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/*
* Copyright 2008-2013 Various Authors
* Copyright 2006 dnk <dnk@bjum.net>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "ip.h"
#include "xmalloc.h"
#include "debug.h"
#include "id3.h"
#include "file.h"
#ifdef HAVE_CONFIG
#include "config/mp4.h"
#endif
#include "comment.h"
#include "aac.h"
#if USE_MPEG4IP
#include <mp4.h>
#else
#include <mp4v2/mp4v2.h>
#endif
#include <neaacdec.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <strings.h>
struct mp4_private {
char *overflow_buf;
int overflow_buf_len;
unsigned char channels;
unsigned long sample_rate;
NeAACDecHandle decoder; /* typedef void * */
struct {
MP4FileHandle handle; /* typedef void * */
MP4TrackId track;
MP4SampleId sample;
MP4SampleId num_samples;
} mp4;
struct {
unsigned long samples;
unsigned long bytes;
} current;
};
static MP4TrackId mp4_get_track(MP4FileHandle *handle)
{
MP4TrackId num_tracks;
const char *track_type;
uint8_t obj_type;
MP4TrackId i;
num_tracks = MP4GetNumberOfTracks(handle, NULL, 0);
for (i = 1; i <= num_tracks; i++) {
track_type = MP4GetTrackType(handle, i);
if (!track_type)
continue;
if (!MP4_IS_AUDIO_TRACK_TYPE(track_type))
continue;
/* MP4GetTrackAudioType */
obj_type = MP4GetTrackEsdsObjectTypeId(handle, i);
if (obj_type == MP4_INVALID_AUDIO_TYPE)
continue;
if (obj_type == MP4_MPEG4_AUDIO_TYPE) {
obj_type = MP4GetTrackAudioMpeg4Type(handle, i);
if (MP4_IS_MPEG4_AAC_AUDIO_TYPE(obj_type))
return i;
} else {
if (MP4_IS_AAC_AUDIO_TYPE(obj_type))
return i;
}
}
return MP4_INVALID_TRACK_ID;
}
static void mp4_get_channel_map(struct input_plugin_data *ip_data)
{
struct mp4_private *priv = ip_data->private;
unsigned char *aac_data = NULL;
unsigned int aac_data_len = 0;
NeAACDecFrameInfo frame_info;
int i;
ip_data->channel_map[0] = CHANNEL_POSITION_INVALID;
if (MP4ReadSample(priv->mp4.handle, priv->mp4.track, priv->mp4.sample,
&aac_data, &aac_data_len, NULL, NULL, NULL, NULL) == 0)
return;
if (!aac_data)
return;
NeAACDecDecode(priv->decoder, &frame_info, aac_data, aac_data_len);
free(aac_data);
if (frame_info.error != 0 || frame_info.bytesconsumed <= 0
|| frame_info.channels > CHANNELS_MAX)
return;
for (i = 0; i < frame_info.channels; i++)
ip_data->channel_map[i] = channel_position_aac(frame_info.channel_position[i]);
}
static void mp4_close_handle(MP4FileHandle handle)
{
#ifdef MP4_CLOSE_DO_NOT_COMPUTE_BITRATE
MP4Close(handle, 0);
#else
MP4Close(handle);
#endif
}
static int mp4_open(struct input_plugin_data *ip_data)
{
struct mp4_private *priv;
NeAACDecConfigurationPtr neaac_cfg;
unsigned char *buf;
unsigned int buf_size;
int rc = -IP_ERROR_FILE_FORMAT;
const struct mp4_private priv_init = {
.decoder = NULL
};
/* http://sourceforge.net/forum/message.php?msg_id=3578887 */
if (ip_data->remote)
return -IP_ERROR_FUNCTION_NOT_SUPPORTED;
/* kindly ask mp4v2 to not spam stderr */
MP4LogSetLevel(MP4_LOG_NONE);
/* init private struct */
priv = xnew(struct mp4_private, 1);
*priv = priv_init;
ip_data->private = priv;
priv->decoder = NeAACDecOpen();
/* set decoder config */
neaac_cfg = NeAACDecGetCurrentConfiguration(priv->decoder);
neaac_cfg->outputFormat = FAAD_FMT_16BIT; /* force 16 bit audio */
neaac_cfg->downMatrix = 0; /* NOT 5.1 -> stereo */
NeAACDecSetConfiguration(priv->decoder, neaac_cfg);
/* open mpeg-4 file */
#ifdef MP4_DETAILS_ALL
priv->mp4.handle = MP4Read(ip_data->filename, 0);
#else
priv->mp4.handle = MP4Read(ip_data->filename);
#endif
if (!priv->mp4.handle) {
d_print("MP4Read failed\n");
goto out;
}
/* find aac audio track */
priv->mp4.track = mp4_get_track(priv->mp4.handle);
if (priv->mp4.track == MP4_INVALID_TRACK_ID) {
d_print("MP4FindTrackId failed\n");
if (MP4GetNumberOfTracks(priv->mp4.handle, MP4_AUDIO_TRACK_TYPE, 0) > 0)
rc = -IP_ERROR_UNSUPPORTED_FILE_TYPE;
goto out;
}
priv->mp4.num_samples = MP4GetTrackNumberOfSamples(priv->mp4.handle, priv->mp4.track);
priv->mp4.sample = 1;
buf = NULL;
buf_size = 0;
if (!MP4GetTrackESConfiguration(priv->mp4.handle, priv->mp4.track, &buf, &buf_size)) {
/* failed to get mpeg-4 audio config... this is ok.
