mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-31 05:26:37 +02:00
853 lines
20 KiB
C
853 lines
20 KiB
C
/*
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* Buffered I/O for ffmpeg system
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* Copyright (c) 2000,2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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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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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/crc.h"
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "avio.h"
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#include <stdarg.h>
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#define IO_BUFFER_SIZE 32768
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static void fill_buffer(ByteIOContext *s);
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#if LIBAVFORMAT_VERSION_MAJOR >= 53
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static int url_resetbuf(ByteIOContext *s, int flags);
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#endif
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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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int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
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int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
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int64_t (*seek)(void *opaque, int64_t offset, int whence))
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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->opaque = opaque;
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url_resetbuf(s, write_flag ? URL_WRONLY : URL_RDONLY);
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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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s->error = 0;
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s->is_streamed = 0;
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s->max_packet_size = 0;
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s->update_checksum= NULL;
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if(!read_packet && !write_flag){
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s->pos = buffer_size;
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s->buf_end = s->buffer + buffer_size;
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}
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s->read_pause = NULL;
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s->read_seek = NULL;
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return 0;
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}
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ByteIOContext *av_alloc_put_byte(
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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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int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
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int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
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int64_t (*seek)(void *opaque, int64_t offset, int whence))
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{
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ByteIOContext *s = av_mallocz(sizeof(ByteIOContext));
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init_put_byte(s, buffer, buffer_size, write_flag, opaque,
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read_packet, write_packet, seek);
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return s;
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}
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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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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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if(s->update_checksum){
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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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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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void put_buffer(ByteIOContext *s, const unsigned char *buf, int size)
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{
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while (size > 0) {
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int len = FFMIN(s->buf_end - s->buf_ptr, 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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int64_t url_fseek(ByteIOContext *s, int64_t offset, int whence)
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{
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int64_t offset1;
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int64_t pos;
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if(!s)
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return AVERROR(EINVAL);
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pos = s->pos - (s->write_flag ? 0 : (s->buf_end - s->buffer));
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if (whence != SEEK_CUR && whence != SEEK_SET)
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return AVERROR(EINVAL);
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if (whence == SEEK_CUR) {
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offset1 = pos + (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 - 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 if(s->is_streamed && !s->write_flag &&
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offset1 >= 0 && offset1 < (s->buf_end - s->buffer) + (1<<16)){
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while(s->pos < offset && !s->eof_reached)
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fill_buffer(s);
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if (s->eof_reached)
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return AVERROR(EPIPE);
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s->buf_ptr = s->buf_end + offset - s->pos;
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} else {
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int64_t res = AVERROR(EPIPE);
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#if CONFIG_MUXERS || CONFIG_NETWORK
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if (s->write_flag) {
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flush_buffer(s);
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s->must_flush = 1;
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}
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#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
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if (!s->seek || (res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
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return res;
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if (!s->write_flag)
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s->buf_end = s->buffer;
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s->buf_ptr = s->buffer;
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s->pos = offset;
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}
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s->eof_reached = 0;
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return offset;
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}
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void url_fskip(ByteIOContext *s, int64_t offset)
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{
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url_fseek(s, offset, SEEK_CUR);
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}
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int64_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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int64_t url_fsize(ByteIOContext *s)
