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/* |
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* V4L2 buffer helper functions. |
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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 <sys/mman.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <poll.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 "v4l2_context.h" |
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#include "v4l2_buffers.h" |
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#include "v4l2_m2m.h" |
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#define USEC_PER_SEC 1000000 |
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static AVRational v4l2_timebase = { 1, USEC_PER_SEC }; |
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static inline V4L2m2mContext *buf_to_m2mctx(V4L2Buffer *buf) |
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{ |
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return V4L2_TYPE_IS_OUTPUT(buf->context->type) ? |
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container_of(buf->context, V4L2m2mContext, output) : |
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container_of(buf->context, V4L2m2mContext, capture); |
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} |
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static inline AVCodecContext *logger(V4L2Buffer *buf) |
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{ |
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return buf_to_m2mctx(buf)->avctx; |
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} |
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static inline AVRational v4l2_get_timebase(V4L2Buffer *avbuf) |
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{ |
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V4L2m2mContext *s = buf_to_m2mctx(avbuf); |
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if (s->avctx->pkt_timebase.num) |
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return s->avctx->pkt_timebase; |
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return s->avctx->time_base; |
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} |
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static inline void v4l2_set_pts(V4L2Buffer *out, int64_t pts) |
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{ |
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int64_t v4l2_pts; |
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if (pts == AV_NOPTS_VALUE) |
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pts = 0; |
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/* convert pts to v4l2 timebase */ |
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v4l2_pts = av_rescale_q(pts, v4l2_get_timebase(out), v4l2_timebase); |
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out->buf.timestamp.tv_usec = v4l2_pts % USEC_PER_SEC; |
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out->buf.timestamp.tv_sec = v4l2_pts / USEC_PER_SEC; |
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} |
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static inline int64_t v4l2_get_pts(V4L2Buffer *avbuf) |
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{ |
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int64_t v4l2_pts; |
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/* convert pts back to encoder timebase */ |
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v4l2_pts = (int64_t)avbuf->buf.timestamp.tv_sec * USEC_PER_SEC + |
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avbuf->buf.timestamp.tv_usec; |
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return av_rescale_q(v4l2_pts, v4l2_timebase, v4l2_get_timebase(avbuf)); |
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} |
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static enum AVColorPrimaries v4l2_get_color_primaries(V4L2Buffer *buf) |
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{ |
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enum v4l2_ycbcr_encoding ycbcr; |
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enum v4l2_colorspace cs; |
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cs = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
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buf->context->format.fmt.pix_mp.colorspace : |
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buf->context->format.fmt.pix.colorspace; |
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ycbcr = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
