/*****************************************************************************
* FUNCTION
* daf_seek
* DESCRIPTION
*
* PARAMETERS
* input_stream [?]
* offset [?]
* aud_info_struct *info_p(?)
* RETURNS
* kal_bool
*****************************************************************************/
kal_bool daf_seek(audio_input_stream_struct *input_stream, kal_uint32 *offset)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_int32 v2_tag_size;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
if (*offset == 0)
{
/* skip id3v2 tag */
if (audio_input_stream_read(input_stream, 10) != 10)
{
return KAL_FALSE;
}
if ((v2_tag_size = id3_tag_parse_v2_tag_size(input_stream->ptr)) > 0)
{
*offset = v2_tag_size;
}
}
audio_input_stream_seek(input_stream, (kal_int32) * offset);
if (!daf_parse(input_stream, offset, NULL))
{
return KAL_FALSE;
}
audio_input_stream_seek(input_stream, (kal_int32) * offset);
return KAL_TRUE;
}
/*****************************************************************************
* FUNCTION
* daf_seek
* DESCRIPTION
*
* IMPACT
*
* PARAMETERS
* aud_info_struct *info_p
* kal_uint32* offset
* RETURNS
* kal_bool
* GLOBALS AFFECTED
*
*****************************************************************************/
kal_bool daf_seek( audio_input_stream_struct *input_stream, kal_uint32* offset )
{
kal_int32 v2_tag_size;
if( *offset == 0 )
{
// skip id3v2 tag
if( audio_input_stream_read( input_stream, 10 ) != 10 )
return KAL_FALSE;
if( ( v2_tag_size = id3_tag_parse_v2_tag_size( input_stream->ptr )) > 0 )
*offset = v2_tag_size;
}
audio_input_stream_seek( input_stream, (kal_int32) *offset );
if( !daf_parse( input_stream, offset, NULL ) )
return KAL_FALSE;
audio_input_stream_seek( input_stream, (kal_int32) *offset );
return KAL_TRUE;
}
/*****************************************************************************
* FUNCTION
* daf_parse_data_info
* DESCRIPTION
*
* PARAMETERS
* info_p [?]
* input_stream [?]
* id3_tag [?]
* RETURNS
* void
*****************************************************************************/
void daf_parse_data_info(aud_info_struct *info_p, audio_input_stream_struct *input_stream, id3_tag_struct *id3_tag)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_int32 data_size;
kal_uint32 offset;
kal_bool v2_result = KAL_FALSE;
kal_bool v1_result = KAL_FALSE;
kal_bool daf_parse_result;
daf_data_info_struct daf_data_info;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
/* zero all info_p */
memset(info_p, 0, sizeof(aud_info_struct));
/* init id3 tag data structure */
id3_tag_init(id3_tag);
audio_input_stream_seek(input_stream, 0);
/*
* check id3v2 magic word -- "ID3"
* and parse & save data to frames
*/
v2_result = id3_tag_parse_v2_tag(input_stream, id3_tag);
/*
* parse daf frame to get duration, bitrate, samplerate, channel_num
*/
if (v2_result)
{
/* skip id3v2 tag */
offset = id3_tag->v2_size + 10;
if (id3_tag->v2_footer)
{
offset += 10;
}
}
else
{
offset = 0;
}
audio_input_stream_seek(input_stream, offset);
daf_parse_result = daf_parse(input_stream, &offset, &daf_data_info);
/*
* parse id3v1 tag
*/
if ((data_size = audio_input_stream_get_data_size(input_stream)) >= 128)
{
/* move to last 128 bytes before file end for checking id3v1 tag */
audio_input_stream_seek(input_stream, data_size - 128);
/*
* check id3v1 magic word -- "TAG"
* and parse & save data to frames
*/
v1_result = id3_tag_parse_v1_tag(input_stream, id3_tag);
}
else
{
v1_result = KAL_FALSE;
}
/* copy title to info_p */
if (id3_tag->frames[ID3_FRAME_TITLE].text != NULL)
{
kal_wstrncpy(
(kal_wchar*) info_p->title,
(const kal_wchar*)id3_tag->frames[ID3_FRAME_TITLE].text,
MAX_ID3_TITLE_LEN);
}
/* copy artist to info_p */
if (id3_tag->frames[ID3_FRAME_ARTIST].text != NULL)
{
kal_wstrncpy(
(kal_wchar*) info_p->artist,
(const kal_wchar*)id3_tag->frames[ID3_FRAME_ARTIST].text,
MAX_ID3_ARTIST_LEN);
}
/* copy album to info_p */
if (id3_tag->frames[ID3_FRAME_ALBUM].text != NULL)
{
kal_wstrncpy(
(kal_wchar*) info_p->album,
(const kal_wchar*)id3_tag->frames[ID3_FRAME_ALBUM].text,
MAX_ID3_ALBUM_LEN);
}
/* copy genre to info_p */
if (id3_tag->frames[ID3_FRAME_GENRE].text != NULL)
{
kal_wstrncpy(
(kal_wchar*) info_p->genre,
(const kal_wchar*)id3_tag->frames[ID3_FRAME_GENRE].text,
MAX_ID3_GENRE_LEN);
}
/* copy year to info_p */
if (id3_tag->frames[ID3_FRAME_YEAR].text != NULL)
{
kal_wstrncpy(
(kal_wchar*) info_p->year,
(const kal_wchar*)id3_tag->frames[ID3_FRAME_YEAR].text,
MAX_ID3_YEAR_LEN);
}
if (daf_parse_result)
{
daf_set_data_info(
info_p,
daf_data_info.channel_num,
daf_data_info.duration,
data_size,
daf_data_info.bitrate,
daf_data_info.samplerate);
}
}
/*****************************************************************************
* FUNCTION
* daf_parse
* DESCRIPTION
*
* PARAMETERS
* input_stream [?]
