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mxfenc: factorize samples per frame code

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Reviewed-by: Tomas Härdin <tomas.hardin@codemill.se>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Matthieu Bouron 2012-09-13 00:48:39 +02:00 committed by Michael Niedermayer
parent d1974e05d1
commit 906a263813
1 changed files with 39 additions and 27 deletions
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66
libavformat/mxfenc.c
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@ -47,10 +47,37 @@
#include "mxf.h"
#include "config.h"
static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
static const int NTSC_60_samples_per_frame[] = { 801, 801, 801, 801, 800, 0 };
static const int PAL_samples_per_frame[] = { 1920, 0 };
static const int PAL_50_samples_per_frame[] = { 960, 0 };
typedef struct {
struct AVRational time_base;
int samples_per_frame[6];
} MXFSamplesPerFrame;
static const MXFSamplesPerFrame mxf_samples_per_frames[] = {
{ { 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
};
static const MXFSamplesPerFrame* 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;
}
extern AVOutputFormat ff_mxf_d10_muxer;
@ -1662,7 +1689,7 @@ static int mxf_write_header(AVFormatContext *s)
MXFContext *mxf = s->priv_data;
int i, ret;
uint8_t present[FF_ARRAY_ELEMS(mxf_essence_container_uls)] = {0};
const int *samples_per_frame = NULL;
const MXFSamplesPerFrame *spf = NULL;
AVDictionaryEntry *t;
int64_t timestamp = 0;
AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
@ -1687,28 +1714,13 @@ static int mxf_write_header(AVFormatContext *s)
// Default component depth to 8
sc->component_depth = 8;
mxf->timecode_base = (tbc.den + tbc.num/2) / tbc.num;
switch (mxf->timecode_base) {
case 25:
samples_per_frame = PAL_samples_per_frame;
mxf->time_base = (AVRational){ 1, 25 };
break;
case 50:
samples_per_frame = PAL_50_samples_per_frame;
mxf->time_base = (AVRational){ 1, 50 };
break;
case 30:
samples_per_frame = NTSC_samples_per_frame;
mxf->time_base = (AVRational){ 1001, 30000 };
break;
case 60:
samples_per_frame = NTSC_60_samples_per_frame;
mxf->time_base = (AVRational){ 1001, 60000 };
break;
default:
spf = mxf_get_samples_per_frame(s, tbc);
if (!spf) {
av_log(s, AV_LOG_ERROR, "Unsupported video frame rate %d/%d\n",
tbc.den, tbc.num);
return AVERROR(EINVAL);
}
mxf->time_base = spf->time_base;
rate = av_inv_q(mxf->time_base);
avpriv_set_pts_info(st, 64, mxf->time_base.num, mxf->time_base.den);
if (!tcr)
@ -1738,7 +1750,7 @@ static int mxf_write_header(AVFormatContext *s)
mxf->edit_unit_byte_count += 16 + 4 + (uint64_t)st->codec->bit_rate *
mxf->time_base.num / (8*mxf->time_base.den);
mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
mxf->edit_unit_byte_count += 16 + 4 + 4 + samples_per_frame[0]*8*4;
mxf->edit_unit_byte_count += 16 + 4 + 4 + spf->samples_per_frame[0]*8*4;
mxf->edit_unit_byte_count += klv_fill_size(mxf->edit_unit_byte_count);
}
} else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
@ -1812,10 +1824,10 @@ static int mxf_write_header(AVFormatContext *s)
return AVERROR(ENOMEM);
mxf->timecode_track->index = -1;
if (!samples_per_frame)
samples_per_frame = PAL_samples_per_frame;
if (!spf)
spf = mxf_get_samples_per_frame(s, (AVRational){ 1, 25 });
if (ff_audio_interleave_init(s, samples_per_frame, mxf->time_base) < 0)
if (ff_audio_interleave_init(s, spf->samples_per_frame, mxf->time_base) < 0)
return -1;
return 0;