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buf->context->format.fmt.pix_mp.ycbcr_enc: |
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buf->context->format.fmt.pix.ycbcr_enc; |
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switch(ycbcr) { |
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case V4L2_YCBCR_ENC_XV709: |
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case V4L2_YCBCR_ENC_709: return AVCOL_PRI_BT709; |
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case V4L2_YCBCR_ENC_XV601: |
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case V4L2_YCBCR_ENC_601:return AVCOL_PRI_BT470M; |
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default: |
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break; |
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} |
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switch(cs) { |
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case V4L2_COLORSPACE_470_SYSTEM_BG: return AVCOL_PRI_BT470BG; |
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case V4L2_COLORSPACE_SMPTE170M: return AVCOL_PRI_SMPTE170M; |
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case V4L2_COLORSPACE_SMPTE240M: return AVCOL_PRI_SMPTE240M; |
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case V4L2_COLORSPACE_BT2020: return AVCOL_PRI_BT2020; |
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default: |
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break; |
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} |
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return AVCOL_PRI_UNSPECIFIED; |
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} |
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static enum AVColorRange v4l2_get_color_range(V4L2Buffer *buf) |
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{ |
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enum v4l2_quantization qt; |
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qt = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
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buf->context->format.fmt.pix_mp.quantization : |
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buf->context->format.fmt.pix.quantization; |
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switch (qt) { |
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case V4L2_QUANTIZATION_LIM_RANGE: return AVCOL_RANGE_MPEG; |
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case V4L2_QUANTIZATION_FULL_RANGE: return AVCOL_RANGE_JPEG; |
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default: |
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break; |
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} |
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return AVCOL_RANGE_UNSPECIFIED; |
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} |
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static enum AVColorSpace v4l2_get_color_space(V4L2Buffer *buf) |
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{ |
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enum v4l2_ycbcr_encoding ycbcr; |
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enum v4l2_colorspace cs; |
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cs = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
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buf->context->format.fmt.pix_mp.colorspace : |
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buf->context->format.fmt.pix.colorspace; |
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ycbcr = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
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buf->context->format.fmt.pix_mp.ycbcr_enc: |
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buf->context->format.fmt.pix.ycbcr_enc; |
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switch(cs) { |
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case V4L2_COLORSPACE_SRGB: return AVCOL_SPC_RGB; |
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case V4L2_COLORSPACE_REC709: return AVCOL_SPC_BT709; |
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case V4L2_COLORSPACE_470_SYSTEM_M: return AVCOL_SPC_FCC; |
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case V4L2_COLORSPACE_470_SYSTEM_BG: return AVCOL_SPC_BT470BG; |
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case V4L2_COLORSPACE_SMPTE170M: return AVCOL_SPC_SMPTE170M; |
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case V4L2_COLORSPACE_SMPTE240M: return AVCOL_SPC_SMPTE240M; |
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case V4L2_COLORSPACE_BT2020: |
