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Extend ByteIOContext and add the buffered IO functions:

Browse Source 
av_url_read_fplay(), av_url_read_fpause() and av_url_read_fseek().

patch by: Björn Axelsson, bjorn d axelsson a intinor d se

Originally committed as revision 11110 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Björn Axelsson 2007-11-28 19:46:49 +00:00 committed by Andreas Öman
parent 6b493b2f2f
commit e7e4810aae
2 changed files with 46 additions and 0 deletions
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9
libavformat/avio.h
View File

@ -156,6 +156,10 @@ typedef struct {
unsigned char *checksum_ptr;
unsigned long (*update_checksum)(unsigned long checksum, const uint8_t *buf, unsigned int size);
int error; ///< contains the error code or 0 if no error happened
int (*read_play)(void *opaque);
int (*read_pause)(void *opaque);
int (*read_seek)(void *opaque,
int stream_index, int64_t timestamp, int flags);
} ByteIOContext;
int init_put_byte(ByteIOContext *s,
@ -188,6 +192,11 @@ offset_t url_fsize(ByteIOContext *s);
int url_feof(ByteIOContext *s);
int url_ferror(ByteIOContext *s);
int av_url_read_fplay(ByteIOContext *h);
int av_url_read_fpause(ByteIOContext *h);
int av_url_read_fseek(ByteIOContext *h,
int stream_index, int64_t timestamp, int flags);
#define URL_EOF (-1)
/** @note return URL_EOF (-1) if EOF */
int url_fgetc(ByteIOContext *s);

37
libavformat/aviobuf.c
View File

@ -55,6 +55,9 @@ int init_put_byte(ByteIOContext *s,
s->pos = buffer_size;
s->buf_end = s->buffer + buffer_size;
}
s->read_play = NULL;
s->read_pause = NULL;
s->read_seek = NULL;
return 0;
}
@ -551,6 +554,11 @@ int url_fdopen(ByteIOContext **s, URLContext *h)
}
(*s)->is_streamed = h->is_streamed;
(*s)->max_packet_size = max_packet_size;
if(h->prot) {
(*s)->read_play = (int (*)(void *))h->prot->url_read_play;
(*s)->read_pause = (int (*)(void *))h->prot->url_read_pause;
(*s)->read_seek = (int (*)(void *, int, int64_t, int))h->prot->url_read_seek;
}
return 0;
}
@ -656,6 +664,35 @@ int url_fget_max_packet_size(ByteIOContext *s)
return s->max_packet_size;
}
int av_url_read_fplay(ByteIOContext *s)
{
if (!s->read_play)
return AVERROR(ENOSYS);
return s->read_play(s->opaque);
}
int av_url_read_fpause(ByteIOContext *s)
{
if (!s->read_pause)
return AVERROR(ENOSYS);
return s->read_pause(s->opaque);
}
int av_url_read_fseek(ByteIOContext *s,
int stream_index, int64_t timestamp, int flags)
{
URLContext *h = s->opaque;
int 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)