summaryrefslogtreecommitdiff
path: root/tools/rbspeex/rbspeexdec.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/rbspeex/rbspeexdec.c')
-rw-r--r--tools/rbspeex/rbspeexdec.c118
1 files changed, 118 insertions, 0 deletions
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 @@
1 /**************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 *
9 * Copyright (C) 2007 Thom Johansen
10 *
11 * All files in this archive are subject to the GNU General Public License.
12 * See the file COPYING in the source tree root for full license agreement.
13 *
14 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
15 * KIND, either express or implied.
16 *
17 ***************************************************************************/
18
19#include <speex/speex.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include "string.h"
23
24 #define USAGE_TEXT \
25"Usage: rbspeexdec infile outfile\n"\
26"rbspeexdec outputs mono 16 bit 16 kHz WAV files.\n"\
27"WARNING: This tool will only decode files made with rbspeexenc!\n"
28
29void put_ushort_le(unsigned short x, unsigned char *out)
30{
31 out[0] = x & 0xff;
32 out[1] = x >> 8;
33}
34
35void put_uint_le(unsigned int x, unsigned char *out)
36{
37 out[0] = x & 0xff;
38 out[1] = (x >> 8) & 0xff;
39 out[2] = (x >> 16) & 0xff;
40 out[3] = x >> 24;
41}
42
43int main(int argc, char **argv)
44{
45 FILE *fin, *fout;
46 char *indata;
47 short out[640]; /* max frame size (UWB) */
48 unsigned char wavhdr[44];
49 int numbytes;
50 void *st; /* decoder state */
51 SpeexBits bits;
52 int i, tmp, lookahead, frame_size;
53 unsigned int samples = 0;
54 long insize;
55
56 if (argc < 3) {
57 printf(USAGE_TEXT);
58 return 1;
59 }
60
61 /* Rockbox speex streams are always assumed to be WB */
62 st = speex_decoder_init(&speex_wb_mode);
63
64 /* Set the perceptual enhancement on (is default, but doesn't hurt) */
65 tmp = 1;
66 speex_decoder_ctl(st, SPEEX_SET_ENH, &tmp);
67 speex_decoder_ctl(st, SPEEX_GET_LOOKAHEAD, &lookahead);
68 speex_decoder_ctl(st, SPEEX_GET_FRAME_SIZE, &frame_size);
69
70 if ((fin = fopen(argv[1], "rb")) == NULL) {
71 printf("Error: could not open input file\n");
72 return 1;
73 }
74 if ((fout = fopen(argv[2], "wb")) == NULL) {
75 printf("Error: could not open output file\n");
76 return 1;
77 }
78 /* slurp infile */
79 fseek(fin, 0, SEEK_END);
80 insize = ftell(fin);
81 fseek(fin, 0, SEEK_SET);
82 indata = malloc(insize);
83 fread(indata, 1, insize, fin);
84 fclose(fin);
85
86 /* fill in wav header */
87 strcpy(wavhdr, "RIFF");
88 strcpy(wavhdr + 8, "WAVEfmt ");
89 put_uint_le(16, wavhdr + 16);
90 put_ushort_le(1, wavhdr + 20); /* PCM data */
91 put_ushort_le(1, wavhdr + 22); /* mono */
92 put_uint_le(16000, wavhdr + 24); /* 16000 Hz */
93 put_uint_le(16000*2, wavhdr + 28); /* chan*sr*bbs/8 */
94 put_ushort_le(2, wavhdr + 32); /* chan*bps/8 */
95 put_ushort_le(16, wavhdr + 34); /* bits per sample */
96 strcpy(wavhdr + 36, "data");
97 fwrite(wavhdr, 1, 44, fout); /* write header */
98 /* make bit buffer use our own buffer */
99 speex_bits_set_bit_buffer(&bits, indata, insize);
100 while (speex_decode_int(st, &bits, out) == 0) {
101 /* if no error, write decoded audio */
102 fwrite(out + lookahead, sizeof(short), frame_size - lookahead, fout);
103 samples += frame_size - lookahead;
104 lookahead = 0; /* only skip samples at the start */
105 }
106 speex_decoder_destroy(st);
107 /* now fill in the values in the wav header we didn't have at the start */
108 fseek(fout, 4, SEEK_SET);
109 put_uint_le(36 + samples*2, wavhdr); /* header size + data size */
110 fwrite(wavhdr, 1, 4, fout);
111 fseek(fout, 40, SEEK_SET);
112 put_uint_le(samples*2, wavhdr); /* data size */
113 fwrite(wavhdr, 1, 4, fout);
114 fclose(fout);
115 free(indata);
116 return 0;
117}
118