static int mp3_seek_seconds_offset_brute(double npt)
{
int pos;
pos = (int) ((double) g_info.samples * (npt) / g_info.duration);
if (pos < 0) {
pos = 0;
}
dbg_printf(d, "%s: jumping to %d frame, offset %08x", __func__, pos,
(int) mp3info.frameoff[pos]);
dbg_printf(d, "%s: frame range (0~%u)", __func__,
(unsigned) g_info.samples);
if (pos >= g_info.samples) {
__end();
return -1;
}
if (mp3_data.use_buffer)
buffered_reader_seek(mp3_data.r, mp3info.frameoff[pos]);
else
xrIoLseek(mp3_data.fd, mp3info.frameoff[pos], PSP_SEEK_SET);
mad_stream_finish(&stream);
mad_stream_init(&stream);
if (pos <= 0)
g_play_time = 0.0;
else
g_play_time = npt;
return 0;
}
int32_t buffered_reader_read(buffered_reader_t * reader, void *buffer, uint32_t size)
{
if (!reader->cache_enabled) {
return sceIoRead(reader->handle, buffer, size);
}
if (reader->current_position == reader->length)
return 0;
if (size <= reader->position_2 - reader->current_position) {
if (reader->current_position < reader->position_1) {
if (size <= reader->position_1 - reader->current_position) {
memcpy(buffer, reader->first_buffer + (reader->current_position - reader->position_0), size);
} else {
memcpy(buffer, reader->first_buffer + (reader->current_position - reader->position_0), reader->position_1 - reader->current_position);
memcpy(buffer + (reader->position_1 - reader->current_position), reader->second_buffer, size - (reader->position_1 - reader->current_position));
}
} else {
memcpy(buffer, reader->second_buffer + (reader->current_position - reader->position_1), size);
}
reader->current_position += size;
if (reader->current_position == reader->position_2)
buffered_reader_seek(reader, reader->position_2);
return size;
} else {
uint32_t data_size;
data_size = reader->position_2 - reader->current_position;
buffered_reader_read(reader, buffer, data_size);
data_size += buffered_reader_read(reader, buffer + data_size, size - data_size);
return data_size;
}
}
static int mp3_seek_seconds_offset(double npt)
{
int new_pos;
if (npt < 0) {
npt = 0;
} else if (npt > g_info.duration) {
__end();
return -1;
}
new_pos = npt * mp3info.average_bitrate / 8;
if (new_pos < 0) {
new_pos = 0;
}
if (mp3_data.use_buffer)
buffered_reader_seek(mp3_data.r, new_pos);
else
xrIoLseek(mp3_data.fd, new_pos, PSP_SEEK_SET);
mad_stream_finish(&stream);
mad_stream_init(&stream);
if (seek_valid_frame() == -1) {
__end();
return -1;
}
if (g_info.filesize > 0) {
long cur_pos;
if (mp3_data.use_buffer)
cur_pos = buffered_reader_position(mp3_data.r);
else
cur_pos = xrIoLseek(mp3_data.fd, 0, PSP_SEEK_CUR);
g_play_time = g_info.duration * cur_pos / g_info.filesize;
} else {
g_play_time = npt;
}
if (g_play_time < 0)
g_play_time = 0;
return 0;
}
static int mp3_load(const char *spath, const char *lpath)
{
int ret;
__init();
dbg_printf(d, "%s: loading %s", __func__, spath);
g_status = ST_UNKNOWN;
mp3_data.use_buffer = true;
mp3_data.fd = xrIoOpen(spath, PSP_O_RDONLY, 0777);
if (mp3_data.fd < 0)
return -1;
g_info.filesize = xrIoLseek(mp3_data.fd, 0, PSP_SEEK_END);
xrIoLseek(mp3_data.fd, 0, PSP_SEEK_SET);
mp3_data.size = g_info.filesize;
if (g_info.filesize < 0)
return g_info.filesize;
xrIoLseek(mp3_data.fd, 0, PSP_SEEK_SET);
mad_stream_init(&stream);
mad_frame_init(&frame);
mad_synth_init(&synth);
if (use_me) {
if ((ret = me_init()) < 0) {
dbg_printf(d, "me_init failed: %d", ret);
use_me = false;
}
}
mp3info.check_crc = check_crc;
mp3info.have_crc = false;
if (use_brute_method) {
if (read_mp3_info_brute(&mp3info, &mp3_data) < 0) {
__end();
return -1;
}
} else {
if (read_mp3_info(&mp3info, &mp3_data) < 0) {
__end();
return -1;
}
}
g_info.channels = mp3info.channels;
g_info.sample_freq = mp3info.sample_freq;
g_info.avg_bps = mp3info.average_bitrate;
g_info.samples = mp3info.frames;
g_info.duration = mp3info.duration;
generic_readtag(&g_info, spath);
if (mp3_data.use_buffer) {
SceOff cur = xrIoLseek(mp3_data.fd, 0, PSP_SEEK_CUR);
xrIoClose(mp3_data.fd);
mp3_data.fd = -1;
mp3_data.r = buffered_reader_open(spath, g_io_buffer_size, 1);
if (mp3_data.r == NULL) {
__end();
return -1;
}
buffered_reader_seek(mp3_data.r, cur);
}
dbg_printf(d, "[%d channel(s), %d Hz, %.2f kbps, %02d:%02d%sframes %d%s]",
g_info.channels, g_info.sample_freq,
g_info.avg_bps / 1000,
(int) (g_info.duration / 60), (int) g_info.duration % 60,
mp3info.frameoff != NULL ? ", frame table, " : ", ",
g_info.samples, mp3info.have_crc ? ", crc passed" : "");
#ifdef _DEBUG
if (mp3info.lame_encoded) {
char lame_method[80];
char encode_msg[80];
switch (mp3info.lame_mode) {
case ABR:
STRCPY_S(lame_method, "ABR");
break;
case CBR:
STRCPY_S(lame_method, "CBR");
break;
case VBR:
SPRINTF_S(lame_method, "VBR V%1d", mp3info.lame_vbr_quality);
break;
default:
break;
}
if (mp3info.lame_str[strlen(mp3info.lame_str) - 1] == ' ')
SPRINTF_S(encode_msg, "%s%s", mp3info.lame_str, lame_method);
else
SPRINTF_S(encode_msg, "%s %s", mp3info.lame_str, lame_method);
dbg_printf(d, "[ %s ]", encode_msg);
}
#endif
ret = xAudioInit();
if (ret < 0) {
__end();
return -1;
}
ret = xAudioSetFrequency(g_info.sample_freq);
if (ret < 0) {
__end();
return -1;
}
g_buff = xAudioAlloc(0, BUFF_SIZE);
if (g_buff == NULL) {
__end();
return -1;
}
if (use_me)
xAudioSetChannelCallback(0, memp3_audiocallback, NULL);
else
xAudioSetChannelCallback(0, mp3_audiocallback, NULL);
generic_lock();
g_status = ST_LOADED;
generic_unlock();
return 0;
}