/* Spa * Copyright (C) 2017 Wim Taymans * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ #include #include #include #include #include #include #include #include static void v4l2_on_fd_events(struct spa_source *source); static int xioctl(int fd, int request, void *arg) { int err; do { err = ioctl(fd, request, arg); } while (err == -1 && errno == EINTR); return err; } static int spa_v4l2_open(struct impl *this) { struct port *state = &this->out_ports[0]; struct stat st; struct props *props = &this->props; if (state->opened) return 0; if (props->device[0] == '\0') { spa_log_error(state->log, "v4l2: Device property not set"); return -1; } spa_log_info(state->log, "v4l2: Playback device is '%s'", props->device); if (stat(props->device, &st) < 0) { spa_log_error(state->log, "v4l2: Cannot identify '%s': %d, %s", props->device, errno, strerror(errno)); return -1; } if (!S_ISCHR(st.st_mode)) { spa_log_error(state->log, "v4l2: %s is no device", props->device); return -1; } state->fd = open(props->device, O_RDWR | O_NONBLOCK, 0); if (state->fd == -1) { spa_log_error(state->log, "v4l2: Cannot open '%s': %d, %s", props->device, errno, strerror(errno)); return -1; } if (xioctl(state->fd, VIDIOC_QUERYCAP, &state->cap) < 0) { perror("QUERYCAP"); return -1; } if ((state->cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0) { spa_log_error(state->log, "v4l2: %s is no video capture device", props->device); return -1; } state->source.func = v4l2_on_fd_events; state->source.data = this; state->source.fd = state->fd; state->source.mask = SPA_IO_IN | SPA_IO_ERR; state->source.rmask = 0; state->opened = true; return 0; } static int spa_v4l2_buffer_recycle(struct impl *this, uint32_t buffer_id) { struct port *state = &this->out_ports[0]; struct buffer *b = &state->buffers[buffer_id]; if (!b->outstanding) return SPA_RESULT_OK; b->outstanding = false; spa_log_trace(state->log, "v4l2 %p: recycle buffer %d", this, buffer_id); if (xioctl(state->fd, VIDIOC_QBUF, &b->v4l2_buffer) < 0) { perror("VIDIOC_QBUF"); } return SPA_RESULT_OK; } static int spa_v4l2_clear_buffers(struct impl *this) { struct port *state = &this->out_ports[0]; struct v4l2_requestbuffers reqbuf; int i; if (state->n_buffers == 0) return SPA_RESULT_OK; for (i = 0; i < state->n_buffers; i++) { struct buffer *b; b = &state->buffers[i]; if (b->outstanding) { spa_log_info(state->log, "v4l2: queueing outstanding buffer %p", b); spa_v4l2_buffer_recycle(this, i); } if (b->allocated) { if (b->outbuf->datas[0].data) munmap(b->outbuf->datas[0].data, b->outbuf->datas[0].maxsize); if (b->outbuf->datas[0].fd != -1) close(b->outbuf->datas[0].fd); b->outbuf->datas[0].type = SPA_ID_INVALID; } } spa_zero(reqbuf); reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; reqbuf.memory = state->memtype; reqbuf.count = 0; if (xioctl(state->fd, VIDIOC_REQBUFS, &reqbuf) < 0) { perror("VIDIOC_REQBUFS"); } state->n_buffers = 0; return SPA_RESULT_OK; } static int spa_v4l2_port_set_enabled(struct impl *this, bool enabled) { struct port *state = &this->out_ports[0]; if (state->source_enabled != enabled) { spa_log_info(state->log, "v4l2: enabled %d", enabled); state->source_enabled = enabled; if (enabled) spa_loop_add_source(state->data_loop, &state->source); else spa_loop_remove_source(state->data_loop, &state->source); } return SPA_RESULT_OK; } static int spa_v4l2_close(struct impl *this) { struct port *state = &this->out_ports[0]; if (!state->opened) return 0; if (state->n_buffers > 0) return 0; spa_v4l2_port_set_enabled(this, false); spa_log_info(state->log, "v4l2: close"); if (close(state->fd)) perror("close"); state->fd = -1; state->opened = false; return 0; } struct format_info { uint32_t fourcc; off_t format_offset; off_t media_type_offset; off_t media_subtype_offset; }; #define VIDEO offsetof(struct type, media_type.video) #define IMAGE offsetof(struct type, media_type.image) #define RAW offsetof(struct type, media_subtype.raw) #define BAYER offsetof(struct type, media_subtype_video.bayer) #define MJPG offsetof(struct type, media_subtype_video.mjpg) #define JPEG offsetof(struct type, media_subtype_video.jpeg) #define DV offsetof(struct type, media_subtype_video.dv) #define MPEGTS offsetof(struct type, media_subtype_video.mpegts) #define H264 offsetof(struct type, media_subtype_video.h264) #define H263 offsetof(struct