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Code Issues Releases Activity

avcodec/hq_hqa: Remove transient GetByteContext from context

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Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2022-07-22 22:58:10 +02:00
parent 81ebf40efa
commit f3fef1259c
2 changed files with 25 additions and 25 deletions
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48
libavcodec/hq_hqa.c
View File

@@ -24,6 +24,7 @@
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "bytestream.h"
#include "canopus.h"
#include "codec_internal.h"
#include "get_bits.h"
@@ -114,12 +115,12 @@ static int hq_decode_mb(HQContext *c, AVFrame *pic,
return 0;
}
static int hq_decode_frame(HQContext *ctx, AVFrame *pic,
static int hq_decode_frame(HQContext *ctx, AVFrame *pic, GetByteContext *gbc,
int prof_num, size_t data_size)
{
const HQProfile *profile;
GetBitContext gb;
const uint8_t *perm, *src = ctx->gbc.buffer;
const uint8_t *perm, *src = gbc->buffer;
uint32_t slice_off[21];
int slice, start_off, next_off, i, ret;
@@ -144,7 +145,7 @@ static int hq_decode_frame(HQContext *ctx, AVFrame *pic,
/* Offsets are stored from CUV position, so adjust them accordingly. */
for (i = 0; i < profile->num_slices + 1; i++)
slice_off[i] = bytestream2_get_be24(&ctx->gbc) - 4;
slice_off[i] = bytestream2_get_be24(gbc) - 4;
next_off = 0;
for (slice = 0; slice < profile->num_slices; slice++) {
@@ -240,20 +241,20 @@ static int hqa_decode_slice(HQContext *ctx, AVFrame *pic, GetBitContext *gb,
return 0;
}
static int hqa_decode_frame(HQContext *ctx, AVFrame *pic, size_t data_size)
static int hqa_decode_frame(HQContext *ctx, AVFrame *pic, GetByteContext *gbc, size_t data_size)
{
GetBitContext gb;
const int num_slices = 8;
uint32_t slice_off[9];
int i, slice, ret;
int width, height, quant;
const uint8_t *src = ctx->gbc.buffer;
const uint8_t *src = gbc->buffer;
if (bytestream2_get_bytes_left(&ctx->gbc) < 8 + 4*(num_slices + 1))
if (bytestream2_get_bytes_left(gbc) < 8 + 4*(num_slices + 1))
return AVERROR_INVALIDDATA;
width = bytestream2_get_be16(&ctx->gbc);
height = bytestream2_get_be16(&ctx->gbc);
width = bytestream2_get_be16(gbc);
height = bytestream2_get_be16(gbc);
ret = ff_set_dimensions(ctx->avctx, width, height);
if (ret < 0)
@@ -266,8 +267,8 @@ static int hqa_decode_frame(HQContext *ctx, AVFrame *pic, size_t data_size)
av_log(ctx->avctx, AV_LOG_VERBOSE, "HQA Profile\n");
quant = bytestream2_get_byte(&ctx->gbc);
bytestream2_skip(&ctx->gbc, 3);
quant = bytestream2_get_byte(gbc);
bytestream2_skip(gbc, 3);
if (quant >= NUM_HQ_QUANTS) {
av_log(ctx->avctx, AV_LOG_ERROR,
"Invalid quantization matrix %d.\n", quant);
@@ -280,7 +281,7 @@ static int hqa_decode_frame(HQContext *ctx, AVFrame *pic, size_t data_size)
/* Offsets are stored from HQA1 position, so adjust them accordingly. */
for (i = 0; i < num_slices + 1; i++)
slice_off[i] = bytestream2_get_be32(&ctx->gbc) - 4;
slice_off[i] = bytestream2_get_be32(gbc) - 4;
for (slice = 0; slice < num_slices; slice++) {
if (slice_off[slice] < (num_slices + 1) * 3 ||
@@ -305,32 +306,33 @@ static int hq_hqa_decode_frame(AVCodecContext *avctx, AVFrame *pic,
int *got_frame, AVPacket *avpkt)
{
HQContext *ctx = avctx->priv_data;
GetByteContext gbc0, *const gbc = &gbc0;
uint32_t info_tag;
unsigned int data_size;
int ret;
unsigned tag;
bytestream2_init(&ctx->gbc, avpkt->data, avpkt->size);
if (bytestream2_get_bytes_left(&ctx->gbc) < 4 + 4) {
bytestream2_init(gbc, avpkt->data, avpkt->size);
if (bytestream2_get_bytes_left(gbc) < 4 + 4) {
av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n", avpkt->size);
return AVERROR_INVALIDDATA;
}
info_tag = bytestream2_peek_le32(&ctx->gbc);
info_tag = bytestream2_peek_le32(gbc);
if (info_tag == MKTAG('I', 'N', 'F', 'O')) {
int info_size;
bytestream2_skip(&ctx->gbc, 4);
info_size = bytestream2_get_le32(&ctx->gbc);
if (info_size < 0 || bytestream2_get_bytes_left(&ctx->gbc) < info_size) {
bytestream2_skip(gbc, 4);
info_size = bytestream2_get_le32(gbc);
if (info_size < 0 || bytestream2_get_bytes_left(gbc) < info_size) {
av_log(avctx, AV_LOG_ERROR, "Invalid INFO size (%d).\n", info_size);
return AVERROR_INVALIDDATA;
}
ff_canopus_parse_info_tag(avctx, ctx->gbc.buffer, info_size);
ff_canopus_parse_info_tag(avctx, gbc->buffer, info_size);
bytestream2_skip(&ctx->gbc, info_size);
bytestream2_skip(gbc, info_size);
}
data_size = bytestream2_get_bytes_left(&ctx->gbc);
data_size = bytestream2_get_bytes_left(gbc);
if (data_size < 4) {
av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n", data_size);
return AVERROR_INVALIDDATA;
@@ -339,11 +341,11 @@ static int hq_hqa_decode_frame(AVCodecContext *avctx, AVFrame *pic,
/* HQ defines dimensions and number of slices, and thus slice traversal
* order. HQA has no size constraint and a fixed number of slices, so it
* needs a separate scheme for it. */
tag = bytestream2_get_le32(&ctx->gbc);
tag = bytestream2_get_le32(gbc);
if ((tag & 0x00FFFFFF) == (MKTAG('U', 'V', 'C', ' ') & 0x00FFFFFF)) {
ret = hq_decode_frame(ctx, pic, tag >> 24, data_size);
ret = hq_decode_frame(ctx, pic, gbc, tag >> 24, data_size);
} else if (tag == MKTAG('H', 'Q', 'A', '1')) {
ret = hqa_decode_frame(ctx, pic, data_size);
ret = hqa_decode_frame(ctx, pic, gbc, data_size);
} else {
av_log(avctx, AV_LOG_ERROR, "Not a HQ/HQA frame.\n");
return AVERROR_INVALIDDATA;

2
libavcodec/hq_hqa.h
View File

@@ -26,7 +26,6 @@
#include "libavutil/mem_internal.h"
#include "avcodec.h"
#include "bytestream.h"
#include "hq_hqadsp.h"
#include "vlc.h"
@@ -37,7 +36,6 @@
typedef struct HQContext {
AVCodecContext *avctx;
HQDSPContext hqhqadsp;
GetByteContext gbc;
VLC hq_ac_vlc;
VLC hqa_cbp_vlc;