move common stuff from avienc.c and wav.c to new file riff.c

Originally committed as revision 5720 to svn://svn.ffmpeg.org/ffmpeg/trunk

23 files changed, 528 insertions, 498 deletions

diff --git a/libavformat/Makefile b/libavformat/Makefile
index ef9cdd4405..e512e24a44 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -16,17 +16,17 @@ HEADERS = avformat.h avio.h rtp.h rtsp.h rtspcodes.h
 # muxers/demuxers
 OBJS-$(CONFIG_FOURXM_DEMUXER)            += 4xm.o
 OBJS-$(CONFIG_ADTS_MUXER)                += adtsenc.o
-OBJS-$(CONFIG_AIFF_DEMUXER)              += aiff.o
-OBJS-$(CONFIG_AIFF_MUXER)                += aiff.o
+OBJS-$(CONFIG_AIFF_DEMUXER)              += aiff.o riff.o
+OBJS-$(CONFIG_AIFF_MUXER)                += aiff.o riff.o
 OBJS-$(CONFIG_AMR_DEMUXER)               += amr.o
 OBJS-$(CONFIG_AMR_MUXER)                 += amr.o
-OBJS-$(CONFIG_ASF_DEMUXER)               += asf.o
-OBJS-$(CONFIG_ASF_MUXER)                 += asf-enc.o
-OBJS-$(CONFIG_ASF_STREAM_MUXER)          += asf-enc.o
-OBJS-$(CONFIG_AU_DEMUXER)                += au.o
-OBJS-$(CONFIG_AU_MUXER)                  += au.o
-OBJS-$(CONFIG_AVI_DEMUXER)               += avidec.o
-OBJS-$(CONFIG_AVI_MUXER)                 += avienc.o
+OBJS-$(CONFIG_ASF_DEMUXER)               += asf.o riff.o
+OBJS-$(CONFIG_ASF_MUXER)                 += asf-enc.o riff.o
+OBJS-$(CONFIG_ASF_STREAM_MUXER)          += asf-enc.o riff.o
+OBJS-$(CONFIG_AU_DEMUXER)                += au.o riff.o
+OBJS-$(CONFIG_AU_MUXER)                  += au.o riff.o
+OBJS-$(CONFIG_AVI_DEMUXER)               += avidec.o riff.o
+OBJS-$(CONFIG_AVI_MUXER)                 += avienc.o riff.o
 OBJS-$(CONFIG_AVS_DEMUXER)               += avs.o
 OBJS-$(CONFIG_CRC_MUXER)                 += crc.o
 OBJS-$(CONFIG_FRAMECRC_MUXER)            += crc.o
@@ -53,16 +53,16 @@ OBJS-$(CONFIG_IMAGEPIPE_DEMUXER)         += img.o
 OBJS-$(CONFIG_IMAGE_MUXER)               += img.o
 OBJS-$(CONFIG_IMAGEPIPE_MUXER)           += img.o
 OBJS-$(CONFIG_IPMOVIE_DEMUXER)           += ipmovie.o
-OBJS-$(CONFIG_MATROSKA_DEMUXER)          += matroska.o
+OBJS-$(CONFIG_MATROSKA_DEMUXER)          += matroska.o riff.o
 OBJS-$(CONFIG_MM_DEMUXER)                += mm.o
-OBJS-$(CONFIG_MMF_DEMUXER)               += mmf.o
-OBJS-$(CONFIG_MMF_MUXER)                 += mmf.o
-OBJS-$(CONFIG_MOV_DEMUXER)               += mov.o
-OBJS-$(CONFIG_MOV_MUXER)                 += movenc.o
-OBJS-$(CONFIG_TGP_MUXER)                 += movenc.o
-OBJS-$(CONFIG_MP4_MUXER)                 += movenc.o
-OBJS-$(CONFIG_PSP_MUXER)                 += movenc.o
-OBJS-$(CONFIG_TG2_MUXER)                 += movenc.o
+OBJS-$(CONFIG_MMF_DEMUXER)               += mmf.o riff.o
+OBJS-$(CONFIG_MMF_MUXER)                 += mmf.o riff.o
+OBJS-$(CONFIG_MOV_DEMUXER)               += mov.o riff.o
+OBJS-$(CONFIG_MOV_MUXER)                 += movenc.o riff.o
+OBJS-$(CONFIG_TGP_MUXER)                 += movenc.o riff.o
+OBJS-$(CONFIG_MP4_MUXER)                 += movenc.o riff.o
+OBJS-$(CONFIG_PSP_MUXER)                 += movenc.o riff.o
+OBJS-$(CONFIG_TG2_MUXER)                 += movenc.o riff.o
 OBJS-$(CONFIG_MP3_DEMUXER)               += mp3.o
 OBJS-$(CONFIG_MP2_MUXER)                 += mp3.o
 OBJS-$(CONFIG_MP3_MUXER)                 += mp3.o
@@ -75,15 +75,16 @@ OBJS-$(CONFIG_MPEGPS_DEMUXER)            += mpeg.o
 OBJS-$(CONFIG_MPEGTS_DEMUXER)            += mpegts.o
 OBJS-$(CONFIG_MPEGTS_MUXER)              += mpegtsenc.o
 OBJS-$(CONFIG_MPJPEG_MUXER)              += mpjpeg.o
-OBJS-$(CONFIG_NSV_DEMUXER)               += nsvdec.o
-OBJS-$(CONFIG_NUT_DEMUXER)               += nut.o
-OBJS-$(CONFIG_NUT_MUXER)                 += nut.o
-OBJS-$(CONFIG_NUV_DEMUXER)               += nuv.o
+OBJS-$(CONFIG_NSV_DEMUXER)               += nsvdec.o riff.o
+OBJS-$(CONFIG_NUT_DEMUXER)               += nut.o riff.o
+OBJS-$(CONFIG_NUT_MUXER)                 += nut.o riff.o
+OBJS-$(CONFIG_NUV_DEMUXER)               += nuv.o riff.o
 OBJS-$(CONFIG_OGG_DEMUXER)               += ogg2.o           \
                                             oggparsevorbis.o \
                                             oggparsetheora.o \
                                             oggparseflac.o   \
-                                            oggparseogm.o
+                                            oggparseogm.o    \
+                                            riff.o
 OBJS-$(CONFIG_STR_DEMUXER)               += psxstr.o
 OBJS-$(CONFIG_SHORTEN_DEMUXER)           += raw.o
 OBJS-$(CONFIG_FLAC_DEMUXER)              += raw.o
@@ -118,10 +119,10 @@ OBJS-$(CONFIG_SOL_DEMUXER)               += sol.o
 OBJS-$(CONFIG_SWF_DEMUXER)               += swf.o
 OBJS-$(CONFIG_SWF_MUXER)                 += swf.o
 OBJS-$(CONFIG_TTA_DEMUXER)               += tta.o
-OBJS-$(CONFIG_VOC_DEMUXER)               += voc.o
-OBJS-$(CONFIG_VOC_MUXER)                 += voc.o
-OBJS-$(CONFIG_WAV_DEMUXER)               += wav.o
-OBJS-$(CONFIG_WAV_MUXER)                 += wav.o
+OBJS-$(CONFIG_VOC_DEMUXER)               += voc.o riff.o
+OBJS-$(CONFIG_VOC_MUXER)                 += voc.o riff.o
+OBJS-$(CONFIG_WAV_DEMUXER)               += wav.o riff.o
+OBJS-$(CONFIG_WAV_MUXER)                 += wav.o riff.o
 OBJS-$(CONFIG_WC3_DEMUXER)               += wc3movie.o
 OBJS-$(CONFIG_WSAUD_DEMUXER)             += westwood.o
 OBJS-$(CONFIG_WSVQA_DEMUXER)             += westwood.o
diff --git a/libavformat/aiff.c b/libavformat/aiff.c
index de2afee533..1855db2b15 100644
--- a/libavformat/aiff.c
+++ b/libavformat/aiff.c
@@ -18,7 +18,7 @@
  */
 #include "avformat.h"
 #include "allformats.h"
-#include "avi.h"
+#include "riff.h"
 #include "intfloat_readwrite.h"
 
