demux: mp4: fix grouped compressed samples reading (fix #11601)

modules/demux/mp4/mp4.c

@@ -3359,7 +3359,6 @@ static uint32_t MP4_TrackGetReadSize( mp4_track_t *p_track, uint32_t *pi_nb_samp
         const MP4_Box_data_sample_soun_t *p_soun = p_track->p_sample->data.p_sample_soun;
         const mp4_chunk_t *p_chunk = &p_track->chunk[p_track->i_chunk];
         uint32_t i_max_samples = p_chunk->i_sample_count - p_chunk->i_sample + 1;
-        i_max_samples = __MIN( i_max_samples, QT_V0_MAX_SAMPLES );
 
         /* Group audio packets so we don't call demux for single sample unit */
         if( p_track->fmt.i_original_fourcc == VLC_CODEC_DVD_LPCM &&
@@ -3383,12 +3382,15 @@ static uint32_t MP4_TrackGetReadSize( mp4_track_t *p_track, uint32_t *pi_nb_samp
 
         if( p_soun->i_qt_version == 1 )
         {
-            if ( p_soun->i_compressionid != 0 )
+            if ( p_soun->i_compressionid != 0 || p_soun->i_bytes_per_sample > 1 ) /* compressed */
             {
                 /* in this case we are dealing with compressed data
                    -2 in V1: additional fields are meaningless (VBR and such) */
-                i_size = p_track->i_sample_size;
-                *pi_nb_samples = 1;
+                *pi_nb_samples = i_max_samples;//p_track->chunk[p_track->i_chunk].i_sample_count;
+                if( p_track->fmt.audio.i_blockalign > 1 )
+                    *pi_nb_samples = p_soun->i_sample_per_packet;
+                i_size = *pi_nb_samples / p_soun->i_sample_per_packet * p_soun->i_bytes_per_frame;
+                return i_size;
             }
             else /* uncompressed case */
             {
@@ -3403,10 +3405,11 @@ static uint32_t MP4_TrackGetReadSize( mp4_track_t *p_track, uint32_t *pi_nb_samp
 
                 *pi_nb_samples = i_packets * p_soun->i_sample_per_packet;
                 i_size = i_packets * p_soun->i_bytes_per_frame;
+                return i_size;
             }
         }
 
-        /* uncompressed */
+        /* uncompressed v0 */
         *pi_nb_samples = 0;
         for( uint32_t i=p_track->i_sample;
              i<p_chunk->i_sample_first+p_chunk->i_sample_count &&