making act segmenter

1 files changed, 151 insertions, 0 deletions

diff --git a/ffmpeg/libavformat/rtp.c b/ffmpeg/libavformat/rtp.c
new file mode 100644
index 0000000..c4dcf6a
--- /dev/null
+++ b/ffmpeg/libavformat/rtp.c
@@ -0,0 +1,151 @@
+/*
+ * RTP input/output format
+ * Copyright (c) 2002 Fabrice Bellard
+ *
+ * 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 "libavutil/opt.h"
+#include "avformat.h"
+
+#include "rtp.h"
+
+/* from http://www.iana.org/assignments/rtp-parameters last updated 05 January 2005 */
+/* payload types >= 96 are dynamic;
+ * payload types between 72 and 76 are reserved for RTCP conflict avoidance;
+ * all the other payload types not present in the table are unassigned or
+ * reserved
+ */
+static const struct {
+    int pt;
+    const char enc_name[6];
+    enum AVMediaType codec_type;
+    enum AVCodecID codec_id;
+    int clock_rate;
+    int audio_channels;
+} rtp_payload_types[] = {
+  {0, "PCMU",        AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_PCM_MULAW, 8000, 1},
+  {3, "GSM",         AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_NONE, 8000, 1},
+  {4, "G723",        AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_G723_1, 8000, 1},
+  {5, "DVI4",        AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_NONE, 8000, 1},
+  {6, "DVI4",        AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_NONE, 16000, 1},
+  {7, "LPC",         AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_NONE, 8000, 1},
+  {8, "PCMA",        AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_PCM_ALAW, 8000, 1},
+  {9, "G722",        AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_ADPCM_G722, 8000, 1},
+  {10, "L16",        AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_PCM_S16BE, 44100, 2},
+  {11, "L16",        AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_PCM_S16BE, 44100, 1},
+  {12, "QCELP",      AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_QCELP, 8000, 1},
+  {13, "CN",         AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_NONE, 8000, 1},
+  {14, "MPA",        AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_MP2, -1, -1},
+  {14, "MPA",        AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_MP3, -1, -1},
+  {15, "G728",       AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_NONE, 8000, 1},
+  {16, "DVI4",       AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_NONE, 11025, 1},
+  {17, "DVI4",       AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_NONE, 22050, 1},
+  {18, "G729",       AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_NONE, 8000, 1},
+  {25, "CelB",       AVMEDIA_TYPE_VIDEO,   AV_CODEC_ID_NONE, 90000, -1},
+  {26, "JPEG",       AVMEDIA_TYPE_VIDEO,   AV_CODEC_ID_MJPEG, 90000, -1},
+  {28, "nv",         AVMEDIA_TYPE_VIDEO,   AV_CODEC_ID_NONE, 90000, -1},
+  {31, "H261",       AVMEDIA_TYPE_VIDEO,   AV_CODEC_ID_H261, 90000, -1},
+  {32, "MPV",        AVMEDIA_TYPE_VIDEO,   AV_CODEC_ID_MPEG1VIDEO, 90000, -1},
+  {32, "MPV",        AVMEDIA_TYPE_VIDEO,   AV_CODEC_ID_MPEG2VIDEO, 90000, -1},
+  {33, "MP2T",       AVMEDIA_TYPE_DATA,    AV_CODEC_ID_MPEG2TS, 90000, -1},
+  {34, "H263",       AVMEDIA_TYPE_VIDEO,   AV_CODEC_ID_H263, 90000, -1},
+  {-1, "",           AVMEDIA_TYPE_UNKNOWN, AV_CODEC_ID_NONE, -1, -1}
+};
+
+int ff_rtp_get_codec_info(AVCodecContext *codec, int payload_type)
+{
+    int i = 0;
+
+    for (i = 0; rtp_payload_types[i].pt >= 0; i++)
+        if (rtp_payload_types[i].pt == payload_type) {
+            if (rtp_payload_types[i].codec_id != AV_CODEC_ID_NONE) {
+                codec->codec_type = rtp_payload_types[i].codec_type;
+                codec->codec_id = rtp_payload_types[i].codec_id;
+                if (rtp_payload_types[i].audio_channels > 0)
+                    codec->channels = rtp_payload_types[i].audio_channels;
+                if (rtp_payload_types[i].clock_rate > 0)
+                    codec->sample_rate = rtp_payload_types[i].clock_rate;
+                return 0;
+            }
+        }
+    return -1;
+}
+
+int ff_rtp_get_payload_type(AVFormatContext *fmt,
+                            AVCodecContext *codec, int idx)
+{
+    int i;
+    AVOutputFormat *ofmt = fmt ? fmt->oformat : NULL;
+
+    /* Was the payload type already specified for the RTP muxer? */
+    if (ofmt && ofmt->priv_class && fmt->priv_data) {
+        int64_t payload_type;
+        if (av_opt_get_int(fmt->priv_data, "payload_type", 0, &payload_type) >= 0 &&
+            payload_type >= 0)
+            return (int)payload_type;
+    }
+
+    /* static payload type */
+    for (i = 0; rtp_payload_types[i].pt >= 0; ++i)
+        if (rtp_payload_types[i].codec_id == codec->codec_id) {
+            if (codec->codec_id == AV_CODEC_ID_H263 && (!fmt || !fmt->oformat ||
+                !fmt->oformat->priv_class || !fmt->priv_data ||
+                !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190")))
+                continue;
+            /* G722 has 8000 as nominal rate even if the sample rate is 16000,
+             * see section 4.5.2 in RFC 3551. */
+            if (codec->codec_id == AV_CODEC_ID_ADPCM_G722 &&
+                codec->sample_rate == 16000 && codec->channels == 1)
+                return rtp_payload_types[i].pt;
+            if (codec->codec_type == AVMEDIA_TYPE_AUDIO &&
+                ((rtp_payload_types[i].clock_rate > 0 &&
+                  codec->sample_rate != rtp_payload_types[i].clock_rate) ||
+                 (rtp_payload_types[i].audio_channels > 0 &&
+                  codec->channels != rtp_payload_types[i].audio_channels)))
+                continue;
+            return rtp_payload_types[i].pt;
+        }
+
+    if (idx < 0)
+        idx = codec->codec_type == AVMEDIA_TYPE_AUDIO;
+
+    /* dynamic payload type */
+    return RTP_PT_PRIVATE + idx;
+}
+
+const char *ff_rtp_enc_name(int payload_type)
+{
+    int i;
+
+    for (i = 0; rtp_payload_types[i].pt >= 0; i++)
+        if (rtp_payload_types[i].pt == payload_type)
+            return rtp_payload_types[i].enc_name;
+
+    return "";
+}
+
+enum AVCodecID ff_rtp_codec_id(const char *buf, enum AVMediaType codec_type)
+{
+    int i;
+
+    for (i = 0; rtp_payload_types[i].pt >= 0; i++)
+        if (!strcmp(buf, rtp_payload_types[i].enc_name) && (codec_type == rtp_payload_types[i].codec_type))
+            return rtp_payload_types[i].codec_id;
+
+    return AV_CODEC_ID_NONE;
+}