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#include "config.h"
#include <oggplay/oggplay.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
static int n_frames = 0;
typedef struct {
int last_overrun;
int worst_overrun;
int overrun_sum;
int * histogram;
} overrunInfo;
static overrunInfo *overruns = NULL;
int
dump_streams_callback(OggPlay *player, int num_records,
OggPlayCallbackInfo **info, void *user) {
int i;
int available;
int required;
int overrun;
OggPlayDataHeader ** headers;
if (overruns == NULL) {
overruns = malloc (sizeof (overrunInfo) * num_records);
for (i = 0; i < num_records; i++) {
overruns[i].last_overrun = 0;
overruns[i].worst_overrun = 0;
overruns[i].overrun_sum = 0;
overruns[i].histogram = malloc (sizeof (int));
overruns[i].histogram[0] = 0;
}
}
for (i = 0; i < num_records; i++)
{
int j;
required = oggplay_callback_info_get_required(info[i]);
available = oggplay_callback_info_get_available(info[i]);
headers = oggplay_callback_info_get_headers(info[i]);
overrun = 0;
for (j = required; j < available; j++) {
/*OggPlayDataHeader *header;*/
overrun += oggplay_callback_info_get_record_size(headers[j]);
}
if (overrun > overruns[i].worst_overrun) {
int j;
overruns[i].histogram = realloc (overruns[i].histogram,
(overrun + 1) * sizeof (int));
for (j = overruns[i].worst_overrun + 1; j <= overrun; j++) {
overruns[i].histogram[j] = 0;
}
overruns[i].worst_overrun = overrun;
}
overruns[i].overrun_sum += overrun;
overruns[i].histogram[overrun] += 1;
overruns[i].last_overrun = overrun;
printf("track %d required %d times [", i, required);
for (j = 0; j < required; j++) {
if (j > 0) {
printf(", ");
}
printf("%ld", oggplay_callback_info_get_presentation_time(headers[j]));
}
printf("] ");
}
printf("\n");
n_frames += 1;
return 0;
}
int
main (int argc, char * argv[]) {
OggPlay * player;
OggPlayReader * reader;
int i;
if (argc < 2) {
printf ("please provide a filename\n");
exit (1);
}
reader = oggplay_file_reader_new(argv[1]);
player = oggplay_open_with_reader(reader);
if (player == NULL) {
printf ("could not initialise oggplay with this file\n");
exit (1);
}
printf ("Reading %d tracks ...\n", oggplay_get_num_tracks (player));
for (i = 0; i < oggplay_get_num_tracks (player); i++) {
printf("\t%s: Track %d ...", oggplay_get_track_typename (player, i), i);
if (oggplay_get_track_type (player, i) == OGGZ_CONTENT_THEORA) {
oggplay_set_callback_num_frames (player, i, 1);
}
/*
if (oggplay_get_track_type (player, i) == OGGZ_CONTENT_VORBIS) {
oggplay_set_offset(player, i, 1000LL);
}
*/
if (oggplay_set_track_active(player, i) < 0) {
printf(" Could not set this track active!\n");
} else {
printf(" ok ...\n");
}
}
oggplay_set_data_callback(player, dump_streams_callback, NULL);
oggplay_start_decoding(player);
printf("Total %d frames.\n", n_frames);
if (n_frames == 0)
return 0;
for (i = 0; i < oggplay_get_num_tracks (player); i++) {
int j;
long long mse = 0;
double average = (double)(overruns[i].overrun_sum)/n_frames;
double hist_bucket_size;
double cur_bucket;
if (overruns[i].worst_overrun > 30)
hist_bucket_size = overruns[i].worst_overrun/20.0;
else
hist_bucket_size = 1.0;
printf("\n%s: Track %d\n", oggplay_get_track_typename (player, i), i);
printf("\tWorst overrun: %d frames\n", overruns[i].worst_overrun);
printf("\tAverage overrun: %.3f frames\n", average);
printf("\tHistogram bucket size: %.3f\n", hist_bucket_size);
printf("\tHistogram:");
for
(
cur_bucket = 0;
cur_bucket <= overruns[i].worst_overrun;
cur_bucket += hist_bucket_size
) {
int sum = 0;
//printf(" (%f-%f)", cur_bucket, cur_bucket + hist_bucket_size);
for
(
j = ceil(cur_bucket);
j < (cur_bucket + hist_bucket_size) && j <= overruns[i].worst_overrun;
j++
) {
sum += overruns[i].histogram[j];
}
printf(" %d", sum);
}
for (j = 0; j <= overruns[i].worst_overrun; j++) {
mse += (average - j) * (average - j) * overruns[i].histogram[j];
}
printf("\n");
printf("\tSD of overrun: %f\n", sqrt(mse/n_frames));
}
return 0;
}
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