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Merge commit 'e118bb1a33889d4df56f28975b4fd0793b4f5c32'

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* commit 'e118bb1a33889d4df56f28975b4fd0793b4f5c32':
  mxf: Introduce ff_mxf_get_samples_per_frame

Conflicts:
	libavformat/mxf.c
	libavformat/mxf.h

See: 906a2638139bfcce17d423cfa3a8ee633b38a2af
Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-03-06 22:19:01 +01:00
commit 2265212396
1 changed files with 29 additions and 18 deletions
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47
libavformat/mxf.c
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@ -107,7 +107,7 @@ int ff_mxf_decode_pixel_layout(const char pixel_layout[16], enum AVPixelFormat *
return -1;
}
static const MXFSamplesPerFrame mxf_samples_per_frames[] = {
static const MXFSamplesPerFrame mxf_spf[] = {
{ { 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
@ -116,22 +116,33 @@ static const MXFSamplesPerFrame mxf_samples_per_frames[] = {
{ { 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];
}
static const AVRational mxf_time_base[] = {
{ 1001, 24000 },
{ 1, 24},
{ 1001, 30000 },
{ 1001, 60000 },
{ 1, 25 },
{ 1, 50 },
{ 0, 0}
};
// 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;
const MXFSamplesPerFrame *ff_mxf_get_samples_per_frame(AVFormatContext *s,
AVRational time_base)
{
int idx = av_find_nearest_q_idx(time_base, mxf_time_base);
AVRational diff = av_sub_q(time_base, mxf_time_base[idx]);
diff.num = abs(diff.num);
if (av_cmp_q(diff, (AVRational){1, 1000}) >= 0)
return NULL;
if (av_cmp_q(time_base, mxf_time_base[idx]))
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_spf[idx].time_base.num,
mxf_spf[idx].time_base.den);
return &mxf_spf[idx];
}