diff options
Diffstat (limited to 'spa/plugins/v4l2/v4l2-utils.c')
| -rw-r--r-- | spa/plugins/v4l2/v4l2-utils.c | 1743 |
1 files changed, 1743 insertions, 0 deletions
diff --git a/spa/plugins/v4l2/v4l2-utils.c b/spa/plugins/v4l2/v4l2-utils.c new file mode 100644 index 0000000..8ffda13 --- /dev/null +++ b/spa/plugins/v4l2/v4l2-utils.c @@ -0,0 +1,1743 @@ +/* Spa + * + * Copyright © 2018 Wim Taymans + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <sched.h> +#include <errno.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <poll.h> + +#include <spa/utils/result.h> + +static int xioctl(int fd, int request, void *arg) +{ + int err; + + do { + err = ioctl(fd, request, arg); + } while (err == -1 && errno == EINTR); + + return err; +} + +int spa_v4l2_open(struct spa_v4l2_device *dev, const char *path) +{ + struct stat st; + int err; + + if (dev->fd != -1) + return 0; + + if (path == NULL) { + spa_log_error(dev->log, "Device property not set"); + return -EIO; + } + + spa_log_info(dev->log, "device is '%s'", path); + + dev->fd = open(path, O_RDWR | O_NONBLOCK, 0); + if (dev->fd == -1) { + err = errno; + spa_log_error(dev->log, "Cannot open '%s': %d, %s", + path, err, strerror(err)); + goto error; + } + + if (fstat(dev->fd, &st) < 0) { + err = errno; + spa_log_error(dev->log, "Cannot identify '%s': %d, %s", + path, err, strerror(err)); + goto error_close; + } + + if (!S_ISCHR(st.st_mode)) { + spa_log_error(dev->log, "%s is no device", path); + err = ENODEV; + goto error_close; + } + + if (xioctl(dev->fd, VIDIOC_QUERYCAP, &dev->cap) < 0) { + err = errno; + spa_log_error(dev->log, "'%s' QUERYCAP: %m", path); + goto error_close; + } + snprintf(dev->path, sizeof(dev->path), "%s", path); + return 0; + +error_close: + close(dev->fd); + dev->fd = -1; +error: + return -err; +} + +int spa_v4l2_is_capture(struct spa_v4l2_device *dev) +{ + uint32_t caps = dev->cap.capabilities; + if ((caps & V4L2_CAP_DEVICE_CAPS)) + caps = dev->cap.device_caps; + return (caps & V4L2_CAP_VIDEO_CAPTURE) == V4L2_CAP_VIDEO_CAPTURE; +} + +int spa_v4l2_close(struct spa_v4l2_device *dev) +{ + if (dev->fd == -1) + return 0; + + if (dev->active || dev->have_format) + return 0; + + spa_log_info(dev->log, "close '%s'", dev->path); + + if (close(dev->fd)) + spa_log_warn(dev->log, "close: %m"); + + dev->fd = -1; + return 0; +} + +static int spa_v4l2_buffer_recycle(struct impl *this, uint32_t buffer_id) +{ + struct port *port = &this->out_ports[0]; + struct buffer *b = &port->buffers[buffer_id]; + struct spa_v4l2_device *dev = &port->dev; + int err; + + if (!SPA_FLAG_IS_SET(b->flags, BUFFER_FLAG_OUTSTANDING)) + return 0; + + SPA_FLAG_CLEAR(b->flags, BUFFER_FLAG_OUTSTANDING); + spa_log_trace(this->log, "v4l2 %p: recycle buffer %d", this, buffer_id); + + if (xioctl(dev->fd, VIDIOC_QBUF, &b->v4l2_buffer) < 0) { + err = errno; + spa_log_error(this->log, "'%s' VIDIOC_QBUF: %m", this->props.device); + return -err; + } + + return 0; +} + +static int spa_v4l2_clear_buffers(struct impl *this) +{ + struct port *port = &this->out_ports[0]; + struct v4l2_requestbuffers reqbuf; + uint32_t i; + + if (port->n_buffers == 0) + return 0; + + for (i = 0; i < port->n_buffers; i++) { + struct buffer *b; + struct spa_data *d; + + b = &port->buffers[i]; + d = b->outbuf->datas; + + if (SPA_FLAG_IS_SET(b->flags, BUFFER_FLAG_OUTSTANDING)) { + spa_log_debug(this->log, "queueing outstanding buffer %p", b); + spa_v4l2_buffer_recycle(this, i); + } + if (SPA_FLAG_IS_SET(b->flags, BUFFER_FLAG_MAPPED)) { + munmap(b->ptr, d[0].maxsize); + } + if (SPA_FLAG_IS_SET(b->flags, BUFFER_FLAG_ALLOCATED)) { + spa_log_debug(this->log, "close %d", (int) d[0].fd); + close(d[0].fd); + } + d[0].type = SPA_ID_INVALID; + } + + spa_zero(reqbuf); + reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + reqbuf.memory = port->memtype; + reqbuf.count = 0; + + if (xioctl(port->dev.fd, VIDIOC_REQBUFS, &reqbuf) < 0) { + spa_log_warn(this->log, "VIDIOC_REQBUFS: %m"); + } + port->n_buffers = 0; + + return 0; +} + + +struct format_info { + uint32_t fourcc; + uint32_t format; + uint32_t media_type; + uint32_t media_subtype; +}; + +#define VIDEO SPA_MEDIA_TYPE_video +#define IMAGE SPA_MEDIA_TYPE_image + +#define RAW SPA_MEDIA_SUBTYPE_raw + +#define BAYER SPA_MEDIA_SUBTYPE_bayer +#define MJPG SPA_MEDIA_SUBTYPE_mjpg +#define JPEG SPA_MEDIA_SUBTYPE_jpeg +#define DV SPA_MEDIA_SUBTYPE_dv +#define MPEGTS SPA_MEDIA_SUBTYPE_mpegts +#define H264 SPA_MEDIA_SUBTYPE_h264 +#define H263 SPA_MEDIA_SUBTYPE_h263 +#define MPEG1 SPA_MEDIA_SUBTYPE_mpeg1 +#define MPEG2 SPA_MEDIA_SUBTYPE_mpeg2 +#define MPEG4 SPA_MEDIA_SUBTYPE_mpeg4 +#define XVID SPA_MEDIA_SUBTYPE_xvid +#define VC1 SPA_MEDIA_SUBTYPE_vc1 +#define VP8 SPA_MEDIA_SUBTYPE_vp8 + +#define FORMAT_UNKNOWN SPA_VIDEO_FORMAT_UNKNOWN +#define FORMAT_ENCODED SPA_VIDEO_FORMAT_ENCODED +#define FORMAT_RGB15 SPA_VIDEO_FORMAT_RGB15 +#define FORMAT_BGR15 SPA_VIDEO_FORMAT_BGR15 +#define FORMAT_RGB16 SPA_VIDEO_FORMAT_RGB16 +#define FORMAT_BGR SPA_VIDEO_FORMAT_BGR +#define FORMAT_RGB SPA_VIDEO_FORMAT_RGB +#define FORMAT_BGRA SPA_VIDEO_FORMAT_BGRA +#define FORMAT_BGRx SPA_VIDEO_FORMAT_BGRx +#define FORMAT_ARGB