int get_mp3_info (char *file_name, tihm_t *tihm) {
struct mp3_file mp3;
if (mp3_open (file_name, &mp3) < 0) {
mp3_close (&mp3); /* Make sure everything is cleaned up */
return -1;
}
if (mp3_scan (&mp3) < 0) {
mp3_close (&mp3);
return -1;
}
mp3_close (&mp3);
tihm->bitrate = mp3.bitrate;
tihm->vbr = mp3.vbr;
tihm->samplerate = mp3.samplerate;
tihm->time = mp3.duration;
tihm->size = mp3.file_size;
tihm->mod_date = mp3.mod_date;
tihm->creation_date = mp3.mod_date;
tihm->type = string_to_int ("MP3 ");
tihm->is_video = 0;
return 0;
}
static int
mp3_open_fore(struct inode *inode, struct file *fp)
{
int ret;
printk("Hello! mp3_open_fore, backgroundUseFlag = %d, foregroundUseFlag = %d\n", backgroundUseFlag, foregroundUseFlag);
if(backgroundUseFlag)
{
// Send command to the Epics to Stop
pnx0106_epics_set_exit_decoder(1);
// wait for global use flag to get set to 0
while(backgroundUseFlag)
{
pnx0106_epics_sleep(10);
}
}
foregroundUseFlag++;
//return 0;
ret = mp3_open(inode, fp);
if(ret)
{
foregroundUseFlag--;
}
else
{
/*
* Allocate foreground buffer for decoder
*/
mp3_bufsize = PAGE_ALIGN(sizeof(e7b_mp3_buffer)); /* size must be multiple of PAGE_SIZE for mmap */
TRACE(1, "mp3_open: alloc %d(%d)\n", mp3_bufsize, sizeof(e7b_mp3_buffer));
mp3_buff = pnx0106_epics_alloc_coherent(NULL, mp3_bufsize, &mp3_buff_bus, 0);
if (!mp3_buff)
{
pnx0106_epics_decoder_release();
return -ENOMEM;
}
printk("FORE : mp3_buff = 0x%x, mp3_bufsize = %d, \n",mp3_buff, mp3_bufsize);
}
return ret;
}
static int
mp3_open_back(struct inode *inode, struct file *fp)
{
int ret;
printk("Hello! mp3_open_back, backgroundUseFlag = %d, foregroundUseFlag = %d\n", backgroundUseFlag, foregroundUseFlag);
while(foregroundUseFlag)
{
// wait for foreground use flag to get set to 0
pnx0106_epics_sleep(10);
}
pnx0106_epics_alloc_backup_buffer();
backgroundUseFlag++;
ret = mp3_open(inode, fp);
if(ret)
{
backgroundUseFlag--;
if(!backgroundUseFlag)
{
pnx0106_epics_free_backup_buffer();
}
}
else
{
/*
* Allocate background buffer for decoder
*/
mp3_bufsize = PAGE_ALIGN(sizeof(e7b_mp3_buffer)); /* size must be multiple of PAGE_SIZE for mmap */
TRACE(1, "mp3_open: alloc %d(%d)\n", mp3_bufsize, sizeof(e7b_mp3_buffer));
mp3_buff = pnx0106_epics_alloc_coherent(NULL, mp3_bufsize, &mp3_buff_bus, 0);
if (!mp3_buff)
{
pnx0106_epics_decoder_release();
return -ENOMEM;
}
printk("BACK : mp3_buff = 0x%x, mp3_bufsize = %d, \n",mp3_buff, mp3_bufsize);
}
return ret;
}
static void
mp3_decode(struct decoder *decoder, struct input_stream *input_stream)
{
struct mp3_data data;
GError *error = NULL;
struct tag *tag = NULL;
struct audio_format audio_format;
if (!mp3_open(input_stream, &data, decoder, &tag)) {
if (decoder_get_command(decoder) == DECODE_COMMAND_NONE)
g_warning
("Input does not appear to be a mp3 bit stream.\n");
return;
}
if (!audio_format_init_checked(&audio_format,
data.frame.header.samplerate,
SAMPLE_FORMAT_S24_P32,
MAD_NCHANNELS(&data.frame.header),
&error)) {
g_warning("%s", error->message);
g_error_free(error);
if (tag != NULL)
tag_free(tag);
mp3_data_finish(&data);
return;
}
decoder_initialized(decoder, &audio_format,
data.input_stream->seekable, data.total_time);
if (tag != NULL) {
decoder_tag(decoder, input_stream, tag);
tag_free(tag);
}
while (mp3_read(&data)) ;
mp3_data_finish(&data);
}
static void
mp3_decode(struct decoder *decoder, struct input_stream *input_stream)
{
struct mp3_data data;
struct tag *tag = NULL;
struct replay_gain_info *replay_gain_info = NULL;
struct audio_format audio_format;
if (!mp3_open(input_stream, &data, decoder, &tag, &replay_gain_info)) {
if (decoder_get_command(decoder) == DECODE_COMMAND_NONE)
g_warning
("Input does not appear to be a mp3 bit stream.\n");
return;
}
mp3_audio_format(&data, &audio_format);
decoder_initialized(decoder, &audio_format,
data.input_stream->seekable, data.total_time);
if (tag != NULL) {
decoder_tag(decoder, input_stream, tag);
tag_free(tag);
}
while (mp3_read(&data, &replay_gain_info)) ;
if (replay_gain_info)
replay_gain_info_free(replay_gain_info);
if (decoder_get_command(decoder) == DECODE_COMMAND_SEEK &&
data.mute_frame == MUTEFRAME_SEEK)
decoder_command_finished(decoder);
mp3_data_finish(&data);
}
