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[libav.git] / libavformat / avio.h
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1#ifndef AVIO_H
2#define AVIO_H
3
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4/* output byte stream handling */
5
0c1a9eda 6typedef int64_t offset_t;
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7
8/* unbuffered I/O */
9
10struct URLContext {
11 struct URLProtocol *prot;
12 int flags;
13 int is_streamed; /* true if streamed (no seek possible), default = false */
f031df23 14 int max_packet_size; /* if non zero, the stream is packetized with this max packet size */
de6d9b64 15 void *priv_data;
f746a046 16 char filename[1]; /* specified filename */
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17};
18
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19typedef struct URLContext URLContext;
20
21typedef struct URLPollEntry {
22 URLContext *handle;
23 int events;
24 int revents;
25} URLPollEntry;
26
27#define URL_RDONLY 0
28#define URL_WRONLY 1
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29#define URL_RDWR 2
30
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31typedef int URLInterruptCB(void);
32
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33int url_open(URLContext **h, const char *filename, int flags);
34int url_read(URLContext *h, unsigned char *buf, int size);
35int url_write(URLContext *h, unsigned char *buf, int size);
36offset_t url_seek(URLContext *h, offset_t pos, int whence);
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37int url_close(URLContext *h);
38int url_exist(const char *filename);
39offset_t url_filesize(URLContext *h);
f031df23 40int url_get_max_packet_size(URLContext *h);
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41void url_get_filename(URLContext *h, char *buf, int buf_size);
42
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43/* the callback is called in blocking functions to test regulary if
44 asynchronous interruption is needed. -EINTR is returned in this
45 case by the interrupted function. 'NULL' means no interrupt
46 callback is given. */
47void url_set_interrupt_cb(URLInterruptCB *interrupt_cb);
48
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49/* not implemented */
50int url_poll(URLPollEntry *poll_table, int n, int timeout);
51
52typedef struct URLProtocol {
53 const char *name;
54 int (*url_open)(URLContext *h, const char *filename, int flags);
55 int (*url_read)(URLContext *h, unsigned char *buf, int size);
56 int (*url_write)(URLContext *h, unsigned char *buf, int size);
57 offset_t (*url_seek)(URLContext *h, offset_t pos, int whence);
58 int (*url_close)(URLContext *h);
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59 struct URLProtocol *next;
60} URLProtocol;
61
62extern URLProtocol *first_protocol;
019ac05a 63extern URLInterruptCB *url_interrupt_cb;
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64
65int register_protocol(URLProtocol *protocol);
66
67typedef struct {
68 unsigned char *buffer;
69 int buffer_size;
70 unsigned char *buf_ptr, *buf_end;
71 void *opaque;
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72 int (*read_packet)(void *opaque, uint8_t *buf, int buf_size);
73 void (*write_packet)(void *opaque, uint8_t *buf, int buf_size);
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74 int (*seek)(void *opaque, offset_t offset, int whence);
75 offset_t pos; /* position in the file of the current buffer */
76 int must_flush; /* true if the next seek should flush */
77 int eof_reached; /* true if eof reached */
78 int write_flag; /* true if open for writing */
79 int is_streamed;
f031df23 80 int max_packet_size;
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81} ByteIOContext;
82
83int init_put_byte(ByteIOContext *s,
84 unsigned char *buffer,
85 int buffer_size,
86 int write_flag,
87 void *opaque,
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88 int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
89 void (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
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90 int (*seek)(void *opaque, offset_t offset, int whence));
91
92void put_byte(ByteIOContext *s, int b);
75bdb984 93void put_buffer(ByteIOContext *s, const unsigned char *buf, int size);
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94void put_le64(ByteIOContext *s, uint64_t val);
95void put_be64(ByteIOContext *s, uint64_t val);
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96void put_le32(ByteIOContext *s, unsigned int val);
97void put_be32(ByteIOContext *s, unsigned int val);
98void put_le16(ByteIOContext *s, unsigned int val);
99void put_be16(ByteIOContext *s, unsigned int val);
0570bf06 100void put_tag(ByteIOContext *s, const char *tag);
de6d9b64 101
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102void put_be64_double(ByteIOContext *s, double val);
103void put_strz(ByteIOContext *s, const char *buf);
75bdb984 104
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105offset_t url_fseek(ByteIOContext *s, offset_t offset, int whence);
106void url_fskip(ByteIOContext *s, offset_t offset);
107offset_t url_ftell(ByteIOContext *s);
108int url_feof(ByteIOContext *s);
109
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110#define URL_EOF (-1)
111int url_fgetc(ByteIOContext *s);
572f992e 112#ifdef __GNUC__
08f29f82 113int url_fprintf(ByteIOContext *s, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
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114#else
115int url_fprintf(ByteIOContext *s, const char *fmt, ...);
116#endif
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117char *url_fgets(ByteIOContext *s, char *buf, int buf_size);
118
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119void put_flush_packet(ByteIOContext *s);
120
121int get_buffer(ByteIOContext *s, unsigned char *buf, int size);
e15dec10 122int get_partial_buffer(ByteIOContext *s, unsigned char *buf, int size);
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123int get_byte(ByteIOContext *s);
124unsigned int get_le32(ByteIOContext *s);
0c1a9eda 125uint64_t get_le64(ByteIOContext *s);
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126unsigned int get_le16(ByteIOContext *s);
127
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128double get_be64_double(ByteIOContext *s);
129char *get_strz(ByteIOContext *s, char *buf, int maxlen);
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130unsigned int get_be16(ByteIOContext *s);
131unsigned int get_be32(ByteIOContext *s);
0c1a9eda 132uint64_t get_be64(ByteIOContext *s);
de6d9b64 133
7ac13f0c 134static inline int url_is_streamed(ByteIOContext *s)
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135{
136 return s->is_streamed;
137}
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138
139int url_fdopen(ByteIOContext *s, URLContext *h);
140int url_setbufsize(ByteIOContext *s, int buf_size);
141int url_fopen(ByteIOContext *s, const char *filename, int flags);
142int url_fclose(ByteIOContext *s);
143URLContext *url_fileno(ByteIOContext *s);
f031df23 144int url_fget_max_packet_size(ByteIOContext *s);
de6d9b64 145
0c1a9eda 146int url_open_buf(ByteIOContext *s, uint8_t *buf, int buf_size, int flags);
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147int url_close_buf(ByteIOContext *s);
148
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149int url_open_dyn_buf(ByteIOContext *s);
150int url_open_dyn_packet_buf(ByteIOContext *s, int max_packet_size);
0c1a9eda 151int url_close_dyn_buf(ByteIOContext *s, uint8_t **pbuffer);
f031df23 152
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153/* file.c */
154extern URLProtocol file_protocol;
155extern URLProtocol pipe_protocol;
156
157/* udp.c */
158extern URLProtocol udp_protocol;
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159int udp_set_remote_url(URLContext *h, const char *uri);
160int udp_get_local_port(URLContext *h);
161int udp_get_file_handle(URLContext *h);
162
163/* tcp.c */
164extern URLProtocol tcp_protocol;
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165
166/* http.c */
167extern URLProtocol http_protocol;
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168
169#endif
170