* NeAACDecInit2() will simply use default values instead.
*/
buf = NULL;
buf_size = 0;
}
/* init decoder according to mpeg-4 audio config */
if (NeAACDecInit2(priv->decoder, buf, buf_size, &priv->sample_rate, &priv->channels) < 0) {
free(buf);
goto out;
}
free(buf);
d_print("sample rate %luhz, channels %u\n", priv->sample_rate, priv->channels);
ip_data->sf = sf_rate(priv->sample_rate) | sf_channels(priv->channels) | sf_bits(16) | sf_signed(1);
#if defined(WORDS_BIGENDIAN)
ip_data->sf |= sf_bigendian(1);
#endif
mp4_get_channel_map(ip_data);
return 0;
out:
if (priv->mp4.handle)
mp4_close_handle(priv->mp4.handle);
if (priv->decoder)
NeAACDecClose(priv->decoder);
free(priv);
return rc;
}
static int mp4_close(struct input_plugin_data *ip_data)
{
struct mp4_private *priv;
priv = ip_data->private;
if (priv->mp4.handle)
mp4_close_handle(priv->mp4.handle);
if (priv->decoder)
NeAACDecClose(priv->decoder);
free(priv);
ip_data->private = NULL;
return 0;
}
/* returns -1 on fatal errors
* returns -2 on non-fatal errors
* 0 on eof
* number of bytes put in 'buffer' on success */
static int decode_one_frame(struct input_plugin_data *ip_data, void *buffer, int count)
{
struct mp4_private *priv;
unsigned char *aac_data = NULL;
unsigned int aac_data_len = 0;
NeAACDecFrameInfo frame_info;
char *sample_buf;
int bytes;
priv = ip_data->private;
BUG_ON(priv->overflow_buf_len);
if (priv->mp4.sample > priv->mp4.num_samples)
return 0; /* EOF */
if (MP4ReadSample(priv->mp4.handle, priv->mp4.track, priv->mp4.sample,
&aac_data, &aac_data_len, NULL, NULL, NULL, NULL) == 0) {
d_print("error reading mp4 sample %d\n", priv->mp4.sample);
errno = EINVAL;
return -1;
}
priv->mp4.sample++;
if (!aac_data) {
d_print("aac_data == NULL\n");
errno = EINVAL;
return -1;
}
sample_buf = NeAACDecDecode(priv->decoder, &frame_info, aac_data, aac_data_len);
if (frame_info.error == 0 && frame_info.samples > 0) {
priv->current.samples += frame_info.samples;
priv->current.bytes += frame_info.bytesconsumed;
}
free(aac_data);
if (!sample_buf || frame_info.bytesconsumed <= 0) {
d_print("fatal error: %s\n", NeAACDecGetErrorMessage(frame_info.error));
errno = EINVAL;
return -1;
}
if (frame_info.error != 0) {
d_print("frame error: %s\n", NeAACDecGetErrorMessage(frame_info.error));
return -2;
}
if (frame_info.samples <= 0)
return -2;
if (frame_info.channels != priv->channels || frame_info.samplerate != priv->sample_rate) {
d_print("invalid channel or sample_rate count\n");
return -2;
}
/* 16-bit samples */
bytes = frame_info.samples * 2;
if (bytes > count) {
/* decoded too much; keep overflow. */
priv->overflow_buf = sample_buf + count;
priv->overflow_buf_len = bytes - count;
memcpy(buffer, sample_buf, count);
return count;
} else {
memcpy(buffer, sample_buf, bytes);
}
return bytes;
}
static int mp4_read(struct input_plugin_data *ip_data, char *buffer, int count)
{
struct mp4_private *priv;
int rc;
priv = ip_data->private;
/* use overflow from previous call (if any) */
if (priv->overflow_buf_len > 0) {
int len = priv->overflow_buf_len;
if (len > count)
len = count;
memcpy(buffer, priv->overflow_buf, len);
priv->overflow_buf += len;
priv->overflow_buf_len -= len;
return len;
}
do {
rc = decode_one_frame(ip_data, buffer, count);
} while (rc == -2);
return rc;
}
static int mp4_seek(struct input_plugin_data *ip_data, double offset)
