ref: 3254623f0745837118e0d5d739fa6c402fd5b9d3
dir: /plugins/foo_mp4/foo_mp4.cpp/
/*
** FAAD - Freeware Advanced Audio Decoder
** Copyright (C) 2002-2003 M. Bakker
**
** 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.
**
** $Id: foo_mp4.cpp,v 1.36 2003/07/01 21:26:32 menno Exp $
**/
#include <mp4.h>
#include <faad.h>
#include "pfc/pfc.h"
#include "foobar2000/SDK/input.h"
#include "foobar2000/SDK/console.h"
#include "foobar2000/SDK/componentversion.h"
#include "foobar2000/SDK/tagread.h"
//#define DBG_OUT(A) OutputDebugString(A)
#define DBG_OUT(A)
#if 0
char *STRIP_REVISION(const char *str)
{
char *tmp = strchr(str, ' ');
int len = lstrlen(tmp)-2;
if (len > 0 && tmp)
tmp[len] = '\0';
else
tmp = "000";
return tmp;
}
#endif
DECLARE_COMPONENT_VERSION ("MPEG-4 AAC decoder",
"$Revision: 1.36 $",
"Based on FAAD2 v" FAAD2_VERSION "\nCopyright (C) 2002-2003 http://www.audiocoding.com" );
class input_mp4 : public input
{
public:
virtual int test_filename(const char * fn,const char * ext)
{
return (!stricmp(ext,"MP4") || !stricmp(ext,"M4A"));
}
virtual int open(reader *r, file_info *info, int full_open)
{
unsigned __int8 *buffer;
unsigned __int32 buffer_size;
unsigned __int8 channels;
unsigned __int32 samplerate;
faacDecConfigurationPtr config;
mp4AudioSpecificConfig mp4ASC;
m_reader = r;
if (!m_reader->can_seek())
{
console::error("MP4 file needs seeking.", "foo_mp4");
return 0;
}
hDecoder = faacDecOpen();
if (!hDecoder)
{
console::error("Failed to open FAAD2 library.", "foo_mp4");
return 0;
}
config = faacDecGetCurrentConfiguration(hDecoder);
config->outputFormat = FAAD_FMT_DOUBLE;
faacDecSetConfiguration(hDecoder, config);
hFile = MP4ReadCb(0, open_cb, close_cb, read_cb, write_cb,
setpos_cb, getpos_cb, filesize_cb, (void*)m_reader);
if (hFile == MP4_INVALID_FILE_HANDLE)
{
console::error("Failed to open MP4 file.", "foo_mp4");
return 0;
}
track = GetAACTrack(hFile);
if (track < 1)
{
console::error("No valid AAC track found.", "foo_mp4");
return 0;
}
buffer = NULL;
buffer_size = 0;
MP4GetTrackESConfiguration(hFile, track, &buffer, &buffer_size);
if (!buffer)
{
console::error("Unable to read track specific configuration.", "foo_mp4");
return 0;
}
AudioSpecificConfig((unsigned char*)buffer, buffer_size, &mp4ASC);
int rc = faacDecInit2(hDecoder, (unsigned char*)buffer, buffer_size,
(unsigned long*)&samplerate, (unsigned char*)&channels);
if (buffer) free(buffer);
if (rc < 0)
{
console::error("Unable to initialise FAAD2 library.", "foo_mp4");
return 0;
}
numSamples = MP4GetTrackNumberOfSamples(hFile, track);
sampleId = 1;
unsigned __int64 length = MP4GetTrackDuration(hFile, track);
__int64 msDuration = MP4ConvertFromTrackDuration(hFile, track,
length, MP4_MSECS_TIME_SCALE);
info->set_length((double)msDuration/1000.0);
info->info_set_int("bitrate",(__int64)(1.0/1000.0 *
(double)(__int64)MP4GetTrackIntegerProperty(hFile,
track, "mdia.minf.stbl.stsd.mp4a.esds.decConfigDescr.avgBitrate")) + 0.5);
info->info_set_int("channels", (__int64)channels);
info->info_set_int("samplerate", (__int64)samplerate);
#if 0
if (mp4ASC.sbr_present_flag)
info->info_set("codec", "AAC+SBR");
else
#endif
info->info_set("codec", "AAC");
ReadMP4Tag(info);
return 1;
}
input_mp4()
{
hFile = MP4_INVALID_FILE_HANDLE;
hDecoder = NULL;
}
~input_mp4()
{
if (hFile != MP4_INVALID_FILE_HANDLE)
MP4Close(hFile);
if (hDecoder)
faacDecClose(hDecoder);
}