SPA_VIDEO_FORMAT_ARGB +#define FORMAT_xRGB SPA_VIDEO_FORMAT_xRGB +#define FORMAT_GRAY8 SPA_VIDEO_FORMAT_GRAY8 +#define FORMAT_GRAY16_LE SPA_VIDEO_FORMAT_GRAY16_LE +#define FORMAT_GRAY16_BE SPA_VIDEO_FORMAT_GRAY16_BE +#define FORMAT_YVU9 SPA_VIDEO_FORMAT_YVU9 +#define FORMAT_YV12 SPA_VIDEO_FORMAT_YV12 +#define FORMAT_YUY2 SPA_VIDEO_FORMAT_YUY2 +#define FORMAT_YVYU SPA_VIDEO_FORMAT_YVYU +#define FORMAT_UYVY SPA_VIDEO_FORMAT_UYVY +#define FORMAT_Y42B SPA_VIDEO_FORMAT_Y42B +#define FORMAT_Y41B SPA_VIDEO_FORMAT_Y41B +#define FORMAT_YUV9 SPA_VIDEO_FORMAT_YUV9 +#define FORMAT_I420 SPA_VIDEO_FORMAT_I420 +#define FORMAT_NV12 SPA_VIDEO_FORMAT_NV12 +#define FORMAT_NV12_64Z32 SPA_VIDEO_FORMAT_NV12_64Z32 +#define FORMAT_NV21 SPA_VIDEO_FORMAT_NV21 +#define FORMAT_NV16 SPA_VIDEO_FORMAT_NV16 +#define FORMAT_NV61 SPA_VIDEO_FORMAT_NV61 +#define FORMAT_NV24 SPA_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, VIDEO, MJPG}, + {V4L2_PIX_FMT_PJPG, FORMAT_ENCODED, VIDEO, MJPG}, + {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) +{ + SPA_FOR_EACH_ELEMENT_VAR(format_info, i) { + if (i->fourcc == fourcc) + return i; + } + return NULL; +} + +#if 0 +static const struct format_info *video_format_to_format_info(uint32_t format) +{ + SPA_FOR_EACH_ELEMENT_VAR(format_info, i) { + if (i->format == format) + return i; + } + return NULL; +} +#endif + +static const struct format_info *find_format_info_by_media_type(uint32_t type, + uint32_t subtype, + uint32_t format, + int startidx) +{ + size_t i; + + for (i = startidx; i < SPA_N_ELEMENTS(format_info); i++) { + const struct format_info *fi = &format_info[i]; + if ((fi->media_type == type) && + (fi->media_subtype == subtype) && + (format == 0 || fi->format == format)) + return fi; + } + return NULL; +} + +static uint32_t +enum_filter_format(uint32_t media_type, int32_t media_subtype, + const struct spa_pod *filter, uint32_t index) +{ + uint32_t video_format = 0; + + switch (media_type) { + case SPA_MEDIA_TYPE_video: + case SPA_MEDIA_TYPE_image: + if (media_subtype == SPA_MEDIA_SUBTYPE_raw) { + const struct spa_pod_prop *p; + const struct spa_pod *val; + uint32_t n_values, choice; + const uint32_t *values; + + if (!(p = spa_pod_find_prop(filter, NULL, SPA_FORMAT_VIDEO_format))) + return SPA_VIDEO_FORMAT_UNKNOWN; + + val = spa_pod_get_values(&p->value, &n_values, &choice); + + if (val->type != SPA_TYPE_Id) + return SPA_VIDEO_FORMAT_UNKNOWN; + + values = SPA_POD_BODY(val); + + if (choice == SPA_CHOICE_None) { + if (index == 0) + video_format = values[0]; + } else { + if (index + 1 < n_values) + video_format = values[index + 1]; + } + } else { + if (index == 0) + video_format = SPA_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, int seq, + uint32_t start, uint32_t num, + const struct spa_pod *filter) +{ + struct port *port = &this->out_ports[0]; + int res, n_fractions; + const struct format_info *info; + struct spa_pod_choice *choice; + uint32_t filter_media_type, filter_media_subtype, video_format; + struct spa_v4l2_device *dev = &port->dev; + uint8_t buffer[1024]; + struct spa_pod_builder b = { 0 }; + struct spa_pod_frame f[2]; + struct spa_result_node_params result; + uint32_t count = 0; + + if ((res = spa_v4l2_open(dev, this->props.device)) < 0) + return res; + + result.id = SPA_PARAM_EnumFormat; + result.next = start; + + if (result.next == 0) { + spa_zero(port->fmtdesc); + port->fmtdesc.index = 0; + port->fmtdesc.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + port->next_fmtdesc = true; + spa_zero(port->frmsize); + port->next_frmsize = true; + spa_zero(port->frmival); + } + + if (filter) { + if ((res = spa_format_parse(filter, &filter_media_type, &filter_media_subtype)) < 0) + return res; + } + + if (false) { + next_fmtdesc: + port->fmtdesc.index++; + port->next_fmtdesc = true; + } + + next: + result.index = result.next++; + + while (port->next_fmtdesc) { + if (filter) { + struct v4l2_format fmt; + + video_format = enum_filter_format(filter_media_type, + filter_media_subtype, + filter, port->fmtdesc.index); + + if (video_format == SPA_VIDEO_FORMAT_UNKNOWN) + goto enum_end; + + info = find_format_info_by_media_type(filter_media_type, + filter_media_subtype, + video_format, 0); + if (info == NULL) + goto next_fmtdesc; + + port->fmtdesc.pixelformat = info->fourcc; + + spa_zero(fmt); + fmt.type = port->fmtdesc.type; + fmt.fmt.pix.pixelformat = info->fourcc; + fmt.fmt.pix.field = V4L2_FIELD_ANY; + fmt.fmt.pix.width = 0; + fmt.fmt.pix.height = 0; + + if ((res = xioctl(dev->fd, VIDIOC_TRY_FMT, &fmt)) < 0) { + spa_log_debug(this->log, "'%s' VIDIOC_TRY_FMT %08x: %m", + this->props.device, info->fourcc); + goto next_fmtdesc; + } + if (fmt.fmt.pix.pixelformat != info->fourcc) { + spa_log_debug(this->log, "'%s' VIDIOC_TRY_FMT wanted %.4s gave %.4s", + this->props.device, (char*)&info->fourcc, + (char*)&fmt.fmt.pix.pixelformat); + goto next_fmtdesc; + } + + } else { + if ((res = xioctl(dev->fd, VIDIOC_ENUM_FMT, &port->fmtdesc)) < 0) { + if (errno == EINVAL) + goto enum_end; + + res = -errno; + spa_log_error(this->log, "'%s' VIDIOC_ENUM_FMT: %m", + this->props.device); + goto exit; + } + } + port->next_fmtdesc = false; + port->frmsize.index = 0; + port->frmsize.pixel_format = port->fmtdesc.pixelformat; + port->next_frmsize = true; + } + if (!