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if (ycbcr == V4L2_YCBCR_ENC_BT2020_CONST_LUM) |
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return AVCOL_SPC_BT2020_CL; |
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else |
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return AVCOL_SPC_BT2020_NCL; |
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default: |
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break; |
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} |
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return AVCOL_SPC_UNSPECIFIED; |
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} |
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static enum AVColorTransferCharacteristic v4l2_get_color_trc(V4L2Buffer *buf) |
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{ |
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enum v4l2_ycbcr_encoding ycbcr; |
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enum v4l2_xfer_func xfer; |
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enum v4l2_colorspace cs; |
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cs = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
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buf->context->format.fmt.pix_mp.colorspace : |
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buf->context->format.fmt.pix.colorspace; |
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ycbcr = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
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buf->context->format.fmt.pix_mp.ycbcr_enc: |
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buf->context->format.fmt.pix.ycbcr_enc; |
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xfer = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
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buf->context->format.fmt.pix_mp.xfer_func: |
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buf->context->format.fmt.pix.xfer_func; |
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switch (xfer) { |
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case V4L2_XFER_FUNC_709: return AVCOL_TRC_BT709; |
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case V4L2_XFER_FUNC_SRGB: return AVCOL_TRC_IEC61966_2_1; |
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default: |
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break; |
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} |
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switch (cs) { |
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case V4L2_COLORSPACE_470_SYSTEM_M: return AVCOL_TRC_GAMMA22; |
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case V4L2_COLORSPACE_470_SYSTEM_BG: return AVCOL_TRC_GAMMA28; |
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case V4L2_COLORSPACE_SMPTE170M: return AVCOL_TRC_SMPTE170M; |
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case V4L2_COLORSPACE_SMPTE240M: return AVCOL_TRC_SMPTE240M; |
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default: |
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break; |
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} |
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switch (ycbcr) { |
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case V4L2_YCBCR_ENC_XV709: |
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case V4L2_YCBCR_ENC_XV601: return AVCOL_TRC_BT1361_ECG; |
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default: |
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break; |
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} |
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return AVCOL_TRC_UNSPECIFIED; |
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} |
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static void v4l2_free_buffer(void *opaque, uint8_t *unused) |
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{ |
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V4L2Buffer* avbuf = opaque; |
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V4L2m2mContext *s = buf_to_m2mctx(avbuf); |
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if (atomic_fetch_sub(&avbuf->context_refcount, 1) == 1) { |
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atomic_fetch_sub_explicit(&s->refcount, 1, memory_order_acq_rel); |
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if (s->reinit) { |
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if (!atomic_load(&s->refcount)) |
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sem_post(&s->refsync); |
