AIFF format support by (Patrick Guimond <patg a.t patg d.o.t homeunix d.o.t org)

Originally committed as revision 4924 to svn://svn.ffmpeg.org/ffmpeg/trunk

Changelog

@@ -33,6 +33,7 @@ version <next>
 - CamStudio video decoder
 - build system improvements
 - tabs and trailing whitespace removed from the codebase
+- AIFF/AIFF-C audio format, encoding and decoding
 
 version 0.4.9-pre1:
 

libavformat/Makefile

@@ -22,7 +22,7 @@ OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o img2.o raw.o rm.o \
       yuv4mpeg.o 4xm.o flvdec.o psxstr.o idroq.o ipmovie.o \
       nut.o wc3movie.o mp3.o westwood.o segafilm.o idcin.o flic.o \
       sierravmd.o matroska.o sol.o electronicarts.o nsvdec.o asf.o \
-      ogg2.o oggparsevorbis.o oggparsetheora.o oggparseflac.o daud.o
+      ogg2.o oggparsevorbis.o oggparsetheora.o oggparseflac.o daud.o aiff.o
 
 # muxers
 ifeq ($(CONFIG_MUXERS),yes)

libavformat/allformats.c

@@ -54,6 +54,7 @@ void av_register_all(void)
     ff_mmf_init();
     swf_init();
     au_init();
+    ff_aiff_init();
 #ifdef CONFIG_MUXERS
     gif_init();
 #endif //CONFIG_MUXERS

libavformat/avformat.h

@@ -549,6 +549,9 @@ int nsvdec_init(void);
 /* daud.c */
 int daud_init(void);
 
+/* aiff.c */
+int ff_aiff_init(void);
+
 #include "rtp.h"
 
 #include "rtsp.h"

libavutil/intfloat_readwrite.c

@@ -38,6 +38,23 @@ float av_int2flt(int32_t v){
     return ldexp(((v&0x7FFFFF) + (1<<23)) * (v>>31|1), (v>>23&0xFF)-150);
 }
 
+double av_ext2dbl(const AVExtFloat ext){
+    uint64_t m = 0;
+    int e, i;
+
+    for (i = 0; i < 8; i++)
+        m |= (uint64_t)ext.mantissa[i]<<(56-(i<<3));
+    e = (((int)ext.exponent[0]&0x7f)<<8) | ext.exponent[1];
+    if (e == 0x7fff && m)
+        return 0.0/0.0;
+    e -= 16383 + 63;        /* In IEEE 80 bits, the whole (i.e. 1.xxxx)
+                             * mantissa bit is written as opposed to the
+                             * single and double precision formats */
+    if (ext.exponent[0]&0x80)
+        return ldexp(-m, e);
+    return ldexp(m, e);
+}
+
 int64_t av_dbl2int(double d){
     int e;
     if     ( !d) return 0;
@@ -53,3 +70,29 @@ int32_t av_flt2int(float d){
     d= frexp(d, &e);
     return (d<0)<<31 | (e+126)<<23 | (int64_t)((fabs(d)-0.5)*(1<<24));
 }
+
+AVExtFloat av_dbl2ext(double d){
+    struct AVExtFloat ext;
+    int e, i; double f; uint64_t m;
+
+    f = fabs(frexp(d, &e));
+    if (f >= 0.5 && f < 1) {
+        e += 16382;
+        ext.exponent[0] = e>>8;
+        ext.exponent[1] = e;
+        m = (uint64_t)ldexp(f, 64);
+        for (i=0; i < 8; i++)
+            ext.mantissa[i] = m>>(56-(i<<3));
+    } else if (f == 0.0) {
+        memset (&ext, 0, 10);
+    } else {
+        ext.exponent[0] = 0x7f; ext.exponent[1] = 0xff;
+        memset (&ext.mantissa, 0, 8);
+        if (f != 1/0.0)
+            ext.mantissa[0] = ~0;
+    }
+    if (d < 0)
+        ext.exponent[0] |= 0x80;
+    return ext;
+}
+

libavutil/intfloat_readwrite.h

@@ -3,9 +3,17 @@
 
 #include "common.h"
 
+/* IEEE 80 bits extended float */
+typedef struct AVExtFloat  {
+    uint8_t exponent[2];
+    uint8_t mantissa[8];
+} AVExtFloat;
+
 double av_int2dbl(int64_t v);
 float av_int2flt(int32_t v);
+double av_ext2dbl(const AVExtFloat ext);
 int64_t av_dbl2int(double d);
 int32_t av_flt2int(float d);
+AVExtFloat av_dbl2ext(double d);
 
 #endif /* INTFLOAT_READWRITE_H */

tests/libav.regression.ref

@@ -62,6 +62,9 @@ e2a6d6fae17394dfe87cb5bb8ae11837 *./data/b-libav.al
 20f9fa55b3c5bebe3520f5667ee4928b *./data/b-libav.mmf
   22609 ./data/b-libav.mmf
 ./data/b-libav.mmf CRC=0x7e78cffe
+a324baee6d76c53ab7c74616cfc31616 *./data/b-libav.aif
+  89168 ./data/b-libav.aif
+./data/b-libav.aif CRC=0x2a09519c
 ce356ce2708cb6033ab5d762da93cfd4 *./data/b-libav-yuv420p.yuv
  304128 ./data/b-libav-yuv420p.yuv
 ce356ce2708cb6033ab5d762da93cfd4 *./data/b-libav-yuv422p.yuv

tests/regression.sh

@@ -696,6 +696,11 @@ file=${outfile}libav.mmf
 do_ffmpeg $file -t 1 -y -qscale 10 -f s16le -i $pcm_src $file
 do_ffmpeg_crc $file -i $file
 
+# aiff
+file=${outfile}libav.aif
+do_ffmpeg $file -t 1 -y -qscale 10 -f s16le -i $pcm_src $file
+do_ffmpeg_crc $file -i $file
+
 ####################
 # pix_fmt conversions
 conversions="yuv420p yuv422p yuv444p yuv422 yuv410p yuv411p yuvj420p \