VP8 decoding via libvpx

Patch by James Zern for Google, Inc., jzern google com

backportd r23191,23303,23307-23308 by conrad, cehoyos and mstorsjo

Originally committed as revision 23374 to svn://svn.ffmpeg.org/ffmpeg/branches/0.6

Changelog

@@ -1,7 +1,6 @@
 Entries are sorted chronologically from oldest to youngest within each release,
 releases are sorted from youngest to oldest.
 
-
 version 0.6:
 
 - PB-frame decoding for H.263
@@ -79,6 +78,7 @@ version 0.6:
 - faster H.264 decoding
 - low overhead Ogg muxing
 - WebM support in Matroska demuxer
+- VP8 decoding via libvpx
 
 
 

configure

@@ -183,6 +183,7 @@ External library support:
   --enable-libtheora       enable Theora encoding via libtheora [no]
   --enable-libvorbis       enable Vorbis encoding via libvorbis,
                            native implementation exists [no]
+  --enable-libvpx          enable VP8 support via libvpx [no]
   --enable-libx264         enable H.264 encoding via x264 [no]
   --enable-libxvid         enable Xvid encoding via xvidcore,
                            native MPEG-4/Xvid encoder exists [no]
@@ -927,6 +928,7 @@ CONFIG_LIST="
     libspeex
     libtheora
     libvorbis
+    libvpx
     libx264
     libxvid
     lpc
@@ -1349,6 +1351,7 @@ libschroedinger_encoder_deps="libschroedinger"
 libspeex_decoder_deps="libspeex"
 libtheora_encoder_deps="libtheora"
 libvorbis_encoder_deps="libvorbis"
+libvpx_decoder_deps="libvpx"
 libx264_encoder_deps="libx264"
 libxvid_encoder_deps="libxvid"
 
@@ -2612,6 +2615,7 @@ enabled libschroedinger && add_cflags $(pkg-config --cflags schroedinger-1.0) &&
 enabled libspeex   && require  libspeex speex/speex.h speex_decoder_init -lspeex
 enabled libtheora  && require  libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
 enabled libvorbis  && require  libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
+enabled libvpx     && require2 libvpx "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_dec_init_ver" -lvpx
 enabled libx264    && require  libx264 x264.h x264_encoder_encode -lx264 -lm &&
                       { check_cpp_condition x264.h "X264_BUILD >= 83" ||
                         die "ERROR: libx264 version must be >= 0.83."; }
@@ -2881,6 +2885,7 @@ echo "libschroedinger enabled   ${libschroedinger-no}"
 echo "libspeex enabled          ${libspeex-no}"
 echo "libtheora enabled         ${libtheora-no}"
 echo "libvorbis enabled         ${libvorbis-no}"
+echo "libvpx enabled            ${libvpx-no}"
 echo "libx264 enabled           ${libx264-no}"
 echo "libxvid enabled           ${libxvid-no}"
 echo "zlib enabled              ${zlib-no}"

doc/general.texi

@@ -437,6 +437,8 @@ following image formats are supported:
     @tab fourcc: VP50
 @item On2 VP6                @tab     @tab  X
     @tab fourcc: VP60,VP61,VP62
+ at item VP8                    @tab     @tab  X
+    @tab fourcc: VP80, decoding supported through external library libvpx
 @item planar RGB             @tab     @tab  X
     @tab fourcc: 8BPS
 @item Q-team QPEG            @tab     @tab  X

libavcodec/Makefile

@@ -525,6 +525,7 @@ OBJS-$(CONFIG_LIBSCHROEDINGER_ENCODER)    += libschroedingerenc.o \
 OBJS-$(CONFIG_LIBSPEEX_DECODER)           += libspeexdec.o
 OBJS-$(CONFIG_LIBTHEORA_ENCODER)          += libtheoraenc.o
 OBJS-$(CONFIG_LIBVORBIS_ENCODER)          += libvorbis.o
+OBJS-$(CONFIG_LIBVPX_DECODER)             += libvpxdec.o
 OBJS-$(CONFIG_LIBX264_ENCODER)            += libx264.o
 OBJS-$(CONFIG_LIBXVID_ENCODER)            += libxvidff.o libxvid_rc.o
 

