2001-07-22 17:18:56 +03:00
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/*
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* Buffered I/O for ffmpeg system
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2002-05-26 01:34:32 +03:00
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* Copyright (c) 2000,2001 Fabrice Bellard
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2001-07-22 17:18:56 +03:00
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*
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2002-05-26 01:34:32 +03:00
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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2001-07-22 17:18:56 +03:00
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*
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2002-05-26 01:34:32 +03:00
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* This library is distributed in the hope that it will be useful,
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2001-07-22 17:18:56 +03:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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2002-05-26 01:34:32 +03:00
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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2001-07-22 17:18:56 +03:00
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*
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2002-05-26 01:34:32 +03:00
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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2001-07-22 17:18:56 +03:00
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*/
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#include "avformat.h"
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2003-02-10 11:35:32 +02:00
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#include "avio.h"
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2002-07-24 20:51:50 +03:00
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#include <stdarg.h>
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2001-07-22 17:18:56 +03:00
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#define IO_BUFFER_SIZE 32768
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int init_put_byte(ByteIOContext *s,
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unsigned char *buffer,
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int buffer_size,
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int write_flag,
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void *opaque,
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2003-02-11 18:35:48 +02:00
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int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
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2004-10-08 23:09:52 +03:00
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int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
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2005-05-30 19:45:08 +03:00
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offset_t (*seek)(void *opaque, offset_t offset, int whence))
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2001-07-22 17:18:56 +03:00
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{
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s->buffer = buffer;
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s->buffer_size = buffer_size;
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s->buf_ptr = buffer;
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s->write_flag = write_flag;
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if (!s->write_flag)
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s->buf_end = buffer;
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else
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s->buf_end = buffer + buffer_size;
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s->opaque = opaque;
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s->write_packet = write_packet;
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s->read_packet = read_packet;
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s->seek = seek;
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s->pos = 0;
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s->must_flush = 0;
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s->eof_reached = 0;
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2004-10-08 23:09:52 +03:00
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s->error = 0;
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2001-07-22 17:18:56 +03:00
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s->is_streamed = 0;
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2002-07-24 20:51:50 +03:00
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s->max_packet_size = 0;
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2004-04-05 15:02:10 +03:00
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s->update_checksum= NULL;
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2001-07-22 17:18:56 +03:00
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return 0;
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}
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2003-10-14 07:15:53 +03:00
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#ifdef CONFIG_ENCODERS
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2001-07-22 17:18:56 +03:00
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static void flush_buffer(ByteIOContext *s)
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{
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if (s->buf_ptr > s->buffer) {
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2004-10-08 23:09:52 +03:00
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if (s->write_packet && !s->error){
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int ret= s->write_packet(s->opaque, s->buffer, s->buf_ptr - s->buffer);
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if(ret < 0){
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s->error = ret;
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}
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}
