[FFmpeg-cvslog] libavformat: add support for G726 audio decoder in RTP and RTSP streams

[Miroslav Slugeň]

ffmpeg | branch: release/0.7 | Miroslav Slugeň <Thunder.m at seznam.cz> | Mon Nov  7 12:13:55 2011 +0100| [fd30240e98eb7e4ebdae26c17f9e7e49c99de709] | committer: Carl Eugen Hoyos

libavformat: add support for G726 audio decoder in RTP and RTSP streams
Fixes Ticket611

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit df9c1cfb48c2d8ddb3c11b4d1e8c4c33c6b0d8a2)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fd30240e98eb7e4ebdae26c17f9e7e49c99de709
---

 libavformat/Makefile         |    1 +
 libavformat/rtpdec.c         |    5 ++
 libavformat/rtpdec_formats.h |    4 ++
 libavformat/rtpdec_g726.c    |   94 ++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 104 insertions(+), 0 deletions(-)

diff --git a/libavformat/Makefile b/libavformat/Makefile
index e5ec44b..b84bb58 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -247,6 +247,7 @@ OBJS-$(CONFIG_RTPDEC)                    += rdt.o         \
                                             rtpdec.o      \
                                             rtpdec_amr.o  \
                                             rtpdec_asf.o  \
+                                            rtpdec_g726.o \
                                             rtpdec_h263.o \
                                             rtpdec_h264.o \
                                             rtpdec_latm.o \
diff --git a/libavformat/rtpdec.c b/libavformat/rtpdec.c
index 130a78d..db96a46 100644
--- a/libavformat/rtpdec.c
+++ b/libavformat/rtpdec.c
@@ -82,6 +82,11 @@ void av_register_rtp_dynamic_payload_handlers(void)
     ff_register_dynamic_payload_handler(&ff_qt_rtp_vid_handler);
     ff_register_dynamic_payload_handler(&ff_quicktime_rtp_aud_handler);
     ff_register_dynamic_payload_handler(&ff_quicktime_rtp_vid_handler);
+
+    ff_register_dynamic_payload_handler(&ff_g726_16_dynamic_handler);
+    ff_register_dynamic_payload_handler(&ff_g726_24_dynamic_handler);
+    ff_register_dynamic_payload_handler(&ff_g726_32_dynamic_handler);
+    ff_register_dynamic_payload_handler(&ff_g726_40_dynamic_handler);
 }
 
 RTPDynamicProtocolHandler *ff_rtp_handler_find_by_name(const char *name,
diff --git a/libavformat/rtpdec_formats.h b/libavformat/rtpdec_formats.h
index 16f5a9d..afd047b 100644
--- a/libavformat/rtpdec_formats.h
+++ b/libavformat/rtpdec_formats.h
@@ -33,6 +33,10 @@ int ff_wms_parse_sdp_a_line(AVFormatContext *s, const char *p);
 
 extern RTPDynamicProtocolHandler ff_amr_nb_dynamic_handler;
 extern RTPDynamicProtocolHandler ff_amr_wb_dynamic_handler;
+extern RTPDynamicProtocolHandler ff_g726_16_dynamic_handler;
+extern RTPDynamicProtocolHandler ff_g726_24_dynamic_handler;
+extern RTPDynamicProtocolHandler ff_g726_32_dynamic_handler;
+extern RTPDynamicProtocolHandler ff_g726_40_dynamic_handler;
 extern RTPDynamicProtocolHandler ff_h263_1998_dynamic_handler;
 extern RTPDynamicProtocolHandler ff_h263_2000_dynamic_handler;
 extern RTPDynamicProtocolHandler ff_h264_dynamic_handler;
diff --git a/libavformat/rtpdec_g726.c b/libavformat/rtpdec_g726.c
new file mode 100644
index 0000000..cde832b
--- /dev/null
+++ b/libavformat/rtpdec_g726.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2011 Miroslav Slugeň <Thunder.m at seznam.cz>
+ *
+ * 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 "avformat.h"
+#include "rtpdec_formats.h"
+
+static int g726_16_parse_sdp_line(AVFormatContext *s, int st_index,
+                              PayloadContext *data, const char *line)
+{
+    AVStream *stream = s->streams[st_index];
+    AVCodecContext *codec = stream->codec;
+
+    codec->bit_rate = 16000;
+
+    return 0;
+}
+
+static int g726_24_parse_sdp_line(AVFormatContext *s, int st_index,
+                              PayloadContext *data, const char *line)
+{
+    AVStream *stream = s->streams[st_index];
+    AVCodecContext *codec = stream->codec;
+
+    codec->bit_rate = 24000;
+
+    return 0;
+}
+
+static int g726_32_parse_sdp_line(AVFormatContext *s, int st_index,
+                              PayloadContext *data, const char *line)
+{
+    AVStream *stream = s->streams[st_index];
+    AVCodecContext *codec = stream->codec;
+
+    codec->bit_rate = 32000;
+
+    return 0;
+}
+
+static int g726_40_parse_sdp_line(AVFormatContext *s, int st_index,
+                              PayloadContext *data, const char *line)
+{
+    AVStream *stream = s->streams[st_index];
+    AVCodecContext *codec = stream->codec;
+
+    codec->bit_rate = 40000;
+
+    return 0;
+}
+
+RTPDynamicProtocolHandler ff_g726_16_dynamic_handler = {
+    .enc_name         = "G726-16",
+    .codec_type       = AVMEDIA_TYPE_AUDIO,
+    .codec_id         = CODEC_ID_ADPCM_G726,
+    .parse_sdp_a_line = g726_16_parse_sdp_line,
+};
+
+RTPDynamicProtocolHandler ff_g726_24_dynamic_handler = {
+    .enc_name         = "G726-24",
+    .codec_type       = AVMEDIA_TYPE_AUDIO,
+    .codec_id         = CODEC_ID_ADPCM_G726,
+    .parse_sdp_a_line = g726_24_parse_sdp_line,
+};
+
+RTPDynamicProtocolHandler ff_g726_32_dynamic_handler = {
+    .enc_name         = "G726-32",
+    .codec_type       = AVMEDIA_TYPE_AUDIO,
+    .codec_id         = CODEC_ID_ADPCM_G726,
+    .parse_sdp_a_line = g726_32_parse_sdp_line,
+};
+
+RTPDynamicProtocolHandler ff_g726_40_dynamic_handler = {
+    .enc_name         = "G726-40",
+    .codec_type       = AVMEDIA_TYPE_AUDIO,
+    .codec_id         = CODEC_ID_ADPCM_G726,
+    .parse_sdp_a_line = g726_40_parse_sdp_line,
+};