-/*
- * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- */
+/* Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/*
* based in parts on libfaad, Copyright (C) 2003-2005 M. Bakker,
* Ahead Software AG
*/
-/** \file aac_afh.c para_server's aac audio format handler */
+/** \file aac_afh.c para_server's aac audio format handler. */
+
+#include <regex.h>
+#include <neaacdec.h>
-#include "server.cmdline.h"
-#include "server.h"
-#include "afs.h"
+#include "para.h"
+#include "mp4.h"
#include "error.h"
+#include "portable_io.h"
+#include "afh.h"
#include "string.h"
-#include "aac.h"
+#include "fd.h"
-/* must be big enough to hold header */
-#define DEFAULT_INBUF_SIZE 65536
-static FILE *infile;
-static int inbuf_size;
-static unsigned char *inbuf;
-static unsigned inbuf_len;
-struct audio_format *af;
+struct aac_afh_context {
+ const void *map;
+ size_t mapsize;
+ size_t fpos;
+ struct mp4 *mp4;
+ struct mp4_callback cb;
+};
-static unsigned num_chunks, entry;
-
-static size_t *chunk_table;
-NeAACDecHandle handle;
+static ssize_t aac_afh_read_cb(void *user_data, void *dest, size_t want)
+{
+ struct aac_afh_context *c = user_data;
+ size_t have, rv;
+ if (want == 0 || c->fpos >= c->mapsize)
+ return 0;
+ have = c->mapsize - c->fpos;
+ rv = PARA_MIN(have, want);
+ PARA_DEBUG_LOG("reading %zu bytes @%zu\n", rv, c->fpos);
+ memcpy(dest, c->map + c->fpos, rv);
+ c->fpos += rv;
+ return rv;
+}
-static void aac_close_audio_file(void)
+static off_t aac_afh_seek_cb(void *user_data, off_t offset, int whence)
{
+ struct aac_afh_context *c = user_data;
+
+ if (whence == SEEK_SET)
+ c->fpos = offset;
+ else if (whence == SEEK_CUR)
+ c->fpos += offset;
+ else if (whence == SEEK_END)
+ c->fpos = c->mapsize + offset;
+ else
+ assert(false);
+ return c->fpos;
}
-static int aac_find_stsz(unsigned char *buf, unsigned buflen, unsigned *skip)
+static int aac_afh_open(const void *map, size_t mapsize, void **afh_context)
{
- int i;
+ int ret;
+ struct aac_afh_context *c = alloc(sizeof(*c));
- for (i = 0; i + 16 < buflen; i++) {
- unsigned char *p = buf + i;
- unsigned sample_count, sample_size;
+ c->map = map;
+ c->mapsize = mapsize;
+ c->fpos = 0;
+ c->cb.read = aac_afh_read_cb;
+ c->cb.seek = aac_afh_seek_cb;
+ c->cb.user_data = c;
- 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;
+ ret = mp4_open(&c->cb, &c->mp4);
+ if (ret < 0)
+ goto free_ctx;
+ *afh_context = c;
+ return 0;
+free_ctx:
+ free(c);
+ *afh_context = NULL;
+ return ret;
}
-static int read_chunk_table(unsigned skip)
+static void aac_afh_close(void *afh_context)
{
- int ret, i;
- long unsigned 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 %d 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: %d bytes\n", inbuf_len);
- }
- sum += aac_read_int32(inbuf + skip);
- chunk_table[i] = sum;
- skip += 4;
- if (i < 10 || i > num_chunks - 10)
- PARA_DEBUG_LOG("offset #%d: %d\n", i, chunk_table[i]);
- }
+ struct aac_afh_context *c = afh_context;
+ mp4_close(c->mp4);
+ free(c);
+}
+
+static int aac_afh_get_chunk(uint32_t chunk_num, void *afh_context,
+ const char **buf, uint32_t *len)
+{
+ struct aac_afh_context *c = afh_context;
+ uint32_t ss;
+ size_t offset;
+ int ret;
+
+ ret = mp4_set_sample_position(c->mp4, chunk_num);
+ if (ret < 0)
+ return ret;
+ offset = c->fpos;
+ ret = mp4_get_sample_size(c->mp4, chunk_num, &ss);
+ if (ret < 0)
+ return ret;
+ if (ss + offset > c->mapsize) /* file got truncated?! */
+ return -E_MP4_CORRUPT;
+ *buf = c->map + offset;
+ *len = ss;
return 1;
+}
+static void aac_afh_get_taginfo(const struct mp4 *mp4, struct taginfo *tags)
+{
+ tags->artist = mp4_get_tag_value(mp4, "artist");
+ tags->title = mp4_get_tag_value(mp4, "title");
+ tags->year = mp4_get_tag_value(mp4, "date");
+ tags->album = mp4_get_tag_value(mp4, "album");
+ tags->comment = mp4_get_tag_value(mp4, "comment");
}
/*
* Init m4a file and write some tech data to given pointers.