(info = fourcc_to_format_info(port->fmtdesc.pixelformat))) + goto next_fmtdesc; + + next_frmsize: + while (port->next_frmsize) { + if (filter) { + const struct spa_pod_prop *p; + struct spa_pod *val; + uint32_t n_vals, choice; + + /* check if we have a fixed frame size */ + if (!(p = spa_pod_find_prop(filter, NULL, SPA_FORMAT_VIDEO_size))) + goto do_frmsize; + + val = spa_pod_get_values(&p->value, &n_vals, &choice); + if (val->type != SPA_TYPE_Rectangle) + goto enum_end; + + if (choice == SPA_CHOICE_None) { + const struct spa_rectangle *values = SPA_POD_BODY(val); + + if (port->frmsize.index > 0) + goto next_fmtdesc; + + port->frmsize.type = V4L2_FRMSIZE_TYPE_DISCRETE; + port->frmsize.discrete.width = values[0].width; + port->frmsize.discrete.height = values[0].height; + goto have_size; + } + } + do_frmsize: + if ((res = xioctl(dev->fd, VIDIOC_ENUM_FRAMESIZES, &port->frmsize)) < 0) { + if (errno == EINVAL) + goto next_fmtdesc; + + res = -errno; + spa_log_error(this->log, "'%s' VIDIOC_ENUM_FRAMESIZES: %m", + this->props.device); + goto exit; + } + if (filter) { + static const struct spa_rectangle step = {1, 1}; + + const struct spa_rectangle *values; + const struct spa_pod_prop *p; + struct spa_pod *val; + uint32_t choice, i, n_values; + + /* check if we have a fixed frame size */ + if (!(p = spa_pod_find_prop(filter, NULL, SPA_FORMAT_VIDEO_size))) + goto have_size; + + val = spa_pod_get_values(&p->value, &n_values, &choice); + if (val->type != SPA_TYPE_Rectangle) + goto have_size; + + values = SPA_POD_BODY_CONST(val); + + if (choice == SPA_CHOICE_Range && n_values > 2) { + if (filter_framesize(&port->frmsize, &values[1], &values[2], &step)) + goto have_size; + } else if (choice == SPA_CHOICE_Step && n_values > 3) { + if (filter_framesize(&port->frmsize, &values[1], &values[2], &values[3])) + goto have_size; + } else if (choice == SPA_CHOICE_Enum) { + for (i = 1; i < n_values; i++) { + if (filter_framesize(&port->frmsize, &values[i], &values[i], &step)) + goto have_size; + } + } + /* nothing matches the filter, get next frame size */ + port->frmsize.index++; + continue; + } + + have_size: + if (port->frmsize.type == V4L2_FRMSIZE_TYPE_DISCRETE) { + /* we have a fixed size, use this to get the frame intervals */ + port->frmival.index = 0; + port->frmival.pixel_format = port->frmsize.pixel_format; + port->frmival.width = port->frmsize.discrete.width; + port->frmival.height = port->frmsize.discrete.height; + port->next_frmsize = false; + } else if (port->frmsize.type == V4L2_FRMSIZE_TYPE_CONTINUOUS || + port->frmsize.type == V4L2_FRMSIZE_TYPE_STEPWISE) { + /* we have a non fixed size, fix to something sensible to get the + * framerate */ + port->frmival.index = 0; + port->frmival.pixel_format = port->frmsize.pixel_format; + port->frmival.width = port->frmsize.stepwise.min_width; + port->frmival.height = port->frmsize.stepwise.min_height; + port->next_frmsize = false; + } else { + port->frmsize.index++; + } + } + + spa_pod_builder_init(&b, buffer, sizeof(buffer)); + spa_pod_builder_push_object(&b, &f[0], SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat); + spa_pod_builder_add(&b, + SPA_FORMAT_mediaType, SPA_POD_Id(info->media_type), + SPA_FORMAT_mediaSubtype, SPA_POD_Id(info->media_subtype), + 0); + + if (info->media_subtype == SPA_MEDIA_SUBTYPE_raw) { + spa_pod_builder_prop(&b, SPA_FORMAT_VIDEO_format, 0); + spa_pod_builder_id(&b, info->format); + } + spa_pod_builder_prop(&b, SPA_FORMAT_VIDEO_size, 0); + if (port->frmsize.type == V4L2_FRMSIZE_TYPE_DISCRETE) { + spa_pod_builder_rectangle(&b, + port->frmsize.discrete.width, + port->frmsize.discrete.height); + } else if (port->frmsize.type == V4L2_FRMSIZE_TYPE_CONTINUOUS || + port->frmsize.type == V4L2_FRMSIZE_TYPE_STEPWISE) { + spa_pod_builder_push_choice(&b, &f[1], SPA_CHOICE_None, 0); + choice = (struct spa_pod_choice*)spa_pod_builder_frame(&b, &f[1]); + + spa_pod_builder_rectangle(&b, + port->frmsize.stepwise.min_width, + port->frmsize.stepwise.min_height); + spa_pod_builder_rectangle(&b, + port->frmsize.stepwise.min_width, + port->frmsize.stepwise.min_height); + spa_pod_builder_rectangle(&b, + port->frmsize.stepwise.max_width, + port->frmsize.stepwise.max_height); + + if (port->frmsize.type == V4L2_FRMSIZE_TYPE_CONTINUOUS) { + choice->body.type = SPA_CHOICE_Range; + } else { + choice->body.type = SPA_CHOICE_Step; + spa_pod_builder_rectangle(&b, + port->frmsize.stepwise.max_width, + port->frmsize.stepwise.max_height); + } + spa_pod_builder_pop(&b, &f[1]); + } + + spa_pod_builder_prop(&b, SPA_FORMAT_VIDEO_framerate, 0); + + n_fractions = 0; + + spa_pod_builder_push_choice(&b, &f[1], SPA_CHOICE_None, 0); + choice = (struct spa_pod_choice*)spa_pod_builder_frame(&b, &f[1]); + port->frmival.index = 0; + + while (true) { + if ((res = xioctl(dev->fd, VIDIOC_ENUM_FRAMEINTERVALS, &port->frmival)) < 0) { + res = -errno; + if (errno == EINVAL) { + port->frmsize.index++; + port->next_frmsize = true; + if (port->frmival.index == 0) + goto next_frmsize; + break; + } + spa_log_error(this->log, "'%s' VIDIOC_ENUM_FRAMEINTERVALS: %m", + this->props.device); + goto exit; + } + if (filter) { + static const struct spa_fraction step = {1, 1}; + + const struct spa_fraction *values; + const struct spa_pod_prop *p; + struct spa_pod *val; + uint32_t i, n_values, choice; + + if (!