/*
- * Copyright (C) 2005-2014 Andre Noll <maan@tuebingen.mpg.de>
+ * Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
/** Audio format dependent information. */
struct afh_info {
/** The number of chunks this audio file contains. */
- long unsigned chunks_total;
+ uint32_t chunks_total;
/** The length of the audio file in seconds. */
- long unsigned seconds_total;
+ uint32_t seconds_total;
/** Audio handler specific info about the file. */
char *techinfo;
/** Id3 tags, vorbis comments, aac tags. */
struct taginfo tags;
/**
- * The table that specifies the offset of the individual pieces in
- * the current audio file.
- */
+ * The table that specifies the offset of the individual pieces in
+ * the current audio file.
+ */
uint32_t *chunk_table;
+ /** Size of the largest chunk, introduced in v0.6.0. */
+ uint32_t max_chunk_size;
/** Period of time between sending data chunks. */
struct timeval chunk_tv;
/**
* 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;
uint16_t bitrate;
};
+/** Data about the current audio file, passed from afs to server. */
+struct audio_file_data {
+ /** The open file descriptor to the current audio file. */
+ int fd;
+ /** Vss needs this for streaming. */
+ struct afh_info afhi;
+ /**
+ * Size of the largest chunk. Superseded by afhi->max_chunk_size. May
+ * be removed after v0.6.1.
+ */
+ uint32_t max_chunk_size;
+ /** Needed to get the audio file header. */
+ uint8_t audio_format_id;
+};
+
/**
- * Structure for audio format handling.
+ * Structure for audio format handling.
*
- * 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.
+ * 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 {
/** Name of the audio format. */
*/
void (*init)(struct audio_format_handler*);
/** Typical file endings for files that can be handled by this afh. */
- const char **suffixes;
+ const char * const *suffixes;
/**
* Check if this audio format handler can handle the file.
*
* \sa struct afh_info
*/
int (*get_file_info)(char *map, size_t numbytes, int fd,
- struct afh_info *afi);
+ struct afh_info *afhi);
/** Optional, used for header-rewriting. See \ref afh_get_header(). */
void (*get_header)(void *map, size_t mapsize, char **buf, size_t *len);
+ /**
+ * An audio format handler may signify support for dynamic chunks by
+ * defining ->get_chunk below. In this case the vss calls ->open() at
+ * BOS, ->get_chunk() for each chunk while streaming, and ->close() at
+ * EOS. The chunk table is not accessed at all.
+ *
+ * The function may return its (opaque) context through the last
+ * argument. The returned pointer is passed to subsequent calls to
+ * ->get_chunk() and ->close().
+ */
+ int (*open)(const void *map, size_t mapsize, void **afh_context);
+ /**
+ * Return a reference to one chunk. The returned pointer points to a
+ * portion of the memory mapped audio file. The caller must not call
+ * free() on it.
+ */
+ int (*get_chunk)(long unsigned chunk_num, void *afh_context,
+ const char **buf, size_t *len);
+ /** Deallocate the resources occupied by ->open(). */
+ void (*close)(void *afh_context);
+ /**
+ * Write audio file with altered tags, optional.
+ *
+ * The output file descriptor has been opened by the caller and must not
+ * be closed in this function.
+ */
+ int (*rewrite_tags)(const char *map, size_t mapsize, struct taginfo *tags,
+ int output_fd, const char *filename);
};
void afh_init(void);
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);
+__must_check int afh_get_chunk(long unsigned chunk_num, struct afh_info *afhi,
+ uint8_t audio_format_id, const void *map, size_t mapsize,
+ const char **buf, size_t *len, void **afh_context);
+void afh_close(void *afh_context, uint8_t audio_format_id);
int32_t afh_get_start_chunk(int32_t approx_chunk_num,
- const struct afh_info *afhi);
+ const struct afh_info *afhi, uint8_t audio_format_id);
void afh_get_header(struct afh_info *afhi, uint8_t audio_format_id,
void *map, size_t mapsize, char **buf, size_t *len);
void afh_free_header(char *header_buf, uint8_t audio_format_id);
void clear_afhi(struct afh_info *afhi);
unsigned afh_get_afhi_txt(int audio_format_num, struct afh_info *afhi, char **result);
+int afh_rewrite_tags(int audio_format_id, void *map, size_t mapsize,
+ struct taginfo *tags, int output_fd, const char *filename);
+void set_max_chunk_size(struct afh_info *afhi);
+bool afh_supports_dynamic_chunks(int audio_format_id);
projects / paraslash.git / blobdiff