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Unified Diff: patched-ffmpeg-mt/libavcodec/vc1_asftorcv_bsf.c

Issue 789004: ffmpeg roll of source to mar 9 version... (Closed) Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/ffmpeg/
Patch Set: '' Created 10 years, 9 months ago
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Index: patched-ffmpeg-mt/libavcodec/vc1_asftorcv_bsf.c
===================================================================
--- patched-ffmpeg-mt/libavcodec/vc1_asftorcv_bsf.c (revision 41250)
+++ patched-ffmpeg-mt/libavcodec/vc1_asftorcv_bsf.c (working copy)
@@ -86,3 +86,91 @@
sizeof(ASFTORCVBSFContext),
asftorcv_filter,
};
+/*
+ * copyright (c) 2010 Google Inc.
+ *
+ * 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 "avcodec.h"
+#include "bytestream.h"
+
+#define RCV_STREAM_HEADER_SIZE 36
+#define RCV_PICTURE_HEADER_SIZE 8
+
+typedef struct ASFTORCVBSFContext {
+ int frames;
+} ASFTORCVBSFContext;
+
+static int asftorcv_filter(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size, int keyframe){
+ ASFTORCVBSFContext* ctx = (ASFTORCVBSFContext*)bsfc->priv_data;
+
+ if (avctx->codec_id != CODEC_ID_WMV3) {
+ av_log(avctx, AV_LOG_ERROR, "Only WMV3 is accepted!\n");
+ return -1;
+ }
+
+ uint8_t* bs = NULL;
+ if (!ctx->frames) {
+ // Write the header if this is the first frame.
+ *poutbuf = av_malloc(RCV_STREAM_HEADER_SIZE + RCV_PICTURE_HEADER_SIZE + buf_size);
+ *poutbuf_size = RCV_STREAM_HEADER_SIZE + RCV_PICTURE_HEADER_SIZE + buf_size;
+ bs = *poutbuf;
+
+ // The following structure of stream header comes from libavformat/vc1testenc.c.
+ bytestream_put_le24(&bs, 0); // Frame count. 0 for streaming.
+ bytestream_put_byte(&bs, 0xC5);
+ bytestream_put_le32(&bs, 4); // 4 bytes of extra data.
+ bytestream_put_byte(&bs, avctx->extradata[0]);
+ bytestream_put_byte(&bs, avctx->extradata[1]);
+ bytestream_put_byte(&bs, avctx->extradata[2]);
+ bytestream_put_byte(&bs, avctx->extradata[3]);
+ bytestream_put_le32(&bs, avctx->height);
+ bytestream_put_le32(&bs, avctx->width);
+ bytestream_put_le32(&bs, 0xC);
+ bytestream_put_le24(&bs, 0); // hrd_buffer
+ bytestream_put_byte(&bs, 0x80); // level|cbr|res1
+ bytestream_put_le32(&bs, 0); // hrd_rate
+
+ // The following LE32 describes the frame rate. Since we don't care so fill
+ // it with 0xFFFFFFFF which means variable framerate.
+ // See: libavformat/vc1testenc.c
+ bytestream_put_le32(&bs, 0xFFFFFFFF);
+ } else {
+ *poutbuf = av_malloc(RCV_PICTURE_HEADER_SIZE + buf_size);
+ *poutbuf_size = RCV_PICTURE_HEADER_SIZE + buf_size;
+ bs = *poutbuf;
+ }
+
+ // Write the picture header.
+ bytestream_put_le32(&bs, buf_size | (keyframe ? 0x80000000 : 0));
+
+ // The following LE32 describes the pts. Since we don't care so fill it with 0.
+ bytestream_put_le32(&bs, 0);
+ memcpy(bs, buf, buf_size);
+
+ ++ctx->frames;
+ return 0;
+}
+
+AVBitStreamFilter vc1_asftorcv_bsf = {
+ "vc1_asftorcv",
+ sizeof(ASFTORCVBSFContext),
+ asftorcv_filter,
+};

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