* 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 "avformat.h"
#include "avio.h"
#include <stdarg.h>
s->buffer = buffer;
s->buffer_size = buffer_size;
s->buf_ptr = buffer;
- s->write_flag = write_flag;
- if (!s->write_flag)
- s->buf_end = buffer;
- else
- s->buf_end = buffer + buffer_size;
+ url_resetbuf(s, write_flag ? URL_WRONLY : URL_RDONLY);
s->opaque = opaque;
s->write_packet = write_packet;
s->read_packet = read_packet;
s->pos = buffer_size;
s->buf_end = s->buffer + buffer_size;
}
+ s->read_pause = NULL;
+ s->read_seek = NULL;
return 0;
}
+ByteIOContext *av_alloc_put_byte(
+ unsigned char *buffer,
+ int buffer_size,
+ int write_flag,
+ 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)) {
+ ByteIOContext *s = av_mallocz(sizeof(ByteIOContext));
+ init_put_byte(s, buffer, buffer_size, write_flag, opaque,
+ read_packet, write_packet, seek);
+ return s;
+}
+
static void flush_buffer(ByteIOContext *s)
{
if (s->buf_ptr > s->buffer) {
offset_t url_fseek(ByteIOContext *s, offset_t offset, int whence)
{
offset_t offset1;
- offset_t pos= s->pos - (s->write_flag ? 0 : (s->buf_end - s->buffer));
+ offset_t pos;
+
+ if(!s)
+ return AVERROR(EINVAL);
+
+ pos = s->pos - (s->write_flag ? 0 : (s->buf_end - s->buffer));
if (whence != SEEK_CUR && whence != SEEK_SET)
- return -EINVAL;
+ return AVERROR(EINVAL);
if (whence == SEEK_CUR) {
offset1 = pos + (s->buf_ptr - s->buffer);
offset1 >= 0 && offset1 < (s->buf_end - s->buffer) + (1<<16)){
while(s->pos < offset && !s->eof_reached)
fill_buffer(s);
+ if (s->eof_reached)
+ return AVERROR(EPIPE);
s->buf_ptr = s->buf_end + offset - s->pos;
} else {
+ offset_t res = AVERROR(EPIPE);
+
#if defined(CONFIG_MUXERS) || defined(CONFIG_NETWORK)
if (s->write_flag) {
flush_buffer(s);
s->buf_end = s->buffer;
}
s->buf_ptr = s->buffer;
- if (!s->seek || s->seek(s->opaque, offset, SEEK_SET) == (offset_t)-EPIPE)
- return -EPIPE;
+ if (!s->seek || (res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
+ return res;
s->pos = offset;
}
s->eof_reached = 0;
{
offset_t size;
+ if(!s)
+ return AVERROR(EINVAL);
+
if (!s->seek)
- return -EPIPE;
+ return AVERROR(EPIPE);
size = s->seek(s->opaque, 0, AVSEEK_SIZE);
if(size<0){
- size = s->seek(s->opaque, -1, SEEK_END) + 1;
- s->seek(s->opaque, s->pos, SEEK_SET);
+ if ((size = s->seek(s->opaque, -1, SEEK_END)) < 0)
+ return size;
+ size++;
+ s->seek(s->opaque, s->pos, SEEK_SET);
}
return size;
}
int url_feof(ByteIOContext *s)
{
+ if(!s)
+ return 0;
return s->eof_reached;
}
int url_ferror(ByteIOContext *s)
{
+ if(!s)
+ return 0;
return s->error;
}
static void fill_buffer(ByteIOContext *s)
{
- int len;
+ int len=0;
/* no need to do anything if EOF already reached */
if (s->eof_reached)
s->checksum_ptr= s->buffer;
}
- len = s->read_packet(s->opaque, s->buffer, s->buffer_size);
+ if(s->read_packet)
+ len = s->read_packet(s->opaque, s->buffer, s->buffer_size);
if (len <= 0) {
/* do not modify buffer if EOF reached so that a seek back can
be done without rereading data */
s->eof_reached = 1;
- if(len<0)
- s->error= len;
+ if(len<0)
+ s->error= len;
} else {
s->pos += len;
s->buf_ptr = s->buffer;
}
}
+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){
s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_ptr - s->checksum_ptr);
s->update_checksum= NULL;
}
}
-/* NOTE: return 0 if EOF, so you cannot use it if EOF handling is
