spx.h


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/* SPDX-License-Identifier: GPL-2.0 */

/**
 *  \file spx.h Structures and prototypes common to the speex audio format
 *  handler and the speex decoder.
 */

/**
 * Information extracted from the first ogg packet.
 *
 * It contains tech data but not the content of the attached comment tags.
 */
struct spx_header_info {
	/** Holds the state of the decoder. */
	void *state;
	/** Extracted from header. */
	int frame_size;
	/** Current sample rate in Hz. */
	spx_int32_t sample_rate;
	/** Current bitrate used by the decoder. */
	int bitrate;
	/** Number of frames per packet, extracted from header. */
	int nframes;
	/** The number of channels of the current stream. */
	int channels;
	/** Only needed for stereo streams. */
	SpeexStereoState stereo;
	/** Must be skipped during decode. */
	int extra_headers;
	/** Narrow/wide/ultrawide band, bitstream version. */
	const SpeexMode *mode;
};

int spx_process_header(unsigned char *packet, long bytes,
		struct spx_header_info *shi);