summaryrefslogtreecommitdiffstats
path: root/media/libopus/src/opus_multistream_decoder.c
diff options
context:
space:
mode:
Diffstat (limited to 'media/libopus/src/opus_multistream_decoder.c')
-rw-r--r--media/libopus/src/opus_multistream_decoder.c537
1 files changed, 537 insertions, 0 deletions
diff --git a/media/libopus/src/opus_multistream_decoder.c b/media/libopus/src/opus_multistream_decoder.c
new file mode 100644
index 000000000..b95eaa6ea
--- /dev/null
+++ b/media/libopus/src/opus_multistream_decoder.c
@@ -0,0 +1,537 @@
+/* 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_multistream.h"
+#include "opus.h"
+#include "opus_private.h"
+#include "stack_alloc.h"
+#include <stdarg.h>
+#include "float_cast.h"
+#include "os_support.h"
+
+struct OpusMSDecoder {
+ ChannelLayout layout;
+ /* Decoder states go here */
+};
+
+
+
+
+/* DECODER */
+
+opus_int32 opus_multistream_decoder_get_size(int nb_streams, int nb_coupled_streams)
+{
+ int coupled_size;
+ int mono_size;
+
+ if(nb_streams<1||nb_coupled_streams>nb_streams||nb_coupled_streams<0)return 0;
+ coupled_size = opus_decoder_get_size(2);
+ mono_size = opus_decoder_get_size(1);
+ return align(sizeof(OpusMSDecoder))
+ + nb_coupled_streams * align(coupled_size)
+ + (nb_streams-nb_coupled_streams) * align(mono_size);
+}
+
+int opus_multistream_decoder_init(
+ OpusMSDecoder *st,
+ opus_int32 Fs,
+ int channels,
+ int streams,
+ int coupled_streams,
+ const unsigned char *mapping
+)
+{
+ int coupled_size;
+ int mono_size;
+ int i, ret;
+ char *ptr;
+
+ if ((channels>255) || (channels<1) || (coupled_streams>streams) ||
+ (streams<1) || (coupled_streams<0) || (streams>255-coupled_streams))
+ return OPUS_BAD_ARG;
+
+ st->layout.nb_channels = channels;
+ st->layout.nb_streams = streams;
+ st->layout.nb_coupled_streams = coupled_streams;
+
+ for (i=0;i<st->layout.nb_channels;i++)
+ st->layout.mapping[i] = mapping[i];
+ if (!validate_layout(&st->layout))
+ return OPUS_BAD_ARG;
+
+ ptr = (char*)st + align(sizeof(OpusMSDecoder));
+ coupled_size = opus_decoder_get_size(2);
+ mono_size = opus_decoder_get_size(1);
+
+ for (i=0;i<st->layout.nb_coupled_streams;i++)
+ {
+ ret=opus_decoder_init((OpusDecoder*)ptr, Fs, 2);
+ if(ret!=OPUS_OK)return ret;
+ ptr += align(coupled_size);
+ }
+ for (;i<st->layout.nb_streams;i++)
+ {
+ ret=opus_decoder_init((OpusDecoder*)ptr, Fs, 1);
+ if(ret!=OPUS_OK)return ret;
+ ptr += align(mono_size);
+ }
+ return OPUS_OK;
+}
+
+
+OpusMSDecoder *opus_multistream_decoder_create(
+ opus_int32 Fs,
+ int channels,
+ int streams,
+ int coupled_streams,
+ const unsigned char *mapping,
+ int *error
+)
+{
+ int ret;
+ OpusMSDecoder *st;
+ if ((channels>255) || (channels<1) || (coupled_streams>streams) ||
+ (streams<1) || (coupled_streams<0) || (streams>255-coupled_streams))
+ {
+ if (error)
+ *error = OPUS_BAD_ARG;
+ return NULL;
+ }
+ st = (OpusMSDecoder *)opus_alloc(opus_multistream_decoder_get_size(streams, coupled_streams));
+ if (st==NULL)
+ {
+ if (error)
+ *error = OPUS_ALLOC_FAIL;
+ return NULL;
+ }
+ ret = opus_multistream_decoder_init(st, Fs, channels, streams, coupled_streams, mapping);