type, media_subtype_video.h263) #define MPEG1 offsetof(struct type, media_subtype_video.mpeg1) #define MPEG2 offsetof(struct type, media_subtype_video.mpeg2) #define MPEG4 offsetof(struct type, media_subtype_video.mpeg4) #define XVID offsetof(struct type, media_subtype_video.xvid) #define VC1 offsetof(struct type, media_subtype_video.vc1) #define VP8 offsetof(struct type, media_subtype_video.vp8) #define FORMAT_UNKNOWN offsetof(struct type, video_format.UNKNOWN) #define FORMAT_ENCODED offsetof(struct type, video_format.ENCODED) #define FORMAT_RGB15 offsetof(struct type, video_format.RGB15) #define FORMAT_BGR15 offsetof(struct type, video_format.BGR15) #define FORMAT_RGB16 offsetof(struct type, video_format.RGB16) #define FORMAT_BGR offsetof(struct type, video_format.BGR) #define FORMAT_RGB offsetof(struct type, video_format.RGB) #define FORMAT_BGRA offsetof(struct type, video_format.BGRA) #define FORMAT_BGRx offsetof(struct type, video_format.BGRx) #define FORMAT_ARGB offsetof(struct type, video_format.ARGB) #define FORMAT_xRGB offsetof(struct type, video_format.xRGB) #define FORMAT_GRAY8 offsetof(struct type, video_format.GRAY8) #define FORMAT_GRAY16_LE offsetof(struct type, video_format.GRAY16_LE) #define FORMAT_GRAY16_BE offsetof(struct type, video_format.GRAY16_BE) #define FORMAT_YVU9 offsetof(struct type, video_format.YVU9) #define FORMAT_YV12 offsetof(struct type, video_format.YV12) #define FORMAT_YUY2 offsetof(struct type, video_format.YUY2) #define FORMAT_YVYU offsetof(struct type, video_format.YVYU) #define FORMAT_UYVY offsetof(struct type, video_format.UYVY) #define FORMAT_Y42B offsetof(struct type, video_format.Y42B) #define FORMAT_Y41B offsetof(struct type, video_format.Y41B) #define FORMAT_YUV9 offsetof(struct type, video_format.YUV9) #define FORMAT_I420 offsetof(struct type, video_format.I420) #define FORMAT_NV12 offsetof(struct type, video_format.NV12) #define FORMAT_NV12_64Z32 offsetof(struct type, video_format.NV12_64Z32) #define FORMAT_NV21 offsetof(struct type, video_format.NV21) #define FORMAT_NV16 offsetof(struct type, video_format.NV16) #define FORMAT_NV61 offsetof(struct type, video_format.NV61) #define FORMAT_NV24 offsetof(struct type, video_format.NV24) static const struct format_info format_info[] = { /* RGB formats */ {V4L2_PIX_FMT_RGB332, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_ARGB555, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_XRGB555, FORMAT_RGB15, VIDEO, RAW}, {V4L2_PIX_FMT_ARGB555X, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_XRGB555X, FORMAT_BGR15, VIDEO, RAW}, {V4L2_PIX_FMT_RGB565, FORMAT_RGB16, VIDEO, RAW}, {V4L2_PIX_FMT_RGB565X, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_BGR666, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_BGR24, FORMAT_BGR, VIDEO, RAW}, {V4L2_PIX_FMT_RGB24, FORMAT_RGB, VIDEO, RAW}, {V4L2_PIX_FMT_ABGR32, FORMAT_BGRA, VIDEO, RAW}, {V4L2_PIX_FMT_XBGR32, FORMAT_BGRx, VIDEO, RAW}, {V4L2_PIX_FMT_ARGB32, FORMAT_ARGB, VIDEO, RAW}, {V4L2_PIX_FMT_XRGB32, FORMAT_xRGB, VIDEO, RAW}, /* Deprecated Packed RGB Image Formats (alpha ambiguity) */ {V4L2_PIX_FMT_RGB444, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_RGB555, FORMAT_RGB15, VIDEO, RAW}, {V4L2_PIX_FMT_RGB555X, FORMAT_BGR15, VIDEO, RAW}, {V4L2_PIX_FMT_BGR32, FORMAT_BGRx, VIDEO, RAW}, {V4L2_PIX_FMT_RGB32, FORMAT_xRGB, VIDEO, RAW}, /* Grey formats */ {V4L2_PIX_FMT_GREY, FORMAT_GRAY8, VIDEO, RAW}, {V4L2_PIX_FMT_Y4, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_Y6, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_Y10, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_Y12, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_Y16, FORMAT_GRAY16_LE, VIDEO, RAW}, {V4L2_PIX_FMT_Y16_BE, FORMAT_GRAY16_BE, VIDEO, RAW}, {V4L2_PIX_FMT_Y10BPACK, FORMAT_UNKNOWN, VIDEO, RAW}, /* Palette formats */ {V4L2_PIX_FMT_PAL8, FORMAT_UNKNOWN, VIDEO, RAW}, /* Chrominance formats */ {V4L2_PIX_FMT_UV8, FORMAT_UNKNOWN, VIDEO, RAW}, /* Luminance+Chrominance formats */ {V4L2_PIX_FMT_YVU410, FORMAT_YVU9, VIDEO, RAW}, {V4L2_PIX_FMT_YVU420, FORMAT_YV12, VIDEO, RAW}, {V4L2_PIX_FMT_YVU420M, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_YUYV, FORMAT_YUY2, VIDEO, RAW}, {V4L2_PIX_FMT_YYUV, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_YVYU, FORMAT_YVYU, VIDEO, RAW}, {V4L2_PIX_FMT_UYVY, FORMAT_UYVY, VIDEO, RAW}, {V4L2_PIX_FMT_VYUY, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_YUV422P, FORMAT_Y42B, VIDEO, RAW}, {V4L2_PIX_FMT_YUV411P, FORMAT_Y41B, VIDEO, RAW}, {V4L2_PIX_FMT_Y41P, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_YUV444, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_YUV555, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_YUV565, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_YUV32, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_YUV410, FORMAT_YUV9, VIDEO, RAW}, {V4L2_PIX_FMT_YUV420, FORMAT_I420, VIDEO, RAW}, {V4L2_PIX_FMT_YUV420M, FORMAT_I420, VIDEO, RAW}, {V4L2_PIX_FMT_HI240, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_HM12, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_M420, FORMAT_UNKNOWN, VIDEO, RAW}, /* two planes -- one Y, one Cr + Cb interleaved */ {V4L2_PIX_FMT_NV12, FORMAT_NV12, VIDEO, RAW}, {V4L2_PIX_FMT_NV12M, FORMAT_NV12, VIDEO, RAW}, {V4L2_PIX_FMT_NV12MT, FORMAT_NV12_64Z32, VIDEO, RAW}, {V4L2_PIX_FMT_NV12MT_16X16, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_NV21, FORMAT_NV21, VIDEO, RAW}, {V4L2_PIX_FMT_NV21M, FORMAT_NV21, VIDEO, RAW}, {V4L2_PIX_FMT_NV16, FORMAT_NV16, VIDEO, RAW}, {V4L2_PIX_FMT_NV16M, FORMAT_NV16, VIDEO, RAW}, {V4L2_PIX_FMT_NV61, FORMAT_NV61, VIDEO, RAW}, {V4L2_PIX_FMT_NV61M, FORMAT_NV61, VIDEO, RAW}, {V4L2_PIX_FMT_NV24, FORMAT_NV24, VIDEO, RAW}, {V4L2_PIX_FMT_NV42, FORMAT_UNKNOWN, VIDEO, RAW}, /* Bayer formats - see http://www.siliconimaging.com/RGB%20Bayer.htm */ {V4L2_PIX_FMT_SBGGR8, FORMAT_UNKNOWN, VIDEO, BAYER}, {V4L2_PIX_FMT_SGBRG8, FORMAT_UNKNOWN, VIDEO, BAYER}, {V4L2_PIX_FMT_SGRBG8, FORMAT_UNKNOWN, VIDEO, BAYER}, {V4L2_PIX_FMT_SRGGB8, FORMAT_UNKNOWN, VIDEO, BAYER}, /* compressed formats */ {V4L2_PIX_FMT_MJPEG, FORMAT_ENCODED, VIDEO, MJPG}, {V4L2_PIX_FMT_JPEG, FORMAT_ENCODED, IMAGE, JPEG}, {V4L2_PIX_FMT_PJPG, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_DV, FORMAT_ENCODED, VIDEO, DV}, {V4L2_PIX_FMT_MPEG, FORMAT_ENCODED, VIDEO, MPEGTS}, {V4L2_PIX_FMT_H264, FORMAT_ENCODED, VIDEO, H264}, {V4L2_PIX_FMT_H264_NO_SC, FORMAT_ENCODED, VIDEO, H264}, {V4L2_PIX_FMT_H264_MVC, FORMAT_ENCODED, VIDEO, H264}, {V4L2_PIX_FMT_H263, FORMAT_ENCODED, VIDEO, H263}, {V4L2_PIX_FMT_MPEG1, FORMAT_ENCODED, VIDEO, MPEG1}, {V4L2_PIX_FMT_MPEG2, FORMAT_ENCODED, VIDEO, MPEG2}, {V4L2_PIX_FMT_MPEG4, FORMAT_ENCODED, VIDEO, MPEG4}, {V4L2_PIX_FMT_XVID, FORMAT_ENCODED, VIDEO, XVID}, {V4L2_PIX_FMT_VC1_ANNEX_G, FORMAT_ENCODED, VIDEO, VC1}, {V4L2_PIX_FMT_VC1_ANNEX_L, FORMAT_ENCODED, VIDEO, VC1}, {V4L2_PIX_FMT_VP8, FORMAT_ENCODED, VIDEO, VP8}, /* Vendor-specific formats */ {V4L2_PIX_FMT_WNVA, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_SN9C10X, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_PWC1, FORMAT_UNKNOWN, VIDEO, RAW}, {V4L2_PIX_FMT_PWC2, FORMAT_UNKNOWN, VIDEO, RAW}, }; static const struct format_info *fourcc_to_format_info(uint32_t fourcc) { int i; for (i = 0; i < SPA_N_ELEMENTS(format_info); i++) { if (format_info[i].fourcc == fourcc) return &format_info[i]; } return NULL; } #if 0 static const struct format_info *video_format_to_format_info(uint32_t format) { int i; for (i = 0; i < SPA_N_ELEMENTS(format_info); i++) { if (format_info[i].format == format) return &format_info[i]; } return NULL; } #endif static const struct format_info *find_format_info_by_media_type(struct type *types, uint32_t type, uint32_t subtype, uint32_t format, int startidx) { int i; for (i = startidx; i < SPA_N_ELEMENTS(format_info); i++) { uint32_t media_type, media_subtype, media_format; media_type = *SPA_MEMBER(types, format_info[i].media_type_offset, uint32_t); media_subtype = *SPA_MEMBER(types, format_info[i].media_subtype_offset, uint32_t); media_format = *SPA_MEMBER(types, format_info[i].format_offset, uint32_t); if ((media_type == type) && (media_subtype == subtype) && (format == 0 || media_format == format)) return &format_info[i]; } return NULL; } static uint32_t enum_filter_format(struct type *type, const struct spa_format *filter, uint32_t index) { uint32_t video_format = 0; if ((filter->body.media_type.value == type->media_type.video || filter->body.media_type.value == type->media_type.image)) { if (filter->body.media_subtype.value == type->media_subtype.raw) { struct spa_pod_prop *p; uint32_t n_values; const uint32_t *values; if (!