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rockbox/apps/metadata/rm.c
Mohamed Tarek 26cee86a0c Add support for AC3 audio in RM container. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22155 a1c6a512-1295-4272-9138-f99709370657
2009-08-04 13:54:06 +00:00

429 lines
14 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id:$
*
* Copyright (C) 2009 Mohamed Tarek
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <inttypes.h>
#include <codecs/librm/rm.h>
#include "system.h"
#include "metadata.h"
#include "metadata_common.h"
#include "metadata_parsers.h"
#include "logf.h"
/* Uncomment the following line for debugging */
//#define DEBUG_RM
#ifndef DEBUG_RM
#undef DEBUGF
#define DEBUGF(...)
#endif
static inline void print_cook_extradata(RMContext *rmctx) {
DEBUGF(" cook_version = 0x%08x\n", get_uint32be(rmctx->codec_extradata));
DEBUGF(" samples_per_frame_per_channel = %d\n", get_uint16be(&rmctx->codec_extradata[4]));
DEBUGF(" number_of_subbands_in_freq_domain = %d\n", get_uint16be(&rmctx->codec_extradata[6]));
if(rmctx->extradata_size == 16) {
DEBUGF(" joint_stereo_subband_start = %d\n",get_uint16be(&rmctx->codec_extradata[12]));
DEBUGF(" joint_stereo_vlc_bits = %d\n", get_uint16be(&rmctx->codec_extradata[14]));
}
}
struct real_object_t
{
uint32_t fourcc;
uint32_t size;
uint16_t version;
};
#define FOURCC(a,b,c,d) (((a)<<24) | ((b) << 16) | ((c) << 8) | (d))
static int real_read_object_header(int fd, struct real_object_t* obj)
{
int n;
if ((n = read_uint32be(fd, &obj->fourcc)) <= 0) return n;
if ((n = read_uint32be(fd, &obj->size)) <= 0) return n;
if ((n = read_uint16be(fd, &obj->version)) <= 0) return n;
return 1;
}
#if (defined(SIMULATOR) && defined(DEBUG_RM))
static char* fourcc2str(uint32_t f)
{
static char res[5];
res[0] = (f & 0xff000000) >> 24;
res[1] = (f & 0xff0000) >> 16;
res[2] = (f & 0xff00) >> 8;
res[3] = (f & 0xff);
res[4] = 0;
return res;
}
#endif
static inline int real_read_audio_stream_info(int fd, RMContext *rmctx)
{
int skipped = 0;
uint32_t version;
struct real_object_t obj;
#ifdef SIMULATOR
uint32_t header_size;
uint16_t flavor;
uint32_t coded_framesize;
uint8_t interleaver_id_length;
uint8_t fourcc_length;
#endif
uint32_t interleaver_id;
uint32_t fourcc = 0;
memset(&obj,0,sizeof(obj));
read_uint32be(fd, &version);
skipped += 4;
DEBUGF(" version=0x%04lx\n",((version >> 16) & 0xff));
if (((version >> 16) & 0xff) == 3) {
/* Very old version */
} else {
#ifdef SIMULATOR
real_read_object_header(fd, &obj);
read_uint32be(fd, &header_size);
/* obj.size will be filled with an unknown value, replaced with header_size */
DEBUGF(" Object: %s, size: %ld bytes, version: 0x%04x\n",fourcc2str(obj.fourcc),header_size,obj.version);
read_uint16be(fd, &flavor);
read_uint32be(fd, &coded_framesize);
#else
lseek(fd, 20, SEEK_CUR);
#endif
lseek(fd, 12, SEEK_CUR); /* unknown */
read_uint16be(fd, &rmctx->sub_packet_h);
read_uint16be(fd, &rmctx->block_align);
read_uint16be(fd, &rmctx->sub_packet_size);
lseek(fd, 2, SEEK_CUR); /* unknown */
skipped += 40;
if (((version >> 16) & 0xff) == 5)
{
lseek(fd, 6, SEEK_CUR); /* unknown */
skipped += 6;
}
read_uint16be(fd, &rmctx->sample_rate);
lseek(fd, 4, SEEK_CUR); /* unknown */
read_uint16be(fd, &rmctx->nb_channels);
skipped += 8;
if (((version >> 16) & 0xff) == 4)
{
#ifdef SIMULATOR
read_uint8(fd, &interleaver_id_length);
read_uint32be(fd, &interleaver_id);
read_uint8(fd, &fourcc_length);
#else
lseek(fd, 6, SEEK_CUR);
#endif
read_uint32be(fd, &fourcc);
skipped += 10;
}
if (((version >> 16) & 0xff) == 5)
{
read_uint32be(fd, &interleaver_id);
read_uint32be(fd, &fourcc);
skipped += 8;
}
lseek(fd, 3, SEEK_CUR); /* unknown */
