[FFmpeg-cvslog] Ogg: add support for Xiph's CELT (Opus) codec.
Nicolas George
git at videolan.org
Tue Apr 19 16:12:26 CEST 2011
ffmpeg | branch: master | Nicolas George <nicolas.george at normalesup.org> | Fri Apr 15 19:18:04 2011 +0200| [e61b83d29e1b273a7d4d1d982aac68cf26a0a3ee] | committer: Nicolas George
Ogg: add support for Xiph's CELT (Opus) codec.
This patch also introduces CODEC_ID_CELT.
Signed-off-by: Nicolas George <nicolas.george at normalesup.org>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e61b83d29e1b273a7d4d1d982aac68cf26a0a3ee
---
libavcodec/avcodec.h | 1 +
libavformat/Makefile | 1 +
libavformat/oggdec.c | 1 +
libavformat/oggdec.h | 1 +
libavformat/oggparsecelt.c | 99 ++++++++++++++++++++++++++++++++++++++++++++
libavformat/utils.c | 3 +-
6 files changed, 105 insertions(+), 1 deletions(-)
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 07bae87..33ae031 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -342,6 +342,7 @@ enum CodecID {
CODEC_ID_BINKAUDIO_DCT,
CODEC_ID_AAC_LATM,
CODEC_ID_QDMC,
+ CODEC_ID_CELT,
/* subtitle codecs */
CODEC_ID_DVD_SUBTITLE= 0x17000,
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 18f8c49..20b5092 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -164,6 +164,7 @@ OBJS-$(CONFIG_NUT_DEMUXER) += nutdec.o nut.o riff.o
OBJS-$(CONFIG_NUT_MUXER) += nutenc.o nut.o riff.o
OBJS-$(CONFIG_NUV_DEMUXER) += nuv.o riff.o
OBJS-$(CONFIG_OGG_DEMUXER) += oggdec.o \
+ oggparsecelt.o \
oggparsedirac.o \
oggparseflac.o \
oggparseogm.o \
diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c
index 100519b..2f76ec8 100644
--- a/libavformat/oggdec.c
+++ b/libavformat/oggdec.c
@@ -45,6 +45,7 @@ static const struct ogg_codec * const ogg_codecs[] = {
&ff_vorbis_codec,
&ff_theora_codec,
&ff_flac_codec,
+ &ff_celt_codec,
&ff_old_dirac_codec,
&ff_old_flac_codec,
&ff_ogm_video_codec,
diff --git a/libavformat/oggdec.h b/libavformat/oggdec.h
index 7d66cd5..82efd97 100644
--- a/libavformat/oggdec.h
+++ b/libavformat/oggdec.h
@@ -98,6 +98,7 @@ struct ogg {
#define OGG_FLAG_BOS 2
#define OGG_FLAG_EOS 4
+extern const struct ogg_codec ff_celt_codec;
extern const struct ogg_codec ff_dirac_codec;
extern const struct ogg_codec ff_flac_codec;
extern const struct ogg_codec ff_ogm_audio_codec;
diff --git a/libavformat/oggparsecelt.c b/libavformat/oggparsecelt.c
new file mode 100644
index 0000000..b3c8660
--- /dev/null
+++ b/libavformat/oggparsecelt.c
@@ -0,0 +1,99 @@
+/*
+ * Xiph CELT / Opus parser for Ogg
+ * Copyright (c) 2011 Nicolas George
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+#include "avformat.h"
+#include "oggdec.h"
+#include "libavutil/intreadwrite.h"
+
+struct oggcelt_private {
+ int extra_headers_left;
+};
+
+static int celt_header(AVFormatContext *s, int idx)
+{
+ struct ogg *ogg = s->priv_data;
+ struct ogg_stream *os = ogg->streams + idx;
+ AVStream *st = s->streams[idx];
+ struct oggcelt_private *priv = os->private;
+ uint8_t *p = os->buf + os->pstart;
+
+ if (os->psize == 60 &&
+ !memcmp(p, ff_celt_codec.magic, ff_celt_codec.magicsize)) {
+
+ /* Main header */
+
+ uint32_t version, header_size, sample_rate, nb_channels, frame_size;
+ uint32_t overlap, bytes_per_packet, extra_headers;
+ uint8_t *extradata;
+
+ extradata = av_malloc(2 * sizeof(uint32_t) +
+ FF_INPUT_BUFFER_PADDING_SIZE);
+ priv = av_malloc(sizeof(struct oggcelt_private));
+ if (!extradata || !priv) {
+ av_free(extradata);
+ av_free(priv);
+ return AVERROR(ENOMEM);
+ }
+ version = AV_RL32(p + 28);
+ header_size = AV_RL32(p + 32); /* unused */
+ sample_rate = AV_RL32(p + 36);
+ nb_channels = AV_RL32(p + 40);
+ frame_size = AV_RL32(p + 44);
+ overlap = AV_RL32(p + 48);
+ bytes_per_packet = AV_RL32(p + 52); /* unused */
+ extra_headers = AV_RL32(p + 56);
+ av_free(os->private);
+ av_free(st->codec->extradata);
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_id = CODEC_ID_CELT;
+ st->codec->sample_rate = sample_rate;
+ st->codec->channels = nb_channels;
+ st->codec->frame_size = frame_size;
+ st->codec->sample_fmt = AV_SAMPLE_FMT_S16;
+ st->codec->extradata = extradata;
+ st->codec->extradata_size = 2 * sizeof(uint32_t);
+ if (sample_rate)
+ av_set_pts_info(st, 64, 1, sample_rate);
+ priv->extra_headers_left = 1 + extra_headers;
+ os->private = priv;
+ AV_WL32(extradata + 0, overlap);
+ AV_WL32(extradata + 4, version);
+ return 1;
+
+ } else if(priv && priv->extra_headers_left) {
+
+ /* Extra headers (vorbiscomment) */
+
+ ff_vorbis_comment(s, &st->metadata, p, os->psize);
+ priv->extra_headers_left--;
+ return 1;
+
+ } else {
+ return 0;
+ }
+}
+
+const struct ogg_codec ff_celt_codec = {
+ .magic = "CELT ",
+ .magicsize = 8,
+ .header = celt_header,
+};
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 6421a33..ffb114d 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2084,7 +2084,8 @@ static int has_codec_parameters(AVCodecContext *enc)
enc->codec_id == CODEC_ID_MP1 ||
enc->codec_id == CODEC_ID_MP2 ||
enc->codec_id == CODEC_ID_MP3 ||
- enc->codec_id == CODEC_ID_SPEEX))
+ enc->codec_id == CODEC_ID_SPEEX ||
+ enc->codec_id == CODEC_ID_CELT))
return 0;
break;
case AVMEDIA_TYPE_VIDEO:
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