+ if (error)
+ *error = ret;
+ if (ret != OPUS_OK)
+ {
+ opus_free(st);
+ st = NULL;
+ }
+ return st;
+}
+
+typedef void (*opus_copy_channel_out_func)(
+ void *dst,
+ int dst_stride,
+ int dst_channel,
+ const opus_val16 *src,
+ int src_stride,
+ int frame_size
+);
+
+static int opus_multistream_packet_validate(const unsigned char *data,
+ opus_int32 len, int nb_streams, opus_int32 Fs)
+{
+ int s;
+ int count;
+ unsigned char toc;
+ opus_int16 size[48];
+ int samples=0;
+ opus_int32 packet_offset;
+
+ for (s=0;s<nb_streams;s++)
+ {
+ int tmp_samples;
+ if (len<=0)
+ return OPUS_INVALID_PACKET;
+ count = opus_packet_parse_impl(data, len, s!=nb_streams-1, &toc, NULL,
+ size, NULL, &packet_offset);
+ if (count<0)
+ return count;
+ tmp_samples = opus_packet_get_nb_samples(data, packet_offset, Fs);
+ if (s!=0 && samples != tmp_samples)
+ return OPUS_INVALID_PACKET;
+ samples = tmp_samples;
+ data += packet_offset;
+ len -= packet_offset;
+ }
+ return samples;
+}
+
+static int opus_multistream_decode_native(
+ OpusMSDecoder *st,
+ const unsigned char *data,
+ opus_int32 len,
+ void *pcm,
+ opus_copy_channel_out_func copy_channel_out,
+ int frame_size,
+ int decode_fec,
+ int soft_clip
+)
+{
+ opus_int32 Fs;
+ int coupled_size;
+ int mono_size;
+ int s, c;
+ char *ptr;
+ int do_plc=0;
+ VARDECL(opus_val16, buf);
+ ALLOC_STACK;
+
+ /* Limit frame_size to avoid excessive stack allocations. */
+ opus_multistream_decoder_ctl(st, OPUS_GET_SAMPLE_RATE(&Fs));
+ frame_size = IMIN(frame_size, Fs/25*3);
+ ALLOC(buf, 2*frame_size, opus_val16);
+ ptr = (char*)st + align(sizeof(OpusMSDecoder));
+ coupled_size = opus_decoder_get_size(2);
+ mono_size = opus_decoder_get_size(1);
+
+ if (len==0)
+ do_plc = 1;
+ if (len < 0)
+ {
+ RESTORE_STACK;
+ return OPUS_BAD_ARG;
+ }
+ if (!do_plc && len < 2*st->layout.nb_streams-1)
+ {
+ RESTORE_STACK;
+ return OPUS_INVALID_PACKET;
+ }
+ if (!do_plc)
+ {
+ int ret = opus_multistream_packet_validate(data, len, st->layout.nb_streams, Fs);
+ if (ret < 0)
+ {
+ RESTORE_STACK;
+ return ret;
+ } else if (ret > frame_size)
+ {
+ RESTORE_STACK;
+ return OPUS_BUFFER_TOO_SMALL;
+ }
+ }
+ for (s=0;s<st->layout.nb_streams;s++)
+ {
+ OpusDecoder *dec;
+ int packet_offset, ret;
+
+ dec = (OpusDecoder*)ptr;
+ ptr += (s < st->layout.nb_coupled_streams) ? align(coupled_size) : align(mono_size);
+
+ if (!do_plc && len<=0)
+ {
+ RESTORE_STACK;
+ return OPUS_INTERNAL_ERROR;
+ }
+ packet_offset = 0;
+ ret = opus_decode_native(dec, data, len, buf, frame_size, decode_fec, s!=st->layout.nb_streams-1, &packet_offset, soft_clip);
+ data += packet_offset;
+ len -= packet_offset;
+ if (ret <= 0)
+ {
+ RESTORE_STACK;
+ return ret;
+ }
+ frame_size = ret;
+ if (s < st->layout.nb_coupled_streams)
+ {
+ int chan, prev;
+ prev = -1;
+ /* Copy "left" audio to the channel(s) where it belongs */
+ while ( (chan = get_left_channel(&st->layout, s, prev)) != -1)
+ {
+ (*copy_channel_out)(pcm, st->layout.nb_channels, chan,
+ buf, 2, frame_size);
+ prev = chan;
+ }
+ prev = -1;
+ /* Copy "right" audio to the channel(s) where it belongs */
