mirror of
https://github.com/claunia/flac.git
synced 2025-12-16 18:54:26 +00:00
add basic list functionality
This commit is contained in:
Josh Coalson
@@ -31,9 +31,17 @@
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#include "FLAC/all.h"
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static const char *sync_string_ = "fLaC"; /* DUPLICATE:FLAC__STREAM_SYNC_STRING */
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static const char *metadata_type_string_[] = { /* DUPLICATE:FLAC__MetaDataTypeString */
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"STREAMINFO",
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"PADDING",
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"APPLICATION"
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};
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static int usage(const char *message, ...);
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static bool list(FILE *f, bool verbose);
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static uint32 unpack_uint32(byte *b, unsigned bytes);
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static uint64 unpack_uint64(byte *b, unsigned bytes);
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static void hexdump(const byte *buf, unsigned bytes);
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int main(int argc, char *argv[])
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{
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@@ -113,15 +121,15 @@ int usage(const char *message, ...)
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printf("options:\n");
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printf(" -l : list metadata blocks\n");
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printf(" -v : verbose\n");
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printf(" -v- can all be used to turn off a particular option\n");
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return 1;
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}
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bool list(FILE *f, bool verbose)
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{
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static byte buf[65536];
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static byte buf[65536], *b;
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FLAC__StreamMetaData metadata;
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unsigned blocknum = 0, i;
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/* read the stream sync code */
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if(fread(buf, 1, 4, f) < 4 || memcmp(buf, sync_string_, 4)) {
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@@ -138,16 +146,163 @@ bool list(FILE *f, bool verbose)
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}
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metadata.is_last = (buf[0] & 0x80)? true:false;
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metadata.type = (FLAC__MetaDataType)(buf[0] & 0x7f);
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metadata.length = (((unsigned)buf[1]) << 16) | (((unsigned)buf[2]) << 8) | ((unsigned)buf[3]);
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metadata.length = unpack_uint32(buf+1, 3);
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/* print header */
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printf("METADATA block #%u:\n", blocknum);
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printf("type: %u (%s)\n", (unsigned)metadata.type, metadata.type<=FLAC__METADATA_TYPE_APPLICATION? metadata_type_string_[metadata.type] : "UNKNOWN");
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printf("is last: %s\n", metadata.is_last? "true":"false");
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printf("length: %u\n", metadata.length);
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if(metadata.length > sizeof(buf)) {
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printf("SKIPPING large block\n\n");
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continue;
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}
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/* read the metadata block data */
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if(fread(buf, 1, metadata.length, f) < metadata.length) {
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fprintf(stderr, "ERROR: short count reading metadata block data\n\n");
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return false;
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}
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switch(metadata.type) {
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case FLAC__METADATA_TYPE_STREAMINFO:
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b = buf;
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metadata.data.stream_info.min_blocksize = unpack_uint32(b, 2); b += 2;
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metadata.data.stream_info.max_blocksize = unpack_uint32(b, 2); b += 2;
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metadata.data.stream_info.min_framesize = unpack_uint32(b, 3); b += 3;
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metadata.data.stream_info.max_framesize = unpack_uint32(b, 3); b += 3;
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metadata.data.stream_info.sample_rate = (unpack_uint32(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
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metadata.data.stream_info.channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
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metadata.data.stream_info.bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 1) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
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metadata.data.stream_info.total_samples = (((uint64)(b[3] & 0x0f)) << 32) | unpack_uint64(b+4, 4);
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memcpy(metadata.data.stream_info.md5sum, b+8, 16);
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break;
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case FLAC__METADATA_TYPE_PADDING:
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if(verbose) {
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/* dump contents */
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}
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break;
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case FLAC__METADATA_TYPE_APPLICATION:
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memcpy(buf, metadata.data.application.id, 4);
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metadata.data.application.data = buf+4;
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break;
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default:
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printf("SKIPPING block of unknown type\n\n");
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continue;
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}
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/* print it */
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printf("METADATA block:\n");
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printf("\ttype: %u\n", (unsigned)metadata.type);
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printf("\tis last: %s\n", metadata.is_last? "true":"false");
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printf("\tlength: %u\n", metadata.length);
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/* print data */
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switch(metadata.type) {
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case FLAC__METADATA_TYPE_STREAMINFO:
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printf("minumum blocksize: %u samples\n", metadata.data.stream_info.min_blocksize);
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printf("maxumum blocksize: %u samples\n", metadata.data.stream_info.max_blocksize);
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printf("minimum framesize: %u bytes\n", metadata.data.stream_info.min_framesize);