*/
-static int aac_get_file_info(FILE *file, char *info_str, long unsigned *frames,
- int *seconds)
+static int aac_get_file_info(char *map, size_t numbytes, __a_unused int fd,
+ struct afh_info *afhi)
{
- int ret, skip, decoder_len;
- unsigned long rate = 0;
- unsigned char channels = 0;
- mp4AudioSpecificConfig mp4ASC;
-
- free(inbuf);
- inbuf_size = DEFAULT_INBUF_SIZE;
- inbuf = para_malloc(inbuf_size);
- infile = file;
-
- PARA_INFO_LOG("file: %p\n", file);
- ret = read(fileno(infile), inbuf, inbuf_size);
- PARA_INFO_LOG("read %d bytes\n", ret);
- if (ret <= 0)
- return -E_AAC_READ;
- PARA_INFO_LOG("checking aac %d bytes\n", ret);
- inbuf_len = ret;
- ret = aac_find_esds(inbuf, inbuf_len, &skip);
- if (ret < 0)
- return ret;
- decoder_len = ret;
- handle = aac_open();
- ret = NeAACDecInit(handle, inbuf + skip,
- decoder_len, &rate, &channels);
- if (ret < 0)
- return -E_AACDEC_INIT;
- skip += ret;
- PARA_INFO_LOG("rate: %lu, channels: %d\n", rate, channels);
- ret = NeAACDecAudioSpecificConfig(inbuf + skip, inbuf_len - skip, &mp4ASC);
- if (ret >= 0) {
- PARA_DEBUG_LOG("mp4ASC.samplingFrequency: %lu\n",
- mp4ASC.samplingFrequency);
- } else
- PARA_WARNING_LOG("no mp4ASC %s\n", "");
-
- ret = read_chunk_table(skip);
+ int ret;
+ struct aac_afh_context *c;
+ uint64_t milliseconds;
+ const char *buf;
+ uint32_t n, len;
+
+ ret = aac_afh_open(map, numbytes, (void **)&c);
if (ret < 0)
return ret;
- *frames = num_chunks;
- for (;;) {
- ret = aac_find_entry_point(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);
- }
- entry = ret;
- PARA_INFO_LOG("offset table has %d entries\, entry: %zd\n", num_chunks,
- entry);
-#if 1
- sprintf(info_str, "audio_file_info1:%d x %lums\n"
- "audio_file_info2:\n"
- "audio_file_info3:\n",
- num_chunks,
- tv2ms(&af->chunk_tv));
-#endif
-#if 1
- {
- struct timeval total_tv;
- tv_scale(num_chunks, &af->chunk_tv, &total_tv);
- *seconds = tv2ms(&total_tv) / 1000;
- PARA_INFO_LOG("%d seconds, %d chunks\n", *seconds, num_chunks);
+
+ afhi->frequency = mp4_get_sample_rate(c->mp4);
+ assert(afhi->frequency > 0);
+ afhi->channels = mp4_get_channel_count(c->mp4);
+ assert(afhi->channels > 0);
+ afhi->chunks_total = mp4_num_samples(c->mp4);
+ assert(afhi->chunks_total > 0);
+
+ afhi->max_chunk_size = 0;
+ for (n = 0; n < afhi->chunks_total; n++) {
+ ret = aac_afh_get_chunk(n, c, &buf, &len);
+ if (ret < 0)
+ goto out;
+ afhi->max_chunk_size = PARA_MAX(afhi->max_chunk_size, len);
}
-#endif
- return 1;
+ milliseconds = mp4_get_duration(c->mp4);
+ afhi->seconds_total = milliseconds / 1000;
+ ms2tv(milliseconds / afhi->chunks_total, &afhi->chunk_tv);
+ if (aac_afh_get_chunk(0, c, &buf, &len) < 0)
+ goto out;
+ numbytes -= buf - map;
+ afhi->bitrate = 8 * numbytes / afhi->seconds_total / 1000;
+ aac_afh_get_taginfo(c->mp4, &afhi->tags);
+ ret = 1;
+out:
+ aac_afh_close(c);
+ return ret;
}
-/*
- * Simple stream reposition routine
- */
-static int aac_reposition_stream(long unsigned request)
+static ssize_t aac_afh_meta_read_cb(void *user_data, void *dest, size_t want)
{
- return 1;
-// return -E_AAC_REPOS;
+ int fd = *(int *)user_data;
+ return read(fd, dest, want);
}
-static __must_check int para_fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
+static off_t aac_afh_meta_seek_cb(void *user_data, off_t offset, int whence)
{
- size_t res = fread(ptr, size, nmemb, stream);
- if (res == nmemb)
- return size * nmemb;
- if (feof(stream))
- return 0;
- return -E_FREAD;
+ int fd = *(int *)user_data;
+ off_t ret = lseek(fd, offset, whence);
+
