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avcodec/videotoolbox: fix kVTCouldNotFindVideoDecoderErr trying to decode HEVC on iOS 

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>
This commit is contained in:
Aman Gupta 2018-04-19 15:34:01 -07:00
parent 84e03db9a3
commit bcff983dc3
1 changed files with 6 additions and 1 deletions
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7
libavcodec/videotoolbox.c
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@ -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;