|
- /*
- * V4L2 mem2mem encoders
- *
- * Copyright (C) 2017 Alexis Ballier <aballier@gentoo.org>
- * Copyright (C) 2017 Jorge Ramirez <jorge.ramirez-ortiz@linaro.org>
- *
- * 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
- */
-
- #include <linux/videodev2.h>
- #include <sys/ioctl.h>
- #include <search.h>
- #include "libavcodec/avcodec.h"
- #include "libavutil/pixdesc.h"
- #include "libavutil/pixfmt.h"
- #include "libavutil/opt.h"
- #include "v4l2_context.h"
- #include "v4l2_m2m.h"
-
- #define MPEG_CID(x) V4L2_CID_MPEG_VIDEO_##x
- #define MPEG_VIDEO(x) V4L2_MPEG_VIDEO_##x
-
- static inline void v4l2_set_timeperframe(V4L2m2mContext *s, unsigned int num, unsigned int den)
- {
- struct v4l2_streamparm parm = { 0 };
-
- parm.type = V4L2_TYPE_IS_MULTIPLANAR(s->output.type) ? V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE : V4L2_BUF_TYPE_VIDEO_OUTPUT;
- parm.parm.output.timeperframe.denominator = den;
- parm.parm.output.timeperframe.numerator = num;
-
- if (ioctl(s->fd, VIDIOC_S_PARM, &parm) < 0)
- av_log(s->avctx, AV_LOG_WARNING, "Failed to set timeperframe");
- }
-
- static inline void v4l2_set_ext_ctrl(V4L2m2mContext *s, unsigned int id, signed int value, const char *name)
- {
- struct v4l2_ext_controls ctrls = { { 0 } };
- struct v4l2_ext_control ctrl = { 0 };
-
- /* set ctrls */
- ctrls.ctrl_class = V4L2_CTRL_CLASS_MPEG;
- ctrls.controls = &ctrl;
- ctrls.count = 1;
-
- /* set ctrl*/
- ctrl.value = value;
- ctrl.id = id ;
-
- if (ioctl(s->fd, VIDIOC_S_EXT_CTRLS, &ctrls) < 0)
- av_log(s->avctx, AV_LOG_WARNING, "Failed to set %s\n", name);
- else
- av_log(s->avctx, AV_LOG_DEBUG, "Encoder: %s = %d\n", name, value);
- }
-
- static inline int v4l2_get_ext_ctrl(V4L2m2mContext *s, unsigned int id, signed int *value, const char *name)
- {
- struct v4l2_ext_controls ctrls = { { 0 } };
- struct v4l2_ext_control ctrl = { 0 };
- int ret;
-
- /* set ctrls */
- ctrls.ctrl_class = V4L2_CTRL_CLASS_MPEG;
- ctrls.controls = &ctrl;
- ctrls.count = 1;
-
- /* set ctrl*/
- ctrl.id = id ;
-
- ret = ioctl(s->fd, VIDIOC_G_EXT_CTRLS, &ctrls);
- if (ret < 0) {
- av_log(s->avctx, AV_LOG_WARNING, "Failed to set %s\n", name);
- return ret;
- }
-
- *value = ctrl.value;
-
- return 0;
- }
-
- static inline unsigned int v4l2_h264_profile_from_ff(int p)
- {
- static const struct h264_profile {
- unsigned int ffmpeg_val;
- unsigned int v4l2_val;
- } profile[] = {
- { FF_PROFILE_H264_CONSTRAINED_BASELINE, MPEG_VIDEO(H264_PROFILE_CONSTRAINED_BASELINE) },
- { FF_PROFILE_H264_HIGH_444_PREDICTIVE, MPEG_VIDEO(H264_PROFILE_HIGH_444_PREDICTIVE) },