+ assert(ret != (off_t)-1);
+ return ret;
}
-static char *aac_read_chunk(long unsigned current_chunk, ssize_t *len)
+static ssize_t aac_afh_meta_write_cb(void *user_data, void *dest, size_t count)
{
- int ret;
- size_t pos;
-
- *len = 0;
- if (current_chunk >= num_chunks)
- return NULL;
- if (!current_chunk) {
- *len = chunk_table[0];
- pos = entry;
- } else {
- *len = chunk_table[current_chunk] - chunk_table[current_chunk - 1];
- pos = entry + chunk_table[current_chunk - 1];
- }
- if (inbuf_size < *len) {
- inbuf = para_realloc(inbuf, *len);
- inbuf_size = *len;
+ int fd = *(int *)user_data;
+ return write(fd, dest, count);
+}
+
+static int aac_afh_meta_truncate_cb(void *user_data)
+{
+ int fd = *(int *)user_data;
+ off_t offset = lseek(fd, 0, SEEK_CUR);
+ return ftruncate(fd, offset);
+}
+
+static void replace_or_add_tag(const char *item, const char *value,
+ struct mp4_metadata *meta)
+{
+ uint32_t n;
+ struct mp4_tag *t;
+
+ for (n = 0; n < meta->count; n++) {
+ t = meta->tags + n;
+ if (strcasecmp(t->item, item))
+ continue;
+ free(t->value);
+ t->value = para_strdup(value);
+ return;
}
-// PARA_DEBUG_LOG("reading chunk #%lu@%zd (%zd bytes)\n", current_chunk,
-// pos, *len);
- ret = fseek(infile, pos, SEEK_SET);
- if (ret < 0)
- return NULL;
- ret = para_fread(inbuf, *len, 1, infile);
- if (ret != *len)
- return NULL;
-// PARA_DEBUG_LOG("ret: %d, inbuf[0]: %lx - %lx\n", ret, (long unsigned) inbuf[0],
-// (long unsigned) inbuf[4]);
- return (char *)inbuf;
+ /* item not found, add new tag */
+ meta->tags = para_realloc(meta->tags, (meta->count + 1)
+ * sizeof(struct mp4_tag));
+ t = meta->tags + meta->count;
+ t->item = para_strdup(item);
+ t->value = para_strdup(value);
+ meta->count++;
}
-void aac_afh_init(void *p)
+static int aac_afh_rewrite_tags(const char *map, size_t mapsize,
+ struct taginfo *tags, int fd, __a_unused const char *filename)
{
- af = p;
- af->reposition_stream = aac_reposition_stream;
- af->get_file_info = aac_get_file_info,
- af->read_chunk = aac_read_chunk;
- af->close_audio_file = aac_close_audio_file;
- af->get_header_info = NULL;
- af->chunk_tv.tv_sec = 0;
- af->chunk_tv.tv_usec = 23120;
- tv_scale(3, &af->chunk_tv, &af->eof_tv);
+ int ret;
+ struct mp4_metadata *metadata;
+ struct mp4 *mp4;
+ struct mp4_callback cb = {
+ .read = aac_afh_meta_read_cb,
+ .seek = aac_afh_meta_seek_cb,
+ .write = aac_afh_meta_write_cb,
+ .truncate = aac_afh_meta_truncate_cb,
+ .user_data = &fd
+ };
+
+ ret = write_all(fd, map, mapsize);
+ if (ret < 0)
+ return ret;
+ lseek(fd, 0, SEEK_SET);
+
+ ret = mp4_open_meta(&cb, &mp4);
+ if (ret < 0)
+ return ret;
+ metadata = mp4_get_meta(mp4);
+ PARA_NOTICE_LOG("%u metadata item(s) found\n", metadata->count);
+ replace_or_add_tag("artist", tags->artist, metadata);
+ replace_or_add_tag("title", tags->title, metadata);
+ replace_or_add_tag("album", tags->album, metadata);
+ replace_or_add_tag("date", tags->year, metadata);
+ replace_or_add_tag("comment", tags->comment, metadata);
+ ret = mp4_update_meta(mp4);
+ mp4_close(mp4);
+ return ret;
}
+
+static const char * const aac_suffixes[] = {"m4a", "mp4", NULL};
+
+/**
+ * The audio format handler for the Advanced Audio Codec.
+ *
+ * This is only compiled in if the faad library is installed.
+ */
+const struct audio_format_handler aac_afh = {
+ .get_file_info = aac_get_file_info,
+ .suffixes = aac_suffixes,
+ .rewrite_tags = aac_afh_rewrite_tags,
+ .open = aac_afh_open,
+ .get_chunk = aac_afh_get_chunk,
+ .close = aac_afh_close,
+};
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