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];
+}
#ifndef AVFORMAT_MXF_H
#define AVFORMAT_MXF_H
+#include "avformat.h"
#include "libavcodec/avcodec.h"
#include <stdint.h>
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])