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2004-04-06 20:40:17 +03:00
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if(s->update_checksum){
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2004-04-05 15:02:10 +03:00
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s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_ptr - s->checksum_ptr);
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s->checksum_ptr= s->buffer;
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}
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2001-07-22 17:18:56 +03:00
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s->pos += s->buf_ptr - s->buffer;
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}
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s->buf_ptr = s->buffer;
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}
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void put_byte(ByteIOContext *s, int b)
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{
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*(s->buf_ptr)++ = b;
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if (s->buf_ptr >= s->buf_end)
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flush_buffer(s);
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}
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2002-09-12 05:26:58 +03:00
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void put_buffer(ByteIOContext *s, const unsigned char *buf, int size)
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2001-07-22 17:18:56 +03:00
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{
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int len;
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while (size > 0) {
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len = (s->buf_end - s->buf_ptr);
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if (len > size)
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len = size;
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memcpy(s->buf_ptr, buf, len);
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s->buf_ptr += len;
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if (s->buf_ptr >= s->buf_end)
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flush_buffer(s);
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buf += len;
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size -= len;
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}
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}
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void put_flush_packet(ByteIOContext *s)
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{
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flush_buffer(s);
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s->must_flush = 0;
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}
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2003-10-14 07:15:53 +03:00
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#endif //CONFIG_ENCODERS
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2001-07-22 17:18:56 +03:00
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offset_t url_fseek(ByteIOContext *s, offset_t offset, int whence)
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{
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offset_t offset1;
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if (whence != SEEK_CUR && whence != SEEK_SET)
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return -EINVAL;
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2003-10-14 07:15:53 +03:00
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#ifdef CONFIG_ENCODERS
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2001-07-22 17:18:56 +03:00
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if (s->write_flag) {
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if (whence == SEEK_CUR) {
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2002-04-08 23:58:56 +03:00
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offset1 = s->pos + (s->buf_ptr - s->buffer);
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2001-07-22 17:18:56 +03:00
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if (offset == 0)
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return offset1;
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offset += offset1;
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}
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offset1 = offset - s->pos;
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if (!s->must_flush &&
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offset1 >= 0 && offset1 < (s->buf_end - s->buffer)) {
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/* can do the seek inside the buffer */
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s->buf_ptr = s->buffer + offset1;
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} else {
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if (!s->seek)
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return -EPIPE;
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flush_buffer(s);
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s->must_flush = 1;
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s->buf_ptr = s->buffer;
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s->seek(s->opaque, offset, SEEK_SET);
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s->pos = offset;
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}
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2003-10-14 07:15:53 +03:00
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} else
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#endif //CONFIG_ENCODERS
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{
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2001-07-22 17:18:56 +03:00
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if (whence == SEEK_CUR) {
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offset1 = s->pos - (s->buf_end - s->buffer) + (s->buf_ptr - s->buffer);
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if (offset == 0)
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return offset1;
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offset += offset1;
