---
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/sbc_parser.c | 124 ++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 126 insertions(+)
create mode 100644 libavcodec/sbc_parser.c
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index c46d102227..58c8c6e499 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1012,6 +1012,7 @@ OBJS-$(CONFIG_PNG_PARSER) += png_parser.o
OBJS-$(CONFIG_PNM_PARSER) += pnm_parser.o pnm.o
OBJS-$(CONFIG_RV30_PARSER) += rv34_parser.o
OBJS-$(CONFIG_RV40_PARSER) += rv34_parser.o
+OBJS-$(CONFIG_SBC_PARSER) += sbc_parser.o
OBJS-$(CONFIG_SIPR_PARSER) += sipr_parser.o
OBJS-$(CONFIG_TAK_PARSER) += tak_parser.o tak.o
OBJS-$(CONFIG_VC1_PARSER) += vc1_parser.o vc1.o vc1data.o \
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 9e2480d2d4..3e3b37f638 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -653,6 +653,7 @@ static void register_all(void)
REGISTER_PARSER(PNM, pnm);
REGISTER_PARSER(RV30, rv30);
REGISTER_PARSER(RV40, rv40);
+ REGISTER_PARSER(SBC, sbc);
REGISTER_PARSER(SIPR, sipr);
REGISTER_PARSER(TAK, tak);
REGISTER_PARSER(VC1, vc1);
diff --git a/libavcodec/sbc_parser.c b/libavcodec/sbc_parser.c
new file mode 100644
index 0000000000..032f72cf2b
--- /dev/null
+++ b/libavcodec/sbc_parser.c
@@ -0,0 +1,124 @@
+/*
+ * SBC parser
+ *
+ * Copyright (C) 2017 Aurelien Jacobs <au...@gnuage.org>
+ *
+ * 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 "sbc.h"
+#include "parser.h"
+
+typedef struct SBCParseContext {
+ ParseContext pc;
+ uint8_t header[3];
+ int header_size;
+ int buffered_size;
+} SBCParseContext;
+
+static int sbc_parse_header(AVCodecParserContext *s, AVCodecContext *avctx,
+ const uint8_t *data, size_t len)
+{
+ static const int sample_rates[4] = { 16000, 32000, 44100, 48000 };
+ int sr, blocks, mode, subbands, bitpool, channels, joint;
+ int length;
+
+ if (len < 3)
+ return -1;
+
+ if (data[0] == MSBC_SYNCWORD && data[1] == 0 && data[2] == 0) {
+ avctx->channels = 1;
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+ avctx->sample_rate = 16000;
+ avctx->frame_size = 120;
+ s->duration = avctx->frame_size;
+ return 57;
+ }
+
+ if (data[0] != SBC_SYNCWORD)
+ return -2;
+
+ sr = (data[1] >> 6) & 0x03;
+ blocks = (((data[1] >> 4) & 0x03) + 1) << 2;
+ mode = (data[1] >> 2) & 0x03;
+ subbands = (((data[1] >> 0) & 0x01) + 1) << 2;
+ bitpool = data[2];
+
+ channels = mode == SBC_MODE_MONO ? 1 : 2;
+ joint = mode == SBC_MODE_JOINT_STEREO;
+
+ length = 4 + (subbands * channels) / 2;
+ if (channels == 1 || mode == SBC_MODE_DUAL_CHANNEL)
+ length += ((channels * blocks * bitpool) + 7) / 8;
+ else
+ length += (((joint ? subbands : 0) + blocks * bitpool) + 7) / 8;
+
+ avctx->channels = channels;
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+ avctx->sample_rate = sample_rates[sr];
+ avctx->frame_size = subbands * blocks;
+ s->duration = avctx->frame_size;
+ return length;
+}
+
+static int sbc_parse(AVCodecParserContext *s, AVCodecContext *avctx,
+ const uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size)
+{
+ SBCParseContext *pc = s->priv_data;
+ int next;
+
+ if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
+ next = buf_size;
+ } else {
+ if (pc->header_size) {
+ memcpy(pc->header + pc->header_size, buf,
+ sizeof(pc->header) - pc->header_size);
+ next = sbc_parse_header(s, avctx, pc->header, sizeof(pc->header))
+ - pc->buffered_size;
+ pc->header_size = 0;
+ } else {
+ next = sbc_parse_header(s, avctx, buf, buf_size);
+ if (next >= buf_size)
+ next = -1;
+ }
+
+ if (next < 0) {
+ pc->header_size = FFMIN(sizeof(pc->header), buf_size);
+ memcpy(pc->header, buf, pc->header_size);
+ pc->buffered_size = buf_size;
+ next = END_NOT_FOUND;
+ }
+
+ if (ff_combine_frame(&pc->pc, next, &buf, &buf_size) < 0) {
+ *poutbuf = NULL;
+ *poutbuf_size = 0;
+ return buf_size;
+ }
+ }
+
+ *poutbuf = buf;
+ *poutbuf_size = buf_size;
+ return next;
+}
+
+AVCodecParser ff_sbc_parser = {
+ .codec_ids = { AV_CODEC_ID_SBC, AV_CODEC_ID_MSBC },
+ .priv_data_size = sizeof(SBCParseContext),
+ .parser_parse = sbc_parse,
+ .parser_close = ff_parse_close,
+};
--
2.15.1
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