 const CodecTag codec_aiff_tags[] = {
diff --git a/libavformat/asf-enc.c b/libavformat/asf-enc.c
index d8cc28a2c0..f885bb7433 100644
--- a/libavformat/asf-enc.c
+++ b/libavformat/asf-enc.c
@@ -17,7 +17,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
-#include "avi.h"
+#include "riff.h"
 #include "asf.h"
 
 #undef NDEBUG
diff --git a/libavformat/asf.c b/libavformat/asf.c
index b0122dac48..38a308bd56 100644
--- a/libavformat/asf.c
+++ b/libavformat/asf.c
@@ -17,7 +17,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
-#include "avi.h"
+#include "riff.h"
 #include "mpegaudio.h"
 #include "asf.h"
 
diff --git a/libavformat/au.c b/libavformat/au.c
index 5f15749d9c..bb76c90495 100644
--- a/libavformat/au.c
+++ b/libavformat/au.c
@@ -27,7 +27,7 @@
 
 #include "avformat.h"
 #include "allformats.h"
-#include "avi.h"
+#include "riff.h"
 
 /* if we don't know the size in advance */
 #define AU_UNKOWN_SIZE ((uint32_t)(~0))
diff --git a/libavformat/avi.h b/libavformat/avi.h
index 33cb53736b..05f193b619 100644
--- a/libavformat/avi.h
+++ b/libavformat/avi.h
@@ -16,28 +16,4 @@
 /* index flags */
 #define AVIIF_INDEX             0x10
 
-offset_t start_tag(ByteIOContext *pb, const char *tag);
-void end_tag(ByteIOContext *pb, offset_t start);
-
-typedef struct CodecTag {
-    int id;
-    unsigned int tag;
-    unsigned int invalid_asf : 1;
-} CodecTag;
-
-void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf);
-int put_wav_header(ByteIOContext *pb, AVCodecContext *enc);
-int wav_codec_get_id(unsigned int tag, int bps);
-void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size);
-
-extern const CodecTag codec_bmp_tags[];
-extern const CodecTag codec_wav_tags[];
-
-unsigned int codec_get_tag(const CodecTag *tags, int id);
-enum CodecID codec_get_id(const CodecTag *tags, unsigned int tag);
-unsigned int codec_get_bmp_tag(int id);
-unsigned int codec_get_wav_tag(int id);
-enum CodecID codec_get_bmp_id(unsigned int tag);
-enum CodecID codec_get_wav_id(unsigned int tag);
-
 #endif /* FFMPEG_AVI_H */
diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index ef8564bb90..1c4ee6affe 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -19,6 +19,7 @@
 #include "avformat.h"
 #include "avi.h"
 #include "dv.h"
+#include "riff.h"
 
 #undef NDEBUG
 #include <assert.h>
diff --git a/libavformat/avienc.c b/libavformat/avienc.c
index 1447e80063..98ce333cd9 100644
--- a/libavformat/avienc.c
+++ b/libavformat/avienc.c
@@ -18,6 +18,7 @@
  */
 #include "avformat.h"
 #include "avi.h"
+#include "riff.h"
 
 /*
  * TODO:
@@ -55,255 +56,6 @@ static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id)
     return &idx->cluster[cl][id];
 }
 
