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authorDiego Biurrun <diego@biurrun.de>2012-10-14 23:41:12 +0200
committerDiego Biurrun <diego@biurrun.de>2012-10-15 13:34:07 +0200
commit7e68c91e247ba20fc8a08cf5a6cf2b75984f1aeb (patch)
tree7e5b3009d1916023e0a9cd2f38554e356398e79a
parent95cd815c3663603871a1f2da95846e8f72d4ea96 (diff)
downloadffmpeg-7e68c91e247ba20fc8a08cf5a6cf2b75984f1aeb.tar.gz
rmdec: Move SIPR code shared with Matroska demuxer to a separate file
-rw-r--r--libavformat/Makefile6
-rw-r--r--libavformat/matroskadec.c2
-rw-r--r--libavformat/rm.h8
-rw-r--r--libavformat/rmdec.c42
-rw-r--r--libavformat/rmsipr.c61
-rw-r--r--libavformat/rmsipr.h35
6 files changed, 101 insertions, 53 deletions
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 5d89a2e3da..26c9803add 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -135,8 +135,8 @@ OBJS-$(CONFIG_LMLM4_DEMUXER) += lmlm4.o
OBJS-$(CONFIG_LXF_DEMUXER) += lxfdec.o
OBJS-$(CONFIG_M4V_DEMUXER) += m4vdec.o rawdec.o
OBJS-$(CONFIG_M4V_MUXER) += rawenc.o
-OBJS-$(CONFIG_MATROSKA_DEMUXER) += matroskadec.o matroska.o \
- isom.o rmdec.o rm.o
+OBJS-$(CONFIG_MATROSKA_DEMUXER) += matroskadec.o matroska.o \
+ isom.o rmsipr.o
OBJS-$(CONFIG_MATROSKA_MUXER) += matroskaenc.o matroska.o \
isom.o avc.o \
flacenc_header.o avlanguage.o
@@ -242,7 +242,7 @@ OBJS-$(CONFIG_R3D_DEMUXER) += r3d.o
OBJS-$(CONFIG_RAWVIDEO_DEMUXER) += rawvideodec.o rawdec.o
OBJS-$(CONFIG_RAWVIDEO_MUXER) += rawenc.o
OBJS-$(CONFIG_RL2_DEMUXER) += rl2.o
-OBJS-$(CONFIG_RM_DEMUXER) += rmdec.o rm.o
+OBJS-$(CONFIG_RM_DEMUXER) += rmdec.o rm.o rmsipr.o
OBJS-$(CONFIG_RM_MUXER) += rmenc.o rm.o
OBJS-$(CONFIG_ROQ_DEMUXER) += idroqdec.o
OBJS-$(CONFIG_ROQ_MUXER) += idroqenc.o rawenc.o
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 094b0558f7..68c936c15a 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -35,7 +35,7 @@
/* For ff_codec_get_id(). */
#include "riff.h"
#include "isom.h"
-#include "rm.h"
+#include "rmsipr.h"
#include "matroska.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/mpeg4audio.h"
diff --git a/libavformat/rm.h b/libavformat/rm.h
index 9d104ad74c..a06ea01a5a 100644
--- a/libavformat/rm.h
+++ b/libavformat/rm.h
@@ -26,7 +26,6 @@
#include "internal.h"
extern const char * const ff_rm_metadata[4];
-extern const unsigned char ff_sipr_subpk_size[4];
extern const AVCodecTag ff_rm_codec_tags[];
typedef struct RMStream RMStream;
@@ -93,11 +92,4 @@ int ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
int ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
AVStream *st, RMStream *rst, AVPacket *pkt);
-/**
- * Perform 4-bit block reordering for SIPR data.
