Merge commit '8a3d9ca603f4d15ecaa9ca379cbaab4ecaec8ce4'

* commit '8a3d9ca603f4d15ecaa9ca379cbaab4ecaec8ce4':
  libavcodec: Add an OpenH264 encoder wrapper

Conflicts:
	Changelog
	configure
	libavcodec/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>

6 files changed, 236 insertions, 1 deletions

diff --git a/Changelog b/Changelog
index 4575e8b099..cc6a9eccb6 100644
--- a/Changelog
+++ b/Changelog
@@ -11,6 +11,7 @@ version <next>:
 - tblend filter
 - cropdetect support for non 8bpp, absolute (if limit >= 1) and relative (if limit < 1.0) threshold
 - Camellia symmetric block cipher
+- OpenH264 encoder wrapper
 
 
 version 2.5:
diff --git a/configure b/configure
index 50458eabb8..5557ea3193 100755
--- a/configure
+++ b/configure
@@ -226,6 +226,7 @@ External library support:
   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
   --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
   --enable-libopencv       enable video filtering via libopencv [no]
+  --enable-libopenh264     enable H264 encoding via OpenH264 [no]
   --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
   --enable-libopus         enable Opus de/encoding via libopus [no]
   --enable-libpulse        enable Pulseaudio input via libpulse [no]
@@ -1367,6 +1368,7 @@ EXTERNAL_LIBRARY_LIST="
     libopencore_amrnb
     libopencore_amrwb
     libopencv
+    libopenh264
     libopenjpeg
     libopus
     libpulse
@@ -2363,6 +2365,7 @@ libopencore_amrnb_decoder_deps="libopencore_amrnb"
 libopencore_amrnb_encoder_deps="libopencore_amrnb"
 libopencore_amrnb_encoder_select="audio_frame_queue"
 libopencore_amrwb_decoder_deps="libopencore_amrwb"
+libopenh264_encoder_deps="libopenh264"
 libopenjpeg_decoder_deps="libopenjpeg"
 libopenjpeg_encoder_deps="libopenjpeg"
 libopus_decoder_deps="libopus"
@@ -4886,6 +4889,7 @@ enabled libnut            && require libnut libnut.h nut_demuxer_init -lnut
 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
 enabled libopencv         && require_pkg_config opencv opencv/cxcore.h cvCreateImageHeader
+enabled libopenh264       && require_pkg_config openh264 wels/codec_api.h WelsGetCodecVersion
 enabled libopenjpeg       && { check_lib openjpeg.h opj_version -lopenmj2 -DOPJ_STATIC ||
                                check_lib openjpeg-1.5/openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
                                check_lib openjpeg.h opj_version -lopenjpeg -DOPJ_STATIC ||
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 107661bc38..6b85420931 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -734,6 +734,7 @@ OBJS-$(CONFIG_LIBMP3LAME_ENCODER)         += libmp3lame.o mpegaudiodecheader.o
 OBJS-$(CONFIG_LIBOPENCORE_AMRNB_DECODER)  += libopencore-amr.o
 OBJS-$(CONFIG_LIBOPENCORE_AMRNB_ENCODER)  += libopencore-amr.o
 OBJS-$(CONFIG_LIBOPENCORE_AMRWB_DECODER)  += libopencore-amr.o
+OBJS-$(CONFIG_LIBOPENH264_ENCODER)        += libopenh264enc.o
 OBJS-$(CONFIG_LIBOPENJPEG_DECODER)        += libopenjpegdec.o
 OBJS-$(CONFIG_LIBOPENJPEG_ENCODER)        += libopenjpegenc.o
 OBJS-$(CONFIG_LIBOPUS_DECODER)            += libopusdec.o libopus.o     \
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 8ceee2f1e4..053bca4f3b 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -511,6 +511,7 @@ void avcodec_register_all(void)
     REGISTER_ENCODER(LIBMP3LAME,        libmp3lame);
     REGISTER_ENCDEC (LIBOPENCORE_AMRNB, libopencore_amrnb);
     REGISTER_DECODER(LIBOPENCORE_AMRWB, libopencore_amrwb);
+    REGISTER_ENCODER(LIBOPENH264,       libopenh264);
     REGISTER_ENCDEC (LIBOPENJPEG,       libopenjpeg);
     REGISTER_ENCDEC (LIBOPUS,           libopus);
     REGISTER_ENCDEC (LIBSCHROEDINGER,   libschroedinger);
diff --git a/libavcodec/libopenh264enc.c b/libavcodec/libopenh264enc.c
new file mode 100644
index 0000000000..ed32b41b93
--- /dev/null
+++ b/libavcodec/libopenh264enc.c
@@ -0,0 +1,228 @@
+/*
+ * OpenH264 video encoder
+ * Copyright (C) 2014 Martin Storsjo
+ *
+ * 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
+ */
+
+#include <wels/codec_api.h>
+#include <wels/codec_ver.h>
+
+#include "libavutil/attributes.h"
+#include "libavutil/common.h"
