avcodec/videotoolbox: fix kVTCouldNotFindVideoDecoderErr trying to decode HEVC on iOS
authorAman Gupta <aman@tmm1.net>
Thu, 19 Apr 2018 22:34:01 +0000 (15:34 -0700)
committerAman Gupta <aman@tmm1.net>
Sat, 5 May 2018 01:24:49 +0000 (18:24 -0700)
Older iOS devices don't have a hardware HEVC decoder, but the
software decoder offered by VideoToolbox is well-optimized and
performs much better than the ffmpeg decoder.

Signed-off-by: Aman Gupta <aman@tmm1.net>
libavcodec/videotoolbox.c

index 6dd800d..8671608 100644 (file)
@@ -36,6 +36,9 @@
 #ifndef kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder
 #  define kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder CFSTR("RequireHardwareAcceleratedVideoDecoder")
 #endif
+#ifndef kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder
+#  define kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder CFSTR("EnableHardwareAcceleratedVideoDecoder")
+#endif
 
 #if !HAVE_KCMVIDEOCODECTYPE_HEVC
 enum { kCMVideoCodecType_HEVC = 'hvc1' };
@@ -709,7 +712,9 @@ static CFDictionaryRef videotoolbox_decoder_config_create(CMVideoCodecType codec
                                                                    &kCFTypeDictionaryValueCallBacks);
 
     CFDictionarySetValue(config_info,
-                         kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder,
+                         codec_type == kCMVideoCodecType_HEVC ?
+                            kVTVideoDecoderSpecification_EnableHardwareAcceleratedVideoDecoder :
+                            kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder,
                          kCFBooleanTrue);
 
     CFMutableDictionaryRef avc_info;