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{
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int64_t size;
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if(!s)
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return AVERROR(EINVAL);
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if (!s->seek)
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return AVERROR(EPIPE);
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size = s->seek(s->opaque, 0, AVSEEK_SIZE);
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if(size<0){
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if ((size = s->seek(s->opaque, -1, SEEK_END)) < 0)
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return size;
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size++;
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s->seek(s->opaque, s->pos, SEEK_SET);
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}
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return size;
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}
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int url_feof(ByteIOContext *s)
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{
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if(!s)
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return 0;
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return s->eof_reached;
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}
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int url_ferror(ByteIOContext *s)
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{
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if(!s)
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return 0;
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return s->error;
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}
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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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void put_strz(ByteIOContext *s, const char *str)
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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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void put_le64(ByteIOContext *s, uint64_t val)
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{
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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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}
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void put_be64(ByteIOContext *s, uint64_t val)
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{
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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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}
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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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void put_le24(ByteIOContext *s, unsigned int val)
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{
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put_le16(s, val & 0xffff);
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put_byte(s, val >> 16);
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}
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void put_be24(ByteIOContext *s, unsigned int val)
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{
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put_be16(s, val >> 8);
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put_byte(s, val);
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}
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void put_tag(ByteIOContext *s, const char *tag)
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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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/* Input stream */
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static void fill_buffer(ByteIOContext *s)
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{
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uint8_t *dst= !s->max_packet_size && s->buf_end - s->buffer < s->buffer_size ? s->buf_ptr : s->buffer;
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int len= s->buffer_size - (dst - s->buffer);
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assert(s->buf_ptr == s->buf_end);
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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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if(s->update_checksum && dst == s->buffer){
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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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s->checksum_ptr= s->buffer;
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}
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if(s->read_packet)
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len = s->read_packet(s->opaque, dst, len);
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else
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len = 0;
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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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s->eof_reached = 1;
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if(len<0)
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s->error= len;
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} else {
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s->pos += len;
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s->buf_ptr = dst;
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s->buf_end = dst + len;
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}
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}
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unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
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unsigned int len)
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{
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return av_crc(av_crc_get_table(AV_CRC_32_IEEE), checksum, buf, len);
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}
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unsigned long get_checksum(ByteIOContext *s)
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{
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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->update_checksum= NULL;
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return s->checksum;
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}
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void init_checksum(ByteIOContext *s,
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unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
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unsigned long checksum)
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{
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s->update_checksum= update_checksum;
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if(s->update_checksum){
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s->checksum= checksum;
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s->checksum_ptr= s->buf_ptr;
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}
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}
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/* XXX: put an inline version */
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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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int url_fgetc(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 URL_EOF;
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}
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}
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int get_buffer(ByteIOContext *s, unsigned char *buf, int size)
