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* missing part of the 3gp patch by Johannes Carlsson

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Originally committed as revision 1933 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Johannes Carlsson 2003-06-06 11:46:25 +00:00 committed by Zdenek Kabelac
parent 8f8c0800f8
commit 14342fd537
1 changed files with 100 additions and 20 deletions
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120
libavformat/mov.c
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@ -59,6 +59,10 @@
/* in case you can't read a file, try commenting */
#define MOV_SPLIT_CHUNKS
/* Special handling for movies created with Minolta Dimaxe Xi*/
/* this fix should not interfere with other .mov files, but just in case*/
#define MOV_MINOLTA_FIX
/* some streams in QT (and in MP4 mostly) aren't either video nor audio */
/* so we first list them as this, then clean up the list of streams we give back, */
/* getting rid of these */
@ -768,9 +772,10 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
st->codec.bits_per_sample = get_be16(pb); /* depth */
st->codec.color_table_id = get_be16(pb); /* colortable id */
/* These are set in mov_read_stts and might already be set!
st->codec.frame_rate = 25;
st->codec.frame_rate_base = 1;
*/
size -= (16+8*4+2+32+2*2);
#if 0
while (size >= 8) {
@ -878,7 +883,7 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
get_byte(pb); //frames_per_sample
#ifdef DEBUG
printf("Audio: damr_type=%c%c%c%c damr_size=%Ld damr_vendor=%c%c%c%c\n",
printf("Audio: damr_type=%c%c%c%c damr_size=%d damr_vendor=%c%c%c%c\n",
(damr_type >> 24) & 0xff,
(damr_type >> 16) & 0xff,
(damr_type >> 8) & 0xff,
@ -890,7 +895,7 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
(damr_vendor >> 0) & 0xff
);
#endif
st->time_length=0;//Not possible to get from this info, must count number of AMR frames
st->codec.sample_rate=8000;
st->codec.channels=1;
@ -898,9 +903,20 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
st->codec.bit_rate=0; /*It is not possible to tell this before we have
an audio frame and even then every frame can be different*/
}
else
{
get_be16(pb); /* version */
else if( st->codec.codec_tag == MKTAG( 'm', 'p', '4', 's' ))
{
//This is some stuff for the hint track, lets ignore it!
//Do some mp4 auto detect.
c->mp4=1;
size-=(16);
url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/
}
else if(size>=(16+20))
{//16 bytes read, reading atleast 20 more
#ifdef DEBUG
printf("audio size=0x%X\n",size);
#endif
uint16_t version = get_be16(pb); /* version */
get_be16(pb); /* revision level */
get_be32(pb); /* vendor */
@ -925,14 +941,51 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
default:
;
}
get_be32(pb); /* samples per packet */
get_be32(pb); /* bytes per packet */
get_be32(pb); /* bytes per frame */
get_be32(pb); /* bytes per sample */
{
MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };
mov_read_default(c, pb, a);
}
//Read QT version 1 fields. In version 0 theese dont exist
#ifdef DEBUG
printf("version =%d mp4=%d\n",version,c->mp4);
printf("size-(16+20+16)=%d\n",size-(16+20+16));
#endif
if((version==1) && size>=(16+20+16))
{
get_be32(pb); /* samples per packet */
get_be32(pb); /* bytes per packet */
get_be32(pb); /* bytes per frame */
get_be32(pb); /* bytes per sample */
if(size>(16+20+16))
{
//Optional, additional atom-based fields
#ifdef DEBUG
printf("offest=0x%X, sizeleft=%d=0x%x,format=%c%c%c%c\n",(int)url_ftell(pb),size - (16 + 20 + 16 ),size - (16 + 20 + 16 ),
(format >> 0) & 0xff,
(format >> 8) & 0xff,
(format >> 16) & 0xff,
(format >> 24) & 0xff);
#endif
MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };
mov_read_default(c, pb, a);
}
}
else
{
//We should be down to 0 bytes here, but lets make sure.
size-=(16+20);
#ifdef DEBUG
if(size>0)
printf("skipping 0x%X bytes\n",size-(16+20));
#endif
url_fskip(pb, size);
}
}
else
{
size-=16;
//Unknown size, but lets do our best and skip the rest.
#ifdef DEBUG
printf("Strange size, skipping 0x%X bytes\n",size);
#endif
url_fskip(pb, size);
}
}
}
@ -1043,16 +1096,43 @@ printf("track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
#endif
}
if(st->codec.codec_type==CODEC_TYPE_VIDEO)
#define MAX(a,b) a>b?a:b
#define MIN(a,b) a>b?b:a
/*The stsd atom which contain codec type sometimes comes after the stts so we cannot check for codec_type*/
if(duration>0)
{
//Find greatest common divisor to avoid overflow using the Euclidean Algorithm...
uint32_t max=MAX(duration,total_sample_count);
uint32_t min=MIN(duration,total_sample_count);
uint32_t spare=max%min;
while(spare!=0)
{
max=min;
min=spare;
spare=max%min;
}
duration/=min;
total_sample_count/=min;
//Only support constant frame rate. But lets calculate the average. Needed by .mp4-files created with nec e606 3g phone.
//Hmm, lets set base to 1
st->codec.frame_rate_base=1;
st->codec.frame_rate = st->codec.frame_rate_base * c->streams[c->total_streams]->time_scale * total_sample_count / duration;
//To get better precision, we use the duration as frame_rate_base
st->codec.frame_rate_base=duration;
st->codec.frame_rate = c->streams[c->total_streams]->time_scale * total_sample_count;
#ifdef DEBUG
printf("VIDEO FRAME RATE average= %i (tot sample count= %i ,tot dur= %i)\n", st->codec.frame_rate,total_sample_count,duration);
printf("FRAME RATE average (video or audio)= %f (tot sample count= %i ,tot dur= %i timescale=%d)\n", (float)st->codec.frame_rate/st->codec.frame_rate_base,total_sample_count,duration,c->streams[c->total_streams]->time_scale);
#endif
}
else
{
st->codec.frame_rate_base = 1;
st->codec.frame_rate = c->streams[c->total_streams]->time_scale;
}
#undef MAX
#undef MIN
return 0;
}
@ -1334,7 +1414,7 @@ static int mov_probe(AVProbeData *p)
return AVPROBE_SCORE_MAX;
case MKTAG( 'f', 't', 'y', 'p' ):
case MKTAG( 's', 'k', 'i', 'p' ):
offset = to_be32(p->buf) + offset;
offset = to_be32(p->buf+offset) + offset;
break;
default:
/* unrecognized tag */