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add support for guessing input file type by looking at the first 4 bytes

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Josh Coalson
2001-05-01 19:17:12 +00:00
parent 8e92f2148d
commit af96ccfb71
1 changed files with 36 additions and 3 deletions
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39
src/flac/main.c
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@@ -34,7 +34,7 @@ int main(int argc, char *argv[])
int i;
bool verify = false, verbose = true, lax = false, mode_decode = false, test_only = false, analyze = false;
bool do_mid_side = true, loose_mid_side = false, do_exhaustive_model_search = false, do_qlp_coeff_prec_search = false;
analysis_options aopts;
analysis_options aopts = { false, false };
unsigned padding = 0;
unsigned max_lpc_order = 8;
unsigned qlp_coeff_precision = 0;
@@ -42,11 +42,15 @@ int main(int argc, char *argv[])
int format_is_wave = -1, format_is_big_endian = -1, format_is_unsigned_samples = false;
int format_channels = -1, format_bps = -1, format_sample_rate = -1;
int blocksize = -1, min_residual_partition_order = -1, max_residual_partition_order = -1, rice_parameter_search_dist = -1;
char default_outfilename[4096]; /* @@@ bad MAGIC NUMBER*/
char requested_seek_points[50000]; /* @@@ bad MAGIC NUMBER */
int num_requested_seek_points = -1; /* -1 => no -S options were given, 0 => -S- was given */
FILE *encode_infile = 0;
/*@@@
aopts.do_residual_text = false;
aopts.do_residual_gnuplot = false;
*/
if(argc <= 1)
return usage(0);
@@ -233,11 +237,40 @@ int main(int argc, char *argv[])
/* tweak options based on the filenames; validate the values */
if(!mode_decode) {
if(0 == strcmp(argv[i], "-")) {
encode_infile = stdin;
}
else {
if(0 == (encode_infile = fopen(argv[i], "rb"))) {
fprintf(stderr, "ERROR: can't open input file %s\n", argv[i]);
return 1;
}
}
if(format_is_wave < 0) {
/* lamely attempt to guess the file type based on the first 4 bytes (which is all ungetc will guarantee us) */
char head[4];
int h, n;
/* first set format based on name */
if(strstr(argv[i], ".wav") == argv[i] + (strlen(argv[i]) - strlen(".wav")))
format_is_wave = true;
else
format_is_wave = false;
if((n = fread(head, 1, 4, encode_infile)) < 4) {
if(format_is_wave)
fprintf(stderr, "WARNING: %s is not a WAVE file, treating as a raw file\n", argv[i]);
format_is_wave = false;
}
else {
if(strncmp(head, "RIFF", 4)) {
if(format_is_wave)
fprintf(stderr, "WARNING: %s is not a WAVE file, treating as a raw file\n", argv[i]);
format_is_wave = false;
}
else
format_is_wave = true;
}
for(h = n-1; h >= 0; h--)
ungetc(head[h], encode_infile);
}
if(!format_is_wave) {
if(format_is_big_endian < 0 || format_channels < 0 || format_bps < 0 || format_sample_rate < 0)
@@ -332,9 +365,9 @@ int main(int argc, char *argv[])
return decode_raw(argv[i], test_only? 0 : argv[i+1], analyze, aopts, verbose, skip, format_is_big_endian, format_is_unsigned_samples);
else
if(format_is_wave)
return encode_wav(argv[i], argv[i+1], verbose, skip, verify, lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, (unsigned)blocksize, qlp_coeff_precision, padding, requested_seek_points, num_requested_seek_points);
return encode_wav(encode_infile, argv[i], argv[i+1], verbose, skip, verify, lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, (unsigned)blocksize, qlp_coeff_precision, padding, requested_seek_points, num_requested_seek_points);
else
return encode_raw(argv[i], argv[i+1], verbose, skip, verify, lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, (unsigned)blocksize, qlp_coeff_precision, padding, requested_seek_points, num_requested_seek_points, format_is_big_endian, format_is_unsigned_samples, format_channels, format_bps, format_sample_rate);
return encode_raw(encode_infile, argv[i], argv[i+1], verbose, skip, verify, lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, (unsigned)blocksize, qlp_coeff_precision, padding, requested_seek_points, num_requested_seek_points, format_is_big_endian, format_is_unsigned_samples, format_channels, format_bps, format_sample_rate);
return 0;
}