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author | Matthieu Bouron <matthieu.bouron@gmail.com> | 2012-09-20 22:31:28 +0400 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2012-09-21 18:20:38 +0400 |
commit | 41f7e0649ff24d75708d47f603ebdb2dff168f2d (patch) | |
tree | da3ca87398fb97d732657ae16adcb85eb3b2a980 /libavformat/mxf.c | |
parent | 7bc70930ddc487712419e65ebca4d77868a20ffb (diff) |
mxf: export ff_mxf_get_samples_per_frame to lavf
Reviewed-by: Tomas Härdin <tomas.hardin@codemill.se>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavformat/mxf.c')
-rw-r--r-- | libavformat/mxf.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/libavformat/mxf.c b/libavformat/mxf.c index 224ade5d23..7230444b5f 100644 --- a/libavformat/mxf.c +++ b/libavformat/mxf.c @@ -106,3 +106,32 @@ int ff_mxf_decode_pixel_layout(const char pixel_layout[16], enum PixelFormat *pi return -1; } + +static const MXFSamplesPerFrame mxf_samples_per_frames[] = { + { { 1001, 24000 }, { 2002, 0, 0, 0, 0, 0 } }, // FILM 23.976 + { { 1, 24}, { 2000, 0, 0, 0, 0, 0 } }, // FILM 24 + { { 1001, 30000 }, { 1602, 1601, 1602, 1601, 1602, 0 } }, // NTSC 29.97 + { { 1001, 60000 }, { 801, 801, 801, 801, 800, 0 } }, // NTSC 59.94 + { { 1, 25 }, { 1920, 0, 0, 0, 0, 0 } }, // PAL 25 + { { 1, 50 }, { 960, 0, 0, 0, 0, 0 } }, // PAL 50 +}; + +const MXFSamplesPerFrame *ff_mxf_get_samples_per_frame(AVFormatContext *s, AVRational time_base) +{ + int i; + for (i = 0; i < FF_ARRAY_ELEMS(mxf_samples_per_frames); i++) { + if (!av_cmp_q(mxf_samples_per_frames[i].time_base, time_base)) + return &mxf_samples_per_frames[i]; + } + + // Find closest container time base for approximative codec time base like 1/29.97, 1/30, ... + for (i = 0; i < FF_ARRAY_ELEMS(mxf_samples_per_frames); i++) { + if (fabs(av_q2d(mxf_samples_per_frames[i].time_base) - av_q2d(time_base)) < 0.0001) { + av_log(s, AV_LOG_WARNING, "%d/%d input time base matched %d/%d container time base\n", + time_base.num, time_base.den, + mxf_samples_per_frames[i].time_base.num, mxf_samples_per_frames[i].time_base.den); + return &mxf_samples_per_frames[i]; + } + } + return NULL; +} |