(p = spa_pod_find_prop(filter, NULL, SPA_FORMAT_VIDEO_framerate))) + goto have_framerate; + + val = spa_pod_get_values(&p->value, &n_values, &choice); + + if (val->type != SPA_TYPE_Fraction) + goto enum_end; + + values = SPA_POD_BODY(val); + + switch (choice) { + case SPA_CHOICE_None: + if (filter_framerate(&port->frmival, &values[0], &values[0], &step)) + goto have_framerate; + break; + + case SPA_CHOICE_Range: + if (n_values > 2 && filter_framerate(&port->frmival, &values[1], &values[2], &step)) + goto have_framerate; + break; + + case SPA_CHOICE_Step: + if (n_values > 3 && filter_framerate(&port->frmival, &values[1], &values[2], &values[3])) + goto have_framerate; + break; + + case SPA_CHOICE_Enum: + for (i = 1; i < n_values; i++) { + if (filter_framerate(&port->frmival, &values[i], &values[i], &step)) + goto have_framerate; + } + break; + default: + break; + } + port->frmival.index++; + continue; + } + + have_framerate: + + if (port->frmival.type == V4L2_FRMIVAL_TYPE_DISCRETE) { + choice->body.type = SPA_CHOICE_Enum; + if (n_fractions == 0) + spa_pod_builder_fraction(&b, + port->frmival.discrete.denominator, + port->frmival.discrete.numerator); + spa_pod_builder_fraction(&b, + port->frmival.discrete.denominator, + port->frmival.discrete.numerator); + port->frmival.index++; + } else if (port->frmival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS || + port->frmival.type == V4L2_FRMIVAL_TYPE_STEPWISE) { + if (n_fractions == 0) + spa_pod_builder_fraction(&b, 25, 1); + spa_pod_builder_fraction(&b, + port->frmival.stepwise.min.denominator, + port->frmival.stepwise.min.numerator); + spa_pod_builder_fraction(&b, + port->frmival.stepwise.max.denominator, + port->frmival.stepwise.max.numerator); + + if (port->frmival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) { + choice->body.type = SPA_CHOICE_Range; + } else { + choice->body.type = SPA_CHOICE_Step; + spa_pod_builder_fraction(&b, + port->frmival.stepwise.step.denominator, + port->frmival.stepwise.step.numerator); + } + + port->frmsize.index++; + port->next_frmsize = true; + break; + } + n_fractions++; + } + if (n_fractions <= 1) + choice->body.type = SPA_CHOICE_None; + + spa_pod_builder_pop(&b, &f[1]); + result.param = spa_pod_builder_pop(&b, &f[0]); + + spa_node_emit_result(&this->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result); + + if (++count != num) + goto next; + + enum_end: + res = 0; + exit: + spa_v4l2_close(dev); + return res; +} + +static int spa_v4l2_set_format(struct impl *this, struct spa_video_info *format, uint32_t flags) +{ + struct port *port = &this->out_ports[0]; + struct spa_v4l2_device *dev = &port->dev; + int res, 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; + bool match; + + spa_zero(fmt); + fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + + spa_zero(streamparm); + streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + + switch (format->media_subtype) { + case SPA_MEDIA_SUBTYPE_raw: + video_format = format->info.raw.format; + size = &format->info.raw.size; + framerate = &format->info.raw.framerate; + break; + case SPA_MEDIA_SUBTYPE_mjpg: + case SPA_MEDIA_SUBTYPE_jpeg: + video_format = SPA_VIDEO_FORMAT_ENCODED; + size = &format->info.mjpg.size; + framerate = &format->info.mjpg.framerate; + break; + case SPA_MEDIA_SUBTYPE_h264: + video_format = SPA_VIDEO_FORMAT_ENCODED; + size = &format->info.h264.size; + framerate = &format->info.h264.framerate; + break; + default: + video_format = SPA_VIDEO_FORMAT_ENCODED; + break; + } + + info = find_format_info_by_media_type(format->media_type, + format->media_subtype, video_format, 0); + if (info == NULL || size == NULL || framerate == NULL) { + spa_log_error(this->log, "unknown media type %d %d %d", format->media_type, + format->media_subtype, video_format); + return -EINVAL; + } + + 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_debug(this->log, "set %.4s %dx%d %d/%d", (char *)&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 ((res = spa_v4l2_open(dev, this->props.device)) < 0) + return res; + + cmd = (flags & SPA_NODE_PARAM_FLAG_TEST_ONLY) ? VIDIOC_TRY_FMT : VIDIOC_S_FMT; + if (xioctl(dev->fd, cmd, &fmt) < 0) { + res = -errno; + spa_log_error(this->log, "'%s' VIDIOC_S_FMT: %m", + this->props.device); + return res; + } + + /* some cheap USB cam's won't accept any change */ + if (xioctl(dev->fd, VIDIOC_S_PARM, &streamparm) < 0) + spa_log_warn(this->log, "VIDIOC_S_PARM: %m"); + + match = (reqfmt.fmt.pix.pixelformat == fmt.fmt.pix.pixelformat && + reqfmt.fmt.pix.width == fmt.fmt.pix.width && + reqfmt.fmt.pix.height == fmt.fmt.pix.height); + + if (!match && !SPA_FLAG_IS_SET(flags, SPA_NODE_PARAM_FLAG_NEAREST)) { + spa_log_error(this->log, "wanted %.4s %dx%d, got %.4s %dx%d", + (char *)&reqfmt.fmt.pix.pixelformat, + reqfmt.fmt.pix.width, reqfmt.fmt.pix.height, + (char *)&fmt.fmt.pix.pixelformat, + fmt.fmt.pix.width, fmt.fmt.pix.height); + return -EINVAL; + } + + if (flags & SPA_NODE_PARAM_FLAG_TEST_ONLY) + return match ? 