#include "avformat.h"
#include "avio.h"
#include <stdarg.h>
-#include <malloc.h>
#include <unistd.h>
+#include <malloc.h>
#define IO_BUFFER_SIZE 32768
return s;
}
+#define BLOCK_SIZE 512
+
+static void flush_buffer_o_direct(ByteIOContext *s)
+{
+ size_t data_len = s->buf_ptr - s->buffer;
+
+ /* Write all data in the buffer to the disk together with any
+ * additional space at the end of the buffer up to the first
+ * multiple of BLOCK_SIZE. The last block is always written to the
+ * disk despite not being fully filled. If the last block is not
+ * fully filled, we keep it (moved to the begginig of the buffer)
+ * and any subsequent call to this function will rewrite the block
+ * together with the additional data added to the buffer. */
+ size_t to_write = (data_len + BLOCK_SIZE - 1) & ~(BLOCK_SIZE - 1);
+ size_t whole_blocks = data_len & ~(BLOCK_SIZE - 1);
+ int64_t res = AVERROR(EPIPE);
+
+ av_log(NULL, AV_LOG_ERROR, " really writing %zx\n", to_write);
+ if (data_len > 0) {
+ if (s->write_packet && !s->error){
+ int ret= s->write_packet(s->opaque, s->buffer, to_write);
+ if(ret < 0){
+ s->error = ret;
+ }
+ }
+ if(s->update_checksum){
+ av_log(NULL, AV_LOG_ERROR, "Checksumming not implemented in O_DIRECT patch\n");
+ s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_ptr - s->checksum_ptr);
+ s->checksum_ptr= s->buffer;
+ }
+ s->pos += to_write;
+ memcpy(s->buffer, &s->buffer[whole_blocks], data_len - whole_blocks);
+ s->buf_ptr -= whole_blocks;
+
+ if (s->seek)
+ res = s->seek(s->opaque, s->pos - to_write + whole_blocks, SEEK_SET);
+ if (res < 0)
+ av_log(NULL, AV_LOG_ERROR, "seek error inside %s: %lld\n", __func__, res);
+ //av_log(NULL, AV_LOG_ERROR, "ZZZ tw=%zu, pos=%zd\n", to_write, s->pos);
+ }
+}
+
static void flush_buffer(ByteIOContext *s)
{
+ av_log(NULL, AV_LOG_ERROR, "WRITE %p: pos=%zx len=%zx\n", s, s->pos, s->buf_ptr - s->buffer);
+ if (s->o_direct_flag) {
+ flush_buffer_o_direct(s);
+ return;
+ }
if (s->buf_ptr > s->buffer) {
if (s->write_packet && !s->error){
int ret= s->write_packet(s->opaque, s->buffer, s->buf_ptr - s->buffer);
return offset1;
offset += offset1;
}
+ //if (s->o_direct_flag)
+ av_log(NULL, AV_LOG_ERROR, "SEEK %p: from %llx to %llx\n", s, pos, offset);
+
offset1 = offset - pos;
if (!s->must_flush &&
offset1 >= 0 && offset1 <= (s->buf_end - s->buffer)) {
/* can do the seek inside the buffer */
s->buf_ptr = s->buffer + offset1;
+ if (s->o_direct_flag)
+ av_log(NULL, AV_LOG_ERROR, "Internal seek by %llx\n", offset1);
} else if(s->is_streamed && !s->write_flag &&
offset1 >= 0 && offset1 < (s->buf_end - s->buffer) + (1<<16)){
while(s->pos < offset && !s->eof_reached)
s->must_flush = 1;
}
#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
- if (!s->seek || (res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
- return res;
- if (!s->write_flag)
- s->buf_end = s->buffer;
- s->buf_ptr = s->buffer;
- s->pos = offset;
+ if (s->o_direct_flag) {
+ /* Read the whole block from the seek destination */
+ offset1 = offset & ~(BLOCK_SIZE - 1);
+ if (!s->seek || (res = s->seek(s->opaque, offset1, SEEK_SET)) < 0)
+ return res;
+ av_log(NULL, AV_LOG_ERROR, "READ block from %llx\n", offset1);
+ if ((res = s->read_packet(s->opaque, s->buffer, BLOCK_SIZE)) < 0)
+ return res;
+ if (!s->seek || (res = s->seek(s->opaque, offset1, SEEK_SET)) < 0)
+ return res;
+ s->buf_ptr = s->buffer + offset - offset1;
+ s->pos = offset;
+ } else {
+ if (!s->seek || (res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
+ return res;
+ if (!s->write_flag)
+ s->buf_end = s->buffer;
+ s->buf_ptr = s->buffer;
+ s->pos = offset;
+ }
}
s->eof_reached = 0;
return offset;
} else {
buffer_size = IO_BUFFER_SIZE;
}
- buffer = memalign(sysconf(_SC_PAGESIZE), buffer_size);
+ if (h->flags & URL_DIRECT) {
+ buffer_size = 2*buffer_size+BLOCK_SIZE;
+ buffer = memalign(sysconf(_SC_PAGESIZE), buffer_size);
+ ;
+ } else {
+ buffer = av_malloc(buffer_size);
+ }
if (!buffer)
return AVERROR(ENOMEM);
}
(*s)->is_streamed = h->is_streamed;
(*s)->max_packet_size = max_packet_size;
+ (*s)->o_direct_flag = !!(h->flags & URL_DIRECT);
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;