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} else { |
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if (s->draining && V4L2_TYPE_IS_OUTPUT(avbuf->context->type)) { |
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/* no need to queue more buffers to the driver */ |
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avbuf->status = V4L2BUF_AVAILABLE; |
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} |
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else if (avbuf->context->streamon) |
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ff_v4l2_buffer_enqueue(avbuf); |
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} |
232 |
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233 |
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av_buffer_unref(&avbuf->context_ref); |
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} |
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} |
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static int v4l2_buf_increase_ref(V4L2Buffer *in) |
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{ |
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V4L2m2mContext *s = buf_to_m2mctx(in); |
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241 |
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if (in->context_ref) |
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atomic_fetch_add(&in->context_refcount, 1); |
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else { |
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in->context_ref = av_buffer_ref(s->self_ref); |
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if (!in->context_ref) |
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return AVERROR(ENOMEM); |
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248 |
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in->context_refcount = 1; |
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} |
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in->status = V4L2BUF_RET_USER; |
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atomic_fetch_add_explicit(&s->refcount, 1, memory_order_relaxed); |
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return 0; |
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} |
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257 |
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static int v4l2_buf_to_bufref(V4L2Buffer *in, int plane, AVBufferRef **buf) |
258 |
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{ |
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int ret; |
260 |
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261 |
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if (plane >= in->num_planes) |
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return AVERROR(EINVAL); |
263 |
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264 |
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/* even though most encoders return 0 in data_offset encoding vp8 does require this value */ |
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*buf = av_buffer_create((char *)in->plane_info[plane].mm_addr + in->planes[plane].data_offset, |
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in->plane_info[plane].length, v4l2_free_buffer, in, 0); |
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if (!*buf) |
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return AVERROR(ENOMEM); |
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270 |
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ret = v4l2_buf_increase_ref(in); |
271 |
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if (ret) |
272 |
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av_buffer_unref(buf); |
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274 |
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return ret; |
275 |
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} |
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static int v4l2_bufref_to_buf(V4L2Buffer *out, int plane, const uint8_t* data, int size, int offset) |
278 |
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{ |
279 |
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unsigned int bytesused, length; |
280 |
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281 |
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if (plane >= out->num_planes) |
282 |
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return AVERROR(EINVAL); |
283 |
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284 |
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length = out->plane_info[plane].length; |
285 |