0 : 1; + + spa_log_info(this->log, "'%s' got %.4s %dx%d %d/%d", + dev->path, (char *)&fmt.fmt.pix.pixelformat, + fmt.fmt.pix.width, fmt.fmt.pix.height, + streamparm.parm.capture.timeperframe.denominator, + streamparm.parm.capture.timeperframe.numerator); + + dev->have_format = true; + size->width = fmt.fmt.pix.width; + size->height = fmt.fmt.pix.height; + port->rate.denom = framerate->num = streamparm.parm.capture.timeperframe.denominator; + port->rate.num = framerate->denom = streamparm.parm.capture.timeperframe.numerator; + + port->fmt = fmt; + port->info.change_mask |= SPA_PORT_CHANGE_MASK_FLAGS | SPA_PORT_CHANGE_MASK_RATE; + port->info.flags = (port->alloc_buffers ? SPA_PORT_FLAG_CAN_ALLOC_BUFFERS : 0) | + SPA_PORT_FLAG_LIVE | + SPA_PORT_FLAG_PHYSICAL | + SPA_PORT_FLAG_TERMINAL; + port->info.rate = SPA_FRACTION(port->rate.num, port->rate.denom); + + return match ? 0 : 1; +} + +static int query_ext_ctrl_ioctl(struct port *port, struct v4l2_query_ext_ctrl *qctrl) +{ + struct spa_v4l2_device *dev = &port->dev; + struct v4l2_queryctrl qc; + int res; + + if (port->have_query_ext_ctrl) { + res = xioctl(dev->fd, VIDIOC_QUERY_EXT_CTRL, qctrl); + if (errno != ENOTTY) + return res; + port->have_query_ext_ctrl = false; + } + spa_zero(qc); + qc.id = qctrl->id; + res = xioctl(dev->fd, VIDIOC_QUERYCTRL, &qc); + if (res == 0) { + qctrl->type = qc.type; + memcpy(qctrl->name, qc.name, sizeof(qctrl->name)); + qctrl->minimum = qc.minimum; + if (qc.type == V4L2_CTRL_TYPE_BITMASK) { + qctrl->maximum = (__u32)qc.maximum; + qctrl->default_value = (__u32)qc.default_value; + } else { + qctrl->maximum = qc.maximum; + qctrl->default_value = qc.default_value; + } + qctrl->step = qc.step; + qctrl->flags = qc.flags; + qctrl->elems = 1; + qctrl->nr_of_dims = 0; + memset(qctrl->dims, 0, sizeof(qctrl->dims)); + switch (qctrl->type) { + case V4L2_CTRL_TYPE_INTEGER64: + qctrl->elem_size = sizeof(__s64); + break; + case V4L2_CTRL_TYPE_STRING: + qctrl->elem_size = qc.maximum + 1; + break; + default: + qctrl->elem_size = sizeof(__s32); + break; + } + memset(qctrl->reserved, 0, sizeof(qctrl->reserved)); + } + qctrl->id = qc.id; + return res; +} + +static struct { + uint32_t v4l2_id; + uint32_t spa_id; +} control_map[] = { + { V4L2_CID_BRIGHTNESS, SPA_PROP_brightness }, + { V4L2_CID_CONTRAST, SPA_PROP_contrast }, + { V4L2_CID_SATURATION, SPA_PROP_saturation }, + { V4L2_CID_HUE, SPA_PROP_hue }, + { V4L2_CID_GAMMA, SPA_PROP_gamma }, + { V4L2_CID_EXPOSURE, SPA_PROP_exposure }, + { V4L2_CID_GAIN, SPA_PROP_gain }, + { V4L2_CID_SHARPNESS, SPA_PROP_sharpness }, +}; + +static uint32_t control_to_prop_id(struct impl *impl, uint32_t control_id) +{ + SPA_FOR_EACH_ELEMENT_VAR(control_map, c) { + if (c->v4l2_id == control_id) + return c->spa_id; + } + return SPA_PROP_START_CUSTOM + control_id; +} + +static uint32_t prop_id_to_control(struct impl *impl, uint32_t prop_id) +{ + SPA_FOR_EACH_ELEMENT_VAR(control_map, c) { + if (c->spa_id == prop_id) + return c->v4l2_id; + } + if (prop_id >= SPA_PROP_START_CUSTOM) + return prop_id - SPA_PROP_START_CUSTOM; + return SPA_ID_INVALID; +} + +static int +spa_v4l2_enum_controls(struct impl *this, int seq, + uint32_t start, uint32_t num, + const struct spa_pod *filter) +{ + struct port *port = &this->out_ports[0]; + struct spa_v4l2_device *dev = &port->dev; + struct v4l2_query_ext_ctrl queryctrl; + struct spa_pod *param; + struct spa_pod_builder b = { 0 }; + uint32_t prop_id, ctrl_id; + uint8_t buffer[1024]; + int res; + const unsigned next_fl = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND; + struct spa_pod_frame f[2]; + struct spa_result_node_params result; + uint32_t count = 0; + + if ((res = spa_v4l2_open(dev, this->props.device)) < 0) + return res; + + result.id = SPA_PARAM_PropInfo; + result.next = start; + next: + result.index = result.next; + + spa_zero(queryctrl); + + if (result.next == 0) { + result.next |= next_fl; + port->n_controls = 0; + } + + queryctrl.id = result.next; + spa_log_debug(this->log, "test control %08x", queryctrl.id); + + if (query_ext_ctrl_ioctl(port, &queryctrl) != 0) { + if (errno == ENOTTY) + goto enum_end; + if (errno == EINVAL) { + if (queryctrl.id != next_fl) + goto enum_end; + + if (result.next & next_fl) + result.next = V4L2_CID_USER_BASE; + else if (result.next >= V4L2_CID_USER_BASE && result.next < V4L2_CID_LASTP1) + result.next++; + else if (result.next >= V4L2_CID_LASTP1) + result.next = V4L2_CID_PRIVATE_BASE; + else + goto enum_end; + goto next; + } + res = -errno; + spa_log_error(this->log, "'%s' VIDIOC_QUERYCTRL: %m", this->props.device); + spa_v4l2_close(dev); + return res; + } + if (result.next & next_fl) + result.next = queryctrl.id | next_fl; + else + result.next++; + + if (queryctrl.flags & V4L2_CTRL_FLAG_DISABLED) + goto next; + + if (port->n_controls >= MAX_CONTROLS) + goto enum_end; + + ctrl_id = queryctrl.id & ~next_fl; + + spa_pod_builder_init(&b, buffer, sizeof(buffer)); + + prop_id = control_to_prop_id(this, ctrl_id); + + port->controls[port->n_controls].id = prop_id; + port->controls[port->n_controls].ctrl_id = ctrl_id; + port->controls[port->n_controls].value = queryctrl.default_value; + + spa_log_debug(this->log, "Control '%s' %d %d", queryctrl.name, prop_id, ctrl_id); + + port->n_controls++; + + switch (queryctrl.type) { + case V4L2_CTRL_TYPE_INTEGER: + param = spa_pod_builder_add_object(&b, + SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo, + SPA_PROP_INFO_id, SPA_POD_Id(prop_id), + SPA_PROP_INFO_type, SPA_POD_CHOICE_STEP_Int( + (int32_t)queryctrl.default_value, + (int32_t)queryctrl.minimum, + (int32_t)queryctrl.maximum, + (int32_t)queryctrl.step), + SPA_PROP_INFO_description, SPA_POD_String(queryctrl.name)); + break; + case V4L2_CTRL_TYPE_BOOLEAN: + param = spa_pod_builder_add_object(&b, + SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo, + SPA_PROP_INFO_id, SPA_POD_Id(prop_id), + SPA_PROP_INFO_type, SPA_POD_CHOICE_Bool((bool)queryctrl.default_value), + SPA_PROP_INFO_description, SPA_POD_String(queryctrl.name)); + break; + case V4L2_CTRL_TYPE_MENU: + { + struct v4l2_querymenu querymenu; + struct spa_pod_builder_state state; + + spa_pod_builder_push_object(&b, &f[0], SPA_TYPE_OBJECT_PropInfo, SPA_PARAM_PropInfo); + spa_pod_builder_add(&b, + SPA_PROP_INFO_id, SPA_POD_Id(prop_id), + SPA_PROP_INFO_type, SPA_POD_CHOICE_ENUM_Int(1, (int32_t)queryctrl.default_value), + SPA_PROP_INFO_description, SPA_POD_String(queryctrl.name), + 0); + + spa_zero(querymenu); + querymenu.id = queryctrl.id; + + spa_pod_builder_prop(&b, SPA_PROP_INFO_labels, 0); + + spa_pod_builder_get_state(&b, &state); + spa_pod_builder_push_struct(&b, &f[1]); + for (querymenu.index = queryctrl.minimum; + querymenu.index <= queryctrl.maximum; + querymenu.index++) { + if (xioctl(dev->fd, VIDIOC_QUERYMENU, &querymenu) == 0) { + spa_pod_builder_int(&b, querymenu.index); + spa_pod_builder_string(&b, (const char *)querymenu.name); + } + } + if (spa_pod_builder_pop(&b, &f[1]) == NULL) { + spa_log_warn(this->log, "can't create Control '%s' overflow %d", + queryctrl.name, b.state.offset); + spa_pod_builder_reset(&b, &state); + spa_pod_builder_none(&b); + } + param = spa_pod_builder_pop(&b, &f[0]); + break; + } + case V4L2_CTRL_TYPE_INTEGER_MENU: + case V4L2_CTRL_TYPE_BITMASK: + case V4L2_CTRL_TYPE_BUTTON: + case V4L2_CTRL_TYPE_INTEGER64: + case V4L2_CTRL_TYPE_STRING: + default: + goto next; + + } + if (spa_pod_filter(&b, &result.param, param, filter) < 0) + goto next; + + spa_node_emit_result(&this->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result); + + if (++count != num) + goto next; + + enum_end: + res = 0; + spa_v4l2_close(dev); + return res; +} + +static int +spa_v4l2_set_control(struct impl *this, uint32_t id, + const struct spa_pod_prop *prop) +{ + struct port *port = &this->out_ports[0]; + struct spa_v4l2_device *dev = &port->dev; + struct v4l2_control control; + int res; + + spa_zero(control); + control.id = prop_id_to_control(this, prop->key); + if (control.id == SPA_ID_INVALID) + return -ENOENT; + + if ((res = spa_v4l2_open(dev, this->props.device)) < 0) + return res; + + switch (SPA_POD_TYPE(&prop->value)) { + case SPA_TYPE_Bool: + { + bool val; + if ((res = spa_pod_get_bool(&prop->value, &val)) < 0) + goto done; + control.value = val; + break; + } + case SPA_TYPE_Int: + { + int32_t val; + if ((res = spa_pod_get_int(&prop->value, &val)) < 0) + goto done; + control.value = val; + break; + } + default: + res = -EINVAL; + goto done; + } + if (xioctl(dev->fd, VIDIOC_S_CTRL, &control) < 0) { + res = -errno; + goto done; + } + + res = 0; + +done: + spa_v4l2_close(dev); + return res; +} + +static int mmap_read(struct impl *this) +{ + struct port *port = &this->out_ports[0]; + struct spa_v4l2_device *dev = &port->dev; + struct v4l2_buffer buf; + struct buffer *b; + struct spa_data *d; + int64_t pts; + + spa_zero(buf); + buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + buf.memory = port->memtype; + + if (xioctl(dev->fd, VIDIOC_DQBUF, &buf) < 0) + return -errno; + + pts = SPA_TIMEVAL_TO_NSEC(&buf.timestamp); + spa_log_trace(this->log, "v4l2 %p: have output %d", this, buf.index); + + if (this->clock) { + this->clock->nsec = pts; + this->clock->rate = port->rate; + this->clock->position = buf.sequence; + this->clock->duration = 1; + this->clock->delay = 0; + this->clock->rate_diff = 1.0; + this->clock->next_nsec = pts + 1000000000LL / port->rate.denom; + } + + b = &port->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->offset = 0; + b->h->seq = buf.sequence; + b->h->pts = pts; + b->h->dts_offset = 0; + } + + d = b->outbuf->datas; + d[0].chunk->offset = 0; + d[0].chunk->size = buf.bytesused; + d[0].chunk->stride = port->fmt.fmt.pix.bytesperline; + d[0].chunk->flags = 0; + if (buf.flags & V4L2_BUF_FLAG_ERROR) + d[0].chunk->flags |= SPA_CHUNK_FLAG_CORRUPTED; + + spa_list_append(&port->queue, &b->link); + return 0; +} + +static void v4l2_on_fd_events(struct spa_source *source) +{ + struct impl *this = source->data; + struct spa_io_buffers *io; + struct port *port = &this->out_ports[0]; + struct buffer *b; + + if (source->rmask & SPA_IO_ERR) { + struct port *port = &this->out_ports[0]; + spa_log_error(this->log, "'%p' error %08x", this->props.device, source->rmask); + if (port->source.loop) + spa_loop_remove_source(this->data_loop, &port->source); + return; + } + + if (!