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printf("maximum framesize: %u bytes\n", metadata.data.stream_info.max_framesize);
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printf("sample_rate: %u Hz\n", metadata.data.stream_info.sample_rate);
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printf("channels: %u\n", metadata.data.stream_info.channels);
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printf("bits-per-sample: %u\n", metadata.data.stream_info.bits_per_sample);
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printf("total samples: %llu\n", metadata.data.stream_info.total_samples);
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printf("MD5 signature: ");
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for(i = 0; i < 16; i++)
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printf("%02x", metadata.data.stream_info.md5sum[i]);
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printf("\n");
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break;
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case FLAC__METADATA_TYPE_PADDING:
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if(verbose) {
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printf("pad contents:\n");
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hexdump(buf, metadata.length);
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}
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break;
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case FLAC__METADATA_TYPE_APPLICATION:
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printf("Application ID: ");
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for(i = 0; i < 4; i++)
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printf("%02x", metadata.data.application.id[i]);
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printf("\n");
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if(verbose) {
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printf("data contents:\n");
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hexdump(metadata.data.application.data, metadata.length);
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}
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break;
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default:
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assert(0);
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}
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if(!metadata.is_last)
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printf("\n");
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blocknum++;
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} while (!metadata.is_last);
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return true;
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}
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static uint32 unpack_uint32(byte *b, unsigned bytes)
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{
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uint32 ret = 0;
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unsigned i;
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for(i = 0; i < bytes; i++)
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ret = (ret << 8) | (uint32)(*b++);
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return ret;
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}
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static uint64 unpack_uint64(byte *b, unsigned bytes)
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{
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uint64 ret = 0;
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unsigned i;
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for(i = 0; i < bytes; i++)
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ret = (ret << 8) | (uint64)(*b++);
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return ret;
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}
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void hexdump(const byte *buf, unsigned bytes)
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{
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unsigned i, left = bytes;
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const byte *b = buf;
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for(i = 0; i < bytes; i += 16) {
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printf("%08X: "
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"%02X %02X %02X %02X %02X %02X %02X %02X "
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"%02X %02X %02X %02X %02X %02X %02X %02X "
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"%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c\n",
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i,
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left > 0? (unsigned char)b[ 0] : 0,
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left > 1? (unsigned char)b[ 1] : 0,
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left > 2? (unsigned char)b[ 2] : 0,
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left > 3? (unsigned char)b[ 3] : 0,
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left > 4? (unsigned char)b[ 4] : 0,
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left > 5? (unsigned char)b[ 5] : 0,
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left > 6? (unsigned char)b[ 6] : 0,
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left > 7? (unsigned char)b[ 7] : 0,
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left > 8? (unsigned char)b[ 8] : 0,
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left > 9? (unsigned char)b[ 9] : 0,
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left > 10? (unsigned char)b[10] : 0,
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left > 11? (unsigned char)b[11] : 0,
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left > 12? (unsigned char)b[12] : 0,
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left > 13? (unsigned char)b[13] : 0,
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left > 14? (unsigned char)b[14] : 0,
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left > 15? (unsigned char)b[15] : 0,
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(left > 0) ? (isprint(b[ 0]) ? b[ 0] : '.') : ' ',
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(left > 1) ? (isprint(b[ 1]) ? b[ 1] : '.') : ' ',
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(left > 2) ? (isprint(b[ 2]) ? b[ 2] : '.') : ' ',
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(left > 3) ? (isprint(b[ 3]) ? b[ 3] : '.') : ' ',
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(left > 4) ? (isprint(b[ 4]) ? b[ 4] : '.') : ' ',
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(left > 5) ? (isprint(b[ 5]) ? b[ 5] : '.') : ' ',
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(left > 6) ? (isprint(b[ 6]) ? b[ 6] : '.') : ' ',
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(left > 7) ? (isprint(b[ 7]) ? b[ 7] : '.') : ' ',
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(left > 8) ? (isprint(b[ 8]) ? b[ 8] : '.') : ' ',
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(left > 9) ? (isprint(b[ 9]) ? b[ 9] : '.') : ' ',
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(left > 10) ? (isprint(b[10]) ? b[10] : '.') : ' ',
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(left > 11) ? (isprint(b[11]) ? b[11] : '.') : ' ',
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(left > 12) ? (isprint(b[12]) ? b[12] : '.') : ' ',
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(left > 13) ? (isprint(b[13]) ? b[13] : '.') : ' ',
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(left > 14) ? (isprint(b[14]) ? b[14] : '.') : ' ',
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(left > 15) ? (isprint(b[15]) ? b[15] : '.') : ' '
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);
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left -= 16;
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b += 16;
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}
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}
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