Add libx265 encoder

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

1 files changed, 284 insertions, 0 deletions

diff --git a/libavcodec/libx265.c b/libavcodec/libx265.c
new file mode 100644
index 0000000000..e63e0cb75d
--- /dev/null
+++ b/libavcodec/libx265.c
@@ -0,0 +1,284 @@
+/*
+ * libx265 encoder
+ *
+ * Copyright (c) 2013-2014 Derek Buitenhuis
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <x265.h>
+
+#include "libavutil/internal.h"
+#include "libavutil/common.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "avcodec.h"
+#include "internal.h"
+
+typedef struct libx265Context {
+    const AVClass *class;
+
+    x265_encoder *encoder;
+    x265_param   *params;
+    uint8_t      *header;
+    int           header_size;
+
+    char *preset;
+    char *tune;
+    char *x265_opts;
+} libx265Context;
+
+static int is_keyframe(NalUnitType naltype)
+{
+    switch (naltype) {
+    case NAL_UNIT_CODED_SLICE_BLA_W_LP:
+    case NAL_UNIT_CODED_SLICE_BLA_W_RADL:
+    case NAL_UNIT_CODED_SLICE_BLA_N_LP:
+    case NAL_UNIT_CODED_SLICE_IDR_W_RADL:
+    case NAL_UNIT_CODED_SLICE_IDR_N_LP:
+    case NAL_UNIT_CODED_SLICE_CRA:
+        return 1;
+    default:
+        return 0;
+    }
+}
+
+static av_cold int libx265_encode_close(AVCodecContext *avctx)
+{
+    libx265Context *ctx = avctx->priv_data;
+
+    av_frame_free(&avctx->coded_frame);
+    av_freep(&ctx->header);
+
+    x265_param_free(ctx->params);
+
+    if (ctx->encoder)
+        x265_encoder_close(ctx->encoder);
+
+    return 0;
+}
+
+static av_cold int libx265_encode_init(AVCodecContext *avctx)
+{
+    libx265Context *ctx = avctx->priv_data;
+    x265_nal *nal;
+    uint8_t *buf;
+    int nnal;
+    int ret;
+    int i;
+
+    avctx->coded_frame = av_frame_alloc();
+    if (!avctx->coded_frame) {
+        av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
+        return AVERROR(ENOMEM);
+    }
+
+    ctx->params = x265_param_alloc();
+    if (!ctx->params) {
+        av_log(avctx, AV_LOG_ERROR, "Could not allocate x265 param structure.\n");
+        return AVERROR(ENOMEM);
+    }
+
+    x265_param_default(ctx->params);
+    if (x265_param_default_preset(ctx->params, ctx->preset, ctx->tune) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid preset or tune.\n");
+        return AVERROR(EINVAL);
+    }
+
+    ctx->params->frameNumThreads = avctx->thread_count;
+    ctx->params->frameRate       = (int) (avctx->time_base.den / avctx->time_base.num);
+    ctx->params->sourceWidth     = avctx->width;
+    ctx->params->sourceHeight    = avctx->height;
+    ctx->params->inputBitDepth   = av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth_minus1 + 1;
+
+    if (avctx->bit_rate > 0) {
+        ctx->params->rc.bitrate         = avctx->bit_rate / 1000;
+        ctx->params->rc.rateControlMode = X265_RC_ABR;
+    }
+
+    if (ctx->x265_opts) {
+        AVDictionary *dict    = NULL;
+        AVDictionaryEntry *en = NULL;
+
+        if (!av_dict_parse_string(&dict, ctx->x265_opts, "=", ":", 0)) {
+            while ((en = av_dict_get(dict, "", en, AV_DICT_IGNORE_SUFFIX))) {
+                int parse_ret = x265_param_parse(ctx->params, en->key, en->value);
+
+                switch (parse_ret) {
+                case X265_PARAM_BAD_NAME:
+                    av_log(avctx, AV_LOG_WARNING,
+                          "Unknown option: %s.\n", en->key);
+                    break;
+                case X265_PARAM_BAD_VALUE:
+                    av_log(avctx, AV_LOG_WARNING,
+                          "Invalid value for %s: %s.\n", en->key, en->value);
+                    break;
+                default:
+                    break;
+                }
+            }
+            av_dict_free(&dict);
+        }
+    }
+
+    ctx->encoder = x265_encoder_open(ctx->params);
+    if (!ctx->encoder) {
+        av_log(avctx, AV_LOG_ERROR, "Cannot open libx265 encoder.\n");
+        libx265_encode_close(avctx);
+        return AVERROR_INVALIDDATA;
+    }
+