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bytesused = FFMIN(size+offset, length); |
286 |
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287 |
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memcpy((uint8_t*)out->plane_info[plane].mm_addr+offset, data, FFMIN(size, length-offset)); |
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289 |
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if (V4L2_TYPE_IS_MULTIPLANAR(out->buf.type)) { |
290 |
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out->planes[plane].bytesused = bytesused; |
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out->planes[plane].length = length; |
292 |
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} else { |
293 |
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out->buf.bytesused = bytesused; |
294 |
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out->buf.length = length; |
295 |
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} |
296 |
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297 |
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return 0; |
298 |
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} |
299 |
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300 |
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static int v4l2_buffer_buf_to_swframe(AVFrame *frame, V4L2Buffer *avbuf) |
301 |
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{ |
302 |
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int i, ret; |
303 |
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304 |
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frame->format = avbuf->context->av_pix_fmt; |
305 |
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306 |
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for (i = 0; i < avbuf->num_planes; i++) { |
307 |
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ret = v4l2_buf_to_bufref(avbuf, i, &frame->buf[i]); |
308 |
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if (ret) |
309 |
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return ret; |
310 |
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311 |
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frame->linesize[i] = avbuf->plane_info[i].bytesperline; |
312 |
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frame->data[i] = frame->buf[i]->data; |
313 |
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} |
314 |
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315 |
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/* fixup special cases */ |
316 |
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switch (avbuf->context->av_pix_fmt) { |
317 |
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case AV_PIX_FMT_NV12: |
318 |
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case AV_PIX_FMT_NV21: |
319 |
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if (avbuf->num_planes > 1) |
320 |
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break; |
321 |
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frame->linesize[1] = avbuf->plane_info[0].bytesperline; |
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frame->data[1] = frame->buf[0]->data + avbuf->plane_info[0].bytesperline * avbuf->context->format.fmt.pix_mp.height; |
323 |
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break; |
324 |
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325 |
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case AV_PIX_FMT_YUV420P: |
326 |
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if (avbuf->num_planes > 1) |
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break; |
328 |
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frame->linesize[1] = avbuf->plane_info[0].bytesperline >> 1; |
329 |
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frame->linesize[2] = avbuf->plane_info[0].bytesperline >> 1; |
330 |
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frame->data[1] = frame->buf[0]->data + avbuf->plane_info[0].bytesperline * avbuf->context->format.fmt.pix_mp.height; |
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frame->data[2] = frame->data[1] + ((avbuf->plane_info[0].bytesperline * avbuf->context->format.fmt.pix_mp.height) >> 2); |
332 |
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break; |
333 |
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334 |
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default: |
335 |
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break; |
336 |
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} |
337 |
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338 |
