com_stat(): Be more anal in checking command line options.

[paraslash.git] / afh.h

diff --git a/afh.h b/afh.h
index 403b7a55e2e62ade3b8a97a1cb2ec2c1bdc06fa4..35cc7ef102644f1c394db52cd6cd21af51395c21 100644 (file)
--- a/afh.h
+++ b/afh.h
@@ -1,19 +1,7 @@
 /*
 /*

- * Copyright (C) 2005-2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>

  *
  *

- *     This program is free software; you can redistribute it and/or modify
- *     it under the terms of the GNU General Public License as published by
- *     the Free Software Foundation; either version 2 of the License, or
- *     (at your option) any later version.
- *
- *     This program is distributed in the hope that it will be useful,
- *     but WITHOUT ANY WARRANTY; without even the implied warranty of
- *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *     GNU General Public License for more details.
- *
- *     You should have received a copy of the GNU General Public License
- *     along with this program; if not, write to the Free Software
- *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.

  */
 
 /** \file afh.h structures for audio format handling (para_server) */
  */
 
 /** \file afh.h structures for audio format handling (para_server) */


@@ -21,105 +9,100 @@
 /** \cond */
 #ifdef HAVE_OGGVORBIS
 #define OV_AUDIO_FORMAT " ogg"
 /** \cond */
 #ifdef HAVE_OGGVORBIS
 #define OV_AUDIO_FORMAT " ogg"

-#define OV_AUDIO_FORMAT_ARRAY , "ogg"

 #else
 #define OV_AUDIO_FORMAT ""
 #else
 #define OV_AUDIO_FORMAT ""

-#define OV_AUDIO_FORMAT_ARRAY

 #endif
 
 #ifdef HAVE_FAAD
 #define AAC_AUDIO_FORMAT " aac"
 #endif
 
 #ifdef HAVE_FAAD
 #define AAC_AUDIO_FORMAT " aac"

-#define AAC_AUDIO_FORMAT_ARRAY , "aac"

 #else
 #define AAC_AUDIO_FORMAT ""
 #else
 #define AAC_AUDIO_FORMAT ""

-#define AAC_AUDIO_FORMAT_ARRAY

 #endif
 
 #define SUPPORTED_AUDIO_FORMATS "mp3" OV_AUDIO_FORMAT AAC_AUDIO_FORMAT
 #endif
 
 #define SUPPORTED_AUDIO_FORMATS "mp3" OV_AUDIO_FORMAT AAC_AUDIO_FORMAT

-#define SUPPORTED_AUDIO_FORMATS_ARRAY "mp3" OV_AUDIO_FORMAT_ARRAY \
-       AAC_AUDIO_FORMAT_ARRAY, NULL

 
 /** \endcond */
 
 
 /** \endcond */
 

+/** Audio format dependent information. */
+struct afh_info {
+       /** The number of chunks this audio file contains. */
+       long unsigned chunks_total;
+       /** The length of the audio file in seconds. */
+       long unsigned seconds_total;
+       /** A string that gets filled in by the audio format handler. */
+       char *info_string;
+       /**
+        * The table that specifies the offset of the individual pieces in
+        * the current audio file.
+        */
+       uint32_t *chunk_table;
+       /** Period of time between sending data chunks. */
+       struct timeval chunk_tv;
+       /** End of file timeout - Do not load new audio file until this time. */
+       struct timeval eof_tv;
+       /**
+        * The position of the header within the audio file. Ignored if \a
+        * header_len equals zero.
+        */
+       uint32_t header_offset;
+       /**
+        * The header is needed by senders in case a new client connects in the
+        * middle of the stream. The length of the header defaults to zero
+        * which means that this audio format does not need any special header
+        * treatment. The audio format handler does not need to set this to
+        * zero in this case.
+        */
+       uint32_t header_len;
+       /** The number of channels. */
+       uint8_t channels;
+       /** Frequency in Hz. */
+       uint16_t frequency;
+       /** Exact meaning depends on audio format. */
+       uint16_t bitrate;
+};
+

 /**
 /**

- * structure for audio format handling
+ *  Structure for audio format handling.

  *
  *

- * There's exactly one such struct for each supported audio format. Initially,
- * only \a name and \a init are defined. During the startup process,
- * para_server calls the \a init function of each audio format handler which is
- * expected to fill in all the other function pointers.
+ *  There's one such struct for each supported audio format. Initially, only \a
+ *  name and \a init are defined. During the startup process, para_server calls
+ *  the \a init function of each audio format handler which is expected to fill
+ *  in the other part of this struct.