-offset_t start_tag(ByteIOContext *pb, const char *tag)
-{
-    put_tag(pb, tag);
-    put_le32(pb, 0);
-    return url_ftell(pb);
-}
-
-void end_tag(ByteIOContext *pb, offset_t start)
-{
-    offset_t pos;
-
-    pos = url_ftell(pb);
-    url_fseek(pb, start - 4, SEEK_SET);
-    put_le32(pb, (uint32_t)(pos - start));
-    url_fseek(pb, pos, SEEK_SET);
-}
-#endif //CONFIG_AVI_MUXER
-
-/* Note: when encoding, the first matching tag is used, so order is
-   important if multiple tags possible for a given codec. */
-const CodecTag codec_bmp_tags[] = {
-    { CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
-    { CODEC_ID_H264, MKTAG('h', '2', '6', '4') },
-    { CODEC_ID_H264, MKTAG('X', '2', '6', '4') },
-    { CODEC_ID_H264, MKTAG('x', '2', '6', '4') },
-    { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
-    { CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },
-
-    { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
-    { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
-    { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
-    { CODEC_ID_H261, MKTAG('H', '2', '6', '1') },
-
-    /* added based on MPlayer */
-    { CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },
-    { CODEC_ID_H263P, MKTAG('v', 'i', 'v', '1') },
-
-    { CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4')},
-    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X'), .invalid_asf = 1 },
-    { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0'), .invalid_asf = 1 },
-    { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D'), .invalid_asf = 1 },
-    { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
-    { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
-    { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
-
-    /* added based on MPlayer */
-    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
-    { CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
-    { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
-    { CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
-    { CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },
-    { CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },
-
-    { CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },
-
-    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3'), .invalid_asf = 1 }, /* default signature when using MSMPEG4 */
-    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
-
-    /* added based on MPlayer */
-    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
-    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
-    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
-    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
-    { CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
-    { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
-    { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
-
-    { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
-
-    /* added based on MPlayer */
-    { CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
-
-    { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
-
-    { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
-
-    /* added based on MPlayer */
-    { CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
-    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
-    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
-    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
-    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
-    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
-    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
-    { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },
-    { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },
-    { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
-    { CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
-    { CODEC_ID_MPEG1VIDEO, 0x10000001 },
-    { CODEC_ID_MPEG2VIDEO, 0x10000002 },
-    { CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },
-    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
-    { CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
-    { CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
-    { CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
-    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
-    { CODEC_ID_JPEGLS, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
-    { CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
-    { CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },
-    { CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
-    { CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
-    { CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },
-    { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
-    { CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },
-    { CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },
-    { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
-    { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
-    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
-    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
-    { CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
-    { CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
-    { CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
-    { CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
-    { CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
-    { CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
-    { CODEC_ID_MSRLE, MKTAG(0x1, 0x0, 0x0, 0x0) },
-    { CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
-    { CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
-    { CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
-    { CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
-    { CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
-    { CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
-    { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
-    { CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },
-    { CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },
-    { CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },
-    { CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },
-    { CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },
-    { CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },
-    { CODEC_ID_FLASHSV, MKTAG('F', 'S', 'V', '1') },
-    { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },
-    { CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },
-    { CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },
-    { CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },
-    { CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },
-    { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },
-    { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },
-    { CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },
-    { CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },
-    { CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },
-    { CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },
-    { CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },
-    { CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },
-    { CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
-    { CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
-    { CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
-    { CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
-    { CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },
-    { CODEC_ID_RAWVIDEO, 0 },
-    { CODEC_ID_NONE, 0 },
-};
-
-unsigned int codec_get_tag(const CodecTag *tags, int id)
-{
-    while (tags->id != CODEC_ID_NONE) {
-        if (tags->id == id)
-            return tags->tag;
-        tags++;
-    }
-    return 0;
-}
-
-static unsigned int codec_get_asf_tag(const CodecTag *tags, unsigned int id)
-{
-    while (tags->id != CODEC_ID_NONE) {
-        if (!tags->invalid_asf && tags->id == id)
-            return tags->tag;
-        tags++;
-    }
-    return 0;
-}
-
-enum CodecID codec_get_id(const CodecTag *tags, unsigned int tag)
-{
-    while (tags->id != CODEC_ID_NONE) {
-        if(   toupper((tag >> 0)&0xFF) == toupper((tags->tag >> 0)&0xFF)
-           && toupper((tag >> 8)&0xFF) == toupper((tags->tag >> 8)&0xFF)
-           && toupper((tag >>16)&0xFF) == toupper((tags->tag >>16)&0xFF)
-           && toupper((tag >>24)&0xFF) == toupper((tags->tag >>24)&0xFF))
-            return tags->id;
-        tags++;
-    }
-    return CODEC_ID_NONE;
-}
-
-unsigned int codec_get_bmp_tag(int id)
-{
-    return codec_get_tag(codec_bmp_tags, id);
-}
-
-unsigned int codec_get_wav_tag(int id)
-{
-    return codec_get_tag(codec_wav_tags, id);
-}
-
-enum CodecID codec_get_bmp_id(unsigned int tag)
-{
-    return codec_get_id(codec_bmp_tags, tag);
-}
-
-enum CodecID codec_get_wav_id(unsigned int tag)
-{
-    return codec_get_id(codec_wav_tags, tag);
-}
-
-#ifdef CONFIG_AVI_MUXER
-/* BITMAPINFOHEADER header */
-void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf)
-{
-    put_le32(pb, 40 + enc->extradata_size); /* size */
-    put_le32(pb, enc->width);
-    put_le32(pb, enc->height);
-    put_le16(pb, 1); /* planes */
-
-    put_le16(pb, enc->bits_per_sample ? enc->bits_per_sample : 24); /* depth */
-    /* compression type */
-    put_le32(pb, for_asf ? (enc->codec_tag ? enc->codec_tag : codec_get_asf_tag(tags, enc->codec_id)) : enc->codec_tag); //
-    put_le32(pb, enc->width * enc->height * 3);
-    put_le32(pb, 0);
-    put_le32(pb, 0);
-    put_le32(pb, 0);
-    put_le32(pb, 0);
-
-    put_buffer(pb, enc->extradata, enc->extradata_size);
-
-    if (enc->extradata_size & 1)
-        put_byte(pb, 0);
-}
-
-void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
-{
-    int gcd;
-
-    *au_ssize= stream->block_align;
-    if(stream->frame_size && stream->sample_rate){
-        *au_scale=stream->frame_size;
-        *au_rate= stream->sample_rate;
-    }else if(stream->codec_type == CODEC_TYPE_VIDEO){
-        *au_scale= stream->time_base.num;
-        *au_rate = stream->time_base.den;
-    }else{
-        *au_scale= stream->block_align ? stream->block_align*8 : 8;
-        *au_rate = stream->bit_rate;
-    }
-    gcd= ff_gcd(*au_scale, *au_rate);
-    *au_scale /= gcd;
-    *au_rate /= gcd;
-}
-
 static offset_t avi_start_new_riff(AVIContext *avi, ByteIOContext *pb,
                                    const char* riff_tag, const char* list_tag)
 {
diff --git a/libavformat/gxf.c b/libavformat/gxf.c
index 3e854773bf..7cc1d39108 100644
--- a/libavformat/gxf.c
+++ b/libavformat/gxf.c
@@ -17,7 +17,6 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
-#include "avi.h"
 
