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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "check_aec.h"
#define BUF_SIZE 1024 * 3
void shift_cdata(struct test_state *state, unsigned char *cbuf_unshifted,
int byte_offset, int bit_offset)
{
struct aec_stream *strm = state->strm;
unsigned char *dst = state->cbuf + byte_offset;
memset(state->cbuf, 0, state->buf_len);
for (size_t i = 0; i < strm->avail_in; i++) {
dst[i] |= cbuf_unshifted[i] >> bit_offset;
dst[i + 1] |= cbuf_unshifted[i] << (8 - bit_offset);
}
}
int encode_decode_large_seek(struct test_state *state)
{
int status;
int bflags = 0;
int c_len;
size_t to;
char fbase[1024];
unsigned char *cbuf_unshifted;
struct aec_stream *strm = state->strm;
strm->avail_in = state->ibuf_len;
strm->avail_out = state->cbuf_len;
strm->next_in = state->ubuf;
strm->next_out = state->cbuf;
status = aec_encode_init(strm);
if (status != AEC_OK) {
printf("Init failed.\n");
return 99;
}
if (state->dump) {
char fname[1024 + 4];
FILE *fp;
snprintf(fbase, sizeof(fbase), "BPS%02iID%iBS%02iRSI%04iFLG%04i",
strm->bits_per_sample,
state->id,
strm->block_size,
strm->rsi,
strm->flags);
snprintf(fname, sizeof(fname), "%s.dat", fbase);
if ((fp = fopen(fname, "wb")) == NULL) {
fprintf(stderr, "ERROR: cannot open dump file %s\n", fname);
return 99;
}
fputc(strm->bits_per_sample, fp);
bflags = strm->block_size >> 8;
if (strm->flags | AEC_DATA_MSB)
bflags |= 0x80;
if (strm->flags | AEC_DATA_SIGNED)
bflags |= 0x40;
if (strm->flags | AEC_DATA_3BYTE)
bflags |= 0x10;
bflags |= 0x20; /* encode */
fputc(bflags, fp);
fwrite(strm->next_in, strm->avail_in, 1, fp);
fclose(fp);
}
status = aec_encode(strm, AEC_FLUSH);
if (status != AEC_OK) {
printf("Encode failed.\n");
return 99;
}
aec_encode_end(strm);
if (state->dump) {
char fname[1024 + 3];
FILE *fp;
snprintf(fname, sizeof(fname), "%s.rz", fbase);
if ((fp = fopen(fname, "wb")) == NULL) {
fprintf(stderr, "ERROR: cannot open dump file %s\n", fname);
return 99;
}
fputc(strm->bits_per_sample, fp);
bflags &= ~0x20;
fputc(bflags, fp);
fwrite(state->cbuf, strm->total_out, 1, fp);
fclose(fp);
}
cbuf_unshifted = (unsigned char *)malloc(state->cbuf_len);
if (!cbuf_unshifted) {
fprintf(stderr, "Not enough memory.\n");
return 99;
}
c_len = strm->total_out;
memcpy(cbuf_unshifted, state->cbuf, c_len);
for (int byte_offset = 0; byte_offset < 256; byte_offset++) {
for (int bit_offset = 0; bit_offset < 8; bit_offset++) {
strm->avail_in = c_len;
strm->avail_out = state->buf_len;
strm->next_in = state->cbuf;
strm->next_out = state->obuf;
to = strm->total_out;
shift_cdata(state, cbuf_unshifted, byte_offset, bit_offset);
status = aec_decode_init(strm);
if (status != AEC_OK) {
printf("Init failed.\n");
return 99;
}
status = aec_buffer_seek(strm, byte_offset * 8 + bit_offset);
if (status != AEC_OK) {
printf("Seeking failed.\n");
return 99;
}
status = aec_decode(strm, AEC_FLUSH);
if (status != AEC_OK) {
printf("Decode failed.\n");
return 99;
}
if (memcmp(state->ubuf, state->obuf, state->ibuf_len)) {
printf("\n%s: Uncompressed output differs from input.\n",
CHECK_FAIL);
printf("\nuncompressed buf");
for (int i = 0; i < 80; i++) {
if (i % 8 == 0)
printf("\n");
printf("%02x ", state->ubuf[i]);
}
printf("\n\ncompressed buf len %zu", to);
for (int i = 0; i < 80; i++) {
if (i % 8 == 0)
printf("\n");
printf("%02x ", state->cbuf[i]);
}
printf("\n\ndecompressed buf");
for (int i = 0; i < 80; i++) {
if (i % 8 == 0)
printf("\n");
printf("%02x ", state->obuf[i]);
}
printf("\n");
return 99;
}
aec_decode_end(strm);
}
}
return 0;
}
int check_block_sizes_seek(struct test_state *state)
{
for (int bs = 8; bs <= 64; bs *= 2) {
int status;
state->strm->block_size = bs;
state->strm->rsi = (int)(state->buf_len
/ (bs * state->bytes_per_sample));
status = encode_decode_large_seek(state);
if (status)
return status;
}
return 0;
}
int check_rsi_seek(struct test_state *state)
{
int status;
int size = state->bytes_per_sample;
for (unsigned char *tmp = state->ubuf;
tmp < state->ubuf + state->buf_len;
tmp += 2 * state->bytes_per_sample) {
state->out(tmp, state->xmax - ((state->ubuf - tmp) % 64), size);
state->out(tmp + size, state->xmin, size);
}
printf("Checking seeking ... ");
status = check_block_sizes_seek(state);
if (status)
return status;
printf ("%s\n", CHECK_PASS);
return 0;
}
int main (void)
{
int status;
struct aec_stream strm;
struct test_state state;
state.dump = 0;
state.buf_len = state.ibuf_len = BUF_SIZE;
state.cbuf_len = 3 * BUF_SIZE;
state.ubuf = (unsigned char *)malloc(state.buf_len);
state.cbuf = (unsigned char *)malloc(state.cbuf_len);
state.obuf = (unsigned char *)malloc(state.buf_len);
if (!state.ubuf || !state.cbuf || !state.obuf) {
printf("Not enough memory.\n");
status = 99;
goto DESTRUCT;
}
strm.flags = AEC_DATA_PREPROCESS;
state.strm = &strm;
strm.bits_per_sample = 32;
update_state(&state);
status = check_rsi_seek(&state);
if (status)
goto DESTRUCT;
DESTRUCT:
if (state.ubuf)
free(state.ubuf);
if (state.cbuf)
free(state.cbuf);
if (state.obuf)
free(state.obuf);
return status;
}
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