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https://github.com/FFmpeg/FFmpeg.git
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a247ac640d
Given that the AVCodec.next pointer has now been removed, most of the AVCodecs are not modified at all any more and can therefore be made const (as this patch does); the only exceptions are the very few codecs for external libraries that have a init_static_data callback. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>
445 lines
15 KiB
C
445 lines
15 KiB
C
/*
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* V4L2 mem2mem encoders
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*
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* Copyright (C) 2017 Alexis Ballier <aballier@gentoo.org>
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* Copyright (C) 2017 Jorge Ramirez <jorge.ramirez-ortiz@linaro.org>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/videodev2.h>
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#include <sys/ioctl.h>
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#include <search.h>
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#include "encode.h"
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#include "libavcodec/avcodec.h"
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#include "libavcodec/internal.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/pixfmt.h"
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#include "libavutil/opt.h"
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#include "profiles.h"
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#include "v4l2_context.h"
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#include "v4l2_m2m.h"
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#include "v4l2_fmt.h"
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#define MPEG_CID(x) V4L2_CID_MPEG_VIDEO_##x
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#define MPEG_VIDEO(x) V4L2_MPEG_VIDEO_##x
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static inline void v4l2_set_timeperframe(V4L2m2mContext *s, unsigned int num, unsigned int den)
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{
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struct v4l2_streamparm parm = { 0 };
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parm.type = V4L2_TYPE_IS_MULTIPLANAR(s->output.type) ? V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE : V4L2_BUF_TYPE_VIDEO_OUTPUT;
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parm.parm.output.timeperframe.denominator = den;
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parm.parm.output.timeperframe.numerator = num;
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if (ioctl(s->fd, VIDIOC_S_PARM, &parm) < 0)
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av_log(s->avctx, AV_LOG_WARNING, "Failed to set timeperframe");
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}
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static inline void v4l2_set_ext_ctrl(V4L2m2mContext *s, unsigned int id, signed int value, const char *name, int log_warning)
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{
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struct v4l2_ext_controls ctrls = { { 0 } };
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struct v4l2_ext_control ctrl = { 0 };
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/* set ctrls */
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ctrls.ctrl_class = V4L2_CTRL_CLASS_MPEG;
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ctrls.controls = &ctrl;
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ctrls.count = 1;
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/* set ctrl*/
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ctrl.value = value;
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ctrl.id = id;
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if (ioctl(s->fd, VIDIOC_S_EXT_CTRLS, &ctrls) < 0)
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av_log(s->avctx, log_warning || errno != EINVAL ? AV_LOG_WARNING : AV_LOG_DEBUG,
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"Failed to set %s: %s\n", name, strerror(errno));
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else
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av_log(s->avctx, AV_LOG_DEBUG, "Encoder: %s = %d\n", name, value);
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}
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static inline int v4l2_get_ext_ctrl(V4L2m2mContext *s, unsigned int id, signed int *value, const char *name, int log_warning)
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{
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struct v4l2_ext_controls ctrls = { { 0 } };
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struct v4l2_ext_control ctrl = { 0 };
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int ret;
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/* set ctrls */
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ctrls.ctrl_class = V4L2_CTRL_CLASS_MPEG;
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ctrls.controls = &ctrl;
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ctrls.count = 1;
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/* set ctrl*/
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ctrl.id = id ;
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ret = ioctl(s->fd, VIDIOC_G_EXT_CTRLS, &ctrls);
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if (ret < 0) {
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av_log(s->avctx, log_warning || errno != EINVAL ? AV_LOG_WARNING : AV_LOG_DEBUG,
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"Failed to get %s\n", name);
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return ret;
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}
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*value = ctrl.value;
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return 0;
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}
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static inline unsigned int v4l2_h264_profile_from_ff(int p)
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{
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static const struct h264_profile {
