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authorMatthieu Bouron <matthieu.bouron@gmail.com>2012-09-20 20:31:28 +0200
committerLuca Barbato <lu_zero@gentoo.org>2014-03-06 19:28:20 +0100
commite118bb1a33889d4df56f28975b4fd0793b4f5c32 (patch)
tree9d804978f6fc2f37e07897472c7e5b1482fb7bc9 /libavformat
parentd48430c367947a64647c6959cf472f2c01778b17 (diff)
downloadffmpeg-e118bb1a33889d4df56f28975b4fd0793b4f5c32.tar.gz
mxf: Introduce ff_mxf_get_samples_per_frame
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Diffstat (limited to 'libavformat')
-rw-r--r--libavformat/mxf.c40
-rw-r--r--libavformat/mxf.h7
2 files changed, 47 insertions, 0 deletions
diff --git a/libavformat/mxf.c b/libavformat/mxf.c
index d3798cdb4d..01018d35f2 100644
--- a/libavformat/mxf.c
+++ b/libavformat/mxf.c
@@ -106,3 +106,43 @@ int ff_mxf_decode_pixel_layout(const char pixel_layout[16], enum AVPixelFormat *
return -1;
}
+
+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
+ { { 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 AVRational mxf_time_base[] = {
+ { 1001, 24000 },
+ { 1, 24},
+ { 1001, 30000 },
+ { 1001, 60000 },
+ { 1, 25 },
+ { 1, 50 },
+ { 0, 0}
+};
+
+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];
+}
diff --git a/libavformat/mxf.h b/libavformat/mxf.h
index 773f30f3a2..265b0cf005 100644
--- a/libavformat/mxf.h
+++ b/libavformat/mxf.h
@@ -21,6 +21,7 @@
#ifndef AVFORMAT_MXF_H
#define AVFORMAT_MXF_H
+#include "avformat.h"
#include "libavcodec/avcodec.h"
#include <stdint.h>
@@ -66,11 +67,17 @@ typedef struct MXFCodecUL {
int id;
} MXFCodecUL;
+typedef struct MXFSamplesPerFrame {
+ struct AVRational time_base;
+ int samples_per_frame[6];
+} MXFSamplesPerFrame;
+
extern const MXFCodecUL ff_mxf_data_definition_uls[];
extern const MXFCodecUL ff_mxf_codec_uls[];
extern const MXFCodecUL ff_mxf_pixel_format_uls[];
int ff_mxf_decode_pixel_layout(const char pixel_layout[16], enum AVPixelFormat *pix_fmt);
+const MXFSamplesPerFrame *ff_mxf_get_samples_per_frame(AVFormatContext *s, AVRational time_base);
#define PRINT_KEY(pc, s, x) av_dlog(pc, "%s %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", s, \
(x)[0], (x)[1], (x)[2], (x)[3], (x)[4], (x)[5], (x)[6], (x)[7], (x)[8], (x)[9], (x)[10], (x)[11], (x)[12], (x)[13], (x)[14], (x)[15])