/*
- * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2008 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file aac_afh.c para_server's aac audio format handler */
+#include <regex.h>
+
#include "para.h"
#include "error.h"
-#include "string.h"
#include "afh.h"
-#include "afs.h"
-#include "server.h"
+#include "string.h"
#include "aac.h"
static int aac_find_stsz(unsigned char *buf, size_t buflen, off_t *skip)
return -E_STSZ;
}
-static ssize_t aac_compute_chunk_table(struct audio_format_info *afi,
+static int atom_cmp(unsigned char *buf1, char *buf2)
+{
+ unsigned char *b2 = (unsigned char *)buf2;
+
+ if (buf1[0] != b2[0])
+ return 1;
+ if (buf1[1] != b2[1])
+ return 1;
+ if (buf1[2] != b2[2])
+ return 1;
+ if (buf1[3] != b2[3])
+ return 1;
+ return 0;
+}
+
+static int read_atom_header(unsigned char *buf, uint64_t *subsize, unsigned char type[5])
+{
+ int i;
+ uint64_t size = (buf[0] << 24) + (buf[1] << 16) + (buf[2] << 8) + buf[3];
+
+ memcpy(type, buf + 4, 4);
+ type[4] = '\0';
+
+ PARA_DEBUG_LOG("size: %llu, type: %s\n", (long long unsigned)size, type);
+ if (size != 1) {
+ *subsize = size;
+ return 8;
+ }
+ buf += 4;
+ size = 0;
+ for (i = 0; i < 8; i++)
+ size |= ((uint64_t)buf[i]) << ((7 - i) * 8);
+ *subsize = size;
+ return 16;
+}
+
+static char *get_tag(unsigned char *p, int size)
+{
+ char *buf;
+
+ assert(size > 0);
+ buf = para_malloc(size + 1);
+
+ memcpy(buf, p, size);
+ buf[size] = '\0';
+ PARA_DEBUG_LOG("size: %d: %s\n", size, buf);
+ return buf;
+}
+
+static void read_tags(unsigned char *buf, size_t buflen, struct afh_info *afhi)
+{
+ unsigned char *p = buf;
+
+ while (p + 32 < buf + buflen) {
+ unsigned char *q, type1[5], type2[5];
+ uint64_t size1, size2;
+ int ret, ret2;
+
+ ret = read_atom_header(p, &size1, type1);
+ ret2 = read_atom_header(p + ret, &size2, type2);
+
+ if (size2 <= 16 || atom_cmp(type2, "data")) {
+ p += size1;
+ continue;
+ }
+ size2 -= 16;
+ q = p + ret + ret2 + 8;
+ if (q + size2 > buf + buflen)
+ break;
+ if (!atom_cmp(type1, "©ART"))
+ afhi->tags.artist = get_tag(q, size2);
+ else if (!atom_cmp(type1, "©alb"))
+ afhi->tags.album = get_tag(q, size2);
+ else if (!atom_cmp(type1, "©nam"))
+ afhi->tags.title = get_tag(q, size2);
+ else if (!atom_cmp(type1, "©cmt"))
+ afhi->tags.comment = get_tag(q, size2);
+ else if (!atom_cmp(type1, "©day"))
+ afhi->tags.year = get_tag(q, size2);
+ p += size1;
+ }
+}
+
+static void read_meta(unsigned char *buf, size_t buflen, struct afh_info *afhi)
+{
+ unsigned char *p = buf;
+
+ while (p + 4 < buf + buflen) {
+
+ if (p[0] != 'i' || p[1] != 'l' || p[2] != 's' || p[3] != 't') {
+ p++;
+ continue;
+ }
+ p += 4;
+ return read_tags(p, buflen - (p - buf), afhi);
+ }
+}
+
+static void aac_get_taginfo(unsigned char *buf, size_t buflen,
+ struct afh_info *afhi)
+{
+ int i;
+ uint64_t subsize;
+ unsigned char type[5];
+
+ for (i = 0; i + 24 < buflen; i++) {
+ unsigned char *p = buf + i;
+ if (p[0] != 'm' || p[1] != 'e' || p[2] != 't' || p[3] != 'a')
+ continue;
+ PARA_INFO_LOG("found metadata at offset %d\n", i);
+ i += 8;
+ p = buf + i;
+ i += read_atom_header(p, &subsize, type);
+ p = buf + i;
+ return read_meta(p, buflen - i, afhi);
+ }
+ PARA_INFO_LOG("no meta data\n");
+}
+
+static ssize_t aac_compute_chunk_table(struct afh_info *afhi,
unsigned char *map, size_t numbytes)
{
int ret, i;
ret = aac_find_stsz(map, numbytes, &skip);
if (ret < 0)
return ret;
- afi->chunks_total = ret;
- PARA_DEBUG_LOG("sz table has %lu entries\n", afi->chunks_total);
- afi->chunk_table = para_malloc((afi->chunks_total + 1) * sizeof(size_t));
- for (i = 1; i <= afi->chunks_total; i++) {
