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avcodec/jpeglsenc: Don't use put bits API for byte-aligned writes 

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-09-03 12:42:09 +02:00
parent 3065532a0e
commit 130d89d786
1 changed files with 47 additions and 35 deletions
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82
libavcodec/jpeglsenc.c
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@ -26,6 +26,7 @@
*/
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "put_bits.h"
#include "golomb.h"
@ -41,6 +42,18 @@ typedef struct JPEGLSContext {
int pred;
} JPEGLSContext;
static inline void put_marker_byteu(PutByteContext *pb, enum JpegMarker code)
{
bytestream2_put_byteu(pb, 0xff);
bytestream2_put_byteu(pb, code);
}
static inline void put_marker_byte(PutByteContext *pb, enum JpegMarker code)
{
bytestream2_put_byte(pb, 0xff);
bytestream2_put_byte(pb, code);
}
/**
* Encode error from regular symbol
*/
@ -230,7 +243,7 @@ static inline void ls_encode_line(JLSState *state, PutBitContext *pb,
}
}
static void ls_store_lse(JLSState *state, PutBitContext *pb)
static void ls_store_lse(JLSState *state, PutByteContext *pb)
{
/* Test if we have default params and don't need to store LSE */
JLSState state2 = { 0 };
@ -243,14 +256,14 @@ static void ls_store_lse(JLSState *state, PutBitContext *pb)
state->reset == state2.reset)
return;
/* store LSE type 1 */
put_marker(pb, LSE);
put_bits(pb, 16, 13);
put_bits(pb, 8, 1);
put_bits(pb, 16, state->maxval);
put_bits(pb, 16, state->T1);
put_bits(pb, 16, state->T2);
put_bits(pb, 16, state->T3);
put_bits(pb, 16, state->reset);
put_marker_byteu(pb, LSE);
bytestream2_put_be16u(pb, 13);
bytestream2_put_byteu(pb, 1);
bytestream2_put_be16u(pb, state->maxval);
bytestream2_put_be16u(pb, state->T1);
bytestream2_put_be16u(pb, state->T2);
bytestream2_put_be16u(pb, state->T3);
bytestream2_put_be16u(pb, state->reset);
}
static int encode_picture_ls(AVCodecContext *avctx, AVPacket *pkt,
@ -258,7 +271,8 @@ static int encode_picture_ls(AVCodecContext *avctx, AVPacket *pkt,
{
JPEGLSContext *ctx = avctx->priv_data;
const AVFrame *const p = pict;
PutBitContext pb, pb2;
PutByteContext pb;
PutBitContext pb2;
GetBitContext gb;
uint8_t *buf2 = NULL;
uint8_t *zero = NULL;
@ -289,33 +303,33 @@ FF_ENABLE_DEPRECATION_WARNINGS
if (!buf2)
goto memfail;
init_put_bits(&pb, pkt->data, pkt->size);
bytestream2_init_writer(&pb, pkt->data, pkt->size);
init_put_bits(&pb2, buf2, pkt->size);
/* write our own JPEG header, can't use mjpeg_picture_header */
put_marker(&pb, SOI);
put_marker(&pb, SOF48);
put_bits(&pb, 16, 8 + comps * 3); // header size depends on components
put_bits(&pb, 8, (avctx->pix_fmt == AV_PIX_FMT_GRAY16) ? 16 : 8); // bpp
put_bits(&pb, 16, avctx->height);
put_bits(&pb, 16, avctx->width);
put_bits(&pb, 8, comps); // components
put_marker_byteu(&pb, SOI);
put_marker_byteu(&pb, SOF48);
bytestream2_put_be16u(&pb, 8 + comps * 3); // header size depends on components
bytestream2_put_byteu(&pb, (avctx->pix_fmt == AV_PIX_FMT_GRAY16) ? 16 : 8); // bpp
bytestream2_put_be16u(&pb, avctx->height);
bytestream2_put_be16u(&pb, avctx->width);
bytestream2_put_byteu(&pb, comps); // components
for (i = 1; i <= comps; i++) {
put_bits(&pb, 8, i); // component ID
put_bits(&pb, 8, 0x11); // subsampling: none
put_bits(&pb, 8, 0); // Tiq, used by JPEG-LS ext
bytestream2_put_byteu(&pb, i); // component ID
bytestream2_put_byteu(&pb, 0x11); // subsampling: none
bytestream2_put_byteu(&pb, 0); // Tiq, used by JPEG-LS ext
}
put_marker(&pb, SOS);
put_bits(&pb, 16, 6 + comps * 2);
put_bits(&pb, 8, comps);
put_marker_byteu(&pb, SOS);
bytestream2_put_be16u(&pb, 6 + comps * 2);
bytestream2_put_byteu(&pb, comps);
for (i = 1; i <= comps; i++) {
put_bits(&pb, 8, i); // component ID
put_bits(&pb, 8, 0); // mapping index: none
bytestream2_put_byteu(&pb, i); // component ID
bytestream2_put_byteu(&pb, 0); // mapping index: none
}
put_bits(&pb, 8, ctx->pred);
put_bits(&pb, 8, (comps > 1) ? 1 : 0); // interleaving: 0 - plane, 1 - line
put_bits(&pb, 8, 0); // point transform: none
bytestream2_put_byteu(&pb, ctx->pred);
bytestream2_put_byteu(&pb, (comps > 1) ? 1 : 0); // interleaving: 0 - plane, 1 - line
bytestream2_put_byteu(&pb, 0); // point transform: none
state = av_mallocz(sizeof(JLSState));
if (!state)
@ -397,22 +411,20 @@ FF_ENABLE_DEPRECATION_WARNINGS
while (get_bits_count(&gb) < size) {
int v;
v = get_bits(&gb, 8);
put_bits(&pb, 8, v);
bytestream2_put_byte(&pb, v);
if (v == 0xFF) {
v = get_bits(&gb, 7);
put_bits(&pb, 8, v);
bytestream2_put_byte(&pb, v);
}
}
align_put_bits(&pb);
av_freep(&buf2);
/* End of image */
put_marker(&pb, EOI);
flush_put_bits(&pb);
put_marker_byte(&pb, EOI);
emms_c();
pkt->size = put_bits_count(&pb) >> 3;
pkt->size = bytestream2_tell_p(&pb);
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;