forked from len0rd/rockbox
Initial opus codec support
Synchronised with opus repo on github (https://github.com/freqmod/rockbox-opus) Status: * Seeking ported from speex, but fails on some cases (e.g. seek to granule 0) * ReplayGain parsing needs to be reworked, we do vorbis-style replaygain now. http://wiki.xiph.org/OggOpus#Comment_Header explicitly forbids these in favour of R128_TRACK_GAIN tag. * No optimisation yet, source files still nearly identical to opus upstream * Multi-stream opus files may not be parsed correctly Change-Id: Ia66f1027dc1d288083e3c57b2816700078376f9a Reviewed-on: http://gerrit.rockbox.org/300 Reviewed-by: Bertrik Sikken <bertrik@sikken.nl> Tested-by: Bertrik Sikken <bertrik@sikken.nl>
This commit is contained in:
Frederik M J Vestre
Bertrik Sikken
parent
72ebcbf73b
commit
1b8e3801b2
127 changed files with 28373 additions and 2 deletions
286
lib/rbcodec/codecs/libopus/opus_header.c
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286
lib/rbcodec/codecs/libopus/opus_header.c
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/* Copyright (C)2012 Xiph.Org Foundation
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File: opus_header.c
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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# include "opus_config.h"
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#endif
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#include "opus_header.h"
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#include <string.h>
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#include <stdio.h>
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/* Header contents:
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- "OpusHead" (64 bits)
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- version number (8 bits)
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- Channels C (8 bits)
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- Pre-skip (16 bits)
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- Sampling rate (32 bits)
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- Gain in dB (16 bits, S7.8)
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- Mapping (8 bits, 0=single stream (mono/stereo) 1=Vorbis mapping,
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2..254: reserved, 255: multistream with no mapping)
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- if (mapping != 0)
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- N = totel number of streams (8 bits)
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- M = number of paired streams (8 bits)
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- C times channel origin
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- if (C<2*M)
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- stream = byte/2
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- if (byte&0x1 == 0)
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- left
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else
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- right
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- else
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- stream = byte-M
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*/
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typedef struct {
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unsigned char *data;
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int maxlen;
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int pos;
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} Packet;
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typedef struct {
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const unsigned char *data;
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int maxlen;
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int pos;
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} ROPacket;
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static int write_uint32(Packet *p, ogg_uint32_t val)
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{
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if (p->pos>p->maxlen-4)
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return 0;
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p->data[p->pos ] = (val ) & 0xFF;
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p->data[p->pos+1] = (val>> 8) & 0xFF;
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p->data[p->pos+2] = (val>>16) & 0xFF;
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p->data[p->pos+3] = (val>>24) & 0xFF;
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p->pos += 4;
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return 1;
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}
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static int write_uint16(Packet *p, ogg_uint16_t val)
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{
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if (p->pos>p->maxlen-2)
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return 0;
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p->data[p->pos ] = (val ) & 0xFF;
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p->data[p->pos+1] = (val>> 8) & 0xFF;
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p->pos += 2;
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return 1;
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}
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static int write_chars(Packet *p, const unsigned char *str, int nb_chars)
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{
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int i;
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if (p->pos>p->maxlen-nb_chars)
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return 0;
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for (i=0;i<nb_chars;i++)
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p->data[p->pos++] = str[i];
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return 1;
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}
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static int read_uint32(ROPacket *p, ogg_uint32_t *val)
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{
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if (p->pos>p->maxlen-4)
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return 0;
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*val = (ogg_uint32_t)p->data[p->pos ];
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*val |= (ogg_uint32_t)p->data[p->pos+1]<< 8;
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*val |= (ogg_uint32_t)p->data[p->pos+2]<<16;
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*val |= (ogg_uint32_t)p->data[p->pos+3]<<24;
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p->pos += 4;
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return 1;
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}
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static int read_uint16(ROPacket *p, ogg_uint16_t *val)
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{
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if (p->pos>p->maxlen-2)
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return 0;
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*val = (ogg_uint16_t)p->data[p->pos ];
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*val |= (ogg_uint16_t)p->data[p->pos+1]<<8;
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p->pos += 2;
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return 1;
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}
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static int read_chars(ROPacket *p, unsigned char *str, int nb_chars)
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{
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int i;
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if (p->pos>p->maxlen-nb_chars)
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return 0;
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for (i=0;i<nb_chars;i++)
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str[i] = p->data[p->pos++];
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return 1;
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}
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int opus_header_parse(const unsigned char *packet, int len, OpusHeader *h)
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{
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int i;
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char str[9];
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ROPacket p;
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unsigned char ch;
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ogg_uint16_t shortval;
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p.data = packet;
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p.maxlen = len;