- { FF_PROFILE_H264_HIGH_422_INTRA, MPEG_VIDEO(H264_PROFILE_HIGH_422_INTRA) },
- { FF_PROFILE_H264_HIGH_444_INTRA, MPEG_VIDEO(H264_PROFILE_HIGH_444_INTRA) },
- { FF_PROFILE_H264_HIGH_10_INTRA, MPEG_VIDEO(H264_PROFILE_HIGH_10_INTRA) },
- { FF_PROFILE_H264_HIGH_422, MPEG_VIDEO(H264_PROFILE_HIGH_422) },
- { FF_PROFILE_H264_BASELINE, MPEG_VIDEO(H264_PROFILE_BASELINE) },
- { FF_PROFILE_H264_EXTENDED, MPEG_VIDEO(H264_PROFILE_EXTENDED) },
- { FF_PROFILE_H264_HIGH_10, MPEG_VIDEO(H264_PROFILE_HIGH_10) },
- { FF_PROFILE_H264_MAIN, MPEG_VIDEO(H264_PROFILE_MAIN) },
- { FF_PROFILE_H264_HIGH, MPEG_VIDEO(H264_PROFILE_HIGH) },
- };
- int i;
-
- for (i = 0; i < FF_ARRAY_ELEMS(profile); i++) {
- if (profile[i].ffmpeg_val == p)
- return profile[i].v4l2_val;
- }
- return AVERROR(ENOENT);
- }
-
- static inline int v4l2_mpeg4_profile_from_ff(int p)
- {
- static const struct mpeg4_profile {
- unsigned int ffmpeg_val;
- unsigned int v4l2_val;
- } profile[] = {
- { FF_PROFILE_MPEG4_ADVANCED_CODING, MPEG_VIDEO(MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY) },
- { FF_PROFILE_MPEG4_ADVANCED_SIMPLE, MPEG_VIDEO(MPEG4_PROFILE_ADVANCED_SIMPLE) },
- { FF_PROFILE_MPEG4_SIMPLE_SCALABLE, MPEG_VIDEO(MPEG4_PROFILE_SIMPLE_SCALABLE) },
- { FF_PROFILE_MPEG4_SIMPLE, MPEG_VIDEO(MPEG4_PROFILE_SIMPLE) },
- { FF_PROFILE_MPEG4_CORE, MPEG_VIDEO(MPEG4_PROFILE_CORE) },
- };
- int i;
-
- for (i = 0; i < FF_ARRAY_ELEMS(profile); i++) {
- if (profile[i].ffmpeg_val == p)
- return profile[i].v4l2_val;
- }
- return AVERROR(ENOENT);
- }
-
- static int v4l2_check_b_frame_support(V4L2m2mContext *s)
- {
- if (s->avctx->max_b_frames)
- av_log(s->avctx, AV_LOG_WARNING, "Encoder does not support b-frames yet\n");
-
- v4l2_set_ext_ctrl(s, MPEG_CID(B_FRAMES), 0, "number of B-frames");
- v4l2_get_ext_ctrl(s, MPEG_CID(B_FRAMES), &s->avctx->max_b_frames, "number of B-frames");
- if (s->avctx->max_b_frames == 0)
- return 0;
-
- avpriv_report_missing_feature(s->avctx, "DTS/PTS calculation for V4L2 encoding");
-
- return AVERROR_PATCHWELCOME;
- }
-
- static int v4l2_prepare_encoder(V4L2m2mContext *s)
- {
- AVCodecContext *avctx = s->avctx;
- int qmin_cid, qmax_cid, qmin, qmax;
- int ret, val;
-
- /**
- * requirements
- */
- ret = v4l2_check_b_frame_support(s);
- if (ret)
- return ret;
-
- /**
- * settingss
- */
- if (avctx->framerate.num || avctx->framerate.den)
- v4l2_set_timeperframe(s, avctx->framerate.num, avctx->framerate.den);
-
- /* set ext ctrls */
- v4l2_set_ext_ctrl(s, MPEG_CID(HEADER_MODE), MPEG_VIDEO(HEADER_MODE_SEPARATE), "header mode");
