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pipewire/spa/plugins/v4l2/v4l2-utils.c
Wim Taymans d26aecfef2 More type fixes 
Param ids and IO ids are now simple enums.
Move some type info in one place, delete some type-info files
Fix type debug
Make audio layout an enum
Mark more enums as enums in types so they show us with their names in
the debug.
2018-08-25 12:08:29 +02:00

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/* Spa
* Copyright (C) 2017 Wim Taymans <wim.taymans@gmail.com>
*
* 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 <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>
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 *port = &this->out_ports[0];
struct stat st;
struct props *props = &this->props;
int err;
if (port->opened)
return 0;
if (props->device[0] == '\0') {
spa_log_error(port->log, "v4l2: Device property not set");
return -EIO;
}
spa_log_info(port->log, "v4l2: Playback device is '%s'", props->device);
if (stat(props->device, &st) < 0) {
err = errno;
spa_log_error(port->log, "v4l2: Cannot identify '%s': %d, %s",
props->device, err, strerror(err));
return -err;
}
if (!S_ISCHR(st.st_mode)) {
spa_log_error(port->log, "v4l2: %s is no device", props->device);
return -ENODEV;
}
port->fd = open(props->device, O_RDWR | O_NONBLOCK, 0);
if (port->fd == -1) {
err = errno;
spa_log_error(port->log, "v4l2: Cannot open '%s': %d, %s",
props->device, err, strerror(err));
return -err;
}
if (xioctl(port->fd, VIDIOC_QUERYCAP, &port->cap) < 0) {
err = errno;
spa_log_error(port->log, "QUERYCAP: %m");
return -err;
}
if ((port->cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0 ||
((port->cap.capabilities & V4L2_CAP_DEVICE_CAPS) &&
(port->cap.device_caps & V4L2_CAP_VIDEO_CAPTURE) == 0)) {
spa_log_error(port->log, "v4l2: %s is no video capture device", props->device);
close(port->fd);
port->fd = -1;
return -ENODEV;
}
port->source.func = v4l2_on_fd_events;
port->source.data = this;
port->source.fd = port->fd;
port->source.mask = SPA_IO_IN | SPA_IO_ERR;
port->source.rmask = 0;
port->opened = true;
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];
int err;
if (!SPA_FLAG_CHECK(b->flags, BUFFER_FLAG_OUTSTANDING))
return 0;
SPA_FLAG_UNSET(b->flags, BUFFER_FLAG_OUTSTANDING);
spa_log_trace(port->log, "v4l2 %p: recycle buffer %d", this, buffer_id);
if (xioctl(port->fd, VIDIOC_QBUF, &b->v4l2_buffer) < 0) {
err = errno;
spa_log_error(port->log, "VIDIOC_QBUF: %m");
return -err;
}
return 0;
}
static int spa_v4l2_clear_buffers(struct impl *this)
{
struct port *port = &this->out_ports[0];
struct v4l2_requestbuffers reqbuf;
int 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_CHECK(b->flags, BUFFER_FLAG_OUTSTANDING)) {
spa_log_info(port->log, "v4l2: queueing outstanding buffer %p", b);
spa_v4l2_buffer_recycle(this, i);
}
if (SPA_FLAG_CHECK(b->flags, BUFFER_FLAG_MAPPED)) {
munmap(SPA_MEMBER(b->ptr, -d[0].mapoffset, void),
d[0].maxsize - d[0].mapoffset);
}
if (SPA_FLAG_CHECK(b->flags, BUFFER_FLAG_ALLOCATED)) {
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->fd, VIDIOC_REQBUFS, &reqbuf) < 0) {
spa_log_warn(port->log, "VIDIOC_REQBUFS: %m");
}
port->n_buffers = 0;
return 0;
}
static int spa_v4l2_close(struct impl *this)
{
struct port *port = &this->out_ports[0];
if (!port->opened)
return 0;
if (port->have_format)
return 0;
spa_log_info(port->log, "v4l2: close");
if (close(port->fd))
spa_log_warn(port->log, "close: %m");
port->fd = -1;
port->opened = false;
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, 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(uint32_t type,
uint32_t subtype,
uint32_t format,
int startidx)
{
int i;
for (i = startidx; i < SPA_N_ELEMENTS(format_info); i++) {
if ((format_info[i].media_type == type) &&
(format_info[i].media_subtype == subtype) &&
(format == 0 || format_info[i].format == format))