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{
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int len, size1;
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size1 = size;
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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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if (len == 0) {
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if(size > s->buffer_size && !s->update_checksum){
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if(s->read_packet)
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len = s->read_packet(s->opaque, buf, size);
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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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s->eof_reached = 1;
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if(len<0)
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s->error= len;
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break;
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} else {
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s->pos += len;
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size -= len;
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buf += len;
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s->buf_ptr = s->buffer;
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s->buf_end = s->buffer/* + len*/;
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}
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}else{
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fill_buffer(s);
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len = s->buf_end - s->buf_ptr;
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if (len == 0)
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break;
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}
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} else {
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memcpy(buf, s->buf_ptr, len);
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buf += len;
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s->buf_ptr += len;
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size -= len;
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}
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}
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if (size1 == size) {
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if (url_ferror(s)) return url_ferror(s);
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if (url_feof(s)) return AVERROR_EOF;
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}
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return size1 - size;
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}
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int get_partial_buffer(ByteIOContext *s, unsigned char *buf, int size)
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{
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int len;
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if(size<0)
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return -1;
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len = s->buf_end - s->buf_ptr;
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if (len == 0) {
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fill_buffer(s);
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len = s->buf_end - s->buf_ptr;
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}
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if (len > size)
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len = size;
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memcpy(buf, s->buf_ptr, len);
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s->buf_ptr += len;
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if (!len) {
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if (url_ferror(s)) return url_ferror(s);
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if (url_feof(s)) return AVERROR_EOF;
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}
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return len;
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}
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unsigned int get_le16(ByteIOContext *s)
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{
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unsigned int val;
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val = get_byte(s);
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val |= get_byte(s) << 8;
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return val;
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}
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unsigned int get_le24(ByteIOContext *s)
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{
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unsigned int val;
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val = get_le16(s);
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val |= get_byte(s) << 16;
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return val;
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}
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unsigned int get_le32(ByteIOContext *s)
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{
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unsigned int val;
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val = get_le16(s);
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val |= get_le16(s) << 16;
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return val;
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}
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uint64_t get_le64(ByteIOContext *s)
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{
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uint64_t val;
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val = (uint64_t)get_le32(s);
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val |= (uint64_t)get_le32(s) << 32;
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return val;
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}
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unsigned int get_be16(ByteIOContext *s)
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{
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unsigned int val;
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val = get_byte(s) << 8;
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val |= get_byte(s);
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return val;
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}
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unsigned int get_be24(ByteIOContext *s)
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{
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unsigned int val;
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val = get_be16(s) << 8;
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val |= get_byte(s);
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return val;
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}
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unsigned int get_be32(ByteIOContext *s)
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{
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unsigned int val;
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val = get_be16(s) << 16;
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val |= get_be16(s);
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return val;
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}
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char *get_strz(ByteIOContext *s, char *buf, int maxlen)
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{
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int i = 0;
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char c;
