/*
- * Buffered I/O for ffmpeg system
+ * buffered I/O
* Copyright (c) 2000,2001 Fabrice Bellard
*
* This file is part of Libav.
*/
#include "libavutil/crc.h"
+#include "libavutil/dict.h"
#include "libavutil/intreadwrite.h"
+#include "libavutil/log.h"
+#include "libavutil/opt.h"
#include "avformat.h"
#include "avio.h"
#include "avio_internal.h"
*/
#define SHORT_SEEK_THRESHOLD 4096
+static void *ff_avio_child_next(void *obj, void *prev)
+{
+ AVIOContext *s = obj;
+ return prev ? NULL : s->opaque;
+}
+
+static const AVClass *ff_avio_child_class_next(const AVClass *prev)
+{
+ return prev ? NULL : &ffurl_context_class;
+}
+
+static const AVOption ff_avio_options[] = {
+ { NULL },
+};
+
+const AVClass ff_avio_class = {
+ .class_name = "AVIOContext",
+ .item_name = av_default_item_name,
+ .version = LIBAVUTIL_VERSION_INT,
+ .option = ff_avio_options,
+ .child_next = ff_avio_child_next,
+ .child_class_next = ff_avio_child_class_next,
+};
+
static void fill_buffer(AVIOContext *s);
-#if !FF_API_URL_RESETBUF
static int url_resetbuf(AVIOContext *s, int flags);
-#endif
int ffio_init_context(AVIOContext *s,
unsigned char *buffer,
int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
int64_t (*seek)(void *opaque, int64_t offset, int whence))
{
- s->buffer = buffer;
+ s->buffer = buffer;
s->buffer_size = buffer_size;
- s->buf_ptr = buffer;
- 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;
- s->pos = 0;
- s->must_flush = 0;
- s->eof_reached = 0;
- s->error = 0;
-#if FF_API_OLD_AVIO
- s->is_streamed = 0;
-#endif
- s->seekable = AVIO_SEEKABLE_NORMAL;
+ s->buf_ptr = buffer;
+ s->opaque = opaque;
+
+ url_resetbuf(s, write_flag ? AVIO_FLAG_WRITE : AVIO_FLAG_READ);
+
+ s->write_packet = write_packet;
+ s->read_packet = read_packet;
+ s->seek = seek;
+ s->pos = 0;
+ s->must_flush = 0;
+ s->eof_reached = 0;
+ s->error = 0;
+ s->seekable = seek ? AVIO_SEEKABLE_NORMAL : 0;
s->max_packet_size = 0;
- s->update_checksum= NULL;
- if(!read_packet && !write_flag){
- s->pos = buffer_size;
+ s->update_checksum = NULL;
+
+ if (!read_packet && !write_flag) {
+ s->pos = buffer_size;
s->buf_end = s->buffer + buffer_size;
}
s->read_pause = NULL;
s->read_seek = NULL;
- return 0;
-}
-#if FF_API_OLD_AVIO
-int init_put_byte(AVIOContext *s,
- 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),
- int64_t (*seek)(void *opaque, int64_t offset, int whence))
-{
- return ffio_init_context(s, buffer, buffer_size, write_flag, opaque,
- read_packet, write_packet, seek);
-}
-AVIOContext *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),
- int64_t (*seek)(void *opaque, int64_t offset, int whence))
-{
- return avio_alloc_context(buffer, buffer_size, write_flag, opaque,
- read_packet, write_packet, seek);
+ return 0;
}
-#endif
AVIOContext *avio_alloc_context(
unsigned char *buffer,
int64_t (*seek)(void *opaque, int64_t offset, int whence))
{
AVIOContext *s = av_mallocz(sizeof(AVIOContext));
+ if (!s)
+ return NULL;
ffio_init_context(s, buffer, buffer_size, write_flag, opaque,
read_packet, write_packet, seek);
return s;
static void flush_buffer(AVIOContext *s)
{
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);
- if(ret < 0){
+ if (s->write_packet && !s->error) {
+ int ret = s->write_packet(s->opaque, s->buffer,
+ s->buf_ptr - s->buffer);