- v4l2_set_ext_ctrl(s, MPEG_CID(BITRATE) , avctx->bit_rate, "bit rate");
- v4l2_set_ext_ctrl(s, MPEG_CID(GOP_SIZE), avctx->gop_size,"gop size");
-
- av_log(avctx, AV_LOG_DEBUG,
- "Encoder Context: id (%d), profile (%d), frame rate(%d/%d), number b-frames (%d), "
- "gop size (%d), bit rate (%"PRId64"), qmin (%d), qmax (%d)\n",
- avctx->codec_id, avctx->profile, avctx->framerate.num, avctx->framerate.den,
- avctx->max_b_frames, avctx->gop_size, avctx->bit_rate, avctx->qmin, avctx->qmax);
-
- switch (avctx->codec_id) {
- case AV_CODEC_ID_H264:
- val = v4l2_h264_profile_from_ff(avctx->profile);
- if (val < 0)
- av_log(avctx, AV_LOG_WARNING, "h264 profile not found\n");
- else
- v4l2_set_ext_ctrl(s, MPEG_CID(H264_PROFILE), val, "h264 profile");
- qmin_cid = MPEG_CID(H264_MIN_QP);
- qmax_cid = MPEG_CID(H264_MAX_QP);
- qmin = 0;
- qmax = 51;
- break;
- case AV_CODEC_ID_MPEG4:
- val = v4l2_mpeg4_profile_from_ff(avctx->profile);
- if (val < 0)
- av_log(avctx, AV_LOG_WARNING, "mpeg4 profile not found\n");
- else
- v4l2_set_ext_ctrl(s, MPEG_CID(MPEG4_PROFILE), val, "mpeg4 profile");
- qmin_cid = MPEG_CID(MPEG4_MIN_QP);
- qmax_cid = MPEG_CID(MPEG4_MAX_QP);
- if (avctx->flags & AV_CODEC_FLAG_QPEL)
- v4l2_set_ext_ctrl(s, MPEG_CID(MPEG4_QPEL), 1, "qpel");
- qmin = 1;
- qmax = 31;
- break;
- case AV_CODEC_ID_H263:
- qmin_cid = MPEG_CID(H263_MIN_QP);
- qmax_cid = MPEG_CID(H263_MAX_QP);
- qmin = 1;
- qmax = 31;
- break;
- case AV_CODEC_ID_VP8:
- qmin_cid = MPEG_CID(VPX_MIN_QP);
- qmax_cid = MPEG_CID(VPX_MAX_QP);
- qmin = 0;
- qmax = 127;
- break;
- case AV_CODEC_ID_VP9:
- qmin_cid = MPEG_CID(VPX_MIN_QP);
- qmax_cid = MPEG_CID(VPX_MAX_QP);
- qmin = 0;
- qmax = 255;
- break;
- default:
- return 0;
- }
-
- if (qmin != avctx->qmin || qmax != avctx->qmax)
- av_log(avctx, AV_LOG_WARNING, "Encoder adjusted: qmin (%d), qmax (%d)\n", qmin, qmax);
-
- v4l2_set_ext_ctrl(s, qmin_cid, qmin, "minimum video quantizer scale");
- v4l2_set_ext_ctrl(s, qmax_cid, qmax, "maximum video quantizer scale");
-
- return 0;
- }
-
- static int v4l2_send_frame(AVCodecContext *avctx, const AVFrame *frame)
- {
- V4L2m2mContext *s = ((V4L2m2mPriv*)avctx->priv_data)->context;
- V4L2Context *const output = &s->output;
-
- return ff_v4l2_context_enqueue_frame(output, frame);
- }
-
- static int v4l2_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
- {
- V4L2m2mContext *s = ((V4L2m2mPriv*)avctx->priv_data)->context;
- V4L2Context *const capture = &s->capture;
- V4L2Context *const output = &s->output;
- int ret;
-
- if (s->draining)
- goto dequeue;
-
- if (!output->streamon) {
