diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/platform/coda/coda-bit.c | 59 | ||||
| -rw-r--r-- | drivers/media/platform/coda/coda-mpeg2.c | 43 | ||||
| -rw-r--r-- | drivers/media/platform/coda/coda-mpeg4.c | 38 | ||||
| -rw-r--r-- | drivers/media/platform/coda/coda.h | 2 |
4 files changed, 139 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) { diff --git a/drivers/media/platform/coda/coda-mpeg2.c b/drivers/media/platform/coda/coda-mpeg2.c index 73e50dabce19..6f3f6721d286 100644 --- a/drivers/media/platform/coda/coda-mpeg2.c +++ b/drivers/media/platform/coda/coda-mpeg2.c @@ -42,3 +42,46 @@ int coda_mpeg2_level(int level_idc) return -EINVAL; } } + +/* + * Check if the buffer starts with the MPEG-2 sequence header (with or without + * quantization matrix) and extension header, for example: + * + * 00 00 01 b3 2d 01 e0 34 08 8b a3 81 + * 10 11 11 12 12 12 13 13 13 13 14 14 14 14 14 15 + * 15 15 15 15 15 16 16 16 16 16 16 16 17 17 17 17 + * 17 17 17 17 18 18 18 19 18 18 18 19 1a 1a 1a 1a + * 19 1b 1b 1b 1b 1b 1c 1c 1c 1c 1e 1e 1e 1f 1f 21 + * 00 00 01 b5 14 8a 00 01 00 00 + * + * or: + * + * 00 00 01 b3 08 00 40 15 ff ff e0 28 + * 00 00 01 b5 14 8a 00 01 00 00 + * + * Returns the detected header size in bytes or 0. + */ +u32 coda_mpeg2_parse_headers(struct coda_ctx *ctx, u8 *buf, u32 size) +{ + static const u8 sequence_header_start[4] = { 0x00, 0x00, 0x01, 0xb3 }; + static const union { + u8 extension_start[4]; + u8 start_code_prefix[3]; + } u = { { 0x00, 0x00, 0x01, 0xb5 } }; + + if (size < 22 || + memcmp(buf, sequence_header_start, 4) != 0) + return 0; + + if ((size == 22 || + (size >= 25 && memcmp(buf + 22, u.start_code_prefix, 3) == 0)) && + memcmp(buf + 12, u.extension_start, 4) == 0) + return 22; + + if ((size == 86 || + (size > 89 && memcmp(buf + 86, u.start_code_prefix, 3) == 0)) && + memcmp(buf + 76, u.extension_start, 4) == 0) + return 86; + + return 0; +} diff --git a/drivers/media/platform/coda/coda-mpeg4.c b/drivers/media/platform/coda/coda-mpeg4.c index c3aca763c320..483a4fba1b4f 100644 --- a/drivers/media/platform/coda/coda-mpeg4.c +++ b/drivers/media/platform/coda/coda-mpeg4.c @@ -47,3 +47,41 @@ int coda_mpeg4_level(int level_idc) return -EINVAL; } } + +/* + * Check if the buffer starts with the MPEG-4 visual object sequence and visual + * object headers, for example: + * + * 00 00 01 b0 f1 + * 00 00 01 b5 a9 13 00 00 01 00 00 00 01 20 08 + * d4 8d 88 00 f5 04 04 08 14 30 3f + * + * Returns the detected header size in bytes or 0. + */ +u32 coda_mpeg4_parse_headers(struct coda_ctx *ctx, u8 *buf, u32 size) +{ + static const u8 vos_start[4] = { 0x00, 0x00, 0x01, 0xb0 }; + static const union { + u8 vo_start[4]; + u8 start_code_prefix[3]; + } u = { { 0x00, 0x00, 0x01, 0xb5 } }; + + if (size < 30 || + memcmp(buf, vos_start, 4) != 0 || + memcmp(buf + 5, u.vo_start, 4) != 0) + return 0; + + if (size == 30 || + (size >= 33 && memcmp(buf + 30, u.start_code_prefix, 3) == 0)) + return 30; + + if (size == 31 || + (size >= 34 && memcmp(buf + 31, u.start_code_prefix, 3) == 0)) + return 31; + + if (size == 32 || + (size >= 35 && memcmp(buf + 32, u.start_code_prefix, 3) == 0)) + return 32; + + return 0; +} diff --git a/drivers/media/platform/coda/coda.h b/drivers/media/platform/coda/coda.h index 10207e9534c2..12bbd3129269 100644 --- a/drivers/media/platform/coda/coda.h +++ b/drivers/media/platform/coda/coda.h @@ -338,8 +338,10 @@ int coda_h264_sps_fixup(struct coda_ctx *ctx, int width, int height, char *buf, int coda_mpeg2_profile(int profile_idc); int coda_mpeg2_level(int level_idc); +u32 coda_mpeg2_parse_headers(struct coda_ctx *ctx, u8 *buf, u32 size); int coda_mpeg4_profile(int profile_idc); int coda_mpeg4_level(int level_idc); +u32 coda_mpeg4_parse_headers(struct coda_ctx *ctx, u8 *buf, u32 size); void coda_update_profile_level_ctrls(struct coda_ctx *ctx, u8 profile_idc, u8 level_idc); |