 typedef enum {
     PKT_MAP = 0xbc,
diff --git a/libavformat/matroska.c b/libavformat/matroska.c
index f36047e215..d22e85f2c2 100644
--- a/libavformat/matroska.c
+++ b/libavformat/matroska.c
@@ -28,7 +28,7 @@
 
 #include "avformat.h"
 /* For codec_get_bmp_id and codec_get_wav_id. */
-#include "avi.h"
+#include "riff.h"
 #include "intfloat_readwrite.h"
 
 /* EBML version supported */
diff --git a/libavformat/mmf.c b/libavformat/mmf.c
index bcee86bba9..87fc00bf3f 100644
--- a/libavformat/mmf.c
+++ b/libavformat/mmf.c
@@ -18,7 +18,7 @@
  */
 #include "avformat.h"
 #include "allformats.h"
-#include "avi.h"
+#include "riff.h"
 
 typedef struct {
     offset_t atrpos, atsqpos, awapos;
diff --git a/libavformat/mov.c b/libavformat/mov.c
index fe252a7c19..5375a1cde6 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -22,7 +22,7 @@
 //#define DEBUG
 
 #include "avformat.h"
-#include "avi.h"
+#include "riff.h"
 #include "mov.h"
 
 #ifdef CONFIG_ZLIB
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 969104d631..37c118c3d9 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -18,7 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
-#include "avi.h"
+#include "riff.h"
 #include "avio.h"
 #include "mov.h"
 
diff --git a/libavformat/nsvdec.c b/libavformat/nsvdec.c
index 5ae5b8c061..e4c7c9fa84 100644
--- a/libavformat/nsvdec.c
+++ b/libavformat/nsvdec.c
@@ -17,7 +17,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
-#include "avi.h"
+#include "riff.h"
 
 #define DEBUG
 //#define DEBUG_DUMP_INDEX // XXX dumbdriving-271.nsv breaks with it commented!!
diff --git a/libavformat/nut.c b/libavformat/nut.c
index 09bd12082d..0bb242a5c2 100644
--- a/libavformat/nut.c
+++ b/libavformat/nut.c
@@ -33,7 +33,7 @@
 #include <limits.h>
 #include "avformat.h"
 #include "mpegaudio.h"
-#include "avi.h"
+#include "riff.h"
 
 #undef NDEBUG
 #include <assert.h>
diff --git a/libavformat/nuv.c b/libavformat/nuv.c
index 4364cd4276..071ea7e68e 100644
--- a/libavformat/nuv.c
+++ b/libavformat/nuv.c
@@ -17,7 +17,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
-#include "avi.h"
+#include "riff.h"
 
 typedef struct {
     int v_id;
diff --git a/libavformat/oggparseogm.c b/libavformat/oggparseogm.c
index 0e25dcc1eb..8788e5d410 100644
--- a/libavformat/oggparseogm.c
+++ b/libavformat/oggparseogm.c
@@ -27,7 +27,7 @@
 #include "bitstream.h"
 #include "bswap.h"
 #include "ogg2.h"
-#include "avi.h"
+#include "riff.h"
 
