ffmpeg-2.8.5

git-svn-id: svn://kolibrios.org@6147 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavcodec/libutvideoenc.cpp

@@ -0,0 +1,249 @@
+/*
+ * Copyright (c) 2012 Derek Buitenhuis
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation;
+ * version 2 of the License.
+ *
+ * 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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
+ * Known FOURCCs:
+ *     'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA),
+ *     'ULH0' (YCbCr 4:2:0 BT.709), 'ULH2' (YCbCr 4:2:2 BT.709)
+ */
+
+extern "C" {
+#include "libavutil/avassert.h"
+#include "avcodec.h"
+#include "internal.h"
+}
+
+#include "libutvideo.h"
+#include "put_bits.h"
+
+static av_cold int utvideo_encode_init(AVCodecContext *avctx)
+{
+    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
+    UtVideoExtra *info;
+    uint32_t flags, in_format;
+    int ret;
+
+    switch (avctx->pix_fmt) {
+    case AV_PIX_FMT_YUV420P:
+        in_format = UTVF_YV12;
+        avctx->bits_per_coded_sample = 12;
+        if (avctx->colorspace == AVCOL_SPC_BT709)
+            avctx->codec_tag = MKTAG('U', 'L', 'H', '0');
+        else
+            avctx->codec_tag = MKTAG('U', 'L', 'Y', '0');
+        break;
+    case AV_PIX_FMT_YUYV422:
+        in_format = UTVF_YUYV;
+        avctx->bits_per_coded_sample = 16;
+        if (avctx->colorspace == AVCOL_SPC_BT709)
+            avctx->codec_tag = MKTAG('U', 'L', 'H', '2');
+        else
+            avctx->codec_tag = MKTAG('U', 'L', 'Y', '2');
+        break;
+    case AV_PIX_FMT_BGR24:
+        in_format = UTVF_NFCC_BGR_BU;
+        avctx->bits_per_coded_sample = 24;
+        avctx->codec_tag = MKTAG('U', 'L', 'R', 'G');
+        break;
+    case AV_PIX_FMT_RGB32:
+        in_format = UTVF_NFCC_BGRA_BU;
+        avctx->bits_per_coded_sample = 32;
+        avctx->codec_tag = MKTAG('U', 'L', 'R', 'A');
+        break;
+    default:
+        return AVERROR(EINVAL);
+    }
+
+    /* Check before we alloc anything */
+    if (avctx->prediction_method != 0 && avctx->prediction_method != 2) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid prediction method.\n");
+        return AVERROR(EINVAL);
+    }
+
+    flags = ((avctx->prediction_method + 1) << 8) | (avctx->thread_count - 1);
+
+    avctx->priv_data = utv;
+
+    /* Alloc extradata buffer */
+    info = (UtVideoExtra *)av_malloc(sizeof(*info));
+
+    if (!info) {
+        av_log(avctx, AV_LOG_ERROR, "Could not allocate extradata buffer.\n");
+        return AVERROR(ENOMEM);
+    }
+
+    /*
+     * We use this buffer to hold the data that Ut Video returns,
+     * since we cannot decode planes separately with it.
+     */
+    ret = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
+    if (ret < 0) {
+        av_free(info);
+        return ret;
+    }
+    utv->buf_size = ret;
+
+    utv->buffer = (uint8_t *)av_malloc(utv->buf_size);
+
+    if (utv->buffer == NULL) {
+        av_log(avctx, AV_LOG_ERROR, "Could not allocate output buffer.\n");
+        av_free(info);
+        return AVERROR(ENOMEM);
+    }
+
+    /*
+     * Create a Ut Video instance. Since the function wants
+     * an "interface name" string, pass it the name of the lib.
