#define CACHED_BITSTREAM_READER !ARCH_X86_32
#include "libavutil/pixdesc.h"
-#include "libavutil/qsort.h"
#include "avcodec.h"
#include "bytestream.h"
} Prediction;
typedef struct HuffEntry {
- uint16_t sym;
uint8_t len;
- uint32_t code;
+ uint16_t sym;
} HuffEntry;
typedef struct MagicYUVContext {
int color_matrix; // video color matrix
int flags;
int interlaced; // video is interlaced
- uint8_t *buf; // pointer to AVPacket->data
+ const uint8_t *buf; // pointer to AVPacket->data
int hshift[4];
int vshift[4];
Slice *slices[4]; // slice bitstream positions for each plane
unsigned int slices_size[4]; // slice sizes for each plane
- uint8_t len[4096]; // scratch table of code lengths
VLC vlc[4]; // VLC for each plane
int (*magy_decode_slice)(AVCodecContext *avctx, void *tdata,
int j, int threadnr);
LLVidDSPContext llviddsp;
} MagicYUVContext;
-static int huff_cmp_len(const void *a, const void *b)
-{
- const HuffEntry *aa = a, *bb = b;
- return (aa->len - bb->len) * 4096 + bb->sym - aa->sym;
-}
-
-static int huff_build(VLC *vlc, uint8_t *len, int nb_elems)
+static int huff_build(const uint8_t len[], uint16_t codes_pos[33],
+ VLC *vlc, int nb_elems, void *logctx)
{
HuffEntry he[4096];
- uint32_t code;
- int i;
- for (i = 0; i < nb_elems; i++) {
- he[i].sym = i;
- he[i].len = len[i];
- if (len[i] == 0 || len[i] > 32)
- return AVERROR_INVALIDDATA;
- }
- AV_QSORT(he, nb_elems, HuffEntry, huff_cmp_len);
+ for (int i = 31; i > 0; i--)
+ codes_pos[i] += codes_pos[i + 1];
- code = 1;
- for (i = nb_elems - 1; i >= 0; i--) {
- he[i].code = code >> (32 - he[i].len);
- code += 0x80000000u >> (he[i].len - 1);
- }
+ for (unsigned i = nb_elems; i-- > 0;)
+ he[--codes_pos[len[i]]] = (HuffEntry){ len[i], i };
ff_free_vlc(vlc);
- return ff_init_vlc_sparse(vlc, FFMIN(he[nb_elems - 1].len, 12), nb_elems,
- &he[0].len, sizeof(he[0]), sizeof(he[0].len),
- &he[0].code, sizeof(he[0]), sizeof(he[0].code),
- &he[0].sym, sizeof(he[0]), sizeof(he[0].sym), 0);
+ return ff_init_vlc_from_lengths(vlc, FFMIN(he[0].len, 12), nb_elems,
+ &he[0].len, sizeof(he[0]),
+ &he[0].sym, sizeof(he[0]), sizeof(he[0].sym),
+ 0, 0, logctx);
}
static void magicyuv_median_pred16(uint16_t *dst, const uint16_t *src1,
int sheight = AV_CEIL_RSHIFT(s->slice_height, s->vshift[i]);
ptrdiff_t fake_stride = p->linesize[i] * (1 + interlaced);
ptrdiff_t stride = p->linesize[i];
+ const uint8_t *slice = s->buf + s->slices[i][j].start;
int flags, pred;
- int ret = init_get_bits8(&gb, s->buf + s->slices[i][j].start,
- s->slices[i][j].size);
- if (ret < 0)
- return ret;
-
- flags = get_bits(&gb, 8);
- pred = get_bits(&gb, 8);
+ flags = bytestream_get_byte(&slice);
+ pred = bytestream_get_byte(&slice);
dst = p->data[i] + j * sheight * stride;
if (flags & 1) {
- if (get_bits_left(&gb) < 8* width * height)
+ if (s->slices[i][j].size - 2 < width * height)
return AVERROR_INVALIDDATA;
for (k = 0; k < height; k++) {
- for (x = 0; x < width; x++)
- dst[x] = get_bits(&gb, 8);
-
+ bytestream_get_buffer(&slice, dst, width);
dst += stride;
}
} else {
+ int ret = init_get_bits8(&gb, slice, s->slices[i][j].size - 2);
+
+ if (ret < 0)
+ return ret;
+
for (k = 0; k < height; k++) {
