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check the first two packets

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This commit is contained in:
Frédéric Mangano 2013-01-01 13:37:09 +01:00
parent e4db7cbebd
commit 62a65af712
1 changed files with 11 additions and 2 deletions
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13
opustags.c
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@ -36,7 +36,6 @@ int main(int argc, char **argv){
continue;
}
// We got a page.
puts("got a page");
if(packet_count == -1){ // First page
if(ogg_stream_init(&os, ogg_page_serialno(&og)) == -1){
error = "ogg_stream_init: unsuccessful";
@ -50,7 +49,15 @@ int main(int argc, char **argv){
}
if(ogg_stream_packetout(&os, &op) == 1){
packet_count++;
puts("got a packet");
if(packet_count == 1){ // Identification header
if(strncmp((char*) op.packet, "OpusHead", 8) != 0)
error = "opustags: invalid identification header";
}
if(packet_count == 2){ // Comment header
if(strncmp((char*) op.packet, "OpusTags", 8) != 0)
error = "opustags: invalid comment header";
break;
}
}
if(ogg_stream_check(&os) != 0)
error = "ogg_stream_check: internal error";
@ -59,6 +66,8 @@ int main(int argc, char **argv){
ogg_stream_clear(&os);
ogg_sync_clear(&oy);
fclose(in);
if(!error && packet_count < 2)
error = "opustags: invalid file";
if(error){
fprintf(stderr, "%s\n", error);
return EXIT_FAILURE;