mpd/src/inputPlugins/mp4_plugin.c

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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.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 02111-1307 USA
*/
#include "../decoder_api.h"
#ifdef HAVE_FAAD
#include "../utils.h"
#include "../log.h"
#include "../mp4ff/mp4ff.h"
#include <faad.h>
/* all code here is either based on or copied from FAAD2's frontend code */
static int mp4_getAACTrack(mp4ff_t * infile)
{
/* find AAC track */
int i, rc;
int numTracks = mp4ff_total_tracks(infile);
for (i = 0; i < numTracks; i++) {
unsigned char *buff = NULL;
unsigned int buff_size = 0;
#ifdef HAVE_MP4AUDIOSPECIFICCONFIG
mp4AudioSpecificConfig mp4ASC;
#else
unsigned long dummy1_32;
unsigned char dummy2_8, dummy3_8, dummy4_8, dummy5_8, dummy6_8,
dummy7_8, dummy8_8;
#endif
mp4ff_get_decoder_config(infile, i, &buff, &buff_size);
if (buff) {
#ifdef HAVE_MP4AUDIOSPECIFICCONFIG
rc = AudioSpecificConfig(buff, buff_size, &mp4ASC);
#else
rc = AudioSpecificConfig(buff, &dummy1_32, &dummy2_8,
&dummy3_8, &dummy4_8,
&dummy5_8, &dummy6_8,
&dummy7_8, &dummy8_8);
#endif
free(buff);
if (rc < 0)
continue;
return i;
}
}
/* can't decode this */
return -1;
}
static uint32_t mp4_inputStreamReadCallback(void *inStream, void *buffer,
uint32_t length)
{
return readFromInputStream((InputStream *) inStream, buffer, 1, length);
}
static uint32_t mp4_inputStreamSeekCallback(void *inStream, uint64_t position)
{
return seekInputStream((InputStream *) inStream, position, SEEK_SET);
}
static int mp4_decode(struct decoder * mpd_decoder, InputStream * inStream)
{
mp4ff_t *mp4fh;
mp4ff_callback_t *mp4cb;
int32_t track;
float file_time;
int32_t scale;
faacDecHandle decoder;
faacDecFrameInfo frameInfo;
faacDecConfigurationPtr config;
unsigned char *mp4Buffer;
unsigned int mp4BufferSize;
uint32_t sampleRate;
unsigned char channels;
long sampleId;
long numSamples;
int eof = 0;
long dur;
unsigned int sampleCount;
char *sampleBuffer;
size_t sampleBufferLen;
unsigned int initial = 1;
float *seekTable;
long seekTableEnd = -1;
int seekPositionFound = 0;
long offset;
mpd_uint16 bitRate = 0;
int seeking = 0;
mp4cb = xmalloc(sizeof(mp4ff_callback_t));
mp4cb->read = mp4_inputStreamReadCallback;
mp4cb->seek = mp4_inputStreamSeekCallback;
mp4cb->user_data = inStream;
mp4fh = mp4ff_open_read(mp4cb);
if (!mp4fh) {
ERROR("Input does not appear to be a mp4 stream.\n");
free(mp4cb);
return -1;
}
track = mp4_getAACTrack(mp4fh);
if (track < 0) {
ERROR("No AAC track found in mp4 stream.\n");
mp4ff_close(mp4fh);
free(mp4cb);
return -1;
}
decoder = faacDecOpen();
config = faacDecGetCurrentConfiguration(decoder);
config->outputFormat = FAAD_FMT_16BIT;
#ifdef HAVE_FAACDECCONFIGURATION_DOWNMATRIX
config->downMatrix = 1;
#endif
#ifdef HAVE_FAACDECCONFIGURATION_DONTUPSAMPLEIMPLICITSBR
config->dontUpSampleImplicitSBR = 0;
#endif
faacDecSetConfiguration(decoder, config);
dc.audioFormat.bits = 16;