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unsigned int ffmpeg_val;
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unsigned int v4l2_val;
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} profile[] = {
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{ FF_PROFILE_H264_CONSTRAINED_BASELINE, MPEG_VIDEO(H264_PROFILE_CONSTRAINED_BASELINE) },
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{ FF_PROFILE_H264_HIGH_444_PREDICTIVE, MPEG_VIDEO(H264_PROFILE_HIGH_444_PREDICTIVE) },
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{ FF_PROFILE_H264_HIGH_422_INTRA, MPEG_VIDEO(H264_PROFILE_HIGH_422_INTRA) },
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{ FF_PROFILE_H264_HIGH_444_INTRA, MPEG_VIDEO(H264_PROFILE_HIGH_444_INTRA) },
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{ FF_PROFILE_H264_HIGH_10_INTRA, MPEG_VIDEO(H264_PROFILE_HIGH_10_INTRA) },
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{ FF_PROFILE_H264_HIGH_422, MPEG_VIDEO(H264_PROFILE_HIGH_422) },
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{ FF_PROFILE_H264_BASELINE, MPEG_VIDEO(H264_PROFILE_BASELINE) },
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{ FF_PROFILE_H264_EXTENDED, MPEG_VIDEO(H264_PROFILE_EXTENDED) },
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{ FF_PROFILE_H264_HIGH_10, MPEG_VIDEO(H264_PROFILE_HIGH_10) },
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{ FF_PROFILE_H264_MAIN, MPEG_VIDEO(H264_PROFILE_MAIN) },
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{ FF_PROFILE_H264_HIGH, MPEG_VIDEO(H264_PROFILE_HIGH) },
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};
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(profile); i++) {
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if (profile[i].ffmpeg_val == p)
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return profile[i].v4l2_val;
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}
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return AVERROR(ENOENT);
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}
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static inline int v4l2_mpeg4_profile_from_ff(int p)
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{
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static const struct mpeg4_profile {
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unsigned int ffmpeg_val;
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unsigned int v4l2_val;
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} profile[] = {
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{ FF_PROFILE_MPEG4_ADVANCED_CODING, MPEG_VIDEO(MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY) },
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{ FF_PROFILE_MPEG4_ADVANCED_SIMPLE, MPEG_VIDEO(MPEG4_PROFILE_ADVANCED_SIMPLE) },
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{ FF_PROFILE_MPEG4_SIMPLE_SCALABLE, MPEG_VIDEO(MPEG4_PROFILE_SIMPLE_SCALABLE) },
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{ FF_PROFILE_MPEG4_SIMPLE, MPEG_VIDEO(MPEG4_PROFILE_SIMPLE) },
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{ FF_PROFILE_MPEG4_CORE, MPEG_VIDEO(MPEG4_PROFILE_CORE) },
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};
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(profile); i++) {
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if (profile[i].ffmpeg_val == p)
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return profile[i].v4l2_val;
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}
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return AVERROR(ENOENT);
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}
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static int v4l2_check_b_frame_support(V4L2m2mContext *s)
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{
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if (s->avctx->max_b_frames)
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av_log(s->avctx, AV_LOG_WARNING, "Encoder does not support b-frames yet\n");
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v4l2_set_ext_ctrl(s, MPEG_CID(B_FRAMES), 0, "number of B-frames", 0);
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v4l2_get_ext_ctrl(s, MPEG_CID(B_FRAMES), &s->avctx->max_b_frames, "number of B-frames", 0);
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if (s->avctx->max_b_frames == 0)
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return 0;
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avpriv_report_missing_feature(s->avctx, "DTS/PTS calculation for V4L2 encoding");
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return AVERROR_PATCHWELCOME;
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}
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static inline void v4l2_subscribe_eos_event(V4L2m2mContext *s)
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{
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struct v4l2_event_subscription sub;
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memset(&sub, 0, sizeof(sub));
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sub.type = V4L2_EVENT_EOS;
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if (ioctl(s->fd, VIDIOC_SUBSCRIBE_EVENT, &sub) < 0)
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av_log(s->avctx, AV_LOG_WARNING,
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"the v4l2 driver does not support end of stream VIDIOC_SUBSCRIBE_EVENT\n");
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}
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static int v4l2_prepare_encoder(V4L2m2mContext *s)
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{
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AVCodecContext *avctx = s->avctx;
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int qmin_cid, qmax_cid, qmin, qmax;
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int ret, val;
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/**
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* requirements
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*/
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v4l2_subscribe_eos_event(s);
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ret = v4l2_check_b_frame_support(s);