+ if (ret < 0) {
s->error = ret;
}
}
- if(s->update_checksum){
- s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_ptr - s->checksum_ptr);
- s->checksum_ptr= s->buffer;
+ if (s->update_checksum) {
+ 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;
}
void avio_w8(AVIOContext *s, int b)
{
- *(s->buf_ptr)++ = b;
+ *s->buf_ptr++ = b;
if (s->buf_ptr >= s->buf_end)
flush_buffer(s);
}
}
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->seekable ||
} else {
int64_t res;
-#if CONFIG_MUXERS || CONFIG_NETWORK
if (s->write_flag) {
flush_buffer(s);
s->must_flush = 1;
}
-#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
if (!s->seek)
return AVERROR(EPIPE);
if ((res = s->seek(s->opaque, offset, SEEK_SET)) < 0)
return offset;
}
-#if FF_API_OLD_AVIO
-int url_fskip(AVIOContext *s, int64_t offset)
-{
- int64_t ret = avio_seek(s, offset, SEEK_CUR);
- return ret < 0 ? ret : 0;
-}
-
-int64_t url_ftell(AVIOContext *s)
-{
- return avio_seek(s, 0, SEEK_CUR);
-}
-#endif
-
int64_t avio_size(AVIOContext *s)
{
int64_t size;
- if(!s)
+ if (!s)
return AVERROR(EINVAL);
if (!s->seek)
return AVERROR(ENOSYS);
size = s->seek(s->opaque, 0, AVSEEK_SIZE);
- if(size<0){
+ if (size < 0) {
if ((size = s->seek(s->opaque, -1, SEEK_END)) < 0)
return size;
size++;
return size;
}
-#if FF_API_OLD_AVIO
-int url_feof(AVIOContext *s)
-{
- if(!s)
- return 0;
- return s->eof_reached;
-}
-
-int url_ferror(AVIOContext *s)
-{
- if(!s)
- return 0;
- return s->error;
-}
-#endif
-
void avio_wl32(AVIOContext *s, unsigned int val)
{
avio_w8(s, val);
avio_w8(s, val);
}
-#if FF_API_OLD_AVIO
-void put_strz(AVIOContext *s, const char *str)
-{
- avio_put_str(s, str);
-}
-
-#define GET(name, type) \
- type get_be ##name(AVIOContext *s) \
-{\
- return avio_rb ##name(s);\
-}\
- type get_le ##name(AVIOContext *s) \
-{\
- return avio_rl ##name(s);\
-}
-
-GET(16, unsigned int)
-GET(24, unsigned int)
-GET(32, unsigned int)
-GET(64, uint64_t)
-
-#undef GET
-
-#define PUT(name, type ) \
- void put_le ##name(AVIOContext *s, type val)\
-{\
- avio_wl ##name(s, val);\
-}\
- void put_be ##name(AVIOContext *s, type val)\
-{\
- avio_wb ##name(s, val);\
-}
-
-PUT(16, unsigned int)
-PUT(24, unsigned int)
-PUT(32, unsigned int)
-PUT(64, uint64_t)
-#undef PUT
-
-int get_byte(AVIOContext *s)
-{
- return avio_r8(s);
-}
-int get_buffer(AVIOContext *s, unsigned char *buf, int size)
-{
- return avio_read(s, buf, size);
-}
-int get_partial_buffer(AVIOContext *s, unsigned char *buf, int size)
-{
- return ffio_read_partial(s, buf, size);
-}
-void put_byte(AVIOContext *s, int val)
-{
- avio_w8(s, val);
-}
-void put_buffer(AVIOContext *s, const unsigned char *buf, int size)
-{
- avio_write(s, buf, size);
-}
-void put_nbyte(AVIOContext *s, int b, int count)
-{
- ffio_fill(s, b, count);
-}
-
-int url_fopen(AVIOContext **s, const char *filename, int flags)
-{
- return avio_open(s, filename, flags);
-}
-int url_fclose(AVIOContext *s)
-{
- return avio_close(s);
-}
-int64_t url_fseek(AVIOContext *s, int64_t offset, int whence)
-{
- return avio_seek(s, offset, whence);
-}
-int64_t url_fsize(AVIOContext *s)
-{
- return avio_size(s);
-}
-int url_setbufsize(AVIOContext *s, int buf_size)
-{
- return ffio_set_buf_size(s, buf_size);
-}
-int url_fprintf(AVIOContext *s, const char *fmt, ...)
