Re: [PATCH v1 1/3] media: v4l: Add VP8 format support in V4L2 framework

From: Enric Balletbo Serra
Date: Wed Jan 27 2016 - 05:22:14 EST

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Next in thread: Jung Zhao: "çå: [PATCH v1 1/3] media: v4l: Add VP8 format support in V4L2 framework"
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Hi Jung,

Also, if I'm not wrong these changes are a mix of these three patches
available in the chromium tree[1], it's a good practice cherry-pick
the patches (removing the CHROMIUM tags, rebase against mainline...)
cc the authors and maintain the author and the signed-off chain. Note
also that the patches have a good explanation so better use the
original ones.

Best regards,
Enric

[1]

Author: Tomasz Figa <tfiga@xxxxxxxxxxxx>
Date: Mon Apr 13 14:34:06 2015 +0900

CHROMIUM: [media] videobuf2-dc: Let drivers specify DMA attrs

DMA allocations might be subject to certain reqiurements specific to the
hardware using the buffers, such as availability of kernel mapping (for
contents fix-ups in the driver). The only entity that knows them is the
driver, so it must share this knowledge with vb2-dc.

This patch extends the alloc_ctx initialization interface to let the
driver specify DMA attrs, which are then stored inside the allocation
context and will be used for all allocations with that context.

As a side effect, all dma_*_coherent() calls are turned into
dma_*_attrs() calls, because the attributes need to be carried over
through all DMA operations.

Author: Pawel Osciak <posciak@xxxxxxxxxxxx>
Date: Fri Dec 26 10:37:33 2014 +0900

CHROMIUM: v4l: Add VP8 low-level decoder API controls.

These controls are to be used with the new low-level decoder API for VP8
to provide additional parameters for the hardware that cannot parse the
input stream.

Author: Pawel Osciak <posciak@xxxxxxxxxxxx>
Date: Tue Nov 11 20:44:28 2014 +0900

CHROMIUM: [media] v4l: Add private compound control type.

V4L2_CTRL_TYPE_PRIVATE is to be used for private driver compound
controls that use the "ptr" member of struct v4l2_ext_control.

