*/
#include "libavutil/crc.h"
+#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "avio.h"
#include <stdarg.h>
#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,
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),
- int64_t (*seek)(void *opaque, int64_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);
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 && !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 defined(CONFIG_MUXERS) || defined(CONFIG_NETWORK)
+#if CONFIG_MUXERS || CONFIG_NETWORK
if (s->write_flag) {
flush_buffer(s);
s->must_flush = 1;
}
-#endif /* defined(CONFIG_MUXERS) || defined(CONFIG_NETWORK) */
- if (!s->seek || (res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
+#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
+ 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)
static void fill_buffer(ByteIOContext *s)
{
- uint8_t *dst= s->buf_end - s->buffer < s->buffer_size ? s->buf_ptr : s->buffer;
+ 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
}
}
-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;
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
{
+#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 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);
}
-int64_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;
int64_t ret;
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;
}
/* 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)
{
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;
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,
{
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