#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "avio.h"
+#include "internal.h"
#include <stdarg.h>
#define IO_BUFFER_SIZE 32768
+/**
+ * Do seeks within this distance ahead of the current buffer by skipping
+ * data instead of calling the protocol seek function, for seekable
+ * protocols.
+ */
+#define SHORT_SEEK_THRESHOLD 4096
+
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 = offset - pos;
if (!s->must_flush &&
- offset1 >= 0 && offset1 < (s->buf_end - s->buffer)) {
+ 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 ||
+ offset1 <= s->buf_end + SHORT_SEEK_THRESHOLD - s->buffer) &&
+ !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 offset;
}
-void url_fskip(ByteIOContext *s, int64_t offset)
+int url_fskip(ByteIOContext *s, int64_t offset)
{
- url_fseek(s, offset, SEEK_CUR);
+ int64_t ret = url_fseek(s, offset, SEEK_CUR);
+ return ret < 0 ? ret : 0;
}
int64_t url_ftell(ByteIOContext *s)
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)
put_byte(s, 0);
}
+int ff_get_v_length(uint64_t val){
+ int i=1;
+
+ while(val>>=7)
+ i++;
+
+ return i;
+}
+
+void ff_put_v(ByteIOContext *bc, uint64_t val){
+ int i= ff_get_v_length(val);
+
+ while(--i>0)
+ put_byte(bc, 128 | (val>>(7*i)));
+
+ put_byte(bc, val&127);
+}
+
void put_le64(ByteIOContext *s, uint64_t val)
{
put_le32(s, (uint32_t)(val & 0xffffffff));
{
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
size -= len;
}
}
+ if (size1 == size) {
+ if (url_ferror(s)) return url_ferror(s);
+ if (url_feof(s)) return AVERROR_EOF;
+ }
return size1 - size;
}
len = size;
memcpy(buf, s->buf_ptr, len);
s->buf_ptr += len;
+ if (!len) {
+ if (url_ferror(s)) return url_ferror(s);
+ if (url_feof(s)) return AVERROR_EOF;
+ }
return len;
}
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
{
- URLContext *h = s->opaque;
- if ((flags & URL_RDWR) || (h && h->flags != flags && !h->flags & URL_RDWR))
+#if LIBAVFORMAT_VERSION_MAJOR < 53
+ if (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;
}
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;
+ int ret;
+ unsigned io_buffer_size = max_packet_size ? max_packet_size : 1024;
if(sizeof(DynBuffer) + io_buffer_size < io_buffer_size)
return -1;
{
DynBuffer *d = s->opaque;
int size;
+ static const char padbuf[FF_INPUT_BUFFER_PADDING_SIZE] = {0};
+ int padding = 0;
+
+ /* don't attempt to pad fixed-size packet buffers */
+ if (!s->max_packet_size) {
+ put_buffer(s, padbuf, sizeof(padbuf));
+ padding = FF_INPUT_BUFFER_PADDING_SIZE;
+ }
put_flush_packet(s);
size = d->size;
av_free(d);
av_free(s);
- return size;
+ return size - padding;
}
#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
projects / ffmpeg / blobdiff