-/*
- * Copyright (C) 2006-2007 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 "para.h"
+
+/* To get the mp4ff_tag_t and mp4ff_metadata_t typedefs. */
+#define USE_TAGGING
+#include <mp4ff.h>
-#include "server.cmdline.h"
-#include "server.h"
-#include "vss.h"
#include "error.h"
+#include "portable_io.h"
+#include "afh.h"
#include "string.h"
-#include "aac.h"
#include "fd.h"
-/** size of the input buffer, must be big enough to hold header */
-#define AAC_INBUF_SIZE 65536
-static FILE *infile;
-static unsigned char *inbuf;
-static size_t inbuf_len;
+struct aac_afh_context {
+ const void *map;
+ size_t mapsize;
+ size_t fpos;
+ int32_t track;
+ mp4ff_t *mp4ff;
+ mp4AudioSpecificConfig masc;
+ mp4ff_callback_t cb;
+};
+
+static uint32_t aac_afh_read_cb(void *user_data, void *dest, uint32_t want)
+{
+ struct aac_afh_context *c = user_data;
+ uint32_t have, rv;
+
+ if (want == 0 || c->fpos >= c->mapsize) {
+ PARA_INFO_LOG("failed attempt to read %u bytes @%zu\n", want,
+ c->fpos);
+ errno = EAGAIN;
+ return -1;
+ }
+ have = c->mapsize - c->fpos;
+ rv = PARA_MIN(have, want);
+ PARA_DEBUG_LOG("reading %u 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 uint32_t aac_afh_seek_cb(void *user_data, uint64_t pos)
{
- if (!infile)
- return;
- fclose(infile);
- infile = NULL;
+ struct aac_afh_context *c = user_data;
+ c->fpos = pos;
+ return 0;
}
-static int aac_find_stsz(unsigned char *buf, unsigned buflen, size_t *skip)
+static int32_t aac_afh_get_track(mp4ff_t *mp4ff, mp4AudioSpecificConfig *masc)
{
- int i;
+ int32_t i, rc, num_tracks = mp4ff_total_tracks(mp4ff);
- for (i = 0; i + 16 < buflen; i++) {
- unsigned char *p = buf + i;
- unsigned sample_count, sample_size;
+ assert(num_tracks >= 0);
+ for (i = 0; i < num_tracks; i++) {
+ unsigned char *buf = NULL;
+ unsigned buf_size = 0;
- 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;
+ mp4ff_get_decoder_config(mp4ff, i, &buf, &buf_size);
+ if (buf) {
+ rc = NeAACDecAudioSpecificConfig(buf, buf_size, masc);
+ free(buf);
+ if (rc < 0)
+ continue;
+ return i;
+ }
}
- PARA_WARNING_LOG("stsz not found, buflen: %d\n", buflen);
- return -E_STSZ;
+ return -1; /* no audio track */
}
-static int read_chunk_table(struct audio_format_info *afi, size_t skip)
+static int aac_afh_open(const void *map, size_t mapsize, void **afh_context)
{
- int ret, i;
- size_t sum = 0;
+ int ret;
+ struct aac_afh_context *c = para_malloc(sizeof(*c));
- for (;;) {
- ret = aac_find_stsz(inbuf, inbuf_len, &skip);
- if (ret >= 0)
- break;
- ret = read(fileno(infile), inbuf, AAC_INBUF_SIZE);
- if (ret <= 0)
- return -E_AAC_READ;
- inbuf_len = ret;
- PARA_INFO_LOG("next buffer: %d bytes\n", ret);
- }
- afi->chunks_total = ret;
- PARA_INFO_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++) {
- if (skip + 4 > inbuf_len) {
- skip = inbuf_len - skip;
- memmove(inbuf, inbuf + inbuf_len - skip, skip);
- ret = read(fileno(infile), inbuf + skip,
- AAC_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);
- afi->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]);
- }
- return 1;
+ 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;
+
+ ret = -E_MP4FF_OPEN;
+ c->mp4ff = mp4ff_open_read(&c->cb);
+ if (!c->mp4ff)
+ goto free_ctx;
+ c->track = aac_afh_get_track(c->mp4ff, &c->masc);
+ ret = -E_MP4FF_TRACK;
+ if (c->track < 0)
+ goto close_mp4ff;
+ *afh_context = c;
+ return 0;
+close_mp4ff:
+ mp4ff_close(c->mp4ff);
+free_ctx:
+ free(c);
+ *afh_context = NULL;
+ return ret;
+}
+
+static void aac_afh_close(void *afh_context)
+{
+ struct aac_afh_context *c = afh_context;
+ mp4ff_close(c->mp4ff);
+ free(c);
}
-static long unsigned aac_set_chunk_tv(struct audio_format_info *afi,
- mp4AudioSpecificConfig *mp4ASC)
+/**
+ * Libmp4ff function to reposition the file to the given sample.