return &format_info[i];
}
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) {
struct spa_pod_prop *p;
uint32_t n_values;
const uint32_t *values;
if (!(p = spa_pod_find_prop(filter, SPA_FORMAT_VIDEO_format)))
return SPA_VIDEO_FORMAT_UNKNOWN;
if (p->body.value.type != SPA_ID_Enum)
return SPA_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 = 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,
uint32_t *index,
const struct spa_pod *filter,
struct spa_pod **result,
struct spa_pod_builder *builder)
{
struct port *port = &this->out_ports[0];
int res, n_fractions;
const struct format_info *info;
struct spa_pod_prop *prop;
uint32_t filter_media_type, filter_media_subtype, video_format;
if ((res = spa_v4l2_open(this)) < 0)
return res;
if (*index == 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) {
spa_pod_object_parse(filter,
"I", &filter_media_type,
"I", &filter_media_subtype);
}
if (false) {
next_fmtdesc:
port->fmtdesc.index++;
port->next_fmtdesc = true;
}
while (port->next_fmtdesc) {
if (filter) {
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;
} else {
if ((res = xioctl(port->fd, VIDIOC_ENUM_FMT, &port->fmtdesc)) < 0) {
res = -errno;
if (errno != EINVAL)
spa_log_error(port->log, "VIDIOC_ENUM_FMT: %m");
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) {
struct spa_pod_prop *p;
/* check if we have a fixed frame size */
if (!(p = spa_pod_find_prop(filter, SPA_FORMAT_VIDEO_size)))
goto do_frmsize;
if (p->body.value.type != SPA_ID_Rectangle) {
goto enum_end;
}
if (!(p->body.flags & SPA_POD_PROP_FLAG_UNSET)) {
const struct spa_rectangle *values =
SPA_POD_BODY_CONST(&p->body.value);
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(port->fd, VIDIOC_ENUM_FRAMESIZES, &port->frmsize)) < 0) {
if (errno == EINVAL)
goto next_fmtdesc;
res = -errno;
spa_log_error(port->log, "VIDIOC_ENUM_FRAMESIZES: %m");
goto exit;
}
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_pod_find_prop(filter, SPA_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(&port->frmsize, &values[1], &values[2], &step))
goto have_size;
} else if (range == SPA_POD_PROP_RANGE_STEP && n_values > 3) {
if (filter_framesize(&port->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(&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_push_object(builder, SPA_PARAM_EnumFormat, SPA_ID_OBJECT_Format);
spa_pod_builder_add(builder,
"I", info->media_type,
"I", info->media_subtype, 0);
if (info->media_subtype == SPA_MEDIA_SUBTYPE_raw) {
spa_pod_builder_add(builder,
":", SPA_FORMAT_VIDEO_format, "I", info->format, 0);
}
spa_pod_builder_add(builder,
":", SPA_FORMAT_VIDEO_size, "R", &SPA_RECTANGLE(port->frmsize.discrete.width,
port->frmsize.discrete.height), 0);
prop = spa_pod_builder_deref(builder,
spa_pod_builder_push_prop(builder, SPA_FORMAT_VIDEO_framerate,
SPA_POD_PROP_RANGE_NONE | SPA_POD_PROP_FLAG_UNSET));
n_fractions = 0;
port->frmival.index = 0;
while (true) {
if ((res = xioctl(port->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(port->log, "VIDIOC_ENUM_FRAMEINTERVALS: %m");
goto exit;
}
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_pod_find_prop(filter, SPA_FORMAT_VIDEO_framerate)))
goto have_framerate;
if (p->body.value.type != SPA_ID_Fraction)
goto 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(&port->frmival, &values[0], &values[0], &step))
goto have_framerate;
} else if (range == SPA_POD_PROP_RANGE_MIN_MAX && n_values > 2) {
if (filter_framerate(&port->frmival, &values[1], &values[2], &step))
goto have_framerate;
} else if (range == SPA_POD_PROP_RANGE_STEP && n_values > 3) {
if (filter_framerate(&port->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(&port->frmival, &values[i], &values[i], &step))
goto have_framerate;
}
}
port->frmival.index++;
continue;
}
have_framerate:
if (port->frmival.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
