| /* Copyright (c) 2011 Xiph.Org Foundation |
| Written by Jean-Marc Valin */ |
| /* |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| |
| - Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| |
| - Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER |
| OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include "opus.h" |
| #include "opus_private.h" |
| #include "os_support.h" |
| |
| |
| int opus_repacketizer_get_size(void) |
| { |
| return sizeof(OpusRepacketizer); |
| } |
| |
| OpusRepacketizer *opus_repacketizer_init(OpusRepacketizer *rp) |
| { |
| rp->nb_frames = 0; |
| return rp; |
| } |
| |
| OpusRepacketizer *opus_repacketizer_create(void) |
| { |
| OpusRepacketizer *rp; |
| rp=(OpusRepacketizer *)opus_alloc(opus_repacketizer_get_size()); |
| if(rp==NULL)return NULL; |
| return opus_repacketizer_init(rp); |
| } |
| |
| void opus_repacketizer_destroy(OpusRepacketizer *rp) |
| { |
| opus_free(rp); |
| } |
| |
| int opus_repacketizer_cat(OpusRepacketizer *rp, const unsigned char *data, opus_int32 len) |
| { |
| unsigned char tmp_toc; |
| int curr_nb_frames,ret; |
| /* Set of check ToC */ |
| if (len<1) return OPUS_INVALID_PACKET; |
| if (rp->nb_frames == 0) |
| { |
| rp->toc = data[0]; |
| rp->framesize = opus_packet_get_samples_per_frame(data, 8000); |
| } else if ((rp->toc&0xFC) != (data[0]&0xFC)) |
| { |
| /*fprintf(stderr, "toc mismatch: 0x%x vs 0x%x\n", rp->toc, data[0]);*/ |
| return OPUS_INVALID_PACKET; |
| } |
| curr_nb_frames = opus_packet_get_nb_frames(data, len); |
| if(curr_nb_frames<1) return OPUS_INVALID_PACKET; |
| |
| /* Check the 120 ms maximum packet size */ |
| if ((curr_nb_frames+rp->nb_frames)*rp->framesize > 960) |
| { |
| return OPUS_INVALID_PACKET; |
| } |
| |
| ret=opus_packet_parse(data, len, &tmp_toc, &rp->frames[rp->nb_frames], &rp->len[rp->nb_frames], NULL); |
| if(ret<1)return ret; |
| |
| rp->nb_frames += curr_nb_frames; |
| return OPUS_OK; |
| } |
| |
| 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) |
| { |
| int i, count; |
| opus_int32 tot_size; |
| opus_int16 *len; |
| const unsigned char **frames; |
| |
| if (begin<0 || begin>=end || end>rp->nb_frames) |
| { |
| /*fprintf(stderr, "%d %d %d\n", begin, end, rp->nb_frames);*/ |
| return OPUS_BAD_ARG; |
| } |
| count = end-begin; |
| |
| len = rp->len+begin; |
| frames = rp->frames+begin; |
| if (self_delimited) |
| tot_size = 1 + (len[count-1]>=252); |
| else |
| tot_size = 0; |
| |
| switch (count) |
| { |
| case 1: |
| { |
| /* Code 0 */ |
| tot_size += len[0]+1; |
| if (tot_size > maxlen) |
| return OPUS_BUFFER_TOO_SMALL; |
| *data++ = rp->toc&0xFC; |
| } |
| break; |
| case 2: |
| { |
| if (len[1] == len[0]) |
| { |
| /* Code 1 */ |
| tot_size += 2*len[0]+1; |
| if (tot_size > maxlen) |
| return OPUS_BUFFER_TOO_SMALL; |
| *data++ = (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); |
| } |
| } |
| break; |
| default: |
| { |
| /* Code 3 */ |
| int vbr; |
| |
| vbr = 0; |
| for (i=1;i<count;i++) |
| { |
| if (len[i] != len[0]) |
| { |
| vbr=1; |
| break; |
| } |
| } |
| if (vbr) |
| { |
| tot_size += 2; |
| for (i=0;i<count-1;i++) |
| tot_size += 1 + (len[i]>=252) + len[i]; |
| tot_size += len[count-1]; |
| |
| 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); |
| } else { |
| tot_size += count*len[0]+2; |
| if (tot_size > maxlen) |
| return OPUS_BUFFER_TOO_SMALL; |
| *data++ = (rp->toc&0xFC) | 0x3; |
| *data++ = count; |
| } |
| } |
| break; |
| } |
| if (self_delimited) { |
| int sdlen = encode_size(len[count-1], data); |
| data += sdlen; |
| } |
| /* Copy the actual data */ |
| for (i=0;i<count;i++) |
| { |
| OPUS_COPY(data, frames[i], len[i]); |
| data += len[i]; |
| } |
| 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); |
| } |
| |
| 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); |
| } |
| |
| |