virtual int run(audio_chunk * chunk)
{
faacDecFrameInfo frameInfo;
unsigned char *buffer;
unsigned __int32 buffer_size;
void *sample_buffer;
if (sampleId == MP4_INVALID_SAMPLE_ID)
{
console::error("Invalid sampleId.", "foo_mp4");
return 0;
}
do {
buffer = NULL;
buffer_size = 0;
MP4ReadSample(hFile, track, sampleId,
(unsigned __int8**)&buffer, &buffer_size,
NULL, NULL, NULL, NULL);
sampleId++;
sample_buffer = faacDecDecode(hDecoder, &frameInfo, buffer, buffer_size);
if (buffer) free(buffer);
} while ((frameInfo.error == 0) && (frameInfo.samples == 0));
if (frameInfo.error)
{
console::warning(faacDecGetErrorMessage(frameInfo.error), "foo_mp4");
console::warning("Skipping frame", "foo_mp4");
}
if (sampleId > numSamples)
return 0;
if (frameInfo.channels == 0)
{
chunk->set_data((audio_sample*)sample_buffer, 0, frameInfo.channels, frameInfo.samplerate);
} else {
chunk->set_data((audio_sample*)sample_buffer, frameInfo.samples/frameInfo.channels,
frameInfo.channels, frameInfo.samplerate);
}
return 1;
}
virtual int set_info(reader *r,const file_info * info)
{
m_reader = r;
hFile = MP4ModifyCb(0, 0, open_cb, close_cb, read_cb, write_cb,
setpos_cb, getpos_cb, filesize_cb, (void*)m_reader);
if (hFile == MP4_INVALID_FILE_HANDLE) return 0;
MP4MetadataDelete(hFile);
/* replay gain writing */
const char *p = NULL;
p = info->info_get("REPLAYGAIN_TRACK_PEAK");
if (p)
MP4SetMetadataFreeForm(hFile, "REPLAYGAIN_TRACK_PEAK", (unsigned __int8*)p, strlen(p));
p = info->info_get("REPLAYGAIN_TRACK_GAIN");
if (p)
MP4SetMetadataFreeForm(hFile, "REPLAYGAIN_TRACK_GAIN", (unsigned __int8*)p, strlen(p));
p = info->info_get("REPLAYGAIN_ALBUM_PEAK");
if (p)
MP4SetMetadataFreeForm(hFile, "REPLAYGAIN_ALBUM_PEAK", (unsigned __int8*)p, strlen(p));
p = info->info_get("REPLAYGAIN_ALBUM_GAIN");
if (p)
MP4SetMetadataFreeForm(hFile, "REPLAYGAIN_ALBUM_GAIN", (unsigned __int8*)p, strlen(p));
int numItems = info->meta_get_count();
if (numItems > 0)
{
for (int i = 0; i < numItems; i++)
{
char *pName = (char*)info->meta_enum_name(i);
const char *val = info->meta_enum_value(i);
if (strcmp(pName, "TITLE") == 0)
{
MP4SetMetadataName(hFile, val);
} else if (strcmp(pName, "ARTIST") == 0) {
MP4SetMetadataArtist(hFile, val);
} else if (strcmp(pName, "WRITER") == 0) {
MP4SetMetadataWriter(hFile, val);
} else if (strcmp(pName, "ALBUM") == 0) {
MP4SetMetadataAlbum(hFile, val);
} else if (strcmp(pName, "YEAR") == 0) {
MP4SetMetadataYear(hFile, val);
} else if (strcmp(pName, "TOOL") == 0) {
MP4SetMetadataTool(hFile, val);
} else if (strcmp(pName, "COMMENT") == 0) {
MP4SetMetadataComment(hFile, val);
} else if (strcmp(pName, "GENRE") == 0) {
MP4SetMetadataGenre(hFile, val);
} else if (strcmp(pName, "TRACKNUMBER") == 0) {
unsigned __int16 trkn = 0, tot = 0;
sscanf(val, "%d", &trkn);
MP4SetMetadataTrack(hFile, trkn, tot);
} else if (strcmp(pName, "DISKNUMBER") == 0) {
unsigned __int16 disk = 0, tot = 0;
sscanf(val, "%d", &disk);
MP4SetMetadataDisk(hFile, disk, tot);
} else if (strcmp(pName, "COMPILATION") == 0) {
unsigned __int8 cpil = 0;
sscanf(val, "%d", &cpil);
MP4SetMetadataCompilation(hFile, cpil);
} else if (strcmp(pName, "TEMPO") == 0) {
unsigned __int16 tempo = 0;
sscanf(val, "%d", &tempo);
MP4SetMetadataTempo(hFile, tempo);
} else {
MP4SetMetadataFreeForm(hFile, pName, (unsigned __int8*)val, strlen(val));
}
}
}
/* end */
return 1;
}
virtual int seek(double seconds)
{
MP4Duration duration;
duration = MP4ConvertToTrackDuration(hFile,
track, seconds, MP4_SECS_TIME_SCALE);
sampleId = MP4GetSampleIdFromTime(hFile,
track, duration, 0);
return 1;
}
virtual int is_our_content_type(const char *url, const char *type)
{
return !strcmp(type, "audio/mp4") || !strcmp(type, "audio/x-mp4");
}
private:
reader *m_reader;
faacDecHandle hDecoder;
MP4FileHandle hFile;
MP4SampleId sampleId, numSamples;
MP4TrackId track;
int ReadMP4Tag(file_info *info)
{
unsigned __int32 valueSize = 0;
unsigned __int8* pValue;
char* pName;
int i = 0;
do {
valueSize = 0;
MP4GetMetadataByIndex(hFile, i, (const char**)&pName, &pValue, &valueSize);
if (valueSize > 0)
{
char* val = (char*)malloc((valueSize+1)*sizeof(char));
memset(val, 0, (valueSize+1)*sizeof(char));
memcpy(val, pValue, valueSize*sizeof(char));
if (pName[0] == '�')
{
if (memcmp(pName, "�nam", 4) == 0)
{
info->meta_add("TITLE", val);
} else if (memcmp(pName, "�ART", 4) == 0) {
info->meta_add("ARTIST", val);
} else if (memcmp(pName, "�wrt", 4) == 0) {
info->meta_add("WRITER", val);
} else if (memcmp(pName, "�alb", 4) == 0) {
info->meta_add("ALBUM", val);
} else if (memcmp(pName, "�day", 4) == 0) {
info->meta_add("YEAR", val);
} else if (memcmp(pName, "�too", 4) == 0) {
info->info_set("TOOL", val);
} else if (memcmp(pName, "�cmt", 4) == 0) {
info->meta_add("COMMENT", val);
} else if (memcmp(pName, "�gen", 4) == 0) {
info->meta_add("GENRE", val);
} else {
info->meta_add(pName, val);
}
} else if (memcmp(pName, "gnre", 4) == 0) {
char *t;
MP4GetMetadataGenre(hFile, &t);
info->meta_add("GENRE", t);
} else if (memcmp(pName, "trkn", 4) == 0) {
unsigned __int16 trkn = 0, tot = 0;
char t[200];
MP4GetMetadataTrack(hFile, &trkn, &tot);
wsprintf(t, "%d", trkn);
info->meta_add("TRACKNUMBER", t);
} else if (memcmp(pName, "disk", 4) == 0) {
unsigned __int16 disk = 0, tot = 0;
char t[200];
MP4GetMetadataDisk(hFile, &disk, &tot);
wsprintf(t, "%d", disk);
info->meta_add("DISKNUMBER", t);
} else if (memcmp(pName, "cpil", 4) == 0) {
unsigned __int8 cpil = 0;
char t[200];
MP4GetMetadataCompilation(hFile, &cpil);
wsprintf(t, "%d", cpil);
info->meta_add("COMPILATION", t);
} else if (memcmp(pName, "tmpo", 4) == 0) {
unsigned __int16 tempo = 0;
char t[200];
MP4GetMetadataTempo(hFile, &tempo);
wsprintf(t, "%d BPM", tempo);
info->meta_add("TEMPO", t);
} else {
float f = 0;
if (!strcmp(pName, "REPLAYGAIN_TRACK_PEAK"))
{
sscanf(val, "%f", &f);
info->info_set_replaygain_track_peak((double)f);
} else if (!strcmp(pName, "REPLAYGAIN_TRACK_GAIN")) {
sscanf(val, "%f", &f);
info->info_set_replaygain_track_gain((double)f);
} else if (!strcmp(pName, "REPLAYGAIN_ALBUM_PEAK")) {
sscanf(val, "%f", &f);
info->info_set_replaygain_album_peak((double)f);
} else if (!strcmp(pName, "REPLAYGAIN_ALBUM_GAIN")) {
sscanf(val, "%f", &f);
info->info_set_replaygain_album_gain((double)f);
} else {
info->meta_add(pName, val);
}
}
}
i++;
} while (valueSize > 0);
return 1;
}
int GetAACTrack(MP4FileHandle infile)
{
/* find AAC track */
int i, rc;
int numTracks = MP4GetNumberOfTracks(infile, NULL, /* subType */ 0);
for (i = 0; i < numTracks; i++)
{
MP4TrackId trackId = MP4FindTrackId(infile, i, NULL, /* subType */ 0);
const char* trackType = MP4GetTrackType(infile, trackId);
if (!strcmp(trackType, MP4_AUDIO_TRACK_TYPE))
{
unsigned char *buff = NULL;
int buff_size = 0;
mp4AudioSpecificConfig mp4ASC;