(p = spa_format_find_prop(filter, type->format_video.format))) return type->video_format.UNKNOWN; if (p->body.value.type != SPA_POD_TYPE_ID) return type->video_format.UNKNOWN; values = SPA_POD_BODY_CONST(&p->body.value); n_values = SPA_POD_PROP_N_VALUES(p); if (p->body.flags & SPA_POD_PROP_FLAG_UNSET) { if (index + 1 < n_values) video_format = values[index + 1]; } else { if (index == 0) video_format = values[0]; } } else { if (index == 0) video_format = type->video_format.ENCODED; } } return video_format; } static bool filter_framesize(struct v4l2_frmsizeenum *frmsize, const struct spa_rectangle *min, const struct spa_rectangle *max, const struct spa_rectangle *step) { if (frmsize->type == V4L2_FRMSIZE_TYPE_DISCRETE) { if (frmsize->discrete.width < min->width || frmsize->discrete.height < min->height || frmsize->discrete.width > max->width || frmsize->discrete.height > max->height) { return false; } } else if (frmsize->type == V4L2_FRMSIZE_TYPE_CONTINUOUS || frmsize->type == V4L2_FRMSIZE_TYPE_STEPWISE) { /* FIXME, use LCM */ frmsize->stepwise.step_width *= step->width; frmsize->stepwise.step_height *= step->height; if (frmsize->stepwise.max_width < min->width || frmsize->stepwise.max_height < min->height || frmsize->stepwise.min_width > max->width || frmsize->stepwise.min_height > max->height) return false; frmsize->stepwise.min_width = SPA_MAX(frmsize->stepwise.min_width, min->width); frmsize->stepwise.min_height = SPA_MAX(frmsize->stepwise.min_height, min->height); frmsize->stepwise.max_width = SPA_MIN(frmsize->stepwise.max_width, max->width); frmsize->stepwise.max_height = SPA_MIN(frmsize->stepwise.max_height, max->height); } else return false; return true; } static int compare_fraction(struct v4l2_fract *f1, const struct spa_fraction *f2) { uint64_t n1, n2; /* fractions are reduced when set, so we can quickly see if they're equal */ if (f1->denominator == f2->num && f1->numerator == f2->denom) return 0; /* extend to 64 bits */ n1 = ((int64_t) f1->denominator) * f2->denom; n2 = ((int64_t) f1->numerator) * f2->num; if (n1 < n2) return -1; return 1; } static bool filter_framerate(struct v4l2_frmivalenum *frmival, const struct spa_fraction *min, const struct spa_fraction *max, const struct spa_fraction *step) { if (frmival->type == V4L2_FRMIVAL_TYPE_DISCRETE) { if (compare_fraction(&frmival->discrete, min) < 0 || compare_fraction(&frmival->discrete, max) > 0) return false; } else if (frmival->type == V4L2_FRMIVAL_TYPE_CONTINUOUS || frmival->type == V4L2_FRMIVAL_TYPE_STEPWISE) { /* FIXME, use LCM */ frmival->stepwise.step.denominator *= step->num; frmival->stepwise.step.numerator *= step->denom; if (compare_fraction(&frmival->stepwise.max, min) < 0 || compare_fraction(&frmival->stepwise.min, max) > 0) return false; if (compare_fraction(&frmival->stepwise.min, min) < 0) { frmival->stepwise.min.denominator = min->num; frmival->stepwise.min.numerator = min->denom; } if (compare_fraction(&frmival->stepwise.max, max) > 0) { frmival->stepwise.max.denominator = max->num; frmival->stepwise.max.numerator = max->denom; } } else return false; return true; } #define FOURCC_ARGS(f) (f)&0x7f,((f)>>8)&0x7f,((f)>>16)&0x7f,((f)>>24)&0x7f static int spa_v4l2_enum_format(struct impl *this, struct spa_format **format, const struct spa_format *filter, uint32_t index) { struct port *state = &this->out_ports[0]; int res, n_fractions; const struct format_info *info; struct spa_pod_frame f[2]; struct spa_pod_prop *prop; struct spa_pod_builder b = { NULL, }; uint32_t media_type, media_subtype, video_format; if (spa_v4l2_open(this) < 0) return SPA_RESULT_ERROR; *format = NULL; if (index == 0) { spa_zero(state->fmtdesc); state->fmtdesc.index = 0; state->fmtdesc.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; state->next_fmtdesc = true; spa_zero(state->frmsize); state->next_frmsize = true; spa_zero(state->frmival); } if (false) { next_fmtdesc: state->fmtdesc.index++; state->next_fmtdesc = true; } while (state->next_fmtdesc) { if (filter) { video_format = enum_filter_format(&this->type, filter, state->fmtdesc.index); if (video_format == this->type.video_format.UNKNOWN) return SPA_RESULT_ENUM_END; info = find_format_info_by_media_type(&this->type, filter->body.media_type.value, filter->body.media_subtype.value, video_format, 0); if (info == NULL) goto next_fmtdesc; state->fmtdesc.pixelformat = info->fourcc; } else { if ((res = xioctl(state->fd, VIDIOC_ENUM_FMT, &state->fmtdesc)) < 0) { if (errno != EINVAL) perror("VIDIOC_ENUM_FMT"); return SPA_RESULT_ENUM_END; } } state->next_fmtdesc = false; state->frmsize.index = 0; state->frmsize.pixel_format = state->fmtdesc.pixelformat; state->next_frmsize = true; } if (!