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return 0; |
339 |
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} |
340 |
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341 |
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static int v4l2_buffer_swframe_to_buf(const AVFrame *frame, V4L2Buffer *out) |
342 |
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{ |
343 |
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int i, ret; |
344 |
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struct v4l2_format fmt = out->context->format; |
345 |
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int pixel_format = V4L2_TYPE_IS_MULTIPLANAR(fmt.type) ? |
346 |
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fmt.fmt.pix_mp.pixelformat : fmt.fmt.pix.pixelformat; |
347 |
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int height = V4L2_TYPE_IS_MULTIPLANAR(fmt.type) ? |
348 |
|
|
fmt.fmt.pix_mp.height : fmt.fmt.pix.height; |
349 |
|
|
int is_planar_format = 0; |
350 |
|
|
|
351 |
|
|
switch (pixel_format) { |
352 |
|
|
case V4L2_PIX_FMT_YUV420M: |
353 |
|
|
case V4L2_PIX_FMT_YVU420M: |
354 |
|
|
#ifdef V4L2_PIX_FMT_YUV422M |
355 |
|
|
case V4L2_PIX_FMT_YUV422M: |
356 |
|
|
#endif |
357 |
|
|
#ifdef V4L2_PIX_FMT_YVU422M |
358 |
|
|
case V4L2_PIX_FMT_YVU422M: |
359 |
|
|
#endif |
360 |
|
|
#ifdef V4L2_PIX_FMT_YUV444M |
361 |
|
|
case V4L2_PIX_FMT_YUV444M: |
362 |
|
|
#endif |
363 |
|
|
#ifdef V4L2_PIX_FMT_YVU444M |
364 |
|
|
case V4L2_PIX_FMT_YVU444M: |
365 |
|
|
#endif |
366 |
|
|
case V4L2_PIX_FMT_NV12M: |
367 |
|
|
case V4L2_PIX_FMT_NV21M: |
368 |
|
|
case V4L2_PIX_FMT_NV12MT_16X16: |
369 |
|
|
case V4L2_PIX_FMT_NV12MT: |
370 |
|
|
case V4L2_PIX_FMT_NV16M: |
371 |
|
|
case V4L2_PIX_FMT_NV61M: |
372 |
|
|
is_planar_format = 1; |
373 |
|
|
} |
374 |
|
|
|
375 |
|
|
if (!is_planar_format) { |
376 |
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format); |
377 |
|
|
int planes_nb = 0; |
378 |
|
|
int offset = 0; |
379 |
|
|
|
380 |
|
|
for (i = 0; i < desc->nb_components; i++) |
381 |
|
|
planes_nb = FFMAX(planes_nb, desc->comp[i].plane + 1); |
382 |
|
|
|
383 |
|
|
for (i = 0; i < planes_nb; i++) { |
384 |
|
|
int size, h = height; |
385 |
|
|
if (i == 1 || i == 2) { |
386 |
|
|
h = AV_CEIL_RSHIFT(h, desc->log2_chroma_h); |
387 |
|
|
} |
388 |
|
|
size = frame->linesize[i] * h; |
389 |
|
|
ret = v4l2_bufref_to_buf(out, 0, frame->data[i], size, offset); |
390 |
|
|
if (ret) |
391 |
|
|
return ret; |
392 |
|
|
offset += size; |
393 |
|
|
} |
394 |
|
|
return 0; |
395 |
|
|
} |
396 |
|
|
|
397 |
|
|
for (i = 0; i < out->num_planes; i++) { |
398 |
|
|
ret = v4l2_bufref_to_buf(out, i, frame->buf[i]->data, frame->buf[i]->size, 0); |
399 |
|
|
if (ret) |
400 |
|
|
return ret; |
401 |
|
|
} |
402 |
|
|
|
403 |
|
|
return 0; |
404 |
|
|
} |
405 |
|
|
|
406 |
|
|
/****************************************************************************** |
407 |
|
|
* |
408 |
|
|
* V4L2Buffer interface |
409 |
|
|
* |
410 |
|
|
******************************************************************************/ |
411 |
|
|
|
412 |
|
|
int ff_v4l2_buffer_avframe_to_buf(const AVFrame *frame, V4L2Buffer *out) |
413 |
|
|
{ |
414 |
|
|
v4l2_set_pts(out, frame->pts); |
415 |
|
|
|
416 |
|
|
return v4l2_buffer_swframe_to_buf(frame, out); |
417 |
|
|
} |
418 |
|
|
|
419 |
|
|
int ff_v4l2_buffer_buf_to_avframe(AVFrame *frame, V4L2Buffer *avbuf) |
420 |
|
|
{ |
421 |
|
|
int ret; |
422 |
|
|
|
423 |
|
|
av_frame_unref(frame); |
424 |
|
|
|
425 |
|
|
/* 1. get references to the actual data */ |
426 |
|
|
ret = v4l2_buffer_buf_to_swframe(frame, avbuf); |
427 |
|
|
if (ret) |
428 |
|
|
return ret; |
429 |
|
|
|
430 |
|
|
/* 2. get frame information */ |
431 |
|
|
frame->key_frame = !!(avbuf->buf.flags & V4L2_BUF_FLAG_KEYFRAME); |
432 |
|
|
frame->color_primaries = v4l2_get_color_primaries(avbuf); |
433 |
|
|
frame->colorspace = v4l2_get_color_space(avbuf); |
434 |
|
|
frame->color_range = v4l2_get_color_range(avbuf); |
435 |
|
|
frame->color_trc = v4l2_get_color_trc(avbuf); |
436 |
|
|
frame->pts = v4l2_get_pts(avbuf); |
437 |
|
|
frame->pkt_dts = AV_NOPTS_VALUE; |
438 |
|
|
|
439 |
|
|
/* these values are updated also during re-init in v4l2_process_driver_event */ |
440 |
|
|
frame->height = avbuf->context->height; |
441 |
|
|
frame->width = avbuf->context->width; |
442 |
|
|
frame->sample_aspect_ratio = avbuf->context->sample_aspect_ratio; |
443 |
|
|
|
444 |
|
|
/* 3. report errors upstream */ |
445 |
|
|
if (avbuf->buf.flags & V4L2_BUF_FLAG_ERROR) { |
446 |
|
|
av_log(logger(avbuf), AV_LOG_ERROR, "%s: driver decode error\n", avbuf->context->name); |
