diff options
Diffstat (limited to 'sys/v4l2/v4l2src_calls.c')
-rw-r--r-- | sys/v4l2/v4l2src_calls.c | 1320 |
1 files changed, 53 insertions, 1267 deletions
diff --git a/sys/v4l2/v4l2src_calls.c b/sys/v4l2/v4l2src_calls.c index 3dd6e0e6..75ed1dba 100644 --- a/sys/v4l2/v4l2src_calls.c +++ b/sys/v4l2/v4l2src_calls.c @@ -43,6 +43,9 @@ #endif #include "gstv4l2tuner.h" +#include "gstv4l2bufferpool.h" + +#include "gst/gst-i18n-plugin.h" GST_DEBUG_CATEGORY_EXTERN (v4l2src_debug); #define GST_CAT_DEFAULT v4l2src_debug @@ -57,299 +60,17 @@ GST_DEBUG_CATEGORY_EXTERN (v4l2src_debug); #endif -#define GST_TYPE_V4L2_BUFFER (gst_v4l2_buffer_get_type()) -#define GST_IS_V4L2_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER)) -#define GST_V4L2_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER, GstV4l2Buffer)) - -static GstBufferClass *v4l2buffer_parent_class = NULL; - /* Local functions */ -static gboolean -gst_v4l2src_get_nearest_size (GstV4l2Src * v4l2src, guint32 pixelformat, - gint * width, gint * height); -static void gst_v4l2_buffer_pool_destroy (GstV4l2BufferPool * pool); - -static void -gst_v4l2_buffer_finalize (GstV4l2Buffer * buffer) -{ - GstV4l2BufferPool *pool; - gboolean resuscitated = FALSE; - gint index; - - pool = buffer->pool; - - index = buffer->vbuffer.index; - - GST_LOG ("finalizing buffer %p %d", buffer, index); - - g_mutex_lock (pool->lock); - if (GST_BUFFER_SIZE (buffer) != 0) - /* BUFFER_SIZE is only set if the frame was dequeued */ - pool->num_live_buffers--; - - if (pool->running) { - if (v4l2_ioctl (pool->video_fd, VIDIOC_QBUF, &buffer->vbuffer) < 0) { - GST_WARNING ("could not requeue buffer %p %d", buffer, index); - } else { - /* FIXME: check that the caps didn't change */ - GST_LOG ("reviving buffer %p, %d", buffer, index); - gst_buffer_ref (GST_BUFFER (buffer)); - GST_BUFFER_SIZE (buffer) = 0; - pool->buffers[index] = buffer; - resuscitated = TRUE; - } - } else { - GST_LOG ("the pool is shutting down"); - } - g_mutex_unlock (pool->lock); - - if (!resuscitated) { - GST_LOG ("buffer %p not recovered, unmapping", buffer); - gst_mini_object_unref (GST_MINI_OBJECT (pool)); - v4l2_munmap ((void *) GST_BUFFER_DATA (buffer), buffer->vbuffer.length); - - GST_MINI_OBJECT_CLASS (v4l2buffer_parent_class)->finalize (GST_MINI_OBJECT - (buffer)); - } -} - -static void -gst_v4l2_buffer_class_init (gpointer g_class, gpointer class_data) -{ - GstMiniObjectClass *mini_object_class = GST_MINI_OBJECT_CLASS (g_class); - - v4l2buffer_parent_class = g_type_class_peek_parent (g_class); - - mini_object_class->finalize = (GstMiniObjectFinalizeFunction) - gst_v4l2_buffer_finalize; -} - -static GType -gst_v4l2_buffer_get_type (void) -{ - static GType _gst_v4l2_buffer_type; - - if (G_UNLIKELY (_gst_v4l2_buffer_type == 0)) { - static const GTypeInfo v4l2_buffer_info = { - sizeof (GstBufferClass), - NULL, - NULL, - gst_v4l2_buffer_class_init, - NULL, - NULL, - sizeof (GstV4l2Buffer), - 0, - NULL, - NULL - }; - _gst_v4l2_buffer_type = g_type_register_static (GST_TYPE_BUFFER, - "GstV4l2Buffer", &v4l2_buffer_info, 0); - } - return _gst_v4l2_buffer_type; -} - -static GstV4l2Buffer * -gst_v4l2_buffer_new (GstV4l2BufferPool * pool, guint index, GstCaps * caps) -{ - GstV4l2Buffer *ret; - guint8 *data; - - ret = (GstV4l2Buffer *) gst_mini_object_new (GST_TYPE_V4L2_BUFFER); - - GST_LOG ("creating buffer %u, %p in pool %p", index, ret, pool); - - ret->pool = - (GstV4l2BufferPool *) gst_mini_object_ref (GST_MINI_OBJECT (pool)); - - ret->vbuffer.index = index; - ret->vbuffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - ret->vbuffer.memory = V4L2_MEMORY_MMAP; - - if (v4l2_ioctl (pool->video_fd, VIDIOC_QUERYBUF, &ret->vbuffer) < 0) - goto querybuf_failed; - - GST_LOG (" index: %u", ret->vbuffer.index); - GST_LOG (" type: %d", ret->vbuffer.type); - GST_LOG (" bytesused: %u", ret->vbuffer.bytesused); - GST_LOG (" flags: %08x", ret->vbuffer.flags); - GST_LOG (" field: %d", ret->vbuffer.field); - GST_LOG (" memory: %d", ret->vbuffer.memory); - if (ret->vbuffer.memory == V4L2_MEMORY_MMAP) - GST_LOG (" MMAP offset: %u", ret->vbuffer.m.offset); - GST_LOG (" length: %u", ret->vbuffer.length); - GST_LOG (" input: %u", ret->vbuffer.input); - - data = (guint8 *) v4l2_mmap (0, ret->vbuffer.length, - PROT_READ | PROT_WRITE, MAP_SHARED, pool->video_fd, - ret->vbuffer.m.offset); - - if (data == MAP_FAILED) - goto mmap_failed; - - GST_BUFFER_DATA (ret) = data; - GST_BUFFER_SIZE (ret) = ret->vbuffer.length; - - GST_BUFFER_FLAG_SET (ret, GST_BUFFER_FLAG_READONLY); - - gst_buffer_set_caps (GST_BUFFER (ret), caps); - - return ret; - - /* ERRORS */ -querybuf_failed: - { - gint errnosave = errno; - - GST_WARNING ("Failed QUERYBUF: %s", g_strerror (errnosave)); - gst_buffer_unref (GST_BUFFER (ret)); - errno = errnosave; - return NULL; - } -mmap_failed: - { - gint errnosave = errno; - - GST_WARNING ("Failed to mmap: %s", g_strerror (errnosave)); - gst_buffer_unref (GST_BUFFER (ret)); - errno = errnosave; - return NULL; - } -} - -#define GST_TYPE_V4L2_BUFFER_POOL (gst_v4l2_buffer_pool_get_type()) -#define GST_IS_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER_POOL)) -#define GST_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER_POOL, GstV4l2BufferPool)) - -static GstMiniObjectClass *buffer_pool_parent_class = NULL; - -static void -gst_v4l2_buffer_pool_finalize (GstV4l2BufferPool * pool) -{ - g_mutex_free (pool->lock); - pool->lock = NULL; - - if (pool->video_fd >= 0) - v4l2_close (pool->video_fd); - - if (pool->buffers) { - g_free (pool->buffers); - pool->buffers = NULL; - } - - GST_MINI_OBJECT_CLASS (buffer_pool_parent_class)->finalize (GST_MINI_OBJECT - (pool)); -} - -static void -gst_v4l2_buffer_pool_init (GstV4l2BufferPool * pool, gpointer g_class) -{ - pool->lock = g_mutex_new (); - pool->running = FALSE; - pool->num_live_buffers = 0; -} - -static void -gst_v4l2_buffer_pool_class_init (gpointer g_class, gpointer class_data) -{ - GstMiniObjectClass *mini_object_class = GST_MINI_OBJECT_CLASS (g_class); - - buffer_pool_parent_class = g_type_class_peek_parent (g_class); - - mini_object_class->finalize = (GstMiniObjectFinalizeFunction) - gst_v4l2_buffer_pool_finalize; -} - -static GType -gst_v4l2_buffer_pool_get_type (void) -{ - static GType _gst_v4l2_buffer_pool_type; - - if (G_UNLIKELY (_gst_v4l2_buffer_pool_type == 0)) { - static const GTypeInfo v4l2_buffer_pool_info = { - sizeof (GstBufferClass), - NULL, - NULL, - gst_v4l2_buffer_pool_class_init, - NULL, - NULL, - sizeof (GstV4l2BufferPool), - 0, - (GInstanceInitFunc) gst_v4l2_buffer_pool_init, - NULL - }; - _gst_v4l2_buffer_pool_type = g_type_register_static (GST_TYPE_MINI_OBJECT, - "GstV4l2BufferPool", &v4l2_buffer_pool_info, 0); - } - return _gst_v4l2_buffer_pool_type; -} - -static GstV4l2BufferPool * -gst_v4l2_buffer_pool_new (GstV4l2Src * v4l2src, gint fd, gint num_buffers, - GstCaps * caps) -{ - GstV4l2BufferPool *pool; - gint n; - - pool = (GstV4l2BufferPool *) gst_mini_object_new (GST_TYPE_V4L2_BUFFER_POOL); - - pool->video_fd = v4l2_dup (fd); - if (pool->video_fd < 0) - goto dup_failed; - - pool->buffer_count = num_buffers; - pool->buffers = g_new0 (GstV4l2Buffer *, num_buffers); - - for (n = 0; n < num_buffers; n++) { - pool->buffers[n] = gst_v4l2_buffer_new (pool, n, caps); - if (!pool->buffers[n]) - goto buffer_new_failed; - } - - return pool; - - /* ERRORS */ -dup_failed: - { - gint errnosave = errno; - - gst_mini_object_unref (GST_MINI_OBJECT (pool)); - - errno = errnosave; - - return NULL; - } -buffer_new_failed: - { - gint errnosave = errno; - - gst_v4l2_buffer_pool_destroy (pool); - - errno = errnosave; - - return NULL; - } -} static gboolean -gst_v4l2_buffer_pool_activate (GstV4l2BufferPool * pool, GstV4l2Src * v4l2src) +gst_v4l2src_buffer_pool_activate (GstV4l2BufferPool * pool, + GstV4l2Src * v4l2src) { - gint n; + GstV4l2Buffer *buf; - g_mutex_lock (pool->lock); - - for (n = 0; n < pool->buffer_count; n++) { - struct v4l2_buffer *buf; - - buf = &pool->buffers[n]->vbuffer; - - GST_LOG ("enqueue pool buffer %d", n); - - if (v4l2_ioctl (pool->video_fd, VIDIOC_QBUF, buf) < 0) + while ((buf = gst_v4l2_buffer_pool_get (pool, FALSE)) != NULL) + if (!gst_v4l2_buffer_pool_qbuf (pool, buf)) goto queue_failed; - } - pool->running = TRUE; - - g_mutex_unlock (pool->lock); return TRUE; @@ -360,624 +81,11 @@ queue_failed: (_("Could not enqueue buffers in device '%s'."), v4l2src->v4l2object->videodev), ("enqueing buffer %d/%d failed: %s", - n, v4l2src->num_buffers, g_strerror (errno))); - g_mutex_unlock (pool->lock); + buf->vbuffer.index, v4l2src->num_buffers, g_strerror (errno))); return FALSE; } } -static void -gst_v4l2_buffer_pool_destroy (GstV4l2BufferPool * pool) -{ - gint n; - - g_mutex_lock (pool->lock); - pool->running = FALSE; - g_mutex_unlock (pool->lock); - - GST_DEBUG ("destroy pool"); - - /* after this point, no more buffers will be queued or dequeued; no buffer - * from pool->buffers that is NULL will be set to a buffer, and no buffer that - * is not NULL will be pushed out. */ - - /* miniobjects have no dispose, so they can't break ref-cycles, as buffers ref - * the pool, we need to unref the buffer to properly finalize te pool */ - for (n = 0; n < pool->buffer_count; n++) { - GstBuffer *buf; - - g_mutex_lock (pool->lock); - buf = GST_BUFFER (pool->buffers[n]); - g_mutex_unlock (pool->lock); - - if (buf) - /* we own the ref if the buffer is in pool->buffers; drop it. */ - gst_buffer_unref (buf); - } - - gst_mini_object_unref (GST_MINI_OBJECT (pool)); -} - -/* complete made up ranking, the values themselves are meaningless */ -#define YUV_BASE_RANK 1000 -#define JPEG_BASE_RANK 500 -#define DV_BASE_RANK 200 -#define RGB_BASE_RANK 100 -#define YUV_ODD_BASE_RANK 50 -#define RGB_ODD_BASE_RANK 25 -#define BAYER_BASE_RANK 15 -#define S910_BASE_RANK 10 -#define GREY_BASE_RANK 5 -#define PWC_BASE_RANK 1 - -static gint -gst_v4l2src_format_get_rank (guint32 fourcc) -{ - switch (fourcc) { - case V4L2_PIX_FMT_MJPEG: - return JPEG_BASE_RANK; - case V4L2_PIX_FMT_JPEG: - return JPEG_BASE_RANK + 1; - - case V4L2_PIX_FMT_RGB332: - case V4L2_PIX_FMT_RGB555: - case V4L2_PIX_FMT_RGB555X: - case V4L2_PIX_FMT_RGB565: - case V4L2_PIX_FMT_RGB565X: - return RGB_ODD_BASE_RANK; - - case V4L2_PIX_FMT_RGB24: - case V4L2_PIX_FMT_BGR24: - return RGB_BASE_RANK - 1; - - case V4L2_PIX_FMT_RGB32: - case V4L2_PIX_FMT_BGR32: - return RGB_BASE_RANK; - - case V4L2_PIX_FMT_GREY: /* 8 Greyscale */ - return GREY_BASE_RANK; - - case V4L2_PIX_FMT_NV12: /* 12 Y/CbCr 4:2:0 */ - case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */ - case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */ - case V4L2_PIX_FMT_HI240: /* 8 8-bit color */ - return YUV_ODD_BASE_RANK; - - case V4L2_PIX_FMT_YVU410: /* YVU9, 9 bits per pixel */ - return YUV_BASE_RANK + 3; - case V4L2_PIX_FMT_YUV410: /* YUV9, 9 bits per pixel */ - return YUV_BASE_RANK + 2; - case V4L2_PIX_FMT_YUV420: /* I420, 12 bits per pixel */ - return YUV_BASE_RANK + 7; - case V4L2_PIX_FMT_YUYV: /* YUY2, 16 bits per pixel */ - return YUV_BASE_RANK + 10; - case V4L2_PIX_FMT_YVU420: /* YV12, 12 bits per pixel */ - return YUV_BASE_RANK + 6; - case V4L2_PIX_FMT_UYVY: /* UYVY, 16 bits per pixel */ - return YUV_BASE_RANK + 9; - case V4L2_PIX_FMT_Y41P: /* Y41P, 12 bits per pixel */ - return YUV_BASE_RANK + 5; - case V4L2_PIX_FMT_YUV411P: /* Y41B, 12 bits per pixel */ - return YUV_BASE_RANK + 4; - case