* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#include "libavutil/crc.h"
+#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "avio.h"
-#include "crc.h"
#include <stdarg.h>
+#include <unistd.h>
+#include <malloc.h>
#define IO_BUFFER_SIZE 32768
void *opaque,
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
- offset_t (*seek)(void *opaque, offset_t offset, int whence))
+ int64_t (*seek)(void *opaque, int64_t offset, int whence))
{
s->buffer = buffer;
s->buffer_size = buffer_size;
s->buf_ptr = buffer;
- url_resetbuf(s, write_flag ? URL_WRONLY : URL_RDONLY);
s->opaque = opaque;
+ url_resetbuf(s, write_flag ? URL_WRONLY : URL_RDONLY);
s->write_packet = write_packet;
s->read_packet = read_packet;
s->seek = seek;
void *opaque,
int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
- offset_t (*seek)(void *opaque, offset_t offset, int whence)) {
+ int64_t (*seek)(void *opaque, int64_t offset, int whence))
+{
ByteIOContext *s = av_mallocz(sizeof(ByteIOContext));
init_put_byte(s, buffer, buffer_size, write_flag, opaque,
read_packet, write_packet, seek);
return s;
}
+#define BLOCK_SIZE 512
+
static void flush_buffer(ByteIOContext *s)
{
- if (s->buf_ptr > s->buffer) {
+ size_t data_len = s->buf_ptr - s->buffer;
+
+ /* Write all the 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, "YYY dl=%zd, tw=%zd\n", data_len, to_write);
+ if (data_len > 0) {
if (s->write_packet && !s->error){
- int ret= s->write_packet(s->opaque, s->buffer, s->buf_ptr - s->buffer);
+ 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 += s->buf_ptr - s->buffer;
+ s->pos += whole_blocks;
+ 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, SEEK_SET);
+ if (res < 0)
+ av_log(NULL, AV_LOG_ERROR, "seek error inside flush_buffer: %lld\n", res);
+ av_log(NULL, AV_LOG_ERROR, "ZZZ tw=%zu, pos=%zd\n", to_write, s->pos);
}
- s->buf_ptr = s->buffer;
}
void put_byte(ByteIOContext *s, int b)
s->must_flush = 0;
}
-offset_t url_fseek(ByteIOContext *s, offset_t offset, int whence)
+int64_t url_fseek(ByteIOContext *s, int64_t offset, int whence)
{
- offset_t offset1;
- offset_t pos;
+ int64_t offset1;
+ int64_t pos;
if(!s)
return AVERROR(EINVAL);
return offset1;
offset += offset1;
}
+ av_log(NULL, AV_LOG_ERROR, "SEEK to %llu\n", offset);
+
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 &&
return AVERROR(EPIPE);
s->buf_ptr = s->buf_end + offset - s->pos;
} else {
- offset_t res = AVERROR(EPIPE);
+ int64_t res = AVERROR(EPIPE);
-#if defined(CONFIG_MUXERS) || defined(CONFIG_NETWORK)
+#if CONFIG_MUXERS || CONFIG_NETWORK
if (s->write_flag) {
flush_buffer(s);
s->must_flush = 1;
- } else
-#endif /* defined(CONFIG_MUXERS) || defined(CONFIG_NETWORK) */
- {
- s->buf_end = s->buffer;
}
- s->buf_ptr = s->buffer;
+#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
+#warning TODO read the whole block from the file to the buffer
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;
}
-void url_fskip(ByteIOContext *s, offset_t offset)
+void url_fskip(ByteIOContext *s, int64_t offset)
{
url_fseek(s, offset, SEEK_CUR);
}
-offset_t url_ftell(ByteIOContext *s)
+int64_t url_ftell(ByteIOContext *s)
{
return url_fseek(s, 0, SEEK_CUR);
}
-offset_t url_fsize(ByteIOContext *s)
+int64_t url_fsize(ByteIOContext *s)
{
- offset_t size;
+ int64_t size;
if(!s)
return AVERROR(EINVAL);
static void fill_buffer(ByteIOContext *s)
{
- int len=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);
+
+ assert(s->buf_ptr == s->buf_end);
/* no need to do anything if EOF already reached */
if (s->eof_reached)
return;
- if(s->update_checksum){
+ if(s->update_checksum && dst == s->buffer){
if(s->buf_end > s->checksum_ptr)
s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_end - s->checksum_ptr);
s->checksum_ptr= s->buffer;
}
if(s->read_packet)