 static int
 ogm_header(AVFormatContext *s, int idx)
diff --git a/libavformat/riff.c b/libavformat/riff.c
new file mode 100644
index 0000000000..8f0d030d98
--- /dev/null
+++ b/libavformat/riff.c
@@ -0,0 +1,452 @@
+/*
+ * RIFF codec tags
+ * Copyright (c) 2000 Fabrice Bellard.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avformat.h"
+#include "avcodec.h"
+#include "riff.h"
+
+/* Note: when encoding, the first matching tag is used, so order is
+   important if multiple tags possible for a given codec. */
+const CodecTag codec_bmp_tags[] = {
+    { CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
+    { CODEC_ID_H264, MKTAG('h', '2', '6', '4') },
+    { CODEC_ID_H264, MKTAG('X', '2', '6', '4') },
+    { CODEC_ID_H264, MKTAG('x', '2', '6', '4') },
+    { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
+    { CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },
+
+    { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
+    { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
+    { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
+    { CODEC_ID_H261, MKTAG('H', '2', '6', '1') },
+
+    /* added based on MPlayer */
+    { CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },
+    { CODEC_ID_H263P, MKTAG('v', 'i', 'v', '1') },
+
+    { CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4')},
+    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X'), .invalid_asf = 1 },
+    { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0'), .invalid_asf = 1 },
+    { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D'), .invalid_asf = 1 },
+    { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
+    { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
+    { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
+
+    /* added based on MPlayer */
+    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
+    { CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
+    { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
+    { CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
+    { CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },
+    { CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },
+
+    { CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },
+
+    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3'), .invalid_asf = 1 }, /* default signature when using MSMPEG4 */
+    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
+
+    /* added based on MPlayer */
+    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
+    { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
+
+    { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
+
+    /* added based on MPlayer */
+    { CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
+
+    { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
+
+    { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
+
+    /* added based on MPlayer */
+    { CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
+    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
+    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
+    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
+    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
+    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
+    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
+    { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },
+    { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },
+    { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
+    { CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
+    { CODEC_ID_MPEG1VIDEO, 0x10000001 },
+    { CODEC_ID_MPEG2VIDEO, 0x10000002 },
+    { CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },
+    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
+    { CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
+    { CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
+    { CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
+    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
+    { CODEC_ID_JPEGLS, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
+    { CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
+    { CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },
+    { CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
+    { CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
+    { CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },
+    { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
+    { CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },
+    { CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },
+    { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
+    { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
+    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
+    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
+    { CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
+    { CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
+    { CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
+    { CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
+    { CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
+    { CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
+    { CODEC_ID_MSRLE, MKTAG(0x1, 0x0, 0x0, 0x0) },
+    { CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
+    { CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
+    { CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
+    { CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
+    { CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
+    { CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
+    { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
+    { CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },
+    { CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },
+    { CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },
+    { CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },
+    { CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },
+    { CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },
+    { CODEC_ID_FLASHSV, MKTAG('F', 'S', 'V', '1') },
+    { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },
