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-rw-r--r--src/tag.c71
1 files changed, 70 insertions, 1 deletions
diff --git a/src/tag.c b/src/tag.c
index 73821c74e..d8af2b49f 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -267,13 +267,82 @@ int adtsParse(AacBuffer * b, float * length) {
}
else bytesPerFrame = 0;
if(framesPerSec!=0) *length = (float)frames/framesPerSec;
- else *length = 1;
return 1;
}
+#define AAC_MAX_CHANNELS 6
+
MpdTag * aacTagDup(char * utf8file) {
MpdTag * ret = NULL;
+ AacBuffer b;
+ size_t fileread;
+ size_t bread;
+ size_t tagsize;
+ float length = -1;
+
+ memset(&b,0,sizeof(AacBuffer));
+
+ blockSignals();
+
+ b.infile = fopen(rmp2amp(utf8ToFsCharset(utf8file)),"r");
+ if(b.infile == NULL) return NULL;
+
+ fseek(b.infile,0,SEEK_END);
+ fileread = ftell(b.infile);
+ fseek(b.infile,0,SEEK_SET);
+
+ b.buffer = malloc(FAAD_MIN_STREAMSIZE*AAC_MAX_CHANNELS);
+ memset(b.buffer,0,FAAD_MIN_STREAMSIZE*AAC_MAX_CHANNELS);
+
+ bread = fread(b.buffer,1,FAAD_MIN_STREAMSIZE*AAC_MAX_CHANNELS,b.infile);
+ b.bytesIntoBuffer = bread;
+ b.bytesConsumed = 0;
+ b.fileOffset = 0;
+
+ if(bread!=FAAD_MIN_STREAMSIZE*AAC_MAX_CHANNELS) b.atEof = 1;
+
+ tagsize = 0;
+ if(!memcmp(b.buffer,"ID3",3)) {
+ tagsize = (b.buffer[6] << 21) | (b.buffer[7] << 14) |
+ (b.buffer[8] << 7) | (b.buffer[9] << 0);
+
+ tagsize+=10;
+ advanceAacBuffer(&b,tagsize);
+ fillAacBuffer(&b);
+ }
+
+ if((b.buffer[0] == 0xFF) && ((b.buffer[1] & 0xF6) == 0xF0)) {
+ adtsParse(&b,&length);
+ fseek(b.infile,tagsize, SEEK_SET);
+
+ bread = fread(b.buffer,1,FAAD_MIN_STREAMSIZE*AAC_MAX_CHANNELS,
+ b.infile);
+ if(bread != FAAD_MIN_STREAMSIZE*AAC_MAX_CHANNELS) b.atEof = 1;
+ else b.atEof = 0;
+ b.bytesIntoBuffer = bread;
+ b.bytesConsumed = 0;
+ b.fileOffset = tagsize;
+ }
+ else if(memcmp(b.buffer,"ADIF",4) == 0) {
+ int bitRate;
+ int skipSize = (b.buffer[4] & 0x80) ? 9 : 0;
+ bitRate = ((unsigned int)(b.buffer[4 + skipSize] & 0x0F)<<19) |
+ ((unsigned int)b.buffer[5 + skipSize]<<11) |
+ ((unsigned int)b.buffer[6 + skipSize]<<3) |
+ ((unsigned int)b.buffer[7 + skipSize] & 0xE0);
+
+ length = fileread;
+ if(length!=0) length = length*8.0/bitRate;
+ }
+
+ if(b.buffer) free(b.buffer);
+ fclose(b.infile);
+
+ if(length>=0) {
+ if((ret = id3Dup(utf8file))==NULL) ret = newMpdTag();
+ ret->time = length+0.5;
+ }
return ret;
}