- necessary */
/* XXX: put an inline version */
int get_byte(ByteIOContext *s)
{
}
}
-/* NOTE: return URL_EOF (-1) if EOF */
int url_fgetc(ByteIOContext *s)
{
if (s->buf_ptr < s->buf_end) {
len = size;
if (len == 0) {
if(size > s->buffer_size && !s->update_checksum){
- len = s->read_packet(s->opaque, buf, size);
+ if(s->read_packet)
+ len = s->read_packet(s->opaque, buf, size);
if (len <= 0) {
/* do not modify buffer if EOF reached so that a seek back can
be done without rereading data */
return val;
}
-/* link with avio functions */
-
-#ifdef CONFIG_MUXERS
-static int url_write_packet(void *opaque, uint8_t *buf, int buf_size)
-{
- URLContext *h = opaque;
- return url_write(h, buf, buf_size);
-}
-#else
-#define url_write_packet NULL
-#endif //CONFIG_MUXERS
-
-static int url_read_packet(void *opaque, uint8_t *buf, int buf_size)
-{
- URLContext *h = opaque;
- return url_read(h, buf, buf_size);
-}
+uint64_t ff_get_v(ByteIOContext *bc){
+ uint64_t val = 0;
+ int tmp;
-static offset_t url_seek_packet(void *opaque, offset_t offset, int whence)
-{
- URLContext *h = opaque;
- return url_seek(h, offset, whence);
- //return 0;
+ do{
+ tmp = get_byte(bc);
+ val= (val<<7) + (tmp&127);
+ }while(tmp&128);
+ return val;
}
-int url_fdopen(ByteIOContext *s, URLContext *h)
+int url_fdopen(ByteIOContext **s, URLContext *h)
{
uint8_t *buffer;
int buffer_size, max_packet_size;
}
buffer = av_malloc(buffer_size);
if (!buffer)
- return -ENOMEM;
+ return AVERROR(ENOMEM);
+
+ *s = av_mallocz(sizeof(ByteIOContext));
+ if(!*s) {
+ av_free(buffer);
+ return AVERROR(ENOMEM);
+ }
- if (init_put_byte(s, buffer, buffer_size,
+ if (init_put_byte(*s, buffer, buffer_size,
(h->flags & URL_WRONLY || h->flags & URL_RDWR), h,
- url_read_packet, url_write_packet, url_seek_packet) < 0) {
+ url_read, url_write, url_seek) < 0) {
av_free(buffer);
- return AVERROR_IO;
+ av_freep(s);
+ return AVERROR(EIO);
+ }
+ (*s)->is_streamed = h->is_streamed;
+ (*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->is_streamed = h->is_streamed;
- s->max_packet_size = max_packet_size;
return 0;
}
-/* XXX: must be called before any I/O */
int url_setbufsize(ByteIOContext *s, int buf_size)
{
uint8_t *buffer;
buffer = av_malloc(buf_size);
if (!buffer)
- return -ENOMEM;
+ return AVERROR(ENOMEM);
av_free(s->buffer);
s->buffer = buffer;
s->buffer_size = buf_size;
s->buf_ptr = buffer;
- if (!s->write_flag)
- s->buf_end = buffer;
- else
- s->buf_end = buffer + buf_size;
+ url_resetbuf(s, s->write_flag ? URL_WRONLY : URL_RDONLY);
return 0;
}
-/* NOTE: when opened as read/write, the buffers are only used for
- reading */
-int url_fopen(ByteIOContext *s, const char *filename, int flags)
+int url_resetbuf(ByteIOContext *s, int flags)
+{
+ URLContext *h = s->opaque;
+ if ((flags & URL_RDWR) || (h && h->flags != flags && !h->flags & URL_RDWR))
+ return AVERROR(EINVAL);
+
+ if (flags & URL_WRONLY) {
+ s->buf_end = s->buffer + s->buffer_size;
+ s->write_flag = 1;
+ } else {
+ s->buf_end = s->buffer;
+ s->write_flag = 0;
+ }
+ return 0;
+}
+
+int url_fopen(ByteIOContext **s, const char *filename, int flags)
{
URLContext *h;
int err;
URLContext *h = s->opaque;
av_free(s->buffer);
- memset(s, 0, sizeof(ByteIOContext));
+ av_free(s);
return url_close(h);
}
}
#ifdef CONFIG_MUXERS
-/* XXX: currently size is limited */
int url_fprintf(ByteIOContext *s, const char *fmt, ...)