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if (ret)
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return ret;
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/**
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* settingss
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*/
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if (avctx->framerate.num || avctx->framerate.den)
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v4l2_set_timeperframe(s, avctx->framerate.den, avctx->framerate.num);
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/* set ext ctrls */
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v4l2_set_ext_ctrl(s, MPEG_CID(HEADER_MODE), MPEG_VIDEO(HEADER_MODE_SEPARATE), "header mode", 0);
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v4l2_set_ext_ctrl(s, MPEG_CID(BITRATE) , avctx->bit_rate, "bit rate", 1);
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v4l2_set_ext_ctrl(s, MPEG_CID(FRAME_RC_ENABLE), 1, "frame level rate control", 0);
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v4l2_set_ext_ctrl(s, MPEG_CID(GOP_SIZE), avctx->gop_size,"gop size", 1);
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av_log(avctx, AV_LOG_DEBUG,
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"Encoder Context: id (%d), profile (%d), frame rate(%d/%d), number b-frames (%d), "
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"gop size (%d), bit rate (%"PRId64"), qmin (%d), qmax (%d)\n",
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avctx->codec_id, avctx->profile, avctx->framerate.num, avctx->framerate.den,
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avctx->max_b_frames, avctx->gop_size, avctx->bit_rate, avctx->qmin, avctx->qmax);
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switch (avctx->codec_id) {
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case AV_CODEC_ID_H264:
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if (avctx->profile != FF_PROFILE_UNKNOWN) {
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val = v4l2_h264_profile_from_ff(avctx->profile);
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if (val < 0)
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av_log(avctx, AV_LOG_WARNING, "h264 profile not found\n");
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else
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v4l2_set_ext_ctrl(s, MPEG_CID(H264_PROFILE), val, "h264 profile", 1);
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}
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qmin_cid = MPEG_CID(H264_MIN_QP);
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qmax_cid = MPEG_CID(H264_MAX_QP);
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qmin = 0;
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qmax = 51;
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break;
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case AV_CODEC_ID_MPEG4:
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if (avctx->profile != FF_PROFILE_UNKNOWN) {
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val = v4l2_mpeg4_profile_from_ff(avctx->profile);
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if (val < 0)
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av_log(avctx, AV_LOG_WARNING, "mpeg4 profile not found\n");
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else
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v4l2_set_ext_ctrl(s, MPEG_CID(MPEG4_PROFILE), val, "mpeg4 profile", 1);
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}
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qmin_cid = MPEG_CID(MPEG4_MIN_QP);
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qmax_cid = MPEG_CID(MPEG4_MAX_QP);
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if (avctx->flags & AV_CODEC_FLAG_QPEL)
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v4l2_set_ext_ctrl(s, MPEG_CID(MPEG4_QPEL), 1, "qpel", 1);
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qmin = 1;
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qmax = 31;
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break;
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case AV_CODEC_ID_H263:
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qmin_cid = MPEG_CID(H263_MIN_QP);
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qmax_cid = MPEG_CID(H263_MAX_QP);
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qmin = 1;
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qmax = 31;
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break;
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case AV_CODEC_ID_VP8:
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qmin_cid = MPEG_CID(VPX_MIN_QP);
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qmax_cid = MPEG_CID(VPX_MAX_QP);
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qmin = 0;
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qmax = 127;
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break;
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case AV_CODEC_ID_VP9:
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qmin_cid = MPEG_CID(VPX_MIN_QP);
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qmax_cid = MPEG_CID(VPX_MAX_QP);
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qmin = 0;
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qmax = 255;
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break;
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default:
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return 0;
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}
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if (avctx->qmin >= 0 && avctx->qmax >= 0 && avctx->qmin > avctx->qmax) {
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av_log(avctx, AV_LOG_WARNING, "Invalid qmin:%d qmax:%d. qmin should not "
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"exceed qmax\n", avctx->qmin, avctx->qmax);
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} else {
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qmin = avctx->qmin >= 0 ? avctx->qmin : qmin;
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qmax = avctx->qmax >= 0 ? avctx->qmax : qmax;
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}
