APIchanges

Never assume the API of libav* to be stable unless at least 1 month has passed
since the last major version increase.

The last version increases were:
libavcodec:    2012-01-27
libavdevice:   2011-04-18
libavfilter:   2012-06-22
libavformat:   2012-01-27
libavresample: 2012-04-24
libpostproc:   2011-04-18
libswresample: 2011-09-19
libswscale:    2011-06-20
libavutil:     2011-04-18


API changes, most recent first:

2012-07-10 - xxxxxxx - lavfi 3.2.0 - avfilter.h
  Add init_opaque() callback to AVFilter struct.

2012-06-26 - xxxxxxx - lavu 51.63.100 - imgutils.h
  Add functions to libavutil/imgutils.h:
  av_image_get_buffer_size()
  av_image_fill_arrays()
  av_image_copy_to_buffer()

2012-06-24 - xxxxxxx - lavu 51.62.100 - version.h
  version moved from avutil.h to version.h

2012-04-11 - xxxxxxx - lavu 51.58.100 - error.h
  Add av_make_error_string() and av_err2str() utilities to
  libavutil/error.h.

2012-06-05 - xxxxxxx - lavc 54.24.100
  Add pkt_duration field to AVFrame.

2012-05-24 - xxxxxxx - lavu 51.54.100
  Move AVPALETTE_SIZE and AVPALETTE_COUNT macros from
  libavcodec/avcodec.h to libavutil/pixfmt.h.

2012-05-07 - xxxxxxx - lavf 54.5.100
  Add av_guess_sample_aspect_ratio() function.

2012-04-20 - xxxxxxx - lavfi 2.70.100
  Add avfilter_unref_bufferp() to avfilter.h.

2012-04-12 - xxxxxxx - lavfi 2.68.100
  Install libavfilter/asrc_abuffer.h public header.

2012-03-26 - a67d9cf - lavfi 2.66.100
  Add avfilter_fill_frame_from_{audio_,}buffer_ref() functions.

2012-06-22 - xxxxxxx - lavu 51.34.0
  Add av_usleep()

2012-06-20 - ae0a301 - lavu 51.33.0
  Move av_gettime() to libavutil, add libavutil/time.h

2012-xx-xx - xxxxxxx - lavr 0.0.3
  Add a parameter to avresample_build_matrix() for Dolby/DPLII downmixing.

2012-xx-xx - xxxxxxx - lavfi 2.23.0 - avfilter.h
  Add AVFilterContext.nb_inputs/outputs. Deprecate
  AVFilterContext.input/output_count.

2012-xx-xx - xxxxxxx - lavfi 2.22.0 - avfilter.h
  Add avfilter_pad_get_type() and avfilter_pad_get_name(). Those
  should now be used instead of accessing AVFilterPad members
  directly.

2012-xx-xx - xxxxxxx - lavu 51.32.0 - audioconvert.h
  Add av_get_channel_layout_channel_index(), av_get_channel_name()
  and av_channel_layout_extract_channel().

2012-05-25 - e0e0793 - lavu 51.31.0 - opt.h
  Add av_opt_set_bin()

2012-05-15 - lavfi 2.17.0
  Add support for audio filters
  ac71230/a2cd9be - add video/audio buffer sink in a new installed
                    header buffersink.h
  720c6b7 - add av_buffersrc_write_frame(), deprecate
            av_vsrc_buffer_add_frame()
  ab16504 - add avfilter_copy_buf_props()
  9453c9e - add extended_data to AVFilterBuffer
  1b8c927 - add avfilter_get_audio_buffer_ref_from_arrays()

2012-05-09 - lavu 51.30.0 - samplefmt.h
  142e740 - add av_samples_copy()
  6d7f617 - add av_samples_set_silence()

2012-05-09 - a5117a2 - lavc 54.13.1
  For audio formats with fixed frame size, the last frame
  no longer needs to be padded with silence, libavcodec
  will handle this internally (effectively all encoders
  behave as if they had CODEC_CAP_SMALL_LAST_FRAME set).

2012-05-07 - 828bd08 - lavc 54.13.0 - avcodec.h
  Add sample_rate and channel_layout fields to AVFrame.

