Simplify writing stream metadata.
[libav.git] / doc / APIchanges
1 Never assume the API of libav* to be stable unless at least 1 week has passed since
2 the last major version increase.
3 The last version increases were:
4 libavcodec: ?
5 libavdevice: ?
6 libavfilter: 2009-10-18
7 libavformat: ?
8 libpostproc: ?
9 libswscale: ?
10 libavutil: 2009-03-08
11
12
13 API changes, most recent first:
14
15 2010-04-01 - rxxxxx - lavf 52.61.0 - metadata API
16 Add a flag for av_metadata_set2() to disable overwriting of
17 existing tags.
18
19 2010-04-01 - r22753 - lavc 52.66.0
20 Add avcodec_get_edge_width()
21
22 2010-03-31 - r22750 - lavc 52.65.0
23 Add avcodec_copy_context().
24
25 2010-03-31 - r22748 - lavf 52.60.0 - av_match_ext()
26 Make av_match_ext() public.
27
28 2010-03-31 - r22736 - lavu 50.14.0 - AVMediaType
29 Move AVMediaType enum from libavcodec to libavutil.
30
31 2010-03-31 - r22735 - lavc 52.64.0 - AVMediaType
32 Define AVMediaType enum, and use it instead of enum CodecType, which
33 is deprecated and will be dropped at the next major bump.
34
35 2010-03-25 - r22684 - lavu 50.13.0 - av_strerror()
36 Implement av_strerror().
37
38 2010-03-23 - r22649 - lavc 52.60.0 - av_dct_init()
39 Support DCT-I and DST-I
40
41 2010-03-15 - r22540 - lavf 52.56.0 - AVFormatContext.start_time_realtime
42 Add AVFormatContext.start_time_realtime field.
43
44 2010-03-13 - r22506 - lavfi 1.18.0 - AVFilterPicRef.pos
45 Add AVFilterPicRef.pos field.
46
47 2010-03-13 - r22501 - lavu 50.12.0 - error.h
48 Move error code definitions from libavcodec/avcodec.h to
49 the new public header libavutil/error.h.
50
51 2010-03-07 - r22291 - lavc 52.56.0 - avfft.h
52 Add public FFT interface.
53
54 2010-03-06 - r22251 - lavu 50.11.0 - av_stristr()
55 Add av_stristr().
56
57 2010-03-03 - r22174 - lavu 50.10.0 - av_tree_enumerate()
58 Add av_tree_enumerate().
59
60 2010-02-07 - r21673 - lavu 50.9.0 - av_compare_ts()
61 Add av_compare_ts().
62
63 2010-02-05 - r30513 - lsws 0.10.0 - sws_getCoefficients()
64 Add sws_getCoefficients().
65
66 2010-02-01 - r21587 - lavf 52.50.0 - metadata API
67 Add a list of generic tag names, change 'author' -> 'artist',
68 'year' -> 'date'.
69
70 2010-01-30 - r21545 - lavu 50.8.0 - av_get_pix_fmt()
71 Add av_get_pix_fmt().
72
73 2010-01-21 - r30381 - lsws 0.9.0 - sws_scale
74 Change constness attributes of sws_scale() parameters.
75
76 2010-01-10 - r21121 - lavfi 1.15.0 - avfilter_graph_config_links()
77 Add a log_ctx parameter to avfilter_graph_config_links().
78
79 2010-01-07 - r30236 - lsws 0.8.0 - sws_isSupported{In,Out}put
80 Add sws_isSupportedInput() and sws_isSupportedOutput() functions.
81
82 2010-01-06 - r21035 - lavfi 1.14.0 - avfilter_add_colorspace()
83 Change the avfilter_add_colorspace() signature, make it accept an
84 (AVFilterFormats **) rather than an (AVFilterFormats *) as before.
85
86 2010-01-03 - r21007 - lavfi 1.13.0 - avfilter_add_colorspace()
87 Add avfilter_add_colorspace().
88
89 2010-01-02 - r20998 - lavf 52.46.0 - av_match_ext()
90 Add av_match_ext(), it should be used in place of match_ext().
91
92 2010-01-01 - r20991 - lavf 52.45.0 - av_guess_format()
93 Add av_guess_format(), it should be used in place of guess_format().
94
95 2009-12-13 - r20834 - lavf 52.43.0 - metadata API
96 Add av_metadata_set2(), AV_METADATA_DONT_STRDUP_KEY and AV_METADATA_DONT_STRDUP_VAL.
97
98 2009-12-13 - r20829 - lavu 50.7.0 - avstring.h API
99 Add av_d2str().
100
101 2009-12-13 - r20826 - lavc 52.42.0 - AVStream
102 Add avg_frame_rate.
103
104 2009-12-12 - r20808 - lavu 50.6.0 - av_bmg_next()
105 Introduce the av_bmg_next() function.
106
107 2009-12-05 - r20734 - lavfi 1.12.0 - avfilter_draw_slice()
108 Add a slice_dir parameter to avfilter_draw_slice().
109
110 2009-11-26 - r20611 - lavfi 1.11.0 - AVFilter
111 Remove the next field from AVFilter, this is not anymore required.
112
113 2009-11-25 - r20607 - lavfi 1.10.0 - avfilter_next()
114 Introduce the avfilter_next() function.
115
116 2009-11-25 - r20605 - lavfi 1.9.0 - avfilter_register()
117 Change the signature of avfilter_register() to make it return an
118 int. This is required since now the registration operation may fail.
119
120 2009-11-25 - r20603 - lavu 50.5.0 - pixdesc.h API
121 Make the pixdesc.h API public.
122
123 2009-10-27 - r20385 - lavfi 1.5.0 - AVFilter.next
124 Add a next field to AVFilter, this is used for simplifying the
125 registration and management of the registered filters.
