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-rw-r--r--libFLAC/md5.c318
1 files changed, 206 insertions, 112 deletions
diff --git a/libFLAC/md5.c b/libFLAC/md5.c
index 37cef67..e5adc3e 100644
--- a/libFLAC/md5.c
+++ b/libFLAC/md5.c
@@ -1,4 +1,4 @@
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
@@ -7,10 +7,7 @@
#include "private/md5.h"
#include "share/alloc.h"
-
-#ifndef FLaC__INLINE
-#define FLaC__INLINE
-#endif
+#include "share/endswap.h"
/*
* This code implements the MD5 message-digest algorithm.
@@ -143,7 +140,7 @@ static void byteSwap(FLAC__uint32 *buf, unsigned words)
{
register FLAC__uint32 x;
do {
- x = *buf;
+ x = *buf;
x = ((x << 8) & 0xff00ff00) | ((x >> 8) & 0x00ff00ff);
*buf++ = (x >> 16) | (x << 16);
} while (--words);
@@ -227,7 +224,7 @@ void FLAC__MD5Init(FLAC__MD5Context *ctx)
ctx->bytes[0] = 0;
ctx->bytes[1] = 0;
- ctx->internal_buf = 0;
+ ctx->internal_buf.p8= 0;
ctx->capacity = 0;
}
@@ -263,69 +260,135 @@ void FLAC__MD5Final(FLAC__byte digest[16], FLAC__MD5Context *ctx)
byteSwap(ctx->buf, 4);
memcpy(digest, ctx->buf, 16);
- memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */
- if(0 != ctx->internal_buf) {
- free(ctx->internal_buf);
- ctx->internal_buf = 0;
+ if (0 != ctx->internal_buf.p8) {
+ free(ctx->internal_buf.p8);
+ ctx->internal_buf.p8= 0;
ctx->capacity = 0;
}
+ memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */
}
/*
* Convert the incoming audio signal to a byte stream
*/
-static void format_input_(FLAC__byte *buf, const FLAC__int32 * const signal[], unsigned channels, unsigned samples, unsigned bytes_per_sample)
+static void format_input_(FLAC__multibyte *mbuf, const FLAC__int32 * const signal[], unsigned channels, unsigned samples, unsigned bytes_per_sample)
{
+ FLAC__byte *buf_ = mbuf->p8;
+ FLAC__int16 *buf16 = mbuf->p16;
+ FLAC__int32 *buf32 = mbuf->p32;
+ FLAC__int32 a_word;
unsigned channel, sample;
- register FLAC__int32 a_word;
- register FLAC__byte *buf_ = buf;
-#if WORDS_BIGENDIAN
-#else
- if(channels == 2 && bytes_per_sample == 2) {
- FLAC__int16 *buf1_ = ((FLAC__int16*)buf_) + 1;
- memcpy(buf_, signal[0], sizeof(FLAC__int32) * samples);
- for(sample = 0; sample < samples; sample++, buf1_+=2)
- *buf1_ = (FLAC__int16)signal[1][sample];
- }
- else if(channels == 1 && bytes_per_sample == 2) {
- FLAC__int16 *buf1_ = (FLAC__int16*)buf_;
- for(sample = 0; sample < samples; sample++)
- *buf1_++ = (FLAC__int16)signal[0][sample];
- }
- else
-#endif
- if(bytes_per_sample == 2) {
- if(channels == 2) {
- for(sample = 0; sample < samples; sample++) {
- a_word = signal[0][sample];
- *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
- *buf_++ = (FLAC__byte)a_word;
- a_word = signal[1][sample];
- *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
- *buf_++ = (FLAC__byte)a_word;
+ /* Storage in the output buffer, buf, is little endian. */
+
+#define BYTES_CHANNEL_SELECTOR(bytes, channels) (bytes * 100 + channels)
+
+ /* First do the most commonly used combinations. */
+ switch (BYTES_CHANNEL_SELECTOR (bytes_per_sample, channels)) {
+ /* One byte per sample. */
+ case (BYTES_CHANNEL_SELECTOR (1, 1)):
+ for (sample = 0; sample < samples; sample++)
+ *buf_++ = signal[0][sample];
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (1, 2)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf_++ = signal[0][sample];
+ *buf_++ = signal[1][sample];
}
- }
- else if(channels == 1) {
- for(sample = 0; sample < samples; sample++) {
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (1, 4)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf_++ = signal[0][sample];
+ *buf_++ = signal[1][sample];
+ *buf_++ = signal[2][sample];
+ *buf_++ = signal[3][sample];
+ }
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (1, 6)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf_++ = signal[0][sample];
+ *buf_++ = signal[1][sample];
+ *buf_++ = signal[2][sample];
+ *buf_++ = signal[3][sample];
+ *buf_++ = signal[4][sample];
+ *buf_++ = signal[5][sample];
+ }