2016-01-27 0:53 GMT+01:00 Nicolas Dufresne <nicolas.dufresne@xxxxxxxxxxxxx>:
> Hi Jung,
>
> this patch adds new public API to videodev2.h. It would be appropriate
> to also add the associated documentation for it (see Documentation/DocBook/media). I also believe there is multiple way VP8 support could have been added. A proper commit message that explains the approach would also be appropriate.
>
> cheers,
> Nicolas
>
> Le mardi 26 janvier 2016 Ã 17:04 +0800, Jung Zhao a Ãcrit :
>> From: zhaojun <jung.zhao@xxxxxxxxxxxxxx>
>>
>> Signed-off-by: zhaojun <jung.zhao@xxxxxxxxxxxxxx>
>> ---
>>
>> drivers/media/v4l2-core/v4l2-ctrls.c | 17 ++++-
>> drivers/media/v4l2-core/v4l2-ioctl.c | 3 +
>> drivers/media/v4l2-core/videobuf2-dma-contig.c | 51 +++++++++-----
>> include/media/v4l2-ctrls.h | 2 +
>> include/media/videobuf2-dma-contig.h | 11 ++-
>> include/uapi/linux/v4l2-controls.h | 98
>> ++++++++++++++++++++++++++
>> include/uapi/linux/videodev2.h | 5 ++
>> 7 files changed, 166 insertions(+), 21 deletions(-)
>>
>> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c
>> b/drivers/media/v4l2-core/v4l2-ctrls.c
>> index 890520d..22821e94 100644
>> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
>> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
>> @@ -761,7 +761,7 @@ const char *v4l2_ctrl_get_name(u32 id)
>> case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: retu
>> rn "VPX I-Frame QP Value";
>> case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: retu
>> rn "VPX P-Frame QP Value";
>> case V4L2_CID_MPEG_VIDEO_VPX_PROFILE:
>> return "VPX Profile";
>> -
>> + case V4L2_CID_MPEG_VIDEO_VP8_FRAME_HDR:
>> return "VP8 Frame Header";
>> /* CAMERA controls */
>> /* Keep the order of the 'case's the same as in v4l2-
>> controls.h! */
>> case V4L2_CID_CAMERA_CLASS: return "Camera
>> Controls";
>> @@ -1126,6 +1126,9 @@ void v4l2_ctrl_fill(u32 id, const char **name,
>> enum v4l2_ctrl_type *type,
>> case V4L2_CID_RDS_TX_ALT_FREQS:
>> *type = V4L2_CTRL_TYPE_U32;
>> break;
>> + case V4L2_CID_MPEG_VIDEO_VP8_FRAME_HDR:
>> + *type = V4L2_CTRL_TYPE_VP8_FRAME_HDR;
>> + break;
>> default:
>> *type = V4L2_CTRL_TYPE_INTEGER;
>> break;
>> @@ -1525,6 +1528,13 @@ static int std_validate(const struct v4l2_ctrl
>> *ctrl, u32 idx,
>> return -ERANGE;
>> return 0;
>>
>> + /* FIXME:just return 0 for now */
>> + case V4L2_CTRL_TYPE_PRIVATE:
>> + return 0;
>> +
>> + case V4L2_CTRL_TYPE_VP8_FRAME_HDR:
>> + return 0;
>> +
>> default:
>> return -EINVAL;
>> }
>> @@ -2074,6 +2084,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct
>> v4l2_ctrl_handler *hdl,
>> case V4L2_CTRL_TYPE_U32:
>> elem_size = sizeof(u32);
>> break;
>> + case V4L2_CTRL_TYPE_VP8_FRAME_HDR:
>> + elem_size = sizeof(struct v4l2_ctrl_vp8_frame_hdr);
>> + break;
>> default:
>> if (type < V4L2_CTRL_COMPOUND_TYPES)
>> elem_size = sizeof(s32);
>> @@ -2098,7 +2111,7 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct
>> v4l2_ctrl_handler *hdl,
>> handler_set_err(hdl, -ERANGE);
>> return NULL;
>> }
>> - if (is_array &&
>> + if ((is_array || (flags & V4L2_CTRL_FLAG_REQ_KEEP)) &&
>> (type == V4L2_CTRL_TYPE_BUTTON ||
>> type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
>> handler_set_err(hdl, -EINVAL);
>> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c
>> b/drivers/media/v4l2-core/v4l2-ioctl.c
>> index 7d028d1..8aa5812 100644
>> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
>> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
>> @@ -1259,6 +1259,9 @@ static void v4l_fill_fmtdesc(struct
>> v4l2_fmtdesc *fmt)
>> case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1
>> (SMPTE 412M Annex G)"; break;
>> case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1
>> (SMPTE 412M Annex L)"; break;
>> case V4L2_PIX_FMT_VP8: descr = "VP8";
>> break;
>> + case V4L2_PIX_FMT_VP8_FRAME:
>> + descr = "VP8 FRAME";
>> + break;
>> case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA
>> YUV"; break;
>> case V4L2_PIX_FMT_WNVA: descr =
>> "WNVA"; break;
>> case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA
>> SN9C10X"; break;
>> diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c
>> b/drivers/media/v4l2-core/videobuf2-dma-contig.c
>> index c331272..aebcc7f 100644
>> --- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
>> +++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
>> @@ -23,13 +23,16 @@
>>
>> struct vb2_dc_conf {
>> struct device *dev;
>> + struct dma_attrs attrs;
>> };
>>
>> struct vb2_dc_buf {
>> struct device *dev;
>> void *vaddr;
>> unsigned long size;
>> + void *cookie;
>> dma_addr_t dma_addr;
>> + struct dma_attrs attrs;
>> enum dma_data_direction dma_dir;
>> struct sg_table *dma_sgt;
>> struct frame_vector *vec;
>> @@ -131,7 +134,8 @@ static void vb2_dc_put(void *buf_priv)
>> sg_free_table(buf->sgt_base);
>> kfree(buf->sgt_base);
>> }
>> - dma_free_coherent(buf->dev, buf->size, buf->vaddr, buf-
>> >dma_addr);
>> + dma_free_attrs(buf->dev, buf->size, buf->cookie, buf-
>> >dma_addr,
>> + &buf->attrs);
>> put_device(buf->dev);
>> kfree(buf);
>> }
>> @@ -143,18 +147,22 @@ static void *vb2_dc_alloc(void *alloc_ctx,
>> unsigned long size,
>> struct device *dev = conf->dev;
>> struct vb2_dc_buf *buf;
>>
>> - buf = kzalloc(sizeof *buf, GFP_KERNEL);
>> + buf = kzalloc(sizeof(*buf), GFP_KERNEL);
>> if (!buf)
>> return ERR_PTR(-ENOMEM);
>>
>> - buf->vaddr = dma_alloc_coherent(dev, size, &buf->dma_addr,
>> - GFP_KERNEL |
>> gfp_flags);
>> - if (!buf->vaddr) {
>> + buf->attrs = conf->attrs;
>> + buf->cookie = dma_alloc_attrs(dev, size, &buf->dma_addr,
>> + GFP_KERNEL | gfp_flags,
>> &buf->attrs);
>> + if (!buf->cookie) {
>> dev_err(dev, "dma_alloc_coherent of size %ld
>> failed\n", size);
>> kfree(buf);
>> return ERR_PTR(-ENOMEM);
>> }
>>
>> + if (!dma_get_attr(DMA_ATTR_NO_KERNEL_MAPPING, &buf->attrs))
>> + buf->vaddr = buf->cookie;
>> +
>> /* Prevent the device from being released while the buffer
>> is used */
>> buf->dev = get_device(dev);
>> buf->size = size;
>> @@ -185,8 +193,8 @@ static int vb2_dc_mmap(void *buf_priv, struct
>> vm_area_struct *vma)
>> */
>> vma->vm_pgoff = 0;
>>
>> - ret = dma_mmap_coherent(buf->dev, vma, buf->vaddr,
>> - buf->dma_addr, buf->size);
>> + ret = dma_mmap_attrs(buf->dev, vma, buf->cookie,
>> + buf->dma_addr, buf->size, &buf->attrs);
>>
>> if (ret) {
>> pr_err("Remapping memory failed, error: %d\n", ret);
>> @@ -329,7 +337,7 @@ static void *vb2_dc_dmabuf_ops_kmap(struct
>> dma_buf *dbuf, unsigned long pgnum)
>> {