+ *
+ * \param f The opaque handle returned by mp4ff_open_read().
+ * \param track The number of the (audio) track.
+ * \param sample Destination.
+ *
+ * We need this function to obtain the offset of the sample within the audio
+ * file. Unfortunately, it is not exposed in the mp4ff header.
+ *
+ * \return This function always returns 0.
+ */
+int32_t mp4ff_set_sample_position(mp4ff_t *f, const int32_t track, const int32_t sample);
+
+static int aac_afh_get_chunk(long unsigned chunk_num, void *afh_context,
+ const char **buf, size_t *len)
{
- float tmp = mp4ASC->sbr_present_flag == 1? 2047 : 1023,
- ms = 1000.0 * afi->chunks_total * tmp / mp4ASC->samplingFrequency;
- struct timeval total;
+ struct aac_afh_context *c = afh_context;
+ int32_t ss;
+ size_t offset;
- ms2tv(ms, &total);
- tv_divide(afi->chunks_total, &total, &afi->chunk_tv);
- PARA_INFO_LOG("%luHz, %fs (%lu x %lums)\n",
- mp4ASC->samplingFrequency, ms / 1000,
- afi->chunks_total, tv2ms(&afi->chunk_tv));
- return ms / 1000;
+ assert(chunk_num <= INT_MAX);
+ /* this function always returns zero */
+ mp4ff_set_sample_position(c->mp4ff, c->track, chunk_num);
+ offset = c->fpos;
+ ss = mp4ff_read_sample_getsize(c->mp4ff, c->track, chunk_num);
+ if (ss <= 0)
+ return -E_MP4FF_BAD_SAMPLE;
+ assert(ss + offset <= c->mapsize);
+ *buf = c->map + offset;
+ *len = ss;
+ return 1;
+}
+
+static void _aac_afh_get_taginfo(const mp4ff_t *mp4ff, struct taginfo *tags)
+{
+ mp4ff_meta_get_artist(mp4ff, &tags->artist);
+ mp4ff_meta_get_title(mp4ff, &tags->title);
+ mp4ff_meta_get_date(mp4ff, &tags->year);
+ mp4ff_meta_get_album(mp4ff, &tags->album);
+ mp4ff_meta_get_comment(mp4ff, &tags->comment);
}
/*
* Init m4a file and write some tech data to given pointers.
