Initial revision

Originally committed as revision 5 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 151 insertions, 0 deletions

diff --git a/libav/avio.h b/libav/avio.h
new file mode 100644
index 0000000000..a3e11b61aa
--- /dev/null
+++ b/libav/avio.h
@@ -0,0 +1,151 @@
+/* output byte stream handling */
+
+typedef long long offset_t;
+
+/* unbuffered I/O */
+
+struct URLContext {
+    struct URLProtocol *prot;
+    int flags;        
+    int is_streamed;  /* true if streamed (no seek possible), default = false */
+    int packet_size;
+    void *priv_data;
+};
+
+typedef struct URLFormat {
+    char format_name[32];
+    int sample_rate;
+    int frame_rate;
+    int channels;
+    int height;
+    int width;
+    int pix_fmt;
+} URLFormat;
+
+typedef struct URLContext URLContext;
+
+typedef struct URLPollEntry {
+    URLContext *handle;
+    int events;
+    int revents;
+} URLPollEntry;
+
+#define URL_RDONLY 0
+#define URL_WRONLY 1
+int url_open(URLContext **h, const char *filename, int flags);
+int url_read(URLContext *h, unsigned char *buf, int size);
+int url_write(URLContext *h, unsigned char *buf, int size);
+offset_t url_seek(URLContext *h, offset_t pos, int whence);
+int url_getformat(URLContext *h, URLFormat *f);
+int url_close(URLContext *h);
+int url_exist(const char *filename);
+offset_t url_filesize(URLContext *h);
+/* not implemented */
+int url_poll(URLPollEntry *poll_table, int n, int timeout);
+
+typedef struct URLProtocol {
+    const char *name;
+    int (*url_open)(URLContext *h, const char *filename, int flags);
+    int (*url_read)(URLContext *h, unsigned char *buf, int size);
+    int (*url_write)(URLContext *h, unsigned char *buf, int size);
+    offset_t (*url_seek)(URLContext *h, offset_t pos, int whence);
+    int (*url_close)(URLContext *h);
+    /* get precise information about the format, if available. return
+       -ENODATA if not available */
+    int (*url_getformat)(URLContext *h, URLFormat *f);
+    struct URLProtocol *next;
+} URLProtocol;
+
+extern URLProtocol *first_protocol;
+
+int register_protocol(URLProtocol *protocol);
+
+typedef struct {
+    unsigned char *buffer;
+    int buffer_size;
+    unsigned char *buf_ptr, *buf_end;
+    void *opaque;
+    int (*read_packet)(void *opaque, UINT8 *buf, int buf_size);
+    void (*write_packet)(void *opaque, UINT8 *buf, int buf_size);
+    int (*seek)(void *opaque, offset_t offset, int whence);
+    offset_t pos; /* position in the file of the current buffer */
+    int must_flush; /* true if the next seek should flush */
+    int eof_reached; /* true if eof reached */
+    int write_flag;  /* true if open for writing */
+    int is_streamed;
+    int packet_size;
+} ByteIOContext;
+
+int init_put_byte(ByteIOContext *s,
+                  unsigned char *buffer,
+                  int buffer_size,
+                  int write_flag,
+                  void *opaque,
+                  int (*read_packet)(void *opaque, UINT8 *buf, int buf_size),
+                  void (*write_packet)(void *opaque, UINT8 *buf, int buf_size),
+                  int (*seek)(void *opaque, offset_t offset, int whence));
+
+void put_byte(ByteIOContext *s, int b);
+void put_buffer(ByteIOContext *s, unsigned char *buf, int size);
+void put_le64(ByteIOContext *s, unsigned long long val);
+void put_be64(ByteIOContext *s, unsigned long long val);
+void put_le32(ByteIOContext *s, unsigned int val);
+void put_be32(ByteIOContext *s, unsigned int val);
+void put_le16(ByteIOContext *s, unsigned int val);
+void put_be16(ByteIOContext *s, unsigned int val);
+void put_tag(ByteIOContext *s, char *tag);
+
+offset_t url_fseek(ByteIOContext *s, offset_t offset, int whence);
+void url_fskip(ByteIOContext *s, offset_t offset);
+offset_t url_ftell(ByteIOContext *s);
+int url_feof(ByteIOContext *s);
+
+void put_flush_packet(ByteIOContext *s);
+
+int get_buffer(ByteIOContext *s, unsigned char *buf, int size);
+int get_byte(ByteIOContext *s);
+unsigned int get_le32(ByteIOContext *s);
+unsigned long long get_le64(ByteIOContext *s);
+unsigned int get_le16(ByteIOContext *s);
+
+unsigned int get_be16(ByteIOContext *s);
+unsigned int get_be32(ByteIOContext *s);
+unsigned long long get_be64(ByteIOContext *s);
+
+extern inline int url_is_streamed(ByteIOContext *s)
+{
+    return s->is_streamed;
+}
+/* get the prefered packet size of the device. All I/Os should be done
+   by multiple of this size */
+extern inline int url_get_packet_size(ByteIOContext *s)
+{
+    return s->packet_size;
+}
+
+int url_fdopen(ByteIOContext *s, URLContext *h);
+int url_setbufsize(ByteIOContext *s, int buf_size);
+int url_fopen(ByteIOContext *s, const char *filename, int flags);
+int url_fclose(ByteIOContext *s);
+URLContext *url_fileno(ByteIOContext *s);
+
+int url_open_buf(ByteIOContext *s, UINT8 *buf, int buf_size, int flags);
+int url_close_buf(ByteIOContext *s);
+
+/* file.c */
+extern URLProtocol file_protocol;
+extern URLProtocol pipe_protocol;
+
+/* udp.c */
+extern URLProtocol udp_protocol;
+
+/* http.c */
+extern URLProtocol http_protocol;
+
+/* audio.c */
+extern const char *audio_device;
+extern URLProtocol audio_protocol;
+
+/* grab.c */
+extern const char *v4l_device;
+extern URLProtocol video_protocol;