+ while ( (chan = get_right_channel(&st->layout, s, prev)) != -1)
+ {
+ (*copy_channel_out)(pcm, st->layout.nb_channels, chan,
+ buf+1, 2, frame_size);
+ prev = chan;
+ }
+ } else {
+ int chan, prev;
+ prev = -1;
+ /* Copy audio to the channel(s) where it belongs */
+ while ( (chan = get_mono_channel(&st->layout, s, prev)) != -1)
+ {
+ (*copy_channel_out)(pcm, st->layout.nb_channels, chan,
+ buf, 1, frame_size);
+ prev = chan;
+ }
+ }
+ }
+ /* Handle muted channels */
+ for (c=0;c<st->layout.nb_channels;c++)
+ {
+ if (st->layout.mapping[c] == 255)
+ {
+ (*copy_channel_out)(pcm, st->layout.nb_channels, c,
+ NULL, 0, frame_size);
+ }
+ }
+ RESTORE_STACK;
+ return frame_size;
+}
+
+#if !defined(DISABLE_FLOAT_API)
+static void opus_copy_channel_out_float(
+ void *dst,
+ int dst_stride,
+ int dst_channel,
+ const opus_val16 *src,
+ int src_stride,
+ int frame_size
+)
+{
+ float *float_dst;
+ opus_int32 i;
+ float_dst = (float*)dst;
+ if (src != NULL)
+ {
+ for (i=0;i<frame_size;i++)
+#if defined(FIXED_POINT)
+ float_dst[i*dst_stride+dst_channel] = (1/32768.f)*src[i*src_stride];
+#else
+ float_dst[i*dst_stride+dst_channel] = src[i*src_stride];
+#endif
+ }
+ else
+ {
+ for (i=0;i<frame_size;i++)
+ float_dst[i*dst_stride+dst_channel] = 0;
+ }
+}
+#endif
+
+static void opus_copy_channel_out_short(
+ void *dst,
+ int dst_stride,
+ int dst_channel,
+ const opus_val16 *src,
+ int src_stride,
+ int frame_size
+)
+{
+ opus_int16 *short_dst;
+ opus_int32 i;
+ short_dst = (opus_int16*)dst;
+ if (src != NULL)
+ {
+ for (i=0;i<frame_size;i++)
+#if defined(FIXED_POINT)
+ short_dst[i*dst_stride+dst_channel] = src[i*src_stride];
+#else
+ short_dst[i*dst_stride+dst_channel] = FLOAT2INT16(src[i*src_stride]);
+#endif
+ }
+ else
+ {
+ for (i=0;i<frame_size;i++)
+ short_dst[i*dst_stride+dst_channel] = 0;
+ }
+}
+
+
+
+#ifdef FIXED_POINT
+int opus_multistream_decode(
+ OpusMSDecoder *st,
+ const unsigned char *data,
+ opus_int32 len,
+ opus_int16 *pcm,
+ int frame_size,
+ int decode_fec
+)
+{
+ return opus_multistream_decode_native(st, data, len,
+ pcm, opus_copy_channel_out_short, frame_size, decode_fec, 0);
+}
+
+#ifndef DISABLE_FLOAT_API
+int opus_multistream_decode_float(OpusMSDecoder *st, const unsigned char *data,
+ opus_int32 len, float *pcm, int frame_size, int decode_fec)
+{
+ return opus_multistream_decode_native(st, data, len,
+ pcm, opus_copy_channel_out_float, frame_size, decode_fec, 0);
+}
+#endif
+
+#else
+
+int opus_multistream_decode(OpusMSDecoder *st, const unsigned char *data,
+ opus_int32 len, opus_int16 *pcm, int frame_size, int decode_fec)
+{
+ return opus_multistream_decode_native(st, data, len,
+ pcm, opus_copy_channel_out_short, frame_size, decode_fec, 1);
+}
+
+int opus_multistream_decode_float(
+ OpusMSDecoder *st,
+ const unsigned char *data,
+ opus_int32 len,
+ float *pcm,
+ int frame_size,
+ int decode_fec
+)
+{
+ return opus_multistream_decode_native(st, data, len,
+ pcm, opus_copy_channel_out_float, frame_size, decode_fec, 0);
+}
+#endif
+
+int opus_multistream_decoder_ctl(OpusMSDecoder *st, int request, ...)