-{
- va_list ap;
- char buf[4096];
- int ret;
-
- va_start(ap, fmt);
- ret = vsnprintf(buf, sizeof(buf), fmt, ap);
- va_end(ap);
- avio_write(s, buf, strlen(buf));
- return ret;
-}
-void put_flush_packet(AVIOContext *s)
-{
- avio_flush(s);
-}
-int av_url_read_fpause(AVIOContext *s, int pause)
-{
- return ffio_read_pause(s, pause);
-}
-int64_t av_url_read_fseek(AVIOContext *s, int stream_index,
- int64_t timestamp, int flags)
-{
- return ffio_read_seek(s, stream_index, timestamp, flags);
-}
-void init_checksum(AVIOContext *s,
- unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
- unsigned long checksum)
-{
- ffio_init_checksum(s, update_checksum, checksum);
-}
-unsigned long get_checksum(AVIOContext *s)
-{
- return ffio_get_checksum(s);
-}
-int url_open_dyn_buf(AVIOContext **s)
-{
- return avio_open_dyn_buf(s);
-}
-int url_open_dyn_packet_buf(AVIOContext **s, int max_packet_size)
-{
- return ffio_open_dyn_packet_buf(s, max_packet_size);
-}
-int url_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
-{
- return avio_close_dyn_buf(s, pbuffer);
-}
-int url_fdopen(AVIOContext **s, URLContext *h)
-{
- return ffio_fdopen(s, h);
-}
-#endif
-
int avio_put_str(AVIOContext *s, const char *str)
{
int len = 1;
return len;
}
-int avio_put_str16le(AVIOContext *s, const char *str)
-{
- const uint8_t *q = str;
- int ret = 0;
+#define PUT_STR16(type, write) \
+ int avio_put_str16 ## type(AVIOContext * s, const char *str) \
+ { \
+ const uint8_t *q = str; \
+ int ret = 0; \
+ \
+ while (*q) { \
+ uint32_t ch; \
+ uint16_t tmp; \
+ \
+ GET_UTF8(ch, *q++, break; ) \
+ PUT_UTF16(ch, tmp, write(s, tmp); ret += 2; ) \
+ } \
+ write(s, 0); \
+ ret += 2; \
+ return ret; \
+ }
- while (*q) {
- uint32_t ch;
- uint16_t tmp;
+PUT_STR16(le, avio_wl16)
+PUT_STR16(be, avio_wb16)
- GET_UTF8(ch, *q++, break;)
- PUT_UTF16(ch, tmp, avio_wl16(s, tmp);ret += 2;)
- }
- avio_wl16(s, 0);
- ret += 2;
- return ret;
-}
+#undef PUT_STR16
-int ff_get_v_length(uint64_t val){
- int i=1;
+int ff_get_v_length(uint64_t val)
+{
+ int i = 1;
- while(val>>=7)
+ while (val >>= 7)
i++;
return i;
}
-void ff_put_v(AVIOContext *bc, uint64_t val){
- int i= ff_get_v_length(val);
+void ff_put_v(AVIOContext *bc, uint64_t val)
+{
+ int i = ff_get_v_length(val);
- while(--i>0)
- avio_w8(bc, 128 | (val>>(7*i)));
+ while (--i > 0)
+ avio_w8(bc, 128 | (val >> (7 * i)));
- avio_w8(bc, val&127);
+ avio_w8(bc, val & 127);
}
void avio_wl64(AVIOContext *s, uint64_t val)
avio_w8(s, val);
}
-#if FF_API_OLD_AVIO
-void put_tag(AVIOContext *s, const char *tag)
-{
- while (*tag) {
- avio_w8(s, *tag++);
- }
-}
-#endif
-
/* Input stream */
static void fill_buffer(AVIOContext *s)
{
- uint8_t *dst= !s->max_packet_size && s->buf_end - s->buffer < s->buffer_size ? s->buf_end : 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;
+ uint8_t *dst = !s->max_packet_size &&
+ s->buf_end - s->buffer < s->buffer_size ?