126
127 2009-10-23 - r20356 - lavfi 1.4.1 - AVFilter.description
128 Add a description field to AVFilter.
129
130 2009-10-19 - r20302 - lavfi 1.3.0 - avfilter_make_format_list()
131 Change the interface of avfilter_make_format_list() from
132 avfilter_make_format_list(int n, ...) to
133 avfilter_make_format_list(enum PixelFormat *pix_fmts).
134
135 2009-10-18 - r20272 - lavfi 1.0.0 - avfilter_get_video_buffer()
136 Make avfilter_get_video_buffer() recursive and add the w and h
137 parameters to it.
138
139 2009-10-07 - r20189 - lavfi 0.5.1 - AVFilterPic
140 Add w and h fields to AVFilterPic.
141
142 2009-06-22 - r19250 - lavf 52.34.1 - AVFormatContext.packet_size
143 This is now an unsigned int instead of a signed int.
144
145 2009-06-19 - r19222 - lavc 52.32.0 - AVSubtitle.pts
146 Add a pts field to AVSubtitle which gives the subtitle packet pts
147 in AV_TIME_BASE. Some subtitle de-/encoders (e.g. XSUB) will
148 not work right without this.
149
150 2009-06-03 - r19078 - lavc 52.30.2 - AV_PKT_FLAG_KEY
151 PKT_FLAG_KEY has been deprecated and will be dropped at the next
152 major version. Use AV_PKT_FLAG_KEY instead.
153
154 2009-06-01 - r19025 - lavc 52.30.0 - av_lockmgr_register()
155 av_lockmgr_register() can be used to register a callback function
156 that lavc (and in the future, libraries that depend on lavc) can use
157 to implement mutexes. The application should provide a callback function
158 that implements the AV_LOCK_* operations described in avcodec.h.
159 When the lock manager is registered, FFmpeg is guaranteed to behave
160 correctly in a multi-threaded application.
161
162 2009-04-30 - r18719 - lavc 52.28.0 - av_free_packet
163 av_free_packet() is no longer an inline function. It is now exported.
164
165 2009-04-11 - r18431 - lavc 52.25.0 - deprecate av_destruct_packet_nofree
166 Please use NULL instead. This has been supported since r16506
167 (lavf > 52.23.1, lavc > 52.10.0).
168
169 2009-04-07 - r18351 - lavc 52.23.0 - avcodec_decode_video/audio/subtitle
170 The old decoding functions are deprecated, all new code should use the
171 new functions avcodec_decode_video2(), avcodec_decode_audio3() and
172 avcodec_decode_subtitle2(). These new functions take an AVPacket *pkt
173 argument instead of a const uint8_t *buf / int buf_size pair.
174
175 2009-04-03 - r18321 - lavu 50.3.0 - av_fifo_space
176 Introduce the av_fifo_space() function.
177
178 2009-04-02 - r18317 - lavc 52.23.0 - AVPacket
179 Move AVPacket declaration from libavformat/avformat.h to
180 libavcodec/avcodec.h.
181
182 2009-03-22 - r18163 - lavu 50.2.0 - RGB32 pixel formats
183 Convert the pixel formats PIX_FMT_ARGB, PIX_FMT_RGBA, PIX_FMT_ABGR,
184 PIX_FMT_BGRA, which were defined as macros, into enum PixelFormat values.
185 Conversely PIX_FMT_RGB32, PIX_FMT_RGB32_1, PIX_FMT_BGR32 and
186 PIX_FMT_BGR32_1 are now macros.
187 avcodec_get_pix_fmt() now recognizes the "rgb32" and "bgr32" aliases.
188 Re-sort the enum PixelFormat list accordingly.
189 This change breaks API/ABI backward compatibility.
190
191 2009-03-22 - r18133 - lavu 50.1.0 - PIX_FMT_RGB5X5 endian variants
192 Add the enum PixelFormat values:
193 PIX_FMT_RGB565BE, PIX_FMT_RGB565LE, PIX_FMT_RGB555BE, PIX_FMT_RGB555LE,
194 PIX_FMT_BGR565BE, PIX_FMT_BGR565LE, PIX_FMT_BGR555BE, PIX_FMT_BGR555LE.
195
196 2009-03-21 - r18116 - lavu 50.0.0 - av_random*
197 The Mersenne Twister PRNG implemented through the av_random* functions
198 was removed. Use the lagged Fibonacci PRNG through the av_lfg* functions
199 instead.
200
201 2009-03-08 - r17869 - lavu 50.0.0 - AVFifoBuffer
202 av_fifo_init, av_fifo_read, av_fifo_write and av_fifo_realloc were dropped
203 and replaced by av_fifo_alloc, av_fifo_generic_read, av_fifo_generic_write
204 and av_fifo_realloc2.
205 In addition, the order of the function arguments of av_fifo_generic_read
206 was changed to match av_fifo_generic_write.
207 The AVFifoBuffer/struct AVFifoBuffer may only be used in an opaque way by
208 applications, they may not use sizeof() or directly access members.
209
210 2009-03-01 - r17682 - lavf 52.31.0 - Generic metadata API
211 Introduce a new metadata API (see av_metadata_get() and friends).
212 The old API is now deprecated and should not be used anymore. This especially
213 includes the following structure fields:
214 - AVFormatContext.title
215 - AVFormatContext.author
216 - AVFormatContext.copyright
217 - AVFormatContext.comment
218 - AVFormatContext.album
219 - AVFormatContext.year
220 - AVFormatContext.track
221 - AVFormatContext.genre
222 - AVStream.language
223 - AVStream.filename
224 - AVProgram.provider_name
225 - AVProgram.name
226 - AVChapter.title