+ afhi->chunks_total = ret;
+ PARA_DEBUG_LOG("sz table has %lu entries\n", afhi->chunks_total);
+ afhi->chunk_table = para_malloc((afhi->chunks_total + 1) * sizeof(size_t));
+ for (i = 1; i <= afhi->chunks_total; i++) {
if (skip + 4 > numbytes)
break;
sum += aac_read_int32(map + skip);
- afi->chunk_table[i] = sum;
+ afhi->chunk_table[i] = sum;
skip += 4;
-// if (i < 10 || i + 10 > afi->chunks_total)
-// PARA_DEBUG_LOG("offset #%d: %zu\n", i, afi->chunk_table[i]);
+// if (i < 10 || i + 10 > afhi->chunks_total)
+// PARA_DEBUG_LOG("offset #%d: %zu\n", i, afhi->chunk_table[i]);
}
return skip;
}
-static int aac_set_chunk_tv(struct audio_format_info *afi,
+static int aac_set_chunk_tv(struct afh_info *afhi,
mp4AudioSpecificConfig *mp4ASC, long unsigned *seconds)
{
float tmp = mp4ASC->sbr_present_flag == 1? 2047 : 1023;
struct timeval total;
- long unsigned ms = 1000.0 * afi->chunks_total * tmp
+ long unsigned ms = 1000.0 * afhi->chunks_total * tmp
/ mp4ASC->samplingFrequency;
if (!mp4ASC->samplingFrequency)
return -E_MP4ASC;
- ms = 1000.0 * afi->chunks_total * tmp / mp4ASC->samplingFrequency;
+ ms = 1000.0 * afhi->chunks_total * tmp / mp4ASC->samplingFrequency;
ms2tv(ms, &total);
- tv_divide(afi->chunks_total, &total, &afi->chunk_tv);
+ tv_divide(afhi->chunks_total, &total, &afhi->chunk_tv);
PARA_INFO_LOG("%luHz, %lus (%lu x %lums)\n",
mp4ASC->samplingFrequency, ms / 1000,
- afi->chunks_total, tv2ms(&afi->chunk_tv));
+ afhi->chunks_total, tv2ms(&afhi->chunk_tv));
if (ms < 1000)
return -E_MP4ASC;
*seconds = ms / 1000;
/*
* Init m4a file and write some tech data to given pointers.
*/
-static int aac_get_file_info(char *map, size_t numbytes,
- struct audio_format_info *afi)
+static int aac_get_file_info(char *map, size_t numbytes, __a_unused int fd,
+ struct afh_info *afhi)
{
int i;
size_t skip;
ret = aac_find_esds(umap, numbytes, &skip, &decoder_len);
if (ret < 0)
goto out;
+ aac_get_taginfo(umap, numbytes, afhi);
handle = aac_open();
ret = -E_AAC_AFH_INIT;
if (NeAACDecInit(handle, umap + skip, decoder_len, &rate, &channels))
goto out;
if (!mp4ASC.samplingFrequency)
goto out;
- ret = aac_compute_chunk_table(afi, umap, numbytes);
+ ret = aac_compute_chunk_table(afhi, umap, numbytes);
if (ret < 0)
goto out;
skip = ret;
- ret = aac_set_chunk_tv(afi, &mp4ASC, &afi->seconds_total);
+ ret = aac_set_chunk_tv(afhi, &mp4ASC, &afhi->seconds_total);
if (ret < 0)
goto out;
ret = aac_find_entry_point(umap + skip, numbytes - skip, &skip);
if (ret < 0)
goto out;
- afi->chunk_table[0] = ret;
- for (i = 1; i<= afi->chunks_total; i++)
- afi->chunk_table[i] += ret;
- afi->channels = channels;
- afi->frequency = rate;
- ret = (afi->chunk_table[afi->chunks_total] - afi->chunk_table[0]) * 8; /* bits */
- ret += (channels * afi->seconds_total * 500); /* avoid rounding error */
- afi->bitrate = ret / (channels * afi->seconds_total * 1000);
- sprintf(afi->info_string, "audio_file_info1:%lu x %lums, "
- "%uHz, %d channel%s, %ukb/s\n"
- "audio_file_info2:\n"
- "audio_file_info3:\n",
- afi->chunks_total, tv2ms(&afi->chunk_tv),
- afi->frequency, channels, channels == 1? "" : "s", afi->bitrate
- );
- tv_scale(20, &afi->chunk_tv, &afi->eof_tv);
+ afhi->chunk_table[0] = ret;
+ for (i = 1; i<= afhi->chunks_total; i++)
+ afhi->chunk_table[i] += ret;
+ afhi->channels = channels;
+ afhi->frequency = rate;
+ ret = (afhi->chunk_table[afhi->chunks_total] - afhi->chunk_table[0]) * 8; /* bits */
+ ret += (channels * afhi->seconds_total * 500); /* avoid rounding error */
+ afhi->bitrate = ret / (channels * afhi->seconds_total * 1000);
ret = 1;
out:
if (handle)
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