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Unified Diff: src/repacketizer.c

Issue 107243004: Updating Opus to release 1.1 (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/deps/third_party/opus
Patch Set: Created 7 years ago
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Index: src/repacketizer.c
diff --git a/src/repacketizer.c b/src/repacketizer.c
index 0c5d840c058e1947ff026b518541f06adfd7c55a..a62675ce940e8b2421dc547f242c51de282f8ee2 100644
--- a/src/repacketizer.c
+++ b/src/repacketizer.c
@@ -58,7 +58,7 @@ void opus_repacketizer_destroy(OpusRepacketizer *rp)
opus_free(rp);
}
-int opus_repacketizer_cat(OpusRepacketizer *rp, const unsigned char *data, opus_int32 len)
+static int opus_repacketizer_cat_impl(OpusRepacketizer *rp, const unsigned char *data, opus_int32 len, int self_delimited)
{
unsigned char tmp_toc;
int curr_nb_frames,ret;
@@ -82,24 +82,31 @@ int opus_repacketizer_cat(OpusRepacketizer *rp, const unsigned char *data, opus_
return OPUS_INVALID_PACKET;
}
- ret=opus_packet_parse(data, len, &tmp_toc, &rp->frames[rp->nb_frames], &rp->len[rp->nb_frames], NULL);
+ ret=opus_packet_parse_impl(data, len, self_delimited, &tmp_toc, &rp->frames[rp->nb_frames], &rp->len[rp->nb_frames], NULL, NULL);
if(ret<1)return ret;
rp->nb_frames += curr_nb_frames;
return OPUS_OK;
}
+int opus_repacketizer_cat(OpusRepacketizer *rp, const unsigned char *data, opus_int32 len)
+{
+ return opus_repacketizer_cat_impl(rp, data, len, 0);
+}
+
int opus_repacketizer_get_nb_frames(OpusRepacketizer *rp)
{
return rp->nb_frames;
}
-opus_int32 opus_repacketizer_out_range_impl(OpusRepacketizer *rp, int begin, int end, unsigned char *data, opus_int32 maxlen, int self_delimited)
+opus_int32 opus_repacketizer_out_range_impl(OpusRepacketizer *rp, int begin, int end,
+ unsigned char *data, opus_int32 maxlen, int self_delimited, int pad)
{
int i, count;
opus_int32 tot_size;
opus_int16 *len;
const unsigned char **frames;
+ unsigned char * ptr;
if (begin<0 || begin>=end || end>rp->nb_frames)
{
@@ -115,18 +122,15 @@ opus_int32 opus_repacketizer_out_range_impl(OpusRepacketizer *rp, int begin, int
else
tot_size = 0;
- switch (count)
- {
- case 1:
+ ptr = data;
+ if (count==1)
{
/* Code 0 */
tot_size += len[0]+1;
if (tot_size > maxlen)
return OPUS_BUFFER_TOO_SMALL;
- *data++ = rp->toc&0xFC;
- }
- break;
- case 2:
+ *ptr++ = rp->toc&0xFC;
+ } else if (count==2)
{
if (len[1] == len[0])
{
@@ -134,22 +138,28 @@ opus_int32 opus_repacketizer_out_range_impl(OpusRepacketizer *rp, int begin, int
tot_size += 2*len[0]+1;
if (tot_size > maxlen)
return OPUS_BUFFER_TOO_SMALL;
- *data++ = (rp->toc&0xFC) | 0x1;
+ *ptr++ = (rp->toc&0xFC) | 0x1;
} else {
/* Code 2 */
tot_size += len[0]+len[1]+2+(len[0]>=252);
if (tot_size > maxlen)
return OPUS_BUFFER_TOO_SMALL;
- *data++ = (rp->toc&0xFC) | 0x2;
- data += encode_size(len[0], data);
+ *ptr++ = (rp->toc&0xFC) | 0x2;
+ ptr += encode_size(len[0], ptr);
}
}
- break;
- default:
+ if (count > 2 || (pad && tot_size < maxlen))
{
/* Code 3 */
int vbr;
+ int pad_amount=0;
+ /* Restart the process for the padding case */
+ ptr = data;
+ if (self_delimited)
+ tot_size = 1 + (len[count-1]>=252);
+ else
+ tot_size = 0;
vbr = 0;
for (i=1;i<count;i++)
{
@@ -168,41 +178,168 @@ opus_int32 opus_repacketizer_out_range_impl(OpusRepacketizer *rp, int begin, int
if (tot_size > maxlen)
return OPUS_BUFFER_TOO_SMALL;
- *data++ = (rp->toc&0xFC) | 0x3;
- *data++ = count | 0x80;
- for (i=0;i<count-1;i++)
- data += encode_size(len[i], data);
+ *ptr++ = (rp->toc&0xFC) | 0x3;
+ *ptr++ = count | 0x80;
} else {
tot_size += count*len[0]+2;
if (tot_size > maxlen)
return OPUS_BUFFER_TOO_SMALL;
- *data++ = (rp->toc&0xFC) | 0x3;
- *data++ = count;
+ *ptr++ = (rp->toc&0xFC) | 0x3;
+ *ptr++ = count;
+ }
+ pad_amount = pad ? (maxlen-tot_size) : 0;
+ if (pad_amount != 0)
+ {
+ int nb_255s;
+ data[1] |= 0x40;
+ nb_255s = (pad_amount-1)/255;
+ for (i=0;i<nb_255s;i++)
+ *ptr++ = 255;
+ *ptr++ = pad_amount-255*nb_255s-1;
+ tot_size += pad_amount;
