The WAVE demuxer returns packets with many blocks per frame, which needs to be
parsed into single blocks. This has a side-effect of fixing the timestamps.
---
Changelog | 1 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/gsm.h | 31 ++++++++++++++++
libavcodec/gsm_parser.c | 79 ++++++++++++++++++++++++++++++++++++++++++
libavcodec/gsmdec_data.h | 5 ---
libavcodec/gsmdec_template.c | 1 +
libavcodec/libgsm.c | 7 +---
libavcodec/msgsmdec.c | 1 +
libavcodec/version.h | 2 +-
10 files changed, 118 insertions(+), 11 deletions(-)
create mode 100644 libavcodec/gsm.h
create mode 100644 libavcodec/gsm_parser.c
diff --git a/Changelog b/Changelog
index b098203..ac8b94e 100644
--- a/Changelog
+++ b/Changelog
@@ -5,6 +5,7 @@ releases are sorted from youngest to oldest.
version <next>:
- Automatic thread count based on detection number of (available) CPU cores
+- GSM audio parser
version 0.8_beta1:
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 741df91..1e8d09b 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -608,6 +608,7 @@ OBJS-$(CONFIG_DNXHD_PARSER) += dnxhd_parser.o
OBJS-$(CONFIG_DVBSUB_PARSER) += dvbsub_parser.o
OBJS-$(CONFIG_DVDSUB_PARSER) += dvdsub_parser.o
OBJS-$(CONFIG_FLAC_PARSER) += flac_parser.o flacdata.o flac.o
+OBJS-$(CONFIG_GSM_PARSER) += gsm_parser.o
OBJS-$(CONFIG_H261_PARSER) += h261_parser.o
OBJS-$(CONFIG_H263_PARSER) += h263_parser.o
OBJS-$(CONFIG_H264_PARSER) += h264_parser.o h264.o \
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 3980982..5289692 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -399,6 +399,7 @@ void avcodec_register_all(void)
REGISTER_PARSER (DVBSUB, dvbsub);
REGISTER_PARSER (DVDSUB, dvdsub);
REGISTER_PARSER (FLAC, flac);
+ REGISTER_PARSER (GSM, gsm);
REGISTER_PARSER (H261, h261);
REGISTER_PARSER (H263, h263);
REGISTER_PARSER (H264, h264);
diff --git a/libavcodec/gsm.h b/libavcodec/gsm.h
new file mode 100644
index 0000000..c7c3e22
--- /dev/null
+++ b/libavcodec/gsm.h
@@ -0,0 +1,31 @@
+/*
+ * GSM common header
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_GSM_H
+#define AVCODEC_GSM_H
+
+/* bytes per block */
+#define GSM_BLOCK_SIZE 33
+#define GSM_MS_BLOCK_SIZE 65
+
+/* samples per block */
+#define GSM_FRAME_SIZE 160
+
+#endif /* AVCODEC_GSM_H */
diff --git a/libavcodec/gsm_parser.c b/libavcodec/gsm_parser.c
new file mode 100644
index 0000000..a2965d3
--- /dev/null
+++ b/libavcodec/gsm_parser.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2012 Justin Ruggles
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * GSM audio parser
+ *
+ * Splits packets into individual blocks.
+ */
+
+#include "parser.h"
+#include "gsm.h"
+
+typedef struct GSMParseContext {
+ ParseContext pc;
+ int block_size;
+ int remaining;
+} GSMParseContext;
+
+static int gsm_parse(AVCodecParserContext *s1, AVCodecContext *avctx,
+ const uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size)
+{
+ GSMParseContext *s = s1->priv_data;
+ ParseContext *pc = &s->pc;
+ int next;
+
+ if (!s->block_size) {
+ switch (avctx->codec_id) {
+ case CODEC_ID_GSM: s->block_size = GSM_BLOCK_SIZE; break;
+ case CODEC_ID_GSM_MS: s->block_size = GSM_MS_BLOCK_SIZE; break;
+ default:
+ return AVERROR(EINVAL);
+ }
+ }
+
+ if (!s->remaining)
+ s->remaining = s->block_size;
+ if (s->remaining <= buf_size) {
+ next = s->remaining;
+ s->remaining = 0;
+ } else {
+ next = END_NOT_FOUND;
+ s->remaining -= buf_size;
+ }
+
+ if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) {
+ *poutbuf = NULL;
+ *poutbuf_size = 0;
+ return buf_size;
+ }
+ *poutbuf = buf;
+ *poutbuf_size = buf_size;
+ return next;
+}
+
+AVCodecParser ff_gsm_parser = {
+ .codec_ids = { CODEC_ID_GSM, CODEC_ID_GSM_MS },
+ .priv_data_size = sizeof(GSMParseContext),
+ .parser_parse = gsm_parse,
+ .parser_close = ff_parse_close,
+};
diff --git a/libavcodec/gsmdec_data.h b/libavcodec/gsmdec_data.h
index 21789f7..2ff2322 100644
--- a/libavcodec/gsmdec_data.h
+++ b/libavcodec/gsmdec_data.h
@@ -25,11 +25,6 @@
#include <stdint.h>
#include "avcodec.h"
-// input and output sizes in byte
-#define GSM_BLOCK_SIZE 33
-#define GSM_MS_BLOCK_SIZE 65
-#define GSM_FRAME_SIZE 160
-
typedef struct {
AVFrame frame;
// Contains first 120 elements from the previous frame
diff --git a/libavcodec/gsmdec_template.c b/libavcodec/gsmdec_template.c
index 7e57c71..b5222af 100644
--- a/libavcodec/gsmdec_template.c
+++ b/libavcodec/gsmdec_template.c
@@ -25,6 +25,7 @@
*/
#include "get_bits.h"
+#include "gsm.h"
#include "gsmdec_data.h"
static void apcm_dequant_add(GetBitContext *gb, int16_t *dst)
diff --git a/libavcodec/libgsm.c b/libavcodec/libgsm.c
index 16d9972..1fa04cf 100644
--- a/libavcodec/libgsm.c
+++ b/libavcodec/libgsm.c
@@ -27,13 +27,10 @@
// The idiosyncrasies of GSM-in-WAV are explained at
http://kbs.cs.tu-berlin.de/~jutta/toast.html
-#include "avcodec.h"
#include <gsm/gsm.h>
-// gsm.h misses some essential constants
-#define GSM_BLOCK_SIZE 33
-#define GSM_MS_BLOCK_SIZE 65
-#define GSM_FRAME_SIZE 160
+#include "avcodec.h"
+#include "gsm.h"
static av_cold int libgsm_encode_init(AVCodecContext *avctx) {
if (avctx->channels > 1) {
diff --git a/libavcodec/msgsmdec.c b/libavcodec/msgsmdec.c
index 1a288ee..52b0f5d 100644
--- a/libavcodec/msgsmdec.c
+++ b/libavcodec/msgsmdec.c
@@ -22,6 +22,7 @@
#define BITSTREAM_READER_LE
#include "avcodec.h"
#include "msgsmdec.h"
+#include "gsm.h"
#include "gsmdec_template.c"
int ff_msgsm_decode_block(AVCodecContext *avctx, int16_t *samples,
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 1317ef0..888bdf8 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -21,7 +21,7 @@
#define AVCODEC_VERSION_H
#define LIBAVCODEC_VERSION_MAJOR 53
-#define LIBAVCODEC_VERSION_MINOR 32
+#define LIBAVCODEC_VERSION_MINOR 33
#define LIBAVCODEC_VERSION_MICRO 2
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
--
1.7.1
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