>> struct vb2_dc_buf *buf = dbuf->priv;
>>
>> - return buf->vaddr + pgnum * PAGE_SIZE;
>> + return buf->vaddr ? buf->vaddr + pgnum * PAGE_SIZE : NULL;
>> }
>>
>> static void *vb2_dc_dmabuf_ops_vmap(struct dma_buf *dbuf)
>> @@ -368,8 +376,8 @@ static struct sg_table
>> *vb2_dc_get_base_sgt(struct vb2_dc_buf *buf)
>> return NULL;
>> }
>>
>> - ret = dma_get_sgtable(buf->dev, sgt, buf->vaddr, buf-
>> >dma_addr,
>> - buf->size);
>> + ret = dma_get_sgtable_attrs(buf->dev, sgt, buf->cookie, buf-
>> >dma_addr,
>> + buf->size, &buf->attrs);
>> if (ret < 0) {
>> dev_err(buf->dev, "failed to get scatterlist from
>> DMA API\n");
>> kfree(sgt);
>> @@ -448,22 +456,26 @@ static void vb2_dc_put_userptr(void *buf_priv)
>> */
>>
>> #ifdef __arch_pfn_to_dma
>> -static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev,
>> unsigned long pfn)
>> +static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev,
>> + unsigned long pfn)
>> {
>> return (dma_addr_t)__arch_pfn_to_dma(dev, pfn);
>> }
>> #elif defined(__pfn_to_bus)
>> -static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev,
>> unsigned long pfn)
>> +static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev,
>> + unsigned long pfn)
>> {
>> return (dma_addr_t)__pfn_to_bus(pfn);
>> }
>> #elif defined(__pfn_to_phys)
>> -static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev,
>> unsigned long pfn)
>> +static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev,
>> + unsigned long pfn)
>> {
>> return (dma_addr_t)__pfn_to_phys(pfn);
>> }
>> #else
>> -static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev,
>> unsigned long pfn)
>> +static inline dma_addr_t vb2_dc_pfn_to_dma(struct device *dev,
>> + unsigned long pfn)
>> {
>> /* really, we cannot do anything better at this point */
>> return (dma_addr_t)(pfn) << PAGE_SHIFT;
>> @@ -497,7 +509,7 @@ static void *vb2_dc_get_userptr(void *alloc_ctx,
>> unsigned long vaddr,
>> return ERR_PTR(-EINVAL);
>> }
>>
>> - buf = kzalloc(sizeof *buf, GFP_KERNEL);
>> + buf = kzalloc(sizeof(*buf), GFP_KERNEL);
>> if (!buf)
>> return ERR_PTR(-ENOMEM);
>>
>> @@ -721,19 +733,22 @@ const struct vb2_mem_ops vb2_dma_contig_memops
>> = {
>> };
>> EXPORT_SYMBOL_GPL(vb2_dma_contig_memops);
>>
>> -void *vb2_dma_contig_init_ctx(struct device *dev)
>> +void *vb2_dma_contig_init_ctx_attrs(struct device *dev,
>> + struct dma_attrs *attrs)
>> {
>> struct vb2_dc_conf *conf;
>>
>> - conf = kzalloc(sizeof *conf, GFP_KERNEL);
>> + conf = kzalloc(sizeof(*conf), GFP_KERNEL);
>> if (!conf)
>> return ERR_PTR(-ENOMEM);
>>
>> conf->dev = dev;
>> + if (attrs)
>> + conf->attrs = *attrs;
>>
>> return conf;
>> }
>> -EXPORT_SYMBOL_GPL(vb2_dma_contig_init_ctx);
>> +EXPORT_SYMBOL_GPL(vb2_dma_contig_init_ctx_attrs);
>>
>> void vb2_dma_contig_cleanup_ctx(void *alloc_ctx)
>> {
>> diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
>> index 5f9526f..0424cdc 100644
>> --- a/include/media/v4l2-ctrls.h
>> +++ b/include/media/v4l2-ctrls.h
>> @@ -46,6 +46,7 @@ struct poll_table_struct;
>> * @p_u16: Pointer to a 16-bit unsigned value.
>> * @p_u32: Pointer to a 32-bit unsigned value.
>> * @p_char: Pointer to a string.
>> + * @p_vp8_frame_hdr: Pointer to a struct
>> v4l2_ctrl_vp8_frame_hdr.
>> * @p: Pointer to a compound value.
>> */