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}
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offset1 = offset - (s->pos - (s->buf_end - s->buffer));
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if (offset1 >= 0 && offset1 <= (s->buf_end - s->buffer)) {
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/* can do the seek inside the buffer */
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s->buf_ptr = s->buffer + offset1;
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} else {
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if (!s->seek)
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return -EPIPE;
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s->buf_ptr = s->buffer;
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s->buf_end = s->buffer;
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2004-07-25 14:59:34 +03:00
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if (s->seek(s->opaque, offset, SEEK_SET) == (offset_t)-EPIPE)
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return -EPIPE;
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2001-07-22 17:18:56 +03:00
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s->pos = offset;
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}
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2002-07-24 20:51:50 +03:00
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s->eof_reached = 0;
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2001-07-22 17:18:56 +03:00
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}
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return offset;
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}
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void url_fskip(ByteIOContext *s, offset_t offset)
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{
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url_fseek(s, offset, SEEK_CUR);
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}
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offset_t url_ftell(ByteIOContext *s)
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{
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return url_fseek(s, 0, SEEK_CUR);
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}
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2005-05-19 03:06:27 +03:00
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offset_t url_fsize(ByteIOContext *s)
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{
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offset_t size;
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if (!s->seek)
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return -EPIPE;
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size = s->seek(s->opaque, -1, SEEK_END) + 1;
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s->seek(s->opaque, s->pos, SEEK_SET);
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return size;
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}
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2001-07-22 17:18:56 +03:00
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int url_feof(ByteIOContext *s)
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{
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return s->eof_reached;
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}
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2004-10-08 23:09:52 +03:00
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int url_ferror(ByteIOContext *s)
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{
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return s->error;
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}
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2003-10-14 07:15:53 +03:00
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#ifdef CONFIG_ENCODERS
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2001-07-22 17:18:56 +03:00
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void put_le32(ByteIOContext *s, unsigned int val)
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{
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put_byte(s, val);
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put_byte(s, val >> 8);
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put_byte(s, val >> 16);
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put_byte(s, val >> 24);
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}
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void put_be32(ByteIOContext *s, unsigned int val)
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{
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put_byte(s, val >> 24);
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put_byte(s, val >> 16);
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put_byte(s, val >> 8);
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put_byte(s, val);
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}
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2002-10-22 12:23:14 +03:00
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/* IEEE format is assumed */
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void put_be64_double(ByteIOContext *s, double val)
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{
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union {
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double d;
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2003-02-11 18:35:48 +02:00
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uint64_t ull;
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2002-10-22 12:23:14 +03:00
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} u;
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u.d = val;
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put_be64(s, u.ull);
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2002-09-12 05:26:58 +03:00
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}
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2002-10-22 12:23:14 +03:00
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void put_strz(ByteIOContext *s, const char *str)