- ret = ff_v4l2_context_set_status(output, VIDIOC_STREAMON);
- if (ret) {
- av_log(avctx, AV_LOG_ERROR, "VIDIOC_STREAMOFF failed on output context\n");
- return ret;
- }
- }
-
- if (!capture->streamon) {
- ret = ff_v4l2_context_set_status(capture, VIDIOC_STREAMON);
- if (ret) {
- av_log(avctx, AV_LOG_ERROR, "VIDIOC_STREAMON failed on capture context\n");
- return ret;
- }
- }
-
- dequeue:
- return ff_v4l2_context_dequeue_packet(capture, avpkt);
- }
-
- static av_cold int v4l2_encode_init(AVCodecContext *avctx)
- {
- V4L2Context *capture, *output;
- V4L2m2mContext *s;
- int ret;
-
- ret = ff_v4l2_m2m_create_context(avctx, &s);
- if (ret < 0)
- return ret;
-
- capture = &s->capture;
- output = &s->output;
-
- /* common settings output/capture */
- output->height = capture->height = avctx->height;
- output->width = capture->width = avctx->width;
-
- /* output context */
- output->av_codec_id = AV_CODEC_ID_RAWVIDEO;
- output->av_pix_fmt = avctx->pix_fmt;
-
- /* capture context */
- capture->av_codec_id = avctx->codec_id;
- capture->av_pix_fmt = AV_PIX_FMT_NONE;
-
- ret = ff_v4l2_m2m_codec_init(avctx);
- if (ret) {
- av_log(avctx, AV_LOG_ERROR, "can't configure encoder\n");
- return ret;
- }
-
- return v4l2_prepare_encoder(s);
- }
-
- #define OFFSET(x) offsetof(V4L2m2mPriv, x)
- #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
-
- static const AVOption options[] = {
- V4L_M2M_DEFAULT_OPTS,
- { "num_capture_buffers", "Number of buffers in the capture context",
- OFFSET(num_capture_buffers), AV_OPT_TYPE_INT, {.i64 = 4 }, 4, INT_MAX, FLAGS },
- { NULL },
- };
-
- #define M2MENC(NAME, LONGNAME, CODEC) \
- static const AVClass v4l2_m2m_ ## NAME ## _enc_class = {\
- .class_name = #NAME "_v4l2_m2m_encoder",\
- .item_name = av_default_item_name,\
- .option = options,\
- .version = LIBAVUTIL_VERSION_INT,\
- };\
- \
- AVCodec ff_ ## NAME ## _v4l2m2m_encoder = { \
- .name = #NAME "_v4l2m2m" ,\
- .long_name = NULL_IF_CONFIG_SMALL("V4L2 mem2mem " LONGNAME " encoder wrapper"),\
- .type = AVMEDIA_TYPE_VIDEO,\
- .id = CODEC ,\
- .priv_data_size = sizeof(V4L2m2mPriv),\
- .priv_class = &v4l2_m2m_ ## NAME ##_enc_class,\
- .init = v4l2_encode_init,\
- .send_frame = v4l2_send_frame,\
- .receive_packet = v4l2_receive_packet,\
- .close = ff_v4l2_m2m_codec_end,\
- .capabilities = AV_CODEC_CAP_HARDWARE | AV_CODEC_CAP_DELAY, \
- .wrapper_name = "v4l2m2m", \
- };
-
- M2MENC(mpeg4,"MPEG4", AV_CODEC_ID_MPEG4);
- M2MENC(h263, "H.263", AV_CODEC_ID_H263);
- M2MENC(h264, "H.264", AV_CODEC_ID_H264);
- M2MENC(hevc, "HEVC", AV_CODEC_ID_HEVC);
- M2MENC(vp8, "VP8", AV_CODEC_ID_VP8);
|