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/* Standard includes */
#include "stdlib.h"
#include "string.h"
#include "stdio.h"
/* snd includes */
#include "snd.h"
/* set the length of buffers to be even multiple of Audio_...
* to avoid fractional filling of
* audio output buffers
*/
#define MAXLEN MAX_FILE_BUF_LEN
char *header_string[] = { "none", "AIFF", "IRCAM", "NeXT", "Wave" };
char *header_to_string(long header)
{
if (header < 0 || header > 4) return "InvalidData";
else return header_string[header];
}
void snd_print_info(snd_type snd)
{
if (snd->device == SND_DEVICE_AUDIO) {
if (snd->write_flag == SND_READ) {
printf("audio input");
} else {
printf("audio output");
}
} else if (snd->device == SND_DEVICE_MEM) {
if (snd->write_flag == SND_READ) {
printf("from memory buffer");
} else {
printf("to memory buffer");
}
} else {
printf("header %s", header_to_string(snd->u.file.header));
}
printf(", channels %d, mode %s, bits %d, srate %g",
snd->format.channels,
snd_mode_to_string(snd->format.mode),
snd->format.bits, snd->format.srate);
if (snd->device == SND_DEVICE_MEM) {
if (snd->write_flag == SND_READ) {
printf("length %d\n", snd->u.mem.buffer_len);
} else {
printf("length %d\n", snd->u.mem.buffer_max);
}
} else if (snd->device == SND_DEVICE_FILE &&
snd->write_flag == SND_READ) {
printf(", length %d\n", (snd->u.file.end_offset -
snd->u.file.byte_offset) / snd_bytes_per_frame(snd));
} else printf("\n");
}
int main(int argc, char *argv[])
{
char *fromfile = NULL;
char *tofile = NULL;
int i;
long flags = 0;
long frames;
long len;
long checksum = 0;
long count = 0;
int format = SND_HEAD_AIFF;
int mode = SND_MODE_PCM;
int channels = 1;
int bits = 16;
double srate = 44100.0;
snd_node from_snd, to_snd;
char from_buf[MAXLEN];
char to_buf[MAXLEN];
long frames_from_len;
long frames_to_len;
long from_len = 0;
long to_len = 0;
for (i = 1; i < argc; i++) {
if (*(argv[i]) != '-') {
if (!fromfile) fromfile = argv[i];
else if (!tofile) tofile = argv[i];
else {
printf("%s: don't know what to do with 3rd file\n", argv[i]);
return 1;
}
} else {
char *flag = argv[i] + 1;
if (*flag == '?') {
printf("convert -- sound file conversion utility\n\n");
printf("usage: convert fromfile tofile -flag1 -flag2 ...\n");
printf(" -fa -- AIFF file format\n");
printf(" -fi -- IRCAM file format\n");
printf(" -fn -- NeXT/Sun file format\n");
printf(" -fw -- Wave file format\n");
printf(" -ep -- PCM\n");
printf(" -em -- u-Law\n");
printf(" -ef -- float\n");
printf(" -eu -- unsigned PCM\n");
printf(" -b1 -- 8-bit\n");
printf(" -b2 -- 16-bit\n");
printf(" -b4 -- 32-bit\n");
printf(" -c1 -- 1 channel, etc.\n");
printf("use 'ada' to get audio input or output\n");
} else if (*flag == 'f') {
switch (flag[1]) {
case 'a': format = SND_HEAD_AIFF; break;
case 'i': format = SND_HEAD_IRCAM; break;
case 'n': format = SND_HEAD_NEXT; break;
case 'w': format = SND_HEAD_WAVE; break;
default: printf("flag %s ignored\n", argv[i]); break;
}
} else if (*flag == 'e') {
switch (flag[1]) {
case 'p': mode = SND_MODE_PCM; break;
case 'm': mode = SND_MODE_ULAW; break;
case 'f': mode = SND_MODE_FLOAT; break;
case 'u': mode = SND_MODE_UPCM; break;
default: printf("flag %s ignored\n", argv[i]); break;
}
} else if (*flag == 'b') {
switch (flag[1]) {
case '1': bits = 8; break;
case '2': bits = 16; break;
case '4': bits = 32; break;