- len = s->read_packet(s->opaque, s->buffer, s->buffer_size);
+ len = s->read_packet(s->opaque, dst, len);
+ else
+ len = 0;
if (len <= 0) {
/* do not modify buffer if EOF reached so that a seek back can
be done without rereading data */
s->error= len;
} else {
s->pos += len;
- s->buf_ptr = s->buffer;
- s->buf_end = s->buffer + len;
+ s->buf_ptr = dst;
+ s->buf_end = dst + len;
}
}
-unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf, unsigned int len){
+unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
+ unsigned int len)
+{
return av_crc(av_crc_get_table(AV_CRC_32_IEEE), checksum, buf, len);
}
-unsigned long get_checksum(ByteIOContext *s){
+unsigned long get_checksum(ByteIOContext *s)
+{
s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_ptr - s->checksum_ptr);
s->update_checksum= NULL;
return s->checksum;
}
-void init_checksum(ByteIOContext *s, unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len), unsigned long checksum){
+void init_checksum(ByteIOContext *s,
+ unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
+ unsigned long checksum)
+{
s->update_checksum= update_checksum;
if(s->update_checksum){
s->checksum= checksum;
} else {
buffer_size = IO_BUFFER_SIZE;
}
- buffer = av_malloc(buffer_size);
+ buffer_size = 2*buffer_size+BLOCK_SIZE;
+ buffer = memalign(sysconf(_SC_PAGESIZE), buffer_size);
if (!buffer)
return AVERROR(ENOMEM);
(*s)->max_packet_size = max_packet_size;
if(h->prot) {
(*s)->read_pause = (int (*)(void *, int))h->prot->url_read_pause;
- (*s)->read_seek = (offset_t (*)(void *, int, int64_t, int))h->prot->url_read_seek;
+ (*s)->read_seek = (int64_t (*)(void *, int, int64_t, int))h->prot->url_read_seek;
}
return 0;
}
return s->opaque;
}
-#ifdef CONFIG_MUXERS
+#if CONFIG_MUXERS
int url_fprintf(ByteIOContext *s, const char *fmt, ...)
{
va_list ap;
return s->read_pause(s->opaque, pause);
}
-offset_t av_url_read_fseek(ByteIOContext *s,
- int stream_index, int64_t timestamp, int flags)
+int64_t av_url_read_fseek(ByteIOContext *s, int stream_index,
+ int64_t timestamp, int flags)
{
URLContext *h = s->opaque;
- offset_t ret;
+ int64_t ret;
if (!s->read_seek)
return AVERROR(ENOSYS);
ret = s->read_seek(h, stream_index, timestamp, flags);
}
/* 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 not set. */
-#if defined(CONFIG_MUXERS) || defined(CONFIG_NETWORK)
+ * 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)
{
static int dyn_buf_write(void *opaque, uint8_t *buf, int buf_size)
{
DynBuffer *d = opaque;
- int new_size, new_allocated_size;
+ unsigned new_size, new_allocated_size;
/* reallocate buffer if needed */
new_size = d->pos + buf_size;
if (new_allocated_size > d->allocated_size) {
d->buffer = av_realloc(d->buffer, new_allocated_size);
if(d->buffer == NULL)
- return -1234;
+ return AVERROR(ENOMEM);
d->allocated_size = new_allocated_size;
}
memcpy(d->buffer + d->pos, buf, buf_size);
int ret;
/* packetized write: output the header */
- buf1[0] = (buf_size >> 24);
- buf1[1] = (buf_size >> 16);
- buf1[2] = (buf_size >> 8);
- buf1[3] = (buf_size);
+ AV_WB32(buf1, buf_size);
ret= dyn_buf_write(opaque, buf1, 4);
if(ret < 0)
return ret;
return dyn_buf_write(opaque, buf, buf_size);
}
-static offset_t dyn_buf_seek(void *opaque, offset_t offset, int whence)
+static int64_t dyn_buf_seek(void *opaque, int64_t offset, int whence)
{
DynBuffer *d = opaque;
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;
- d = av_malloc(sizeof(DynBuffer) + io_buffer_size);
+ d = av_mallocz(sizeof(DynBuffer) + io_buffer_size);
if (!d)
- return -1;
+ return AVERROR(ENOMEM);
*s = av_mallocz(sizeof(ByteIOContext));
if(!*s) {
av_free(d);
return AVERROR(ENOMEM);
}
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,
projects / frescor / ffmpeg.git / blobdiff