V4L2_PIX_FMT_YUV422P: /* Y42B, 16 bits per pixel */ - return YUV_BASE_RANK + 8; - - case V4L2_PIX_FMT_DV: - return DV_BASE_RANK; - - case V4L2_PIX_FMT_MPEG: /* MPEG */ - case V4L2_PIX_FMT_WNVA: /* Winnov hw compres */ - return 0; - -#ifdef V4L2_PIX_FMT_SBGGR8 - case V4L2_PIX_FMT_SBGGR8: - return BAYER_BASE_RANK; -#endif - -#ifdef V4L2_PIX_FMT_SN9C10X - case V4L2_PIX_FMT_SN9C10X: - return S910_BASE_RANK; -#endif - -#ifdef V4L2_PIX_FMT_PWC1 - case V4L2_PIX_FMT_PWC1: - return PWC_BASE_RANK; -#endif -#ifdef V4L2_PIX_FMT_PWC2 - case V4L2_PIX_FMT_PWC2: - return PWC_BASE_RANK; -#endif - - default: - break; - } - - return 0; -} - -static gint -gst_v4l2src_format_cmp_func (gconstpointer a, gconstpointer b) -{ - guint32 pf1 = ((struct v4l2_fmtdesc *) a)->pixelformat; - guint32 pf2 = ((struct v4l2_fmtdesc *) b)->pixelformat; - - if (pf1 == pf2) - return 0; - - return gst_v4l2src_format_get_rank (pf2) - gst_v4l2src_format_get_rank (pf1); -} - -/****************************************************** - * gst_v4l2src_fill_format_list(): - * create list of supported capture formats - * return value: TRUE on success, FALSE on error - ******************************************************/ -gboolean -gst_v4l2src_fill_format_list (GstV4l2Src * v4l2src) -{ - gint n; - struct v4l2_fmtdesc *format; - - GST_DEBUG_OBJECT (v4l2src, "getting src format enumerations"); - - /* format enumeration */ - for (n = 0;; n++) { - format = g_new0 (struct v4l2_fmtdesc, 1); - - format->index = n; - format->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - if (v4l2_ioctl (v4l2src->v4l2object->video_fd, VIDIOC_ENUM_FMT, format) < 0) { - if (errno == EINVAL) { - g_free (format); - break; /* end of enumeration */ - } else { - goto failed; - } - } - - GST_LOG_OBJECT (v4l2src, "index: %u", format->index); - GST_LOG_OBJECT (v4l2src, "type: %d", format->type); - GST_LOG_OBJECT (v4l2src, "flags: %08x", format->flags); - GST_LOG_OBJECT (v4l2src, "description: '%s'", format->description); - GST_LOG_OBJECT (v4l2src, "pixelformat: %" GST_FOURCC_FORMAT, - GST_FOURCC_ARGS (format->pixelformat)); - - /* sort formats according to our preference; we do this, because caps - * are probed in the order the formats are in the list, and the order of - * formats in the final probed caps matters for things like fixation */ - v4l2src->formats = g_slist_insert_sorted (v4l2src->formats, format, - (GCompareFunc) gst_v4l2src_format_cmp_func); - } - - GST_DEBUG_OBJECT (v4l2src, "got %d format(s)", n); - - return TRUE; - - /* ERRORS */ -failed: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, SETTINGS, - (_("Failed to enumerate possible video formats device '%s' can work with"), v4l2src->v4l2object->videodev), ("Failed to get number %d in pixelformat enumeration for %s. (%d - %s)", n, v4l2src->v4l2object->videodev, errno, g_strerror (errno))); - g_free (format); - return FALSE; - } -} - -/****************************************************** - * gst_v4l2src_clear_format_list(): - * free list of supported capture formats - * return value: TRUE on success, FALSE on error - ******************************************************/ -gboolean -gst_v4l2src_clear_format_list (GstV4l2Src * v4l2src) -{ - g_slist_foreach (v4l2src->formats, (GFunc) g_free, NULL); - g_slist_free (v4l2src->formats); - v4l2src->formats = NULL; - - return TRUE; -} - -/* The frame interval enumeration code first appeared in Linux 2.6.19. */ -#ifdef VIDIOC_ENUM_FRAMEINTERVALS -static GstStructure * -gst_v4l2src_probe_caps_for_format_and_size (GstV4l2Src * v4l2src, - guint32 pixelformat, - guint32 width, guint32 height, const GstStructure * template) -{ - gint fd = v4l2src->v4l2object->video_fd; - struct v4l2_frmivalenum ival; - guint32 num, denom; - GstStructure *s; - GValue rates = { 0, }; - - memset (&ival, 0, sizeof (struct v4l2_frmivalenum)); - ival.index = 0; - ival.pixel_format = pixelformat; - ival.width = width; - ival.height = height; - - GST_LOG_OBJECT (v4l2src, "get frame interval for %ux%u, %" GST_FOURCC_FORMAT, - width, height, GST_FOURCC_ARGS (pixelformat)); - - /* keep in mind that v4l2 gives us frame intervals (durations); we invert the - * fraction to get framerate */ - if (v4l2_ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) < 0) - goto enum_frameintervals_failed; - - if (ival.type == V4L2_FRMIVAL_TYPE_DISCRETE) { - GValue rate = { 0, }; - - g_value_init (&rates, GST_TYPE_LIST); - g_value_init (&rate, GST_TYPE_FRACTION); - - do { - num = ival.discrete.numerator; - denom = ival.discrete.denominator; - - if (num > G_MAXINT || denom > G_MAXINT) { - /* let us hope we don't get here... */ - num >>= 1; - denom >>= 1; - } - - GST_LOG_OBJECT (v4l2src, "adding discrete framerate: %d/%d", denom, num); - - /* swap to get the framerate */ - gst_value_set_fraction (&rate, denom, num); - gst_value_list_append_value (&rates, &rate); - - ival.index++; - } while (v4l2_ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) >= 0); - } else if (ival.type == V4L2_FRMIVAL_TYPE_STEPWISE) { - GValue min = { 0, }; - GValue step = { 0, }; - GValue max = { 0, }; - gboolean added = FALSE; - guint32 minnum, mindenom; - guint32 maxnum, maxdenom; - - g_value_init (&rates, GST_TYPE_LIST); - - g_value_init (&min, GST_TYPE_FRACTION); - g_value_init (&step, GST_TYPE_FRACTION); - g_value_init (&max, GST_TYPE_FRACTION); - - /* get the min */ - minnum = ival.stepwise.min.numerator; - mindenom = ival.stepwise.min.denominator; - if (minnum > G_MAXINT || mindenom > G_MAXINT) { - minnum >>= 1; - mindenom >>= 1; - } - GST_LOG_OBJECT (v4l2src, "stepwise min frame interval: %d/%d", minnum, - mindenom); - gst_value_set_fraction (&min, minnum, mindenom); - - /* get the max */ - maxnum = ival.stepwise.max.numerator; - maxdenom = ival.stepwise.max.denominator; - if (maxnum > G_MAXINT || maxdenom > G_MAXINT) { - maxnum >>= 1; - maxdenom >>= 1; - } - - GST_LOG_OBJECT (v4l2src, "stepwise max frame interval: %d/%d", maxnum, - maxdenom); - gst_value_set_fraction (&max, maxnum, maxdenom); - - /* get the step */ - num = ival.stepwise.step.numerator; - denom = ival.stepwise.step.denominator; - if (num > G_MAXINT || denom > G_MAXINT) { - num >>= 1; - denom >>= 1; - } - - if (num == 0 || denom == 0) { - /* in this case we have a wrong fraction or no step, set the step to max - * so that we only add the min value in the loop below */ - num = maxnum; - denom = maxdenom; - } - - /* since we only have gst_value_fraction_subtract and not add, negate the - * numerator */ - GST_LOG_OBJECT (v4l2src, "stepwise step frame interval: %d/%d", num, denom); - gst_value_set_fraction (&step, -num, denom); - - while (gst_value_compare (&min, &max) <= 0) { - GValue rate = { 0, }; - - num = gst_value_get_fraction_numerator (&min); - denom = gst_value_get_fraction_denominator (&min); - GST_LOG_OBJECT (v4l2src, "adding stepwise framerate: %d/%d", denom, num); - - /* invert to get the framerate */ - g_value_init (&rate, GST_TYPE_FRACTION); - gst_value_set_fraction (&rate, denom, num); - gst_value_list_append_value (&rates, &rate); - added = TRUE; - - /* we're actually adding because step was negated above. This is because - * there is no _add function... */ - if (!gst_value_fraction_subtract (&min, &min, &step)) { - GST_WARNING_OBJECT (v4l2src, "could not step fraction!"); - break; - } - } - if (!added) { - /* no range was added, leave the default range from the template */ - GST_WARNING_OBJECT (v4l2src, "no range added, leaving default"); - g_value_unset (&rates); - } - } else if (ival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) { - guint32 maxnum, maxdenom; - - g_value_init (&rates, GST_TYPE_FRACTION_RANGE); - - num = ival.stepwise.min.numerator; - denom = ival.stepwise.min.denominator; - if (num > G_MAXINT || denom > G_MAXINT) { - num >>= 1; - denom >>= 1; - } - - maxnum = ival.stepwise.max.numerator; - maxdenom = ival.stepwise.max.denominator; - if (maxnum > G_MAXINT || maxdenom > G_MAXINT) { - maxnum >>= 1; - maxdenom >>= 1; - } - - GST_LOG_OBJECT (v4l2src, "continuous frame interval %d/%d to %d/%d", - maxdenom, maxnum, denom, num); - - gst_value_set_fraction_range_full (&rates, maxdenom, maxnum, denom, num); - } else { - goto unknown_type; - } - -return_data: - s = gst_structure_copy (template); - gst_structure_set (s, "width", G_TYPE_INT, (gint) width, - "height", G_TYPE_INT, (gint) height, NULL); - - if (G_IS_VALUE (&rates)) { - /* only change the framerate on the template when we have a valid probed new - * value */ - gst_structure_set_value (s, "framerate", &rates); - g_value_unset (&rates); - } else { - gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 100, 1, - NULL); - } - return s; - - /* ERRORS */ -enum_frameintervals_failed: - { - GST_DEBUG_OBJECT (v4l2src, - "Unable to enumerate intervals for %" GST_FOURCC_FORMAT "@%ux%u", - GST_FOURCC_ARGS (pixelformat), width, height); - goto return_data; - } -unknown_type: - { - /* I don't see how this is actually an error, we ignore the format then */ - GST_WARNING_OBJECT (v4l2src, - "Unknown frame interval type at %" GST_FOURCC_FORMAT "@%ux%u: %u", - GST_FOURCC_ARGS (pixelformat), width, height, ival.type); - return NULL; - } -} -#endif /* defined VIDIOC_ENUM_FRAMEINTERVALS */ - -#ifdef VIDIOC_ENUM_FRAMESIZES -static gint -sort_by_frame_size (GstStructure * s1, GstStructure * s2) -{ - int w1, h1, w2, h2; - - gst_structure_get_int (s1, "width", &w1); - gst_structure_get_int (s1, "height", &h1); - gst_structure_get_int (s2, "width", &w2); - gst_structure_get_int (s2, "height", &h2); - - /* I think it's safe to assume that this won't overflow for a while */ - return ((w2 * h2) - (w1 * h1)); -} -#endif - -GstCaps * -gst_v4l2src_probe_caps_for_format (GstV4l2Src * v4l2src, guint32 pixelformat, - const GstStructure * template) -{ - GstCaps *ret = gst_caps_new_empty (); - GstStructure *tmp; - -#ifdef VIDIOC_ENUM_FRAMESIZES - gint fd = v4l2src->v4l2object->video_fd; - struct v4l2_frmsizeenum size; - GList *results = NULL; - guint32 w, h; - - memset (&size, 0, sizeof (struct v4l2_frmsizeenum)); - size.index = 0; - size.pixel_format = pixelformat; - - GST_DEBUG_OBJECT (v4l2src, "Enumerating frame sizes"); - - if (v4l2_ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) < 0) - goto enum_framesizes_failed; - - if (size.type == V4L2_FRMSIZE_TYPE_DISCRETE) { - do { - GST_LOG_OBJECT (v4l2src, "got discrete frame size %dx%d", - size.discrete.width, size.discrete.height); - - w = MIN (size.discrete.width, G_MAXINT); - h = MIN (size.discrete.height, G_MAXINT); - - if (w && h) { - tmp = gst_v4l2src_probe_caps_for_format_and_size (v4l2src, pixelformat, - w, h, template); - - if (tmp) - results = g_list_prepend (results, tmp); - } - - size.index++; - } while (v4l2_ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) >= 0); - GST_DEBUG_OBJECT (v4l2src, "done iterating discrete frame sizes"); - } else if (size.type == V4L2_FRMSIZE_TYPE_STEPWISE) { - GST_DEBUG_OBJECT (v4l2src, "we have stepwise frame sizes:"); - GST_DEBUG_OBJECT (v4l2src, "min width: %d", size.stepwise.min_width); - GST_DEBUG_OBJECT (v4l2src, "min height: %d", size.stepwise.min_height); - GST_DEBUG_OBJECT (v4l2src, "max width: %d", size.stepwise.max_width); - GST_DEBUG_OBJECT (v4l2src, "min height: %d", size.stepwise.max_height); - GST_DEBUG_OBJECT (v4l2src, "step width: %d", size.stepwise.step_width); - GST_DEBUG_OBJECT (v4l2src, "step height: %d", size.stepwise.step_height); - - for (w = size.stepwise.min_width, h = size.stepwise.min_height; - w < size.stepwise.max_width && h < size.stepwise.max_height; - w += size.stepwise.step_width, h += size.stepwise.step_height) { - if (w == 0 || h == 0) - continue; - - tmp = gst_v4l2src_probe_caps_for_format_and_size (v4l2src, pixelformat, - w, h, template); - - if (tmp) - results = g_list_prepend (results, tmp); - } - GST_DEBUG_OBJECT (v4l2src, "done iterating stepwise frame sizes"); - } else if (size.type == V4L2_FRMSIZE_TYPE_CONTINUOUS) { - guint32 maxw, maxh; - - GST_DEBUG_OBJECT (v4l2src, "we have continuous frame sizes:"); - GST_DEBUG_OBJECT (v4l2src, "min width: %d", size.stepwise.min_width); - GST_DEBUG_OBJECT (v4l2src, "min height: %d", size.stepwise.min_height); - GST_DEBUG_OBJECT (v4l2src, "max width: %d", size.stepwise.max_width); - GST_DEBUG_OBJECT (v4l2src, "min height: %d", size.stepwise.max_height); - - w = MAX (size.stepwise.min_width, 1); - h = MAX (size.stepwise.min_height, 1); - maxw = MIN (size.stepwise.max_width, G_MAXINT); - maxh = MIN (size.stepwise.max_height, G_MAXINT); - - tmp = gst_v4l2src_probe_caps_for_format_and_size (v4l2src, pixelformat, - w, h, template); - if (tmp) { - gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, (gint) w, - (gint) maxw, "height", GST_TYPE_INT_RANGE, (gint) h, (gint) maxh, - NULL); - - /* no point using the results list here, since there's only one struct */ - gst_caps_append_structure (ret, tmp); - } - } else { - goto unknown_type; - } - - /* we use an intermediary list to store and then sort the results of the - * probing because we can't make any assumptions about the order in which - * the driver will give us the sizes, but we want the final caps to contain - * the results starting with the highest resolution and having the lowest - * resolution last, since order in caps matters for things like fixation. */ - results = g_list_sort (results, (GCompareFunc) sort_by_frame_size); - while (results != NULL) { - gst_caps_append_structure (ret, GST_STRUCTURE (results->data)); - results = g_list_delete_link (results, results); - } - - if (gst_caps_is_empty (ret)) - goto enum_framesizes_no_results; - - return ret; - - /* ERRORS */ -enum_framesizes_failed: - { - /* I don't see how this is actually an error */ - GST_DEBUG_OBJECT (v4l2src, - "Failed to enumerate frame sizes for pixelformat %" GST_FOURCC_FORMAT - " (%s)", GST_FOURCC_ARGS (pixelformat), g_strerror (errno)); - goto default_frame_sizes; - } -enum_framesizes_no_results: - { - /* it's possible that VIDIOC_ENUM_FRAMESIZES is defined but the driver in - * question doesn't actually support it yet */ - GST_DEBUG_OBJECT (v4l2src, "No results for pixelformat %" GST_FOURCC_FORMAT - " enumerating frame sizes, trying fallback", - GST_FOURCC_ARGS (pixelformat)); - goto default_frame_sizes; - } -unknown_type: - { - GST_WARNING_OBJECT (v4l2src, - "Unknown frame sizeenum type for pixelformat %" GST_FOURCC_FORMAT - ": %u", GST_FOURCC_ARGS (pixelformat), size.type); - goto default_frame_sizes; - } -default_frame_sizes: -#endif /* defined VIDIOC_ENUM_FRAMESIZES */ - { - gint min_w, max_w, min_h, max_h, fix_num = 0, fix_denom = 0; - - /* This code is for Linux < 2.6.19 */ - min_w = min_h = 1; - max_w = max_h = GST_V4L2_MAX_SIZE; - if (!gst_v4l2src_get_nearest_size (v4l2src, pixelformat, &min_w, &min_h)) { - GST_WARNING_OBJECT (v4l2src, - "Could not probe minimum capture size for pixelformat %" - GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat)); - } - if (!gst_v4l2src_get_nearest_size (v4l2src, pixelformat, &max_w, &max_h)) { - GST_WARNING_OBJECT (v4l2src, - "Could not probe maximum capture size for pixelformat %" - GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat)); - } - - /* Since we can't get framerate directly, try to use the current norm */ - if (v4l2src->v4l2object->norm && v4l2src->v4l2object->norms) { - GList *norms; - GstTunerNorm *norm; - - for (norms = v4l2src->v4l2object->norms; norms != NULL; - norms = norms->next) { - norm = (GstTunerNorm *) norms->data; - if (!strcmp (norm->label, v4l2src->v4l2object->norm)) - break; - } - /* If it's possible, set framerate to that (discrete) value */ - if (norm) { - fix_num = gst_value_get_fraction_numerator (&norm->framerate); - fix_denom = gst_value_get_fraction_denominator (&norm->framerate); - } - } - - tmp = gst_structure_copy (template); - if (fix_num) { - gst_structure_set (tmp, - "width", GST_TYPE_INT_RANGE, min_w, max_w, - "height", GST_TYPE_INT_RANGE, min_h, max_h, - "framerate", GST_TYPE_FRACTION, fix_num, fix_denom, NULL); - } else { - /* if norm can't be used, copy the template framerate */ - gst_structure_set (tmp, - "width", GST_TYPE_INT_RANGE, min_w, max_w, - "height", GST_TYPE_INT_RANGE, min_h, max_h, - "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 100, 1, NULL); - } - gst_caps_append_structure (ret, tmp); - - return ret; - } -} - /****************************************************** * gst_v4l2src_grab_frame (): * grab a frame for capturing @@ -987,27 +95,28 @@ GstFlowReturn gst_v4l2src_grab_frame (GstV4l2Src * v4l2src, GstBuffer ** buf) { #define NUM_TRIALS 50 - struct v4l2_buffer buffer; + GstV4l2Object *v4l2object; + GstV4l2BufferPool *pool; gint32 trials = NUM_TRIALS; GstBuffer *pool_buffer; gboolean need_copy; - gint index; gint ret; - memset (&buffer, 0x00, sizeof (buffer)); - buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buffer.memory = V4L2_MEMORY_MMAP; + v4l2object = v4l2src->v4l2object; + pool = v4l2src->pool; + + GST_DEBUG_OBJECT (v4l2src, "grab frame"); for (;;) { - if (v4l2src->v4l2object->can_poll_device) { - ret = gst_poll_wait (v4l2src->v4l2object->poll, GST_CLOCK_TIME_NONE); + if (v4l2object->can_poll_device) { + ret = gst_poll_wait (v4l2object->poll, GST_CLOCK_TIME_NONE); if (G_UNLIKELY (ret < 0)) { if (errno == EBUSY) goto stopped; if (errno == ENXIO) { GST_DEBUG_OBJECT (v4l2src, "v4l2 device doesn't support polling. Disabling"); - v4l2src->v4l2object->can_poll_device = FALSE; + v4l2object->can_poll_device = FALSE; } else { if (errno != EAGAIN && errno != EINTR) goto select_error; @@ -1015,104 +124,37 @@ gst_v4l2src_grab_frame (GstV4l2Src * v4l2src, GstBuffer ** buf) } } - if (v4l2_ioctl (v4l2src->v4l2object->video_fd, VIDIOC_DQBUF, &buffer) >= 0) + pool_buffer = GST_BUFFER (gst_v4l2_buffer_pool_dqbuf (pool)); + if (pool_buffer) break; - GST_WARNING_OBJECT (v4l2src, - "problem grabbing frame %d (ix=%d), trials=%d, pool-ct=%d, buf.flags=%d", - buffer.sequence, buffer.index, trials, - GST_MINI_OBJECT_REFCOUNT (v4l2src->pool), buffer.flags); + GST_WARNING_OBJECT (pool->v4l2elem, "trials=%d", trials); /* if the sync() got interrupted, we can retry */ switch (errno) { - case EAGAIN: - GST_WARNING_OBJECT (v4l2src, - "Non-blocking I/O has been selected using O_NONBLOCK and" - " no buffer was in the outgoing queue. device %s", - v4l2src->v4l2object->videodev); - break; case EINVAL: - goto einval; case ENOMEM: - goto enomem; + /* fatal */ + return GST_FLOW_ERROR; + + case EAGAIN: case EIO: - GST_INFO_OBJECT (v4l2src, - "VIDIOC_DQBUF failed due to an internal error." - " Can also indicate temporary problems like signal loss." - " Note the driver might dequeue an (empty) buffer despite" - " returning an error, or even stop capturing." - " device %s", v4l2src->v4l2object->videodev); - /* have we de-queued a buffer ? */ - if (!(buffer.flags & (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))) { - /* this fails - if ((buffer.index >= 0) && (buffer.index < v4l2src->breq.count)) { - GST_DEBUG_OBJECT (v4l2src, "reenqueing buffer (ix=%ld)", buffer.index); - gst_v4l2src_queue_frame (v4l2src, buffer.index); - } - else { - */ - GST_DEBUG_OBJECT (v4l2src, "reenqueing buffer"); - /* FIXME: this is not a good idea, as drivers usualy return the buffer - * with index-number set to 0, thus the re-enque will fail unless it - * was incidentialy 0. - * We could try to re-enque all buffers without handling the ioctl - * return. - */ - /* - if (ioctl (v4l2src->v4l2object->video_fd, VIDIOC_QBUF, &buffer) < 0) { - goto qbuf_failed; - } - */ - /*} */ - } - break; case EINTR: - GST_WARNING_OBJECT (v4l2src, - "could not sync on a buffer on device %s", - v4l2src->v4l2object->videodev); - break; default: - GST_WARNING_OBJECT (v4l2src, - "Grabbing frame got interrupted on %s unexpectedly. %d: %s.", - v4l2src->v4l2object->videodev, errno, g_strerror (errno)); + /* try again, until too many trials */ break; } /* check nr. of attempts to capture */ if (--trials == -1) { goto too_many_trials; - } else { - memset (&buffer, 0x00, sizeof (buffer)); - buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buffer.memory = V4L2_MEMORY_MMAP; } } - g_mutex_lock (v4l2src->pool->lock); - - index = buffer.index; - - /* get our GstBuffer with that index from the pool, if the buffer was - * outstanding we have a serious problem. */ - pool_buffer = GST_BUFFER (v4l2src->pool->buffers[index]); - - if (pool_buffer == NULL) - goto no_buffer; - - GST_LOG_OBJECT (v4l2src, "grabbed buffer %p at index %d", pool_buffer, index); - - /* we have the buffer now, mark the spot in the pool empty */ - v4l2src->pool->buffers[index] = NULL; - v4l2src->pool->num_live_buffers++; /* if we are handing out the last buffer in the pool, we need to make a * copy and bring the buffer back in the pool. */ need_copy = v4l2src->always_copy - || (v4l2src->pool->num_live_buffers == v4l2src->pool->buffer_count); - - g_mutex_unlock (v4l2src->pool->lock); - - /* this can change at every frame, esp. with jpeg */ - GST_BUFFER_SIZE (pool_buffer) = buffer.bytesused; + || !gst_v4l2_buffer_pool_available_buffers (pool); if (G_UNLIKELY (need_copy)) { *buf = gst_buffer_copy (pool_buffer); @@ -1124,16 +166,12 @@ gst_v4l2src_grab_frame (GstV4l2Src * v4l2src, GstBuffer ** buf) } /* we set the buffer metadata in gst_v4l2src_create() */ - GST_LOG_OBJECT (v4l2src, "grabbed frame %d (ix=%d), flags %08x, pool-ct=%d", - buffer.sequence, buffer.index, buffer.flags, - v4l2src->pool->num_live_buffers); - return GST_FLOW_OK; /* ERRORS */ select_error: { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, READ, (NULL), + GST_ELEMENT_ERROR (pool->v4l2elem, RESOURCE, READ, (NULL), ("select error %d: %s (%d)", ret, g_strerror (errno), errno)); return GST_FLOW_ERROR; } @@ -1142,52 +180,15 @@ stopped: GST_DEBUG ("stop called"); return GST_FLOW_WRONG_STATE; } -einval: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, FAILED, - (_("Failed trying to get video frames from device '%s'."), - v4l2src->v4l2object->videodev), - (_("The buffer type is not supported, or the index is out of bounds," - " or no buffers have been allocated yet, or the userptr" - " or length are invalid. device %s"), - v4l2src->v4l2object->videodev)); - return GST_FLOW_ERROR; - } -enomem: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, FAILED, - (_("Failed trying to get video frames from device '%s'. Not enough memory."), v4l2src->v4l2object->videodev), (_("insufficient memory to enqueue a user pointer buffer. device %s."), v4l2src->v4l2object->videodev)); - return GST_FLOW_ERROR; - } too_many_trials: { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, FAILED, + GST_ELEMENT_ERROR (pool->v4l2elem, RESOURCE, FAILED, (_("Failed trying to get video frames from device '%s'."), - v4l2src->v4l2object->videodev), + v4l2object->videodev), (_("Failed after %d tries. device %s. system error: %s"), - NUM_TRIALS, v4l2src->v4l2object->videodev, g_strerror (errno))); - return GST_FLOW_ERROR; - } -no_buffer: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, FAILED, - (_("Failed trying to get video frames from device '%s'."), - v4l2src->v4l2object->videodev), - (_("No free buffers found in the pool at index %d."), index)); - g_mutex_unlock (v4l2src->pool->lock); - return GST_FLOW_ERROR; - } -/* -qbuf_failed: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, WRITE, - (_("Could not exchange data with device '%s'."), - v4l2src->v4l2object->videodev), - ("Error queueing buffer on device %s. system error: %s", - v4l2src->v4l2object->videodev, g_strerror (errno))); + NUM_TRIALS, v4l2object->videodev, g_strerror (errno))); return GST_FLOW_ERROR; } -*/ } /* Note about fraction simplification @@ -1205,49 +206,14 @@ gst_v4l2src_set_capture (GstV4l2Src * v4l2src, guint32 pixelformat, guint32 width, guint32 height, guint fps_n, guint fps_d) { gint fd = v4l2src->v4l2object->video_fd; - struct v4l2_format format; struct v4l2_streamparm stream; - GST_DEBUG_OBJECT (v4l2src, "Setting capture format to %dx%d, format " - "%" GST_FOURCC_FORMAT, width, height, GST_FOURCC_ARGS (pixelformat)); - - GST_V4L2_CHECK_OPEN (v4l2src->v4l2object); - GST_V4L2_CHECK_NOT_ACTIVE (v4l2src->v4l2object); - - memset (&format, 0x00, sizeof (struct v4l2_format)); - format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - if (v4l2_ioctl (fd, VIDIOC_G_FMT, &format) < 0) - goto get_fmt_failed; - - format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - format.fmt.pix.width = width; - format.fmt.pix.height = height; - format.fmt.pix.pixelformat = pixelformat; - /* request whole frames; change when gstreamer supports interlaced video - * (INTERLACED mode returns frames where the fields have already been - * combined, there are other modes for requesting fields individually) */ - format.fmt.pix.field = V4L2_FIELD_INTERLACED; - - if (v4l2_ioctl (fd, VIDIOC_S_FMT, &format) < 0) { - if (errno != EINVAL) - goto set_fmt_failed; - - /* try again with progressive video */ - format.fmt.pix.width = width; - format.fmt.pix.height = height; - format.fmt.pix.pixelformat = pixelformat; - format.fmt.pix.field = V4L2_FIELD_NONE; - if (v4l2_ioctl (fd, VIDIOC_S_FMT, &format) < 0) - goto set_fmt_failed; + if (!gst_v4l2_object_set_format (v4l2src->v4l2object, pixelformat, width, + height)) { + /* error already reported */ + return FALSE; } - if (format.fmt.pix.width != width || format.fmt.pix.height != height) - goto invalid_dimensions; - - if (format.fmt.pix.pixelformat != pixelformat) - goto invalid_pixelformat; - /* Is there a reason we require the caller to always specify a framerate? */ GST_LOG_OBJECT (v4l2src, "Desired framerate: %u/%u", fps_n, fps_d); @@ -1297,45 +263,6 @@ gst_v4l2src_set_capture (GstV4l2Src * v4l2src, guint32 pixelformat, done: return TRUE; - - /* ERRORS */ -get_fmt_failed: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, SETTINGS, - (_("Device '%s' does not support video capture"), - v4l2src->v4l2object->videodev), - ("Call to G_FMT failed: (%s)", g_strerror (errno))); - return FALSE; - } -set_fmt_failed: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, SETTINGS, - (_("Device '%s' cannot capture at %dx%d"), - v4l2src->v4l2object->videodev, width, height), - ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s", - GST_FOURCC_ARGS (pixelformat), width, height, g_strerror (errno))); - return FALSE; - } -invalid_dimensions: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, SETTINGS, - (_("Device '%s' cannot capture at %dx%d"), - v4l2src->v4l2object->videodev, width, height), - ("Tried to capture at %dx%d, but device returned size %dx%d", - width, height, format.fmt.pix.width, format.fmt.pix.height)); - return FALSE; - } -invalid_pixelformat: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, SETTINGS, - (_("Device '%s' cannot capture in the specified format"), - v4l2src->v4l2object->videodev), - ("Tried to capture in %" GST_FOURCC_FORMAT - ", but device returned format" " %" GST_FOURCC_FORMAT, - GST_FOURCC_ARGS (pixelformat), - GST_FOURCC_ARGS (format.fmt.pix.pixelformat))); - return FALSE; - } } /****************************************************** @@ -1346,11 +273,6 @@ invalid_pixelformat: gboolean gst_v4l2src_capture_init (GstV4l2Src * v4l2src, GstCaps * caps) { - gint fd = v4l2src->v4l2object->video_fd; - struct v4l2_requestbuffers breq; - - memset (&breq, 0, sizeof (struct v4l2_requestbuffers)); - GST_DEBUG_OBJECT (v4l2src, "initializing the capture system"); GST_V4L2_CHECK_OPEN (v4l2src->v4l2object); @@ -1358,38 +280,22 @@ gst_v4l2src_capture_init (GstV4l2Src * v4l2src, GstCaps * caps) if (v4l2src->v4l2object->vcap.capabilities & V4L2_CAP_STREAMING) { - GST_DEBUG_OBJECT (v4l2src, "STREAMING, requesting %d MMAP CAPTURE buffers", - v4l2src->num_buffers); - - breq.count = v4l2src->num_buffers; - breq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - breq.memory = V4L2_MEMORY_MMAP; - - if (v4l2_ioctl (fd, VIDIOC_REQBUFS, &breq) < 0) - goto reqbufs_failed; - - GST_LOG_OBJECT (v4l2src, " count: %u", breq.count); - GST_LOG_OBJECT (v4l2src, " type: %d", breq.type); - GST_LOG_OBJECT (v4l2src, " memory: %d", breq.memory); - - if (breq.count < GST_V4L2_MIN_BUFFERS) - goto no_buffers; - - if (v4l2src->num_buffers != breq.count) { - GST_WARNING_OBJECT (v4l2src, "using %u buffers instead", breq.count); - v4l2src->num_buffers = breq.count; - g_object_notify (G_OBJECT (v4l2src), "queue-size"); - } - /* Map the buffers */ GST_LOG_OBJECT (v4l2src, "initiating buffer pool"); - if (!(v4l2src->pool = gst_v4l2_buffer_pool_new (v4l2src, fd, - v4l2src->num_buffers, caps))) + if (!