for (x = 0; x < width; x++) {
int pix;
return 0;
}
-static int build_huffman(AVCodecContext *avctx, GetBitContext *gbit, int max)
+static int build_huffman(AVCodecContext *avctx, const uint8_t *table,
+ int table_size, int max)
{
MagicYUVContext *s = avctx->priv_data;
+ GetByteContext gb;
+ uint8_t len[4096];
+ uint16_t length_count[33] = { 0 };
int i = 0, j = 0, k;
- while (get_bits_left(gbit) >= 8) {
- int b = get_bits(gbit, 1);
- int x = get_bits(gbit, 7);
- int l = get_bitsz(gbit, b * 8) + 1;
+ bytestream2_init(&gb, table, table_size);
+
+ while (bytestream2_get_bytes_left(&gb) > 0) {
+ int b = bytestream2_peek_byteu(&gb) & 0x80;
+ int x = bytestream2_get_byteu(&gb) & ~0x80;
+ int l = 1;
+ if (b) {
+ if (bytestream2_get_bytes_left(&gb) <= 0)
+ break;
+ l += bytestream2_get_byteu(&gb);
+ }
k = j + l;
- if (k > max) {
+ if (k > max || x == 0 || x > 32) {
av_log(avctx, AV_LOG_ERROR, "Invalid Huffman codes\n");
return AVERROR_INVALIDDATA;
}
+ length_count[x] += l;
for (; j < k; j++)
- s->len[j] = x;
+ len[j] = x;
if (j == max) {
j = 0;
- if (huff_build(&s->vlc[i], s->len, max)) {
+ if (huff_build(len, length_count, &s->vlc[i], max, avctx)) {
av_log(avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n");
return AVERROR_INVALIDDATA;
}
if (i == s->planes) {
break;
}
+ memset(length_count, 0, sizeof(length_count));
}
}
MagicYUVContext *s = avctx->priv_data;
ThreadFrame frame = { .f = data };
AVFrame *p = data;
- GetByteContext gbyte;
- GetBitContext gbit;
+ GetByteContext gb;
uint32_t first_offset, offset, next_offset, header_size, slice_width;
int width, height, format, version, table_size;
int ret, i, j;
- bytestream2_init(&gbyte, avpkt->data, avpkt->size);
- if (bytestream2_get_le32(&gbyte) != MKTAG('M', 'A', 'G', 'Y'))
+ if (avpkt->size < 36)
+ return AVERROR_INVALIDDATA;
+
+ bytestream2_init(&gb, avpkt->data, avpkt->size);
+ if (bytestream2_get_le32u(&gb) != MKTAG('M', 'A', 'G', 'Y'))
return AVERROR_INVALIDDATA;
- header_size = bytestream2_get_le32(&gbyte);
+ header_size = bytestream2_get_le32u(&gb);
if (header_size < 32 || header_size >= avpkt->size) {
av_log(avctx, AV_LOG_ERROR,
"header or packet too small %"PRIu32"\n", header_size);
return AVERROR_INVALIDDATA;
}
- version = bytestream2_get_byte(&gbyte);
+ version = bytestream2_get_byteu(&gb);
if (version != 7) {
avpriv_request_sample(avctx, "Version %d", version);
return AVERROR_PATCHWELCOME;
s->decorrelate = 0;
s->bps = 8;
- format = bytestream2_get_byte(&gbyte);
+ format = bytestream2_get_byteu(&gb);
switch (format) {
case 0x65:
avctx->pix_fmt = AV_PIX_FMT_GBRP;
avctx->pix_fmt = AV_PIX_FMT_GRAY10;
s->bps = 10;
break;
+ case 0x7b:
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
+ s->hshift[1] =
+ s->vshift[1] =
+ s->hshift[2] =
+ s->vshift[2] = 1;
+ s->bps = 10;
+ break;
default:
avpriv_request_sample(avctx, "Format 0x%X", format);
return AVERROR_PATCHWELCOME;
s->magy_decode_slice = s->bps == 8 ? magy_decode_slice : magy_decode_slice10;
s->planes = av_pix_fmt_count_planes(avctx->pix_fmt);
- bytestream2_skip(&gbyte, 1);
- s->color_matrix = bytestream2_get_byte(&gbyte);
- s->flags = bytestream2_get_byte(&gbyte);
+ bytestream2_skipu(&gb, 1);