{
va_list ap;
}
#endif //CONFIG_MUXERS
-/* note: unlike fgets, the EOL character is not returned and a whole
- line is parsed. return NULL if first char read was EOF */
char *url_fgets(ByteIOContext *s, char *buf, int buf_size)
{
int c;
return buf;
}
-/*
- * Return the maximum packet size associated to packetized buffered file
- * handle. If the file is not packetized (stream like http or file on
- * disk), then 0 is returned.
- *
- * @param h buffered file handle
- * @return maximum packet size in bytes
- */
int url_fget_max_packet_size(ByteIOContext *s)
{
return s->max_packet_size;
}
+int av_url_read_fpause(ByteIOContext *s, int pause)
+{
+ if (!s->read_pause)
+ return AVERROR(ENOSYS);
+ return s->read_pause(s->opaque, pause);
+}
+
+offset_t av_url_read_fseek(ByteIOContext *s,
+ int stream_index, int64_t timestamp, int flags)
+{
+ URLContext *h = s->opaque;
+ offset_t ret;
+ if (!s->read_seek)
+ return AVERROR(ENOSYS);
+ ret = s->read_seek(h, stream_index, timestamp, flags);
+ if(ret >= 0) {
+ s->buf_ptr = s->buf_end; // Flush buffer
+ s->pos = s->seek(h, 0, SEEK_CUR);
+ }
+ 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)
/* buffer handling */
-int url_open_buf(ByteIOContext *s, uint8_t *buf, int buf_size, int flags)
+int url_open_buf(ByteIOContext **s, uint8_t *buf, int buf_size, int flags)
{
- return init_put_byte(s, buf, buf_size,
- (flags & URL_WRONLY || flags & URL_RDWR),
- NULL, NULL, NULL, NULL);
+ int ret;
+ *s = av_mallocz(sizeof(ByteIOContext));
+ if(!*s)
+ return AVERROR(ENOMEM);
+ ret = init_put_byte(*s, buf, buf_size,
+ (flags & URL_WRONLY || flags & URL_RDWR),
+ NULL, NULL, NULL, NULL);
+ if(ret != 0)
+ av_freep(s);
+ return ret;
}
-/* return the written or read size */
int url_close_buf(ByteIOContext *s)
{
put_flush_packet(s);
return 0;
}
-static int url_open_dyn_buf_internal(ByteIOContext *s, int max_packet_size)
+static int url_open_dyn_buf_internal(ByteIOContext **s, int max_packet_size)
{
DynBuffer *d;
int io_buffer_size, ret;
d = av_malloc(sizeof(DynBuffer) + io_buffer_size);
if (!d)
return -1;
+ *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,
+ ret = init_put_byte(*s, d->io_buffer, io_buffer_size,
1, d, NULL,
max_packet_size ? dyn_packet_buf_write : dyn_buf_write,
max_packet_size ? NULL : dyn_buf_seek);
if (ret == 0) {
- s->max_packet_size = max_packet_size;
+ (*s)->max_packet_size = max_packet_size;
+ } else {
+ av_free(d);
+ av_freep(s);
}
return ret;
}
-/*
- * Open a write only memory stream.
- *
- * @param s new IO context
- * @return zero if no error.
- */
-int url_open_dyn_buf(ByteIOContext *s)
+int url_open_dyn_buf(ByteIOContext **s)
{
return url_open_dyn_buf_internal(s, 0);
}
-/*
- * Open a write only packetized memory stream with a maximum packet
- * size of 'max_packet_size'. The stream is stored in a memory buffer
- * with a big endian 4 byte header giving the packet size in bytes.
- *
- * @param s new IO context
- * @param max_packet_size maximum packet size (must be > 0)
- * @return zero if no error.
- */
-int url_open_dyn_packet_buf(ByteIOContext *s, int max_packet_size)
+int url_open_dyn_packet_buf(ByteIOContext **s, int max_packet_size)
{
if (max_packet_size <= 0)
return -1;
return url_open_dyn_buf_internal(s, max_packet_size);
}
-/*
- * Return the written size and a pointer to the buffer. The buffer
- * must be freed with av_free().
- * @param s IO context
- * @param pointer to a byte buffer
- * @return the length of the byte buffer
- */
int url_close_dyn_buf(ByteIOContext *s, uint8_t **pbuffer)
{
DynBuffer *d = s->opaque;
*pbuffer = d->buffer;
size = d->size;
av_free(d);
+ av_free(s);
return size;
}
#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
projects / ffmpeg / blobdiff