(v4l2src->pool = gst_v4l2_buffer_pool_new (GST_ELEMENT (v4l2src), + v4l2src->v4l2object->video_fd, + v4l2src->num_buffers, caps, TRUE, V4L2_BUF_TYPE_VIDEO_CAPTURE))) goto buffer_pool_new_failed; GST_INFO_OBJECT (v4l2src, "capturing buffers via mmap()"); v4l2src->use_mmap = TRUE; + + if (v4l2src->num_buffers != v4l2src->pool->buffer_count) { + v4l2src->num_buffers = v4l2src->pool->buffer_count; + g_object_notify (G_OBJECT (v4l2src), "queue-size"); + } + } else if (v4l2src->v4l2object->vcap.capabilities & V4L2_CAP_READWRITE) { GST_INFO_OBJECT (v4l2src, "capturing buffers via read()"); v4l2src->use_mmap = FALSE; @@ -1403,24 +309,6 @@ gst_v4l2src_capture_init (GstV4l2Src * v4l2src, GstCaps * caps) return TRUE; /* ERRORS */ -reqbufs_failed: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, READ, - (_("Could not get buffers from device '%s'."), - v4l2src->v4l2object->videodev), - ("error requesting %d buffers: %s", - v4l2src->num_buffers, g_strerror (errno))); - return FALSE; - } -no_buffers: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, READ, - (_("Could not get enough buffers from device '%s'."), - v4l2src->v4l2object->videodev), - ("we received %d from device '%s', we want at least %d", - breq.count, v4l2src->v4l2object->videodev, GST_V4L2_MIN_BUFFERS)); - return FALSE; - } buffer_pool_new_failed: { GST_ELEMENT_ERROR (v4l2src, RESOURCE, READ, @@ -1447,9 +335,6 @@ no_supported_capture_method: gboolean gst_v4l2src_capture_start (GstV4l2Src * v4l2src) { - gint type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - gint fd = v4l2src->v4l2object->video_fd; - GST_DEBUG_OBJECT (v4l2src, "starting the capturing"); //GST_V4L2_CHECK_OPEN (v4l2src->v4l2object); GST_V4L2_CHECK_ACTIVE (v4l2src->v4l2object); @@ -1457,30 +342,18 @@ gst_v4l2src_capture_start (GstV4l2Src * v4l2src) v4l2src->quit = FALSE; if (v4l2src->use_mmap) { - if (!gst_v4l2_buffer_pool_activate (v4l2src->pool, v4l2src)) - goto pool_activate_failed; + if (!gst_v4l2src_buffer_pool_activate (v4l2src->pool, v4l2src)) { + return FALSE; + } - if (v4l2_ioctl (fd, VIDIOC_STREAMON, &type) < 0) - goto streamon_failed; + if (!gst_v4l2_object_start_streaming (v4l2src->v4l2object)) { + return FALSE; + } } v4l2src->is_capturing = TRUE; return TRUE; - - /* ERRORS */ -pool_activate_failed: - { - /* already errored */ - return FALSE; - } -streamon_failed: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, OPEN_READ, - (_("Error starting streaming capture from device '%s'."), - v4l2src->v4l2object->videodev), GST_ERROR_SYSTEM); - return FALSE; - } } /****************************************************** @@ -1491,8 +364,6 @@ streamon_failed: gboolean gst_v4l2src_capture_stop (GstV4l2Src * v4l2src) { - gint type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - GST_DEBUG_OBJECT (v4l2src, "stopping capturing"); if (!GST_V4L2_IS_OPEN (v4l2src->v4l2object)) { @@ -1505,8 +376,9 @@ gst_v4l2src_capture_stop (GstV4l2Src * v4l2src) if (v4l2src->use_mmap) { /* we actually need to sync on all queued buffers but not * on the non-queued ones */ - if (v4l2_ioctl (v4l2src->v4l2object->video_fd, VIDIOC_STREAMOFF, &type) < 0) - goto streamoff_failed; + if (!gst_v4l2_object_stop_streaming (v4l2src->v4l2object)) { + return FALSE; + } } done: @@ -1516,15 +388,6 @@ done: v4l2src->is_capturing = FALSE; return TRUE; - - /* ERRORS */ -streamoff_failed: - { - GST_ELEMENT_ERROR (v4l2src, RESOURCE, CLOSE, - (_("Error stopping streaming capture from device '%s'."), - v4l2src->v4l2object->videodev), GST_ERROR_SYSTEM); - return FALSE; - } } /****************************************************** @@ -1553,80 +416,3 @@ gst_v4l2src_capture_deinit (GstV4l2Src * v4l2src) return TRUE; } - -/* - */ -static gboolean -gst_v4l2src_get_nearest_size (GstV4l2Src * v4l2src, guint32 pixelformat, - gint * width, gint * height) -{ - struct v4l2_format fmt; - int fd; - int r; - - g_return_val_if_fail (width != NULL, FALSE); - g_return_val_if_fail (height != NULL, FALSE); - - GST_LOG_OBJECT (v4l2src, - "getting nearest size to %dx%d with format %" GST_FOURCC_FORMAT, - *width, *height, GST_FOURCC_ARGS (pixelformat)); - - fd = v4l2src->v4l2object->video_fd; - - /* get size delimiters */ - memset (&fmt, 0, sizeof (fmt)); - fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - fmt.fmt.pix.width = *width; - fmt.fmt.pix.height = *height; - fmt.fmt.pix.pixelformat = pixelformat; - fmt.fmt.pix.field = V4L2_FIELD_INTERLACED; - - r = v4l2_ioctl (fd, VIDIOC_TRY_FMT, &fmt); - if (r < 0 && errno == EINVAL) { - /* try again with progressive video */ - fmt.fmt.pix.width = *width; - fmt.fmt.pix.height = *height; - fmt.fmt.pix.pixelformat = pixelformat; - fmt.fmt.pix.field = V4L2_FIELD_NONE; - r = v4l2_ioctl (fd, VIDIOC_TRY_FMT, &fmt); - } - - if (r < 0) { - /* The driver might not implement TRY_FMT, in which case we will try - S_FMT to probe */ - if (errno != ENOTTY) - return FALSE; - - /* Only try S_FMT if we're not actively capturing yet, which we shouldn't - be, because we're still probing */ - if (GST_V4L2_IS_ACTIVE (v4l2src->v4l2object)) - return FALSE; - - GST_LOG_OBJECT (v4l2src, - "Failed to probe size limit with VIDIOC_TRY_FMT, trying VIDIOC_S_FMT"); - - fmt.fmt.pix.width = *width; - fmt.fmt.pix.height = *height; - - r = v4l2_ioctl (fd, VIDIOC_S_FMT, &fmt); - if (r < 0 && errno == EINVAL) { - /* try again with progressive video */ - fmt.fmt.pix.width = *width; - fmt.fmt.pix.height = *height; - fmt.fmt.pix.pixelformat = pixelformat; - fmt.fmt.pix.field = V4L2_FIELD_NONE; - r = v4l2_ioctl (fd, VIDIOC_S_FMT, &fmt); - } - - if (r < 0) - return FALSE; - } - - GST_LOG_OBJECT (v4l2src, - "got nearest size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height); - - *width = fmt.fmt.pix.width; - *height = fmt.fmt.pix.height; - - return TRUE; -} |