/*
   mkvmerge -- utility for splicing together matroska files
   from component media subtypes

   Distributed under the GPL
   see the file COPYING for details
   or visit http://www.gnu.org/copyleft/gpl.html

   class definitions for the raw FLAC stream reader

   Written by Moritz Bunkus <moritz@bunkus.org>.
*/

#ifndef MTX_R_FLAC_H
#define MTX_R_FLAC_H

#include "common/common_pch.h"

#include "common/mm_io.h"
#include "merge/pr_generic.h"

#if defined(HAVE_FLAC_FORMAT_H)

#include <FLAC/export.h>
#include <FLAC/stream_decoder.h>

#include "output/p_flac.h"

#define FLAC_BLOCK_TYPE_HEADERS 0
#define FLAC_BLOCK_TYPE_DATA    1

typedef struct {
  int64_t filepos;
  unsigned int type, len;
} flac_block_t;

class flac_reader_c: public generic_reader_c {
private:
  memory_cptr m_header;
  int sample_rate;
  bool metadata_parsed;
  uint64_t samples;
  std::vector<flac_block_t> blocks;
  std::vector<flac_block_t>::iterator current_block;
  FLAC__StreamMetadata_StreamInfo stream_info;

public:
  flac_reader_c(const track_info_c &ti, const mm_io_cptr &in);
  virtual ~flac_reader_c();

  virtual translatable_string_c get_format_name() const {
    return YT("FLAC");
  }

  virtual void read_headers();
  virtual file_status_e read(generic_packetizer_c *ptzr, bool force = false);
  virtual void identify();
  virtual void create_packetizer(int64_t id);
  virtual bool is_providing_timecodes() const {
    return false;
  }

  static bool probe_file(mm_io_c *in, uint64_t size);

  virtual FLAC__StreamDecoderReadStatus
  read_cb(FLAC__byte buffer[], size_t *bytes);

  virtual FLAC__StreamDecoderWriteStatus
  write_cb(const FLAC__Frame *frame, const FLAC__int32 * const data[]);

  virtual void metadata_cb(const FLAC__StreamMetadata *metadata);
  virtual void error_cb(FLAC__StreamDecoderErrorStatus status);
  virtual FLAC__StreamDecoderSeekStatus seek_cb(uint64_t new_pos);
  virtual FLAC__StreamDecoderTellStatus tell_cb(uint64_t &absolute_byte_offset);
  virtual FLAC__StreamDecoderLengthStatus length_cb(uint64_t &stream_length);
  virtual FLAC__bool eof_cb();

protected:
  virtual bool parse_file();
};

#else  // HAVE_FLAC_FORMAT_H

class flac_reader_c {
public:
  static bool probe_file(mm_io_c *in, uint64_t size);
};

#endif // HAVE_FLAC_FORMAT_H

#endif  // MTX_R_FLAC_H
