[FFmpeg-devel] [PATCH] added support for hardware assist H264 video encoding for the Raspberry Pi
Michael Niedermayer
michael at niedermayer.cc
Wed Apr 6 00:57:10 CEST 2016
On Tue, Apr 05, 2016 at 11:06:48PM +0200, Michael Niedermayer wrote:
> On Tue, Apr 05, 2016 at 12:00:26PM -0700, Amancio Hasty wrote:
> >
> > > On Mar 31, 2016, at 7:27 PM, Amancio Hasty <ahasty at gmail.com> wrote:
> > >
> > > I am not a lawyer…
> > >
> > >
> > > I updated the patch. vc264.c now has a the copyright notice embedded in
> > > a volatile global so if a binary is compiled against vc264.o , the copyright notice
> > > can be displayed by:
> > > strings ffmpeg | grep -i copyright
> > >
> > > LICENSE.md has been updated to include Broadcom’s copyright notice.
> > >
> > > A distribution of a binary that includes vc264.o should include LICENSE.md and if
> > > that is missing, the copyright notice can be displayed via the shell
> > > command ‘strings’ .
> > >
> > > Amancio
> > > <c-0001-added-support-for-hardware-assist-H264-video-encodin.patch>
> > >> On Mar 22, 2016, at 12:12 PM, Lou Logan <lou at lrcd.com> wrote:
> > >>
> > >> On Mon, 21 Mar 2016 20:07:01 -0700, Amancio Hasty wrote:
> > >>
> > >>> From 874a72eec2a78f4935fea091003e534b5f8d5413 Mon Sep 17 00:00:00 2001
> > >>> From: Amancio Hasty <ahasty at gmail.com>
> > >>> Date: Mon, 21 Mar 2016 18:56:05 -0700
> > >>> Subject: [PATCH] added support for hardware assist H264 video encoding for
> > >>> the Raspberry Pi
> > >>>
> > >>> ---
> > >>> configure | 12 ++
> > >>> libavcodec/Makefile | 1 +
> > >>> libavcodec/allcodecs.c | 2 +
> > >>> libavcodec/vc264.c | 387 +++++++++++++++++++++++++++++++++++++++++++++++++
> > >>> 4 files changed, 402 insertions(+)
> > >>> create mode 100644 libavcodec/vc264.c
> > >>>
> > >> [...]
> > >>> diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
> > >>> index 2a25d66..3c7bd9b 100644
> > >>> --- a/libavcodec/allcodecs.c
> > >>> +++ b/libavcodec/allcodecs.c
> > >>> @@ -74,6 +74,7 @@ void avcodec_register_all(void)
> > >>> initialized = 1;
> > >>>
> > >>
> > >> Nit: Whitespace on the line above should be removed.
> > >>
> > >> [...]
> > >>> --- /dev/null
> > >>> +++ b/libavcodec/vc264.c
> > >>> @@ -0,0 +1,387 @@
> > >>> +/* H.264 hardware assist video encoding code taken from
> > >>> + * raspberry's os :
> > >>> + * /opt/vc/src/hello_pi/hello_encode/encode.c
> > >>> + */
> > >>> +
> > >>> +/*
> > >>> +Copyright (c) 2012, Broadcom Europe Ltd
> > >>> +Copyright (c) 2012, Kalle Vahlman <zuh at iki>
> > >>> + Tuomas Kulve <tuomas at kulve.fi>
> > >>> +All rights reserved.
> > >>> +
> > >>> +Redistribution and use in source and binary forms, with or without
> > >>> +modification, are permitted provided that the following conditions are met:
> > >>> +* Redistributions of source code must retain the above copyright
> > >>> + notice, this list of conditions and the following disclaimer.
> > >>> + * Redistributions in binary form must reproduce the above copyright
> > >>> + notice, this list of conditions and the following disclaimer in the
> > >>> + documentation and/or other materials provided with the distribution.
> > >>> + * Neither the name of the copyright holder nor the
> > >>> + names of its contributors may be used to endorse or promote products
> > >>> + derived from this software without specific prior written permission.
> > >>> +
> > >>> +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
> > >>> +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
> > >>> +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
> > >>> +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
> > >>> +DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
> > >>> +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
> > >>> +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
> > >>> +ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> > >>> +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
> > >>> +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> > >>
> > >> I wonder if any of the above legalese is compatible. Granted, I see a
> > >> similar paragraph in "libavformat/aadec.c".