+     */
+    utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");
+
+    /* Initialize encoder */
+    utv->codec->EncodeBegin(in_format, avctx->width, avctx->height,
+                            CBGROSSWIDTH_WINDOWS);
+
+    /* Get extradata from encoder */
+    avctx->extradata_size = utv->codec->EncodeGetExtraDataSize();
+    utv->codec->EncodeGetExtraData(info, avctx->extradata_size, in_format,
+                                   avctx->width, avctx->height,
+                                   CBGROSSWIDTH_WINDOWS);
+    avctx->extradata = (uint8_t *)info;
+
+    /* Set flags */
+    utv->codec->SetState(&flags, sizeof(flags));
+
+    return 0;
+}
+
+static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                                const AVFrame *pic, int *got_packet)
+{
+    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
+    int w = avctx->width, h = avctx->height;
+    int ret, rgb_size, i;
+    bool keyframe;
+    uint8_t *y, *u, *v;
+    uint8_t *dst;
+
+    /* Alloc buffer */
+    if ((ret = ff_alloc_packet2(avctx, pkt, utv->buf_size, 0)) < 0)
+        return ret;
+
+    dst = pkt->data;
+
+    /* Move input if needed data into Ut Video friendly buffer */
+    switch (avctx->pix_fmt) {
+    case AV_PIX_FMT_YUV420P:
+        y = utv->buffer;
+        u = y + w * h;
+        v = u + w * h / 4;
+        for (i = 0; i < h; i++) {
+            memcpy(y, pic->data[0] + i * pic->linesize[0], w);
+            y += w;
+        }
+        for (i = 0; i < h / 2; i++) {
+            memcpy(u, pic->data[2] + i * pic->linesize[2], w >> 1);
+            memcpy(v, pic->data[1] + i * pic->linesize[1], w >> 1);
+            u += w >> 1;
+            v += w >> 1;
+        }
+        break;
+    case AV_PIX_FMT_YUYV422:
+        for (i = 0; i < h; i++)
+            memcpy(utv->buffer + i * (w << 1),
+                   pic->data[0] + i * pic->linesize[0], w << 1);
+        break;
+    case AV_PIX_FMT_BGR24:
+    case AV_PIX_FMT_RGB32:
+        /* Ut Video takes bottom-up BGR */
+        rgb_size = avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4;
+        for (i = 0; i < h; i++)
+            memcpy(utv->buffer + (h - i - 1) * w * rgb_size,
+                   pic->data[0] + i * pic->linesize[0],
+                   w * rgb_size);
+        break;
+    default:
+        return AVERROR(EINVAL);
+    }
+
+    /* Encode frame */
+    pkt->size = utv->codec->EncodeFrame(dst, &keyframe, utv->buffer);
+
+    if (!pkt->size) {
+        av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed!\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    /*
+     * Ut Video is intra-only and every frame is a keyframe,
+     * and the API always returns true. In case something
+     * durastic changes in the future, such as inter support,
+     * assert that this is true.
+     */
+    av_assert2(keyframe == true);
+
+    pkt->flags |= AV_PKT_FLAG_KEY;
+    *got_packet = 1;
+    return 0;
+}
+
+static av_cold int utvideo_encode_close(AVCodecContext *avctx)
+{
+    UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
+
+    av_freep(&avctx->extradata);
+    av_freep(&utv->buffer);
+
+    utv->codec->EncodeEnd();
+    CCodec::DeleteInstance(utv->codec);
+
+    return 0;
+}
+
+AVCodec ff_libutvideo_encoder = {
+    "libutvideo",
+    NULL_IF_CONFIG_SMALL("Ut Video"),
+    AVMEDIA_TYPE_VIDEO,
+    AV_CODEC_ID_UTVIDEO,
+    AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_LOSSLESS | AV_CODEC_CAP_INTRA_ONLY,
+    NULL, /* supported_framerates */
+    (const enum AVPixelFormat[]) {
+        AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUYV422, AV_PIX_FMT_BGR24,
+        AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
+    },
+    NULL, /* supported_samplerates */
+    NULL, /* sample_fmts */
+    NULL, /* channel_layouts */
+    0,    /* max_lowres */
+    NULL, /* priv_class */
+    NULL, /* profiles */
+    sizeof(UtVideoContext),
+    NULL, /* next */
+    NULL, /* init_thread_copy */
+    NULL, /* update_thread_context */
+    NULL, /* defaults */
+    NULL, /* init_static_data */
+    utvideo_encode_init,
+    NULL, /* encode */
+    utvideo_encode_frame,
+    NULL, /* decode */
+    utvideo_encode_close,
+    NULL, /* flush */
+};