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v4l2_set_ext_ctrl(s, qmin_cid, qmin, "minimum video quantizer scale",
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avctx->qmin >= 0);
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v4l2_set_ext_ctrl(s, qmax_cid, qmax, "maximum video quantizer scale",
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avctx->qmax >= 0);
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return 0;
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}
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static int v4l2_send_frame(AVCodecContext *avctx, const AVFrame *frame)
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{
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V4L2m2mContext *s = ((V4L2m2mPriv*)avctx->priv_data)->context;
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V4L2Context *const output = &s->output;
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#ifdef V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME
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if (frame && frame->pict_type == AV_PICTURE_TYPE_I)
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v4l2_set_ext_ctrl(s, MPEG_CID(FORCE_KEY_FRAME), 0, "force key frame", 1);
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#endif
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return ff_v4l2_context_enqueue_frame(output, frame);
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}
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static int v4l2_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
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{
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V4L2m2mContext *s = ((V4L2m2mPriv*)avctx->priv_data)->context;
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V4L2Context *const capture = &s->capture;
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V4L2Context *const output = &s->output;
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AVFrame *frame = s->frame;
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int ret;
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if (s->draining)
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goto dequeue;
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if (!frame->buf[0]) {
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ret = ff_encode_get_frame(avctx, frame);
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if (ret < 0 && ret != AVERROR_EOF)
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return ret;
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if (ret == AVERROR_EOF)
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frame = NULL;
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}
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ret = v4l2_send_frame(avctx, frame);
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if (ret != AVERROR(EAGAIN))
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av_frame_unref(frame);
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if (ret < 0 && ret != AVERROR(EAGAIN))
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return ret;
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if (!output->streamon) {
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ret = ff_v4l2_context_set_status(output, VIDIOC_STREAMON);
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if (ret) {
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av_log(avctx, AV_LOG_ERROR, "VIDIOC_STREAMON failed on output context\n");
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return ret;
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}
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}
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if (!capture->streamon) {
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ret = ff_v4l2_context_set_status(capture, VIDIOC_STREAMON);
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if (ret) {
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av_log(avctx, AV_LOG_ERROR, "VIDIOC_STREAMON failed on capture context\n");
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return ret;
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}
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}
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dequeue:
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return ff_v4l2_context_dequeue_packet(capture, avpkt);
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}
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static av_cold int v4l2_encode_init(AVCodecContext *avctx)
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{
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V4L2Context *capture, *output;
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V4L2m2mContext *s;
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V4L2m2mPriv *priv = avctx->priv_data;
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enum AVPixelFormat pix_fmt_output;
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uint32_t v4l2_fmt_output;
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int ret;
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ret = ff_v4l2_m2m_create_context(priv, &s);
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if (ret < 0)
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return ret;
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capture = &s->capture;
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output = &s->output;
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/* common settings output/capture */
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output->height = capture->height = avctx->height;
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output->width = capture->width = avctx->width;
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/* output context */
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output->av_codec_id = AV_CODEC_ID_RAWVIDEO;
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output->av_pix_fmt = avctx->pix_fmt;
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/* capture context */
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capture->av_codec_id = avctx->codec_id;
