+ if (!infile)
+ return;
+ fclose(infile);
+ infile = NULL;
+}
+
+static int aac_find_stsz(unsigned char *buf, unsigned buflen, size_t *skip)
+{
+ int i;
+
+ for (i = 0; i + 16 < buflen; i++) {
+ unsigned char *p = buf + i;
+ unsigned sample_count, sample_size;
+
+ if (p[0] != 's' || p[1] != 't' || p[2] != 's' || p[3] != 'z')
+ continue;
+ PARA_INFO_LOG("found stsz@%d\n", i);
+ i += 8;
+ sample_size = aac_read_int32(buf + i);
+ PARA_INFO_LOG("sample size: %d\n", sample_size);
+ i += 4;
+ sample_count = aac_read_int32(buf + i);
+ i += 4;
+ PARA_INFO_LOG("sample count: %d\n", sample_count);
+ *skip = i;
+ return sample_count;
+ }
+ PARA_WARNING_LOG("stsz not found, buflen: %d\n", buflen);
+ return -E_STSZ;
+}
+
+static int read_chunk_table(size_t skip)
+{
+ int ret, i;
+ size_t sum = 0;
+
+ for (;;) {
+ ret = aac_find_stsz(inbuf, inbuf_len, &skip);
+ if (ret >= 0)
+ break;
+ ret = read(fileno(infile), inbuf, inbuf_size);
+ if (ret <= 0)
+ return -E_AAC_READ;
+ PARA_INFO_LOG("next buffer: %d bytes\n", ret);
+ }
+ num_chunks = ret;
+ PARA_INFO_LOG("sz table has %zu entries\n", num_chunks);
+ free(chunk_table);
+ chunk_table = para_malloc(num_chunks * sizeof(size_t));
+ for (i = 0; i < num_chunks; i++) {
+ if (skip + 4 > inbuf_len) {
+ skip = inbuf_len - skip;
+ memmove(inbuf, inbuf + inbuf_len - skip, skip);
+ ret = read(fileno(infile), inbuf + skip, inbuf_size - skip);
+ if (ret <= 0)
+ return -E_AAC_READ;
+ inbuf_len = ret + skip;
+ skip = 0;
+ PARA_INFO_LOG("next buffer: %zu bytes\n", inbuf_len);
+ }
+ sum += aac_read_int32(inbuf + skip);
+ chunk_table[i] = sum;
+ skip += 4;
+ if (i < 10 || i + 10 > num_chunks)
+ PARA_DEBUG_LOG("offset #%d: %zu\n", i, chunk_table[i]);
+ }
+ return 1;
+}
+
+static long unsigned aac_set_chunk_tv(mp4AudioSpecificConfig *mp4ASC)
+{
+ float tmp = mp4ASC->sbr_present_flag == 1? 2047 : 1023,
+ ms = 1000.0 * num_chunks * tmp / mp4ASC->samplingFrequency;
+ struct timeval total;
+
+ ms2tv(ms, &total);
+ tv_divide(num_chunks, &total, &af->chunk_tv);
+ PARA_INFO_LOG("%luHz, %fs (%zd x %lums)\n",
+ mp4ASC->samplingFrequency, ms / 1000,
+ num_chunks, tv2ms(&af->chunk_tv));
+ return ms / 1000;