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avcodec/utvideo: add support for UQY2

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2016-06-11 18:17:41 +02:00
parent b21f674876
commit 115e63c8d6
3 changed files with 244 additions and 42 deletions
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6
libavcodec/utvideo.c
View File

@ -39,3 +39,9 @@ int ff_ut_huff_cmp_len(const void *a, const void *b)
const HuffEntry *aa = a, *bb = b;
return (aa->len - bb->len)*256 + aa->sym - bb->sym;
}
int ff_ut10_huff_cmp_len(const void *a, const void *b)
{
const HuffEntry *aa = a, *bb = b;
return (aa->len - bb->len)*1024 + aa->sym - bb->sym;
}

4
libavcodec/utvideo.h
View File

@ -76,6 +76,7 @@ typedef struct UtvideoContext {
int compression;
int interlaced;
int frame_pred;
int pro;
int slice_stride;
uint8_t *slice_bits, *slice_buffer[4];
@ -83,12 +84,13 @@ typedef struct UtvideoContext {
} UtvideoContext;
typedef struct HuffEntry {
uint8_t sym;
uint16_t sym;
uint8_t len;
uint32_t code;
} HuffEntry;
/* Compare huffman tree nodes */
int ff_ut_huff_cmp_len(const void *a, const void *b);
int ff_ut10_huff_cmp_len(const void *a, const void *b);
#endif /* AVCODEC_UTVIDEO_H */