prop->body.flags |= SPA_POD_PROP_RANGE_ENUM;
if (n_fractions == 0)
spa_pod_builder_fraction(builder,
port->frmival.discrete.denominator,
port->frmival.discrete.numerator);
spa_pod_builder_fraction(builder,
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(builder, 25, 1);
spa_pod_builder_fraction(builder,
port->frmival.stepwise.min.denominator,
port->frmival.stepwise.min.numerator);
spa_pod_builder_fraction(builder,
port->frmival.stepwise.max.denominator,
port->frmival.stepwise.max.numerator);
if (port->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(builder,
port->frmival.stepwise.step.denominator,
port->frmival.stepwise.step.numerator);
}
port->frmsize.index++;
port->next_frmsize = true;
break;
}
n_fractions++;
}
if (n_fractions <= 1) {
prop->body.flags &= ~(SPA_POD_PROP_RANGE_MASK | SPA_POD_PROP_FLAG_UNSET);
}
spa_pod_builder_pop(builder);
*result = spa_pod_builder_pop(builder);
(*index)++;
res = 1;
exit:
spa_v4l2_close(this);
return res;
enum_end:
res = 0;
goto exit;
}
static int spa_v4l2_set_format(struct impl *this, struct spa_video_info *format, bool try_only)
{
struct port *port = &this->out_ports[0];
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;
spa_zero(fmt);
spa_zero(streamparm);
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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(port->log, "v4l2: 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_info(port->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 ((res = spa_v4l2_open(this)) < 0)
return res;
cmd = try_only ? VIDIOC_TRY_FMT : VIDIOC_S_FMT;
if (xioctl(port->fd, cmd, &fmt) < 0) {
res = -errno;
spa_log_error(port->log, "VIDIOC_S_FMT: %m");
return res;
}
/* some cheap USB cam's won't accept any change */
if (xioctl(port->fd, VIDIOC_S_PARM, &streamparm) < 0)
spa_log_warn(port->log, "VIDIOC_S_PARM: %m");
spa_log_info(port->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 -EINVAL;
if (try_only)
return 0;
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.flags = (port->export_buf ? SPA_PORT_INFO_FLAG_CAN_ALLOC_BUFFERS : 0) |
SPA_PORT_INFO_FLAG_CAN_USE_BUFFERS |
SPA_PORT_INFO_FLAG_LIVE |
SPA_PORT_INFO_FLAG_PHYSICAL |
SPA_PORT_INFO_FLAG_TERMINAL;
port->info.rate = streamparm.parm.capture.timeperframe.denominator;
return 0;
}
static int query_ext_ctrl_ioctl(struct port *port, struct v4l2_query_ext_ctrl *qctrl)
{
struct v4l2_queryctrl qc;
int res;
if (port->have_query_ext_ctrl) {
res = ioctl(port->fd, VIDIOC_QUERY_EXT_CTRL, qctrl);
if (errno != ENOTTY)
return res;
port->have_query_ext_ctrl = false;
}
qc.id = qctrl->id;
res = ioctl(port->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 uint32_t control_to_prop_id(struct impl *impl, uint32_t control_id)
{
switch (control_id) {
case V4L2_CID_BRIGHTNESS:
return SPA_PROP_brightness;
case V4L2_CID_CONTRAST:
return SPA_PROP_contrast;
case V4L2_CID_SATURATION:
return SPA_PROP_saturation;
case V4L2_CID_HUE:
return SPA_PROP_hue;
case V4L2_CID_GAMMA:
return SPA_PROP_gamma;
case V4L2_CID_EXPOSURE:
return SPA_PROP_exposure;
case V4L2_CID_GAIN:
return SPA_PROP_gain;
case V4L2_CID_SHARPNESS:
return SPA_PROP_sharpness;
default:
return SPA_PROP_unknown;
}
}
static int
spa_v4l2_enum_controls(struct impl *this,
uint32_t *index,
const struct spa_pod *filter,
struct spa_pod **result,
struct spa_pod_builder *builder)
{
struct port *port = &this->out_ports[0];
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;
if ((res = spa_v4l2_open(this)) < 0)
return res;
next:
spa_zero(queryctrl);
if (*index == 0) {
*index |= next_fl;
port->n_controls = 0;
}
queryctrl.id = *index;
spa_log_debug(port->log, "test control %08x", queryctrl.id);
if (query_ext_ctrl_ioctl(port, &queryctrl) != 0) {
if (errno == EINVAL) {
if (queryctrl.id != next_fl)
goto enum_end;
if (*index & next_fl)
*index = V4L2_CID_USER_BASE;
else if (*index >= V4L2_CID_USER_BASE && *index < V4L2_CID_LASTP1)