MP4GetTrackESConfiguration(infile, trackId,
(unsigned __int8**)&buff, (unsigned __int32*)&buff_size);
if (buff)
{
rc = AudioSpecificConfig(buff, buff_size, &mp4ASC);
free(buff);
if (rc < 0)
return -1;
return trackId;
}
}
}
/* can't decode this */
return -1;
}
/* file callback stuff */
static unsigned __int32 open_cb(const char *pName,
const char *mode, void *userData)
{
DBG_OUT("open_cb");
return 1;
}
static void close_cb(void *userData)
{
DBG_OUT("close_cb");
return;
}
static unsigned __int32 read_cb(void *pBuffer, unsigned int nBytesToRead,
void *userData)
{
DBG_OUT("read_cb");
reader *r = (reader*)userData;
return r->read(pBuffer, nBytesToRead);
}
static unsigned __int32 write_cb(void *pBuffer, unsigned int nBytesToWrite,
void *userData)
{
DBG_OUT("write_cb");
reader *r = (reader*)userData;
return r->write(pBuffer, nBytesToWrite);
}
static __int64 getpos_cb(void *userData)
{
DBG_OUT("getpos_cb");
reader *r = (reader*)userData;
return r->get_position();
}
static __int32 setpos_cb(unsigned __int32 pos, void *userData)
{
DBG_OUT("setpos_cb");
reader *r = (reader*)userData;
return !(r->seek(pos));
}
static __int64 filesize_cb(void *userData)
{
DBG_OUT("filesize_cb");
reader *r = (reader*)userData;
return r->get_length();
}
};
struct seek_list
{
seek_list *next;
__int64 offset;
};
class input_aac : public input
{
public:
virtual int test_filename(const char * fn,const char * ext)
{
return !stricmp(ext,"AAC");
}
virtual int open(reader *r, file_info *info, int full_open)
{
int tagsize = 0, tmp = 0;
int bread = 0;
double length = 1.;
__int64 bitrate = 128;
unsigned char channels = 0;
unsigned long samplerate = 0;
faacDecConfigurationPtr config;
m_reader = r;
hDecoder = faacDecOpen();
if (!hDecoder)
{
console::error("Failed to open FAAD2 library.", "foo_mp4");
return 0;
}
config = faacDecGetCurrentConfiguration(hDecoder);
config->outputFormat = FAAD_FMT_DOUBLE;
faacDecSetConfiguration(hDecoder, config);
tag_reader::g_run_multi(m_reader, info, "ape|id3v2|lyrics3|id3v1");
m_at_eof = 0;
if (!(m_aac_buffer = (unsigned char*)malloc(768*6)))
{
console::error("Memory allocation error.", "foo_mp4");
return 0;
}
memset(m_aac_buffer, 0, 768*6);
bread = m_reader->read(m_aac_buffer, 768*6);
m_aac_bytes_into_buffer = bread;
m_aac_bytes_consumed = 0;
m_file_offset = 0;
if (bread != 768*6)
m_at_eof = 1;
if (!memcmp(m_aac_buffer, "ID3", 3))
{
/* high bit is not used */
tagsize = (m_aac_buffer[6] << 21) | (m_aac_buffer[7] << 14) |
(m_aac_buffer[8] << 7) | (m_aac_buffer[9] << 0);
tagsize += 10;
advance_buffer(tagsize);
}
m_head = (struct seek_list*)malloc(sizeof(struct seek_list));
m_tail = m_head;
m_tail->next = NULL;
m_header_type = 0;
if ((m_aac_buffer[0] == 0xFF) && ((m_aac_buffer[1] & 0xF6) == 0xF0))
{
if (m_reader->can_seek())
{
adts_parse(&bitrate, &length);
m_reader->seek(tagsize);
bread = m_reader->read(m_aac_buffer, 768*6);
if (bread != 768*6)
m_at_eof = 1;
else
m_at_eof = 0;
m_aac_bytes_into_buffer = bread;
m_aac_bytes_consumed = 0;
m_header_type = 1;
}
} else if (memcmp(m_aac_buffer, "ADIF", 4) == 0) {
int skip_size = (m_aac_buffer[4] & 0x80) ? 9 : 0;
bitrate = ((unsigned int)(m_aac_buffer[4 + skip_size] & 0x0F)<<19) |
((unsigned int)m_aac_buffer[5 + skip_size]<<11) |
((unsigned int)m_aac_buffer[6 + skip_size]<<3) |
((unsigned int)m_aac_buffer[7 + skip_size] & 0xE0);
length = (double)m_reader->get_length();
if (length == -1.)