208
libavcodec/utvideodec.c
View File

@ -35,6 +35,50 @@
#include "thread.h"
#include "utvideo.h"
static int build_huff10(const uint8_t *src, VLC *vlc, int *fsym)
{
int i;
HuffEntry he[1024];
int last;
uint32_t codes[1024];
uint8_t bits[1024];
uint16_t syms[1024];
uint32_t code;
*fsym = -1;
for (i = 0; i < 1024; i++) {
he[i].sym = i;
he[i].len = *src++;
}
qsort(he, 1024, sizeof(*he), ff_ut10_huff_cmp_len);
if (!he[0].len) {
*fsym = he[0].sym;
return 0;
}
last = 1023;
while (he[last].len == 255 && last)
last--;
if (he[last].len > 32) {
return -1;
}
code = 1;
for (i = last; i >= 0; i--) {
codes[i] = code >> (32 - he[i].len);
bits[i] = he[i].len;
syms[i] = he[i].sym;
code += 0x80000000u >> (he[i].len - 1);
}
return ff_init_vlc_sparse(vlc, FFMIN(he[last].len, 11), last + 1,
bits, sizeof(*bits), sizeof(*bits),
codes, sizeof(*codes), sizeof(*codes),
syms, sizeof(*syms), sizeof(*syms), 0);
}
static int build_huff(const uint8_t *src, VLC *vlc, int *fsym)
{
int i;
@ -78,6 +122,110 @@ static int build_huff(const uint8_t *src, VLC *vlc, int *fsym)
syms, sizeof(*syms), sizeof(*syms), 0);
}
static int decode_plane10(UtvideoContext *c, int plane_no,
uint16_t *dst, int step, int stride,
int width, int height,
const uint8_t *src, const uint8_t *huff,
int use_pred)
{
int i, j, slice, pix, ret;
int sstart, send;
VLC vlc;
GetBitContext gb;
int prev, fsym;
if ((ret = build_huff10(huff, &vlc, &fsym)) < 0) {
av_log(c->avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n");
return ret;
}
if (fsym >= 0) { // build_huff reported a symbol to fill slices with
send = 0;
for (slice = 0; slice < c->slices; slice++) {
uint16_t *dest;
sstart = send;
send = (height * (slice + 1) / c->slices);
dest = dst + sstart * stride;
prev = 0x200;
for (j = sstart; j < send; j++) {
for (i = 0; i < width * step; i += step) {
pix = fsym;
if (use_pred) {
prev += pix;
pix = prev;
}
dest[i] = pix;
}
dest += stride;
}
}
return 0;
}
send = 0;
for (slice = 0; slice < c->slices; slice++) {
uint16_t *dest;
int slice_data_start, slice_data_end, slice_size;
sstart = send;
send = (height * (slice + 1) / c->slices);
dest = dst + sstart * stride;
// slice offset and size validation was done earlier
slice_data_start = slice ? AV_RL32(src + slice * 4 - 4) : 0;
slice_data_end = AV_RL32(src + slice * 4);
slice_size = slice_data_end - slice_data_start;
if (!slice_size) {
av_log(c->avctx, AV_LOG_ERROR, "Plane has more than one symbol "
"yet a slice has a length of zero.\n");
goto fail;
}
memcpy(c->slice_bits, src + slice_data_start + c->slices * 4,
slice_size);
memset(c->slice_bits + slice_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
c->bdsp.bswap_buf((uint32_t *) c->slice_bits,
(uint32_t *) c->slice_bits,
(slice_data_end - slice_data_start + 3) >> 2);
init_get_bits(&gb, c->slice_bits, slice_size * 8);
prev = 0x200;
for (j = sstart; j < send; j++) {
for (i = 0; i < width * step; i += step) {
if (get_bits_left(&gb) <= 0) {
av_log(c->avctx, AV_LOG_ERROR,
"Slice decoding ran out of bits\n");
goto fail;
}
pix = get_vlc2(&gb, vlc.table, vlc.bits, 3);
if (pix < 0) {
av_log(c->avctx, AV_LOG_ERROR, "Decoding error\n");
goto fail;
}
if (use_pred) {
prev += pix;
prev &= 0x3FF;
pix = prev;
}
dest[i] = pix;
}
dest += stride;
}
if (get_bits_left(&gb) > 32)
av_log(c->avctx, AV_LOG_WARNING,
"%d bits left after decoding slice\n", get_bits_left(&gb));
}
ff_free_vlc(&vlc);
return 0;
fail:
ff_free_vlc(&vlc);
return AVERROR_INVALIDDATA;
}
static int decode_plane(UtvideoContext *c, int plane_no,
uint8_t *dst, int step, int stride,
int width, int height,
@ -345,6 +493,30 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
/* parse plane structure to get frame flags and validate slice offsets */
bytestream2_init(&gb, buf, buf_size);
if (c->pro) {
c->frame_info = bytestream2_get_le32u(&gb);
c->slices = ((c->frame_info >> 24) & 0xff) + 1;
for (i = 0; i < c->planes; i++) {
plane_size = 0;
plane_start[i] = gb.buffer;
if (bytestream2_get_bytes_left(&gb) < 1024 + 4 * c->slices) {
av_log(avctx, AV_LOG_ERROR, "Insufficient data for a plane\n");
return AVERROR_INVALIDDATA;
}
for (j = 0; j < c->slices; j++) {
slice_size = bytestream2_get_le32u(&gb);
max_slice_size = FFMAX(max_slice_size, slice_size);
plane_size += slice_size;
}
bytestream2_skipu(&gb, 1024);
bytestream2_skipu(&gb, plane_size);
}
plane_start[c->planes] = gb.buffer;
if (bytestream2_get_bytes_left(&gb) < c->frame_info_size) {
av_log(avctx, AV_LOG_ERROR, "Not enough data for frame information\n");
return AVERROR_INVALIDDATA;
}
} else {
for (i = 0; i < c->planes; i++) {
plane_start[i] = gb.buffer;
if (bytestream2_get_bytes_left(&gb) < 256 + 4 * c->slices) {
@ -374,6 +546,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
return AVERROR_INVALIDDATA;
}
c->frame_info = bytestream2_get_le32u(&gb);
}
av_log(avctx, AV_LOG_DEBUG, "frame information flags %"PRIX32"\n",
c->frame_info);
@ -459,6 +632,15 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
}
}
break;
case AV_PIX_FMT_YUV422P10:
for (i = 0; i < 3; i++) {
ret = decode_plane10(c, i, (uint16_t *)frame.f->data[i], 1, frame.f->linesize[i] / 2,
avctx->width >> !!i, avctx->height,
plane_start[i], plane_start[i + 1] - 1024, c->frame_pred == PRED_LEFT);
if (ret)
return ret;
}
break;
}
frame.f->key_frame = 1;
@ -479,13 +661,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
ff_bswapdsp_init(&c->bdsp);
if (avctx->extradata_size < 16) {
av_log(avctx, AV_LOG_ERROR,
"Insufficient extradata size %d, should be at least 16\n",
avctx->extradata_size);
return AVERROR_INVALIDDATA;
}
if (avctx->extradata_size >= 16) {
av_log(avctx, AV_LOG_DEBUG, "Encoder version %d.%d.%d.%d\n",
avctx->extradata[3], avctx->extradata[2],
avctx->extradata[1], avctx->extradata[0]);
@ -500,6 +676,20 @@ static av_cold int decode_init(AVCodecContext *avctx)
c->slices = (c->flags >> 24) + 1;
c->compression = c->flags & 1;
c->interlaced = c->flags & 0x800;
} else if (avctx->extradata_size == 8) {
av_log(avctx, AV_LOG_DEBUG, "Encoder version %d.%d.%d.%d\n",
avctx->extradata[3], avctx->extradata[2],
avctx->extradata[1], avctx->extradata[0]);
av_log(avctx, AV_LOG_DEBUG, "Original format %"PRIX32"\n",
AV_RB32(avctx->extradata + 4));
c->interlaced = 0;
c->pro = 1;
} else {
av_log(avctx, AV_LOG_ERROR,
"Insufficient extradata size %d, should be at least 16\n",
avctx->extradata_size);
return AVERROR_INVALIDDATA;
}
c->slice_bits_size = 0;
@ -522,6 +712,10 @@ static av_cold int decode_init(AVCodecContext *avctx)
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
avctx->colorspace = AVCOL_SPC_BT470BG;
break;
case MKTAG('U', 'Q', 'Y', '2'):
c->planes = 3;
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
break;
case MKTAG('U', 'L', 'H', '0'):
c->planes = 3;
avctx->pix_fmt = AV_PIX_FMT_YUV420P;