+#include "libavutil/opt.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mathematics.h"
+
+#include "avcodec.h"
+#include "internal.h"
+
+typedef struct SVCContext {
+    const AVClass *av_class;
+    ISVCEncoder *encoder;
+    int slice_mode;
+    int loopfilter;
+    char *profile;
+} SVCContext;
+
+#define OFFSET(x) offsetof(SVCContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "slice_mode", "Slice mode", OFFSET(slice_mode), AV_OPT_TYPE_INT, { .i64 = SM_AUTO_SLICE }, SM_SINGLE_SLICE, SM_RESERVED, VE, "slice_mode" },
+    { "fixed", "A fixed number of slices", 0, AV_OPT_TYPE_CONST, { .i64 = SM_FIXEDSLCNUM_SLICE }, 0, 0, VE, "slice_mode" },
+    { "rowmb", "One slice per row of macroblocks", 0, AV_OPT_TYPE_CONST, { .i64 = SM_ROWMB_SLICE }, 0, 0, VE, "slice_mode" },
+    { "auto", "Automatic number of slices according to number of threads", 0, AV_OPT_TYPE_CONST, { .i64 = SM_AUTO_SLICE }, 0, 0, VE, "slice_mode" },
+    { "loopfilter", "Enable loop filter", OFFSET(loopfilter), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
+    { "profile", "Set profile restrictions", OFFSET(profile), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
+    { NULL }
+};
+
+static const AVClass class = {
+    "libopenh264enc", av_default_item_name, options, LIBAVUTIL_VERSION_INT
+};
+
+static av_cold int svc_encode_close(AVCodecContext *avctx)
+{
+    SVCContext *s = avctx->priv_data;
+
+    if (s->encoder)
+        WelsDestroySVCEncoder(s->encoder);
+    return 0;
+}
+
+static av_cold int svc_encode_init(AVCodecContext *avctx)
+{
+    SVCContext *s = avctx->priv_data;
+    SEncParamExt param = { 0 };
+    int err = AVERROR_UNKNOWN;
+    av_unused OpenH264Version libver;
+    (void)g_strCodecVer; // Avoid warnings due to unused static members from codec_ver.h
+
+    // Mingw GCC < 4.7 on x86_32 uses an incorrect/buggy ABI for the WelsGetCodecVersion
+    // function (for functions returning larger structs), thus skip the check in those
+    // configurations.
+#if !defined(_WIN32) || !defined(__GNUC__) || !ARCH_X86_32 || AV_GCC_VERSION_AT_LEAST(4, 7)
+    libver = WelsGetCodecVersion();
+    if (memcmp(&libver, &g_stCodecVersion, sizeof(libver))) {
+        av_log(avctx, AV_LOG_ERROR, "Incorrect library version loaded\n");
+        return AVERROR(EINVAL);
+    }
+#endif
+
+    if (WelsCreateSVCEncoder(&s->encoder)) {
+        av_log(avctx, AV_LOG_ERROR, "Unable to create encoder\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    (*s->encoder)->GetDefaultParams(s->encoder, &param);
+
+    param.fMaxFrameRate              = avctx->time_base.den / avctx->time_base.num;
+    param.iPicWidth                  = avctx->width;
+    param.iPicHeight                 = avctx->height;
+    param.iTargetBitrate             = avctx->bit_rate;
+    param.iMaxBitrate                = FFMAX(avctx->rc_max_rate, avctx->bit_rate);
+    param.iRCMode                    = RC_QUALITY_MODE;
+    param.iTemporalLayerNum          = 1;
+    param.iSpatialLayerNum           = 1;
+    param.bEnableDenoise             = 0;
+    param.bEnableBackgroundDetection = 1;
+    param.bEnableAdaptiveQuant       = 1;
+    param.bEnableFrameSkip           = 0;
+    param.bEnableLongTermReference   = 0;
+    param.iLtrMarkPeriod             = 30;
+    param.uiIntraPeriod              = avctx->gop_size;
+    param.bEnableSpsPpsIdAddition    = 0;
+    param.bPrefixNalAddingCtrl       = 0;
+    param.iLoopFilterDisableIdc      = !s->loopfilter;
+    param.iEntropyCodingModeFlag     = 0;
+    param.iMultipleThreadIdc         = avctx->thread_count;
+    if (s->profile && !strcmp(s->profile, "main"))
+        param.iEntropyCodingModeFlag = 1;
+    else if (!s->profile && avctx->coder_type == FF_CODER_TYPE_AC)
+        param.iEntropyCodingModeFlag = 1;
+
+    param.sSpatialLayers[0].iVideoWidth         = param.iPicWidth;
+    param.sSpatialLayers[0].iVideoHeight        = param.iPicHeight;
+    param.sSpatialLayers[0].fFrameRate          = param.fMaxFrameRate;
+    param.sSpatialLayers[0].iSpatialBitrate     = param.iTargetBitrate;
+    param.sSpatialLayers[0].iMaxSpatialBitrate  = param.iMaxBitrate;
+