mp4Buffer = NULL;
mp4BufferSize = 0;
mp4ff_get_decoder_config(mp4fh, track, &mp4Buffer, &mp4BufferSize);
if (faacDecInit2
(decoder, mp4Buffer, mp4BufferSize, &sampleRate, &channels) < 0) {
ERROR("Error not a AAC stream.\n");
faacDecClose(decoder);
mp4ff_close(mp4fh);
free(mp4cb);
return -1;
}
dc.audioFormat.sampleRate = sampleRate;
dc.audioFormat.channels = channels;
file_time = mp4ff_get_track_duration_use_offsets(mp4fh, track);
scale = mp4ff_time_scale(mp4fh, track);
if (mp4Buffer)
free(mp4Buffer);
if (scale < 0) {
ERROR("Error getting audio format of mp4 AAC track.\n");
faacDecClose(decoder);
mp4ff_close(mp4fh);
free(mp4cb);
return -1;
}
dc.totalTime = ((float)file_time) / scale;
numSamples = mp4ff_num_samples(mp4fh, track);
file_time = 0.0;
seekTable = xmalloc(sizeof(float) * numSamples);
for (sampleId = 0; sampleId < numSamples && !eof; sampleId++) {
if (dc.command == DECODE_COMMAND_SEEK)
seeking = 1;
if (seeking && seekTableEnd > 1 &&
seekTable[seekTableEnd] >= dc.seekWhere) {
int i = 2;
while (seekTable[i] < dc.seekWhere)
i++;
sampleId = i - 1;
file_time = seekTable[sampleId];
}
dur = mp4ff_get_sample_duration(mp4fh, track, sampleId);
offset = mp4ff_get_sample_offset(mp4fh, track, sampleId);
if (sampleId > seekTableEnd) {
seekTable[sampleId] = file_time;
seekTableEnd = sampleId;
}
if (sampleId == 0)
dur = 0;
if (offset > dur)
dur = 0;
else
dur -= offset;
file_time += ((float)dur) / scale;
if (seeking && file_time > dc.seekWhere)
seekPositionFound = 1;
if (seeking && seekPositionFound) {
seekPositionFound = 0;
ob_clear();
seeking = 0;
dc_command_finished();
}
if (seeking)
continue;
if (mp4ff_read_sample(mp4fh, track, sampleId, &mp4Buffer,
&mp4BufferSize) == 0) {
eof = 1;
continue;
}
#ifdef HAVE_FAAD_BUFLEN_FUNCS
sampleBuffer = faacDecDecode(decoder, &frameInfo, mp4Buffer,
mp4BufferSize);
#else
sampleBuffer = faacDecDecode(decoder, &frameInfo, mp4Buffer);
#endif
if (mp4Buffer)
free(mp4Buffer);
if (frameInfo.error > 0) {
ERROR("faad2 error: %s\n",
faacDecGetErrorMessage(frameInfo.error));
eof = 1;
break;
}
if (dc.state != DECODE_STATE_DECODE) {
channels = frameInfo.channels;
#ifdef HAVE_FAACDECFRAMEINFO_SAMPLERATE
scale = frameInfo.samplerate;
#endif
dc.audioFormat.sampleRate = scale;
dc.audioFormat.channels = frameInfo.channels;
getOutputAudioFormat(&(dc.audioFormat),
&(ob.audioFormat));
decoder_initialized(mpd_decoder);
}
if (channels * (unsigned long)(dur + offset) > frameInfo.samples) {
dur = frameInfo.samples / channels;
offset = 0;
}
sampleCount = (unsigned long)(dur * channels);
if (sampleCount > 0) {
initial = 0;
bitRate = frameInfo.bytesconsumed * 8.0 *
frameInfo.channels * scale /
frameInfo.samples / 1000 + 0.5;
}
sampleBufferLen = sampleCount * 2;
sampleBuffer += offset * channels * 2;
ob_send(inStream, 1, sampleBuffer,
sampleBufferLen, file_time,
bitRate, NULL);
if (dc.command == DECODE_COMMAND_STOP) {
eof = 1;
break;
}
}
free(seekTable);
