Codec.FFmpeg.Common

Documentation

open_codec :: AVCodecContext -> AVCodec -> Ptr AVDictionary -> IO CInt

av_frame_alloc :: IO AVFrame

av_frame_get_buffer :: AVFrame -> CInt -> IO CInt

av_frame_free :: Ptr AVFrame -> IO ()

codec_close :: AVCodecContext -> IO CInt

init_packet :: AVPacket -> IO ()

free_packet :: AVPacket -> IO ()

av_malloc :: CSize -> IO (Ptr ())

av_free :: Ptr () -> IO ()

sws_getCachedContext :: SwsContext -> CInt -> CInt -> AVPixelFormat -> CInt -> CInt -> AVPixelFormat -> SwsAlgorithm -> Ptr () -> Ptr () -> Ptr CDouble -> IO SwsContext

sws_scale :: SwsContext -> Ptr (Ptr CUChar) -> Ptr CInt -> CInt -> CInt -> Ptr (Ptr CUChar) -> Ptr CInt -> IO CInt

av_image_get_buffer_size :: AVPixelFormat -> CInt -> CInt -> CInt -> IO CInt

av_image_copy_to_buffer :: Ptr CUChar -> CInt -> Ptr (Ptr CUChar) -> Ptr CInt -> AVPixelFormat -> CInt -> CInt -> CInt -> IO CInt

Utility functions

wrapIOError :: (MonadIO m, MonadError String m) => IO a -> m a

Catch an IOException from an IO action and re-throw it in a wrapping monad transformer.

Wrappers that may throw IOExceptions.

frame_alloc_check :: IO AVFrame

Allocate an AVFrame and set its fields to default values.

frame_get_buffer_check :: AVFrame -> CInt -> IO ()

Allocate new buffer(s) for audio or video data with the required alignment. Note, for video frames, pixel format, width, and height must be set before calling this function. For audio frames, sample format, nb_samples, and channel_layout must be set.

avPixelStride :: AVPixelFormat -> Maybe Int

Bytes-per-pixel for an AVPixelFormat

lineSizeAlign :: CInt -> CInt

Return line size alignment.

frameLineSize :: AVFrame -> IO (Maybe CInt)

Retun AVFrames line size.

frameLineSizeT :: AVFrame -> MaybeT IO CInt

Transformer version of frameLineSize.

frameAlign :: AVFrame -> IO (Maybe CInt)

frameAlignT :: AVFrame -> MaybeT IO CInt

Wrappers for copying AVFrames image to buffer.

frameBufferSize :: AVFrame -> IO (Maybe CInt)

Return size of buffer for AVFrames image.

frameBufferSizeT :: AVFrame -> MaybeT IO CInt

Transformer version of frameBufferSize.

frameCopyToBuffer :: AVFrame -> Ptr CUChar -> IO (Maybe CInt)

Copy AVFrames image to buffer. It is assumed that size of buffer is equal to

bufSize <- fromJust <$> frameBufferSize frame.

frameCopyToBufferT :: AVFrame -> Ptr CUChar -> MaybeT IO CInt

Transformer version of frameCopyToBuffer.

FFmpeg Errors

av_strerror :: CInt -> Ptr CChar -> CSize -> IO CInt

stringError :: CInt -> IO String