{
struct mp4_private *priv;
MP4SampleId sample;
uint32_t scale;
priv = ip_data->private;
scale = MP4GetTrackTimeScale(priv->mp4.handle, priv->mp4.track);
if (scale == 0)
return -IP_ERROR_INTERNAL;
sample = MP4GetSampleIdFromTime(priv->mp4.handle, priv->mp4.track,
(MP4Timestamp)(offset * (double)scale), 0);
if (sample == MP4_INVALID_SAMPLE_ID)
return -IP_ERROR_INTERNAL;
priv->mp4.sample = sample;
d_print("seeking to sample %d\n", sample);
return 0;
}
static int mp4_read_comments(struct input_plugin_data *ip_data,
struct keyval **comments)
{
struct mp4_private *priv;
#if USE_MPEG4IP
uint16_t meta_num, meta_total;
uint8_t val;
char *str;
/*uint8_t *ustr;
uint32_t size;*/
#else
const MP4Tags *tags;
MP4ItmfItemList* itmf_list;
#endif
GROWING_KEYVALS(c);
priv = ip_data->private;
#if USE_MPEG4IP
/* MP4GetMetadata* provides malloced pointers, and the data
* is in UTF-8 (or at least it should be). */
if (MP4GetMetadataArtist(priv->mp4.handle, &str))
comments_add(&c, "artist", str);
if (MP4GetMetadataAlbum(priv->mp4.handle, &str))
comments_add(&c, "album", str);
if (MP4GetMetadataName(priv->mp4.handle, &str))
comments_add(&c, "title", str);
if (MP4GetMetadataGenre(priv->mp4.handle, &str))
comments_add(&c, "genre", str);
if (MP4GetMetadataYear(priv->mp4.handle, &str))
comments_add(&c, "date", str);
if (MP4GetMetadataCompilation(priv->mp4.handle, &val))
comments_add_const(&c, "compilation", val ? "yes" : "no");
#if 0
if (MP4GetBytesProperty(priv->mp4.handle, "moov.udta.meta.ilst.aART.data", &ustr, &size)) {
char *xstr;
/* What's this?
* This is the result from lack of documentation.
* It's supposed to return just a string, but it
* returns an additional 16 bytes of junk at the
* beginning. Could be a bug. Could be intentional.
* Hopefully this works around it:
*/
if (ustr[0] == 0 && size > 16) {
ustr += 16;
size -= 16;
}
xstr = xnew(char, size + 1);
memcpy(xstr, ustr, size);
xstr[size] = 0;
comments_add(&c, "albumartist", xstr);
free(xstr);
}
#endif
if (MP4GetMetadataTrack(priv->mp4.handle, &meta_num, &meta_total)) {
char buf[6];
snprintf(buf, 6, "%u", meta_num);
comments_add_const(&c, "tracknumber", buf);
}
if (MP4GetMetadataDisk(priv->mp4.handle, &meta_num, &meta_total)) {
char buf[6];
snprintf(buf, 6, "%u", meta_num);
comments_add_const(&c, "discnumber", buf);
}
#else /* !USE_MPEG4IP, new interface */
tags = MP4TagsAlloc();
MP4TagsFetch(tags, priv->mp4.handle);
if (tags->artist)
comments_add_const(&c, "artist", tags->artist);
if (tags->albumArtist)
comments_add_const(&c, "albumartist", tags->albumArtist);
if (tags->sortArtist)
comments_add_const(&c, "artistsort", tags->sortArtist);
if (tags->sortAlbumArtist)
comments_add_const(&c, "albumartistsort", tags->sortAlbumArtist);
if (tags->sortAlbum)
comments_add_const(&c, "albumsort", tags->sortAlbum);
if (tags->album)
comments_add_const(&c, "album", tags->album);
if (tags->name)
comments_add_const(&c, "title", tags->name);
if (tags->genre) {
comments_add_const(&c, "genre", tags->genre);
} else if (tags->genreType) {
char const *genre = id3_get_genre(*tags->genreType - 1);
if (genre)
comments_add_const(&c, "genre", genre);
}
if (tags->releaseDate && strcmp(tags->releaseDate, "0") != 0)
comments_add_const(&c, "date", tags->releaseDate);
if (tags->compilation)
comments_add_const(&c, "compilation", *tags->compilation ? "yes" : "no");
