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fix stream class

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fix a infinite loop on corrupted streams

Originally committed as revision 4343 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-06-03 08:54:32 +00:00
parent 1d92cc2bf2
commit 01bd1ed2db
1 changed files with 23 additions and 22 deletions
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45
libavformat/nut.c
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@ -112,6 +112,8 @@ static char *info_table[][2]={
{"Cover" , "PNG"},
};
void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale);
static void update(NUTContext *nut, int stream_index, int64_t frame_start, int frame_type, int frame_code, int key_frame, int size, int64_t pts){
StreamContext *stream= &nut->stream[stream_index];
@ -576,14 +578,20 @@ static int nut_write_header(AVFormatContext *s)
/* stream headers */
for (i = 0; i < s->nb_streams; i++)
{
int nom, denom, gcd;
int nom, denom, ssize;
codec = &s->streams[i]->codec;
put_be64(bc, STREAM_STARTCODE);
put_packetheader(nut, bc, 120 + codec->extradata_size, 1);
put_v(bc, i /*s->streams[i]->index*/);
put_v(bc, (codec->codec_type == CODEC_TYPE_AUDIO) ? 32 : 0);
switch(codec->codec_type){
case CODEC_TYPE_VIDEO: put_v(bc, 0); break;
case CODEC_TYPE_AUDIO: put_v(bc, 1); break;
// case CODEC_TYPE_TEXT : put_v(bc, 2); break;
case CODEC_TYPE_DATA : put_v(bc, 3); break;
default: return -1;
}
if (codec->codec_tag)
put_vb(bc, codec->codec_tag);
else if (codec->codec_type == CODEC_TYPE_VIDEO)
@ -597,22 +605,8 @@ static int nut_write_header(AVFormatContext *s)
else
put_vb(bc, 0);
if (codec->codec_type == CODEC_TYPE_VIDEO)
{
nom = codec->time_base.den;
denom = codec->time_base.num;
}
else
{
nom = codec->sample_rate;
if(codec->frame_size>0)
denom= codec->frame_size;
else
denom= 1; //unlucky
}
gcd= ff_gcd(nom, denom);
nom /= gcd;
denom /= gcd;
ff_parse_specific_params(codec, &nom, &ssize, &denom);
nut->stream[i].rate_num= nom;
nut->stream[i].rate_den= denom;
av_set_pts_info(s->streams[i], 60, denom, nom);
@ -965,12 +959,19 @@ static int decode_stream_header(NUTContext *nut){
if (st->codec.codec_id == CODEC_ID_NONE)
av_log(s, AV_LOG_ERROR, "Unknown codec?!\n");
break;
case 32:
case 1:
case 32: //compatibility
st->codec.codec_type = CODEC_TYPE_AUDIO;
st->codec.codec_id = codec_get_wav_id(tmp);
if (st->codec.codec_id == CODEC_ID_NONE)
av_log(s, AV_LOG_ERROR, "Unknown codec?!\n");
break;
case 2:
// st->codec.codec_type = CODEC_TYPE_TEXT;
// break;
case 3:
st->codec.codec_type = CODEC_TYPE_DATA;
break;
default:
av_log(s, AV_LOG_ERROR, "Unknown stream class (%d)\n", class);
return -1;
@ -994,7 +995,7 @@ static int decode_stream_header(NUTContext *nut){
// url_fskip(bc, get_v(bc));
}
if (class == 0) /* VIDEO */
if (st->codec.codec_type == CODEC_TYPE_VIDEO) /* VIDEO */
{
st->codec.width = get_v(bc);
st->codec.height = get_v(bc);
@ -1002,7 +1003,7 @@ static int decode_stream_header(NUTContext *nut){
st->codec.sample_aspect_ratio.den= get_v(bc);
get_v(bc); /* csp type */
}
if (class == 32) /* AUDIO */
if (st->codec.codec_type == CODEC_TYPE_AUDIO) /* AUDIO */
{
st->codec.sample_rate = get_v(bc);
get_v(bc); // samplerate_den
@ -1100,7 +1101,7 @@ static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap)
pos=0;
for(inited_stream_count=0; inited_stream_count < nut->stream_count;){
pos= find_startcode(bc, STREAM_STARTCODE, pos)+1;
if (pos<0){
if (pos<0+1){
av_log(s, AV_LOG_ERROR, "not all stream headers found\n");
return -1;
}