shithub: h264bsd

Info  •  Files  •  Log  •  Branches

Reset the decoder and input stream for each loop of ios. Added notes to README to indicate why it's a good idea.

--- a/README.md

+++ b/README.md

@@ -6,12 +6,19 @@

 The intention is to provide a simple H.264 decoder that can be easily invoked from [ffi](http://en.wikipedia.org/wiki/Foreign_function_interface) systems.

+## Implementation Notes

+

+Currently, the process of decoding data modifies the data. This has tripped me a a few times in the past, so others should be aware of it.

+

+The decoder only works nicely if it has a single consistent stream to deal with. If you want to change the width/height or restart the stream with a new access unit delimiter, it's better to shutdown and recreate a new decoder.

+

 ## Directories

 * *src* The modified source.

 * *test* Contains test data available for all platforms.

-* *win* Visual Studio project files for building.

+* *win* Visual Studio project files and test application.

 * *js* JavaScript version of the library created using [emscripten](http://emscripten.org/).

+* *ios* XCode project and objective-c wrapper classes.

 * *flex* ActionScript version of the library built using [CrossBridge](http://adobe-flash.github.io/crossbridge/).

 This project was heavily inspired by [Broadway.js](https://github.com/mbebenita/Broadway). Much love to them for pioneering the idea.

--- a/ios/test/h264bsd Test/ViewController.m

+++ b/ios/test/h264bsd Test/ViewController.m

@@ -125,7 +125,11 @@

         status = [self.decoder decode:self.videoData offset:self.offset length:length bytesRead:&bytesRead];

         self.offset += bytesRead;

-        if(self.offset >= self.videoData.length) self.offset = 0;

+        if(self.offset >= self.videoData.length) {

+            self.offset = 0;

+            [self loadVideoData]; // The decoder modifies the in memory data. Better flush it.

+            [self initializeDecoder]; // The decoder doesn't like the new stream discontinuity. Better refresh it.

+        }

     }

     [self.view setNeedsDisplay];