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (1, 8)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf_++ = signal[0][sample];
+ *buf_++ = signal[1][sample];
+ *buf_++ = signal[2][sample];
+ *buf_++ = signal[3][sample];
+ *buf_++ = signal[4][sample];
+ *buf_++ = signal[5][sample];
+ *buf_++ = signal[6][sample];
+ *buf_++ = signal[7][sample];
+ }
+ return;
+
+ /* Two bytes per sample. */
+ case (BYTES_CHANNEL_SELECTOR (2, 1)):
+ for (sample = 0; sample < samples; sample++)
+ *buf16++ = H2LE_16(signal[0][sample]);
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (2, 2)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf16++ = H2LE_16(signal[0][sample]);
+ *buf16++ = H2LE_16(signal[1][sample]);
+ }
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (2, 4)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf16++ = H2LE_16(signal[0][sample]);
+ *buf16++ = H2LE_16(signal[1][sample]);
+ *buf16++ = H2LE_16(signal[2][sample]);
+ *buf16++ = H2LE_16(signal[3][sample]);
+ }
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (2, 6)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf16++ = H2LE_16(signal[0][sample]);
+ *buf16++ = H2LE_16(signal[1][sample]);
+ *buf16++ = H2LE_16(signal[2][sample]);
+ *buf16++ = H2LE_16(signal[3][sample]);
+ *buf16++ = H2LE_16(signal[4][sample]);
+ *buf16++ = H2LE_16(signal[5][sample]);
+ }
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (2, 8)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf16++ = H2LE_16(signal[0][sample]);
+ *buf16++ = H2LE_16(signal[1][sample]);
+ *buf16++ = H2LE_16(signal[2][sample]);
+ *buf16++ = H2LE_16(signal[3][sample]);
+ *buf16++ = H2LE_16(signal[4][sample]);
+ *buf16++ = H2LE_16(signal[5][sample]);
+ *buf16++ = H2LE_16(signal[6][sample]);
+ *buf16++ = H2LE_16(signal[7][sample]);
+ }
+ return;
+
+ /* Three bytes per sample. */
+ case (BYTES_CHANNEL_SELECTOR (3, 1)):
+ for (sample = 0; sample < samples; sample++) {
a_word = signal[0][sample];
*buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
*buf_++ = (FLAC__byte)a_word;
}
- }
- else {
- for(sample = 0; sample < samples; sample++) {
- for(channel = 0; channel < channels; channel++) {
- a_word = signal[channel][sample];
- *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
- *buf_++ = (FLAC__byte)a_word;
- }
- }
- }
- }
- else if(bytes_per_sample == 3) {
- if(channels == 2) {
- for(sample = 0; sample < samples; sample++) {
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (3, 2)):
+ for (sample = 0; sample < samples; sample++) {
a_word = signal[0][sample];
*buf_++ = (FLAC__byte)a_word; a_word >>= 8;
*buf_++ = (FLAC__byte)a_word; a_word >>= 8;
@@ -335,60 +398,90 @@ static void format_input_(FLAC__byte *buf, const FLAC__int32 * const signal[], u
*buf_++ = (FLAC__byte)a_word; a_word >>= 8;
*buf_++ = (FLAC__byte)a_word;
}
- }
- else if(channels == 1) {
- for(sample = 0; sample < samples; sample++) {
- a_word = signal[0][sample];
- *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
- *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
- *buf_++ = (FLAC__byte)a_word;
+ return;
+
+ /* Four bytes per sample. */
+ case (BYTES_CHANNEL_SELECTOR (4, 1)):
+ for (sample = 0; sample < samples; sample++)
+ *buf32++ = H2LE_32(signal[0][sample]);
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (4, 2)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf32++ = H2LE_32(signal[0][sample]);
+ *buf32++ = H2LE_32(signal[1][sample]);
}
- }
- else {
- for(sample = 0; sample < samples; sample++) {
- for(channel = 0; channel < channels; channel++) {
- a_word = signal[channel][sample];
- *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
- *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
- *buf_++ = (FLAC__byte)a_word;
- }
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (4, 4)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf32++ = H2LE_32(signal[0][sample]);
+ *buf32++ = H2LE_32(signal[1][sample]);
+ *buf32++ = H2LE_32(signal[2][sample]);
+ *buf32++ = H2LE_32(signal[3][sample]);
}
- }
- }