+ s->buf_end : 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;
+
+ /* can't fill the buffer without read_packet, just set EOF if appropriate */
+ if (!s->read_packet && s->buf_ptr >= s->buf_end)
+ s->eof_reached = 1;
/* no need to do anything if EOF already reached */
if (s->eof_reached)
return;
- 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->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;
}
/* make buffer smaller in case it ended up large after probing */
len = s->buffer_size;
}
- if(s->read_packet)
+ if (s->read_packet)
len = s->read_packet(s->opaque, dst, len);
else
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 = dst;
return av_crc(av_crc_get_table(AV_CRC_32_IEEE), checksum, buf, len);
}
+unsigned long ff_crcA001_update(unsigned long checksum, const uint8_t *buf,
+ unsigned int len)
+{
+ return av_crc(av_crc_get_table(AV_CRC_16_ANSI_LE), checksum, buf, len);
+}
+
unsigned long ffio_get_checksum(AVIOContext *s)
{
- s->checksum= s->update_checksum(s->checksum, s->checksum_ptr, s->buf_ptr - s->checksum_ptr);
- s->update_checksum= NULL;
+ s->checksum = s->update_checksum(s->checksum, s->checksum_ptr,
+ s->buf_ptr - s->checksum_ptr);
+ s->update_checksum = NULL;
return s->checksum;
}
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;
- s->checksum_ptr= s->buf_ptr;
+ s->update_checksum = update_checksum;
+ if (s->update_checksum) {
+ s->checksum = checksum;
+ s->checksum_ptr = s->buf_ptr;
}
}
return 0;
}
-#if FF_API_OLD_AVIO
-int url_fgetc(AVIOContext *s)
-{
- if (s->buf_ptr >= s->buf_end)
- fill_buffer(s);
- if (s->buf_ptr < s->buf_end)
- return *s->buf_ptr++;
- return URL_EOF;
-}
-#endif
-
int avio_read(AVIOContext *s, unsigned char *buf, int size)
{
int len, size1;
len = s->buf_end - s->buf_ptr;
if (len > size)
len = size;
- if (len == 0) {
+ if (len == 0 || s->write_flag) {
if(size > s->buffer_size && !s->update_checksum){
if(s->read_packet)
len = s->read_packet(s->opaque, buf, size);
s->buf_ptr = s->buffer;
s->buf_end = s->buffer/* + len*/;
}
- }else{
+ } else {
fill_buffer(s);
len = s->buf_end - s->buf_ptr;
if (len == 0)
return size1 - size;
}
+int ffio_read_size(AVIOContext *s, unsigned char *buf, int size)
+{
+ int ret = avio_read(s, buf, size);
+ if (ret != size)
+ return AVERROR_INVALIDDATA;
+ return ret;
+}
+
+int ffio_read_indirect(AVIOContext *s, unsigned char *buf, int size, const unsigned char **data)
+{
+ if (s->buf_end - s->buf_ptr >= size && !s->write_flag) {
+ *data = s->buf_ptr;
+ s->buf_ptr += size;
+ return size;
+ } else {
+ *data = buf;
+ return avio_read(s, buf, size);
+ }
+}
+
int ffio_read_partial(AVIOContext *s, unsigned char *buf, int size)
{
int len;
- if(size<0)
+ if (size < 0)
return -1;
+ if (s->read_packet && s->write_flag) {
+ len = s->read_packet(s->opaque, buf, size);
+ if (len > 0)
+ s->pos += len;
+ return len;
+ }
+
len = s->buf_end - s->buf_ptr;
if (len == 0) {
+ /* Reset the buf_end pointer to the start of the buffer, to make sure
+ * the fill_buffer call tries to read as much data as fits into the
+ * full buffer, instead of just what space is left after buf_end.