(*index)++;
else if (*index >= V4L2_CID_LASTP1)
*index = V4L2_CID_PRIVATE_BASE;
else
goto enum_end;
goto next;
}
res = -errno;
spa_log_error(port->log, "VIDIOC_QUERYCTRL: %m");
return res;
}
if (*index & next_fl)
(*index) = queryctrl.id | next_fl;
else
(*index)++;
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(port->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_object(&b,
SPA_PARAM_PropInfo, SPA_ID_OBJECT_PropInfo,
":", SPA_PROP_INFO_id, "I", prop_id,
":", SPA_PROP_INFO_type, "isu", queryctrl.default_value,
SPA_POD_PROP_STEP(queryctrl.minimum,
queryctrl.maximum,
queryctrl.step),
":", SPA_PROP_INFO_name, "s", queryctrl.name);
break;
case V4L2_CTRL_TYPE_BOOLEAN:
param = spa_pod_builder_object(&b,
SPA_PARAM_PropInfo, SPA_ID_OBJECT_PropInfo,
":", SPA_PROP_INFO_id, "I", prop_id,
":", SPA_PROP_INFO_type, "b-u", queryctrl.default_value,
":", SPA_PROP_INFO_name, "s", queryctrl.name);
break;
case V4L2_CTRL_TYPE_MENU:
{
struct v4l2_querymenu querymenu;
spa_pod_builder_push_object(&b, SPA_PARAM_PropInfo, SPA_ID_OBJECT_PropInfo);
spa_pod_builder_add(&b,
":", SPA_PROP_INFO_id, "I", prop_id,
":", SPA_PROP_INFO_type, "i-u", queryctrl.default_value,
":", SPA_PROP_INFO_name, "s", queryctrl.name,
NULL);
spa_zero(querymenu);
querymenu.id = queryctrl.id;
spa_pod_builder_push_prop(&b, SPA_PROP_INFO_labels, 0);
spa_pod_builder_push_struct(&b);
for (querymenu.index = queryctrl.minimum;
querymenu.index <= queryctrl.maximum;
querymenu.index++) {
if (ioctl(port->fd, VIDIOC_QUERYMENU, &querymenu) == 0) {
spa_pod_builder_int(&b, querymenu.index);
spa_pod_builder_string(&b, (const char *)querymenu.name);
}
}
spa_pod_builder_pop(&b);
spa_pod_builder_pop(&b);
param = spa_pod_builder_pop(&b);
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(builder, result, param, filter) < 0)
goto next;
res = 1;
exit:
spa_v4l2_close(this);
return res;
enum_end:
res = 0;
goto exit;
}
static int mmap_read(struct impl *this)
{
struct port *port = &this->out_ports[0];
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(port->fd, VIDIOC_DQBUF, &buf) < 0)
return -errno;
pts = SPA_TIMEVAL_TO_TIME(&buf.timestamp);
if (port->clock) {
port->clock->nsec = pts;
port->clock->rate = port->rate;
port->clock->position = buf.sequence;
}
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->seq = buf.sequence;
b->h->pts = buf.sequence * 1000000000LL / port->rate.denom;
}
d = b->outbuf->datas;
d[0].chunk->offset = 0;
d[0].chunk->size = buf.bytesused;
d[0].chunk->stride = port->fmt.fmt.pix.bytesperline;
SPA_FLAG_SET(b->flags, BUFFER_FLAG_OUTSTANDING);
spa_list_append(&port->queue, &b->link);
spa_log_trace(port->log, "v4l2 %p: have output %d", this, buf.index);
this->callbacks->process(this->callbacks_data, SPA_STATUS_HAVE_BUFFER);
return 0;
}
static void v4l2_on_fd_events(struct spa_source *source)
{
struct impl *this = source->data;
if (source->rmask & SPA_IO_ERR) {
struct port *port = &this->out_ports[0];
spa_log_error(this->log, "v4l2 %p: error %08x", this, source->rmask);
if (port->source.loop)
spa_loop_remove_source(port->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;
}
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 v4l2_requestbuffers reqbuf;
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(port->log, "v4l2: 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(port->fd, VIDIOC_REQBUFS, &reqbuf) < 0) {
spa_log_error(port->log, "v4l2: VIDIOC_REQBUFS %m");
return -errno;
}
spa_log_info(port->log, "v4l2: got %d buffers", reqbuf.count);
if (reqbuf.count < n_buffers) {
spa_log_error(port->log, "v4l2: can't allocate enough buffers");
return -ENOMEM;
}
for (i = 0; i < reqbuf.count; i++) {
struct buffer *b;
b = &port->buffers[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_info(port->log, "v4l2: import buffer %p", buffers[i]);
if (buffers[i]->n_datas < 1) {