(source->rmask & SPA_IO_IN)) { + spa_log_warn(this->log, "v4l2 %p: spurious wakeup %d", this, source->rmask); + return; + } + + if (mmap_read(this) < 0) + return; + + if (spa_list_is_empty(&port->queue)) + return; + + io = port->io; + if (io == NULL) { + b = spa_list_first(&port->queue, struct buffer, link); + spa_list_remove(&b->link); + SPA_FLAG_SET(b->flags, BUFFER_FLAG_OUTSTANDING); + spa_v4l2_buffer_recycle(this, b->id); + } + else if (io->status != SPA_STATUS_HAVE_DATA) { + if (io->buffer_id < port->n_buffers) + spa_v4l2_buffer_recycle(this, io->buffer_id); + + b = spa_list_first(&port->queue, struct buffer, link); + spa_list_remove(&b->link); + SPA_FLAG_SET(b->flags, BUFFER_FLAG_OUTSTANDING); + + io->buffer_id = b->id; + io->status = SPA_STATUS_HAVE_DATA; + spa_log_trace(this->log, "v4l2 %p: now queued %d", this, b->id); + } + spa_node_call_ready(&this->callbacks, SPA_STATUS_HAVE_DATA); +} + +static int spa_v4l2_use_buffers(struct impl *this, struct spa_buffer **buffers, uint32_t n_buffers) +{ + struct port *port = &this->out_ports[0]; + struct spa_v4l2_device *dev = &port->dev; + struct v4l2_requestbuffers reqbuf; + unsigned int i; + struct spa_data *d; + + if (n_buffers > 0) { + d = buffers[0]->datas; + + if (d[0].type == SPA_DATA_MemFd || + (d[0].type == SPA_DATA_MemPtr && d[0].data != NULL)) { + port->memtype = V4L2_MEMORY_USERPTR; + } else if (d[0].type == SPA_DATA_DmaBuf) { + port->memtype = V4L2_MEMORY_DMABUF; + } else { + spa_log_error(this->log, "can't use buffers of type %d", d[0].type); + return -EINVAL; + } + } + + spa_zero(reqbuf); + reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + reqbuf.memory = port->memtype; + reqbuf.count = n_buffers; + + if (xioctl(dev->fd, VIDIOC_REQBUFS, &reqbuf) < 0) { + spa_log_error(this->log, "'%s' VIDIOC_REQBUFS %m", this->props.device); + return -errno; + } + spa_log_debug(this->log, "got %d buffers", reqbuf.count); + if (reqbuf.count < n_buffers) { + spa_log_error(this->log, "'%s' can't allocate enough buffers %d < %d", + this->props.device, reqbuf.count, n_buffers); + return -ENOMEM; + } + + for (i = 0; i < reqbuf.count; i++) { + struct buffer *b; + + b = &port->buffers[i]; + b->id = i; + b->outbuf = buffers[i]; + b->flags = BUFFER_FLAG_OUTSTANDING; + b->h = spa_buffer_find_meta_data(buffers[i], SPA_META_Header, sizeof(*b->h)); + + spa_log_debug(this->log, "import buffer %p", buffers[i]); + + if (buffers[i]->n_datas < 1) { + spa_log_error(this->log, "invalid memory on buffer %p", buffers[i]); + return -EINVAL; + } + d = buffers[i]->datas; + + spa_zero(b->v4l2_buffer); + b->v4l2_buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + b->v4l2_buffer.memory = port->memtype; + b->v4l2_buffer.index = i; + + if (port->memtype == V4L2_MEMORY_USERPTR) { + if (d[0].data == NULL) { + void *data; + + data = mmap(NULL, + d[0].maxsize, + PROT_READ | PROT_WRITE, MAP_SHARED, + d[0].fd, + d[0].mapoffset); + if (data == MAP_FAILED) + return -errno; + + b->ptr = data; + SPA_FLAG_SET(b->flags, BUFFER_FLAG_MAPPED); + } + else + b->ptr = d[0].data; + + b->v4l2_buffer.m.userptr = (unsigned long) b->ptr; + b->v4l2_buffer.length = d[0].maxsize; + } + else if (port->memtype == V4L2_MEMORY_DMABUF) { + b->v4l2_buffer.m.fd = d[0].fd; + } + else { + spa_log_error(this->log, "invalid port memory %d", + port->memtype); + return -EIO; + } + + spa_v4l2_buffer_recycle(this, i); + } + port->n_buffers = reqbuf.count; + + return 0; +} + +static int +mmap_init(struct impl *this, + struct spa_buffer **buffers, uint32_t n_buffers) +{ + struct port *port = &this->out_ports[0]; + struct spa_v4l2_device *dev = &port->dev; + struct v4l2_requestbuffers reqbuf; + unsigned int i; + bool use_expbuf = false; + + port->memtype = V4L2_MEMORY_MMAP; + + spa_zero(reqbuf); + reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + reqbuf.memory = port->memtype; + reqbuf.count = n_buffers; + + if (xioctl(dev->fd, VIDIOC_REQBUFS, &reqbuf) < 0) { + spa_log_error(this->log, "'%s' VIDIOC_REQBUFS: %m", this->props.device); + return -errno; + } + + spa_log_debug(this->log, "got %d buffers", reqbuf.count); + + if (reqbuf.count < n_buffers) { + spa_log_error(this->log, "'%s' can't allocate enough buffers (%d < %d)", + this->props.device, reqbuf.count, n_buffers); + return -ENOMEM; + } + + for (i = 0; i < n_buffers; i++) { + struct buffer *b; + struct spa_data *d; + + if (buffers[i]->n_datas < 1) { + spa_log_error(this->log, "invalid buffer data"); + return -EINVAL; + } + + b = &port->buffers[i]; + b->id = i; + b->outbuf = buffers[i]; + b->flags = BUFFER_FLAG_OUTSTANDING; + b->h = spa_buffer_find_meta_data(buffers[i], SPA_META_Header, sizeof(*b->h)); + + spa_zero(b->v4l2_buffer); + b->v4l2_buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + b->v4l2_buffer.memory = port->memtype; + b->v4l2_buffer.index = i; + + if (xioctl(dev->fd, VIDIOC_QUERYBUF, &b->v4l2_buffer) < 