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Disallow variable number of channels

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This commit is contained in:
Ali 2021-07-16 00:22:30 +02:00
parent 32eddbe1f3
commit 15c0340eaf
1 changed files with 8 additions and 0 deletions
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8
submodules/FFMpegBinding/Sources/FFMpegSWResample.m
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@ -6,6 +6,7 @@
#import "libswresample/swresample.h"
@interface FFMpegSWResample () {
int _sourceChannelCount;
SwrContext *_context;
NSUInteger _ratio;
NSInteger _destinationChannelCount;
@ -21,6 +22,7 @@
- (instancetype)initWithSourceChannelCount:(NSInteger)sourceChannelCount sourceSampleRate:(NSInteger)sourceSampleRate sourceSampleFormat:(enum FFMpegAVSampleFormat)sourceSampleFormat destinationChannelCount:(NSInteger)destinationChannelCount destinationSampleRate:(NSInteger)destinationSampleRate destinationSampleFormat:(enum FFMpegAVSampleFormat)destinationSampleFormat {
self = [super init];
if (self != nil) {
_sourceChannelCount = sourceChannelCount;
_destinationChannelCount = destinationChannelCount;
_destinationSampleFormat = destinationSampleFormat;
_context = swr_alloc_set_opts(NULL,
@ -47,6 +49,12 @@
- (NSData * _Nullable)resample:(FFMpegAVFrame *)frame {
AVFrame *frameImpl = (AVFrame *)[frame impl];
int numChannels = frameImpl->channels;
if (numChannels != _sourceChannelCount) {
return nil;
}
int bufSize = av_samples_get_buffer_size(NULL,
(int)_destinationChannelCount,
frameImpl->nb_samples * (int)_ratio,