spa_log_error(port->log, "v4l2: 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 + d[0].mapoffset,
PROT_READ | PROT_WRITE, MAP_SHARED,
d[0].fd,
0);
if (data == MAP_FAILED)
return -errno;
b->ptr = SPA_MEMBER(data, d[0].mapoffset, void);
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
return -EIO;
spa_v4l2_buffer_recycle(this, buffers[i]->id);
}
port->n_buffers = reqbuf.count;
return 0;
}
static int
mmap_init(struct impl *this,
struct spa_pod **params,
uint32_t n_params,
struct spa_buffer **buffers,
uint32_t *n_buffers)
{
struct port *port = &this->out_ports[0];
struct v4l2_requestbuffers reqbuf;
int i;
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(port->fd, VIDIOC_REQBUFS, &reqbuf) < 0) {
spa_log_error(port->log, "VIDIOC_REQBUFS: %m");
return -errno;
}
spa_log_info(port->log, "v4l2: got %d buffers", reqbuf.count);
*n_buffers = reqbuf.count;
if (reqbuf.count < 2) {
spa_log_error(port->log, "v4l2: can't allocate enough buffers");
return -ENOMEM;
}
if (port->export_buf)
spa_log_info(port->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(port->log, "v4l2: invalid buffer data");
return -EINVAL;
}
b = &port->buffers[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(port->fd, VIDIOC_QUERYBUF, &b->v4l2_buffer) < 0) {
spa_log_error(port->log, "VIDIOC_QUERYBUF: %m");
return -errno;
}
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;
if (port->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(port->fd, VIDIOC_EXPBUF, &expbuf) < 0) {
spa_log_error(port->log, "VIDIOC_EXPBUF: %m");
continue;
}
d[0].type = SPA_DATA_DmaBuf;
d[0].fd = expbuf.fd;
d[0].data = NULL;
SPA_FLAG_SET(b->flags, BUFFER_FLAG_ALLOCATED);
} else {
d[0].type = SPA_DATA_MemPtr;
d[0].fd = -1;
d[0].data = mmap(NULL,
b->v4l2_buffer.length,
PROT_READ, MAP_SHARED,
port->fd,
b->v4l2_buffer.m.offset);
if (d[0].data == MAP_FAILED) {
spa_log_error(port->log, "mmap: %m");
continue;
}
b->ptr = d[0].data;
SPA_FLAG_SET(b->flags, BUFFER_FLAG_MAPPED);
}
spa_v4l2_buffer_recycle(this, i);
}
port->n_buffers = reqbuf.count;
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_pod **params,
uint32_t n_params,
struct spa_buffer **buffers,
uint32_t *n_buffers)
{
int res;
struct port *port = &this->out_ports[0];
if (port->n_buffers > 0)
return -EIO;
if (port->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 (port->cap.capabilities & V4L2_CAP_READWRITE) {
if ((res = read_init(this)) < 0)
return res;
} else
return -EIO;
return 0;
}
static int spa_v4l2_stream_on(struct impl *this)
{
struct port *port = &this->out_ports[0];
enum v4l2_buf_type type;
if (!port->opened)
return -EIO;
if (port->started)
return 0;
spa_log_debug(this->log, "starting");
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (xioctl(port->fd, VIDIOC_STREAMON, &type) < 0) {
spa_log_error(this->log, "VIDIOC_STREAMON: %m");
return -errno;
}
spa_loop_add_source(port->data_loop, &port->source);
port->started = 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(port->data_loop, &port->source);
return 0;
}
static int spa_v4l2_stream_off(struct impl *this)
{
struct port *port = &this->out_ports[0];
enum v4l2_buf_type type;
int i;
if (!port->opened)
return -EIO;
if (!port->started)
return 0;
spa_log_debug(this->log, "stopping");
spa_loop_invoke(port->data_loop, do_remove_source, 0, NULL, 0, true, port);
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (xioctl(port->fd, VIDIOC_STREAMOFF, &type) < 0) {
spa_log_error(this->log, "VIDIOC_STREAMOFF: %m");
return -errno;
}
for (i = 0; i < port->n_buffers; i++) {
struct buffer *b;
b = &port->buffers[i];
if (!SPA_FLAG_CHECK(b->flags, BUFFER_FLAG_OUTSTANDING)) {
if (xioctl(port->fd, VIDIOC_QBUF, &b->v4l2_buffer) < 0)
spa_log_warn(this->log, "VIDIOC_QBUF: %s", strerror(errno));
}
}
spa_list_init(&port->queue);
port->started = false;
return 0;
}
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