ffmpeg-2.8.5

git-svn-id: svn://kolibrios.org@6147 a494cfbc-eb01-0410-851d-a64ba20cac60
2016-02-05 22:08:02 +00:00
parent a08f61ddb9
commit a4b787f4b8
5429 changed files with 1356786 additions and 0 deletions
--- a/contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavformat/ivfenc.c
+++ b/contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavformat/ivfenc.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2010 Reimar Döffinger
+ *
+ * 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 "libavutil/intreadwrite.h"
+
+typedef struct IVFEncContext {
+    unsigned frame_cnt;
+    uint64_t last_pts, sum_delta_pts;
+} IVFEncContext;
+
+static int ivf_write_header(AVFormatContext *s)
+{
+    AVCodecContext *ctx;
+    AVIOContext *pb = s->pb;
+
+    if (s->nb_streams != 1) {
+        av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n");
+        return AVERROR(EINVAL);
+    }
+    ctx = s->streams[0]->codec;
+    if (ctx->codec_type != AVMEDIA_TYPE_VIDEO ||
+        !(ctx->codec_id == AV_CODEC_ID_VP8 || ctx->codec_id == AV_CODEC_ID_VP9)) {
+        av_log(s, AV_LOG_ERROR, "Currently only VP8 and VP9 are supported!\n");
+        return AVERROR(EINVAL);
+    }
+    avio_write(pb, "DKIF", 4);
+    avio_wl16(pb, 0); // version
+    avio_wl16(pb, 32); // header length
+    avio_wl32(pb, ctx->codec_tag ? ctx->codec_tag : ctx->codec_id == AV_CODEC_ID_VP9 ? AV_RL32("VP90") : AV_RL32("VP80"));
+    avio_wl16(pb, ctx->width);
+    avio_wl16(pb, ctx->height);
+    avio_wl32(pb, s->streams[0]->time_base.den);
+    avio_wl32(pb, s->streams[0]->time_base.num);
+    avio_wl64(pb, 0xFFFFFFFFFFFFFFFFULL);
+
+    return 0;
+}
+
+static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    AVIOContext *pb = s->pb;
+    IVFEncContext *ctx = s->priv_data;
+
+    avio_wl32(pb, pkt->size);
+    avio_wl64(pb, pkt->pts);
+    avio_write(pb, pkt->data, pkt->size);
+    if (ctx->frame_cnt)
+        ctx->sum_delta_pts += pkt->pts - ctx->last_pts;
+    ctx->frame_cnt++;
+    ctx->last_pts = pkt->pts;
+
+    return 0;
+}
+
+static int ivf_write_trailer(AVFormatContext *s)
+{
+    AVIOContext *pb = s->pb;
+    IVFEncContext *ctx = s->priv_data;
+
+    if (pb->seekable && ctx->frame_cnt > 1) {
+        size_t end = avio_tell(pb);
+
+        avio_seek(pb, 24, SEEK_SET);
+        avio_wl64(pb, ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt - 1));
+        avio_seek(pb, end, SEEK_SET);
+    }
+
+    return 0;
+}
+
+AVOutputFormat ff_ivf_muxer = {
+    .priv_data_size = sizeof(IVFEncContext),
+    .name         = "ivf",
+    .long_name    = NULL_IF_CONFIG_SMALL("On2 IVF"),
+    .extensions   = "ivf",
+    .audio_codec  = AV_CODEC_ID_NONE,
+    .video_codec  = AV_CODEC_ID_VP8,
+    .write_header = ivf_write_header,
+    .write_packet = ivf_write_packet,
+    .write_trailer = ivf_write_trailer,
+};