diff options
Diffstat (limited to 'drivers/media/platform/coda.c')
| -rw-r--r-- | drivers/media/platform/coda.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/drivers/media/platform/coda.c b/drivers/media/platform/coda.c index 4a980e029ca..20827ba168f 100644 --- a/drivers/media/platform/coda.c +++ b/drivers/media/platform/coda.c @@ -178,6 +178,10 @@ struct coda_ctx { int idx; }; +static const u8 coda_filler_nal[14] = { 0x00, 0x00, 0x00, 0x01, 0x0c, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80 }; +static const u8 coda_filler_size[8] = { 0, 7, 14, 13, 12, 11, 10, 9 }; + static inline void coda_write(struct coda_dev *dev, u32 data, u32 reg) { v4l2_dbg(1, coda_debug, &dev->v4l2_dev, @@ -944,6 +948,24 @@ static int coda_alloc_framebuffers(struct coda_ctx *ctx, struct coda_q_data *q_d return 0; } +static int coda_h264_padding(int size, char *p) +{ + int nal_size; + int diff; + + diff = size - (size & ~0x7); + if (diff == 0) + return 0; + + nal_size = coda_filler_size[diff]; + memcpy(p, coda_filler_nal, nal_size); + + /* Add rbsp stop bit and trailing at the end */ + *(p + nal_size - 1) = 0x80; + + return nal_size; +} + static int coda_start_streaming(struct vb2_queue *q, unsigned int count) { struct coda_ctx *ctx = vb2_get_drv_priv(q); @@ -1171,7 +1193,15 @@ static int coda_start_streaming(struct vb2_queue *q, unsigned int count) coda_read(dev, CODA_CMD_ENC_HEADER_BB_START); memcpy(&ctx->vpu_header[1][0], vb2_plane_vaddr(buf, 0), ctx->vpu_header_size[1]); - ctx->vpu_header_size[2] = 0; + /* + * Length of H.264 headers is variable and thus it might not be + * aligned for the coda to append the encoded frame. In that is + * the case a filler NAL must be added to header 2. + */ + ctx->vpu_header_size[2] = coda_h264_padding( + (ctx->vpu_header_size[0] + + ctx->vpu_header_size[1]), + ctx->vpu_header[2]); break; case V4L2_PIX_FMT_MPEG4: /* |