default: printf("flag %s ignored\n", argv[i]); break;
}
} else if (*flag == 'r') {
switch (flag[1]) {
case '4': srate = 44100.0; break;
case '2': srate = 22050.0; break;
case '1': srate = 11025.0; break;
case '8': srate = 8000.0; break;
default: printf("flag %s ignored\n", argv[i]); break;
}
} else if (*flag == 'c') {
channels = atoi(flag+1);
if (channels < 1 || channels > 16) {
channels = 1;
printf("flag %s ignored, using 1 channel\n",
argv[i]);
}
}
}
}
if (!tofile) {
printf("2 files not found, use -? for help\n");
return 1;
}
from_snd.device = SND_DEVICE_FILE;
from_snd.write_flag = SND_READ;
from_snd.u.file.byte_offset = 0;
from_snd.format.channels = channels;
from_snd.format.mode = mode;
from_snd.format.bits = bits;
from_snd.format.srate = srate;
if (strcmp(fromfile, "ada") == 0) {
from_snd.device = SND_DEVICE_AUDIO;
from_snd.u.audio.protocol = SND_COMPUTEAHEAD;
from_snd.u.audio.latency = 1.0;
from_snd.u.audio.granularity = 0.1;
strcpy(from_snd.u.file.filename, "");
} else {
strcpy(from_snd.u.file.filename, fromfile);
}
if (snd_open(&from_snd, &flags) != SND_SUCCESS) {
printf("error opening %s for input\n", fromfile);
exit(1);
}
printf("Opened %s for input: ", from_snd.u.file.filename);
snd_print_info(&from_snd);
to_snd.device = SND_DEVICE_FILE;
to_snd.write_flag = SND_WRITE;
to_snd.format.channels = channels;
to_snd.format.mode = mode;
to_snd.format.bits = bits;
to_snd.format.srate = from_snd.format.srate;
to_snd.u.file.header = format; /* header format, e.g. AIFF */
if (to_snd.u.file.header == SND_HEAD_WAVE && to_snd.format.mode == SND_MODE_PCM &&
to_snd.format.bits == 8) to_snd.format.mode = SND_MODE_UPCM;
if (strcmp(tofile, "ada") == 0) {
to_snd.device = SND_DEVICE_AUDIO;
to_snd.u.audio.protocol = SND_COMPUTEAHEAD;
to_snd.u.audio.latency = 0.0;
to_snd.u.audio.granularity = 0.1;
strcpy(to_snd.u.audio.interfacename, "");
strcpy(to_snd.u.audio.devicename, "");
} else {
strcpy(to_snd.u.file.filename, tofile);
}
if (snd_open(&to_snd, &flags) != SND_SUCCESS) {
printf("error opening %s for output\n", tofile);
exit(1);
}
printf("Opened %s for output: ", to_snd.u.file.filename);
snd_print_info(&to_snd);
/* figure out how much to convert on each iteration */
/* first, compute how many frames could fit in each buffer */
from_len = MAXLEN / snd_bytes_per_frame(&from_snd);
to_len = MAXLEN / snd_bytes_per_frame(&to_snd);
/* then compute the minimum of the two frame counts */
frames = min(from_len, to_len);
while (1) {
/* then convert back from frame counts to byte counts: */
while ((frames_from_len = snd_poll(&from_snd)) <=0);
frames_from_len = min(frames_from_len, frames);
while ((frames_to_len = snd_poll(&to_snd)) <= 0);
frames_to_len = min(frames_to_len, frames);
len = min(frames_to_len, frames_from_len);
len = snd_read(&from_snd, from_buf, len);
if (((from_snd.device == SND_DEVICE_AUDIO) &&
(count > from_snd.format.srate * 10)) || (!len)) {
break;
}
for (i = 0; i < len * snd_bytes_per_frame(&from_snd); i++) {
checksum += from_buf[i];
count++;
}
len = snd_convert(&to_snd, to_buf, &from_snd, from_buf, len);
len = snd_write(&to_snd, to_buf, len);
printf("#");
fflush(stdout);
}
snd_close(&from_snd);
if (to_snd.device == SND_DEVICE_AUDIO) {
while (snd_flush(&to_snd) != SND_SUCCESS) ;
}
snd_close(&to_snd);
printf("Read %ld frames, checksum = %ld\n", count, checksum);
exit(0);
}
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