447 |
|
|
frame->decode_error_flags |= FF_DECODE_ERROR_INVALID_BITSTREAM; |
448 |
|
|
} |
449 |
|
|
|
450 |
|
|
return 0; |
451 |
|
|
} |
452 |
|
|
|
453 |
|
|
int ff_v4l2_buffer_buf_to_avpkt(AVPacket *pkt, V4L2Buffer *avbuf) |
454 |
|
|
{ |
455 |
|
|
int ret; |
456 |
|
|
|
457 |
|
|
av_packet_unref(pkt); |
458 |
|
|
ret = v4l2_buf_to_bufref(avbuf, 0, &pkt->buf); |
459 |
|
|
if (ret) |
460 |
|
|
return ret; |
461 |
|
|
|
462 |
|
|
pkt->size = V4L2_TYPE_IS_MULTIPLANAR(avbuf->buf.type) ? avbuf->buf.m.planes[0].bytesused : avbuf->buf.bytesused; |
463 |
|
|
pkt->data = pkt->buf->data; |
464 |
|
|
|
465 |
|
|
if (avbuf->buf.flags & V4L2_BUF_FLAG_KEYFRAME) |
466 |
|
|
pkt->flags |= AV_PKT_FLAG_KEY; |
467 |
|
|
|
468 |
|
|
if (avbuf->buf.flags & V4L2_BUF_FLAG_ERROR) { |
469 |
|
|
av_log(logger(avbuf), AV_LOG_ERROR, "%s driver encode error\n", avbuf->context->name); |
470 |
|
|
pkt->flags |= AV_PKT_FLAG_CORRUPT; |
471 |
|
|
} |
472 |
|
|
|
473 |
|
|
pkt->dts = pkt->pts = v4l2_get_pts(avbuf); |
474 |
|
|
|
475 |
|
|
return 0; |
476 |
|
|
} |
477 |
|
|
|
478 |
|
|
int ff_v4l2_buffer_avpkt_to_buf(const AVPacket *pkt, V4L2Buffer *out) |
479 |
|
|
{ |
480 |
|
|
int ret; |
481 |
|
|
|
482 |
|
|
ret = v4l2_bufref_to_buf(out, 0, pkt->data, pkt->size, 0); |
483 |
|
|
if (ret) |
484 |
|
|
return ret; |
485 |
|
|
|
486 |
|
|
v4l2_set_pts(out, pkt->pts); |
487 |
|
|
|
488 |
|
|
if (pkt->flags & AV_PKT_FLAG_KEY) |
489 |
|
|
out->flags = V4L2_BUF_FLAG_KEYFRAME; |
490 |
|
|
|
491 |
|
|
return 0; |
492 |
|
|
} |
493 |
|
|
|
494 |
|
|
int ff_v4l2_buffer_initialize(V4L2Buffer* avbuf, int index) |
495 |
|
|
{ |
496 |
|
|
V4L2Context *ctx = avbuf->context; |
497 |
|
|
int ret, i; |
498 |
|
|
|
499 |
|
|
avbuf->buf.memory = V4L2_MEMORY_MMAP; |
500 |
|
|
avbuf->buf.type = ctx->type; |
501 |
|
|
avbuf->buf.index = index; |
502 |
|
|
|
503 |
|
|
if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { |
504 |
|
|
avbuf->buf.length = VIDEO_MAX_PLANES; |
505 |
|
|
avbuf->buf.m.planes = avbuf->planes; |
506 |
|
|
} |
507 |
|
|
|
508 |
|
|
ret = ioctl(buf_to_m2mctx(avbuf)->fd, VIDIOC_QUERYBUF, &avbuf->buf); |
509 |
|
|
if (ret < 0) |
510 |
|
|
return AVERROR(errno); |
511 |
|
|
|
512 |
|
|
if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { |
513 |
|
|
avbuf->num_planes = 0; |
514 |
|
|
/* in MP, the V4L2 API states that buf.length means num_planes */ |
515 |
|
|
for (i = 0; i < avbuf->buf.length; i++) { |
516 |
|
|
if (avbuf->buf.m.planes[i].length) |
517 |
|
|
avbuf->num_planes++; |
518 |
|
|
} |
519 |
|
|
} else |
520 |
|
|
avbuf->num_planes = 1; |
521 |
|
|
|
522 |
|
|
for (i = 0; i < avbuf->num_planes; i++) { |
523 |
|
|
|
524 |
|
|
avbuf->plane_info[i].bytesperline = V4L2_TYPE_IS_MULTIPLANAR(ctx->type) ? |
525 |
|
|
ctx->format.fmt.pix_mp.plane_fmt[i].bytesperline : |
526 |
|
|
ctx->format.fmt.pix.bytesperline; |
527 |
|
|
|
528 |
|
|
if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { |
529 |
|
|
avbuf->plane_info[i].length = avbuf->buf.m.planes[i].length; |
530 |
|
|
avbuf->plane_info[i].mm_addr = mmap(NULL, avbuf->buf.m.planes[i].length, |
531 |
|
|
PROT_READ | PROT_WRITE, MAP_SHARED, |
532 |
|
|
buf_to_m2mctx(avbuf)->fd, avbuf->buf.m.planes[i].m.mem_offset); |
533 |
|
|
} else { |
534 |
|
|
avbuf->plane_info[i].length = avbuf->buf.length; |
535 |
|
|
avbuf->plane_info[i].mm_addr = mmap(NULL, avbuf->buf.length, |
536 |
|
|
PROT_READ | PROT_WRITE, MAP_SHARED, |
537 |
|
|
buf_to_m2mctx(avbuf)->fd, avbuf->buf.m.offset); |
538 |
|
|
} |
539 |
|
|
|
540 |
|
|
if (avbuf->plane_info[i].mm_addr == MAP_FAILED) |
541 |
|
|
return AVERROR(ENOMEM); |
542 |
|
|
} |
543 |
|
|
|
544 |
|
|
avbuf->status = V4L2BUF_AVAILABLE; |
545 |
|
|
|
546 |
|
|
if (V4L2_TYPE_IS_OUTPUT(ctx->type)) |
547 |
|
|
return 0; |
548 |
|
|
|
549 |
|
|
if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { |
550 |
|
|
avbuf->buf.m.planes = avbuf->planes; |
551 |
|
|
avbuf->buf.length = avbuf->num_planes; |
552 |
|
|
|
553 |
|
|
} else { |
554 |
|
|
avbuf->buf.bytesused = avbuf->planes[0].bytesused; |
555 |
|
|
avbuf->buf.length = avbuf->planes[0].length; |
556 |
|
|
} |
557 |
|
|
|
558 |
|
|
return ff_v4l2_buffer_enqueue(avbuf); |
559 |
|
|
} |
560 |
|
|
|
561 |
|
|
int ff_v4l2_buffer_enqueue(V4L2Buffer* avbuf) |
562 |
|
|
{ |
563 |
|
|
int ret; |
564 |
|
|
|
565 |
|
|
avbuf->buf.flags = avbuf->flags; |
566 |
|
|
|
567 |
|
|
ret = ioctl(buf_to_m2mctx(avbuf)->fd, VIDIOC_QBUF, &avbuf->buf); |
568 |
|
|
if (ret < 0) |
569 |
|
|
return AVERROR(errno); |
570 |
|
|
|
571 |
|
|
avbuf->status = V4L2BUF_IN_DRIVER; |
572 |
|
|
|
573 |
|
|
return 0; |
574 |
|
|
} |