(info = fourcc_to_format_info(state->fmtdesc.pixelformat))) goto next_fmtdesc; next_frmsize: while (state->next_frmsize) { if (filter) { struct spa_pod_prop *p; /* check if we have a fixed frame size */ if (!(p = spa_format_find_prop(filter, this->type.format_video.size))) goto do_frmsize; if (p->body.value.type != SPA_POD_TYPE_RECTANGLE) return SPA_RESULT_ENUM_END; if (!(p->body.flags & SPA_POD_PROP_FLAG_UNSET)) { const struct spa_rectangle *values = SPA_POD_BODY_CONST(&p->body.value); if (state->frmsize.index > 0) goto next_fmtdesc; state->frmsize.type = V4L2_FRMSIZE_TYPE_DISCRETE; state->frmsize.discrete.width = values[0].width; state->frmsize.discrete.height = values[0].height; goto have_size; } } do_frmsize: if ((res = xioctl(state->fd, VIDIOC_ENUM_FRAMESIZES, &state->frmsize)) < 0) { if (errno == EINVAL) goto next_fmtdesc; perror("VIDIOC_ENUM_FRAMESIZES"); return SPA_RESULT_ENUM_END; } if (filter) { struct spa_pod_prop *p; const struct spa_rectangle step = { 1, 1 }, *values; uint32_t range; uint32_t i, n_values; /* check if we have a fixed frame size */ if (!(p = spa_format_find_prop(filter, this->type.format_video.size))) goto have_size; range = p->body.flags & SPA_POD_PROP_RANGE_MASK; values = SPA_POD_BODY_CONST(&p->body.value); n_values = SPA_POD_PROP_N_VALUES(p); if (range == SPA_POD_PROP_RANGE_MIN_MAX && n_values > 2) { if (filter_framesize(&state->frmsize, &values[1], &values[2], &step)) goto have_size; } else if (range == SPA_POD_PROP_RANGE_STEP && n_values > 3) { if (filter_framesize(&state->frmsize, &values[1], &values[2], &values[3])) goto have_size; } else if (range == SPA_POD_PROP_RANGE_ENUM) { for (i = 1; i < n_values; i++) { if (filter_framesize(&state->frmsize, &values[i], &values[i], &step)) goto have_size; } } /* nothing matches the filter, get next frame size */ state->frmsize.index++; continue; } have_size: if (state->frmsize.type == V4L2_FRMSIZE_TYPE_DISCRETE) { /* we have a fixed size, use this to get the frame intervals */ state->frmival.index = 0; state->frmival.pixel_format = state->frmsize.pixel_format; state->frmival.width = state->frmsize.discrete.width; state->frmival.height = state->frmsize.discrete.height; state->next_frmsize = false; } else if (state->frmsize.type == V4L2_FRMSIZE_TYPE_CONTINUOUS || state->frmsize.type == V4L2_FRMSIZE_TYPE_STEPWISE) { /* we have a non fixed size, fix to something sensible to get the * framerate */ state->frmival.index = 0; state->frmival.pixel_format = state->frmsize.pixel_format; state->frmival.width = state->frmsize.stepwise.min_width; state->frmival.height = state->frmsize.stepwise.min_height; state->next_frmsize = false; } else { state->frmsize.index++; } } media_type = *SPA_MEMBER(&this->type, info->media_type_offset, uint32_t); media_subtype = *SPA_MEMBER(&this->type, info->media_subtype_offset, uint32_t); video_format = *SPA_MEMBER(&this->type, info->format_offset, uint32_t); spa_pod_builder_init(&b, state->format_buffer, sizeof(state->format_buffer)); spa_pod_builder_push_format(&b, &f[0], this->type.format, media_type, media_subtype); if (media_subtype == this->type.media_subtype.raw) { spa_pod_builder_add(&b, ":", this->type.format_video.format, "I", video_format, 0); } spa_pod_builder_add(&b, ":", this->type.format_video.size, "R", &SPA_RECTANGLE(state->frmsize.discrete.width, state->frmsize.discrete.height), 0); spa_pod_builder_push_prop(&b, &f[1], this->type.format_video.framerate, SPA_POD_PROP_RANGE_NONE | SPA_POD_PROP_FLAG_UNSET); prop = SPA_POD_BUILDER_DEREF(&b, f[1].ref, struct spa_pod_prop); n_fractions = 0; state->frmival.index = 0; while (true) { if ((res = xioctl(state->fd, VIDIOC_ENUM_FRAMEINTERVALS, &state->frmival)) < 0) { if (errno == EINVAL) { state->frmsize.index++; state->next_frmsize = true; if (state->frmival.index == 0) goto next_frmsize; break; } perror("VIDIOC_ENUM_FRAMEINTERVALS"); return SPA_RESULT_ENUM_END; } if (filter) { struct spa_pod_prop *p; uint32_t range; uint32_t i, n_values; const struct spa_fraction step = { 1, 1 }, *values; if (!