C++ (Cpp) ogg_stream_type_detect Beispiele

Beispiel #1

Datei: flac_decoder_plugin.c Projekt: mvasilkov/mpd

static void
oggflac_decode(struct decoder *decoder, struct input_stream *input_stream)
{
	if (ogg_stream_type_detect(input_stream) != FLAC)
		return;

	/* rewind the stream, because ogg_stream_type_detect() has
	   moved it */
	input_stream_lock_seek(input_stream, 0, SEEK_SET, NULL);

	flac_decode_internal(decoder, input_stream, true);
}

Beispiel #2

Datei: vorbis_decoder_plugin.c Projekt: Acidburn0zzz/mpd

/* public */
static void
vorbis_stream_decode(struct decoder *decoder,
		     struct input_stream *input_stream)
{
	GError *error = NULL;
	OggVorbis_File vf;
	struct vorbis_input_stream vis;
	struct audio_format audio_format;
	float total_time;
	int current_section;
	int prev_section = -1;
	long ret;
	char chunk[OGG_CHUNK_SIZE];
	long bitRate = 0;
	long test;
	const vorbis_info *vi;
	enum decoder_command cmd = DECODE_COMMAND_NONE;

	if (ogg_stream_type_detect(input_stream) != VORBIS)
		return;

	/* rewind the stream, because ogg_stream_type_detect() has
	   moved it */
	input_stream_lock_seek(input_stream, 0, SEEK_SET, NULL);

	if (!vorbis_is_open(&vis, &vf, decoder, input_stream))
		return;

	vi = ov_info(&vf, -1);
	if (vi == NULL) {
		g_warning("ov_info() has failed");
		return;
	}

	if (!audio_format_init_checked(&audio_format, vi->rate,
				       SAMPLE_FORMAT_S16,
				       vi->channels, &error)) {
		g_warning("%s", error->message);
		g_error_free(error);
		return;
	}

	total_time = ov_time_total(&vf, -1);
	if (total_time < 0)
		total_time = 0;

	decoder_initialized(decoder, &audio_format, vis.seekable, total_time);

	do {
		if (cmd == DECODE_COMMAND_SEEK) {
			double seek_where = decoder_seek_where(decoder);
			if (0 == ov_time_seek_page(&vf, seek_where)) {
				decoder_command_finished(decoder);
			} else
				decoder_seek_error(decoder);
		}

		ret = ov_read(&vf, chunk, sizeof(chunk),
			      OGG_DECODE_USE_BIGENDIAN, 2, 1, &current_section);
		if (ret == OV_HOLE) /* bad packet */
			ret = 0;
		else if (ret <= 0)
			/* break on EOF or other error */
			break;

		if (current_section != prev_section) {
			char **comments;

			vi = ov_info(&vf, -1);
			if (vi == NULL) {
				g_warning("ov_info() has failed");
				break;
			}

			if (vi->rate != (long)audio_format.sample_rate ||
			    vi->channels != (int)audio_format.channels) {
				/* we don't support audio format
				   change yet */
				g_warning("audio format change, stopping here");
				break;
			}

			comments = ov_comment(&vf, -1)->user_comments;
			vorbis_send_comments(decoder, input_stream, comments);

			struct replay_gain_info rgi;
			if (vorbis_comments_to_replay_gain(&rgi, comments))
				decoder_replay_gain(decoder, &rgi);

			prev_section = current_section;
		}

		if ((test = ov_bitrate_instant(&vf)) > 0)
			bitRate = test / 1000;

		cmd = decoder_data(decoder, input_stream,
				   chunk, ret,
				   bitRate);
	} while (cmd != DECODE_COMMAND_STOP);

	ov_clear(&vf);
}