int calculate_track_dr(const char *filename, struct track_info *t, int number) {
struct stream_context sc;
struct dr_meter meter;
int err;
meter_init(&meter);
err = sc_open(&sc, filename);
if (err < 0) { return print_av_error("sc_open", err); }
if (debug) {
printf("DEBUG: Codec: %s\n", avcodec_get_name(sc_get_codec_id(&sc)));
}
int stream_index = err = av_find_best_stream(
sc.format_ctx, AVMEDIA_TYPE_AUDIO, -1, -1, NULL, 0);
if (err < 0) { print_av_error("av_find_best_stream", err); goto cleanup; }
err = sc_start_stream(&sc, stream_index);
if (err < 0) { print_av_error("sc_start_stream", err); goto cleanup; }
t->artist = strdup(sc_get_metadata(&sc, "artist"));
t->album = strdup(sc_get_metadata(&sc, "album"));
t->tracknumber = strdup(sc_get_metadata(&sc, "track"));
t->title = strdup(sc_get_metadata(&sc, "title"));
AVCodecParameters *codecpar = sc_get_codec_parameters(&sc);
err = meter_start(&meter, codecpar->channels, codecpar->sample_rate, codecpar->format);
if (err) { goto cleanup; }
size_t fragment = 0;
int throbbler_stage = 0;
while (!sc_eof(&sc)) {
err = sc_get_next_frame(&sc);
if (err < 0) {
print_av_error("sc_get_next_frame", err);
goto cleanup;
}
err = meter_feed(&meter, sc_get_buf(&sc), sc_get_samples(&sc));
if (err) { goto cleanup; }
if (fragment < meter.fragment) {
fragment = meter.fragment;
if ((throbbler_stage % 4) == 0) {
fprintf(stderr, "\033[1K\033[1G"
"Analyzing track %i... "
"%c %2zu:%02zu ",
number,
throbbler[throbbler_stage / 4],
(fragment * 3) / 60,
(fragment * 3) % 60);
}
throbbler_stage += 1;
throbbler_stage %= 16;
}
}
fprintf(stderr, "\033[1K\033[1G");
meter_finish(&meter, t);
cleanup:
meter_free(&meter);
sc_close(&sc);
if (err < 0) {
return err;
}
return 0;
}
int do_calculate_dr(const char *filename) {
struct stream_context sc;
struct dr_meter meter;
int err;
meter_init(&meter);
err = sc_open(&sc, filename);
if (err < 0) { return print_av_error("sc_open", err); }
int stream_index = err = av_find_best_stream(
sc.format_ctx, AVMEDIA_TYPE_AUDIO, -1, -1, NULL, 0);
if (err < 0) { print_av_error("av_find_best_stream", err); goto cleanup; }
err = sc_start_stream(&sc, stream_index);
if (err < 0) { print_av_error("sc_start_stream", err); goto cleanup; }
// Print out the stream info
AVCodecContext *codec_ctx = sc_get_codec(&sc);
char codecinfobuf[256];
avcodec_string(codecinfobuf, sizeof(codecinfobuf), codec_ctx, 0);
fprintf(stderr, "%.256s\n", codecinfobuf);
err = meter_start(&meter, codec_ctx->channels, codec_ctx->sample_rate, codec_ctx->sample_fmt);
if (err) { goto cleanup; }
fprintf(stderr, "Collecting fragments information...\n");
size_t fragment = 0;
int throbbler_stage = 0;
while (!sc_eof(&sc)) {
err = sc_get_next_frame(&sc);
if (err < 0) {
print_av_error("sc_get_next_frame", err);
goto cleanup;
}
err = meter_feed(&meter, sc.buf, sc.buf_size);
if (err) { goto cleanup; }
if (fragment < meter.fragment) {
fragment = meter.fragment;
if ((throbbler_stage % 4) == 0) {
fprintf(stderr, "\033[1K\033[1G %c %2i:%02i ",
throbbler[throbbler_stage / 4],
(fragment * 3) / 60,
(fragment * 3) % 60);
}
throbbler_stage += 1;
throbbler_stage %= 16;
}
}
meter_finish(&meter);
cleanup:
meter_free(&meter);
sc_close(&sc);
if (err < 0) {
return err;
}
return 0;
}