- *
- * @param buf SIPR data
- */
-void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize);
-
#endif /* AVFORMAT_RM_H */
diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c
index eefd2c5082..07d218e311 100644
--- a/libavformat/rmdec.c
+++ b/libavformat/rmdec.c
@@ -25,6 +25,7 @@
#include "avformat.h"
#include "internal.h"
#include "riff.h"
+#include "rmsipr.h"
#include "rm.h"
#define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/Atrac
@@ -59,21 +60,6 @@ typedef struct {
int audio_pkt_cnt; ///< Output packet counter
} RMDemuxContext;
-static const unsigned char sipr_swaps[38][2] = {
- { 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 },
- { 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 },
- { 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 },
- { 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 },
- { 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 },
- { 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 },
- { 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 },
- { 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 },
- { 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 },
- { 67, 83 }, { 77, 80 }
-};
-
-const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 };
-
static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
{
int i;
@@ -719,32 +705,6 @@ rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
}
}
-/**
- * Perform 4-bit block reordering for SIPR data.
- * @todo This can be optimized, e.g. use memcpy() if data blocks are aligned
- */
-void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
-{
- int n, bs = sub_packet_h * framesize * 2 / 96; // nibbles per subpacket
-
- for (n = 0; n < 38; n++) {
- int j;
- int i = bs * sipr_swaps[n][0];
- int o = bs * sipr_swaps[n][1];
-
- /* swap 4bit-nibbles of block 'i' with 'o' */
- for (j = 0; j < bs; j++, i++, o++) {
- int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF,
- y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF;
-
- buf[o >> 1] = (x << (4 * (o & 1))) |
- (buf[o >> 1] & (0xF << (4 * !(o & 1))));
- buf[i >> 1] = (y << (4 * (i & 1))) |
- (buf[i >> 1] & (0xF << (4 * !(i & 1))));
- }
- }
-}
-
int
ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
AVStream *st, RMStream *ast, int len, AVPacket *pkt,
diff --git a/libavformat/rmsipr.c b/libavformat/rmsipr.c
new file mode 100644
index 0000000000..89fbd0e398
--- /dev/null
+++ b/libavformat/rmsipr.c
@@ -0,0 +1,61 @@
+/*
+ * tables and functions for demuxing SIPR audio muxed RealMedia style
+ *
+ * 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
+ */
+
+#include <stdint.h>
+
+#include "rmsipr.h"
+
+const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 };
+
+static const unsigned char sipr_swaps[38][2] = {
+ { 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 },
+ { 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 },
+ { 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 },
+ { 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 },
+ { 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 },
+ { 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 },
+ { 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 },
+ { 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 },
+ { 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 },
+ { 67, 83 }, { 77, 80 }
+};
+
+/* This can be optimized, e.g. use memcpy() if data blocks are aligned. */
+void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
+{
+ int n, bs = sub_packet_h * framesize * 2 / 96; // nibbles per subpacket
+
+ for (n = 0; n < 38; n++) {
+ int j;
+ int i = bs * sipr_swaps[n][0];
+ int o = bs * sipr_swaps[n][1];
+
+ /* swap 4bit-nibbles of block 'i' with 'o' */
+ for (j = 0; j < bs; j++, i++, o++) {
+ int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF,
+ y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF;
+
+ buf[o >> 1] = (x << (4 * (o & 1))) |
+ (buf[o >> 1] & (0xF << (4 * !(o & 1))));
+ buf[i >> 1] = (y << (4 * (i & 1))) |
+ (buf[i >> 1] & (0xF << (4 * !(i & 1))));
+ }
+ }
+}
diff --git a/libavformat/rmsipr.h b/libavformat/rmsipr.h
new file mode 100644
index 0000000000..c8d3d0a236
--- /dev/null
+++ b/libavformat/rmsipr.h
@@ -0,0 +1,35 @@
+/*
+ * tables and functions for demuxing SIPR audio muxed RealMedia style
+ *
+ * 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 AVFORMAT_RMSIPR_H
+#define AVFORMAT_RMSIPR_H
+
+#include <stdint.h>
+
+extern const unsigned char ff_sipr_subpk_size[4];
+
+/**
+ * Perform 4-bit block reordering for SIPR data.
+ *
+ * @param buf SIPR data
+ */
+void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize);
+
+#endif /* AVFORMAT_RMSIPR_H */