ffmpeg-2.1.1: move directory

git-svn-id: svn://kolibrios.org@6148 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavformat/rtpdec_svq3.c

@@ -0,0 +1,133 @@
+/*
+ * Sorenson-3 (SVQ3/SV3V) payload for RTP
+ * Copyright (c) 2010 Ronald S. Bultje
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * @brief RTP support for the SV3V (SVQ3) payload
+ * @author Ronald S. Bultje <rbultje@ronald.bitfreak.net>
+ * @see http://wiki.multimedia.cx/index.php?title=Sorenson_Video_3#Packetization
+ */
+
+#include <string.h>
+#include "libavutil/intreadwrite.h"
+#include "internal.h"
+#include "rtp.h"
+#include "rtpdec.h"
+#include "rtpdec_formats.h"
+
+struct PayloadContext {
+    AVIOContext *pktbuf;
+    int64_t        timestamp;
+};
+
+/** return 0 on packet, <0 on partial packet or error... */
+static int svq3_parse_packet (AVFormatContext *s, PayloadContext *sv,
+                              AVStream *st, AVPacket *pkt,
+                              uint32_t *timestamp,
+                              const uint8_t *buf, int len, uint16_t seq,
+                              int flags)
+{
+    int config_packet, start_packet, end_packet;
+
+    if (len < 2)
+        return AVERROR_INVALIDDATA;
+
+    config_packet = buf[0] & 0x40;
+    start_packet  = buf[0] & 0x20;
+    end_packet    = buf[0] & 0x10;
+    buf += 2;     // ignore buf[1]
+    len -= 2;
+
+    if (config_packet) {
+
+        av_freep(&st->codec->extradata);
+        st->codec->extradata_size = 0;
+
+        if (len < 2 || ff_alloc_extradata(st->codec, len + 8))
+            return AVERROR_INVALIDDATA;
+
+        memcpy(st->codec->extradata, "SEQH", 4);
+        AV_WB32(st->codec->extradata + 4, len);
+        memcpy(st->codec->extradata + 8, buf, len);
+
+        /* We set codec_id to AV_CODEC_ID_NONE initially to
+         * delay decoder initialization since extradata is
+         * carried within the RTP stream, not SDP. Here,
+         * by setting codec_id to AV_CODEC_ID_SVQ3, we are signalling
+         * to the decoder that it is OK to initialize. */
+        st->codec->codec_id = AV_CODEC_ID_SVQ3;
+
+        return AVERROR(EAGAIN);
+    }
+
+    if (start_packet) {
+        int res;
+
+        if (sv->pktbuf) {
+            uint8_t *tmp;
+            avio_close_dyn_buf(sv->pktbuf, &tmp);
+            av_free(tmp);
+        }
+        if ((res = avio_open_dyn_buf(&sv->pktbuf)) < 0)
+            return res;
+        sv->timestamp   = *timestamp;
+    }
+
+    if (!sv->pktbuf)
+        return AVERROR_INVALIDDATA;
+
+    avio_write(sv->pktbuf, buf, len);
+
+    if (end_packet) {
+        int ret = ff_rtp_finalize_packet(pkt, &sv->pktbuf, st->index);
+        if (ret < 0)
+            return ret;
+
+        *timestamp        = sv->timestamp;
+        return 0;
+    }
+
+    return AVERROR(EAGAIN);
+}
+
+static PayloadContext *svq3_extradata_new(void)
+{
+    return av_mallocz(sizeof(PayloadContext));
+}
+
+static void svq3_extradata_free(PayloadContext *sv)
+{
+    if (sv->pktbuf) {
+        uint8_t *buf;
+        avio_close_dyn_buf(sv->pktbuf, &buf);
+        av_free(buf);
+    }
+    av_free(sv);
+}
+
+RTPDynamicProtocolHandler ff_svq3_dynamic_handler = {
+    .enc_name         = "X-SV3V-ES",
+    .codec_type       = AVMEDIA_TYPE_VIDEO,
+    .codec_id         = AV_CODEC_ID_NONE,      // see if (config_packet) above
+    .alloc            = svq3_extradata_new,
+    .free             = svq3_extradata_free,
+    .parse_packet     = svq3_parse_packet,
+};