February 2014 libav security tracking bug

This is a bug to track the February 2014 libav security updates:

version 0.8.10:

- oggparseogm: check timing variables
- mathematics: remove asserts from av_rescale_rnd()
- vc1: Always reset numref when parsing a new frame header.
- h264: reset num_reorder_frames if it is invalid
- h264: check that an IDR NAL only contains I slices
- mov: Free an earlier allocated array if allocating a new one
- segafilm: fix leaks if reading the header fails
- h264_cavlc: check the size of the intra PCM data.
- cavs: Check for negative cbp
- avi: DV in AVI must be considered single stream
- avutil: use align == 0 for default alignment in audio sample buffer functions
- flashsv: Check diff_start diff_height values
- dsputil/pngdsp: fix signed/unsigned type in end comparison
- vqavideo: check chunk sizes before reading chunks
- avi: directly resync on DV in AVI read failure
- get_bits: change the failure condition in init_get_bits
- twinvq: Cope with gcc-4.8.2 miscompilation
- pthread: Avoid spurious wakeups
- pthread: Fix deadlock during thread initialization
- mpegvideo: Initialize chroma_*_shift and codec_tag even if the size is 0
- vc1dec: Don't decode slices when the latest slice header failed to decode
- vc1dec: Make sure last_picture is initialized in vc1_decode_skip_blocks
- r3d: Add more input value validation
- fraps: Make the input buffer size checks more strict
- svq3: Avoid a division by zero
- rmdec: Validate the fps value
- twinvqdec: Check the ibps parameter separately
- asfdec: Check the return value of asf_read_stream_properties
- mxfdec: set audio timebase to 1/samplerate
- pcx: Check the packet size before assuming it fits a palette
- rpza: Fix a buffer size check
- xxan: Disallow odd width
- xan: Only read within the data that actually was initialized
- xan: Use bytestream2 to limit reading to within the buffer
- pcx: Consume the whole packet if giving up due to missing palette
- pngdec: Stop trying to decode once inflate returns Z_STREAM_END
- mov: Make sure the read sample count is nonnegative
- bfi: Add some very basic sanity checks for input packet sizes
- bfi: Avoid divisions by zero
- electronicarts: Add more sanity checking for the number of channels
- riffdec: Add sanity checks for the sample rate
- mvi: Add sanity checking for the audio frame size
- xwma: Avoid division by zero
- avidec: Make sure a packet is large enough before reading its data
- vqf: Make sure the bitrate is in the valid range
- vqf: Make sure sample_rate is set to a valid value
- vc1dec: Undo mpegvideo initialization if unable to allocate tables
- vc1dec: Fix leaks in ff_vc1_decode_init_alloc_tables on errors
- wnv1: Make sure the input packet is large enough
- dca: Validate the lfe parameter
- rl2: Avoid a division by zero
- wtv: Add more sanity checks for a length read from the file
- segafilm: Validate the number of audio channels
- qpeg: Add checks for running out of rows in qpeg_decode_inter
- mpegaudiodec: Validate that the number of channels fits at the given offset
- asv1: Verify the amount of extradata
- idroqdec: Make sure a video stream has been allocated before returning packets
- rv10: Validate the dimensions set from the container
- xmv: Add more sanity checks for parameters read from the bitstream
- ffv1: Make sure at least one slice context is initialized
- truemotion2: Use av_freep properly in an error path
- eacmv: Make sure a reference frame exists before referencing it
- mpeg4videodec: Check the width/height in mpeg4_decode_sprite_trajectory
- ivi_common: Make sure color planes have been initialized
- oggparseogm: Convert to use bytestream2
- rv34: Check the return value from ff_rv34_decode_init
- matroskadec: Verify realaudio codec parameters
- mace: Make sure that the channel count is set to a valid value
- svq3: Check for any negative return value from ff_h264_check_intra_pred_mode
- vp3: Check the framerate for validity
- cavsdec: Make sure a sequence header has been decoded before decoding pictures
- sierravmd: Do sanity checking of frame sizes
- omadec: Properly check lengths before incrementing the position
- mpc8: Make sure the first stream exists before parsing the seek table
- mpc8: Check the seek table size parsed from the bitstream
- zmbvdec: Check the buffer size for uncompressed data
- ape: Don't allow the seektable to be omitted
- shorten: Break out of loop looking for fmt chunk if none is found
- shorten: Use a checked bytestream reader for the wave header
- smacker: Make sure we don't fill in huffman codes out of range
- smacker: Avoid integer overflow when allocating packets
- smacker: Don't return packets in unallocated streams
- dsicin: Add some basic sanity checks for fields read from the file
- roqvideodec: check dimensions validity
- qdm2: check array index before use, fix out of array accesses
- alsdec: check block length