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2002-09-12 05:26:58 +03:00
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{
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if (str)
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put_buffer(s, (const unsigned char *) str, strlen(str) + 1);
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else
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put_byte(s, 0);
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}
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2003-02-11 18:35:48 +02:00
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void put_le64(ByteIOContext *s, uint64_t val)
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2001-07-22 17:18:56 +03:00
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{
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2003-02-11 18:35:48 +02:00
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put_le32(s, (uint32_t)(val & 0xffffffff));
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put_le32(s, (uint32_t)(val >> 32));
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2001-07-22 17:18:56 +03:00
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}
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2003-02-11 18:35:48 +02:00
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void put_be64(ByteIOContext *s, uint64_t val)
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2001-07-22 17:18:56 +03:00
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{
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2003-02-11 18:35:48 +02:00
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put_be32(s, (uint32_t)(val >> 32));
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put_be32(s, (uint32_t)(val & 0xffffffff));
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2001-07-22 17:18:56 +03:00
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}
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void put_le16(ByteIOContext *s, unsigned int val)
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{
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put_byte(s, val);
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put_byte(s, val >> 8);
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}
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void put_be16(ByteIOContext *s, unsigned int val)
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{
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put_byte(s, val >> 8);
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put_byte(s, val);
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}
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2002-11-11 11:20:53 +02:00
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void put_tag(ByteIOContext *s, const char *tag)
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2001-07-22 17:18:56 +03:00
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{
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while (*tag) {
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put_byte(s, *tag++);
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}
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}
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2003-10-14 07:15:53 +03:00
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#endif //CONFIG_ENCODERS
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2001-07-22 17:18:56 +03:00
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/* Input stream */
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static void fill_buffer(ByteIOContext *s)
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{
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int len;
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2002-07-24 20:51:50 +03:00
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/* no need to do anything if EOF already reached */
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if (s->eof_reached)
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return;
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2004-04-05 15:02:10 +03:00
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2004-04-06 20:40:17 +03:00
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if(s->update_checksum){
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2005-06-03 11:48:10 +03:00
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if(s->buf_end > s->checksum_ptr)
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s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_end - s->checksum_ptr);
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2004-04-05 15:02:10 +03:00
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s->checksum_ptr= s->buffer;
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}
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2001-07-22 17:18:56 +03:00
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len = s->read_packet(s->opaque, s->buffer, s->buffer_size);
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2002-07-24 20:51:50 +03:00
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if (len <= 0) {
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/* do not modify buffer if EOF reached so that a seek back can
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be done without rereading data */
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2001-07-22 17:18:56 +03:00
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s->eof_reached = 1;
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2004-10-08 23:09:52 +03:00
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if(len<0)
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s->error= len;
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2002-07-24 20:51:50 +03:00
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} else {
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s->pos += len;
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s->buf_ptr = s->buffer;
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s->buf_end = s->buffer + len;
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2001-07-22 17:18:56 +03:00
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}
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}