skipped += 3;
if (((version >> 16) & 0xff) == 5)
{
lseek(fd, 1, SEEK_CUR); /* unknown */
skipped += 1;
}
switch(fourcc) {
case FOURCC('c','o','o','k'):
rmctx->codec_type = CODEC_COOK;
read_uint32be(fd, &rmctx->extradata_size);
skipped += 4;
read(fd, rmctx->codec_extradata, rmctx->extradata_size);
skipped += rmctx->extradata_size;
break;
case FOURCC('r','a','a','c'):
case FOURCC('r','a','c','p'):
rmctx->codec_type = CODEC_AAC;
read_uint32be(fd, &rmctx->extradata_size);
skipped += 4;
read(fd, rmctx->codec_extradata, rmctx->extradata_size);
skipped += rmctx->extradata_size;
break;
case FOURCC('d','n','e','t'):
rmctx->codec_type = CODEC_AC3;
break;
default: /* Not a supported codec */
return -1;
}
DEBUGF(" flavor = %d\n",flavor);
DEBUGF(" coded_frame_size = %ld\n",coded_framesize);
DEBUGF(" sub_packet_h = %d\n",rmctx->sub_packet_h);
DEBUGF(" frame_size = %d\n",rmctx->block_align);
DEBUGF(" sub_packet_size = %d\n",rmctx->sub_packet_size);
DEBUGF(" sample_rate= %d\n",rmctx->sample_rate);
DEBUGF(" channels= %d\n",rmctx->nb_channels);
DEBUGF(" fourcc = %s\n",fourcc2str(fourcc));
DEBUGF(" codec_extra_data_length = %ld\n",rmctx->extradata_size);
DEBUGF(" codec_extradata :\n");
if(rmctx->codec_type == CODEC_COOK) {
DEBUGF(" cook_extradata :\n");
print_cook_extradata(rmctx);
}
}
return skipped;
}
static int rm_parse_header(int fd, RMContext *rmctx, struct mp3entry *id3)
{
struct real_object_t obj;
int res;
int skipped;
off_t curpos;
uint8_t len; /* Holds a string_length, which is then passed to read_string() */
#ifdef SIMULATOR
uint32_t avg_bitrate = 0;
uint32_t max_packet_size;
uint32_t avg_packet_size;
uint32_t packet_count;
uint32_t duration;
uint32_t preroll;
uint32_t index_offset;
uint16_t stream_id;
uint32_t start_time;
uint32_t codec_data_size;
#endif
uint32_t v;
uint32_t max_bitrate;
uint16_t num_streams;
uint32_t next_data_off;
uint8_t header_end;
memset(&obj,0,sizeof(obj));
curpos = lseek(fd, 0, SEEK_SET);
res = real_read_object_header(fd, &obj);
if (obj.fourcc == FOURCC('.','r','a',0xfd))
{
/* Very old .ra format - not yet supported */
return -1;
}
else if (obj.fourcc != FOURCC('.','R','M','F'))
{
return -1;
}
lseek(fd, 8, SEEK_CUR); /* unknown */
DEBUGF("Object: %s, size: %d bytes, version: 0x%04x, pos: %d\n",fourcc2str(obj.fourcc),(int)obj.size,obj.version,(int)curpos);
res = real_read_object_header(fd, &obj);
header_end = 0;
while(res)
{
DEBUGF("Object: %s, size: %d bytes, version: 0x%04x, pos: %d\n",fourcc2str(obj.fourcc),(int)obj.size,obj.version,(int)curpos);
skipped = 10;
if(obj.fourcc == FOURCC('I','N','D','X'))
break;
switch (obj.fourcc)
{
case FOURCC('P','R','O','P'): /* File properties */
read_uint32be(fd, &max_bitrate);
read_uint32be(fd, &rmctx->bit_rate); /*avg bitrate*/
#ifdef SIMULATOR
read_uint32be(fd, &max_packet_size);
read_uint32be(fd, &avg_packet_size);
read_uint32be(fd, &packet_count);
#else
lseek(fd, 3*sizeof(uint32_t), SEEK_CUR);
#endif
read_uint32be(fd, &rmctx->duration);
#ifdef SIMULATOR
read_uint32be(fd, &preroll);
read_uint32be(fd, &index_offset);
#else
lseek(fd, 2*sizeof(uint32_t), SEEK_CUR);
#endif
read_uint32be(fd, &rmctx->data_offset);
read_uint16be(fd, &num_streams);
read_uint16be(fd, &rmctx->flags);
skipped += 40;
DEBUGF(" max_bitrate = %ld\n",max_bitrate);
DEBUGF(" avg_bitrate = %ld\n",rmctx->bit_rate);
DEBUGF(" max_packet_size = %ld\n",max_packet_size);
DEBUGF(" avg_packet_size = %ld\n",avg_packet_size);
DEBUGF(" packet_count = %ld\n",packet_count);
DEBUGF(" duration = %ld\n",rmctx->duration);
DEBUGF(" preroll = %ld\n",preroll);
DEBUGF(" index_offset = %ld\n",index_offset);
DEBUGF(" data_offset = %ld\n",rmctx->data_offset);