0) { + spa_log_error(this->log, "'%s' VIDIOC_QUERYBUF: %m", this->props.device); + return -errno; + } + + if (b->v4l2_buffer.flags & V4L2_BUF_FLAG_QUEUED) { + /* some drivers can give us an already queued buffer. */ + spa_log_warn(this->log, "buffer %d was already queued", i); + n_buffers = i; + break; + } + + d = buffers[i]->datas; + d[0].mapoffset = 0; + d[0].maxsize = b->v4l2_buffer.length; + d[0].chunk->offset = 0; + d[0].chunk->size = 0; + d[0].chunk->stride = port->fmt.fmt.pix.bytesperline; + d[0].chunk->flags = 0; + + spa_log_debug(this->log, "data types %08x", d[0].type); + + if (port->have_expbuf && + d[0].type != SPA_ID_INVALID && + (d[0].type & ((1u << SPA_DATA_DmaBuf)|(1u<<SPA_DATA_MemFd)))) { + 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(dev->fd, VIDIOC_EXPBUF, &expbuf) < 0) { + if (errno == ENOTTY || errno == EINVAL) { + spa_log_debug(this->log, "'%s' VIDIOC_EXPBUF not supported: %m", + this->props.device); + port->have_expbuf = false; + goto fallback; + } + spa_log_error(this->log, "'%s' VIDIOC_EXPBUF: %m", this->props.device); + return -errno; + } + if (d[0].type & (1u<<SPA_DATA_DmaBuf)) + d[0].type = SPA_DATA_DmaBuf; + else + d[0].type = SPA_DATA_MemFd; + d[0].flags = SPA_DATA_FLAG_READABLE; + d[0].fd = expbuf.fd; + d[0].data = NULL; + SPA_FLAG_SET(b->flags, BUFFER_FLAG_ALLOCATED); + spa_log_debug(this->log, "EXPBUF fd:%d", expbuf.fd); + use_expbuf = true; + } else if (d[0].type & (1u << SPA_DATA_MemPtr)) { +fallback: + d[0].type = SPA_DATA_MemPtr; + d[0].flags = SPA_DATA_FLAG_READABLE; + d[0].fd = -1; + d[0].mapoffset = b->v4l2_buffer.m.offset; + d[0].data = mmap(NULL, + b->v4l2_buffer.length, + PROT_READ, MAP_SHARED, + dev->fd, + b->v4l2_buffer.m.offset); + if (d[0].data == MAP_FAILED) { + spa_log_error(this->log, "'%s' mmap: %m", this->props.device); + return -errno; + } + b->ptr = d[0].data; + SPA_FLAG_SET(b->flags, BUFFER_FLAG_MAPPED); + spa_log_debug(this->log, "mmap offset:%u data:%p", d[0].mapoffset, b->ptr); + use_expbuf = false; + } else { + spa_log_error(this->log, "unsupported data type:%08x", d[0].type); + return -ENOTSUP; + } + spa_v4l2_buffer_recycle(this, i); + } + spa_log_info(this->log, "%s: have %u buffers using %s", dev->path, n_buffers, + use_expbuf ? "EXPBUF" : "MMAP"); + + port->n_buffers = n_buffers; + + return 0; +} + +static int userptr_init(struct impl *this) +{ + return -ENOTSUP; +} + +static int read_init(struct impl *this) +{ + return -ENOTSUP; +} + +static int +spa_v4l2_alloc_buffers(struct impl *this, + struct spa_buffer **buffers, + uint32_t n_buffers) +{ + int res; + struct port *port = &this->out_ports[0]; + struct spa_v4l2_device *dev = &port->dev; + + if (port->n_buffers > 0) + return -EIO; + + if (dev->cap.capabilities & V4L2_CAP_STREAMING) { + if ((res = mmap_init(this, buffers, n_buffers)) < 0) + if ((res = userptr_init(this)) < 0) + return res; + } else if (dev->cap.capabilities & V4L2_CAP_READWRITE) { + if ((res = read_init(this)) < 0) + return res; + } else { + spa_log_error(this->log, "invalid capabilities %08x", + dev->cap.capabilities); + return -EIO; + } + + return 0; +} + +static int spa_v4l2_stream_on(struct impl *this) +{ + struct port *port = &this->out_ports[0]; + struct spa_v4l2_device *dev = &port->dev; + enum v4l2_buf_type type; + + if (dev->fd == -1) + return -EIO; + + if (!dev->have_format) + return -EIO; + + if (dev->active) + return 0; + + spa_log_debug(this->log, "starting"); + + type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + if (xioctl(dev->fd, VIDIOC_STREAMON, &type) < 0) { + spa_log_error(this->log, "'%s' VIDIOC_STREAMON: %m", this->props.device); + return -errno; + } + + port->source.func = v4l2_on_fd_events; + port->source.data = this; + port->source.fd = dev->fd; + port->source.mask = SPA_IO_IN | SPA_IO_ERR; + port->source.rmask = 0; + spa_loop_add_source(this->data_loop, &port->source); + + dev->active = true; + + return 0; +} + +static int do_remove_source(struct spa_loop *loop, + bool async, + uint32_t seq, + const void *data, + size_t size, + void *user_data) +{ + struct port *port = user_data; + if (port->source.loop) + spa_loop_remove_source(loop, &port->source); + return 0; +} + +static int spa_v4l2_stream_off(struct impl *this) +{ + struct port *port = &this->out_ports[0]; + struct spa_v4l2_device *dev = &port->dev; + enum v4l2_buf_type type; + uint32_t i; + + if (!dev->active) + return 0; + + if (dev->fd == -1) + return -EIO; + + spa_log_debug(this->log, "stopping"); + + spa_loop_invoke(this->data_loop, do_remove_source, 0, NULL, 0, true, port); + + type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + if (xioctl(dev->fd, VIDIOC_STREAMOFF, &type) < 0) { + spa_log_error(this->log, "'%s' VIDIOC_STREAMOFF: %m", this->props.device); + return -errno; + } + for (i = 0; i < port->n_buffers; i++) { + struct buffer *b; + + b = &port->buffers[i]; + if (!SPA_FLAG_IS_SET(b->flags, BUFFER_FLAG_OUTSTANDING)) { + if (xioctl(dev->fd, VIDIOC_QBUF, &b->v4l2_buffer) < 0) + spa_log_warn(this->log, "VIDIOC_QBUF: %s", strerror(errno)); + } + } + spa_list_init(&port->queue); + dev->active = false; + + return 0; +} |