{
length = 1;
} else {
length = ((double)length*8.)/((double)bitrate) + 0.5;
}
bitrate = (__int64)((double)bitrate/1000.0 + 0.5);
m_header_type = 2;
}
if (!m_reader->can_seek())
{
length = 0;
}
fill_buffer();
if ((m_aac_bytes_consumed = faacDecInit(hDecoder,
m_aac_buffer, m_aac_bytes_into_buffer,
&samplerate, &channels)) < 0)
{
console::error("Can't initialize decoder library.", "foo_mp4");
return 0;
}
advance_buffer(m_aac_bytes_consumed);
info->info_set("codec", "AAC");
if (m_header_type == 0)
info->info_set("stream type", "RAW");
else if (m_header_type == 1)
info->info_set("stream type", "ADTS");
else if (m_header_type == 2)
info->info_set("stream type", "ADIF");
info->set_length(length);
info->info_set_int("bitrate", bitrate);
info->info_set_int("channels", (__int64)channels);
info->info_set_int("samplerate", (__int64)samplerate);
m_samplerate = samplerate;
return 1;
}
input_aac()
{
m_head = NULL;
m_tail = NULL;
cur_pos_sec = 0.0;
m_samplerate = 0;
hDecoder = NULL;
m_aac_buffer = NULL;
}
~input_aac()
{
struct seek_list *target = m_head;
if (hDecoder)
faacDecClose(hDecoder);
if (m_aac_buffer)
free(m_aac_buffer);
while (target)
{
struct seek_list *tmp = target;
target = target->next;
if (tmp) free(tmp);
}
}
virtual int run(audio_chunk * chunk)
{
faacDecFrameInfo frameInfo;
void *sample_buffer;
memset(&frameInfo, 0, sizeof(faacDecFrameInfo));
do
{
fill_buffer();
if (m_aac_bytes_into_buffer != 0)
{
sample_buffer = faacDecDecode(hDecoder, &frameInfo,
m_aac_buffer, m_aac_bytes_into_buffer);
if (m_header_type != 1)
{
m_tail->offset = m_file_offset;
m_tail->next = (struct seek_list*)malloc(sizeof(struct seek_list));
m_tail = m_tail->next;
m_tail->next = NULL;
}
advance_buffer(frameInfo.bytesconsumed);
} else {
break;
}
} while (!frameInfo.samples && !frameInfo.error);
if (frameInfo.error || (m_aac_bytes_into_buffer == 0))
{
if (frameInfo.error)
{
if (faacDecGetErrorMessage(frameInfo.error) != NULL)
console::error(faacDecGetErrorMessage(frameInfo.error), "foo_mp4");
}
return 0;
}
if (chunk)
{
if (frameInfo.channels == 0)
{
chunk->set_data((audio_sample*)sample_buffer, 0, frameInfo.channels, frameInfo.samplerate);
} else {
chunk->set_data((audio_sample*)sample_buffer, frameInfo.samples/frameInfo.channels,
frameInfo.channels, frameInfo.samplerate);
}
}
m_samplerate = frameInfo.samplerate;
cur_pos_sec += 1024.0/(double)m_samplerate;
return 1;
}
virtual int set_info(reader *r,const file_info * info)
{
return tag_writer::g_run(r,info,"ape");
}
virtual int seek(double seconds)
{
int i, frames;
int bread;
struct seek_list *target = m_head;
if (m_reader->can_seek() && ((m_header_type == 1) || (seconds < cur_pos_sec)))
{
frames = (int)(seconds*((double)m_samplerate/1024.0) + 0.5);
for (i = 0; i < frames; i++)
{
if (target->next)
target = target->next;
else
return 1;
}
if (target->offset == 0 && frames > 0)
return 1;
m_reader->seek(target->offset);
bread = m_reader->read(m_aac_buffer, 768*6);
if (bread != 768*6)
m_at_eof = 1;
else
m_at_eof = 0;
m_aac_bytes_into_buffer = bread;