faacDecClose(decoder);
mp4ff_close(mp4fh);
free(mp4cb);
if (dc.state != DECODE_STATE_DECODE)
return -1;
if (dc.command == DECODE_COMMAND_SEEK && seeking) {
ob_clear();
dc_command_finished();
}
ob_flush();
return 0;
}
static MpdTag *mp4DataDup(char *file, int *mp4MetadataFound)
{
MpdTag *ret = NULL;
InputStream inStream;
mp4ff_t *mp4fh;
mp4ff_callback_t *callback;
int32_t track;
int32_t file_time;
int32_t scale;
int i;
*mp4MetadataFound = 0;
if (openInputStream(&inStream, file) < 0) {
DEBUG("mp4DataDup: Failed to open file: %s\n", file);
return NULL;
}
callback = xmalloc(sizeof(mp4ff_callback_t));
callback->read = mp4_inputStreamReadCallback;
callback->seek = mp4_inputStreamSeekCallback;
callback->user_data = &inStream;
mp4fh = mp4ff_open_read(callback);
if (!mp4fh) {
free(callback);
closeInputStream(&inStream);
return NULL;
}
track = mp4_getAACTrack(mp4fh);
if (track < 0) {
mp4ff_close(mp4fh);
closeInputStream(&inStream);
free(callback);
return NULL;
}
ret = newMpdTag();
file_time = mp4ff_get_track_duration_use_offsets(mp4fh, track);
scale = mp4ff_time_scale(mp4fh, track);
if (scale < 0) {
mp4ff_close(mp4fh);
closeInputStream(&inStream);
free(callback);
freeMpdTag(ret);
return NULL;
}
ret->time = ((float)file_time) / scale + 0.5;
for (i = 0; i < mp4ff_meta_get_num_items(mp4fh); i++) {
char *item;
char *value;
mp4ff_meta_get_by_index(mp4fh, i, &item, &value);
if (0 == strcasecmp("artist", item)) {
addItemToMpdTag(ret, TAG_ITEM_ARTIST, value);
*mp4MetadataFound = 1;
} else if (0 == strcasecmp("title", item)) {
addItemToMpdTag(ret, TAG_ITEM_TITLE, value);
*mp4MetadataFound = 1;
} else if (0 == strcasecmp("album", item)) {
addItemToMpdTag(ret, TAG_ITEM_ALBUM, value);
*mp4MetadataFound = 1;
} else if (0 == strcasecmp("track", item)) {
addItemToMpdTag(ret, TAG_ITEM_TRACK, value);
*mp4MetadataFound = 1;
} else if (0 == strcasecmp("disc", item)) { /* Is that the correct id? */
addItemToMpdTag(ret, TAG_ITEM_DISC, value);
*mp4MetadataFound = 1;
} else if (0 == strcasecmp("genre", item)) {
addItemToMpdTag(ret, TAG_ITEM_GENRE, value);
*mp4MetadataFound = 1;
} else if (0 == strcasecmp("date", item)) {
addItemToMpdTag(ret, TAG_ITEM_DATE, value);
*mp4MetadataFound = 1;
}
free(item);
free(value);
}
mp4ff_close(mp4fh);
closeInputStream(&inStream);
return ret;
}
static MpdTag *mp4TagDup(char *file)
{
MpdTag *ret = NULL;
int mp4MetadataFound = 0;
ret = mp4DataDup(file, &mp4MetadataFound);
if (!ret)
return NULL;
if (!mp4MetadataFound) {
MpdTag *temp = id3Dup(file);
if (temp) {
temp->time = ret->time;
freeMpdTag(ret);
ret = temp;
}
}
return ret;
}
static const char *mp4_suffixes[] = { "m4a", "mp4", NULL };
static const char *mp4_mimeTypes[] = { "audio/mp4", "audio/m4a", NULL };
InputPlugin mp4Plugin = {
"mp4",
NULL,
NULL,
NULL,
mp4_decode,
NULL,
mp4TagDup,
INPUT_PLUGIN_STREAM_FILE | INPUT_PLUGIN_STREAM_URL,
mp4_suffixes,
mp4_mimeTypes
};
#else
InputPlugin mp4Plugin;
#endif /* HAVE_FAAD */