/*
- * Copyright (C) 2006-2014 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>
*
* 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 <mp4v2/mp4v2.h>
#include "para.h"
+#include <mp4ff.h>
#include "error.h"
+#include "portable_io.h"
#include "afh.h"
#include "string.h"
#include "aac.h"
+#include "fd.h"
-static int aac_find_stsz(unsigned char *buf, size_t buflen, off_t *skip)
+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 uint32_t aac_afh_seek_cb(void *user_data, uint64_t pos)
+{
+ struct aac_afh_context *c = user_data;
+ c->fpos = pos;
+ return 0;
+}
+
+static int32_t aac_afh_get_track(mp4ff_t *mp4ff, mp4AudioSpecificConfig *masc)
+{
+ int32_t i, rc, num_tracks = mp4ff_total_tracks(mp4ff);
+
+ assert(num_tracks >= 0);
+ for (i = 0; i < num_tracks; i++) {
+ unsigned char *buf = NULL;
+ unsigned buf_size = 0;
+
+ 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;
+ }
+ }
+ return -1; /* no audio track */
+}
+
+static int aac_afh_open(const void *map, size_t mapsize, void **afh_context)
+{
+ int ret;
+ struct aac_afh_context *c = para_malloc(sizeof(*c));
+
+ 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);
+}
+
+/**
+ * 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)
+{
+ struct aac_afh_context *c = afh_context;
+ int32_t ss;
+ size_t offset;
+
+ 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 int aac_find_stsz(char *buf, size_t buflen, off_t *skip)
{
int i;
for (i = 0; i + 16 < buflen; i++) {
- unsigned char *p = buf + i;
+ char *p = buf + i;
unsigned sample_count, sample_size;
if (p[0] != 's' || p[1] != 't' || p[2] != 's' || p[3] != 'z')
continue;
PARA_DEBUG_LOG("found stsz@%d\n", i);
i += 8;
- sample_size = aac_read_int32(buf + i);
- PARA_DEBUG_LOG("sample size: %d\n", sample_size);
+ sample_size = read_u32_be(buf + i);
+ PARA_DEBUG_LOG("sample size: %u\n", sample_size);
i += 4;
- sample_count = aac_read_int32(buf + i);
+ sample_count = read_u32_be(buf + i);
i += 4;
- PARA_DEBUG_LOG("sample count: %d\n", sample_count);
+ PARA_DEBUG_LOG("sample count: %u\n", sample_count);
*skip = i;
return sample_count;
}
return -E_STSZ;
}
-static int atom_cmp(const unsigned char *buf1, const char *buf2)
+static int atom_cmp(const char *buf1, const char *buf2)
{
- const 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;
+ return memcmp(buf1, buf2, 4)? 1 : 0;
}
-static int read_atom_header(unsigned char *buf, uint64_t *subsize, unsigned char type[5])
+static int read_atom_header(char *buf, uint64_t *subsize, char type[5])
{
- int i;
- uint64_t size = (buf[0] << 24) + (buf[1] << 16) + (buf[2] << 8) + buf[3];
+ uint64_t size = read_u32_be(buf);
memcpy(type, buf + 4, 4);
type[4] = '\0';
}
buf += 4;
size = 0;
- for (i = 0; i < 8; i++)
- size |= ((uint64_t)buf[i]) << ((7 - i) * 8);
+ size = read_u64_be(buf);
*subsize = size;
return 16;
}
-static char *get_tag(unsigned char *p, int size)
+static char *get_tag(char *p, int size)
{
char *buf;
return buf;
}
-static void read_tags(unsigned char *buf, size_t buflen, struct afh_info *afhi)
+static void read_tags(char *buf, size_t buflen, struct afh_info *afhi)
{
- unsigned char *p = buf;
+ char *p = buf;
while (p + 32 < buf + buflen) {
- unsigned char *q, type1[5], type2[5];
+ char *q, type1[5], type2[5];
uint64_t size1, size2;
int ret, ret2;
}
}
-static void read_meta(unsigned char *buf, size_t buflen, struct afh_info *afhi)
+static void read_meta(char *buf, size_t buflen, struct afh_info *afhi)
{
- unsigned char *p = buf;
+ char *p = buf;
while (p + 4 < buf + buflen) {
}
}
-static void aac_get_taginfo(unsigned char *buf, size_t buflen,
- struct afh_info *afhi)
+static void aac_get_taginfo(char *buf, size_t buflen, struct afh_info *afhi)
{
int i;
uint64_t subsize;
- unsigned char type[5];
+ char type[5];
for (i = 0; i + 24 < buflen; i++) {
- unsigned char *p = buf + i;
+ 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);
}
static ssize_t aac_compute_chunk_table(struct afh_info *afhi,
- unsigned char *map, size_t numbytes)
+ char *map, size_t numbytes)
{
int ret, i;
size_t sum = 0;
if (ret < 0)
return ret;
afhi->chunks_total = ret;
- PARA_DEBUG_LOG("sz table has %lu entries\n", afhi->chunks_total);