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2004-04-05 15:02:10 +03:00
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unsigned long get_checksum(ByteIOContext *s){
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s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_ptr - s->checksum_ptr);
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2004-04-06 20:40:17 +03:00
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s->update_checksum= NULL;
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2004-04-05 15:02:10 +03:00
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return s->checksum;
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}
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void init_checksum(ByteIOContext *s, unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len), unsigned long checksum){
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s->update_checksum= update_checksum;
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2004-04-06 20:40:17 +03:00
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if(s->update_checksum){
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s->checksum= s->update_checksum(checksum, NULL, 0);
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s->checksum_ptr= s->buf_ptr;
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}
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2004-04-05 15:02:10 +03:00
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}
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2002-07-24 20:51:50 +03:00
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/* NOTE: return 0 if EOF, so you cannot use it if EOF handling is
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necessary */
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/* XXX: put an inline version */
|
2001-07-22 17:18:56 +03:00
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int get_byte(ByteIOContext *s)
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{
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if (s->buf_ptr < s->buf_end) {
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return *s->buf_ptr++;
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} else {
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fill_buffer(s);
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if (s->buf_ptr < s->buf_end)
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return *s->buf_ptr++;
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else
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return 0;
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}
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}
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|
|
|
|
2002-07-24 20:51:50 +03:00
|
|
|
/* NOTE: return URL_EOF (-1) if EOF */
|
|
|
|
int url_fgetc(ByteIOContext *s)
|
|
|
|
{
|
|
|
|
if (s->buf_ptr < s->buf_end) {
|
|
|
|
return *s->buf_ptr++;
|
|
|
|
} else {
|
|
|
|
fill_buffer(s);
|
|
|
|
if (s->buf_ptr < s->buf_end)
|
|
|
|
return *s->buf_ptr++;
|
|
|
|
else
|
|
|
|
return URL_EOF;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2001-07-22 17:18:56 +03:00
|
|
|
int get_buffer(ByteIOContext *s, unsigned char *buf, int size)
|
|
|
|
{
|
|
|
|
int len, size1;
|
|
|
|
|
|
|
|
size1 = size;
|
|
|
|
while (size > 0) {
|
|
|
|
len = s->buf_end - s->buf_ptr;
|
|
|
|
if (len > size)
|
|
|
|
len = size;
|
|
|
|
if (len == 0) {
|
2005-03-25 00:07:54 +02:00
|
|
|
if(size > s->buffer_size && !s->update_checksum){
|
|
|
|
len = s->read_packet(s->opaque, buf, size);
|
|
|
|
if (len <= 0) {
|
|
|
|
/* do not modify buffer if EOF reached so that a seek back can
|
|
|
|
be done without rereading data */
|
|
|
|
s->eof_reached = 1;
|
|
|
|
if(len<0)
|
|
|
|
s->error= len;
|
|
|
|
break;
|
|
|
|
} else {
|
|
|
|
s->pos += len;
|
|
|
|
size -= len;
|
|
|
|
buf += len;
|
|
|
|
s->buf_ptr = s->buffer;
|
|
|
|
s->buf_end = s->buffer/* + len*/;
|
|
|
|
}
|
|
|
|
}else{
|
|
|
|
fill_buffer(s);
|
|
|
|
len = s->buf_end - s->buf_ptr;
|
|
|
|
if (len == 0)
|
|
|
|
break;
|
|
|
|
}
|
2001-07-22 17:18:56 +03:00
|
|
|
} else {
|
|
|
|
memcpy(buf, s->buf_ptr, len);
|
|
|
|
buf += len;
|
|
|
|
s->buf_ptr += len;
|
|
|
|
size -= len;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return size1 - size;
|
|
|
|
}
|
|
|
|
|
2004-03-15 05:29:32 +02:00
|
|
|
int get_partial_buffer(ByteIOContext *s, unsigned char *buf, int size)
|
|
|
|
{
|
|
|
|
int len;
|
2005-01-12 02:16:25 +02:00
|
|
|
|
|
|
|
if(size<0)
|
|
|
|
return -1;
|
2004-03-15 05:29:32 +02:00
|
|
|
|
|
|
|
len = s->buf_end - s->buf_ptr;
|
|
|
|
if (len == 0) {
|
|
|
|
fill_buffer(s);
|
|
|
|
len = s->buf_end - s->buf_ptr;
|
|
|
|
}
|
|
|
|
if (len > size)
|
|
|
|
len = size;
|
|
|
|
memcpy(buf, s->buf_ptr, len);
|
|
|
|
s->buf_ptr += len;
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
2001-07-22 17:18:56 +03:00
|
|
|
unsigned int get_le16(ByteIOContext *s)
|
|
|
|
{
|
|
|
|
unsigned int val;
|
|
|
|
val = get_byte(s);
|
|
|
|
val |= get_byte(s) << 8;
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned int get_le32(ByteIOContext *s)
|
|
|
|
{
|
|
|
|
unsigned int val;
|
|
|
|
val = get_byte(s);
|
|
|
|
val |= get_byte(s) << 8;
|
|
|
|
val |= get_byte(s) << 16;
|
|
|
|
val |= get_byte(s) << 24;
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
2003-02-11 18:35:48 +02:00
|
|
|
uint64_t get_le64(ByteIOContext *s)
|
2001-07-22 17:18:56 +03:00
|
|
|
{
|
2003-02-11 18:35:48 +02:00
|
|
|
uint64_t val;
|
|
|
|
val = (uint64_t)get_le32(s);
|
|
|
|
val |= (uint64_t)get_le32(s) << 32;
|
2001-07-22 17:18:56 +03:00
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned int get_be16(ByteIOContext *s)
|
|
|
|
{
|
|
|
|
unsigned int val;
|
|
|
|
val = get_byte(s) << 8;
|
|
|
|
val |= get_byte(s);
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned int get_be32(ByteIOContext *s)
|
|
|
|
{
|
|
|
|
unsigned int val;
|
|
|
|
val = get_byte(s) << 24;
|
|
|
|
val |= get_byte(s) << 16;
|
|
|
|
val |= get_byte(s) << 8;
|
|
|
|
val |= get_byte(s);
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
2002-10-22 12:23:14 +03:00
|
|
|
double get_be64_double(ByteIOContext *s)
|
2002-09-12 05:26:58 +03:00
|
|
|
{
|