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while ((c = get_byte(s))) {
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if (i < maxlen-1)
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buf[i++] = c;
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}
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buf[i] = 0; /* Ensure null terminated, but may be truncated */
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return buf;
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}
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uint64_t get_be64(ByteIOContext *s)
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{
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uint64_t val;
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val = (uint64_t)get_be32(s) << 32;
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val |= (uint64_t)get_be32(s);
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return val;
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}
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uint64_t ff_get_v(ByteIOContext *bc){
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uint64_t val = 0;
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int tmp;
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do{
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tmp = get_byte(bc);
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val= (val<<7) + (tmp&127);
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}while(tmp&128);
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return val;
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}
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int url_fdopen(ByteIOContext **s, URLContext *h)
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{
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uint8_t *buffer;
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int buffer_size, max_packet_size;
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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;
|
|
}
|
|
buffer = av_malloc(buffer_size);
|
|
if (!buffer)
|
|
return AVERROR(ENOMEM);
|
|
|
|
*s = av_mallocz(sizeof(ByteIOContext));
|
|
if(!*s) {
|
|
av_free(buffer);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
if (init_put_byte(*s, buffer, buffer_size,
|
|
(h->flags & URL_WRONLY || h->flags & URL_RDWR), h,
|
|
url_read, url_write, url_seek) < 0) {
|
|
av_free(buffer);
|
|
av_freep(s);
|
|
return AVERROR(EIO);
|
|
}
|
|
(*s)->is_streamed = h->is_streamed;
|
|
(*s)->max_packet_size = max_packet_size;
|
|
if(h->prot) {
|
|
(*s)->read_pause = (int (*)(void *, int))h->prot->url_read_pause;
|
|
(*s)->read_seek = (int64_t (*)(void *, int, int64_t, int))h->prot->url_read_seek;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int url_setbufsize(ByteIOContext *s, int buf_size)
|
|
{
|
|
uint8_t *buffer;
|
|
buffer = av_malloc(buf_size);
|
|
if (!buffer)
|
|
return AVERROR(ENOMEM);
|
|
|
|
av_free(s->buffer);
|
|
s->buffer = buffer;
|
|
s->buffer_size = buf_size;
|
|
s->buf_ptr = buffer;
|
|
url_resetbuf(s, s->write_flag ? URL_WRONLY : URL_RDONLY);
|
|
return 0;
|
|
}
|
|
|
|
#if LIBAVFORMAT_VERSION_MAJOR < 53
|
|
int url_resetbuf(ByteIOContext *s, int flags)
|
|
#else
|
|
static int url_resetbuf(ByteIOContext *s, int flags)
|
|
#endif
|
|
{
|
|
#if LIBAVFORMAT_VERSION_MAJOR < 53
|
|
URLContext *h = s->opaque;
|
|
if ((flags & URL_RDWR) || (h && h->flags != flags && !h->flags & URL_RDWR))
|
|
return AVERROR(EINVAL);
|
|
#else
|
|
assert(flags == URL_WRONLY || flags == URL_RDONLY);
|
|
#endif
|
|
|
|
if (flags & URL_WRONLY) {
|
|
s->buf_end = s->buffer + s->buffer_size;
|
|
s->write_flag = 1;
|
|
} else {
|
|
s->buf_end = s->buffer;
|
|
s->write_flag = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
|
|
av_free(s->buffer);
|
|
av_free(s);
|
|
return url_close(h);
|
|
}
|
|
|
|
URLContext *url_fileno(ByteIOContext *s)
|
|
{
|
|
return s->opaque;
|
|
}
|
|
|
|
#if CONFIG_MUXERS
|
|
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;
|
|
}
|
|
#endif //CONFIG_MUXERS
|
|
|
|
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;
|
|
}
|
|
|
|
int url_fget_max_packet_size(ByteIOContext *s)
|
|
{
|
|
return s->max_packet_size;
|
|
}
|
|
|
|
int av_url_read_fpause(ByteIOContext *s, int pause)
|
|
{
|
|
if (!s->read_pause)
|
|
return AVERROR(ENOSYS);
|
|
return s->read_pause(s->opaque, pause);
|
|
}
|
|
|
|
int64_t av_url_read_fseek(ByteIOContext *s, int stream_index,
|
|
int64_t timestamp, int flags)
|
|
{
|
|
URLContext *h = s->opaque;
|
|
int64_t ret;
|
|
if (!s->read_seek)
|
|
return AVERROR(ENOSYS);
|
|
ret = s->read_seek(h, stream_index, timestamp, flags);
|
|
if(ret >= 0) {
|
|
s->buf_ptr = s->buf_end; // Flush buffer
|
|
s->pos = s->seek(h, 0, SEEK_CUR);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* url_open_dyn_buf and url_close_dyn_buf are used in rtp.c to send a response
|
|
* back to the server even if CONFIG_MUXERS is false. */
|
|
#if CONFIG_MUXERS || CONFIG_NETWORK
|
|
/* buffer handling */
|
|
int url_open_buf(ByteIOContext **s, uint8_t *buf, int buf_size, int flags)
|
|
{
|
|
int ret;
|
|
*s = av_mallocz(sizeof(ByteIOContext));
|
|
if(!*s)
|
|
return AVERROR(ENOMEM);
|
|
ret = init_put_byte(*s, buf, buf_size,
|
|
(flags & URL_WRONLY || flags & URL_RDWR),
|
|
NULL, NULL, NULL, NULL);
|
|
if(ret != 0)
|
|
av_freep(s);
|
|
return ret;
|
|
}
|
|
|
|
int url_close_buf(ByteIOContext *s)
|
|
{
|
|
put_flush_packet(s);
|
|
return s->buf_ptr - s->buffer;
|
|
}
|
|
|
|
/* output in a dynamic buffer */
|
|
|
|
typedef struct DynBuffer {
|
|
int pos, size, allocated_size;
|
|
uint8_t *buffer;
|
|
int io_buffer_size;
|
|
uint8_t io_buffer[1];
|
|
} DynBuffer;
|
|
|
|
static int dyn_buf_write(void *opaque, uint8_t *buf, int buf_size)
|
|
{
|
|
DynBuffer *d = opaque;
|
|
unsigned new_size, new_allocated_size;
|
|
|
|
/* reallocate buffer if needed */
|
|
new_size = d->pos + buf_size;
|
|
new_allocated_size = d->allocated_size;
|
|
if(new_size < d->pos || new_size > INT_MAX/2)
|
|
return -1;
|
|
while (new_size > new_allocated_size) {
|
|
if (!new_allocated_size)
|
|
new_allocated_size = new_size;
|
|
else
|
|
new_allocated_size += new_allocated_size / 2 + 1;
|
|
}
|
|
|
|
if (new_allocated_size > d->allocated_size) {
|
|
d->buffer = av_realloc(d->buffer, new_allocated_size);
|
|
if(d->buffer == NULL)
|
|
return AVERROR(ENOMEM);
|
|
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;
|
|
return buf_size;
|
|
}
|
|
|
|
static int dyn_packet_buf_write(void *opaque, uint8_t *buf, int buf_size)
|
|
{
|
|
unsigned char buf1[4];
|
|
int ret;
|
|
|
|
/* packetized write: output the header */
|
|
AV_WB32(buf1, buf_size);
|
|
ret= dyn_buf_write(opaque, buf1, 4);
|
|
if(ret < 0)
|
|
return ret;
|
|
|
|
/* then the data */
|
|
return dyn_buf_write(opaque, buf, buf_size);
|
|
}
|
|
|
|
static int64_t dyn_buf_seek(void *opaque, int64_t offset, int whence)
|
|
{
|
|
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 ret;
|
|
unsigned io_buffer_size = max_packet_size ? max_packet_size : 1024;
|
|
|
|
if(sizeof(DynBuffer) + io_buffer_size < io_buffer_size)
|
|
return -1;
|
|
d = av_mallocz(sizeof(DynBuffer) + io_buffer_size);
|
|
if (!d)
|
|
return AVERROR(ENOMEM);
|
|
*s = av_mallocz(sizeof(ByteIOContext));
|
|
if(!*s) {
|
|
av_free(d);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
d->io_buffer_size = io_buffer_size;
|
|
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;
|
|
} else {
|
|
av_free(d);
|
|
av_freep(s);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int url_open_dyn_buf(ByteIOContext **s)
|
|
{
|
|
return url_open_dyn_buf_internal(s, 0);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
int url_close_dyn_buf(ByteIOContext *s, uint8_t **pbuffer)
|
|
{
|
|
DynBuffer *d = s->opaque;
|
|
int size;
|
|
|
|
put_flush_packet(s);
|
|
|
|
*pbuffer = d->buffer;
|
|
size = d->size;
|
|
av_free(d);
|
|
av_free(s);
|
|
return size;
|
|
}
|
|
#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
|