diff options
Diffstat (limited to 'drivers/media/platform/coda/coda-bit.c')
-rw-r--r-- | drivers/media/platform/coda/coda-bit.c | 59 |
1 files changed, 56 insertions, 3 deletions
diff --git a/drivers/media/platform/coda/coda-bit.c b/drivers/media/platform/coda/coda-bit.c index 4f96f808b4dd..5a1016243032 100644 --- a/drivers/media/platform/coda/coda-bit.c +++ b/drivers/media/platform/coda/coda-bit.c @@ -180,7 +180,7 @@ static void coda_kfifo_sync_to_device_write(struct coda_ctx *ctx) coda_write(dev, wr_ptr, CODA_REG_BIT_WR_PTR(ctx->reg_idx)); } -static int coda_bitstream_pad(struct coda_ctx *ctx, u32 size) +static int coda_h264_bitstream_pad(struct coda_ctx *ctx, u32 size) { unsigned char *buf; u32 n; @@ -206,12 +206,34 @@ static int coda_bitstream_queue(struct coda_ctx *ctx, const u8 *buf, u32 size) return (n < size) ? -ENOSPC : 0; } +static u32 coda_buffer_parse_headers(struct coda_ctx *ctx, + struct vb2_v4l2_buffer *src_buf, + u32 payload) +{ + u8 *vaddr = vb2_plane_vaddr(&src_buf->vb2_buf, 0); + u32 size = 0; + + switch (ctx->codec->src_fourcc) { + case V4L2_PIX_FMT_MPEG2: + size = coda_mpeg2_parse_headers(ctx, vaddr, payload); + break; + case V4L2_PIX_FMT_MPEG4: + size = coda_mpeg4_parse_headers(ctx, vaddr, payload); + break; + default: + break; + } + + return size; +} + static bool coda_bitstream_try_queue(struct coda_ctx *ctx, struct vb2_v4l2_buffer *src_buf) { unsigned long payload = vb2_get_plane_payload(&src_buf->vb2_buf, 0); u8 *vaddr = vb2_plane_vaddr(&src_buf->vb2_buf, 0); int ret; + int i; if (coda_get_bitstream_payload(ctx) + payload + 512 >= ctx->bitstream.size) @@ -222,10 +244,41 @@ static bool coda_bitstream_try_queue(struct coda_ctx *ctx, return true; } - /* Add zero padding before the first H.264 buffer, if it is too small */ + if (ctx->qsequence == 0 && payload < 512) { + /* + * Add padding after the first buffer, if it is too small to be + * fetched by the CODA, by repeating the headers. Without + * repeated headers, or the first frame already queued, decoder + * sequence initialization fails with error code 0x2000 on i.MX6 + * or error code 0x1 on i.MX51. + */ + u32 header_size = coda_buffer_parse_headers(ctx, src_buf, + payload); + + if (header_size) { + coda_dbg(1, ctx, "pad with %u-byte header\n", + header_size); + for (i = payload; i < 512; i += header_size) { + ret = coda_bitstream_queue(ctx, vaddr, + header_size); + if (ret < 0) { + v4l2_err(&ctx->dev->v4l2_dev, + "bitstream buffer overflow\n"); + return false; + } + if (ctx->dev->devtype->product == CODA_960) + break; + } + } else { + coda_dbg(1, ctx, + "could not parse header, sequence initialization might fail\n"); + } + } + + /* Add padding before the first buffer, if it is too small */ if (ctx->qsequence == 0 && payload < 512 && ctx->codec->src_fourcc == V4L2_PIX_FMT_H264) - coda_bitstream_pad(ctx, 512 - payload); + coda_h264_bitstream_pad(ctx, 512 - payload); ret = coda_bitstream_queue(ctx, vaddr, payload); if (ret < 0) { |