G.723.1 demuxer and decoder

Signed-off-by: Kostya Shishkov <kostya.shishkov@gmail.com>

Changelog

@@ -38,6 +38,7 @@ version <next>:
 - RTMPS protocol support
 - RTMPTS protocol support
 - JPEG 2000 encoding support through OpenJPEG
+- G.723.1 demuxer and decoder
 
 
 version 0.8:

doc/general.texi

@@ -730,6 +730,7 @@ following image formats are supported:
 @item DV audio               @tab     @tab  X
 @item Enhanced AC-3          @tab  X  @tab  X
 @item FLAC (Free Lossless Audio Codec)  @tab  X  @tab  IX
+@item G.723.1                @tab     @tab  X
 @item GSM                    @tab  E  @tab  X
     @tab encoding supported through external library libgsm
 @item GSM Microsoft variant  @tab  E  @tab  X

libavcodec/Makefile

@@ -168,6 +168,8 @@ OBJS-$(CONFIG_FLIC_DECODER)            += flicvideo.o
 OBJS-$(CONFIG_FOURXM_DECODER)          += 4xm.o
 OBJS-$(CONFIG_FRAPS_DECODER)           += fraps.o
 OBJS-$(CONFIG_FRWU_DECODER)            += frwu.o
+OBJS-$(CONFIG_G723_1_DECODER)          += g723_1.o acelp_vectors.o \
+                                          celp_filters.o celp_math.o
 OBJS-$(CONFIG_GIF_DECODER)             += gifdec.o lzw.o
 OBJS-$(CONFIG_GIF_ENCODER)             += gif.o lzwenc.o
 OBJS-$(CONFIG_GSM_DECODER)             += gsmdec.o gsmdec_data.o msgsmdec.o

libavcodec/allcodecs.c

@@ -262,6 +262,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER (DSICINAUDIO, dsicinaudio);
     REGISTER_ENCDEC  (EAC3, eac3);
     REGISTER_ENCDEC  (FLAC, flac);
+    REGISTER_DECODER (G723_1, g723_1);
     REGISTER_DECODER (GSM, gsm);
     REGISTER_DECODER (GSM_MS, gsm_ms);
     REGISTER_DECODER (IAC, iac);

libavformat/Makefile

@@ -101,6 +101,7 @@ OBJS-$(CONFIG_GXF_DEMUXER)               += gxf.o
 OBJS-$(CONFIG_GXF_MUXER)                 += gxfenc.o audiointerleave.o
 OBJS-$(CONFIG_G722_DEMUXER)              += rawdec.o
 OBJS-$(CONFIG_G722_MUXER)                += rawenc.o
+OBJS-$(CONFIG_G723_1_DEMUXER)            += g723_1.o
 OBJS-$(CONFIG_H261_DEMUXER)              += h261dec.o rawdec.o
 OBJS-$(CONFIG_H261_MUXER)                += rawenc.o
 OBJS-$(CONFIG_H263_DEMUXER)              += h263dec.o rawdec.o

libavformat/allformats.c

@@ -99,6 +99,7 @@ void av_register_all(void)
     REGISTER_MUXER    (FRAMECRC, framecrc);
     REGISTER_MUXER    (FRAMEMD5, framemd5);
     REGISTER_MUXDEMUX (G722, g722);
+    REGISTER_DEMUXER  (G723_1, g723_1);
     REGISTER_MUXER    (GIF, gif);
     REGISTER_DEMUXER  (GSM, gsm);
     REGISTER_MUXDEMUX (GXF, gxf);

libavformat/g723_1.c

+/*
+ * G.723.1 demuxer
+ * Copyright (c) 2010 Mohamed Naufal Basheer
+ *
+ * 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
+ * G.723.1 demuxer
+ */
+
+#include "libavutil/audioconvert.h"
+#include "avformat.h"
+#include "internal.h"
+
+static const uint8_t frame_size[4] = { 24, 20, 4, 1 };
+
+static int g723_1_init(AVFormatContext *s)
+{
+    AVStream *st;
+
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    st->codec->codec_type     = AVMEDIA_TYPE_AUDIO;
+    st->codec->codec_id       = CODEC_ID_G723_1;
+    st->codec->channel_layout = AV_CH_LAYOUT_MONO;
+    st->codec->channels       = 1;
+    st->codec->sample_rate    = 8000;
+
+    avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
+    st->start_time = 0;
+
+    return 0;
+}
+
+static int g723_1_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    int size, byte, ret;
+
+    pkt->pos = avio_tell(s->pb);
+    byte     = avio_r8(s->pb);
+    size     = frame_size[byte & 3];
+
+    ret = av_new_packet(pkt, size);
+    if (ret < 0)
+        return ret;
+
+    pkt->data[0]      = byte;
+    pkt->duration     = 240;
+    pkt->stream_index = 0;
+
+    ret = avio_read(s->pb, pkt->data + 1, size - 1);
+    if (ret < size - 1) {
+        av_free_packet(pkt);
+        return ret < 0 ? ret : AVERROR_EOF;
+    }
+
+    return pkt->size;
+}
+
+AVInputFormat ff_g723_1_demuxer = {
+    .name        = "g723_1",
+    .long_name   = NULL_IF_CONFIG_SMALL("G.723.1 format"),
+    .read_header = g723_1_init,
+    .read_packet = g723_1_read_packet,
+    .extensions  = "tco",
+    .flags       = AVFMT_GENERIC_INDEX
+};

libavformat/rtp.c

@@ -44,7 +44,7 @@ static const struct
 {
   {0, "PCMU",        AVMEDIA_TYPE_AUDIO,   CODEC_ID_PCM_MULAW, 8000, 1},
   {3, "GSM",         AVMEDIA_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},
-  {4, "G723",        AVMEDIA_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},
+  {4, "G723",        AVMEDIA_TYPE_AUDIO,   CODEC_ID_G723_1, 8000, 1},
   {5, "DVI4",        AVMEDIA_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},
   {6, "DVI4",        AVMEDIA_TYPE_AUDIO,   CODEC_ID_NONE, 16000, 1},
   {7, "LPC",         AVMEDIA_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},