#define IO_BUFFER_SIZE 32768
static void fill_buffer(ByteIOContext *s);
+#if LIBAVFORMAT_VERSION_MAJOR >= 53
+static int url_resetbuf(ByteIOContext *s, int flags);
+#endif
int init_put_byte(ByteIOContext *s,
unsigned char *buffer,
void put_buffer(ByteIOContext *s, const unsigned char *buf, int size)
{
- int len;
-
while (size > 0) {
- len = (s->buf_end - s->buf_ptr);
- if (len > size)
- len = size;
+ int len = FFMIN(s->buf_end - s->buf_ptr, size);
memcpy(s->buf_ptr, buf, len);
s->buf_ptr += len;
{
int64_t offset1;
int64_t pos;
+ int force = whence & AVSEEK_FORCE;
+ whence &= ~AVSEEK_FORCE;
if(!s)
return AVERROR(EINVAL);
offset1 >= 0 && offset1 <= (s->buf_end - s->buffer)) {
/* can do the seek inside the buffer */
s->buf_ptr = s->buffer + offset1;
- } else if(s->is_streamed && !s->write_flag &&
- offset1 >= 0 && offset1 < (s->buf_end - s->buffer) + (1<<16)){
+ } else if(s->is_streamed && !s->write_flag && offset1 >= 0 &&
+ (whence != SEEK_END || force)) {
while(s->pos < offset && !s->eof_reached)
fill_buffer(s);
if (s->eof_reached)
- return AVERROR(EPIPE);
+ return AVERROR_EOF;
s->buf_ptr = s->buf_end + offset - s->pos;
} else {
- int64_t res = AVERROR(EPIPE);
+ int64_t res;
#if CONFIG_MUXERS || CONFIG_NETWORK
if (s->write_flag) {
s->must_flush = 1;
}
#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
- if (!s->seek || (res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
+ if (!s->seek)
+ return AVERROR(EPIPE);
+ if ((res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
return res;
if (!s->write_flag)
s->buf_end = s->buffer;
return AVERROR(EINVAL);
if (!s->seek)
- return AVERROR(EPIPE);
+ return AVERROR(ENOSYS);
size = s->seek(s->opaque, 0, AVSEEK_SIZE);
if(size<0){
if ((size = s->seek(s->opaque, -1, SEEK_END)) < 0)
{
uint8_t *dst= !s->max_packet_size && s->buf_end - s->buffer < s->buffer_size ? s->buf_ptr : s->buffer;
int len= s->buffer_size - (dst - s->buffer);
+ int max_buffer_size = s->max_packet_size ? s->max_packet_size : IO_BUFFER_SIZE;
assert(s->buf_ptr == s->buf_end);
s->checksum_ptr= s->buffer;
}
+ /* make buffer smaller in case it ended up large after probing */
+ if (s->buffer_size > max_buffer_size) {
+ url_setbufsize(s, max_buffer_size);
+
+ s->checksum_ptr = dst = s->buffer;
+ len = s->buffer_size;
+ }
+
if(s->read_packet)
len = s->read_packet(s->opaque, dst, len);
else
uint8_t *buffer;
int buffer_size, max_packet_size;
-
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 */
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;
return 0;
}
+int ff_rewind_with_probe_data(ByteIOContext *s, unsigned char *buf, int buf_size)
+{
+ int64_t buffer_start;
+ int buffer_size;
+ int overlap, new_size;
+
+ if (s->write_flag)
+ return AVERROR(EINVAL);
+
+ buffer_size = s->buf_end - s->buffer;
+
+ /* the buffers must touch or overlap */
+ if ((buffer_start = s->pos - buffer_size) > buf_size)
+ return AVERROR(EINVAL);
+
+ overlap = buf_size - buffer_start;
+ new_size = buf_size + buffer_size - overlap;
+
+ if (new_size > buf_size) {
+ if (!(buf = av_realloc(buf, new_size)))
+ return AVERROR(ENOMEM);
+
+ memcpy(buf + buf_size, s->buffer + overlap, buffer_size - overlap);
+ buf_size = new_size;
+ }
+
+ av_free(s->buffer);
+ s->buf_ptr = s->buffer = buf;
+ s->pos = s->buffer_size = buf_size;
+ s->buf_end = s->buf_ptr + buf_size;
+ s->eof_reached = 0;
+ s->must_flush = 0;
+
+ return 0;
+}
+
int url_fopen(ByteIOContext **s, const char *filename, int flags)
{
URLContext *h;
return AVERROR(ENOSYS);
ret = s->read_seek(h, stream_index, timestamp, flags);
if(ret >= 0) {
+ int64_t pos;
s->buf_ptr = s->buf_end; // Flush buffer
- s->pos = s->seek(h, 0, SEEK_CUR);
+ pos = s->seek(h, 0, SEEK_CUR);
+ if (pos >= 0)
+ s->pos = pos;
+ else if (pos != AVERROR(ENOSYS))
+ ret = pos;
}
return ret;
}