*/
-static int aac_get_file_info(FILE *file, struct audio_format_info *afi)
-{
- int i, ret, decoder_len;
- size_t skip;
- unsigned long rate = 0;
- unsigned char channels = 0;
- mp4AudioSpecificConfig mp4ASC;
- NeAACDecHandle handle;
-
- inbuf = para_malloc(AAC_INBUF_SIZE);
- infile = file;
-
- ret = read(fileno(infile), inbuf, AAC_INBUF_SIZE);
- if (ret <= 0) {
- ret = -E_AAC_READ;
- goto out;
- }
- inbuf_len = ret;
- ret = aac_find_esds(inbuf, inbuf_len, &skip);
+static int aac_get_file_info(char *map, size_t numbytes, __a_unused int fd,
+ struct afh_info *afhi)
+{
+ int ret;
+ int32_t rv;
+ struct aac_afh_context *c;
+ int64_t tmp;
+ const char *buf;
+ size_t sz;
+ uint32_t n;
+
+ ret = aac_afh_open(map, numbytes, (void **)&c);
if (ret < 0)
- goto out;
- decoder_len = ret;
- handle = aac_open();
- ret = NeAACDecInit(handle, inbuf + skip, decoder_len, &rate, &channels);
- if (ret < 0) {
- ret = -E_AACDEC_INIT;
- goto out;
+ return ret;
+
+ ret = -E_MP4FF_BAD_SAMPLERATE;
+ rv = mp4ff_get_sample_rate(c->mp4ff, c->track);
+ if (rv <= 0)
+ goto close;
+ afhi->frequency = rv;
+
+ ret = -E_MP4FF_BAD_CHANNEL_COUNT;
+ rv = mp4ff_get_channel_count(c->mp4ff, c->track);
+ if (rv <= 0)
+ goto close;
+ afhi->channels = rv;
+
+ ret = -E_MP4FF_BAD_SAMPLE_COUNT;
+ rv = mp4ff_num_samples(c->mp4ff, c->track);
+ if (rv <= 0)
+ goto close;
+ afhi->chunks_total = rv;
+ afhi->max_chunk_size = 0;
+ for (n = 0; n < afhi->chunks_total; n++) {
+ if (aac_afh_get_chunk(n, c, &buf, &sz) < 0)
+ break;
+ afhi->max_chunk_size = PARA_MAX((size_t)afhi->max_chunk_size, sz);
}
- skip += ret;
- PARA_INFO_LOG("rate: %lu, channels: %d\n", rate, channels);
- ret = -E_MP4ASC;
- if (NeAACDecAudioSpecificConfig(inbuf + skip, inbuf_len - skip,
- &mp4ASC) < 0)
- goto out;
- ret = read_chunk_table(afi, skip);
+
+ tmp = c->masc.sbr_present_flag == 1? 2048 : 1024;
+ afhi->seconds_total = tmp * afhi->chunks_total / afhi->frequency;
+ ms2tv(1000 * tmp / afhi->frequency, &afhi->chunk_tv);
+
+ if (aac_afh_get_chunk(0, c, &buf, &sz) >= 0)
+ numbytes -= buf - map;
+ afhi->bitrate = 8 * numbytes / afhi->seconds_total / 1000;
+ _aac_afh_get_taginfo(c->mp4ff, &afhi->tags);
+ ret = 1;
+close:
+ aac_afh_close(c);
+ return ret;
+}
+
+static uint32_t aac_afh_meta_read_cb(void *user_data, void *dest, uint32_t want)
+{
+ int fd = *(int *)user_data;
+ return read(fd, dest, want);
+}
+
+static uint32_t aac_afh_meta_seek_cb(void *user_data, uint64_t pos)
+{
+ int fd = *(int *)user_data;
+ return lseek(fd, pos, SEEK_SET);
+}
+
+static uint32_t aac_afh_meta_write_cb(void *user_data, void *dest, uint32_t want)
+{
+ int fd = *(int *)user_data;
+ return write(fd, dest, want);
+}
+
+static uint32_t 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_tag(mp4ff_tag_t *tag, const char *new_val, bool *found)
+{
+ free(tag->value);
+ tag->value = para_strdup(new_val);
+ *found = true;
+}
+
+static void add_tag(mp4ff_metadata_t *md, const char *item, const char *value)
+{
+ md->tags[md->count].item = para_strdup(item);
+ md->tags[md->count].value = para_strdup(value);
+ md->count++;
+}
+
+static int aac_afh_rewrite_tags(const char *map, size_t mapsize,
+ struct taginfo *tags, int fd, __a_unused const char *filename)
+{
+ int ret, i;
+ int32_t rv;
+ mp4ff_metadata_t metadata;
+ mp4ff_t *mp4ff;
+ mp4ff_callback_t 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