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p.pos = 0;
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str[8] = 0;
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if (len<19)return 0;
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read_chars(&p, (unsigned char*)str, 8);
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if (memcmp(str, "OpusHead", 8)!=0)
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return 0;
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if (!read_chars(&p, &ch, 1))
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return 0;
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h->version = ch;
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if((h->version&240) != 0) /* Only major version 0 supported. */
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return 0;
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if (!read_chars(&p, &ch, 1))
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return 0;
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h->channels = ch;
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if (h->channels == 0)
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return 0;
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if (!read_uint16(&p, &shortval))
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return 0;
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h->preskip = shortval;
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if (!read_uint32(&p, &h->input_sample_rate))
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return 0;
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if (!read_uint16(&p, &shortval))
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return 0;
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h->gain = (short)shortval;
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if (!read_chars(&p, &ch, 1))
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return 0;
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h->channel_mapping = ch;
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if (h->channel_mapping != 0)
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{
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if (!read_chars(&p, &ch, 1))
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return 0;
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if (ch<1)
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return 0;
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h->nb_streams = ch;
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if (!read_chars(&p, &ch, 1))
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return 0;
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if (ch>h->nb_streams || (ch+h->nb_streams)>255)
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return 0;
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h->nb_coupled = ch;
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/* Multi-stream support */
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for (i=0;i<h->channels;i++)
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{
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if (!read_chars(&p, &h->stream_map[i], 1))
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return 0;
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if (h->stream_map[i]>(h->nb_streams+h->nb_coupled) && h->stream_map[i]!=255)
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return 0;
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}
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} else {
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if(h->channels>2)
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return 0;
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h->nb_streams = 1;
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h->nb_coupled = h->channels>1;
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h->stream_map[0]=0;
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h->stream_map[1]=1;
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}
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/*For version 0/1 we know there won't be any more data
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so reject any that have data past the end.*/
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if ((h->version==0 || h->version==1) && p.pos != len)
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return 0;
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return 1;
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}
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int opus_header_to_packet(const OpusHeader *h, unsigned char *packet, int len)
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{
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int i;
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Packet p;
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unsigned char ch;
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p.data = packet;
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p.maxlen = len;
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p.pos = 0;
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if (len<19)return 0;
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if (!write_chars(&p, (const unsigned char*)"OpusHead", 8))
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return 0;
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/* Version is 1 */
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ch = 1;
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if (!write_chars(&p, &ch, 1))
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return 0;
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ch = h->channels;
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if (!write_chars(&p, &ch, 1))
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return 0;
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if (!write_uint16(&p, h->preskip))
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return 0;
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if (!write_uint32(&p, h->input_sample_rate))
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return 0;
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if (!write_uint16(&p, h->gain))
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return 0;
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ch = h->channel_mapping;
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if (!write_chars(&p, &ch, 1))
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return 0;
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if (h->channel_mapping != 0)
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{
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ch = h->nb_streams;
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if (!write_chars(&p, &ch, 1))
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return 0;
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ch = h->nb_coupled;
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if (!write_chars(&p, &ch, 1))
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return 0;
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/* Multi-stream support */
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for (i=0;i<h->channels;i++)
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{
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if (!write_chars(&p, &h->stream_map[i], 1))
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return 0;
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}
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}
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return p.pos;
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}
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/* This is just here because it's a convenient file linked by both opusenc and
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opusdec (to guarantee this maps stays in sync). */
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const int wav_permute_matrix[8][8] =
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{
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{0}, /* 1.0 mono */
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{0,1}, /* 2.0 stereo */
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{0,2,1}, /* 3.0 channel ('wide') stereo */
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{0,1,2,3}, /* 4.0 discrete quadraphonic */
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{0,2,1,3,4}, /* 5.0 surround */
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{0,2,1,4,5,3}, /* 5.1 surround */
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{0,2,1,5,6,4,3}, /* 6.1 surround */
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{0,2,1,6,7,4,5,3} /* 7.1 surround (classic theater 8-track) */
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};
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