Initial commit of all previous Chrome build scripts.

chromium/patches/from_upstream/36_theora_flush.patch

+diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c
+index c3dff7f..d853df6 100644
+--- a/libavcodec/vp3.c
++++ b/libavcodec/vp3.c
+@@ -1906,7 +1906,7 @@ static int vp3_decode_frame(AVCodecContext *avctx,
+     } else {
+         if (!s->golden_frame.data[0]) {
+             av_log(s->avctx, AV_LOG_WARNING, "vp3: first frame not a keyframe\n");
+-
++            return -1;
+             s->golden_frame.reference = 3;
+             s->golden_frame.pict_type = AV_PICTURE_TYPE_I;
+             if (ff_thread_get_buffer(avctx, &s->golden_frame) < 0) {
+@@ -2321,6 +2321,26 @@ static av_cold int theora_decode_init(AVCodecContext *avctx)
+     return vp3_decode_init(avctx);
+ }
+ 
++static void vp3_decode_flush(AVCodecContext *avctx)
++{
++    Vp3DecodeContext *s = avctx->priv_data;
++
++    if (s->golden_frame.data[0]) {
++        if (s->golden_frame.data[0] == s->last_frame.data[0])
++            memset(&s->last_frame, 0, sizeof(AVFrame));
++        if (s->current_frame.data[0] == s->golden_frame.data[0])
++            memset(&s->current_frame, 0, sizeof(AVFrame));
++        ff_thread_release_buffer(avctx, &s->golden_frame);
++    }
++    if (s->last_frame.data[0]) {
++        if (s->current_frame.data[0] == s->last_frame.data[0])
++            memset(&s->current_frame, 0, sizeof(AVFrame));
++        ff_thread_release_buffer(avctx, &s->last_frame);
++    }
++    if (s->current_frame.data[0])
++        ff_thread_release_buffer(avctx, &s->current_frame);
++}
++
+ AVCodec ff_theora_decoder = {
+     "theora",
+     AVMEDIA_TYPE_VIDEO,
+@@ -2332,6 +2352,7 @@ AVCodec ff_theora_decoder = {
+     vp3_decode_frame,
+     CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_FRAME_THREADS,
+     NULL,
++    .flush = vp3_decode_flush,
+     .long_name = NULL_IF_CONFIG_SMALL("Theora"),
+     .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context)
+ };
+@@ -2348,6 +2369,7 @@ AVCodec ff_vp3_decoder = {
+     vp3_decode_frame,
+     CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_FRAME_THREADS,
+     NULL,
++    .flush = vp3_decode_flush,
+     .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
+     .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context)
+ };