libavcodec/allcodecs.c

@@ -344,6 +344,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER (LIBSPEEX, libspeex);
     REGISTER_ENCODER (LIBTHEORA, libtheora);
     REGISTER_ENCODER (LIBVORBIS, libvorbis);
+    REGISTER_DECODER (LIBVPX, libvpx);
     REGISTER_ENCODER (LIBX264, libx264);
     REGISTER_ENCODER (LIBXVID, libxvid);
 

libavcodec/avcodec.h

@@ -30,8 +30,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 52
-#define LIBAVCODEC_VERSION_MINOR 66
+#define LIBAVCODEC_VERSION_MINOR 69
-#define LIBAVCODEC_VERSION_MICRO  0
+#define LIBAVCODEC_VERSION_MICRO  1
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \
@@ -210,6 +210,7 @@ enum CodecID {
     CODEC_ID_IFF_BYTERUN1,
     CODEC_ID_KGV1,
     CODEC_ID_YOP,
+    CODEC_ID_VP8,
 
     /* various PCM "codecs" */
     CODEC_ID_PCM_S16LE= 0x10000,

libavcodec/libvpxdec.c

@@ -0,0 +1,124 @@
+/*
+ * 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
+ */
+
+/**
+ * @file
+ * VP8 decoder support via libvpx
+ */
+
+#define VPX_CODEC_DISABLE_COMPAT 1
+#include <vpx/vpx_decoder.h>
+#include <vpx/vp8dx.h>
+
+#include "avcodec.h"
+
+typedef struct VP8DecoderContext {
+    struct vpx_codec_ctx decoder;
+} VP8Context;
+
+static av_cold int vp8_init(AVCodecContext *avctx)
+{
+    VP8Context *ctx = avctx->priv_data;
+    const struct vpx_codec_iface *iface = &vpx_codec_vp8_dx_algo;
+    struct vpx_codec_dec_cfg deccfg = {
+        /* token partitions+1 would be a decent choice */
+        .threads = FFMIN(avctx->thread_count, 16)
+    };
+
+    av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
+    av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
+
+    if (vpx_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != VPX_CODEC_OK) {
+        const char *error = vpx_codec_error(&ctx->decoder);
+        av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
+               error);
+        return AVERROR(EINVAL);
+    }
+
+    avctx->pix_fmt = PIX_FMT_YUV420P;
+    return 0;
+}
+
+static int vp8_decode(AVCodecContext *avctx,
+                      void *data, int *data_size, AVPacket *avpkt)
+{
+    VP8Context *ctx = avctx->priv_data;
+    AVFrame *picture = data;
+    const void *iter = NULL;
+    struct vpx_image *img;
+
+    if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
+        VPX_CODEC_OK) {
+        const char *error  = vpx_codec_error(&ctx->decoder);
+        const char *detail = vpx_codec_error_detail(&ctx->decoder);
+
+        av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
+        if (detail)
+            av_log(avctx, AV_LOG_ERROR, "  Additional information: %s\n",
+                   detail);
+        return AVERROR_INVALIDDATA;
+    }
+
+    if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) {
+        if (img->fmt != VPX_IMG_FMT_I420) {
+            av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d)\n",
+                   img->fmt);
+            return AVERROR_INVALIDDATA;
+        }
+
+        if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
+            av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
+                   avctx->width, avctx->height, img->d_w, img->d_h);
+            if (avcodec_check_dimensions(avctx, img->d_w, img->d_h))
+                return AVERROR_INVALIDDATA;
+            avcodec_set_dimensions(avctx, img->d_w, img->d_h);
+        }
+        picture->data[0]     = img->planes[0];
+        picture->data[1]     = img->planes[1];
+        picture->data[2]     = img->planes[2];
+        picture->data[3]     = NULL;
+        picture->linesize[0] = img->stride[0];
+        picture->linesize[1] = img->stride[1];
+        picture->linesize[2] = img->stride[2];
+        picture->linesize[3] = 0;
+        *data_size           = sizeof(AVPicture);
+    }
+    return avpkt->size;
+}
+
+static av_cold int vp8_free(AVCodecContext *avctx)
+{
+    VP8Context *ctx = avctx->priv_data;
+    vpx_codec_destroy(&ctx->decoder);
+    return 0;
+}
+
+AVCodec libvpx_decoder = {
+    "libvpx",
+    AVMEDIA_TYPE_VIDEO,
+    CODEC_ID_VP8,
+    sizeof(VP8Context),
+    vp8_init,
+    NULL, /* encode */
+    vp8_free,
+    vp8_decode,
+    0, /* capabilities */
+    .long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"),
+};