>> union v4l2_ctrl_ptr {
>> @@ -55,6 +56,7 @@ union v4l2_ctrl_ptr {
>> u16 *p_u16;
>> u32 *p_u32;
>> char *p_char;
>> + struct v4l2_ctrl_vp8_frame_hdr *p_vp8_frame_hdr;
>> void *p;
>> };
>>
>> diff --git a/include/media/videobuf2-dma-contig.h
>> b/include/media/videobuf2-dma-contig.h
>> index c33dfa6..2087c9a 100644
>> --- a/include/media/videobuf2-dma-contig.h
>> +++ b/include/media/videobuf2-dma-contig.h
>> @@ -16,6 +16,8 @@
>> #include <media/videobuf2-v4l2.h>
>> #include <linux/dma-mapping.h>
>>
>> +struct dma_attrs;
>> +
>> static inline dma_addr_t
>> vb2_dma_contig_plane_dma_addr(struct vb2_buffer *vb, unsigned int
>> plane_no)
>> {
>> @@ -24,7 +26,14 @@ vb2_dma_contig_plane_dma_addr(struct vb2_buffer
>> *vb, unsigned int plane_no)
>> return *addr;
>> }
>>
>> -void *vb2_dma_contig_init_ctx(struct device *dev);
>> +void *vb2_dma_contig_init_ctx_attrs(struct device *dev,
>> + struct dma_attrs *attrs);
>> +
>> +static inline void *vb2_dma_contig_init_ctx(struct device *dev)
>> +{
>> + return vb2_dma_contig_init_ctx_attrs(dev, NULL);
>> +}
>> +
>> void vb2_dma_contig_cleanup_ctx(void *alloc_ctx);
>>
>> extern const struct vb2_mem_ops vb2_dma_contig_memops;
>> diff --git a/include/uapi/linux/v4l2-controls.h
>> b/include/uapi/linux/v4l2-controls.h
>> index 2d225bc..63c65d9 100644
>> --- a/include/uapi/linux/v4l2-controls.h
>> +++ b/include/uapi/linux/v4l2-controls.h
>> @@ -520,6 +520,7 @@ enum
>> v4l2_mpeg_video_h264_hierarchical_coding_type {
>> };
>> #define V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER (V
>> 4L2_CID_MPEG_BASE+381)
>> #define V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP
>> (V4L2_CID_MPEG_BASE+382)
>> +
>> #define V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP (V4L2_CID_MPEG_B
>> ASE+400)
>> #define V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP (V4L2_CID_MPEG_B
>> ASE+401)
>> #define V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP (V4L2_CID_MPEG_B
>> ASE+402)
>> @@ -578,6 +579,8 @@ enum v4l2_vp8_golden_frame_sel {
>> #define V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP (V4L2_CID_
>> MPEG_BASE+510)
>> #define V4L2_CID_MPEG_VIDEO_VPX_PROFILE (V4L2
>> _CID_MPEG_BASE+511)
>>
>> +#define V4L2_CID_MPEG_VIDEO_VP8_FRAME_HDR (V4L2_CID_M
>> PEG_BASE+512)
>> +
>> /* MPEG-class control IDs specific to the CX2341x driver as defined
>> by V4L2 */
>> #define V4L2_CID_MPEG_CX2341X_BASE (
>> V4L2_CTRL_CLASS_MPEG | 0x1000)
>> #define V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE (V4L
>> 2_CID_MPEG_CX2341X_BASE+0)
>> @@ -963,4 +966,99 @@ enum v4l2_detect_md_mode {
>> #define V4L2_CID_DETECT_MD_THRESHOLD_GRID (V4L2_CID_DETECT_CL
>> ASS_BASE + 3)
>> #define V4L2_CID_DETECT_MD_REGION_GRID (V4L2_CID_DETE
>> CT_CLASS_BASE + 4)
>>
>> +
>> +/* Complex controls */
>> +
>> +#define V4L2_VP8_SEGMNT_HDR_FLAG_ENABLED 0x01
>> +#define V4L2_VP8_SEGMNT_HDR_FLAG_UPDATE_MAP 0x02
>> +#define V4L2_VP8_SEGMNT_HDR_FLAG_UPDATE_FEATURE_DATA 0x04
>> +struct v4l2_vp8_sgmnt_hdr {
>> + __u8 segment_feature_mode;
>> +
>> + __s8 quant_update[4];
>> + __s8 lf_update[4];
>> + __u8 segment_probs[3];
>> +
>> + __u8 flags;
>> +};
>> +
>> +#define V4L2_VP8_LF_HDR_ADJ_ENABLE 0x01
>> +#define V4L2_VP8_LF_HDR_DELTA_UPDATE 0x02