+ * This avoids returning partial packets at the end of the buffer,
+ * for packet based inputs.
+ */
+ s->buf_end = s->buf_ptr = s->buffer;
fill_buffer(s);
len = s->buf_end - s->buf_ptr;
}
return val;
}
-#if FF_API_OLD_AVIO
-char *get_strz(AVIOContext *s, char *buf, int maxlen)
-{
- avio_get_str(s, INT_MAX, buf, maxlen);
- return buf;
-}
-#endif
-
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
{
int i = 0;
{
int i;
+ if (buflen <= 0)
+ return AVERROR(EINVAL);
// reserve 1 byte for terminating 0
buflen = FFMIN(buflen - 1, maxlen);
for (i = 0; i < buflen; i++)
if (!(buf[i] = avio_r8(s)))
return i + 1;
- if (buflen)
- buf[i] = 0;
+ buf[i] = 0;
for (; i < maxlen; i++)
if (!avio_r8(s))
return i + 1;
{\
char* q = buf;\
int ret = 0;\
+ if (buflen <= 0) \
+ return AVERROR(EINVAL); \
while (ret + 1 < maxlen) {\
uint8_t tmp;\
uint32_t ch;\
uint8_t *buffer;
int buffer_size, max_packet_size;
- max_packet_size = url_get_max_packet_size(h);
+ max_packet_size = h->max_packet_size;
if (max_packet_size) {
buffer_size = max_packet_size; /* no need to bufferize more than one packet */
} else {
if (!buffer)
return AVERROR(ENOMEM);
- *s = av_mallocz(sizeof(AVIOContext));
- if(!*s) {
+ *s = avio_alloc_context(buffer, buffer_size, h->flags & AVIO_FLAG_WRITE, h,
+ (int (*)(void *, uint8_t *, int)) ffurl_read,
+ (int (*)(void *, uint8_t *, int)) ffurl_write,
+ (int64_t (*)(void *, int64_t, int)) ffurl_seek);
+ if (!*s) {
av_free(buffer);
return AVERROR(ENOMEM);
}
-
- if (ffio_init_context(*s, buffer, buffer_size,
- (h->flags & URL_WRONLY || h->flags & URL_RDWR), h,
- ffurl_read, ffurl_write, ffurl_seek) < 0) {
- av_free(buffer);
- av_freep(s);
- return AVERROR(EIO);
- }
-#if FF_API_OLD_AVIO
- (*s)->is_streamed = h->is_streamed;
-#endif
(*s)->seekable = h->is_streamed ? 0 : AVIO_SEEKABLE_NORMAL;
(*s)->max_packet_size = max_packet_size;
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;
}
+ (*s)->av_class = &ff_avio_class;
return 0;
}
s->buffer = buffer;
s->buffer_size = buf_size;
s->buf_ptr = buffer;
- url_resetbuf(s, s->write_flag ? URL_WRONLY : URL_RDONLY);
+ url_resetbuf(s, s->write_flag ? AVIO_FLAG_WRITE : AVIO_FLAG_READ);
return 0;
}
-#if FF_API_URL_RESETBUF
-int url_resetbuf(AVIOContext *s, int flags)
-#else
static int url_resetbuf(AVIOContext *s, int flags)
-#endif
{
-#if FF_API_URL_RESETBUF
- if (flags & URL_RDWR)
- return AVERROR(EINVAL);
-#else
- assert(flags == URL_WRONLY || flags == URL_RDONLY);
-#endif
+ assert(flags == AVIO_FLAG_WRITE || flags == AVIO_FLAG_READ);
- if (flags & URL_WRONLY) {
+ if (flags & AVIO_FLAG_WRITE) {
s->buf_end = s->buffer + s->buffer_size;
s->write_flag = 1;