m_aac_bytes_consumed = 0;
return 1;
} else {
if (seconds > cur_pos_sec)
{
frames = (int)((seconds - cur_pos_sec)*((double)m_samplerate/1024.0) + 0.5);
if (frames > 0)
{
for (i = 0; i < frames; i++)
{
if (!run(NULL))
return 1;
}
}
return 1;
} else {
return 0;
}
}
}
virtual int is_our_content_type(const char *url, const char *type)
{
return !strcmp(type, "audio/aac") || !strcmp(type, "audio/x-aac");
}
private:
reader *m_reader;
faacDecHandle hDecoder;
long m_aac_bytes_into_buffer;
long m_aac_bytes_consumed;
__int64 m_file_offset;
unsigned char *m_aac_buffer;
int m_at_eof;
unsigned long m_samplerate;
double cur_pos_sec;
int m_header_type;
struct seek_list *m_head;
struct seek_list *m_tail;
int fill_buffer()
{
int bread;
if (m_aac_bytes_consumed > 0)
{
if (m_aac_bytes_into_buffer)
{
memmove((void*)m_aac_buffer, (void*)(m_aac_buffer + m_aac_bytes_consumed),
m_aac_bytes_into_buffer*sizeof(unsigned char));
}
if (!m_at_eof)
{
bread = m_reader->read((void*)(m_aac_buffer + m_aac_bytes_into_buffer),
m_aac_bytes_consumed);
if (bread != m_aac_bytes_consumed)
m_at_eof = 1;
m_aac_bytes_into_buffer += bread;
}
m_aac_bytes_consumed = 0;
if (m_aac_bytes_into_buffer > 3)
{
if (memcmp(m_aac_buffer, "TAG", 3) == 0)
m_aac_bytes_into_buffer = 0;
}
if (m_aac_bytes_into_buffer > 11)
{
if (memcmp(m_aac_buffer, "LYRICSBEGIN", 11) == 0)
m_aac_bytes_into_buffer = 0;
}
if (m_aac_bytes_into_buffer > 8)
{
if (memcmp(m_aac_buffer, "APETAGEX", 8) == 0)
m_aac_bytes_into_buffer = 0;
}
}
return 1;
}
void advance_buffer(int bytes)
{
m_file_offset += bytes;
m_aac_bytes_consumed = bytes;
m_aac_bytes_into_buffer -= bytes;
}
int adts_parse(__int64 *bitrate, double *length)
{
static int sample_rates[] = {96000,88200,64000,48000,44100,32000,24000,22050,16000,12000,11025,8000};
int frames, frame_length;
int t_framelength = 0;
int samplerate;
double frames_per_sec, bytes_per_frame;
/* Read all frames to ensure correct time and bitrate */
for (frames = 0; /* */; frames++)
{
fill_buffer();
if (m_aac_bytes_into_buffer > 7)
{
/* check syncword */
if (!((m_aac_buffer[0] == 0xFF)&&((m_aac_buffer[1] & 0xF6) == 0xF0)))
break;
m_tail->offset = m_file_offset;
m_tail->next = (struct seek_list*)malloc(sizeof(struct seek_list));
m_tail = m_tail->next;
m_tail->next = NULL;
if (frames == 0)
samplerate = sample_rates[(m_aac_buffer[2]&0x3c)>>2];
frame_length = ((((unsigned int)m_aac_buffer[3] & 0x3)) << 11)
| (((unsigned int)m_aac_buffer[4]) << 3) | (m_aac_buffer[5] >> 5);
t_framelength += frame_length;
if (frame_length > m_aac_bytes_into_buffer)
break;
advance_buffer(frame_length);
} else {
break;
}
}
frames_per_sec = (double)samplerate/1024.0;
if (frames != 0)
bytes_per_frame = (double)t_framelength/(double)(frames*1000);
else
bytes_per_frame = 0;
*bitrate = (__int64)(8. * bytes_per_frame * frames_per_sec + 0.5);
if (frames_per_sec != 0)
*length = (double)frames/frames_per_sec;
else
*length = 1;
return 1;
}
};
static service_factory_t<input,input_mp4> foo_mp4;
static service_factory_t<input,input_aac> foo_aac;