- else if(bytes_per_sample == 1) {
- if(channels == 2) {
- for(sample = 0; sample < samples; sample++) {
- a_word = signal[0][sample];
- *buf_++ = (FLAC__byte)a_word;
- a_word = signal[1][sample];
- *buf_++ = (FLAC__byte)a_word;
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (4, 6)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf32++ = H2LE_32(signal[0][sample]);
+ *buf32++ = H2LE_32(signal[1][sample]);
+ *buf32++ = H2LE_32(signal[2][sample]);
+ *buf32++ = H2LE_32(signal[3][sample]);
+ *buf32++ = H2LE_32(signal[4][sample]);
+ *buf32++ = H2LE_32(signal[5][sample]);
}
- }
- else if(channels == 1) {
- for(sample = 0; sample < samples; sample++) {
- a_word = signal[0][sample];
- *buf_++ = (FLAC__byte)a_word;
+ return;
+
+ case (BYTES_CHANNEL_SELECTOR (4, 8)):
+ for (sample = 0; sample < samples; sample++) {
+ *buf32++ = H2LE_32(signal[0][sample]);
+ *buf32++ = H2LE_32(signal[1][sample]);
+ *buf32++ = H2LE_32(signal[2][sample]);
+ *buf32++ = H2LE_32(signal[3][sample]);
+ *buf32++ = H2LE_32(signal[4][sample]);
+ *buf32++ = H2LE_32(signal[5][sample]);
+ *buf32++ = H2LE_32(signal[6][sample]);
+ *buf32++ = H2LE_32(signal[7][sample]);
}
- }
- else {
- for(sample = 0; sample < samples; sample++) {
- for(channel = 0; channel < channels; channel++) {
+ return;
+
+ default:
+ break;
+ }
+
+ /* General version. */
+ switch (bytes_per_sample) {
+ case 1:
+ for (sample = 0; sample < samples; sample++)
+ for (channel = 0; channel < channels; channel++)
+ *buf_++ = signal[channel][sample];
+ return;
+
+ case 2:
+ for (sample = 0; sample < samples; sample++)
+ for (channel = 0; channel < channels; channel++)
+ *buf16++ = H2LE_16(signal[channel][sample]);
+ return;
+
+ case 3:
+ for (sample = 0; sample < samples; sample++)
+ for (channel = 0; channel < channels; channel++) {
a_word = signal[channel][sample];
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
+ *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
*buf_++ = (FLAC__byte)a_word;
}
- }
- }
- }
- else { /* bytes_per_sample == 4, maybe optimize more later */
- for(sample = 0; sample < samples; sample++) {
- for(channel = 0; channel < channels; channel++) {
- a_word = signal[channel][sample];
- *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
- *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
- *buf_++ = (FLAC__byte)a_word; a_word >>= 8;
- *buf_++ = (FLAC__byte)a_word;
- }
- }
+ return;
+
+ case 4:
+ for (sample = 0; sample < samples; sample++)
+ for (channel = 0; channel < channels; channel++)
+ *buf32++ = H2LE_32(signal[channel][sample]);
+ return;
+
+ default:
+ break;
}
}
@@ -400,25 +493,26 @@ FLAC__bool FLAC__MD5Accumulate(FLAC__MD5Context *ctx, const FLAC__int32 * const
const size_t bytes_needed = (size_t)channels * (size_t)samples * (size_t)bytes_per_sample;
/* overflow check */
- if((size_t)channels > SIZE_MAX / (size_t)bytes_per_sample)
+ if ((size_t)channels > SIZE_MAX / (size_t)bytes_per_sample)
return false;
- if((size_t)channels * (size_t)bytes_per_sample > SIZE_MAX / (size_t)samples)
+ if ((size_t)channels * (size_t)bytes_per_sample > SIZE_MAX / (size_t)samples)
return false;
- if(ctx->capacity < bytes_needed) {
- FLAC__byte *tmp = (FLAC__byte*)realloc(ctx->internal_buf, bytes_needed);
- if(0 == tmp) {
- free(ctx->internal_buf);
- if(0 == (ctx->internal_buf = (FLAC__byte*)safe_malloc_(bytes_needed)))
+ if (ctx->capacity < bytes_needed) {
+ FLAC__byte *tmp = realloc(ctx->internal_buf.p8, bytes_needed);
+ if (0 == tmp) {
+ free(ctx->internal_buf.p8);
+ if (0 == (ctx->internal_buf.p8= safe_malloc_(bytes_needed)))
return false;
}
- ctx->internal_buf = tmp;
+ else
+ ctx->internal_buf.p8= tmp;
ctx->capacity = bytes_needed;
}
- format_input_(ctx->internal_buf, signal, channels, samples, bytes_per_sample);
+ format_input_(&ctx->internal_buf, signal, channels, samples, bytes_per_sample);
- FLAC__MD5Update(ctx, ctx->internal_buf, bytes_needed);
+ FLAC__MD5Update(ctx, ctx->internal_buf.p8, bytes_needed);
return true;
}
generated by cgit v1.1 at 2024-04-27 18:26:03 +0000