* offset [?]
* info_p [?]
* FILE* file(?)
* RETURNS
* kal_bool
*****************************************************************************/
kal_bool daf_parse(audio_input_stream_struct *input_stream, kal_uint32 *offset, daf_data_info_struct *info_p)
{
/*----------------------------------------------------------------*/
/* Local Variables */
/*----------------------------------------------------------------*/
kal_uint8 result, sync_count;
kal_uint8 slot_bytes, frame_slots;
kal_int32 cur_pos, min_next_pos, max_next_pos, next_pos;
kal_uint32 data_size, movement;
daf_header_struct header;
/*----------------------------------------------------------------*/
/* Code Body */
/*----------------------------------------------------------------*/
input_stream->skip = *offset;
data_size = (kal_uint32) audio_input_stream_get_data_size(input_stream);
/* find the first frame with 2 consecutive frames */
for (movement = 0;; input_stream->free_bitrate = 0, movement = 1)
{
/* find the first frame */
if (!daf_find_next_frame(input_stream, &header, movement))
{
return KAL_FALSE; /* not found */
}
/* calculate current frame position */
cur_pos = input_stream->total_load - (input_stream->tail - input_stream->ptr);
/* calculate next frame position because we need to find 2 consecutive frames */
min_next_pos = cur_pos + header.min_frame_size;
max_next_pos = cur_pos + header.max_frame_size;
/* check if next frame position reference to a valid frame */
result = daf_check_next_frame(input_stream, &header, min_next_pos, max_next_pos, &next_pos);
if (result == DAF_CHECK_FRAME_EOF)
{
break;
}
else if (result == DAF_CHECK_FRAME_TRUE)
{
/* calculate the offset of the first found frame position */
*offset = (kal_uint32) cur_pos;
/* calc frame_size */
header.frame_size = next_pos - cur_pos;
/* check 2 consecutive frames */
for (sync_count = 0; sync_count < 2; sync_count++)
{
/* move to next frame */
input_stream->ptr += header.frame_size;
ASSERT(input_stream->ptr < input_stream->tail);
/* decode frame header */
daf_parse_frame_header(input_stream->ptr, &header);
/* calculate frame length for free bitrate */
if (header.bitrate == 0)
{
/* if it's a free bitrate frame but the first frame is not, it's false */
if (input_stream->free_bitrate == 0)
{
break;
}
header.bitrate = input_stream->free_bitrate;
slot_bytes = 1;
if (header.layer == DAF_LAYER_I)
{
frame_slots = 12;
slot_bytes = 4;
}
else if ((header.layer == DAF_LAYER_III) &&
(header.version == DAF_VERSION_2 || header.version == DAF_VERSION_2_5))
{
frame_slots = 72;
}
else
{
frame_slots = 144;
}
header.min_frame_size = (frame_slots * header.bitrate / header.sample_rate) * slot_bytes;
header.max_frame_size = header.min_frame_size + slot_bytes;
}
/* calculate current frame position */
cur_pos = input_stream->total_load - (input_stream->tail - input_stream->ptr);
/* calculate next frame position because we need to find 2 consecutive frames */
min_next_pos = cur_pos + header.min_frame_size;
max_next_pos = cur_pos + header.max_frame_size;
/* check if next frame position reference to a valid frame */
result = daf_check_next_frame(input_stream, &header, min_next_pos, max_next_pos, &next_pos);
if (result != DAF_CHECK_FRAME_TRUE)
{
break;
}
/* calc frame_size */
header.frame_size = next_pos - cur_pos;
}
if (result == DAF_CHECK_FRAME_EOF || sync_count == 2)