} else {
}
int avio_open(AVIOContext **s, const char *filename, int flags)
+{
+ return avio_open2(s, filename, flags, NULL, NULL);
+}
+
+int avio_open2(AVIOContext **s, const char *filename, int flags,
+ const AVIOInterruptCB *int_cb, AVDictionary **options)
{
URLContext *h;
int err;
- err = ffurl_open(&h, filename, flags);
+ err = ffurl_open(&h, filename, flags, int_cb, options);
if (err < 0)
return err;
err = ffio_fdopen(s, h);
if (err < 0) {
- url_close(h);
+ ffurl_close(h);
return err;
}
return 0;
int avio_close(AVIOContext *s)
{
- URLContext *h = s->opaque;
+ URLContext *h;
- av_free(s->buffer);
+ if (!s)
+ return 0;
+
+ avio_flush(s);
+ h = s->opaque;
+ av_freep(&s->buffer);
av_free(s);
- return url_close(h);
+ return ffurl_close(h);
}
-#if FF_API_OLD_AVIO
-URLContext *url_fileno(AVIOContext *s)
+int avio_closep(AVIOContext **s)
{
- return s->opaque;
+ int ret = avio_close(*s);
+ *s = NULL;
+ return ret;
}
-#endif
int avio_printf(AVIOContext *s, const char *fmt, ...)
{
return ret;
}
-#if FF_API_OLD_AVIO
-char *url_fgets(AVIOContext *s, char *buf, int buf_size)
-{
- int c;
- char *q;
-
- c = avio_r8(s);
- if (s->eof_reached)
- return NULL;
- q = buf;
- for(;;) {
- if (s->eof_reached || c == '\n')
- break;
- if ((q - buf) < buf_size - 1)
- *q++ = c;
- c = avio_r8(s);
- }
- if (buf_size > 0)
- *q = '\0';
- return buf;
-}
-
-int url_fget_max_packet_size(AVIOContext *s)
-{
- return s->max_packet_size;
-}
-#endif
-
-int ffio_read_pause(AVIOContext *s, int pause)
+int avio_pause(AVIOContext *s, int pause)
{
if (!s->read_pause)
return AVERROR(ENOSYS);
return s->read_pause(s->opaque, pause);
}
-int64_t ffio_read_seek(AVIOContext *s, int stream_index,
+int64_t avio_seek_time(AVIOContext *s, int stream_index,
int64_t timestamp, int flags)
{
URLContext *h = s->opaque;
if (!s->read_seek)
return AVERROR(ENOSYS);
ret = s->read_seek(h, stream_index, timestamp, flags);
- if(ret >= 0) {
+ if (ret >= 0) {
int64_t pos;
s->buf_ptr = s->buf_end; // Flush buffer
pos = s->seek(h, 0, SEEK_CUR);
return ret;
}
-/* avio_open_dyn_buf and avio_close_dyn_buf are used in rtp.c to send a response
- * back to the server even if CONFIG_MUXERS is false. */
-#if CONFIG_MUXERS || CONFIG_NETWORK
-/* buffer handling */
-#if FF_API_OLD_AVIO
-int url_open_buf(AVIOContext **s, uint8_t *buf, int buf_size, int flags)
-{
- int ret;
- *s = av_mallocz(sizeof(AVIOContext));
- if(!*s)
- return AVERROR(ENOMEM);
- ret = ffio_init_context(*s, buf, buf_size,
- (flags & URL_WRONLY || flags & URL_RDWR),
- NULL, NULL, NULL, NULL);
- if(ret != 0)
- av_freep(s);
- return ret;
-}
-
-int url_close_buf(AVIOContext *s)
-{
- avio_flush(s);