+    { CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },
+    { CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },
+    { CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },
+    { CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },
+    { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },
+    { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },
+    { CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },
+    { CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },
+    { CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },
+    { CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },
+    { CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },
+    { CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },
+    { CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
+    { CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
+    { CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
+    { CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
+    { CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },
+    { CODEC_ID_RAWVIDEO, 0 },
+    { CODEC_ID_NONE, 0 },
+};
+
+const CodecTag codec_wav_tags[] = {
+    { CODEC_ID_MP2, 0x50 },
+    { CODEC_ID_MP3, 0x55 },
+    { CODEC_ID_AC3, 0x2000 },
+    { CODEC_ID_DTS, 0x2001 },
+    { CODEC_ID_PCM_S16LE, 0x01 },
+    { CODEC_ID_PCM_U8, 0x01 }, /* must come after s16le in this list */
+    { CODEC_ID_PCM_S24LE, 0x01 },
+    { CODEC_ID_PCM_S32LE, 0x01 },
+    { CODEC_ID_PCM_ALAW, 0x06 },
+    { CODEC_ID_PCM_MULAW, 0x07 },
+    { CODEC_ID_ADPCM_MS, 0x02 },
+    { CODEC_ID_ADPCM_IMA_WAV, 0x11 },
+    { CODEC_ID_ADPCM_YAMAHA, 0x20 },
+    { CODEC_ID_ADPCM_G726, 0x45 },
+    { CODEC_ID_ADPCM_IMA_DK4, 0x61 },  /* rogue format number */
+    { CODEC_ID_ADPCM_IMA_DK3, 0x62 },  /* rogue format number */
+    { CODEC_ID_WMAV1, 0x160 },
+    { CODEC_ID_WMAV2, 0x161 },
+    { CODEC_ID_AAC, 0x706d },
+    { CODEC_ID_VORBIS, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
+    { CODEC_ID_SONIC, 0x2048 },
+    { CODEC_ID_SONIC_LS, 0x2048 },
+    { CODEC_ID_ADPCM_CT, 0x200 },
+    { CODEC_ID_ADPCM_SWF, ('S'<<8)+'F' },
+    { CODEC_ID_TRUESPEECH, 0x22 },
+
+    // for NuppelVideo (nuv.c)
+    { CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
+    { CODEC_ID_MP3, MKTAG('L', 'A', 'M', 'E') },
+    { 0, 0 },
+};
+
+unsigned int codec_get_tag(const CodecTag *tags, int id)
+{
+    while (tags->id != CODEC_ID_NONE) {
+        if (tags->id == id)
+            return tags->tag;
+        tags++;
+    }
+    return 0;
+}
+
+unsigned int codec_get_asf_tag(const CodecTag *tags, unsigned int id)
+{
+    while (tags->id != CODEC_ID_NONE) {
+        if (!tags->invalid_asf && tags->id == id)
+            return tags->tag;
+        tags++;
+    }
+    return 0;
+}
+
+enum CodecID codec_get_id(const CodecTag *tags, unsigned int tag)
+{
+    while (tags->id != CODEC_ID_NONE) {
+        if(   toupper((tag >> 0)&0xFF) == toupper((tags->tag >> 0)&0xFF)
+           && toupper((tag >> 8)&0xFF) == toupper((tags->tag >> 8)&0xFF)
+           && toupper((tag >>16)&0xFF) == toupper((tags->tag >>16)&0xFF)
+           && toupper((tag >>24)&0xFF) == toupper((tags->tag >>24)&0xFF))
+            return tags->id;
+        tags++;
+    }
+    return CODEC_ID_NONE;
+}
+
+unsigned int codec_get_bmp_tag(int id)
+{
+    return codec_get_tag(codec_bmp_tags, id);
+}
+
+unsigned int codec_get_wav_tag(int id)
+{
+    return codec_get_tag(codec_wav_tags, id);
+}
+
+enum CodecID codec_get_bmp_id(unsigned int tag)
+{
+    return codec_get_id(codec_bmp_tags, tag);
+}
+
+enum CodecID codec_get_wav_id(unsigned int tag)
+{
+    return codec_get_id(codec_wav_tags, tag);
+}
+
+#ifdef CONFIG_MUXERS
+offset_t start_tag(ByteIOContext *pb, const char *tag)
+{
+    put_tag(pb, tag);
+    put_le32(pb, 0);
+    return url_ftell(pb);
+}
+
+void end_tag(ByteIOContext *pb, offset_t start)
+{
+    offset_t pos;
+
+    pos = url_ftell(pb);
+    url_fseek(pb, start - 4, SEEK_SET);
+    put_le32(pb, (uint32_t)(pos - start));
+    url_fseek(pb, pos, SEEK_SET);
+}
+
+/* WAVEFORMATEX header */
+/* returns the size or -1 on error */
+int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
+{
+    int bps, blkalign, bytespersec;
+    int hdrsize = 18;
+
+    if(!enc->codec_tag || enc->codec_tag > 0xffff)
+       enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
+    if(!enc->codec_tag)
+        return -1;
+
+    put_le16(pb, enc->codec_tag);
+    put_le16(pb, enc->channels);
+    put_le32(pb, enc->sample_rate);
+    if (enc->codec_id == CODEC_ID_PCM_U8 ||
+        enc->codec_id == CODEC_ID_PCM_ALAW ||
+        enc->codec_id == CODEC_ID_PCM_MULAW) {
+        bps = 8;
+    } else if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
+        bps = 0;
+    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV || enc->codec_id == CODEC_ID_ADPCM_MS || enc->codec_id == CODEC_ID_ADPCM_G726 || enc->codec_id == CODEC_ID_ADPCM_YAMAHA) { //
+        bps = 4;
+    } else if (enc->codec_id == CODEC_ID_PCM_S24LE) {
+        bps = 24;
+    } else if (enc->codec_id == CODEC_ID_PCM_S32LE) {
+        bps = 32;
+    } else {
+        bps = 16;
+    }
+
+    if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
+        blkalign = enc->frame_size; //this is wrong, but seems many demuxers dont work if this is set correctly
+        //blkalign = 144 * enc->bit_rate/enc->sample_rate;
+    } else if (enc->codec_id == CODEC_ID_ADPCM_G726) { //
+        blkalign = 1;
+    } else if (enc->block_align != 0) { /* specified by the codec */
+        blkalign = enc->block_align;
+    } else
+        blkalign = enc->channels*bps >> 3;
+    if (enc->codec_id == CODEC_ID_PCM_U8 ||
+        enc->codec_id == CODEC_ID_PCM_S24LE ||
+        enc->codec_id == CODEC_ID_PCM_S32LE ||
+        enc->codec_id == CODEC_ID_PCM_S16LE) {
+        bytespersec = enc->sample_rate * blkalign;
+    } else {
+        bytespersec = enc->bit_rate / 8;
+    }
+    put_le32(pb, bytespersec); /* bytes per second */
+    put_le16(pb, blkalign); /* block align */
+    put_le16(pb, bps); /* bits per sample */
+    if (enc->codec_id == CODEC_ID_MP3) {
+        put_le16(pb, 12); /* wav_extra_size */