(p = spa_format_find_prop(filter, this->type.format_video.framerate))) goto have_framerate; if (p->body.value.type != SPA_POD_TYPE_FRACTION) return SPA_RESULT_ENUM_END; range = p->body.flags & SPA_POD_PROP_RANGE_MASK; values = SPA_POD_BODY_CONST(&p->body.value); n_values = SPA_POD_PROP_N_VALUES(p); if (!(p->body.flags & SPA_POD_PROP_FLAG_UNSET)) { if (filter_framerate(&state->frmival, &values[0], &values[0], &step)) goto have_framerate; } else if (range == SPA_POD_PROP_RANGE_MIN_MAX && n_values > 2) { if (filter_framerate(&state->frmival, &values[1], &values[2], &step)) goto have_framerate; } else if (range == SPA_POD_PROP_RANGE_STEP && n_values > 3) { if (filter_framerate(&state->frmival, &values[1], &values[2], &values[3])) goto have_framerate; } else if (range == SPA_POD_PROP_RANGE_ENUM) { for (i = 1; i < n_values; i++) { if (filter_framerate(&state->frmival, &values[i], &values[i], &step)) goto have_framerate; } } state->frmival.index++; continue; } have_framerate: if (state->frmival.type == V4L2_FRMIVAL_TYPE_DISCRETE) { prop->body.flags |= SPA_POD_PROP_RANGE_ENUM; if (n_fractions == 0) spa_pod_builder_fraction(&b, state->frmival.discrete.denominator, state->frmival.discrete.numerator); spa_pod_builder_fraction(&b, state->frmival.discrete.denominator, state->frmival.discrete.numerator); state->frmival.index++; } else if (state->frmival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS || state->frmival.type == V4L2_FRMIVAL_TYPE_STEPWISE) { if (n_fractions == 0) spa_pod_builder_fraction(&b, 25, 1); spa_pod_builder_fraction(&b, state->frmival.stepwise.min.denominator, state->frmival.stepwise.min.numerator); spa_pod_builder_fraction(&b, state->frmival.stepwise.max.denominator, state->frmival.stepwise.max.numerator); if (state->frmival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) { prop->body.flags |= SPA_POD_PROP_RANGE_MIN_MAX; } else { prop->body.flags |= SPA_POD_PROP_RANGE_STEP; spa_pod_builder_fraction(&b, state->frmival.stepwise.step.denominator, state->frmival.stepwise.step.numerator); } break; } n_fractions++; } if (n_fractions <= 1) { prop->body.flags &= ~(SPA_POD_PROP_RANGE_MASK | SPA_POD_PROP_FLAG_UNSET); } spa_pod_builder_pop(&b, &f[1]); spa_pod_builder_pop(&b, &f[0]); *format = SPA_POD_BUILDER_DEREF(&b, f[0].ref, struct spa_format); return SPA_RESULT_OK; } static int spa_v4l2_set_format(struct impl *this, struct spa_video_info *format, bool try_only) { struct port *state = &this->out_ports[0]; int cmd; struct v4l2_format reqfmt, fmt; struct v4l2_streamparm streamparm; const struct format_info *info = NULL; uint32_t video_format; struct spa_rectangle *size = NULL; struct spa_fraction *framerate = NULL; spa_zero(fmt); spa_zero(streamparm); fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if (format->media_subtype == this->type.media_subtype.raw) { video_format = format->info.raw.format; size = &format->info.raw.size; framerate = &format->info.raw.framerate; } else if (format->media_subtype == this->type.media_subtype_video.mjpg || format->media_subtype == this->type.media_subtype_video.jpeg) { video_format = this->type.video_format.ENCODED; size = &format->info.mjpg.size; framerate = &format->info.mjpg.framerate; } else if (format->media_subtype == this->type.media_subtype_video.h264) { video_format = this->type.video_format.ENCODED; size = &format->info.h264.size; framerate = &format->info.h264.framerate; } else { video_format = this->type.video_format.ENCODED; } info = find_format_info_by_media_type(&this->type, format->media_type, format->media_subtype, video_format, 0); if (info == NULL || size == NULL || framerate == NULL) { spa_log_error(state->log, "v4l2: unknown media type %d %d %d", format->media_type, format->media_subtype, video_format); return -1; } fmt.fmt.pix.pixelformat = info->fourcc; fmt.fmt.pix.field = V4L2_FIELD_ANY; fmt.fmt.pix.width = size->width; fmt.fmt.pix.height = size->height; streamparm.parm.capture.timeperframe.numerator = framerate->denom; streamparm.parm.capture.timeperframe.denominator = framerate->num; spa_log_info(state->log, "v4l2: set %08x %dx%d %d/%d", fmt.fmt.pix.pixelformat, fmt.fmt.pix.width, fmt.fmt.pix.height, streamparm.parm.capture.timeperframe.denominator, streamparm.parm.capture.timeperframe.numerator); reqfmt = fmt; if (spa_v4l2_open(this) < 0) return -1; cmd = try_only ? VIDIOC_TRY_FMT : VIDIOC_S_FMT; if (xioctl(state->fd, cmd, &fmt) < 0) { perror("VIDIOC_S_FMT"); return -1; } /* some cheap USB cam's won't accept any change */ if (xioctl(state->fd, VIDIOC_S_PARM, &streamparm) < 0) perror("VIDIOC_S_PARM"); spa_log_info(state->log, "v4l2: got %08x %dx%d %d/%d", fmt.fmt.pix.pixelformat, fmt.fmt.pix.width, fmt.fmt.pix.height, streamparm.parm.capture.timeperframe.denominator, streamparm.parm.capture.timeperframe.numerator); if (reqfmt.fmt.pix.pixelformat != fmt.fmt.pix.pixelformat || reqfmt.fmt.pix.width != fmt.fmt.pix.width || reqfmt.fmt.pix.height != fmt.fmt.pix.height) return -1; if (try_only) return 0; size->width = fmt.fmt.pix.width; size->height = fmt.fmt.pix.height; framerate->num = streamparm.parm.capture.timeperframe.denominator; framerate->denom = streamparm.parm.capture.timeperframe.numerator; state->fmt = fmt; state->info.flags = (state->export_buf ? SPA_PORT_INFO_FLAG_CAN_ALLOC_BUFFERS : 0) | SPA_PORT_INFO_FLAG_CAN_USE_BUFFERS | SPA_PORT_INFO_FLAG_LIVE; state->info.rate = streamparm.parm.capture.timeperframe.denominator; return 0; } static int mmap_read(struct impl *this) { struct port *state = &this->out_ports[0]; struct v4l2_buffer buf; struct buffer *b; struct spa_data *d; int64_t pts; struct spa_port_io *io = state->io; spa_zero(buf); buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; buf.memory = state->memtype; if (xioctl(state->fd, VIDIOC_DQBUF, &buf) < 0) { switch (errno) { case EAGAIN: return SPA_RESULT_ERROR; case EIO: default: perror("VIDIOC_DQBUF"); return SPA_RESULT_ERROR; } } state->last_ticks = (int64_t) buf.timestamp.tv_sec * SPA_USEC_PER_SEC + (uint64_t) buf.timestamp.tv_usec; pts = state->last_ticks * 1000; if (buf.flags & V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC) state->last_monotonic = pts; else state->last_monotonic = SPA_TIME_INVALID; b = &state->buffers[buf.index]; if (b->h) { b->h->flags = 0; if (buf.flags & V4L2_BUF_FLAG_ERROR) b->h->flags |= SPA_META_HEADER_FLAG_CORRUPTED; b->h->seq = buf.sequence; b->h->pts = pts; } d = b->outbuf->datas; d[0].chunk->offset = 0; d[0].chunk->size = buf.bytesused; d[0].chunk->stride = state->fmt.fmt.pix.bytesperline; b->outstanding = true; if (io->status != SPA_RESULT_HAVE_BUFFER) { io->buffer_id = b->outbuf->id; io->status = SPA_RESULT_HAVE_BUFFER; this->callbacks->have_output(this->callbacks_data); } else { spa_v4l2_buffer_recycle(this, b->outbuf->id); } return SPA_RESULT_OK; } static void v4l2_on_fd_events(struct spa_source *source) { struct impl *this = source->data; if (source->rmask & SPA_IO_ERR) return; if (!(source->rmask & SPA_IO_IN)) return; if (mmap_read(this) < 0) return; } static int spa_v4l2_use_buffers(struct impl *this, struct spa_buffer **buffers, uint32_t n_buffers) { struct port *state = &this->out_ports[0]; struct v4l2_requestbuffers reqbuf; int i; struct spa_data *d; if (n_buffers > 0) { d = buffers[0]->datas; if ((d[0].type == this->type.data.MemPtr || d[0].type == this->type.data.MemFd) && d[0].data != NULL) { state->memtype = V4L2_MEMORY_USERPTR; } else if (d[0].type == this->type.data.DmaBuf) { state->memtype = V4L2_MEMORY_DMABUF; } else { spa_log_error(state->log, "v4l2: can't use buffers of type %s (%d)", spa_type_map_get_type (this->map, d[0].type), d[0].type); return SPA_RESULT_ERROR; } } spa_zero(reqbuf); reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; reqbuf.memory = state->memtype; reqbuf.count = n_buffers; if (xioctl(state->fd, VIDIOC_REQBUFS, &reqbuf) < 0) { perror("VIDIOC_REQBUFS"); return SPA_RESULT_ERROR; } spa_log_info(state->log, "v4l2: got %d buffers", reqbuf.count); if (reqbuf.count < n_buffers) { spa_log_error(state->log, "v4l2: can't allocate enough buffers"); return SPA_RESULT_ERROR; } for (i = 0; i < reqbuf.count; i++) { struct buffer *b; b = &state->buffers[i]; b->outbuf = buffers[i]; b->outstanding = true; b->allocated = false; b->h = spa_buffer_find_meta(b->outbuf, this->type.meta.Header); spa_log_info(state->log, "v4l2: import buffer %p", buffers[i]); if (buffers[i]->n_datas < 1) { spa_log_error(state->log, "v4l2: invalid memory on buffer %p", buffers[i]); return SPA_RESULT_ERROR; } d = buffers[i]->datas; spa_zero(b->v4l2_buffer); b->v4l2_buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; b->v4l2_buffer.memory = state->memtype; b->v4l2_buffer.index = i; if (d[0].type == this->type.data.MemPtr || d[0].type == this->type.data.MemFd) { b->v4l2_buffer.m.userptr = (unsigned