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simplify url_fseek()
Originally committed as revision 6316 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
parent
8e06f20abf
commit
f40d17398d
@ -106,56 +106,41 @@ void put_flush_packet(ByteIOContext *s)
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offset_t url_fseek(ByteIOContext *s, offset_t offset, int whence)
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{
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offset_t offset1;
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offset_t pos= s->pos - (s->write_flag ? 0 : (s->buf_end - s->buffer));
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if (whence != SEEK_CUR && whence != SEEK_SET)
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return -EINVAL;
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if (whence == SEEK_CUR) {
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offset1 = pos + (s->buf_ptr - s->buffer);
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if (offset == 0)
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return offset1;
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offset += offset1;
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}
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offset1 = offset - pos;
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if (!s->must_flush &&
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offset1 >= 0 && offset1 < (s->buf_end - s->buffer)) {
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/* can do the seek inside the buffer */
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s->buf_ptr = s->buffer + offset1;
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} else {
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if (!s->seek)
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return -EPIPE;
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#ifdef CONFIG_MUXERS
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if (s->write_flag) {
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if (whence == SEEK_CUR) {
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offset1 = s->pos + (s->buf_ptr - s->buffer);
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if (offset == 0)
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return offset1;
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offset += offset1;
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}
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offset1 = offset - s->pos;
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if (!s->must_flush &&
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offset1 >= 0 && offset1 < (s->buf_end - s->buffer)) {
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/* can do the seek inside the buffer */
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s->buf_ptr = s->buffer + offset1;
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} else {
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if (!s->seek)
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return -EPIPE;
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if (s->write_flag) {
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flush_buffer(s);
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s->must_flush = 1;
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s->buf_ptr = s->buffer;
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s->seek(s->opaque, offset, SEEK_SET);
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s->pos = offset;
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}
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} else
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} else
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#endif //CONFIG_MUXERS
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{
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if (whence == SEEK_CUR) {
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offset1 = s->pos - (s->buf_end - s->buffer) + (s->buf_ptr - s->buffer);
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if (offset == 0)
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return offset1;
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offset += offset1;
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}
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offset1 = offset - (s->pos - (s->buf_end - s->buffer));
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if (offset1 >= 0 && offset1 <= (s->buf_end - s->buffer)) {
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/* can do the seek inside the buffer */
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s->buf_ptr = s->buffer + offset1;
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} else {
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if (!s->seek)
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return -EPIPE;
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s->buf_ptr = s->buffer;
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{
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s->buf_end = s->buffer;
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if (s->seek(s->opaque, offset, SEEK_SET) == (offset_t)-EPIPE)
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return -EPIPE;
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s->pos = offset;
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}
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s->eof_reached = 0;
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s->buf_ptr = s->buffer;
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if (s->seek(s->opaque, offset, SEEK_SET) == (offset_t)-EPIPE)
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return -EPIPE;
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s->pos = offset;
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}
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s->eof_reached = 0;
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return offset;
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}
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