  */
 struct audio_format_handler {
  */
 struct audio_format_handler {

-       /**
-        * name of the audio format
-        */
+       /** Name of the audio format. */

        const char *name;
        /**
        const char *name;
        /**

-        * typical file endings for files that can be handled by this afh.
-        */
-       const char **suffixes;
-       /**
-        * pointer to the audio format handler's init function
+        * Pointer to the audio format handler's init function.

         *
         * Must initialize all function pointers and is assumed to succeed.
         */
        void (*init)(struct audio_format_handler*);
         *
         * Must initialize all function pointers and is assumed to succeed.
         */
        void (*init)(struct audio_format_handler*);

+       /** Typical file endings for files that can be handled by this afh. */
+       const char **suffixes;

        /**
        /**

-        * period of time between sending data chunks
-       */
-       struct timeval chunk_tv; /* length of one chunk of data */
-       /**
-        * end of file timeout - do not load new audio file until this time
-        *
-       */
-       struct timeval eof_tv; /* timeout on eof */
-       /**
-        * Pointer to the optional get-header function.
-        *
-        * This is called from a sender in case a new client connects in the middle of
-        * the stream.  The audio format handler may set this to NULL to indicate that
-        * this audio format does not need any special header treatment.  If non-NULL,
-        * the function it points to must return a pointer to a buffer holding the
-        * current audio file header, together with the header length.
-       */
-       char *(*get_header_info)(int *header_len);
-       /**
-        * check if this audio format handler can handle the file
-        *
-        * This is a  pointer to a function returning whether a given file is valid for
-        * this audio format. A negative return value indicates that this audio format
-        * handler did not recognize the given file. On success, the function is
-        * expected to return a positive value and to fill in \arg info_str, \arg
-        * chunks and \arg seconds appropriately.
-       */
-       int (*get_file_info)(FILE *audio_file, char *info_str,
-               long unsigned *chunks, int *seconds);
-       /**
-        * cleanup function of this audio format handler
-        *
-        * This close function should deallocate any resources
-        * associated with the current audio file. In particular, it is responsible
-        * for closing the file handle. It is assumed to succeed.
-       */
-       void (*close_audio_file)(void);
-       /**
-        * jump to another position in the current audio file
-        *
-        * This is called if a client issued the ff or jmp command with \a request
-        * being the number of the next chunk that should be sent out. Must return a
-        * positive value on success and a negative value on errors.
-       */
-       int (*reposition_stream)(long unsigned request);
-       /**
-        * function responsible for reading one data chunk.
+        * Check if this audio format handler can handle the file.

         *
         *

-        * \a read_chunk() must return a pointer to the next chunk of data that should
-        * be sent out, or \p NULL on errors or if the end of the file was encountered.
+        * This is a  pointer to a function returning whether a given file is
+        * valid for this audio format. A negative return value indicates that
+        * this audio format handler is unable to decode the given file. On
+        * success, the function must return a positive value and fill in the
+        * given struct afh_info.

         *
         *

-        * If it returns non-NULL, \a len must contain the length of the returned
-        * buffer (which may be zero if nothing has to be sent for some reason).
-        * Otherwise, \a len is used to distinguish between the eof and the error case:
-        * It must be zero in the eof case, or negative if an error occcured.
-       */
-       char * (*read_chunk)(long unsigned chunk_num, ssize_t *len);
+        * \sa struct afh_info
+        */
+       int (*get_file_info)(char *map, size_t numbytes, int fd,
+               struct afh_info *afi);

 };
 };

+
+void afh_init(void);
+int guess_audio_format(const char *name);
+int compute_afhi(const char *path, char *data, size_t size,
+       int fd, struct afh_info *afhi);
+const char *audio_format_name(int);
+void afh_get_chunk(long unsigned chunk_num, struct afh_info *afhi,
+               void *map, const char **buf, size_t *len);
+uint32_t afh_get_largest_chunk_size(struct afh_info *afhi);
+void afh_get_header(struct afh_info *afhi, void *map, const char **buf, size_t *len);
+char *make_taginfo(char *title, char *artist, char *album, char *year,
+               char *comment);