+ }
+ if (vbr)
+ {
+ for (i=0;i<count-1;i++)
+ ptr += encode_size(len[i], ptr);
}
- }
- break;
}
if (self_delimited) {
- int sdlen = encode_size(len[count-1], data);
- data += sdlen;
+ int sdlen = encode_size(len[count-1], ptr);
+ ptr += sdlen;
}
/* Copy the actual data */
for (i=0;i<count;i++)
{
- OPUS_COPY(data, frames[i], len[i]);
- data += len[i];
+ /* Using OPUS_MOVE() instead of OPUS_COPY() in case we're doing in-place
+ padding from opus_packet_pad or opus_packet_unpad(). */
+ celt_assert(frames[i] + len[i] <= data || ptr <= frames[i]);
+ OPUS_MOVE(ptr, frames[i], len[i]);
+ ptr += len[i];
+ }
+ if (pad)
+ {
+ for (i=ptr-data;i<maxlen;i++)
+ data[i] = 0;
}
return tot_size;
}
opus_int32 opus_repacketizer_out_range(OpusRepacketizer *rp, int begin, int end, unsigned char *data, opus_int32 maxlen)
{
- return opus_repacketizer_out_range_impl(rp, begin, end, data, maxlen, 0);
+ return opus_repacketizer_out_range_impl(rp, begin, end, data, maxlen, 0, 0);
}
opus_int32 opus_repacketizer_out(OpusRepacketizer *rp, unsigned char *data, opus_int32 maxlen)
{
- return opus_repacketizer_out_range_impl(rp, 0, rp->nb_frames, data, maxlen, 0);
+ return opus_repacketizer_out_range_impl(rp, 0, rp->nb_frames, data, maxlen, 0, 0);
}
+int opus_packet_pad(unsigned char *data, opus_int32 len, opus_int32 new_len)
+{
+ OpusRepacketizer rp;
+ opus_int32 ret;
+ if (len < 1)
+ return OPUS_BAD_ARG;
+ if (len==new_len)
+ return OPUS_OK;
+ else if (len > new_len)
+ return OPUS_BAD_ARG;
+ opus_repacketizer_init(&rp);
+ /* Moving payload to the end of the packet so we can do in-place padding */
+ OPUS_MOVE(data+new_len-len, data, len);
+ opus_repacketizer_cat(&rp, data+new_len-len, len);
+ ret = opus_repacketizer_out_range_impl(&rp, 0, rp.nb_frames, data, new_len, 0, 1);
+ if (ret > 0)
+ return OPUS_OK;
+ else
+ return ret;
+}
+
+opus_int32 opus_packet_unpad(unsigned char *data, opus_int32 len)
+{
+ OpusRepacketizer rp;
+ opus_int32 ret;
+ if (len < 1)
+ return OPUS_BAD_ARG;
+ opus_repacketizer_init(&rp);
+ ret = opus_repacketizer_cat(&rp, data, len);
+ if (ret < 0)
+ return ret;
+ ret = opus_repacketizer_out_range_impl(&rp, 0, rp.nb_frames, data, len, 0, 0);
+ celt_assert(ret > 0 && ret <= len);
+ return ret;
+}
+
+int opus_multistream_packet_pad(unsigned char *data, opus_int32 len, opus_int32 new_len, int nb_streams)
+{
+ int s;
+ int count;
+ unsigned char toc;
+ opus_int16 size[48];
+ opus_int32 packet_offset;
+ opus_int32 amount;
+
+ if (len < 1)
+ return OPUS_BAD_ARG;
+ if (len==new_len)
+ return OPUS_OK;
+ else if (len > new_len)
+ return OPUS_BAD_ARG;
+ amount = new_len - len;
+ /* Seek to last stream */
+ for (s=0;s<nb_streams-1;s++)
+ {
+ if (len<=0)
+ return OPUS_INVALID_PACKET;
+ count = opus_packet_parse_impl(data, len, 1, &toc, NULL,
+ size, NULL, &packet_offset);
+ if (count<0)
+ return count;
+ data += packet_offset;
+ len -= packet_offset;
+ }
+ return opus_packet_pad(data, len, len+amount);
+}
+
+opus_int32 opus_multistream_packet_unpad(unsigned char *data, opus_int32 len, int nb_streams)
+{
+ int s;
+ unsigned char toc;
+ opus_int16 size[48];
+ opus_int32 packet_offset;
+ OpusRepacketizer rp;
+ unsigned char *dst;
+ opus_int32 dst_len;
+
+ if (len < 1)
+ return OPUS_BAD_ARG;
+ dst = data;
+ dst_len = 0;
+ /* Unpad all frames */
+ for (s=0;s<nb_streams;s++)
+ {
+ opus_int32 ret;
+ int self_delimited = s!=nb_streams-1;
+ if (len<=0)
+ return OPUS_INVALID_PACKET;
+ opus_repacketizer_init(&rp);
+ ret = opus_packet_parse_impl(data, len, self_delimited, &toc, NULL,
+ size, NULL, &packet_offset);
+ if (ret<0)
+ return ret;
+ ret = opus_repacketizer_cat_impl(&rp, data, packet_offset, self_delimited);
+ if (ret < 0)
+ return ret;
+ ret = opus_repacketizer_out_range_impl(&rp, 0, rp.nb_frames, dst, len, self_delimited, 0);
+ if (ret < 0)
+ return ret;
+ else
+ dst_len += ret;
+ dst += ret;
+ data += packet_offset;
+ len -= packet_offset;
+ }
+ return dst_len;
+}
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