2002-10-22 12:23:14 +03:00
|
|
|
union {
|
|
|
|
double d;
|
2003-02-11 18:35:48 +02:00
|
|
|
uint64_t ull;
|
2002-10-22 12:23:14 +03:00
|
|
|
} u;
|
2002-09-12 05:26:58 +03:00
|
|
|
|
2002-10-22 12:23:14 +03:00
|
|
|
u.ull = get_be64(s);
|
|
|
|
return u.d;
|
2002-09-12 05:26:58 +03:00
|
|
|
}
|
|
|
|
|
2002-10-22 12:23:14 +03:00
|
|
|
char *get_strz(ByteIOContext *s, char *buf, int maxlen)
|
2002-09-12 05:26:58 +03:00
|
|
|
{
|
|
|
|
int i = 0;
|
|
|
|
char c;
|
|
|
|
|
|
|
|
while ((c = get_byte(s))) {
|
|
|
|
if (i < maxlen-1)
|
|
|
|
buf[i++] = c;
|
|
|
|
}
|
|
|
|
|
|
|
|
buf[i] = 0; /* Ensure null terminated, but may be truncated */
|
|
|
|
|
|
|
|
return buf;
|
|
|
|
}
|
|
|
|
|
2003-02-11 18:35:48 +02:00
|
|
|
uint64_t get_be64(ByteIOContext *s)
|
2001-07-22 17:18:56 +03:00
|
|
|
{
|
2003-02-11 18:35:48 +02:00
|
|
|
uint64_t val;
|
|
|
|
val = (uint64_t)get_be32(s) << 32;
|
|
|
|
val |= (uint64_t)get_be32(s);
|
2001-07-22 17:18:56 +03:00
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* link with avio functions */
|
|
|
|
|
2003-10-14 07:15:53 +03:00
|
|
|
#ifdef CONFIG_ENCODERS
|
2004-10-08 23:09:52 +03:00
|
|
|
static int url_write_packet(void *opaque, uint8_t *buf, int buf_size)
|
2001-07-22 17:18:56 +03:00
|
|
|
{
|
|
|
|
URLContext *h = opaque;
|
2004-10-08 23:09:52 +03:00
|
|
|
return url_write(h, buf, buf_size);
|
2001-07-22 17:18:56 +03:00
|
|
|
}
|
2003-10-14 07:15:53 +03:00
|
|
|
#else
|
|
|
|
#define url_write_packet NULL
|
|
|
|
#endif //CONFIG_ENCODERS
|
2001-07-22 17:18:56 +03:00
|
|
|
|
2003-02-11 18:35:48 +02:00
|
|
|
static int url_read_packet(void *opaque, uint8_t *buf, int buf_size)
|
2001-07-22 17:18:56 +03:00
|
|
|
{
|
|
|
|
URLContext *h = opaque;
|
|
|
|
return url_read(h, buf, buf_size);
|
|
|
|
}
|
|
|
|
|
2005-05-30 19:45:08 +03:00
|
|
|
static offset_t url_seek_packet(void *opaque, offset_t offset, int whence)
|
2001-07-22 17:18:56 +03:00
|
|
|
{
|
|
|
|
URLContext *h = opaque;
|
2004-07-25 14:59:34 +03:00
|
|
|
return url_seek(h, offset, whence);
|
|
|
|
//return 0;
|
2001-07-22 17:18:56 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
int url_fdopen(ByteIOContext *s, URLContext *h)
|
|
|
|
{
|
2003-02-11 18:35:48 +02:00
|
|
|
uint8_t *buffer;
|
2002-07-24 20:51:50 +03:00
|
|
|
int buffer_size, max_packet_size;
|
2001-07-22 17:18:56 +03:00
|
|
|
|
2002-07-24 20:51:50 +03:00
|
|
|
|
|
|
|
max_packet_size = url_get_max_packet_size(h);
|
|
|
|
if (max_packet_size) {
|
|
|
|
buffer_size = max_packet_size; /* no need to bufferize more than one packet */
|
|
|
|
} else {
|
|
|
|
buffer_size = IO_BUFFER_SIZE;
|
|
|
|
}
|
2002-05-19 02:11:09 +03:00
|
|
|
buffer = av_malloc(buffer_size);
|
2001-07-22 17:18:56 +03:00
|
|
|
if (!buffer)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
if (init_put_byte(s, buffer, buffer_size,
|
2004-02-14 18:25:32 +02:00
|
|
|
(h->flags & URL_WRONLY || h->flags & URL_RDWR), h,
|
2001-07-22 17:18:56 +03:00
|
|
|
url_read_packet, url_write_packet, url_seek_packet) < 0) {
|
2002-05-19 02:11:09 +03:00
|
|
|
av_free(buffer);
|
2004-06-19 06:59:34 +03:00
|
|
|
return AVERROR_IO;
|
2001-07-22 17:18:56 +03:00
|
|
|
}
|
|
|
|
s->is_streamed = h->is_streamed;
|
2002-07-24 20:51:50 +03:00
|
|
|
s->max_packet_size = max_packet_size;
|
2001-07-22 17:18:56 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* XXX: must be called before any I/O */
|
|
|
|
int url_setbufsize(ByteIOContext *s, int buf_size)
|
|
|
|
{
|
2003-02-11 18:35:48 +02:00
|
|
|
uint8_t *buffer;
|
2002-05-19 02:11:09 +03:00
|
|
|
buffer = av_malloc(buf_size);
|
2001-07-22 17:18:56 +03:00
|
|
|
if (!buffer)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2002-05-19 02:11:09 +03:00
|
|
|
av_free(s->buffer);
|
2001-07-22 17:18:56 +03:00
|
|
|
s->buffer = buffer;
|
|
|
|
s->buffer_size = buf_size;
|
|
|
|
s->buf_ptr = buffer;
|
|
|
|
if (!s->write_flag)
|
|
|
|
s->buf_end = buffer;
|
|
|
|
else
|
|
|
|
s->buf_end = buffer + buf_size;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2002-07-24 20:51:50 +03:00
|
|
|
/* NOTE: when opened as read/write, the buffers are only used for
|
|
|
|
reading */
|
2001-07-22 17:18:56 +03:00
|
|
|
int url_fopen(ByteIOContext *s, const char *filename, int flags)
|
|
|
|
{
|
|
|
|
URLContext *h;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = url_open(&h, filename, flags);
|
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
err = url_fdopen(s, h);
|
|
|
|
if (err < 0) {
|
|
|
|
url_close(h);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int url_fclose(ByteIOContext *s)
|
|
|
|
{
|
|
|
|
URLContext *h = s->opaque;
|
|
|
|
|
2002-05-19 02:11:09 +03:00
|
|
|
av_free(s->buffer);
|
2001-07-22 17:18:56 +03:00
|
|
|
memset(s, 0, sizeof(ByteIOContext));
|
|
|
|
return url_close(h);
|
|
|
|
}
|
|
|
|
|
|
|
|
URLContext *url_fileno(ByteIOContext *s)
|
|
|
|
{
|
|
|
|
return s->opaque;
|
|
|
|
}
|
|
|
|
|
2003-10-14 07:15:53 +03:00
|
|
|
#ifdef CONFIG_ENCODERS
|
2002-07-24 20:51:50 +03:00
|
|
|
/* XXX: currently size is limited */
|
|
|
|
int url_fprintf(ByteIOContext *s, const char *fmt, ...)
|
|
|
|
{
|
|
|
|
va_list ap;
|
|
|
|
char buf[4096];
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
va_start(ap, fmt);
|
|
|
|
ret = vsnprintf(buf, sizeof(buf), fmt, ap);
|
|
|
|
va_end(ap);
|
|
|
|
put_buffer(s, buf, strlen(buf));
|
|
|
|
return ret;
|
|
|
|
}
|
2003-10-14 07:15:53 +03:00
|
|
|
#endif //CONFIG_ENCODERS
|
2002-07-24 20:51:50 +03:00
|
|
|
|
|
|
|
/* note: unlike fgets, the EOL character is not returned and a whole
|
|
|
|
line is parsed. return NULL if first char read was EOF */
|
|
|
|
char *url_fgets(ByteIOContext *s, char *buf, int buf_size)
|
|
|
|
{
|
|
|
|
int c;
|
|
|
|
char *q;
|
|
|
|
|
|
|
|
c = url_fgetc(s);
|
|
|
|
if (c == EOF)
|
|
|
|
return NULL;
|
|
|
|
q = buf;
|
|
|
|
for(;;) {
|
|
|
|
if (c == EOF || c == '\n')
|
|
|
|
break;
|
|
|
|
if ((q - buf) < buf_size - 1)
|
|
|
|
*q++ = c;
|
|
|
|
c = url_fgetc(s);
|
|
|
|
}
|
|
|
|
if (buf_size > 0)
|
|
|
|
*q = '\0';
|
|
|
|
return buf;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Return the maximum packet size associated to packetized buffered file
|
|
|
|
* handle. If the file is not packetized (stream like http or file on
|
|
|
|
* disk), then 0 is returned.