+    ret = x265_encoder_headers(ctx->encoder, &nal, &nnal);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Cannot encode headers.\n");
+        libx265_encode_close(avctx);
+        return AVERROR_INVALIDDATA;
+    }
+
+    for (i = 0; i < nnal; i++)
+        ctx->header_size += nal[i].sizeBytes;
+
+    ctx->header = av_malloc(ctx->header_size);
+    if (!ctx->header) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Cannot allocate HEVC header of size %d.\n", ctx->header_size);
+        libx265_encode_close(avctx);
+        return AVERROR(ENOMEM);
+    }
+
+    buf = ctx->header;
+    for (i = 0; i < nnal; i++) {
+        memcpy(buf, nal[i].payload, nal[i].sizeBytes);
+        buf += nal[i].sizeBytes;
+    }
+
+    return 0;
+}
+
+static int libx265_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                                const AVFrame *pic, int *got_packet)
+{
+    libx265Context *ctx = avctx->priv_data;
+    x265_picture x265pic;
+    x265_picture x265pic_out = { { 0 } };
+    x265_nal *nal;
+    uint8_t *dst;
+    int payload = 0;
+    int nnal;
+    int ret;
+    int i;
+
+    if (pic) {
+        for (i = 0; i < 3; i++) {
+           x265pic.planes[i] = pic->data[i];
+           x265pic.stride[i] = pic->linesize[i];
+        }
+
+        x265pic.pts = pic->pts;
+    }
+
+    ret = x265_encoder_encode(ctx->encoder, &nal, &nnal,
+                              pic ? &x265pic : NULL, &x265pic_out);
+    if (ret < 0)
+        return AVERROR_UNKNOWN;
+
+    if (!nnal)
+        return 0;
+
+    for (i = 0; i < nnal; i++)
+        payload += nal[i].sizeBytes;
+
+    payload += ctx->header_size;
+
+    ret = ff_alloc_packet(pkt, payload);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
+        return ret;
+    }
+    dst = pkt->data;
+
+    if (ctx->header) {
+        memcpy(dst, ctx->header, ctx->header_size);
+        dst += ctx->header_size;
+
+        av_freep(&ctx->header);
+        ctx->header_size = 0;
+    }
+
+    for (i = 0; i < nnal; i++) {
+        memcpy(dst, nal[i].payload, nal[i].sizeBytes);
+        dst += nal[i].sizeBytes;
+
+        if (is_keyframe(nal[i].type))
+            pkt->flags |= AV_PKT_FLAG_KEY;
+    }
+
+    pkt->pts = x265pic_out.pts;
+    pkt->dts = x265pic_out.dts;
+
+    *got_packet = 1;
+    return 0;
+}
+
+static const enum AVPixelFormat x265_csp_eight[] = {
+    AV_PIX_FMT_YUV420P,
+    AV_PIX_FMT_NONE
+};
+
+static const enum AVPixelFormat x265_csp_twelve[] = {
+    AV_PIX_FMT_YUV420P,
+    AV_PIX_FMT_YUV420P10,
+    AV_PIX_FMT_NONE
+};
+
+static av_cold void libx265_encode_init_csp(AVCodec *codec)
+{
+    if (x265_max_bit_depth == 8)
+        codec->pix_fmts = x265_csp_eight;
+    else if (x265_max_bit_depth == 12)
+        codec->pix_fmts = x265_csp_twelve;
+}
+
+#define OFFSET(x) offsetof(libx265Context, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "preset",      "set the x265 preset",                                                         OFFSET(preset),    AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
+    { "tune",        "set the x265 tune parameter",                                                 OFFSET(tune),      AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
+    { "x265-params", "set the x265 configuration using a :-separated list of key=value parameters", OFFSET(x265_opts), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
+    { NULL }
+};
+
+static const AVClass class = {
+    .class_name = "libx265",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVCodec ff_libx265_encoder = {
+    .name             = "libx265",
+    .long_name        = NULL_IF_CONFIG_SMALL("libx265 H.265 / HEVC"),
+    .type             = AVMEDIA_TYPE_VIDEO,
+    .id               = AV_CODEC_ID_HEVC,
+    .init             = libx265_encode_init,
+    .init_static_data = libx265_encode_init_csp,
+    .encode2          = libx265_encode_frame,
+    .close            = libx265_encode_close,
+    .priv_data_size   = sizeof(libx265Context),
+    .priv_class       = &class,
+    .capabilities     = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,
+};