generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add superframe support for frame parallel decoding.

Browse Source 
A superframe is a bunch of frames that bundled as one frame. It is mostly
used to combine one or more non-displayable frames and one displayable frame.

For frame parallel decoding, libvpx decoder will only support decoding one
normal frame or a super frame with superframe index.

If an application pass a superframe without superframe index or a chunk
of displayable frames without superframe index to libvpx decoder, libvpx
will not decode it in frame parallel mode. But libvpx decoder still could
decode it in serial mode.

Change-Id: I04c9f2c828373d64e880a8c7bcade5307015ce35
This commit is contained in:
hkuang 2014-06-13 14:14:02 -07:00
parent 374b21b277
commit 1eb6e683f2
1 changed files with 67 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

93
vp9/vp9_dx_iface.c
View File

@ -356,7 +356,8 @@ static vpx_codec_err_t decoder_decode(vpx_codec_alg_priv_t *ctx,
const uint8_t *data, unsigned int data_sz,
void *user_priv, long deadline) {
const uint8_t *data_start = data;
const uint8_t *const data_end = data + data_sz;
const uint8_t * const data_end = data + data_sz;
vpx_codec_err_t res;
uint32_t frame_sizes[8];
int frame_count;
@ -366,40 +367,80 @@ static vpx_codec_err_t decoder_decode(vpx_codec_alg_priv_t *ctx,
parse_superframe_index(data, data_sz, frame_sizes, &frame_count,
ctx->decrypt_cb, ctx->decrypt_state);
if (frame_count > 0) {
int i;
if (ctx->frame_parallel_decode) {
// Decode in frame parallel mode. When decoding in this mode, the frame
// passed to the decoder must be either a normal frame or a superframe with
// superframe index so the decoder could get each frame's start position
// in the superframe.
if (frame_count > 0) {
int i;
for (i = 0; i < frame_count; ++i) {
const uint8_t *data_start_copy = data_start;
const uint32_t frame_size = frame_sizes[i];
vpx_codec_err_t res;
if (data_start < data ||
frame_size > (uint32_t)(data_end - data_start)) {
ctx->base.err_detail = "Invalid frame size in index";
return VPX_CODEC_CORRUPT_FRAME;
for (i = 0; i < frame_count; ++i) {
const uint8_t *data_start_copy = data_start;
const uint32_t frame_size = frame_sizes[i];
vpx_codec_err_t res;
if (data_start < data
|| frame_size > (uint32_t) (data_end - data_start)) {
ctx->base.err_detail = "Invalid frame size in index";
return VPX_CODEC_CORRUPT_FRAME;
}
res = decode_one(ctx, &data_start_copy, frame_size, user_priv,
deadline);
if (res != VPX_CODEC_OK)
return res;
data_start += frame_size;
}
res = decode_one(ctx, &data_start_copy, frame_size, user_priv, deadline);
} else {
res = decode_one(ctx, &data_start, data_sz, user_priv, deadline);
if (res != VPX_CODEC_OK)
return res;
data_start += frame_size;
// Extra data detected after the frame.
if (data_start < data_end - 1) {
ctx->base.err_detail = "Fail to decode frame in parallel mode";
return VPX_CODEC_INCAPABLE;
}
}
} else {
while (data_start < data_end) {
const uint32_t frame_size = (uint32_t)(data_end - data_start);
const vpx_codec_err_t res = decode_one(ctx, &data_start, frame_size,
user_priv, deadline);
if (res != VPX_CODEC_OK)
return res;
// Decode in serial mode.
if (frame_count > 0) {
int i;
// Account for suboptimal termination by the encoder.
for (i = 0; i < frame_count; ++i) {
const uint8_t *data_start_copy = data_start;
const uint32_t frame_size = frame_sizes[i];
vpx_codec_err_t res;
if (data_start < data
|| frame_size > (uint32_t) (data_end - data_start)) {
ctx->base.err_detail = "Invalid frame size in index";
return VPX_CODEC_CORRUPT_FRAME;
}
res = decode_one(ctx, &data_start_copy, frame_size, user_priv,
deadline);
if (res != VPX_CODEC_OK)
return res;
data_start += frame_size;
}
} else {
while (data_start < data_end) {
const uint8_t marker = read_marker(ctx->decrypt_cb, ctx->decrypt_state,
data_start);
if (marker)
break;
++data_start;
const uint32_t frame_size = (uint32_t) (data_end - data_start);
const vpx_codec_err_t res = decode_one(ctx, &data_start, frame_size,
user_priv, deadline);
if (res != VPX_CODEC_OK)
return res;
// Account for suboptimal termination by the encoder.
while (data_start < data_end) {
const uint8_t marker = read_marker(ctx->decrypt_cb,
ctx->decrypt_state, data_start);
if (marker)
break;
++data_start;
}
}
}
}