+ PARA_DEBUG_LOG("sz table has %" PRIu32 " 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);
+ sum += read_u32_be(map + skip);
afhi->chunk_table[i] = sum;
skip += 4;
// if (i < 10 || i + 10 > afhi->chunks_total)
}
static int aac_set_chunk_tv(struct afh_info *afhi,
- mp4AudioSpecificConfig *mp4ASC, long unsigned *seconds)
+ mp4AudioSpecificConfig *mp4ASC, uint32_t *seconds)
{
float tmp = mp4ASC->sbr_present_flag == 1? 2047 : 1023;
struct timeval total;
long unsigned ms;
- if (!mp4ASC->samplingFrequency)
- return -E_MP4ASC;
ms = 1000.0 * afhi->chunks_total * tmp / mp4ASC->samplingFrequency;
ms2tv(ms, &total);
tv_divide(afhi->chunks_total, &total, &afhi->chunk_tv);
- PARA_INFO_LOG("%luHz, %lus (%lu x %lums)\n",
+ PARA_INFO_LOG("%luHz, %lus (%" PRIu32 " x %lums)\n",
mp4ASC->samplingFrequency, ms / 1000,
afhi->chunks_total, tv2ms(&afhi->chunk_tv));
if (ms < 1000)
unsigned char channels = 0;
mp4AudioSpecificConfig mp4ASC;
NeAACDecHandle handle = NULL;
- unsigned char *umap = (unsigned char *) map;
- ret = aac_find_esds(umap, numbytes, &skip, &decoder_len);
+ ret = aac_find_esds(map, numbytes, &skip, &decoder_len);
if (ret < 0)
goto out;
- aac_get_taginfo(umap, numbytes, afhi);
+ aac_get_taginfo(map, numbytes, afhi);
handle = aac_open();
ret = -E_AAC_AFH_INIT;
- if (NeAACDecInit(handle, umap + skip, decoder_len, &rate, &channels))
+ if (NeAACDecInit(handle, (unsigned char *)map + skip, decoder_len,
+ &rate, &channels))
goto out;
if (!channels)
goto out;
PARA_DEBUG_LOG("rate: %lu, channels: %d\n", rate, channels);
ret = -E_MP4ASC;
- if (NeAACDecAudioSpecificConfig(umap + skip, numbytes - skip, &mp4ASC))
+ if (NeAACDecAudioSpecificConfig((unsigned char *)map + skip,
+ numbytes - skip, &mp4ASC))
goto out;
if (!mp4ASC.samplingFrequency)
goto out;
- ret = aac_compute_chunk_table(afhi, umap, numbytes);
+ ret = aac_compute_chunk_table(afhi, map, numbytes);
if (ret < 0)
goto out;
skip = ret;
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);
+ ret = aac_find_entry_point(map + skip, numbytes - skip, &skip);
if (ret < 0)
goto out;
afhi->chunk_table[0] = ret;
for (i = 1; i<= afhi->chunks_total; i++)
afhi->chunk_table[i] += ret;
+ set_max_chunk_size(afhi);
afhi->channels = channels;
afhi->frequency = rate;
ret = (afhi->chunk_table[afhi->chunks_total] - afhi->chunk_table[0]) * 8; /* bits */
return ret;
}
-static const char* aac_suffixes[] = {"m4a", "mp4", NULL};
+static int aac_rewrite_tags(const char *map, size_t mapsize,
+ struct taginfo *tags, int fd, const char *filename)
+{
+ MP4FileHandle h;
+ const MP4Tags *mdata;
+ int ret = write_all(fd, map, mapsize);
+
+ if (ret < 0)
+ return ret;
+ lseek(fd, 0, SEEK_SET);
+ h = MP4Modify(filename, 0);
+ if (!h) {
+ PARA_ERROR_LOG("MP4Modify() failed, fd = %d\n", fd);
+ return -E_MP4V2;
+ }
+ mdata = MP4TagsAlloc();
+ assert(mdata);
+ if (!MP4TagsFetch(mdata, h)) {
+ PARA_ERROR_LOG("MP4Tags_Fetch() failed\n");
+ ret = -E_MP4V2;
+ goto close;
+ }
+
+ if (!MP4TagsSetAlbum(mdata, tags->album)) {
+ PARA_ERROR_LOG("Could not set album\n");
+ ret = -E_MP4V2;
+ goto tags_free;
+ }
+ if (!MP4TagsSetArtist(mdata, tags->artist)) {
+ PARA_ERROR_LOG("Could not set album\n");
+ ret = -E_MP4V2;
+ goto tags_free;
+ }
+ if (!MP4TagsSetComments(mdata, tags->comment)) {
+ PARA_ERROR_LOG("Could not set comment\n");
+ ret = -E_MP4V2;
+ goto tags_free;
+ }
+ if (!MP4TagsSetName(mdata, tags->title)) {
+ PARA_ERROR_LOG("Could not set title\n");
+ ret = -E_MP4V2;
+ goto tags_free;
+ }
+ if (!MP4TagsSetReleaseDate(mdata, tags->year)) {
+ PARA_ERROR_LOG("Could not set release date\n");
+ ret = -E_MP4V2;
+ goto tags_free;
+ }
+
+ if (!MP4TagsStore(mdata, h)) {
+ PARA_ERROR_LOG("Could not store tags\n");
+ ret = -E_MP4V2;
+ goto tags_free;
+ }
+ ret = 1;
+tags_free:
+ MP4TagsFree(mdata);
+close:
+ MP4Close(h, 0);
+ return ret;
+}
+
+static const char * const aac_suffixes[] = {"m4a", "mp4", NULL};
/**
* the init function of the aac audio format handler
*
{
afh->get_file_info = aac_get_file_info,
afh->suffixes = aac_suffixes;
+ afh->rewrite_tags = aac_rewrite_tags;
+ afh->open = aac_afh_open;
+ afh->get_chunk = aac_afh_get_chunk;
+ afh->close = aac_afh_close;
}
projects / paraslash.git / blobdiff