|
|
|
|
*
|
|
|
|
* @param h buffered file handle
|
|
|
|
* @return maximum packet size in bytes
|
|
|
|
*/
|
|
|
|
int url_fget_max_packet_size(ByteIOContext *s)
|
|
|
|
{
|
|
|
|
return s->max_packet_size;
|
|
|
|
}
|
|
|
|
|
2003-10-14 07:15:53 +03:00
|
|
|
#ifdef CONFIG_ENCODERS
|
2001-07-22 17:18:56 +03:00
|
|
|
/* buffer handling */
|
2003-02-11 18:35:48 +02:00
|
|
|
int url_open_buf(ByteIOContext *s, uint8_t *buf, int buf_size, int flags)
|
2001-07-22 17:18:56 +03:00
|
|
|
{
|
|
|
|
return init_put_byte(s, buf, buf_size,
|
2004-02-14 18:25:32 +02:00
|
|
|
(flags & URL_WRONLY || flags & URL_RDWR),
|
|
|
|
NULL, NULL, NULL, NULL);
|
2001-07-22 17:18:56 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
/* return the written or read size */
|
|
|
|
int url_close_buf(ByteIOContext *s)
|
|
|
|
{
|
2002-07-24 20:51:50 +03:00
|
|
|
put_flush_packet(s);
|
2001-07-22 17:18:56 +03:00
|
|
|
return s->buf_ptr - s->buffer;
|
|
|
|
}
|
2002-07-24 20:51:50 +03:00
|
|
|
|
|
|
|
/* output in a dynamic buffer */
|
|
|
|
|
|
|
|
typedef struct DynBuffer {
|
|
|
|
int pos, size, allocated_size;
|
2003-02-11 18:35:48 +02:00
|
|
|
uint8_t *buffer;
|
2002-07-24 20:51:50 +03:00
|
|
|
int io_buffer_size;
|
2003-02-11 18:35:48 +02:00
|
|
|
uint8_t io_buffer[1];
|
2002-07-24 20:51:50 +03:00
|
|
|
} DynBuffer;
|
|
|
|
|
2004-10-08 23:09:52 +03:00
|
|
|
static int dyn_buf_write(void *opaque, uint8_t *buf, int buf_size)
|
2002-07-24 20:51:50 +03:00
|
|
|
{
|
|
|
|
DynBuffer *d = opaque;
|
|
|
|
int new_size, new_allocated_size;
|
|
|
|
|
|
|
|
/* reallocate buffer if needed */
|
|
|
|
new_size = d->pos + buf_size;
|
|
|
|
new_allocated_size = d->allocated_size;
|
2005-01-08 16:21:33 +02:00
|
|
|
if(new_size < d->pos || new_size > INT_MAX/2)
|
|
|
|
return -1;
|
2002-07-24 20:51:50 +03:00
|
|
|
while (new_size > new_allocated_size) {
|
|
|
|
if (!new_allocated_size)
|
|
|
|
new_allocated_size = new_size;
|
|
|
|
else
|
2005-01-08 16:21:33 +02:00
|
|
|
new_allocated_size += new_allocated_size / 2 + 1;
|
2002-07-24 20:51:50 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
if (new_allocated_size > d->allocated_size) {
|
2003-03-26 12:30:08 +02:00
|
|
|
d->buffer = av_realloc(d->buffer, new_allocated_size);
|
|
|
|
if(d->buffer == NULL)
|
2004-10-08 23:09:52 +03:00
|
|
|
return -1234;
|
2002-07-24 20:51:50 +03:00
|
|
|
d->allocated_size = new_allocated_size;
|
|
|
|
}
|
|
|
|
memcpy(d->buffer + d->pos, buf, buf_size);
|
|
|
|
d->pos = new_size;
|
|
|
|
if (d->pos > d->size)
|
|
|
|
d->size = d->pos;
|
2004-10-08 23:09:52 +03:00
|
|
|
return buf_size;
|
2002-07-24 20:51:50 +03:00
|
|
|
}
|
|
|
|
|
2004-10-08 23:09:52 +03:00
|
|
|
static int dyn_packet_buf_write(void *opaque, uint8_t *buf, int buf_size)
|
2002-07-24 20:51:50 +03:00
|
|
|
{
|
|
|
|
unsigned char buf1[4];
|
2004-10-08 23:09:52 +03:00
|
|
|
int ret;
|
2002-07-24 20:51:50 +03:00
|
|
|
|
|
|
|
/* packetized write: output the header */
|
|
|
|
buf1[0] = (buf_size >> 24);
|
|
|
|
buf1[1] = (buf_size >> 16);
|
|
|
|
buf1[2] = (buf_size >> 8);
|
|
|
|
buf1[3] = (buf_size);
|
2004-10-08 23:09:52 +03:00
|
|
|
ret= dyn_buf_write(opaque, buf1, 4);
|
|
|
|