2012-05-01 - 4010d72 - lavr 0.0.1
  Change AV_MIX_COEFF_TYPE_Q6 to AV_MIX_COEFF_TYPE_Q8.

2012-04-25 - 3527a73 - lavu 51.29.0 - cpu.h
  Add av_parse_cpu_flags()

2012-04-24 - c8af852 - lavr 0.0.0
  Add libavresample audio conversion library

2012-04-20 - 0c0d1bc - lavu 51.28.0 - audio_fifo.h
  Add audio FIFO functions:
    av_audio_fifo_free()
    av_audio_fifo_alloc()
    av_audio_fifo_realloc()
    av_audio_fifo_write()
    av_audio_fifo_read()
    av_audio_fifo_drain()
    av_audio_fifo_reset()
    av_audio_fifo_size()
    av_audio_fifo_space()

2012-04-14 - lavfi 2.16.0 - avfiltergraph.h
  d7bcc71 Add avfilter_graph_parse2().

2012-04-08 - 4d693b0 - lavu 51.27.0 - samplefmt.h
  Add av_get_packed_sample_fmt() and av_get_planar_sample_fmt()

2012-03-21 - b75c67d - lavu 51.43.100
  Add bprint.h for bprint API.

2012-02-21 - 9cbf17e - lavc 54.4.100
  Add av_get_pcm_codec() function.

2012-02-16 - 560b224 - libswr 0.7.100
  Add swr_set_matrix() function.

2012-02-09 - c28e7af - lavu 51.39.100
  Add a new installed header libavutil/timestamp.h with timestamp
  utilities.

2012-02-06 - 70ffda3 - lavu 51.38.100
  Add av_parse_ratio() function to parseutils.h.

2012-02-06 - 70ffda3 - lavu 51.38.100
  Add AV_LOG_MAX_OFFSET macro to log.h.

2012-02-02 - 0eaa123 - lavu 51.37.100
  Add public timecode helpers.

2012-01-24 - 0c3577b - lavfi 2.60.100
  Add avfilter_graph_dump.

2012-03-05 - lavc 54.8.0
  6699d07 Add av_get_exact_bits_per_sample()
  9524cf7 Add av_get_audio_frame_duration()

2012-03-04 - 44fe77b - lavc 54.7.0 - avcodec.h
  Add av_codec_is_encoder/decoder().

2012-03-01 - 442c132 - lavc 54.3.0 - avcodec.h
  Add av_packet_shrink_side_data.

2012-02-29 - dd2a4bc - lavf 54.2.0 - avformat.h
  Add AVStream.attached_pic and AV_DISPOSITION_ATTACHED_PIC,
  used for dealing with attached pictures/cover art.

2012-02-25 - c9bca80 - lavu 51.24.0 - error.h
  Add AVERROR_UNKNOWN
  NOTE: this was backported to 0.8

2012-02-20 - e9cda85 - lavc 54.2.0
  Add duration field to AVCodecParserContext

2012-02-20 - 0b42a93 - lavu 51.23.1 - mathematics.h
  Add av_rescale_q_rnd()

2012-02-08 - 38d5533 - lavu 51.22.1 - pixdesc.h
  Add PIX_FMT_PSEUDOPAL flag.

2012-02-08 - 52f82a1 - lavc 54.01.0
  Add avcodec_encode_video2() and deprecate avcodec_encode_video().

2012-02-01 - 316fc74 - lavc 54.01.0
  Add av_fast_padded_malloc() as alternative for av_realloc() when aligned
  memory is required. The buffer will always have FF_INPUT_BUFFER_PADDING_SIZE
  zero-padded bytes at the end.

2012-01-31 - dd6d3b0 - lavf 54.01.0
  Add avformat_get_riff_video_tags() and avformat_get_riff_audio_tags().
  NOTE: this was backported to 0.8

2012-01-31 - af08d9a - lavc 54.01.0
  Add avcodec_is_open() function.
  NOTE: this was backported to 0.8

2012-01-30 - 8b93312 - lavu 51.22.0 - intfloat.h
  Add a new installed header libavutil/intfloat.h with int/float punning
  functions.
  NOTE: this was backported to 0.8