer *mp, char **codec_info);
 void            ijkmp_set_playback_rate(IjkMediaPlayer *mp, float rate);
+void            ijkmp_set_playback_volume(IjkMediaPlayer *mp, float rate);
+
 int             ijkmp_set_stream_selected(IjkMediaPlayer *mp, int stream, int selected);
 
 float           ijkmp_get_property_float(IjkMediaPlayer *mp, int id, float default_value);

ijkmedia/ijksdl/ijksdl_aout.c

@@ -105,6 +105,14 @@ void SDL_AoutSetPlaybackRate(SDL_Aout *aout, float playbackRate)
     }
 }
 
+void SDL_AoutSetPlaybackVolume(SDL_Aout *aout, float volume)
+{
+    if (aout) {
+        if (aout->func_set_playback_volume)
+            aout->func_set_playback_volume(aout, volume);
+    }
+}
+
 int SDL_AoutGetAudioSessionId(SDL_Aout *aout)
 {
     if (aout) {

ijkmedia/ijksdl/ijksdl_aout.h

@@ -48,6 +48,7 @@ struct SDL_Aout {
 
     // optional
     void   (*func_set_playback_rate)(SDL_Aout *aout, float playbackRate);
+    void   (*func_set_playback_volume)(SDL_Aout *aout, float playbackVolume);
     int    (*func_get_audio_persecond_callbacks)(SDL_Aout *aout);
 
     // Android only
@@ -68,6 +69,7 @@ int    SDL_AoutGetAudioPerSecondCallBacks(SDL_Aout *aout);
 
 // optional
 void   SDL_AoutSetPlaybackRate(SDL_Aout *aout, float playbackRate);
+void   SDL_AoutSetPlaybackVolume(SDL_Aout *aout, float volume);
 
 // android only
 int    SDL_AoutGetAudioSessionId(SDL_Aout *aout);