> > >>
> > >>> + * ffmpeg driver for hardware assist video H.264 encoding using Broadcom's GPU
> > >>> + * Copyright (C) 2016 Amancio Hasty ahasty at gmail.com
> > >>> + *
> > >>> + *
> > >>> + * 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
> > >>> + *
> > >>> + */
> > >>> +
> > >>> +
> > >>> +/**
> > >>> + * @ file vc264.c
> > >>> + * Broadcom bm2865's Visual Core hardware assist h264 using
> > >>> + openMax interface to the GPU.
> > >>> +
> > >>> +*/
> > >>> +
> > >>> +#include <stdio.h>
> > >>> +#include <stdlib.h>
> > >>> +#include <string.h>
> > >>> +#define OMX_SKIP64BIT
> > >>> +#include "bcm_host.h"
> > >>> +#include "ilclient.h"
> > >>> +#include "avcodec.h"
> > >>> +#include "internal.h"
> > >>> +
> > >>> +typedef struct VC264Context {
> > >>> + OMX_VIDEO_PARAM_PORTFORMATTYPE format;
> > >>> + OMX_PARAM_PORTDEFINITIONTYPE def;
> > >>> + COMPONENT_T *video_encode;
> > >>> + COMPONENT_T *list[5];
> > >>> + OMX_BUFFERHEADERTYPE *buf;
> > >>> + OMX_BUFFERHEADERTYPE *out;
> > >>> + ILCLIENT_T *client;
> > >>> + OMX_VIDEO_PARAM_BITRATETYPE bitrateType;
> > >>> + int width;
> > >>> + int height;
> > >>> + int bit_rate;
> > >>> +} VC264Context;
> > >>> +
> > >>> +
> > >>> +static int vc264_init(AVCodecContext *avctx) {
> > >>> +
> > >>> +
> > >>> +
> > >>> + OMX_ERRORTYPE r;
> > >>> + int error;
> > >>> +
> > >>> +
> > >>> +
> > >>> + VC264Context *vc = avctx->priv_data;
> > >>> +
> > >>> + vc->width = avctx->width;
> > >>> + vc->height = avctx->height;
> > >>> + vc->bit_rate = avctx->bit_rate;
> > >>> + printf("vc264: bit rate %d \n", avctx->bit_rate);
> > >>> +#if FF_API_CODED_FRAME
> > >>> +FF_DISABLE_DEPRECATION_WARNINGS
> > >>> +
> > >>> + avctx->coded_frame = av_frame_alloc();
> > >>> + avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
> > >>> +FF_ENABLE_DEPRECATION_WARNINGS
> > >>> +#endif
> > >>> +
> > >>> +
> > >>> + memset(&vc->list, 0, sizeof(vc->list));
> > >>> + bcm_host_init();
> > >>> + if ((vc->client = ilclient_init()) == NULL) {
> > >>> + return -3;
> > >>> + }
> > >>> + error = OMX_Init();
> > >>> +
> > >>> + if (error != OMX_ErrorNone) {
> > >>> + ilclient_destroy(vc->client);
> > >>> + av_log(avctx,AV_LOG_ERROR,"in vc264_init OMX_Init failed ");
> > >>> + return -4;
> > >>> + }
> > >>> +
> > >>> + // create video_encode
> > >>> + r = ilclient_create_component(vc->client, &vc->video_encode, (char *) "video_encode",
> > >>> + ILCLIENT_DISABLE_ALL_PORTS |
> > >>> + ILCLIENT_ENABLE_INPUT_BUFFERS |
> > >>> + ILCLIENT_ENABLE_OUTPUT_BUFFERS);
> > >>
> > >> Tabs should be converted to spaces. There are many instances of tabs
> > >> being used in this patch.
> > >>
> > >> Others will have to provide a more technical review (not to mention
> > >> possible additions docs, Changelog, MAINTAINERS, and
> > >> libavcodec/version.h).
> > >> _______________________________________________
> > >> ffmpeg-devel mailing list
> > >> ffmpeg-devel at ffmpeg.org
> > >> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> > >
> >
> > Well, ffmpeg is very popular in the Raspberry community. For example, motionpie uses it for
> > video monitoring;however, the encoding is done in software which limits its performance.
> >
> > So yes quite a bit number of users are waiting for hardware assist H264 encoding in ffmpeg.
>
> I see no harm in adding this, its a optional feature and apparently
> theres a user base who wants this
>
> thus i intend to apply this patch and state so with this mail
> if someone objects please state that clearly in a reply
from IRC:
<wm4> miI'm still against it
<wm4> s/mi/michaelni:/
so if you want this patch applied
talk with wm4
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
Awnsering whenever a program halts or runs forever is
On a turing machine, in general impossible (turings halting problem).
On any real computer, always possible as a real computer has a finite number
of states N, and will either halt in less than N cycles or never halt.
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