>> +struct v4l2_vp8_loopfilter_hdr {
>> + __u8 type;
>> + __u8 level;
>> + __u8 sharpness_level;
>> + __s8 ref_frm_delta_magnitude[4];
>> + __s8 mb_mode_delta_magnitude[4];
>> +
>> + __u8 flags;
>> +};
>> +
>> +struct v4l2_vp8_quantization_hdr {
>> + __u8 y_ac_qi;
>> + __s8 y_dc_delta;
>> + __s8 y2_dc_delta;
>> + __s8 y2_ac_delta;
>> + __s8 uv_dc_delta;
>> + __s8 uv_ac_delta;
>> + __u16 dequant_factors[4][3][2];
>> +};
>> +
>> +struct v4l2_vp8_entropy_hdr {
>> + __u8 coeff_probs[4][8][3][11];
>> + __u8 y_mode_probs[4];
>> + __u8 uv_mode_probs[3];
>> + __u8 mv_probs[2][19];
>> +};
>> +
>> +#define V4L2_VP8_FRAME_HDR_FLAG_EXPERIMENTAL 0x01
>> +#define V4L2_VP8_FRAME_HDR_FLAG_SHOW_FRAME 0x02
>> +#define V4L2_VP8_FRAME_HDR_FLAG_MB_NO_SKIP_COEFF 0x04
>> +struct v4l2_ctrl_vp8_frame_hdr {
>> + /* 0: keyframe, 1: not a keyframe */
>> + __u8 key_frame;
>> + __u8 version;
>> +
>> + /* Populated also if not a key frame */
>> + __u16 width;
>> + __u8 horizontal_scale;
>> + __u16 height;
>> + __u8 vertical_scale;
>> +
>> + struct v4l2_vp8_sgmnt_hdr sgmnt_hdr;
>> + struct v4l2_vp8_loopfilter_hdr lf_hdr;
>> + struct v4l2_vp8_quantization_hdr quant_hdr;
>> + struct v4l2_vp8_entropy_hdr entropy_hdr;
>> +
>> + __u8 sign_bias_golden;
>> + __u8 sign_bias_alternate;
>> +
>> + __u8 prob_skip_false;
>> + __u8 prob_intra;
>> + __u8 prob_last;
>> + __u8 prob_gf;
>> +
>> + __u32 first_part_size;
>> + __u32 first_part_offset;
>> + /*
>> + * Offset in bits of MB data in first partition,
>> + * i.e. bit offset starting from first_part_offset.
>> + */
>> + __u32 macroblock_bit_offset;
>> +
>> + __u8 num_dct_parts;
>> + __u32 dct_part_sizes[8];
>> +
>> + __u8 bool_dec_range;
>> + __u8 bool_dec_value;
>> + __u8 bool_dec_count;
>> +
>> + /* v4l2_buffer indices of reference frames */
>> + __u32 last_frame;
>> + __u32 golden_frame;
>> + __u32 alt_frame;
>> +
>> + __u8 flags;
>> +};
>> +
>> #endif
>> diff --git a/include/uapi/linux/videodev2.h
>> b/include/uapi/linux/videodev2.h
>> index 29a6b78..191ca19 100644
>> --- a/include/uapi/linux/videodev2.h
>> +++ b/include/uapi/linux/videodev2.h
>> @@ -593,6 +593,7 @@ struct v4l2_pix_format {
>> #define V4L2_PIX_FMT_VC1_ANNEX_G v4l2_fourcc('V', 'C', '1', 'G') /*
>> SMPTE 421M Annex G compliant stream */
>> #define V4L2_PIX_FMT_VC1_ANNEX_L v4l2_fourcc('V', 'C', '1', 'L') /*
>> SMPTE 421M Annex L compliant stream */
>> #define V4L2_PIX_FMT_VP8 v4l2_fourcc('V', 'P', '8', '0') /* VP8
>> */
>> +#define V4L2_PIX_FMT_VP8_FRAME v4l2_fourcc('V', 'P', '8',
>> 'F') /* VP8 parsed frames */
>>
>> /* Vendor-specific formats */
>> #define V4L2_PIX_FMT_CPIA1 v4l2_fourcc('C', 'P', 'I', 'A') /*
>> cpia1 YUV */
>> @@ -1473,6 +1474,7 @@ struct v4l2_ext_control {
>> __u8 __user *p_u8;
>> __u16 __user *p_u16;
>> __u32 __user *p_u32;
>> + struct v4l2_ctrl_vp8_frame_hdr __user
>> *p_vp8_frame_hdr;
>> void __user *ptr;
>> };
>> } __attribute__ ((packed));
>> @@ -1517,6 +1519,9 @@ enum v4l2_ctrl_type {
>> V4L2_CTRL_TYPE_U8 = 0x0100,
>> V4L2_CTRL_TYPE_U16 = 0x0101,
>> V4L2_CTRL_TYPE_U32 = 0x0102,
>> + V4L2_CTRL_TYPE_VP8_FRAME_HDR = 0x108,
>> +
>> + V4L2_CTRL_TYPE_PRIVATE = 0xffff,
>> };
>>
>> /* Used in the VIDIOC_QUERYCTRL ioctl for querying controls */

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