+        hdrsize += 12;
+        put_le16(pb, 1); /* wID */
+        put_le32(pb, 2); /* fdwFlags */
+        put_le16(pb, 1152); /* nBlockSize */
+        put_le16(pb, 1); /* nFramesPerBlock */
+        put_le16(pb, 1393); /* nCodecDelay */
+    } else if (enc->codec_id == CODEC_ID_MP2) {
+        put_le16(pb, 22); /* wav_extra_size */
+        hdrsize += 22;
+        put_le16(pb, 2);  /* fwHeadLayer */
+        put_le32(pb, enc->bit_rate); /* dwHeadBitrate */
+        put_le16(pb, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
+        put_le16(pb, 0);  /* fwHeadModeExt */
+        put_le16(pb, 1);  /* wHeadEmphasis */
+        put_le16(pb, 16); /* fwHeadFlags */
+        put_le32(pb, 0);  /* dwPTSLow */
+        put_le32(pb, 0);  /* dwPTSHigh */
+    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
+        put_le16(pb, 2); /* wav_extra_size */
+        hdrsize += 2;
+        put_le16(pb, ((enc->block_align - 4 * enc->channels) / (4 * enc->channels)) * 8 + 1); /* wSamplesPerBlock */
+    } else if(enc->extradata_size){
+        put_le16(pb, enc->extradata_size);
+        put_buffer(pb, enc->extradata, enc->extradata_size);
+        hdrsize += enc->extradata_size;
+        if(hdrsize&1){
+            hdrsize++;
+            put_byte(pb, 0);
+        }
+    } else {
+        hdrsize -= 2;
+    }
+
+    return hdrsize;
+}
+
+/* BITMAPINFOHEADER header */
+void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf)
+{
+    put_le32(pb, 40 + enc->extradata_size); /* size */
+    put_le32(pb, enc->width);
+    put_le32(pb, enc->height);
+    put_le16(pb, 1); /* planes */
+
+    put_le16(pb, enc->bits_per_sample ? enc->bits_per_sample : 24); /* depth */
+    /* compression type */
+    put_le32(pb, for_asf ? (enc->codec_tag ? enc->codec_tag : codec_get_asf_tag(tags, enc->codec_id)) : enc->codec_tag); //
+    put_le32(pb, enc->width * enc->height * 3);
+    put_le32(pb, 0);
+    put_le32(pb, 0);
+    put_le32(pb, 0);
+    put_le32(pb, 0);
+
+    put_buffer(pb, enc->extradata, enc->extradata_size);
+
+    if (enc->extradata_size & 1)
+        put_byte(pb, 0);
+}
+#endif //CONFIG_MUXERS
+
+#ifdef CONFIG_DEMUXERS
+/* We could be given one of the three possible structures here:
+ * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
+ * is an expansion of the previous one with the fields added
+ * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
+ * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
+ * an openended structure.
+ */
+void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size)
+{
+    int id;
+
+    id = get_le16(pb);
+    codec->codec_type = CODEC_TYPE_AUDIO;
+    codec->codec_tag = id;
+    codec->channels = get_le16(pb);
+    codec->sample_rate = get_le32(pb);
+    codec->bit_rate = get_le32(pb) * 8;
+    codec->block_align = get_le16(pb);
+    if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
+        codec->bits_per_sample = 8;
+    }else
+        codec->bits_per_sample = get_le16(pb);
+    codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample);
+
+    if (size > 16) {  /* We're obviously dealing with WAVEFORMATEX */
+        codec->extradata_size = get_le16(pb);
+        if (codec->extradata_size > 0) {
+            if (codec->extradata_size > size - 18)
+                codec->extradata_size = size - 18;
+            codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
+            get_buffer(pb, codec->extradata, codec->extradata_size);
+        } else
+            codec->extradata_size = 0;
+
+        /* It is possible for the chunk to contain garbage at the end */
+        if (size - codec->extradata_size - 18 > 0)
+            url_fskip(pb, size - codec->extradata_size - 18);
+    }
+}
+
+
+int wav_codec_get_id(unsigned int tag, int bps)
+{
+    int id;
+    id = codec_get_id(codec_wav_tags, tag);
+    if (id <= 0)
+        return id;
+    /* handle specific u8 codec */
+    if (id == CODEC_ID_PCM_S16LE && bps == 8)
+        id = CODEC_ID_PCM_U8;
+    if (id == CODEC_ID_PCM_S16LE && bps == 24)
+        id = CODEC_ID_PCM_S24LE;
+    if (id == CODEC_ID_PCM_S16LE && bps == 32)
+        id = CODEC_ID_PCM_S32LE;
+    return id;
+}
+#endif // CONFIG_DEMUXERS
+
+void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
+{
+    int gcd;
+
+    *au_ssize= stream->block_align;
+    if(stream->frame_size && stream->sample_rate){
+        *au_scale=stream->frame_size;
+        *au_rate= stream->sample_rate;
+    }else if(stream->codec_type == CODEC_TYPE_VIDEO){
+        *au_scale= stream->time_base.num;
+        *au_rate = stream->time_base.den;
+    }else{
+        *au_scale= stream->block_align ? stream->block_align*8 : 8;
+        *au_rate = stream->bit_rate;
+    }
+    gcd= ff_gcd(*au_scale, *au_rate);
+    *au_scale /= gcd;
+    *au_rate /= gcd;
+}
diff --git a/libavformat/riff.h b/libavformat/riff.h
new file mode 100644
index 0000000000..91c050196f
--- /dev/null
+++ b/libavformat/riff.h
@@ -0,0 +1,30 @@
+#ifndef FF_RIFF_H
+#define FF_RIFF_H
+
+offset_t start_tag(ByteIOContext *pb, const char *tag);
+void end_tag(ByteIOContext *pb, offset_t start);
+
+typedef struct CodecTag {
+    int id;
+    unsigned int tag;
+    unsigned int invalid_asf : 1;
+} CodecTag;
+
+void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf);
+int put_wav_header(ByteIOContext *pb, AVCodecContext *enc);
+int wav_codec_get_id(unsigned int tag, int bps);
+void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size);
+
+extern const CodecTag codec_bmp_tags[];
+extern const CodecTag codec_wav_tags[];
+
+unsigned int codec_get_tag(const CodecTag *tags, int id);
+enum CodecID codec_get_id(const CodecTag *tags, unsigned int tag);
+unsigned int codec_get_bmp_tag(int id);
+unsigned int codec_get_wav_tag(int id);
+enum CodecID codec_get_bmp_id(unsigned int tag);
+enum CodecID codec_get_wav_id(unsigned int tag);
+unsigned int codec_get_asf_tag(const CodecTag *tags, unsigned int id);
+void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale);
+
+#endif
diff --git a/libavformat/smacker.c b/libavformat/smacker.c
index f672639928..207c827bf9 100644
--- a/libavformat/smacker.c
+++ b/libavformat/smacker.c
@@ -22,7 +22,7 @@
  */
 
