/* unbuffered I/O */
+/**
+ * URL Context.
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * sizeof(URLContext) must not be used outside libav*.
+ */
struct URLContext {
+#if LIBAVFORMAT_VERSION_MAJOR >= 53
+ const AVClass *av_class; ///< information for av_log(). Set by url_open().
+#endif
struct URLProtocol *prot;
int flags;
int is_streamed; /**< true if streamed (no seek possible), default = false */
/**
* Return the maximum packet size associated to packetized file
- * handle. If the file is not packetized (stream like http or file on
+ * handle. If the file is not packetized (stream like HTTP or file on
* disk), then 0 is returned.
*
* @param h file handle
void url_get_filename(URLContext *h, char *buf, int buf_size);
/**
- * the callback is called in blocking functions to test regulary if
+ * The callback is called in blocking functions to test regulary if
* asynchronous interruption is needed. AVERROR(EINTR) is returned
* in this case by the interrupted function. 'NULL' means no interrupt
- * callback is given. i
+ * callback is given.
*/
void url_set_interrupt_cb(URLInterruptCB *interrupt_cb);
/* not implemented */
int url_poll(URLPollEntry *poll_table, int n, int timeout);
-/** Start playing or resume paused playout. Only meaningful if using a network
- * streaming protocol (e.g. MMS). */
-int av_url_read_play(URLContext *h);
-/** Pause playing - only meaningful if using a network streaming protocol
- * (e.g. MMS). */
-int av_url_read_pause(URLContext *h);
+/**
+ * Pause and resume playing - only meaningful if using a network streaming
+ * protocol (e.g. MMS).
+ * @param pause 1 for pause, 0 for resume
+ */
+int av_url_read_pause(URLContext *h, int pause);
+
/**
* Seek to a given timestamp relative to some component stream.
- * Only meaningful if using a network streaming protocol (e.g. MMS.)
+ * Only meaningful if using a network streaming protocol (e.g. MMS.).
* @param stream_index The stream index that the timestamp is relative to.
* If stream_index is (-1) the timestamp should be in AV_TIME_BASE
* units from the beginning of the presentation.
* If a stream_index >= 0 is used and the protocol does not support
* seeking based on component streams, the call will fail with ENOTSUP.
- * @param time_stamp timestamp timestamp in AVStream.time_base units
+ * @param timestamp timestamp in AVStream.time_base units
* or if there is no stream specified then in AV_TIME_BASE units.
* @param flags Optional combination of AVSEEK_FLAG_BACKWARD, AVSEEK_FLAG_BYTE
* and AVSEEK_FLAG_ANY. The protocol may silently ignore
* @return >= 0 on success
* @see AVInputFormat::read_seek
*/
-int av_url_read_seek(URLContext *h,
+offset_t av_url_read_seek(URLContext *h,
int stream_index, int64_t timestamp, int flags);
/**
offset_t (*url_seek)(URLContext *h, offset_t pos, int whence);
int (*url_close)(URLContext *h);
struct URLProtocol *next;
- int (*url_read_play)(URLContext *h);
- int (*url_read_pause)(URLContext *h);
- int (*url_read_seek)(URLContext *h,
+ int (*url_read_pause)(URLContext *h, int pause);
+ offset_t (*url_read_seek)(URLContext *h,
int stream_index, int64_t timestamp, int flags);
} URLProtocol;
int register_protocol(URLProtocol *protocol);
+/**
+ * Bytestream IO Context.
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * sizeof(ByteIOContext) must not be used outside libav*.
+ */
typedef struct {
unsigned char *buffer;
int buffer_size;
unsigned char *checksum_ptr;
unsigned long (*update_checksum)(unsigned long checksum, const uint8_t *buf, unsigned int size);
int error; ///< contains the error code or 0 if no error happened
- int (*read_play)(void *opaque);
- int (*read_pause)(void *opaque);
- int (*read_seek)(void *opaque,
+ int (*read_pause)(void *opaque, int pause);
+ offset_t (*read_seek)(void *opaque,
int stream_index, int64_t timestamp, int flags);
} ByteIOContext;
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
offset_t (*seek)(void *opaque, offset_t offset, int whence));
+ByteIOContext *av_alloc_put_byte(
+ unsigned char *buffer,
+ int buffer_size,
+ int write_flag,
+ void *opaque,
+ int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
+ int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
+ offset_t (*seek)(void *opaque, offset_t offset, int whence));
void put_byte(ByteIOContext *s, int b);
void put_buffer(ByteIOContext *s, const unsigned char *buf, int size);
void put_strz(ByteIOContext *s, const char *buf);
+/**
+ * fseek() equivalent for ByteIOContext.
+ * @return new position or AVERROR.
+ */
offset_t url_fseek(ByteIOContext *s, offset_t offset, int whence);
+
+/**
+ * Skip given number of bytes forward.
+ * @param offset number of bytes
+ */
void url_fskip(ByteIOContext *s, offset_t offset);
+
+/**
+ * ftell() equivalent for ByteIOContext.
+ * @return position or AVERROR.
+ */
offset_t url_ftell(ByteIOContext *s);
+
+/**
+ * Gets the filesize.
+ * @return filesize or AVERROR
+ */
offset_t url_fsize(ByteIOContext *s);
+
+/**
+ * feof() equivalent for ByteIOContext.
+ * @return non zero if and only if end of file
+ */
int url_feof(ByteIOContext *s);
+
int url_ferror(ByteIOContext *s);
-int av_url_read_fplay(ByteIOContext *h);
-int av_url_read_fpause(ByteIOContext *h);
-int av_url_read_fseek(ByteIOContext *h,
+int av_url_read_fpause(ByteIOContext *h, int pause);
+offset_t av_url_read_fseek(ByteIOContext *h,
int stream_index, int64_t timestamp, int flags);
#define URL_EOF (-1)
void put_flush_packet(ByteIOContext *s);
+
+/**
+ * Reads size bytes from ByteIOContext into buf.
+ * @returns number of bytes read or AVERROR
+ */
int get_buffer(ByteIOContext *s, unsigned char *buf, int size);
+
+/**
+ * Reads size bytes from ByteIOContext into buf.
+ * This reads at most 1 packet. If that is not enough fewer bytes will be
+ * returned.
+ * @returns number of bytes read or AVERROR
+ */
int get_partial_buffer(ByteIOContext *s, unsigned char *buf, int size);
/** @note return 0 if EOF, so you cannot use it if EOF handling is
projects / ffmpeg / blobdiff