if (tags->track) {
char buf[6];
snprintf(buf, 6, "%u", tags->track->index);
comments_add_const(&c, "tracknumber", buf);
}
if (tags->disk) {
char buf[6];
snprintf(buf, 6, "%u", tags->disk->index);
comments_add_const(&c, "discnumber", buf);
}
MP4TagsFree(tags);
itmf_list = MP4ItmfGetItemsByMeaning(priv->mp4.handle, "com.apple.iTunes", NULL);
if (itmf_list) {
int i;
for (i = 0; i < itmf_list->size; i++) {
MP4ItmfItem* item = &itmf_list->elements[i];
if (item->dataList.size < 1)
continue;
if (item->dataList.size > 1)
d_print("ignore multiple values for tag %s\n", item->name);
else {
MP4ItmfData* data = &item->dataList.elements[0];
char *val = xstrndup(data->value, data->valueSize);
comments_add(&c, item->name, val);
}
}
MP4ItmfItemListFree(itmf_list);
}
#endif
keyvals_terminate(&c);
*comments = c.keyvals;
return 0;
}
static int mp4_duration(struct input_plugin_data *ip_data)
{
struct mp4_private *priv;
uint32_t scale;
uint64_t duration;
priv = ip_data->private;
scale = MP4GetTrackTimeScale(priv->mp4.handle, priv->mp4.track);
if (scale == 0)
return 0;
duration = MP4GetTrackDuration(priv->mp4.handle, priv->mp4.track);
return duration / scale;
}
static long mp4_bitrate(struct input_plugin_data *ip_data)
{
struct mp4_private *priv = ip_data->private;
long bitrate = MP4GetTrackBitRate(priv->mp4.handle, priv->mp4.track);
return bitrate ? bitrate : -IP_ERROR_FUNCTION_NOT_SUPPORTED;
}
static long mp4_current_bitrate(struct input_plugin_data *ip_data)
{
struct mp4_private *priv = ip_data->private;
long bitrate = -1;
if (priv->current.samples > 0) {
priv->current.samples /= priv->channels;
bitrate = (8 * priv->current.bytes * priv->sample_rate) / priv->current.samples;
priv->current.samples = 0;
priv->current.bytes = 0;
}
return bitrate;
}
static char *mp4_codec(struct input_plugin_data *ip_data)
{
return xstrdup("aac");
}
static const char *object_type_to_str(uint8_t obj_type)
{
switch (obj_type) {
case MP4_MPEG4_AAC_MAIN_AUDIO_TYPE: return "Main";
case MP4_MPEG4_AAC_LC_AUDIO_TYPE: return "LC";
case MP4_MPEG4_AAC_SSR_AUDIO_TYPE: return "SSR";
case MP4_MPEG4_AAC_LTP_AUDIO_TYPE: return "LTP";
#ifdef MP4_MPEG4_AAC_HE_AUDIO_TYPE
case MP4_MPEG4_AAC_HE_AUDIO_TYPE: return "HE";
#endif
case MP4_MPEG4_AAC_SCALABLE_AUDIO_TYPE: return "Scalable";
}
return NULL;
}
static char *mp4_codec_profile(struct input_plugin_data *ip_data)
{
struct mp4_private *priv = ip_data->private;
const char *profile;
uint8_t obj_type;
obj_type = MP4GetTrackEsdsObjectTypeId(priv->mp4.handle, priv->mp4.track);
if (obj_type == MP4_MPEG4_AUDIO_TYPE)
obj_type = MP4GetTrackAudioMpeg4Type(priv->mp4.handle, priv->mp4.track);
profile = object_type_to_str(obj_type);
return profile ? xstrdup(profile) : NULL;
}
const struct input_plugin_ops ip_ops = {
.open = mp4_open,
.close = mp4_close,
.read = mp4_read,
.seek = mp4_seek,
.read_comments = mp4_read_comments,
.duration = mp4_duration,
.bitrate = mp4_bitrate,
.bitrate_current = mp4_current_bitrate,
.codec = mp4_codec,
.codec_profile = mp4_codec_profile
};
const int ip_priority = 50;
const char * const ip_extensions[] = { "mp4", "m4a", "m4b", NULL };
const char * const ip_mime_types[] = { /*"audio/mp4", "audio/mp4a-latm",*/ NULL };
const char * const ip_options[] = { NULL };
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