ref: a224b6326320150b23fb6fa641eee8da3a2e1dc4
parent: a076ccdfc2ed52cebd6d3db15644228826b0db67
author: Sigrid Haflínudóttir <ftrvxmtrx@gmail.com>
date: Thu Sep 10 11:41:17 EDT 2020
use stts to provide IVF timestamps
--- a/iso.c
+++ b/iso.c
@@ -2,11 +2,14 @@
#include <libc.h>
#include <bio.h>
+#define MIN(a,b) ((a)<=(b)?(a):(b))
+
typedef struct Audio Audio;
typedef struct Box Box;
typedef struct Moof Moof;
typedef struct RunSample RunSample;
typedef struct SampleToChunk SampleToChunk;
+typedef struct TimeToSample TimeToSample;
typedef struct Track Track;
typedef struct Video Video;
@@ -103,7 +106,7 @@
struct {u32int entrycount;
- /* FIXME entries */
+ TimeToSample *entry;
}stts;
struct {@@ -162,6 +165,11 @@
u32int sdt;
};
+struct TimeToSample {+ u32int samplecount;
+ u32int sampledelta;
+};
+
enum {HandlerVideo = 0x76696465u,
HandlerAudio = 0x736f756eu,
@@ -242,6 +250,9 @@
SampleToChunk *stc;
u32int numstc;
+ TimeToSample *tts;
+ u32int numtts;
+
Moof *moof;
int nmoof;
@@ -281,6 +292,21 @@
return fmtstrcpy(f, t);
}
+static u32int
+tts(Track *t, u32int s)
+{+ u32int dt, n, e;
+
+ dt = 0;
+ for(e = 0; e < t->numtts && s > 0; e++){+ n = MIN(t->tts[e].samplecount, s);
+ dt += t->tts[e].sampledelta * n;
+ s -= n;
+ }
+
+ return dt;
+}
+
static void
printbox(Box *b)
{@@ -391,6 +417,11 @@
}
}else if(b->type == BoxStts){Bprint(&stderr, "\t%.*sentry_count\t%ud\n", dind, ind, b->stts.entrycount);
+ for(u = 0; dflag > 1 && u < b->stts.entrycount; u++){+ Bprint(&stderr, "\t%.*sentry[%zd]\n", dind, ind, u);
+ Bprint(&stderr, "\t\t%.*ssample_count\t%ud\n", dind, ind, b->stts.entry[u].samplecount);
+ Bprint(&stderr, "\t\t%.*ssamples_delta\t%ud\n", dind, ind, b->stts.entry[u].sampledelta);
+ }
}else if(b->type == BoxStss){Bprint(&stderr, "\t%.*sentry_count\t%ud\n", dind, ind, b->stss.entrycount);
}else if(b->type == BoxStsc){@@ -534,8 +565,8 @@
werrstr("eof");break;
}
- }else if(t->video.format == FmtAv01){- ts = 0;
+ }else if(t->video.format != 0){ /* all video goes out as IVF */+ ts = tts(t, sample);
frame[0] = samplesz;
frame[1] = samplesz >> 8;
frame[2] = samplesz >> 16;
@@ -996,7 +1027,15 @@
}else if(b->type == BoxStts){eBread(4, "entry_count");
b->stts.entrycount = bu32(d);
- /* FIXME not reading actual entries here */
+ b->stts.entry = calloc(b->stts.entrycount, sizeof(TimeToSample));
+ for(u = 0; u < b->stts.entrycount; u++){+ eBread(4, "sample_count");
+ b->stts.entry[u].samplecount = bu32(d);
+ eBread(4, "sample_delta");
+ b->stts.entry[u].sampledelta = bu32(d);
+ }
+ track.tts = b->stts.entry;
+ track.numtts = b->stts.entrycount;
printbox(b);
}else if(b->type == BoxStss){eBread(4, "entry_count");
--
⑨