- return s->buf_ptr - s->buffer;
-}
-#endif
-
/* output in a dynamic buffer */
typedef struct DynBuffer {
/* reallocate buffer if needed */
new_size = d->pos + buf_size;
new_allocated_size = d->allocated_size;
- if(new_size < d->pos || new_size > INT_MAX/2)
+ if (new_size < d->pos || new_size > INT_MAX/2)
return -1;
while (new_size > new_allocated_size) {
if (!new_allocated_size)
}
if (new_allocated_size > d->allocated_size) {
- d->buffer = av_realloc(d->buffer, new_allocated_size);
- if(d->buffer == NULL)
- return AVERROR(ENOMEM);
+ int err;
+ if ((err = av_reallocp(&d->buffer, new_allocated_size)) < 0) {
+ d->allocated_size = 0;
+ d->size = 0;
+ return err;
+ }
d->allocated_size = new_allocated_size;
}
memcpy(d->buffer + d->pos, buf, buf_size);
/* packetized write: output the header */
AV_WB32(buf1, buf_size);
- ret= dyn_buf_write(opaque, buf1, 4);
- if(ret < 0)
+ ret = dyn_buf_write(opaque, buf1, 4);
+ if (ret < 0)
return ret;
/* then the data */
DynBuffer *d;
unsigned io_buffer_size = max_packet_size ? max_packet_size : 1024;
- if(sizeof(DynBuffer) + io_buffer_size < io_buffer_size)
+ if (sizeof(DynBuffer) + io_buffer_size < io_buffer_size)
return -1;
d = av_mallocz(sizeof(DynBuffer) + io_buffer_size);
if (!d)
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
{
- DynBuffer *d = s->opaque;
+ DynBuffer *d;
int size;
- static const char padbuf[FF_INPUT_BUFFER_PADDING_SIZE] = {0};
+ static const char padbuf[AV_INPUT_BUFFER_PADDING_SIZE] = {0};
int padding = 0;
+ if (!s) {
+ *pbuffer = NULL;
+ return 0;
+ }
+
/* don't attempt to pad fixed-size packet buffers */
if (!s->max_packet_size) {
avio_write(s, padbuf, sizeof(padbuf));
- padding = FF_INPUT_BUFFER_PADDING_SIZE;
+ padding = AV_INPUT_BUFFER_PADDING_SIZE;
}
avio_flush(s);
+ d = s->opaque;
*pbuffer = d->buffer;
size = d->size;
av_free(d);
av_free(s);
return size - padding;
}
-#endif /* CONFIG_MUXERS || CONFIG_NETWORK */
+
+void ffio_free_dyn_buf(AVIOContext **s)
+{
+ uint8_t *tmp;
+ if (!*s)
+ return;
+ avio_close_dyn_buf(*s, &tmp);
+ av_free(tmp);
+ *s = NULL;
+}
+
+static int null_buf_write(void *opaque, uint8_t *buf, int buf_size)
+{
+ DynBuffer *d = opaque;
+
+ d->pos += buf_size;
+ if (d->pos > d->size)
+ d->size = d->pos;
+ return buf_size;
+}
+
+int ffio_open_null_buf(AVIOContext **s)
+{
+ int ret = url_open_dyn_buf_internal(s, 0);
+ if (ret >= 0) {
+ AVIOContext *pb = *s;
+ pb->write_packet = null_buf_write;
+ }
+ return ret;
+}
+
+int ffio_close_null_buf(AVIOContext *s)
+{
+ DynBuffer *d = s->opaque;
+ int size;
+
+ avio_flush(s);
+
+ size = d->size;
+ av_free(d);
+ av_free(s);
+ return size;
+}
projects / ffmpeg / blobdiff