+    if (avctx->slices > 1)
+        s->slice_mode = SM_FIXEDSLCNUM_SLICE;
+    param.sSpatialLayers[0].sSliceCfg.uiSliceMode               = s->slice_mode;
+    param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceNum = avctx->slices;
+
+    if ((*s->encoder)->InitializeExt(s->encoder, &param) != cmResultSuccess) {
+        av_log(avctx, AV_LOG_ERROR, "Initialize failed\n");
+        goto fail;
+    }
+
+    if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
+        SFrameBSInfo fbi = { 0 };
+        int i, size = 0;
+        (*s->encoder)->EncodeParameterSets(s->encoder, &fbi);
+        for (i = 0; i < fbi.sLayerInfo[0].iNalCount; i++)
+            size += fbi.sLayerInfo[0].pNalLengthInByte[i];
+        avctx->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
+        if (!avctx->extradata) {
+            err = AVERROR(ENOMEM);
+            goto fail;
+        }
+        avctx->extradata_size = size;
+        memcpy(avctx->extradata, fbi.sLayerInfo[0].pBsBuf, size);
+    }
+
+    return 0;
+
+fail:
+    svc_encode_close(avctx);
+    return err;
+}
+
+static int svc_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
+                            const AVFrame *frame, int *got_packet)
+{
+    SVCContext *s = avctx->priv_data;
+    SFrameBSInfo fbi = { 0 };
+    int i, ret;
+    int encoded;
+    SSourcePicture sp = { 0 };
+    int size = 0, layer, first_layer = 0;
+    int layer_size[MAX_LAYER_NUM_OF_FRAME] = { 0 };
+
+    sp.iColorFormat = videoFormatI420;
+    for (i = 0; i < 3; i++) {
+        sp.iStride[i] = frame->linesize[i];
+        sp.pData[i]   = frame->data[i];
+    }
+    sp.iPicWidth  = avctx->width;
+    sp.iPicHeight = avctx->height;
+
+    encoded = (*s->encoder)->EncodeFrame(s->encoder, &sp, &fbi);
+    if (encoded != cmResultSuccess) {
+        av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed\n");
+        return AVERROR_UNKNOWN;
+    }
+    if (fbi.eFrameType == videoFrameTypeSkip) {
+        av_log(avctx, AV_LOG_DEBUG, "frame skipped\n");
+        return 0;
+    }
+    first_layer = 0;
+    // Normal frames are returned with one single layers, while IDR
+    // frames have two layers, where the first layer contains the SPS/PPS.
+    // If using global headers, don't include the SPS/PPS in the returned
+    // packet - thus, only return one layer.
+    if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
+        first_layer = fbi.iLayerNum - 1;
+
+    for (layer = first_layer; layer < fbi.iLayerNum; layer++) {
+        for (i = 0; i < fbi.sLayerInfo[layer].iNalCount; i++)
+            layer_size[layer] += fbi.sLayerInfo[layer].pNalLengthInByte[i];
+        size += layer_size[layer];
+    }
+    av_log(NULL, AV_LOG_DEBUG, "%d slices\n", fbi.sLayerInfo[fbi.iLayerNum - 1].iNalCount);
+
+    if ((ret = ff_alloc_packet(avpkt, size))) {
+        av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+        return ret;
+    }
+    size = 0;
+    for (layer = first_layer; layer < fbi.iLayerNum; layer++) {
+        memcpy(avpkt->data + size, fbi.sLayerInfo[layer].pBsBuf, layer_size[layer]);
+        size += layer_size[layer];
+    }
+    avpkt->pts = frame->pts;
+    if (fbi.eFrameType == videoFrameTypeIDR)
+        avpkt->flags |= AV_PKT_FLAG_KEY;
+    *got_packet = 1;
+    return 0;
+}
+
+AVCodec ff_libopenh264_encoder = {
+    .name           = "libopenh264",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_H264,
+    .priv_data_size = sizeof(SVCContext),
+    .init           = svc_encode_init,
+    .encode2        = svc_encode_frame,
+    .close          = svc_encode_close,
+    .capabilities   = CODEC_CAP_AUTO_THREADS,
+    .pix_fmts       = (const enum PixelFormat[]){ AV_PIX_FMT_YUV420P,
+                                                  AV_PIX_FMT_NONE },
+    .long_name      = NULL_IF_CONFIG_SMALL("OpenH264"),
+    .priv_class     = &class,
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index d8c891de22..7e51f3b39e 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 56
-#define LIBAVCODEC_VERSION_MINOR  19
+#define LIBAVCODEC_VERSION_MINOR  20
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \