Add rbspeexdec, decoder for the Rockbox voice clips. Also nitpick a bit on rbspeexenc while I'm at it.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15842 a1c6a512-1295-4272-9138-f99709370657

3 files changed, 133 insertions, 4 deletions

diff --git a/tools/rbspeex/Makefile b/tools/rbspeex/Makefile
index 2e8a692c3d..f6e70def96 100644
--- a/tools/rbspeex/Makefile
+++ b/tools/rbspeex/Makefile
@@ -26,14 +26,14 @@ endif
 # This sets up 'SRC' based on the files mentioned in SOURCES
 SRC := $(shell cat $(SPEEXSRC)/SOURCES | $(CC) $(CFLAGS) -E -P - | grep -v "^\#")
 
-SOURCES = $(SRC:%.c=$(SPEEXSRC)/%.c) rbspeexenc.c
+SOURCES = $(SRC:%.c=$(SPEEXSRC)/%.c) rbspeexenc.c rbspeexdec.c
 OBJS := $(SRC:%.c=%.o)
 DEPFILE = dep-speex
 DIRS = 
 
 .PHONY : all
 
-all: ../rbspeexenc
+all: ../rbspeexenc ../rbspeexdec
 
 $(DEPFILE): $(SOURCES)
         $(SILENT)rm -f $(DEPFILE)
@@ -57,6 +57,10 @@ libspeex.a: $(OBJS) $(DEPFILE)
         @echo Linking ../rbspeexenc
         $(SILENT)$(CC) $(CFLAGS) -o ../rbspeexenc rbspeexenc.o libspeex.a -lm
 
+../rbspeexdec: $(OBJS) libspeex.a rbspeexdec.o
+        @echo Linking ../rbspeexdec
+        $(SILENT)$(CC) $(CFLAGS) -o ../rbspeexdec rbspeexdec.o libspeex.a -lm
+
 %.o:
         @echo CC $<
         $(SILENT)$(CC) $(CFLAGS) -c $< -o $@
diff --git a/tools/rbspeex/rbspeexdec.c b/tools/rbspeex/rbspeexdec.c
new file mode 100644
index 0000000000..90562f7309
--- /dev/null
+++ b/tools/rbspeex/rbspeexdec.c
@@ -0,0 +1,118 @@
+ /**************************************************************************
+  *             __________               __   ___.
+  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+  *                     \/            \/     \/    \/            \/
+  *
+  * Copyright (C) 2007 Thom Johansen
+  *
+  * All files in this archive are subject to the GNU General Public License.
+  * See the file COPYING in the source tree root for full license agreement.
+  *
+  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+  * KIND, either express or implied.
+  *
+  ***************************************************************************/
+ 
+#include <speex/speex.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "string.h"
+  
+ #define USAGE_TEXT \
+"Usage: rbspeexdec infile outfile\n"\
+"rbspeexdec outputs mono 16 bit 16 kHz WAV files.\n"\
+"WARNING: This tool will only decode files made with rbspeexenc!\n"
+
+void put_ushort_le(unsigned short x, unsigned char *out)
+{
+    out[0] = x & 0xff;
+    out[1] = x >> 8;
+}
+
+void put_uint_le(unsigned int x, unsigned char *out)
+{
+    out[0] = x & 0xff;
+    out[1] = (x >> 8) & 0xff;
+    out[2] = (x >> 16) & 0xff;
+    out[3] = x >> 24;
+}
+
+int main(int argc, char **argv)
+{
+    FILE *fin, *fout;
+    char *indata;
+    short out[640]; /* max frame size (UWB) */
+    unsigned char wavhdr[44];
+    int numbytes;
+    void *st; /* decoder state */
+    SpeexBits bits;
+    int i, tmp, lookahead, frame_size;
+    unsigned int samples = 0;
+    long insize;
+
+    if (argc < 3) {
+        printf(USAGE_TEXT);
+        return 1;
+    }
+
+    /* Rockbox speex streams are always assumed to be WB */
+    st = speex_decoder_init(&speex_wb_mode);
+ 
+    /* Set the perceptual enhancement on (is default, but doesn't hurt) */
+    tmp = 1;
+    speex_decoder_ctl(st, SPEEX_SET_ENH, &tmp);
+    speex_decoder_ctl(st, SPEEX_GET_LOOKAHEAD, &lookahead);
+    speex_decoder_ctl(st, SPEEX_GET_FRAME_SIZE, &frame_size);
+ 
+    if ((fin = fopen(argv[1], "rb")) == NULL) {
+        printf("Error: could not open input file\n");
+        return 1;
+    }
+    if ((fout = fopen(argv[2], "wb")) == NULL) {
+        printf("Error: could not open output file\n");
+        return 1;
+    }
+    /* slurp infile */
+    fseek(fin, 0, SEEK_END);
+    insize = ftell(fin);
+    fseek(fin, 0, SEEK_SET);
+    indata = malloc(insize);
+    fread(indata, 1, insize, fin);
+    fclose(fin);
+
+    /* fill in wav header */
+    strcpy(wavhdr, "RIFF");
+    strcpy(wavhdr + 8, "WAVEfmt ");
+    put_uint_le(16, wavhdr + 16);
+    put_ushort_le(1, wavhdr + 20);      /* PCM data */
+    put_ushort_le(1, wavhdr + 22);      /* mono */
+    put_uint_le(16000, wavhdr + 24);    /* 16000 Hz */
+    put_uint_le(16000*2, wavhdr + 28);  /* chan*sr*bbs/8 */
+    put_ushort_le(2, wavhdr + 32);      /* chan*bps/8 */
+    put_ushort_le(16, wavhdr + 34);     /* bits per sample */
+    strcpy(wavhdr + 36, "data");
+    fwrite(wavhdr, 1, 44, fout);        /* write header */
+    /* make bit buffer use our own buffer */
+    speex_bits_set_bit_buffer(&bits, indata, insize);
+    while (speex_decode_int(st, &bits, out) == 0) {
+        /* if no error, write decoded audio */
+        fwrite(out + lookahead, sizeof(short), frame_size - lookahead, fout);
+        samples += frame_size - lookahead;
+        lookahead = 0; /* only skip samples at the start */
+    }
+    speex_decoder_destroy(st);
+    /* now fill in the values in the wav header we didn't have at the start */
+    fseek(fout, 4, SEEK_SET);
+    put_uint_le(36 + samples*2, wavhdr); /* header size + data size */
+    fwrite(wavhdr, 1, 4, fout);
+    fseek(fout, 40, SEEK_SET);
+    put_uint_le(samples*2, wavhdr);      /* data size */
+    fwrite(wavhdr, 1, 4, fout);
+    fclose(fout);
+    free(indata);
+    return 0;
+}
+
diff --git a/tools/rbspeex/rbspeexenc.c b/tools/rbspeex/rbspeexenc.c
index 7869602f44..d3c3f7712c 100644
--- a/tools/rbspeex/rbspeexenc.c
+++ b/tools/rbspeex/rbspeexenc.c
@@ -30,7 +30,7 @@
 "  -c x   Complexity, increases quality for a given bitrate, but encodes\n"\
 "         slower, range [0-10], default 3\n"\
 "  -n     Enable narrowband mode, will resample input to 8 kHz\n\n"\
-"  -v x   Volume, amplitude multiplier, default 1.0.\n"\
+"  -v x   Volume, amplitude multiplier, default 1.0\n"\
 "rbspeexenc expects a mono 16 bit WAV file as input. Files will be resampled\n"\
 "to either 16 kHz by default, or 8 kHz if narrowband mode is enabled.\n"\
 "WARNING: This tool will create files that are only usable by Rockbox!\n"
@@ -146,6 +146,10 @@ int main(int argc, char **argv)
             volume = atof(argv[++i]);
         else if (strncmp(argv[i], "-n", 2) == 0)
             narrowband = true;
+        else {
+            printf("Error: unrecognized option '%s'\n", argv[i]);
+            return 1;
+        }
         ++i;
     }
 
@@ -210,7 +214,10 @@ int main(int argc, char **argv)
    
     speex_bits_init(&bits);
     inpos = in;
-    fout = fopen(argv[argc - 1], "wb");
+    if ((fout = fopen(argv[argc - 1], "wb")) == NULL) {
+        printf("Error: could not open output file\n");
+        return 1;
+    }
 
     while (numsamples > 0) {
         int samples = frame_size;