Add a WebP decoder

Container and lossy decoding by Aneesh Dogra <aneesh@sugarlabs.org>
Lossless decoding by Justin Ruggles <justin.ruggles@gmail.com>

Changelog

@@ -33,6 +33,7 @@ version 10:
 - avconv -t option can now be used for inputs, to limit the duration of
   data read from an input file
 - incomplete Voxware MetaSound decoder
+- WebP decoder
 
 
 version 9:

configure

@@ -1692,6 +1692,7 @@ vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp"
 vp6a_decoder_select="vp6_decoder"
 vp6f_decoder_select="vp6_decoder"
 vp8_decoder_select="h264pred videodsp"
+webp_decoder_select="vp8_decoder"
 wmapro_decoder_select="mdct sinewin"
 wmav1_decoder_select="mdct sinewin"
 wmav1_encoder_select="mdct sinewin"

doc/general.texi

@@ -412,6 +412,8 @@ following image formats are supported:
     @tab YUV, JPEG and some extension is not supported yet.
 @item Truevision Targa  @tab X @tab X
     @tab Targa (.TGA) image format
+@item WebP         @tab @tab X
+    @tab WebP image format
 @item XBM  @tab X @tab
     @tab X BitMap image format
 @item XWD  @tab X @tab X

libavcodec/Makefile

@@ -390,6 +390,7 @@ OBJS-$(CONFIG_VP6_DECODER)             += vp6.o vp56.o vp56data.o vp56dsp.o \
 OBJS-$(CONFIG_VP8_DECODER)             += vp8.o vp8dsp.o vp56rac.o
 OBJS-$(CONFIG_VQA_DECODER)             += vqavideo.o
 OBJS-$(CONFIG_WAVPACK_DECODER)         += wavpack.o
+OBJS-$(CONFIG_WEBP_DECODER)            += webp.o
 OBJS-$(CONFIG_WMALOSSLESS_DECODER)     += wmalosslessdec.o wma_common.o
 OBJS-$(CONFIG_WMAPRO_DECODER)          += wmaprodec.o wma.o wma_common.o
 OBJS-$(CONFIG_WMAV1_DECODER)           += wmadec.o wma.o wma_common.o aactab.o

libavcodec/allcodecs.c

@@ -253,6 +253,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER(VP6F,              vp6f);
     REGISTER_DECODER(VP8,               vp8);
     REGISTER_DECODER(VQA,               vqa);
+    REGISTER_DECODER(WEBP,              webp);
     REGISTER_ENCDEC (WMV1,              wmv1);
     REGISTER_ENCDEC (WMV2,              wmv2);
     REGISTER_DECODER(WMV3,              wmv3);

libavcodec/avcodec.h

@@ -273,6 +273,7 @@ enum AVCodecID {
     AV_CODEC_ID_AIC,
     AV_CODEC_ID_ESCAPE130,
     AV_CODEC_ID_G2M,
+    AV_CODEC_ID_WEBP,
 
     /* various PCM "codecs" */
     AV_CODEC_ID_FIRST_AUDIO = 0x10000,     ///< A dummy id pointing at the start of audio codecs

libavcodec/codec_desc.c

@@ -1228,6 +1228,14 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .long_name = NULL_IF_CONFIG_SMALL("Go2Meeting"),
         .props     = AV_CODEC_PROP_LOSSY,
     },
+    {
+        .id        = AV_CODEC_ID_WEBP,
+        .type      = AVMEDIA_TYPE_VIDEO,
+        .name      = "webp",
+        .long_name = NULL_IF_CONFIG_SMALL("WebP"),
+        .props     = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY |
+                     AV_CODEC_PROP_LOSSLESS,
+    },
 
     /* various PCM "codecs" */
     {

libavcodec/version.h

@@ -27,7 +27,7 @@
  */
 
 #define LIBAVCODEC_VERSION_MAJOR 55
-#define LIBAVCODEC_VERSION_MINOR 18
+#define LIBAVCODEC_VERSION_MINOR 19
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

libavcodec/vp8.c

@@ -1853,8 +1853,8 @@ static int vp8_decode_mb_row_sliced(AVCodecContext *avctx, void *tdata,
     return 0;
 }
 
-static int vp8_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
-                            AVPacket *avpkt)
+int ff_vp8_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+                        AVPacket *avpkt)
 {
     VP8Context *s = avctx->priv_data;
     int ret, i, referenced, num_jobs;
@@ -2010,7 +2010,7 @@ err:
     return ret;
 }
 
-static av_cold int vp8_decode_free(AVCodecContext *avctx)
+av_cold int ff_vp8_decode_free(AVCodecContext *avctx)
 {
     VP8Context *s = avctx->priv_data;
     int i;
@@ -2033,7 +2033,7 @@ static av_cold int vp8_init_frames(VP8Context *s)
     return 0;
 }
 
-static av_cold int vp8_decode_init(AVCodecContext *avctx)
+av_cold int ff_vp8_decode_init(AVCodecContext *avctx)
 {
     VP8Context *s = avctx->priv_data;
     int ret;
@@ -2047,7 +2047,7 @@ static av_cold int vp8_decode_init(AVCodecContext *avctx)
     ff_vp8dsp_init(&s->vp8dsp);
 
     if ((ret = vp8_init_frames(s)) < 0) {
-        vp8_decode_free(avctx);
+        ff_vp8_decode_free(avctx);
         return ret;
     }
 
@@ -2062,7 +2062,7 @@ static av_cold int vp8_decode_init_thread_copy(AVCodecContext *avctx)
     s->avctx = avctx;
 
     if ((ret = vp8_init_frames(s)) < 0) {
-        vp8_decode_free(avctx);
+        ff_vp8_decode_free(avctx);
         return ret;
     }
 
@@ -2110,9 +2110,9 @@ AVCodec ff_vp8_decoder = {
     .type                  = AVMEDIA_TYPE_VIDEO,
     .id                    = AV_CODEC_ID_VP8,
     .priv_data_size        = sizeof(VP8Context),
-    .init                  = vp8_decode_init,
-    .close                 = vp8_decode_free,
-    .decode                = vp8_decode_frame,
+    .init                  = ff_vp8_decode_init,
+    .close                 = ff_vp8_decode_free,
+    .decode                = ff_vp8_decode_frame,
     .capabilities          = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS | CODEC_CAP_SLICE_THREADS,
     .flush                 = vp8_decode_flush,
     .long_name             = NULL_IF_CONFIG_SMALL("On2 VP8"),

libavcodec/vp8.h

@@ -269,4 +269,11 @@ typedef struct VP8Context {
     int mb_layout;
 } VP8Context;
 
+int ff_vp8_decode_init(AVCodecContext *avctx);
+
+int ff_vp8_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+                        AVPacket *avpkt);
+
+int ff_vp8_decode_free(AVCodecContext *avctx);
+
 #endif /* AVCODEC_VP8_H */

libavformat/img2.c

@@ -65,6 +65,7 @@ static const IdStrMap img_tags[] = {
     { AV_CODEC_ID_JPEG2000,   "j2k"      },
     { AV_CODEC_ID_DPX,        "dpx"      },
     { AV_CODEC_ID_PICTOR,     "pic"      },
+    { AV_CODEC_ID_WEBP,       "webp"     },
     { AV_CODEC_ID_XBM,        "xbm"      },
     { AV_CODEC_ID_XWD,        "xwd"      },
     { AV_CODEC_ID_NONE,       NULL       }