 #include "avformat.h"
-#include "avi.h"
+#include "riff.h"
 #include "bswap.h"
 
 #define SMACKER_PAL 0x01
diff --git a/libavformat/sol.c b/libavformat/sol.c
index 4dc876e8b7..bf50fe9481 100644
--- a/libavformat/sol.c
+++ b/libavformat/sol.c
@@ -23,7 +23,7 @@
 
 #include "avformat.h"
 #include "allformats.h"
-#include "avi.h"
+#include "riff.h"
 #include "bswap.h"
 
 /* if we don't know the size in advance */
diff --git a/libavformat/voc.c b/libavformat/voc.c
index 38256d3b91..55e271ac9a 100644
--- a/libavformat/voc.c
+++ b/libavformat/voc.c
@@ -18,7 +18,7 @@
  */
 
 #include "avformat.h"
-#include "avi.h"    /* for CodecTag */
+#include "riff.h"    /* for CodecTag */
 #include "voc.h"
 
 
diff --git a/libavformat/wav.c b/libavformat/wav.c
index 4d926a41d2..cc28ec5e31 100644
--- a/libavformat/wav.c
+++ b/libavformat/wav.c
@@ -18,188 +18,7 @@
  */
 #include "avformat.h"
 #include "allformats.h"
-#include "avi.h"
-
-const CodecTag codec_wav_tags[] = {
-    { CODEC_ID_MP2, 0x50 },
-    { CODEC_ID_MP3, 0x55 },
-    { CODEC_ID_AC3, 0x2000 },
-    { CODEC_ID_DTS, 0x2001 },
-    { CODEC_ID_PCM_S16LE, 0x01 },
-    { CODEC_ID_PCM_U8, 0x01 }, /* must come after s16le in this list */
-    { CODEC_ID_PCM_S24LE, 0x01 },
-    { CODEC_ID_PCM_S32LE, 0x01 },
-    { CODEC_ID_PCM_ALAW, 0x06 },
-    { CODEC_ID_PCM_MULAW, 0x07 },
-    { CODEC_ID_ADPCM_MS, 0x02 },
-    { CODEC_ID_ADPCM_IMA_WAV, 0x11 },
-    { CODEC_ID_ADPCM_YAMAHA, 0x20 },
-    { CODEC_ID_ADPCM_G726, 0x45 },
-    { CODEC_ID_ADPCM_IMA_DK4, 0x61 },  /* rogue format number */
-    { CODEC_ID_ADPCM_IMA_DK3, 0x62 },  /* rogue format number */
-    { CODEC_ID_WMAV1, 0x160 },
-    { CODEC_ID_WMAV2, 0x161 },
-    { CODEC_ID_AAC, 0x706d },
-    { CODEC_ID_VORBIS, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
-    { CODEC_ID_SONIC, 0x2048 },
-    { CODEC_ID_SONIC_LS, 0x2048 },
-    { CODEC_ID_ADPCM_CT, 0x200 },
-    { CODEC_ID_ADPCM_SWF, ('S'<<8)+'F' },
-    { CODEC_ID_TRUESPEECH, 0x22 },
-
-    // for NuppelVideo (nuv.c)
-    { CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
-    { CODEC_ID_MP3, MKTAG('L', 'A', 'M', 'E') },
-    { 0, 0 },
-};
-
-#ifdef CONFIG_MUXERS
-/* WAVEFORMATEX header */
-/* returns the size or -1 on error */
-int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
-{
-    int bps, blkalign, bytespersec;
-    int hdrsize = 18;
-
-    if(!enc->codec_tag || enc->codec_tag > 0xffff)
-       enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
-    if(!enc->codec_tag)
-        return -1;
-
-    put_le16(pb, enc->codec_tag);
-    put_le16(pb, enc->channels);
-    put_le32(pb, enc->sample_rate);
-    if (enc->codec_id == CODEC_ID_PCM_U8 ||
-        enc->codec_id == CODEC_ID_PCM_ALAW ||
-        enc->codec_id == CODEC_ID_PCM_MULAW) {
-        bps = 8;
-    } else if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
-        bps = 0;
-    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV || enc->codec_id == CODEC_ID_ADPCM_MS || enc->codec_id == CODEC_ID_ADPCM_G726 || enc->codec_id == CODEC_ID_ADPCM_YAMAHA) { //
-        bps = 4;
-    } else if (enc->codec_id == CODEC_ID_PCM_S24LE) {
-        bps = 24;
-    } else if (enc->codec_id == CODEC_ID_PCM_S32LE) {
-        bps = 32;
-    } else {
-        bps = 16;
-    }
-
-    if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
-        blkalign = enc->frame_size; //this is wrong, but seems many demuxers dont work if this is set correctly
-        //blkalign = 144 * enc->bit_rate/enc->sample_rate;
-    } else if (enc->codec_id == CODEC_ID_ADPCM_G726) { //
-        blkalign = 1;
-    } else if (enc->block_align != 0) { /* specified by the codec */
-        blkalign = enc->block_align;
-    } else
-        blkalign = enc->channels*bps >> 3;
-    if (enc->codec_id == CODEC_ID_PCM_U8 ||
-        enc->codec_id == CODEC_ID_PCM_S24LE ||
-        enc->codec_id == CODEC_ID_PCM_S32LE ||
-        enc->codec_id == CODEC_ID_PCM_S16LE) {
-        bytespersec = enc->sample_rate * blkalign;
-    } else {
-        bytespersec = enc->bit_rate / 8;
-    }
-    put_le32(pb, bytespersec); /* bytes per second */
-    put_le16(pb, blkalign); /* block align */
-    put_le16(pb, bps); /* bits per sample */
-    if (enc->codec_id == CODEC_ID_MP3) {
-        put_le16(pb, 12); /* wav_extra_size */
-        hdrsize += 12;
-        put_le16(pb, 1); /* wID */
-        put_le32(pb, 2); /* fdwFlags */
-        put_le16(pb, 1152); /* nBlockSize */
-        put_le16(pb, 1); /* nFramesPerBlock */
-        put_le16(pb, 1393); /* nCodecDelay */
-    } else if (enc->codec_id == CODEC_ID_MP2) {
-        put_le16(pb, 22); /* wav_extra_size */
-        hdrsize += 22;
-        put_le16(pb, 2);  /* fwHeadLayer */
-        put_le32(pb, enc->bit_rate); /* dwHeadBitrate */
-        put_le16(pb, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
-        put_le16(pb, 0);  /* fwHeadModeExt */
-        put_le16(pb, 1);  /* wHeadEmphasis */
-        put_le16(pb, 16); /* fwHeadFlags */
-        put_le32(pb, 0);  /* dwPTSLow */
-        put_le32(pb, 0);  /* dwPTSHigh */
-    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
-        put_le16(pb, 2); /* wav_extra_size */
-        hdrsize += 2;
-        put_le16(pb, ((enc->block_align - 4 * enc->channels) / (4 * enc->channels)) * 8 + 1); /* wSamplesPerBlock */
-    } else if(enc->extradata_size){
-        put_le16(pb, enc->extradata_size);
-        put_buffer(pb, enc->extradata, enc->extradata_size);
-        hdrsize += enc->extradata_size;
-        if(hdrsize&1){
-            hdrsize++;
-            put_byte(pb, 0);
-        }
-    } else {
-        hdrsize -= 2;
-    }
-
-    return hdrsize;
-}
-#endif //CONFIG_MUXERS
-
-/* We could be given one of the three possible structures here:
- * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
- * is an expansion of the previous one with the fields added
- * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
- * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
- * an openended structure.
- */
-void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size)
-{
-    int id;
-
-    id = get_le16(pb);
-    codec->codec_type = CODEC_TYPE_AUDIO;
-    codec->codec_tag = id;
-    codec->channels = get_le16(pb);
-    codec->sample_rate = get_le32(pb);
-    codec->bit_rate = get_le32(pb) * 8;
-    codec->block_align = get_le16(pb);
-    if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
-        codec->bits_per_sample = 8;
-    }else
-        codec->bits_per_sample = get_le16(pb);
-    codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample);
-
-    if (size > 16) {  /* We're obviously dealing with WAVEFORMATEX */
-        codec->extradata_size = get_le16(pb);
-        if (codec->extradata_size > 0) {
-            if (codec->extradata_size > size - 18)
-                codec->extradata_size = size - 18;
-            codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
-            get_buffer(pb, codec->extradata, codec->extradata_size);
-        } else
-            codec->extradata_size = 0;
-
-        /* It is possible for the chunk to contain garbage at the end */
-        if (size - codec->extradata_size - 18 > 0)
-            url_fskip(pb, size - codec->extradata_size - 18);
-    }
-}
-
-
-int wav_codec_get_id(unsigned int tag, int bps)
-{
-    int id;
-    id = codec_get_id(codec_wav_tags, tag);
-    if (id <= 0)
-        return id;
-    /* handle specific u8 codec */
-    if (id == CODEC_ID_PCM_S16LE && bps == 8)
-        id = CODEC_ID_PCM_U8;
-    if (id == CODEC_ID_PCM_S16LE && bps == 24)
-        id = CODEC_ID_PCM_S24LE;
-    if (id == CODEC_ID_PCM_S16LE && bps == 32)
-        id = CODEC_ID_PCM_S32LE;
-    return id;
-}
+#include "riff.h"
 
 typedef struct {
     offset_t data;