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capture->av_pix_fmt = AV_PIX_FMT_NONE;
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s->avctx = avctx;
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ret = ff_v4l2_m2m_codec_init(priv);
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if (ret) {
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av_log(avctx, AV_LOG_ERROR, "can't configure encoder\n");
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return ret;
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}
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if (V4L2_TYPE_IS_MULTIPLANAR(output->type))
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v4l2_fmt_output = output->format.fmt.pix_mp.pixelformat;
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else
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v4l2_fmt_output = output->format.fmt.pix.pixelformat;
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pix_fmt_output = ff_v4l2_format_v4l2_to_avfmt(v4l2_fmt_output, AV_CODEC_ID_RAWVIDEO);
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if (pix_fmt_output != avctx->pix_fmt) {
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt_output);
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av_log(avctx, AV_LOG_ERROR, "Encoder requires %s pixel format.\n", desc->name);
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return AVERROR(EINVAL);
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}
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return v4l2_prepare_encoder(s);
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}
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static av_cold int v4l2_encode_close(AVCodecContext *avctx)
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{
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return ff_v4l2_m2m_codec_end(avctx->priv_data);
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}
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#define OFFSET(x) offsetof(V4L2m2mPriv, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
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#define V4L_M2M_CAPTURE_OPTS \
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V4L_M2M_DEFAULT_OPTS,\
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{ "num_capture_buffers", "Number of buffers in the capture context", \
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OFFSET(num_capture_buffers), AV_OPT_TYPE_INT, {.i64 = 4 }, 4, INT_MAX, FLAGS }
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static const AVOption mpeg4_options[] = {
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V4L_M2M_CAPTURE_OPTS,
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FF_MPEG4_PROFILE_OPTS
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{ NULL },
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};
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static const AVOption options[] = {
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V4L_M2M_CAPTURE_OPTS,
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{ NULL },
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};
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static const AVCodecDefault v4l2_m2m_defaults[] = {
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{ "qmin", "-1" },
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{ "qmax", "-1" },
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{ NULL },
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};
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#define M2MENC_CLASS(NAME, OPTIONS_NAME) \
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static const AVClass v4l2_m2m_ ## NAME ## _enc_class = { \
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.class_name = #NAME "_v4l2m2m_encoder", \
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.item_name = av_default_item_name, \
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.option = OPTIONS_NAME, \
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.version = LIBAVUTIL_VERSION_INT, \
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};
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#define M2MENC(NAME, LONGNAME, OPTIONS_NAME, CODEC) \
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M2MENC_CLASS(NAME, OPTIONS_NAME) \
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const AVCodec ff_ ## NAME ## _v4l2m2m_encoder = { \
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.name = #NAME "_v4l2m2m" , \
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.long_name = NULL_IF_CONFIG_SMALL("V4L2 mem2mem " LONGNAME " encoder wrapper"), \
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.type = AVMEDIA_TYPE_VIDEO, \
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.id = CODEC , \
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.priv_data_size = sizeof(V4L2m2mPriv), \
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.priv_class = &v4l2_m2m_ ## NAME ##_enc_class, \
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.init = v4l2_encode_init, \
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.receive_packet = v4l2_receive_packet, \
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.close = v4l2_encode_close, \
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.defaults = v4l2_m2m_defaults, \
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.capabilities = AV_CODEC_CAP_HARDWARE | AV_CODEC_CAP_DELAY, \
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.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, \
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.wrapper_name = "v4l2m2m", \
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}
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|
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M2MENC(mpeg4,"MPEG4", mpeg4_options, AV_CODEC_ID_MPEG4);
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M2MENC(h263, "H.263", options, AV_CODEC_ID_H263);
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M2MENC(h264, "H.264", options, AV_CODEC_ID_H264);
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M2MENC(hevc, "HEVC", options, AV_CODEC_ID_HEVC);
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M2MENC(vp8, "VP8", options, AV_CODEC_ID_VP8);
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