H.264 encoding with x264 by (Måns Rullgård <mru inprovide com>)

Originally committed as revision 4024 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 167 insertions, 0 deletions

diff --git a/libavcodec/x264.c b/libavcodec/x264.c
new file mode 100644
index 0000000000..3f3aba68ef
--- /dev/null
+++ b/libavcodec/x264.c
@@ -0,0 +1,167 @@
+/*
+ * H.264 encoding using the x264 library
+ * Copyright (C) 2005  Måns Rullgård <mru@inprovide.com>
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "avcodec.h"
+#include <x264.h>
+
+typedef struct X264Context {
+    x264_param_t params;
+    x264_t *enc;
+    x264_picture_t pic;
+    AVFrame out_pic;
+} X264Context;
+
+static void
+X264_log(void *p, int level, const char *fmt, va_list args)
+{
+    static const int level_map[] = {
+	[X264_LOG_ERROR]   = AV_LOG_ERROR,
+	[X264_LOG_WARNING] = AV_LOG_ERROR,
+	[X264_LOG_INFO]    = AV_LOG_INFO,
+	[X264_LOG_DEBUG]   = AV_LOG_DEBUG
+    };
+
+    if(level < 0 || level > X264_LOG_DEBUG)
+	return;
+
+    av_vlog(p, level_map[level], fmt, args);
+}
+
+
+static int
+encode_nals(u_char *buf, int size, x264_nal_t *nals, int nnal)
+{
+    u_char *p = buf;
+    int i;
+
+    for(i = 0; i < nnal; i++){
+	int s = x264_nal_encode(p, &size, 1, nals + i);
+	if(s < 0)
+	    return -1;
+	p += s;
+    }
+
+    return p - buf;
+}
+
+extern int
+X264_frame(AVCodecContext *ctx, uint8_t *buf, int bufsize, void *data)
+{
+    X264Context *x4 = ctx->priv_data;
+    AVFrame *frame = data;
+    x264_nal_t *nal;
+    int nnal, i;
+    x264_picture_t pic_out;
+
+    x4->pic.img.i_csp = X264_CSP_I420;
+    x4->pic.img.i_plane = 3;
+
+    for(i = 0; i < 3; i++){
+	x4->pic.img.plane[i] = frame->data[i];
+	x4->pic.img.i_stride[i] = frame->linesize[i];
+    }
+
+    x4->pic.i_pts = frame->pts;
+    x4->pic.i_type = X264_TYPE_AUTO;
+
+    if(x264_encoder_encode(x4->enc, &nal, &nnal, &x4->pic, &pic_out))
+	return -1;
+
+    bufsize = encode_nals(buf, bufsize, nal, nnal);
+    if(bufsize < 0)
+	return -1;
+
+    /* FIXME: dts */
+    x4->out_pic.pts = pic_out.i_pts;
+
+    switch(pic_out.i_type){
+    case X264_TYPE_IDR:
+    case X264_TYPE_I:
+        x4->out_pic.pict_type = FF_I_TYPE;
+        break;
+    case X264_TYPE_P:
+        x4->out_pic.pict_type = FF_P_TYPE;
+        break;
+    case X264_TYPE_B:
+    case X264_TYPE_BREF:
+        x4->out_pic.pict_type = FF_B_TYPE;
+        break;
+    }
+
+    x4->out_pic.key_frame = x4->out_pic.key_frame == FF_I_TYPE;
+
+    return bufsize;
+}
+
+static int
+X264_close(AVCodecContext *avctx)
+{
+    X264Context *x4 = avctx->priv_data;
+
+    if(x4->enc)
+	x264_encoder_close(x4->enc);
+
+    return 0;
+}
+
+extern int
+X264_init(AVCodecContext *avctx)
+{
+    X264Context *x4 = avctx->priv_data;
+
+    x264_param_default(&x4->params);
+
+    x4->params.pf_log = X264_log;
+    x4->params.p_log_private = avctx;
+
+    x4->params.i_keyint_max = avctx->gop_size;
+    x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
+    x4->params.rc.i_rc_buffer_size = avctx->rc_buffer_size / 1000;
+    if(avctx->rc_buffer_size)
+        x4->params.rc.b_cbr = 1;
+    x4->params.rc.i_qp_min = avctx->qmin;
+    x4->params.rc.i_qp_max = avctx->qmax;
+    x4->params.rc.i_qp_step = avctx->max_qdiff;
+
+    x4->params.i_width = avctx->width;
+    x4->params.i_height = avctx->height;
+    x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
+    x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
+    x4->params.i_fps_num = avctx->frame_rate;
+    x4->params.i_fps_den = avctx->frame_rate_base;
+
+    x4->enc = x264_encoder_open(&x4->params);
+    if(!x4->enc)
+        return -1;
+
+    avctx->coded_frame = &x4->out_pic;
+
+    return 0;
+}
+
+AVCodec x264_encoder = {
+    .name = "h264",
+    .type = CODEC_TYPE_VIDEO,
+    .id = CODEC_ID_H264,
+    .priv_data_size = sizeof(X264Context),
+    .init = X264_init,
+    .encode = X264_frame,
+    .close = X264_close,
+    .pix_fmts = (enum PixelFormat[]) { PIX_FMT_YUV420P, -1 }
+};