{
break;
}
else
{
audio_input_stream_seek(input_stream, (kal_int32) * offset);
}
}
}
if (info_p != NULL)
{
info_p->bitrate = header.bitrate;
info_p->duration = (data_size - *offset) * 8 / header.bitrate;
info_p->samplerate = header.sample_rate;
info_p->channel_num = header.channel_num;
}
return KAL_TRUE;
}
/*****************************************************************************
* FUNCTION
* daf_parse_data_info
* DESCRIPTION
*
* IMPACT
*
* PARAMETERS
* aud_info_struct *info_p
* audio_input_stream_struct* input_stream
* id3_tag_struct* id3_tag
* RETURNS
* void
* GLOBALS AFFECTED
*
*****************************************************************************/
void daf_parse_data_info( aud_info_struct *info_p, audio_input_stream_struct* input_stream, id3_tag_struct* lid3_tag )
{
kal_int32 data_size;
kal_uint32 offset;
kal_bool v2_result = KAL_FALSE;
kal_bool v1_result = KAL_FALSE;
kal_bool daf_parse_result;
daf_data_info_struct daf_data_info;
// init id3 tag data structure
id3_tag_init( lid3_tag );
audio_input_stream_seek( input_stream, 0 );
/*
* check id3v2 magic word -- "ID3"
* and parse & save data to frames
*/
v2_result = id3_tag_parse_v2_tag( input_stream, lid3_tag );
mmi_trace(1,"chenhe,daf_parse_data_info,v2_result is %d",v2_result);
/*
* parse daf frame to get duration, bitrate, samplerate, channel_num
*/
if( v2_result )
{
// skip id3v2 tag
offset = lid3_tag->v2_size + 10;
if( lid3_tag->v2_footer )
offset += 10;
}
else
offset = 0;
audio_input_stream_seek( input_stream, offset );
daf_parse_result = daf_parse( input_stream, &offset, &daf_data_info );
/*
* parse id3v1 tag
*/
if( (data_size = audio_input_stream_get_data_size( input_stream )) >= 128 )
{
// move to last 128 bytes before file end for checking id3v1 tag
audio_input_stream_seek( input_stream, data_size - 128 );
/*
* check id3v1 magic word -- "TAG"
* and parse & save data to frames
*/
v1_result = id3_tag_parse_v1_tag( input_stream, lid3_tag );
}
else
v1_result = KAL_FALSE;
mmi_trace(1,"chenhe,daf_parse_data_info,v1_result is %d",v1_result);
// copy title to info_p
if( lid3_tag->frames[ID3_FRAME_TITLE].text != NULL )
kal_wstrncpy( (kal_wchar*)info_p->title, (const kal_wchar*)lid3_tag->frames[ID3_FRAME_TITLE].text, MAX_ID3_TITLE_LEN );
// copy artist to info_p
if( lid3_tag->frames[ID3_FRAME_ARTIST].text != NULL )
kal_wstrncpy( (kal_wchar*)info_p->artist, (const kal_wchar*)lid3_tag->frames[ID3_FRAME_ARTIST].text, MAX_ID3_ARTIST_LEN );
// copy album to info_p
if( lid3_tag->frames[ID3_FRAME_ALBUM].text != NULL )
kal_wstrncpy( (kal_wchar*)info_p->album, (const kal_wchar*)lid3_tag->frames[ID3_FRAME_ALBUM].text, MAX_ID3_ALBUM_LEN );
// copy genre to info_p
if( lid3_tag->frames[ID3_FRAME_GENRE].text != NULL )
kal_wstrncpy( (kal_wchar*)info_p->genre, (const kal_wchar*)lid3_tag->frames[ID3_FRAME_GENRE].text, MAX_ID3_GENRE_LEN );
// copy year to info_p
if( lid3_tag->frames[ID3_FRAME_YEAR].text != NULL )
kal_wstrncpy( (kal_wchar*)info_p->year, (const kal_wchar*)lid3_tag->frames[ID3_FRAME_YEAR].text, MAX_ID3_YEAR_LEN );
mmi_trace(1,"chenhe,daf_parse_data_info,daf_parse_result is %d",daf_parse_result);
if( daf_parse_result )
daf_set_data_info( info_p, daf_data_info.channel_num, daf_data_info.duration, data_size, daf_data_info.bitrate, daf_data_info.samplerate );
}