+{
+ va_list ap;
+ int coupled_size, mono_size;
+ char *ptr;
+ int ret = OPUS_OK;
+
+ va_start(ap, request);
+
+ coupled_size = opus_decoder_get_size(2);
+ mono_size = opus_decoder_get_size(1);
+ ptr = (char*)st + align(sizeof(OpusMSDecoder));
+ switch (request)
+ {
+ case OPUS_GET_BANDWIDTH_REQUEST:
+ case OPUS_GET_SAMPLE_RATE_REQUEST:
+ case OPUS_GET_GAIN_REQUEST:
+ case OPUS_GET_LAST_PACKET_DURATION_REQUEST:
+ {
+ OpusDecoder *dec;
+ /* For int32* GET params, just query the first stream */
+ opus_int32 *value = va_arg(ap, opus_int32*);
+ dec = (OpusDecoder*)ptr;
+ ret = opus_decoder_ctl(dec, request, value);
+ }
+ break;
+ case OPUS_GET_FINAL_RANGE_REQUEST:
+ {
+ int s;
+ opus_uint32 *value = va_arg(ap, opus_uint32*);
+ opus_uint32 tmp;
+ if (!value)
+ {
+ goto bad_arg;
+ }
+ *value = 0;
+ for (s=0;s<st->layout.nb_streams;s++)
+ {
+ OpusDecoder *dec;
+ dec = (OpusDecoder*)ptr;
+ if (s < st->layout.nb_coupled_streams)
+ ptr += align(coupled_size);
+ else
+ ptr += align(mono_size);
+ ret = opus_decoder_ctl(dec, request, &tmp);
+ if (ret != OPUS_OK) break;
+ *value ^= tmp;
+ }
+ }
+ break;
+ case OPUS_RESET_STATE:
+ {
+ int s;
+ for (s=0;s<st->layout.nb_streams;s++)
+ {
+ OpusDecoder *dec;
+
+ dec = (OpusDecoder*)ptr;
+ if (s < st->layout.nb_coupled_streams)
+ ptr += align(coupled_size);
+ else
+ ptr += align(mono_size);
+ ret = opus_decoder_ctl(dec, OPUS_RESET_STATE);
+ if (ret != OPUS_OK)
+ break;
+ }
+ }
+ break;
+ case OPUS_MULTISTREAM_GET_DECODER_STATE_REQUEST:
+ {
+ int s;
+ opus_int32 stream_id;
+ OpusDecoder **value;
+ stream_id = va_arg(ap, opus_int32);
+ if (stream_id<0 || stream_id >= st->layout.nb_streams)
+ ret = OPUS_BAD_ARG;
+ value = va_arg(ap, OpusDecoder**);
+ if (!value)
+ {
+ goto bad_arg;
+ }
+ for (s=0;s<stream_id;s++)
+ {
+ if (s < st->layout.nb_coupled_streams)
+ ptr += align(coupled_size);
+ else
+ ptr += align(mono_size);
+ }
+ *value = (OpusDecoder*)ptr;
+ }
+ break;
+ case OPUS_SET_GAIN_REQUEST:
+ {
+ int s;
+ /* This works for int32 params */
+ opus_int32 value = va_arg(ap, opus_int32);
+ for (s=0;s<st->layout.nb_streams;s++)
+ {
+ OpusDecoder *dec;
+
+ dec = (OpusDecoder*)ptr;
+ if (s < st->layout.nb_coupled_streams)
+ ptr += align(coupled_size);
+ else
+ ptr += align(mono_size);
+ ret = opus_decoder_ctl(dec, request, value);
+ if (ret != OPUS_OK)
+ break;
+ }
+ }
+ break;
+ default:
+ ret = OPUS_UNIMPLEMENTED;
+ break;
+ }
+
+ va_end(ap);
+ return ret;
+bad_arg:
+ va_end(ap);
+ return OPUS_BAD_ARG;
+}
+
+
+void opus_multistream_decoder_destroy(OpusMSDecoder *st)
+{
+ opus_free(st);
+}