+ s->color_matrix = bytestream2_get_byteu(&gb);
+ s->flags = bytestream2_get_byteu(&gb);
s->interlaced = !!(s->flags & 2);
- bytestream2_skip(&gbyte, 3);
+ bytestream2_skipu(&gb, 3);
- width = bytestream2_get_le32(&gbyte);
- height = bytestream2_get_le32(&gbyte);
+ width = bytestream2_get_le32u(&gb);
+ height = bytestream2_get_le32u(&gb);
ret = ff_set_dimensions(avctx, width, height);
if (ret < 0)
return ret;
- slice_width = bytestream2_get_le32(&gbyte);
+ slice_width = bytestream2_get_le32u(&gb);
if (slice_width != avctx->coded_width) {
avpriv_request_sample(avctx, "Slice width %"PRIu32, slice_width);
return AVERROR_PATCHWELCOME;
}
- s->slice_height = bytestream2_get_le32(&gbyte);
+ s->slice_height = bytestream2_get_le32u(&gb);
if (s->slice_height <= 0 || s->slice_height > INT_MAX - avctx->coded_height) {
av_log(avctx, AV_LOG_ERROR,
"invalid slice height: %d\n", s->slice_height);
return AVERROR_INVALIDDATA;
}
- bytestream2_skip(&gbyte, 4);
+ bytestream2_skipu(&gb, 4);
s->nb_slices = (avctx->coded_height + s->slice_height - 1) / s->slice_height;
- if (s->nb_slices > INT_MAX / sizeof(Slice)) {
+ if (s->nb_slices > INT_MAX / FFMAX(sizeof(Slice), 4 * 5)) {
av_log(avctx, AV_LOG_ERROR,
"invalid number of slices: %d\n", s->nb_slices);
return AVERROR_INVALIDDATA;
}
}
+ if (bytestream2_get_bytes_left(&gb) <= s->nb_slices * s->planes * 5)
+ return AVERROR_INVALIDDATA;
for (i = 0; i < s->planes; i++) {
av_fast_malloc(&s->slices[i], &s->slices_size[i], s->nb_slices * sizeof(Slice));
if (!s->slices[i])
return AVERROR(ENOMEM);
- offset = bytestream2_get_le32(&gbyte);
+ offset = bytestream2_get_le32u(&gb);
if (offset >= avpkt->size - header_size)
return AVERROR_INVALIDDATA;
for (j = 0; j < s->nb_slices - 1; j++) {
s->slices[i][j].start = offset + header_size;
- next_offset = bytestream2_get_le32(&gbyte);
+ next_offset = bytestream2_get_le32u(&gb);
if (next_offset <= offset || next_offset >= avpkt->size - header_size)
return AVERROR_INVALIDDATA;
s->slices[i][j].size = next_offset - offset;
+ if (s->slices[i][j].size < 2)
+ return AVERROR_INVALIDDATA;
offset = next_offset;
}
s->slices[i][j].start = offset + header_size;
s->slices[i][j].size = avpkt->size - s->slices[i][j].start;
+
+ if (s->slices[i][j].size < 2)
+ return AVERROR_INVALIDDATA;
}
- if (bytestream2_get_byte(&gbyte) != s->planes)
+ if (bytestream2_get_byteu(&gb) != s->planes)
return AVERROR_INVALIDDATA;
- bytestream2_skip(&gbyte, s->nb_slices * s->planes);
+ bytestream2_skipu(&gb, s->nb_slices * s->planes);
- table_size = header_size + first_offset - bytestream2_tell(&gbyte);
+ table_size = header_size + first_offset - bytestream2_tell(&gb);
if (table_size < 2)
return AVERROR_INVALIDDATA;
- ret = init_get_bits8(&gbit, avpkt->data + bytestream2_tell(&gbyte), table_size);
- if (ret < 0)
- return ret;
-
- ret = build_huffman(avctx, &gbit, s->max);
+ ret = build_huffman(avctx, avpkt->data + bytestream2_tell(&gb),
+ table_size, s->max);
if (ret < 0)
return ret;
return 0;
}
-AVCodec ff_magicyuv_decoder = {
+const AVCodec ff_magicyuv_decoder = {
.name = "magicyuv",
.long_name = NULL_IF_CONFIG_SMALL("MagicYUV video"),
.type = AVMEDIA_TYPE_VIDEO,
projects / ffmpeg / blobdiff