RealAudio 14.4k encoder.

Patch by Francesco Lavra (firstnamelastname@interfree.it)

Originally committed as revision 23579 to svn://svn.ffmpeg.org/ffmpeg/trunk

Changelog

@@ -89,6 +89,7 @@ version 0.6:
 - 35% faster VP3/Theora decoding
 - faster AAC decoding
 - faster H.264 decoding
+- RealAudio 1.0 (14.4K) encoder
 
 
 

configure

@@ -1270,6 +1270,7 @@ png_decoder_select="zlib"
 png_encoder_select="zlib"
 qcelp_decoder_select="lsp"
 qdm2_decoder_select="mdct rdft"
+real_144_encoder_select="lpc"
 rv10_decoder_select="h263_decoder"
 rv10_encoder_select="h263_encoder"
 rv20_decoder_select="h263_decoder"

doc/general.texi

@@ -635,7 +635,7 @@ following image formats are supported:
 @item QCELP / PureVoice      @tab     @tab  X
 @item QDesign Music Codec 2  @tab     @tab  X
     @tab There are still some distortions.
-@item RealAudio 1.0 (14.4K)  @tab     @tab  X
+@item RealAudio 1.0 (14.4K)  @tab  X  @tab  X
     @tab Real 14400 bit/s codec
 @item RealAudio 2.0 (28.8K)  @tab     @tab  X
     @tab Real 28800 bit/s codec

libavcodec/Makefile

@@ -282,6 +282,7 @@ OBJS-$(CONFIG_QTRLE_DECODER)           += qtrle.o
 OBJS-$(CONFIG_QTRLE_ENCODER)           += qtrleenc.o
 OBJS-$(CONFIG_R210_DECODER)            += r210dec.o
 OBJS-$(CONFIG_RA_144_DECODER)          += ra144dec.o ra144.o celp_filters.o
+OBJS-$(CONFIG_RA_144_ENCODER)          += ra144enc.o ra144.o celp_filters.o
 OBJS-$(CONFIG_RA_288_DECODER)          += ra288.o celp_math.o celp_filters.o
 OBJS-$(CONFIG_RAWVIDEO_DECODER)        += rawdec.o
 OBJS-$(CONFIG_RAWVIDEO_ENCODER)        += rawenc.o

libavcodec/allcodecs.c

@@ -247,7 +247,7 @@ void avcodec_register_all(void)
     REGISTER_ENCDEC  (NELLYMOSER, nellymoser);
     REGISTER_DECODER (QCELP, qcelp);
     REGISTER_DECODER (QDM2, qdm2);
-    REGISTER_DECODER (RA_144, ra_144);
+    REGISTER_ENCDEC  (RA_144, ra_144);
     REGISTER_DECODER (RA_288, ra_288);
     REGISTER_DECODER (SHORTEN, shorten);
     REGISTER_DECODER (SIPR, sipr);

libavcodec/avcodec.h

@@ -30,8 +30,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 52
-#define LIBAVCODEC_VERSION_MINOR 75
-#define LIBAVCODEC_VERSION_MICRO  1
+#define LIBAVCODEC_VERSION_MINOR 76
+#define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \

libavcodec/ra144.h

@@ -23,13 +23,18 @@
 #define AVCODEC_RA144_H
 
 #include <stdint.h>
+#include "dsputil.h"
 
 #define NBLOCKS         4       ///< number of subblocks within a block
 #define BLOCKSIZE       40      ///< subblock size in 16-bit words
 #define BUFFERSIZE      146     ///< the size of the adaptive codebook
+#define FIXED_CB_SIZE   128     ///< size of fixed codebooks
+#define FRAMESIZE       20      ///< size of encoded frame
+#define LPC_ORDER       10      ///< order of LPC filter
 
 typedef struct {
     AVCodecContext *avctx;
+    DSPContext dsp;
 
     unsigned int     old_energy;        ///< previous frame energy
 
@@ -41,6 +46,8 @@ typedef struct {
 
     unsigned int     lpc_refl_rms[2];
 
+    int16_t curr_block[NBLOCKS * BLOCKSIZE];
+
     /** The current subblock padded by the last 10 values of the previous one. */
     int16_t curr_sblock[50];