if(ret < 0)
|
|
|
|
return ret;
|
2002-07-24 20:51:50 +03:00
|
|
|
|
|
|
|
/* then the data */
|
2004-10-08 23:09:52 +03:00
|
|
|
return dyn_buf_write(opaque, buf, buf_size);
|
2002-07-24 20:51:50 +03:00
|
|
|
}
|
|
|
|
|
2005-05-30 19:45:08 +03:00
|
|
|
static offset_t dyn_buf_seek(void *opaque, offset_t offset, int whence)
|
2002-07-24 20:51:50 +03:00
|
|
|
{
|
|
|
|
DynBuffer *d = opaque;
|
|
|
|
|
|
|
|
if (whence == SEEK_CUR)
|
|
|
|
offset += d->pos;
|
|
|
|
else if (whence == SEEK_END)
|
|
|
|
offset += d->size;
|
|
|
|
if (offset < 0 || offset > 0x7fffffffLL)
|
|
|
|
return -1;
|
|
|
|
d->pos = offset;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int url_open_dyn_buf_internal(ByteIOContext *s, int max_packet_size)
|
|
|
|
{
|
|
|
|
DynBuffer *d;
|
|
|
|
int io_buffer_size, ret;
|
|
|
|
|
|
|
|
if (max_packet_size)
|
|
|
|
io_buffer_size = max_packet_size;
|
|
|
|
else
|
|
|
|
io_buffer_size = 1024;
|
|
|
|
|
2005-01-08 16:21:33 +02:00
|
|
|
if(sizeof(DynBuffer) + io_buffer_size < io_buffer_size)
|
|
|
|
return -1;
|
2002-07-24 20:51:50 +03:00
|
|
|
d = av_malloc(sizeof(DynBuffer) + io_buffer_size);
|
|
|
|
if (!d)
|
|
|
|
return -1;
|
|
|
|
d->io_buffer_size = io_buffer_size;
|
|
|
|
d->buffer = NULL;
|
|
|
|
d->pos = 0;
|
|
|
|
d->size = 0;
|
|
|
|
d->allocated_size = 0;
|
|
|
|
ret = init_put_byte(s, d->io_buffer, io_buffer_size,
|
|
|
|
1, d, NULL,
|
|
|
|
max_packet_size ? dyn_packet_buf_write : dyn_buf_write,
|
|
|
|
max_packet_size ? NULL : dyn_buf_seek);
|
|
|
|
if (ret == 0) {
|
|
|
|
s->max_packet_size = max_packet_size;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Open a write only memory stream.
|
|
|
|
*
|
|
|
|
* @param s new IO context
|
|
|
|
* @return zero if no error.
|
|
|
|
*/
|
|
|
|
int url_open_dyn_buf(ByteIOContext *s)
|
|
|
|
{
|
|
|
|
return url_open_dyn_buf_internal(s, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Open a write only packetized memory stream with a maximum packet
|
|
|
|
* size of 'max_packet_size'. The stream is stored in a memory buffer
|
|
|
|
* with a big endian 4 byte header giving the packet size in bytes.
|
|
|
|
*
|
|
|
|
* @param s new IO context
|
|
|
|
* @param max_packet_size maximum packet size (must be > 0)
|
|
|
|
* @return zero if no error.
|
|
|
|
*/
|
|
|
|
int url_open_dyn_packet_buf(ByteIOContext *s, int max_packet_size)
|
|
|
|
{
|
|
|
|
if (max_packet_size <= 0)
|
|
|
|
return -1;
|
|
|
|
return url_open_dyn_buf_internal(s, max_packet_size);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Return the written size and a pointer to the buffer. The buffer
|
|
|
|
* must be freed with av_free().
|
|
|
|
* @param s IO context
|
|
|
|
* @param pointer to a byte buffer
|
|
|
|
* @return the length of the byte buffer
|
|
|
|
*/
|
2003-02-11 18:35:48 +02:00
|
|
|
int url_close_dyn_buf(ByteIOContext *s, uint8_t **pbuffer)
|
2002-07-24 20:51:50 +03:00
|
|
|
{
|
|
|
|
DynBuffer *d = s->opaque;
|
|
|
|
int size;
|
|
|
|
|
|
|
|
put_flush_packet(s);
|
|
|
|
|
|
|
|
*pbuffer = d->buffer;
|
|
|
|
size = d->size;
|
|
|
|
av_free(d);
|
|
|
|
return size;
|
|
|
|
}
|
2003-10-14 07:15:53 +03:00
|
|
|
#endif //CONFIG_ENCODERS
|