/**
*@internal
* Gets the GnMusicIdFileInfo object at the requested position
* @param pos [in] the index of obect to retrieve
*@endinternal
*/
GnMusicIdFileInfo
get_data(gnsdk_uint32_t pos) const
{
gnsdk_musicidfile_fileinfo_handle_t fileinfo_handle = GNSDK_NULL;
if ( pos < GN_UINT32_MAX)
{
gnsdk_error_t error = gnsdk_musicidfile_query_fileinfo_get_by_index(weakhandle_, pos-1, &fileinfo_handle);
if (GNSDKERR_SEVERE(error)) { throw GnError();}
if (!error)
return GnMusicIdFileInfo(weakhandle_, fileinfo_handle);
}
return GnMusicIdFileInfo();
}
static gnsdk_void_t GNSDK_CALLBACK_API
_get_fingerprint_callback(
const gnsdk_void_t* user_data,
gnsdk_musicidfile_query_handle_t query_handle,
gnsdk_musicidfile_fileinfo_handle_t fileinfo_handle,
gnsdk_uint32_t current_file,
gnsdk_uint32_t total_files,
gnsdk_bool_t* p_abort
)
{
gnsdk_error_t error = GNSDK_SUCCESS;
gnsdk_bool_t complete = GNSDK_FALSE;
gnsdk_cstr_t file = GNSDK_NULL;
size_t read = 0;
FILE* p_file = NULL;
char pcm_audio[2048] = {0};
/* get the file */
error = gnsdk_musicidfile_fileinfo_metadata_get(fileinfo_handle, GNSDK_MUSICIDFILE_FILEINFO_VALUE_FILENAME, &file, GNSDK_NULL);
if (GNSDK_SUCCESS != error)
{
_display_error(__LINE__, "gnsdk_musicidfile_fileinfo_metadata_get() failed", error);
return;
}
/* check file for existence */
p_file = fopen(file, "rb");
if (p_file == NULL)
{
printf("\n\n!!!!Failed to open input file: %s!!!\n\n", file);
return;
}
/* skip the wave header (first 44 bytes). we know the format of our sample files */
if (0 != fseek(p_file, 44, SEEK_SET))
{
GNSDK_ASSERT(0);
fclose(p_file);
return;
}
/* initialize the fingerprinter
Note: Our sample files are non-standard 11025 Hz 16-bit mono to save on file size */
error = gnsdk_musicidfile_fileinfo_fingerprint_begin(
fileinfo_handle,
11025,
16,
1
);
if (GNSDK_SUCCESS != error)
{
_display_error(__LINE__, "gnsdk_musicidfile_fileinfo_fingerprint_begin() failed", error);
fclose(p_file);
return;
}
read = fread(pcm_audio, sizeof(char), 2048, p_file);
while (read > 0)
{
/* write audio to the fingerprinter */
error = gnsdk_musicidfile_fileinfo_fingerprint_write(
fileinfo_handle,
pcm_audio,
read,
&complete
);
if (GNSDK_SUCCESS != error)
{
if (GNSDKERR_SEVERE(error)) /* 'aborted' warnings could come back from write which should be expected */
_display_error(__LINE__, "gnsdk_musicidfile_fileinfo_fingerprint_write() failed", error);
break;
}
/* does the fingerprinter have enough audio? */
if (GNSDK_TRUE == complete)
{
break;
}
read = fread(pcm_audio, sizeof(char), 2048, p_file);
}
fclose(p_file);
/* signal that we are done */
if (GNSDK_SUCCESS == error)
{
error = gnsdk_musicidfile_fileinfo_fingerprint_end(
fileinfo_handle
);
if (GNSDK_SUCCESS != error)
{
_display_error(__LINE__, "gnsdk_musicidfile_fileinfo_fingerprint_end() failed", error);
}
}
if (GNSDK_TRUE != complete)
{
/* fingerprinter doesn't have enough data! */
printf("Warning: input file does not contain enough data to generate a fingerprint:\n%s\n", file);
}
/* this app doesn't allow a user to cancel but you could use this parameter
to allow cancellation of the query */
*p_abort = GNSDK_FALSE;
/* This is to quiet compiler warnings about un-used parameters in this simplified sample callback. */
user_data = 0;
current_file = 0;
total_files = 0;
(void)query_handle;
}
/* This function simulates streaming audio into the Query handle to generate the query fingerprint */
static int
_set_query_fingerprint(
gnsdk_musicid_query_handle_t query_handle
)
{
gnsdk_error_t error = GNSDK_SUCCESS;
gnsdk_bool_t* p_blocks_complete = NULL;
gnsdk_cstr_t file = GNSDK_NULL;
size_t read = 0;
FILE* p_file = NULL;
char pcm_audio[2048] = {0};
int rc = 0;
file = "data/05-Hummingbird-sample.wav";
/* check file for existence */
p_file = fopen(file, "rb");
if (p_file == NULL)
{
printf("\n\n!!!!Failed to open input file: %s!!!\n\n", file);
return -1;
}
/* skip the wave header (first 44 bytes). we know the format of our sample files */
if (0 != fseek(p_file, 44, SEEK_SET))
{
fclose(p_file);
return -1;
}
/* initialize the fingerprinter
Note: The sample file shipped is a 44100Hz 16-bit stereo (2 channel) wav file */
error = gnsdk_musicid_query_fingerprint_begin(
query_handle,
GNSDK_MUSICID_FP_DATA_TYPE_GNFPX,
44100,
16,
2
);
if (GNSDK_SUCCESS != error)
{
_display_error(__LINE__, "gnsdk_musicidfile_fileinfo_fingerprint_begin()", error);
fclose(p_file);
return -1;
}
read = fread(pcm_audio, sizeof(char), 2048, p_file);
while (read > 0)
{
/* write audio to the fingerprinter */
error = gnsdk_musicid_query_fingerprint_write(
query_handle,
pcm_audio,
read,
p_blocks_complete
);
if (GNSDK_SUCCESS != error)
{
if (GNSDKERR_SEVERE(error)) /* 'aborted' warnings could come back from write which should be expected */
{
_display_error(__LINE__, "gnsdk_musicidfile_fileinfo_fingerprint_write()", error);
}
rc = -1;
break;
}
read = fread(pcm_audio, sizeof(char), 2048, p_file);
}
fclose(p_file);
/*signal that we are done*/
if (GNSDK_SUCCESS == error)
{
error = gnsdk_musicid_query_fingerprint_end(query_handle);
if (GNSDK_SUCCESS != error)
{
_display_error(__LINE__, "gnsdk_musicidfile_fileinfo_fingerprint_end()", error);
}
}
return rc;
}