+ };
+ bool found_artist = false, found_title = false, found_album = false,
+ found_year = false, found_comment = false;
+
+ ret = write_all(fd, map, mapsize);
if (ret < 0)
- goto out;
- afi->seconds_total = aac_set_chunk_tv(afi, &mp4ASC);
- for (;;) {
- ret = aac_find_entry_point(inbuf, inbuf_len, &skip);
- if (ret >= 0)
- break;
- ret = read(fileno(infile), inbuf, AAC_INBUF_SIZE);
- if (ret <= 0) {
- ret = -E_AAC_READ;
- goto out;
- }
- inbuf_len = ret;
- PARA_INFO_LOG("next buffer: %d bytes\n", ret);
+ return ret;
+ lseek(fd, 0, SEEK_SET);
+
+ mp4ff = mp4ff_open_read_metaonly(&cb);
+ if (!mp4ff)
+ return -E_MP4FF_OPEN;
+
+ ret = -E_MP4FF_META_READ;
+ rv = mp4ff_meta_get_num_items(mp4ff);
+ if (rv < 0)
+ goto close;
+ metadata.count = rv;
+ PARA_NOTICE_LOG("%d metadata item(s) found\n", rv);
+
+ metadata.tags = para_malloc((metadata.count + 5) * sizeof(mp4ff_tag_t));
+ for (i = 0; i < metadata.count; i++) {
+ mp4ff_tag_t *tag = metadata.tags + i;
+
+ ret = -E_MP4FF_META_READ;
+ if (mp4ff_meta_get_by_index(mp4ff, i,
+ &tag->item, &tag->value) < 0)
+ goto free_tags;
+ PARA_INFO_LOG("found: %s: %s\n", tag->item, tag->value);
+ if (!strcmp(tag->item, "artist"))
+ replace_tag(tag, tags->artist, &found_artist);
+ else if (!strcmp(tag->item, "title"))
+ replace_tag(tag, tags->title, &found_title);
+ else if (!strcmp(tag->item, "album"))
+ replace_tag(tag, tags->album, &found_album);
+ else if (!strcmp(tag->item, "date"))
+ replace_tag(tag, tags->year, &found_year);
+ else if (!strcmp(tag->item, "comment"))
+ replace_tag(tag, tags->comment, &found_comment);
}
- afi->chunk_table[0] = ret;
- for (i = 1; i<= afi->chunks_total; i++)
- afi->chunk_table[i] += ret;
- sprintf(afi->info_string, "audio_file_info1:%lu x %lums\n"
- "audio_file_info2:\n"
- "audio_file_info3:\n",
- afi->chunks_total,
- tv2ms(&afi->chunk_tv));
- tv_scale(20, &afi->chunk_tv, &afi->eof_tv);
+ if (!found_artist)
+ add_tag(&metadata, "artist", tags->artist);
+ if (!found_title)
+ add_tag(&metadata, "title", tags->title);
+ if (!found_album)
+ add_tag(&metadata, "album", tags->album);
+ if (!found_year)
+ add_tag(&metadata, "date", tags->year);
+ if (!found_comment)
+ add_tag(&metadata, "comment", tags->comment);
+ ret = -E_MP4FF_META_WRITE;
+ if (mp4ff_meta_update(&cb, &metadata) < 0)
+ goto free_tags;
ret = 1;
-out:
- free(inbuf);
+free_tags:
+ for (; i > 0; i--) {
+ free(metadata.tags[i - 1].item);
+ free(metadata.tags[i - 1].value);
+ }
+ free(metadata.tags);
+close:
+ mp4ff_close(mp4ff);
return ret;
}
-static const char* aac_suffixes[] = {"m4a", "mp4", NULL};
-/** the init function of the aac audio format handler */
-void aac_afh_init(struct audio_format_handler *p)
+static const char * const aac_suffixes[] = {"m4a", "mp4", NULL};
+/**
+ * the init function of the aac audio format handler
+ *
+ * \param afh pointer to the struct to initialize
+ */
+void aac_afh_init(struct audio_format_handler *afh)
{
- p->get_file_info = aac_get_file_info,
- p->close_audio_file = aac_close_audio_file;
- p->suffixes = aac_suffixes;
+ afh->get_file_info = aac_get_file_info,
+ afh->suffixes = aac_suffixes;
+ afh->rewrite_tags = aac_afh_rewrite_tags;
+ afh->open = aac_afh_open;
+ afh->get_chunk = aac_afh_get_chunk;
+ afh->close = aac_afh_close;
}
projects / paraslash.git / blobdiff