Remove libvpx from FFmpeg in favour of ffvp8.

ffmpeg/source/avcodec-53.sigs

-# Copyright (c) 2010 The Chromium Authors. All rights reserved.
+# Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # Functions from avcodec used in chromium code.
 
 AVCodecContext *avcodec_alloc_context(void);
 AVCodec *avcodec_find_decoder(enum CodecID id);
 AVFrame *avcodec_alloc_frame(void);
 int av_get_bits_per_sample_fmt(enum SampleFormat sample_fmt);
 int av_new_packet(AVPacket *pkt, int size);
@@ skipping 11 matching lines @@
 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int keyframe);
 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
 void av_destruct_packet(AVPacket *pkt);
 int av_lockmgr_register(AVLockMgrOperation cb);
 
 # RDFT functions.
 RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans);
 void av_rdft_calc(RDFTContext *s, FFTSample *data);
 void av_rdft_end(RDFTContext *s);
-
-# Export symbols for libvpx since Chromium is also using libvpx directly.
-vpx_codec_err_t vpx_codec_enc_config_default(vpx_codec_iface_t *iface, vpx_codec_enc_cfg_t *cfg, unsigned int usage);
-vpx_codec_err_t vpx_codec_enc_init_ver(vpx_codec_ctx_t *ctx, vpx_codec_iface_t *iface, vpx_codec_enc_cfg_t *cfg, vpx_codec_flags_t flags, int ver);
-vpx_codec_err_t vpx_codec_encode(vpx_codec_ctx_t *ctx, const vpx_image_t *img, vpx_codec_pts_t pts, unsigned long duration, vpx_enc_frame_flags_t flags, unsigned long deadline);
-const char *vpx_codec_error_detail(vpx_codec_ctx_t *ctx);
-const char *vpx_codec_error(vpx_codec_ctx_t *ctx);
-const char *vpx_codec_err_to_string(vpx_codec_err_t err);
-const vpx_codec_cx_pkt_t *vpx_codec_get_cx_data(vpx_codec_ctx_t *ctx, vpx_codec_iter_t *iter);
-vpx_codec_err_t vpx_codec_destroy(vpx_codec_ctx_t *ctx);
-vpx_codec_err_t vpx_codec_control_(vpx_codec_ctx_t *ctx, int ctrl_id, ...);
-vpx_codec_err_t vpx_codec_dec_init_ver(vpx_codec_ctx_t *ctx, vpx_codec_iface_t *iface, vpx_codec_dec_cfg_t *cfg, vpx_codec_flags_t flags, int ver);
-vpx_codec_err_t vpx_codec_decode(vpx_codec_ctx_t *ctx, const uint8_t *data, unsigned int data_sz, void *user_priv, long deadline);
-vpx_image_t *vpx_codec_get_frame(vpx_codec_ctx_t *ctx, vpx_codec_iter_t *iter);
-vpx_codec_iface_t* vpx_codec_vp8_cx(void);
-vpx_codec_iface_t* vpx_codec_vp8_dx(void);
-vpx_image_t *vpx_img_alloc(vpx_image_t *img, vpx_img_fmt_t fmt, unsigned int d_w,unsigned int d_h, unsigned int align);
-void vpx_img_free(vpx_image_t *img);
-vpx_codec_err_t vpx_codec_enc_config_set(vpx_codec_ctx_t *ctx, const vpx_codec_enc_cfg_t *cfg);