long) d[0].data; b->v4l2_buffer.length = d[0].maxsize; } else if (d[0].type == this->type.data.DmaBuf) { b->v4l2_buffer.m.fd = d[0].fd; } spa_v4l2_buffer_recycle(this, buffers[i]->id); } state->n_buffers = reqbuf.count; return SPA_RESULT_OK; } static int mmap_init(struct impl *this, struct spa_param **params, uint32_t n_params, struct spa_buffer **buffers, uint32_t *n_buffers) { struct port *state = &this->out_ports[0]; struct v4l2_requestbuffers reqbuf; int i; state->memtype = V4L2_MEMORY_MMAP; spa_zero(reqbuf); reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; reqbuf.memory = state->memtype; reqbuf.count = *n_buffers; if (xioctl(state->fd, VIDIOC_REQBUFS, &reqbuf) < 0) { perror("VIDIOC_REQBUFS"); return SPA_RESULT_ERROR; } spa_log_info(state->log, "v4l2: got %d buffers", reqbuf.count); *n_buffers = reqbuf.count; if (reqbuf.count < 2) { spa_log_error(state->log, "v4l2: can't allocate enough buffers"); return SPA_RESULT_ERROR; } if (state->export_buf) spa_log_info(state->log, "v4l2: using EXPBUF"); for (i = 0; i < reqbuf.count; i++) { struct buffer *b; struct spa_data *d; if (buffers[i]->n_datas < 1) { spa_log_error(state->log, "v4l2: invalid buffer data"); return SPA_RESULT_ERROR; } b = &state->buffers[i]; b->outbuf = buffers[i]; b->outstanding = true; b->allocated = true; b->h = spa_buffer_find_meta(b->outbuf, this->type.meta.Header); spa_zero(b->v4l2_buffer); b->v4l2_buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; b->v4l2_buffer.memory = state->memtype; b->v4l2_buffer.index = i; if (xioctl(state->fd, VIDIOC_QUERYBUF, &b->v4l2_buffer) < 0) { perror("VIDIOC_QUERYBUF"); return SPA_RESULT_ERROR; } d = buffers[i]->datas; d[0].mapoffset = 0; d[0].maxsize = b->v4l2_buffer.length; d[0].chunk->offset = 0; d[0].chunk->size = b->v4l2_buffer.length; d[0].chunk->stride = state->fmt.fmt.pix.bytesperline; if (state->export_buf) { struct v4l2_exportbuffer expbuf; spa_zero(expbuf); expbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; expbuf.index = i; expbuf.flags = O_CLOEXEC | O_RDONLY; if (xioctl(state->fd, VIDIOC_EXPBUF, &expbuf) < 0) { perror("VIDIOC_EXPBUF"); continue; } d[0].type = this->type.data.DmaBuf; d[0].fd = expbuf.fd; d[0].data = NULL; } else { d[0].type = this->type.data.MemPtr; d[0].fd = -1; d[0].data = mmap(NULL, b->v4l2_buffer.length, PROT_READ, MAP_SHARED, state->fd, b->v4l2_buffer.m.offset); if (d[0].data == MAP_FAILED) { perror("mmap"); continue; } } spa_v4l2_buffer_recycle(this, i); } state->n_buffers = reqbuf.count; return SPA_RESULT_OK; } static int userptr_init(struct impl *this) { return SPA_RESULT_NOT_IMPLEMENTED; } static int read_init(struct impl *this) { return SPA_RESULT_NOT_IMPLEMENTED; } static int spa_v4l2_alloc_buffers(struct impl *this, struct spa_param **params, uint32_t n_params, struct spa_buffer **buffers, uint32_t *n_buffers) { int res; struct port *state = &this->out_ports[0]; if (state->n_buffers > 0) return SPA_RESULT_ERROR; if (state->cap.capabilities & V4L2_CAP_STREAMING) { if ((res = mmap_init(this, params, n_params, buffers, n_buffers)) < 0) if ((res = userptr_init(this)) < 0) return res; } else if (state->cap.capabilities & V4L2_CAP_READWRITE) { if ((res = read_init(this)) < 0) return res; } else return SPA_RESULT_ERROR; return SPA_RESULT_OK; } static int spa_v4l2_stream_on(struct impl *this) { struct port *state = &this->out_ports[0]; enum v4l2_buf_type type; if (state->started) return SPA_RESULT_OK; type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if (xioctl(state->fd, VIDIOC_STREAMON, &type) < 0) { spa_log_error(this->log, "VIDIOC_STREAMON: %s", strerror(errno)); return SPA_RESULT_ERROR; } state->started = true; return SPA_RESULT_OK; } static int spa_v4l2_stream_off(struct impl *this) { struct port *state = &this->out_ports[0]; enum v4l2_buf_type type; int i; if (!state->started) return SPA_RESULT_OK; spa_v4l2_port_set_enabled(this, false); type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if (xioctl(state->fd, VIDIOC_STREAMOFF, &type) < 0) { spa_log_error(this->log, "VIDIOC_STREAMOFF: %s", strerror(errno)); return SPA_RESULT_ERROR; } for (i = 0; i < state->n_buffers; i++) { struct buffer *b; b = &state->buffers[i]; if (!b->outstanding) if (xioctl(state->fd, VIDIOC_QBUF, &b->v4l2_buffer) < 0) spa_log_warn(this->log, "VIDIOC_QBUF: %s", strerror(errno)); } state->started = false; return SPA_RESULT_OK; }