DEBUGF(" num_streams = %d\n",num_streams);
DEBUGF(" flags=0x%04x\n",rmctx->flags);
break;
case FOURCC('C','O','N','T'):
/* Four strings - Title, Author, Copyright, Comment */
read_uint8(fd,&len);
skipped += (int)read_string(fd, id3->id3v1buf[0], sizeof(id3->id3v1buf[0]), '\0', len);
read_uint8(fd,&len);
skipped += (int)read_string(fd, id3->id3v1buf[1], sizeof(id3->id3v1buf[1]), '\0', len);
read_uint8(fd,&len);
skipped += (int)read_string(fd, id3->id3v1buf[2], sizeof(id3->id3v1buf[2]), '\0', len);
read_uint8(fd,&len);
skipped += (int)read_string(fd, id3->id3v1buf[3], sizeof(id3->id3v1buf[3]), '\0', len);
skipped += 4;
DEBUGF(" title=\"%s\"\n",id3->id3v1buf[0]);
DEBUGF(" author=\"%s\"\n",id3->id3v1buf[1]);
DEBUGF(" copyright=\"%s\"\n",id3->id3v1buf[2]);
DEBUGF(" comment=\"%s\"\n",id3->id3v1buf[3]);
break;
case FOURCC('M','D','P','R'): /* Media properties */
#ifdef SIMULATOR
read_uint16be(fd,&stream_id);
read_uint32be(fd,&max_bitrate);
read_uint32be(fd,&avg_bitrate);
read_uint32be(fd,&max_packet_size);
read_uint32be(fd,&avg_packet_size);
read_uint32be(fd,&start_time);
read_uint32be(fd,&preroll);
read_uint32be(fd,&duration);
#else
lseek(fd, 30, SEEK_CUR);
#endif
skipped += 30;
read_uint8(fd,&len);
skipped += 1;
lseek(fd, len, SEEK_CUR); /* desc */
skipped += len;
read_uint8(fd,&len);
skipped += 1;
#ifdef SIMULATOR
lseek(fd, len, SEEK_CUR); /* mimetype */
read_uint32be(fd,&codec_data_size);
#else
lseek(fd, len + 4, SEEK_CUR);
#endif
skipped += len + 4;
//From ffmpeg: codec_pos = url_ftell(pb);
read_uint32be(fd,&v);
skipped += 4;
DEBUGF(" stream_id = 0x%04x\n",stream_id);
DEBUGF(" max_bitrate = %ld\n",max_bitrate);
DEBUGF(" avg_bitrate = %ld\n",avg_bitrate);
DEBUGF(" max_packet_size = %ld\n",max_packet_size);
DEBUGF(" avg_packet_size = %ld\n",avg_packet_size);
DEBUGF(" start_time = %ld\n",start_time);
DEBUGF(" preroll = %ld\n",preroll);
DEBUGF(" duration = %ld\n",duration);
DEBUGF(" codec_data_size = %ld\n",codec_data_size);
DEBUGF(" v=\"%s\"\n", fourcc2str(v));
if (v == FOURCC('.','r','a',0xfd))
{
skipped += real_read_audio_stream_info(fd, rmctx);
if(skipped < 0)
return -1;
}
break;
case FOURCC('D','A','T','A'):
read_uint32be(fd,&rmctx->nb_packets);
skipped += 4;
read_uint32be(fd,&next_data_off);
skipped += 4;
/***
* nb_packets correction :
* in some samples, number of packets may not exactly form
* an integer number of scrambling units. This is corrected
* by constructing a partially filled unit out of the few
* remaining samples at the end of decoding.
***/
if(rmctx->nb_packets % rmctx->sub_packet_h)
rmctx->nb_packets += rmctx->sub_packet_h - (rmctx->nb_packets % rmctx->sub_packet_h);
DEBUGF(" data_nb_packets = %ld\n",rmctx->nb_packets);
DEBUGF(" next DATA offset = %ld\n",next_data_off);
header_end = 1;
break;
}
if(header_end) break;
curpos = lseek(fd, obj.size - skipped, SEEK_CUR);
res = real_read_object_header(fd, &obj);
}
return 0;
}
bool get_rm_metadata(int fd, struct mp3entry* id3)
{
RMContext *rmctx = (RMContext*) (( (intptr_t)id3->id3v2buf + 3 ) &~ 3);
memset(rmctx,0,sizeof(RMContext));
if(rm_parse_header(fd, rmctx, id3) < 0)
return false;
/* Copy tags */
id3->title = id3->id3v1buf[0];
id3->artist = id3->id3v1buf[1];
id3->comment = id3->id3v1buf[3];
switch(rmctx->codec_type)
{
case CODEC_COOK:
/* Already set, do nothing */
break;
case CODEC_AAC:
id3->codectype = AFMT_RM_AAC;
break;
case CODEC_AC3:
id3->codectype = AFMT_RM_AC3;
break;
}
id3->bitrate = rmctx->bit_rate / 1000;
id3->frequency = rmctx->sample_rate;
id3->length = rmctx->duration;
id3->filesize = filesize(fd);
return true;
}
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