lavc: add MMAL hardware decoder wrapper

Based on a patch by Rodger Combs.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Changelog

@@ -25,6 +25,7 @@ version <next>:
 - TDSC decoder
 - DTS lossless extension (XLL) decoding (not lossless, disabled by default)
 - Intel QSV-accelerated H.264 encoding
+- MMAL-accelerated H.264 decoding
 
 
 version 11:

configure

@@ -217,6 +217,7 @@ External library support:
   --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [auto]
   --enable-libxvid         enable Xvid encoding via xvidcore,
                            native MPEG-4/Xvid encoder exists [no]
+  --enable-mmal            enable decoding via MMAL [no]
   --enable-openssl         enable openssl [no]
   --enable-x11grab         enable X11 grabbing (legacy) [no]
   --enable-zlib            enable zlib [autodetect]
@@ -1182,6 +1183,7 @@ EXTERNAL_LIBRARY_LIST="
     libxcb_shm
     libxcb_xfixes
     libxvid
+    mmal
     openssl
     x11grab
     zlib
@@ -1970,6 +1972,10 @@ h263_vdpau_hwaccel_deps="vdpau"
 h263_vdpau_hwaccel_select="h263_decoder"
 h264_dxva2_hwaccel_deps="dxva2"
 h264_dxva2_hwaccel_select="h264_decoder"
+h264_mmal_decoder_deps="mmal"
+h264_mmal_hwaccel_deps="mmal"
+h264_mmal_decoder_select="h264_decoder"
+h264_mmal_encoder_deps="mmal"
 h264_qsv_hwaccel_deps="libmfx"
 h264_vaapi_hwaccel_deps="vaapi"
 h264_vaapi_hwaccel_select="h264_decoder"
@@ -4255,6 +4261,13 @@ enabled libx265           && require_pkg_config x265 x265.h x265_encoder_encode
                                die "ERROR: libx265 version must be >= 17."; }
 enabled libxavs           && require libxavs xavs.h xavs_encoder_encode -lxavs
 enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
+enabled mmal              && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
+                                { ! enabled cross_compile && {
+                                    add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline ;
+                                    add_extralibs -L/opt/vc/lib/ -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ;
+                                    check_lib interface/mmal/mmal.h mmal_port_connect ; }
+                                check_lib interface/mmal/mmal.h mmal_port_connect ; } ||
+                               die "ERROR: mmal not found"; }
 enabled openssl           && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
                                check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
                                check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||

doc/APIchanges

@@ -13,6 +13,9 @@ libavutil:     2014-08-09
 
 API changes, most recent first:
 
+2015-xx-xx - xxxxxxx - lavu 54.10.0
+  Add AV_PIX_FMT_MMAL for MMAL hardware acceleration.
+
 2015-xx-xx - xxxxxxx - lavc 56.13
   Add width, height, coded_width, coded_height and format to
   AVCodecParserContext.

libavcodec/Makefile

@@ -224,6 +224,7 @@ OBJS-$(CONFIG_H264_DECODER)            += h264.o h264_cabac.o h264_cavlc.o \
                                           h264_direct.o h264_loopfilter.o  \
                                           h264_mb.o h264_picture.o h264_ps.o \
                                           h264_refs.o h264_sei.o h264_slice.o
+OBJS-$(CONFIG_H264_MMAL_DECODER)       += mmaldec.o
 OBJS-$(CONFIG_H264_QSV_DECODER)        += qsvdec_h264.o
 OBJS-$(CONFIG_H264_QSV_ENCODER)        += qsvenc_h264.o
 OBJS-$(CONFIG_HEVC_DECODER)            += hevc.o hevc_mvs.o hevc_ps.o hevc_sei.o \

libavcodec/allcodecs.c

@@ -77,6 +77,7 @@ void avcodec_register_all(void)
     REGISTER_HWACCEL(H263_VAAPI,        h263_vaapi);
     REGISTER_HWACCEL(H263_VDPAU,        h263_vdpau);
     REGISTER_HWACCEL(H264_DXVA2,        h264_dxva2);
+    REGISTER_HWACCEL(H264_MMAL,         h264_mmal);
     REGISTER_HWACCEL(H264_QSV,          h264_qsv);
     REGISTER_HWACCEL(H264_VAAPI,        h264_vaapi);
     REGISTER_HWACCEL(H264_VDA,          h264_vda);
@@ -161,6 +162,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER(H263I,             h263i);
     REGISTER_ENCODER(H263P,             h263p);
     REGISTER_DECODER(H264,              h264);
+    REGISTER_DECODER(H264_MMAL,         h264_mmal);
     REGISTER_DECODER(H264_QSV,          h264_qsv);
     REGISTER_DECODER(HEVC,              hevc);
     REGISTER_DECODER(HNM4_VIDEO,        hnm4_video);

libavcodec/version.h

@@ -29,7 +29,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 56
-#define LIBAVCODEC_VERSION_MINOR 20
+#define LIBAVCODEC_VERSION_MINOR 21
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

libavutil/pixdesc.c

@@ -1567,6 +1567,10 @@ const AVPixFmtDescriptor av_pix_fmt_descriptors[AV_PIX_FMT_NB] = {
         .name = "qsv",
         .flags = AV_PIX_FMT_FLAG_HWACCEL,
     },
+    [AV_PIX_FMT_MMAL] = {
+        .name = "mmal",
+        .flags = AV_PIX_FMT_FLAG_HWACCEL,
+    },
 };
 
 static const char *color_range_names[AVCOL_RANGE_NB] = {

libavutil/pixfmt.h

@@ -214,6 +214,11 @@ enum AVPixelFormat {
      *  mfxFrameSurface1 structure.
      */
     AV_PIX_FMT_QSV,
+    /**
+     * HW acceleration though MMAL, data[3] contains a pointer to the
+     * MMAL_BUFFER_HEADER_T structure.
+     */
+    AV_PIX_FMT_MMAL,
 
     AV_PIX_FMT_NB,        ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
 

libavutil/version.h

@@ -54,8 +54,8 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR 54
-#define LIBAVUTIL_VERSION_MINOR  9
-#define LIBAVUTIL_VERSION_MICRO  1
+#define LIBAVUTIL_VERSION_MINOR 10
+#define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \