* Copyright (c) 2003 Michael Niedermayer
* Copyright (c) 2006 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file jpeglsenc.c
+ * @file
* JPEG-LS encoder.
*/
#include "avcodec.h"
-#include "bitstream.h"
+#include "get_bits.h"
#include "golomb.h"
-#include "dsputil.h"
+#include "internal.h"
+#include "mathops.h"
#include "mjpeg.h"
#include "jpegls.h"
-
/**
* Encode error from regular symbol
*/
-static inline void ls_encode_regular(JLSState *state, PutBitContext *pb, int Q, int err){
+static inline void ls_encode_regular(JLSState *state, PutBitContext *pb, int Q,
+ int err)
+{
int k;
int val;
int map;
- for(k = 0; (state->N[Q] << k) < state->A[Q]; k++);
+ for (k = 0; (state->N[Q] << k) < state->A[Q]; k++)
+ ;
map = !state->near && !k && (2 * state->B[Q] <= -state->N[Q]);
- if(err < 0)
+ if (err < 0)
err += state->range;
- if(err >= ((state->range + 1) >> 1)) {
+ if (err >= (state->range + 1 >> 1)) {
err -= state->range;
- val = 2 * FFABS(err) - 1 - map;
+ val = 2 * FFABS(err) - 1 - map;
} else
val = 2 * err + map;
/**
* Encode error from run termination
*/
-static inline void ls_encode_runterm(JLSState *state, PutBitContext *pb, int RItype, int err, int limit_add){
+static inline void ls_encode_runterm(JLSState *state, PutBitContext *pb,
+ int RItype, int err, int limit_add)
+{
int k;
int val, map;
int Q = 365 + RItype;
int temp;
temp = state->A[Q];
- if(RItype)
+ if (RItype)
temp += state->N[Q] >> 1;
- for(k = 0; (state->N[Q] << k) < temp; k++);
+ for (k = 0; (state->N[Q] << k) < temp; k++)
+ ;
map = 0;
- if(!k && err && (2 * state->B[Q] < state->N[Q]))
+ if (!k && err && (2 * state->B[Q] < state->N[Q]))
map = 1;
- if(err < 0)
- val = - (2 * err) - 1 - RItype + map;
+ if (err < 0)
+ val = -(2 * err) - 1 - RItype + map;
else
val = 2 * err - RItype - map;
set_ur_golomb_jpegls(pb, val, k, state->limit - limit_add - 1, state->qbpp);
- if(err < 0)
+ if (err < 0)
state->B[Q]++;
state->A[Q] += (val + 1 - RItype) >> 1;
/**
* Encode run value as specified by JPEG-LS standard
*/
-static inline void ls_encode_run(JLSState *state, PutBitContext *pb, int run, int comp, int trail){
- while(run >= (1 << ff_log2_run[state->run_index[comp]])){
+static inline void ls_encode_run(JLSState *state, PutBitContext *pb, int run,
+ int comp, int trail)
+{
+ while (run >= (1 << ff_log2_run[state->run_index[comp]])) {
put_bits(pb, 1, 1);
run -= 1 << ff_log2_run[state->run_index[comp]];
- if(state->run_index[comp] < 31)
+ if (state->run_index[comp] < 31)
state->run_index[comp]++;
}
/* if hit EOL, encode another full run, else encode aborted run */
- if(!trail && run) {
+ if (!trail && run) {
put_bits(pb, 1, 1);
- }else if(trail){
+ } else if (trail) {
put_bits(pb, 1, 0);
- if(ff_log2_run[state->run_index[comp]])
+ if (ff_log2_run[state->run_index[comp]])
put_bits(pb, ff_log2_run[state->run_index[comp]], run);
}
}
/**
* Encode one line of image
*/
-static inline void ls_encode_line(JLSState *state, PutBitContext *pb, void *last, void *cur, int last2, int w, int stride, int comp, int bits){
+static inline void ls_encode_line(JLSState *state, PutBitContext *pb,
+ void *last, void *cur, int last2, int w,
+ int stride, int comp, int bits)
+{
int x = 0;
int Ra, Rb, Rc, Rd;
int D0, D1, D2;
- while(x < w) {
+ while (x < w) {
int err, pred, sign;
/* compute gradients */
D2 = Rc - Ra;
/* run mode */
- if((FFABS(D0) <= state->near) && (FFABS(D1) <= state->near) && (FFABS(D2) <= state->near)) {
+ if ((FFABS(D0) <= state->near) &&
+ (FFABS(D1) <= state->near) &&
+ (FFABS(D2) <= state->near)) {
int RUNval, RItype, run;
- run = 0;
+ run = 0;
RUNval = Ra;
- while(x < w && (FFABS(R(cur, x) - RUNval) <= state->near)){
+ while (x < w && (FFABS(R(cur, x) - RUNval) <= state->near)) {
run++;
W(cur, x, Ra);
x += stride;
}
ls_encode_run(state, pb, run, comp, x < w);
- if(x >= w)
+ if (x >= w)
return;
- Rb = R(last, x);
- RItype = (FFABS(Ra - Rb) <= state->near);
- pred = RItype ? Ra : Rb;
- err = R(cur, x) - pred;
+ Rb = R(last, x);
+ RItype = FFABS(Ra - Rb) <= state->near;
+ pred = RItype ? Ra : Rb;
+ err = R(cur, x) - pred;
- if(!RItype && Ra > Rb)
+ if (!RItype && Ra > Rb)
err = -err;
- if(state->near){
- if(err > 0)
- err = (state->near + err) / state->twonear;
+ if (state->near) {
+ if (err > 0)
+ err = (state->near + err) / state->twonear;
else
err = -(state->near - err) / state->twonear;
- if(RItype || (Rb >= Ra))
+ if (RItype || (Rb >= Ra))
Ra = av_clip(pred + err * state->twonear, 0, state->maxval);
else
Ra = av_clip(pred - err * state->twonear, 0, state->maxval);
W(cur, x, Ra);
}
- if(err < 0)
+ if (err < 0)
err += state->range;
- if(err >= ((state->range + 1) >> 1))
+ if (err >= state->range + 1 >> 1)
err -= state->range;
- ls_encode_runterm(state, pb, RItype, err, ff_log2_run[state->run_index[comp]]);
+ ls_encode_runterm(state, pb, RItype, err,
+ ff_log2_run[state->run_index[comp]]);
- if(state->run_index[comp] > 0)
+ if (state->run_index[comp] > 0)
state->run_index[comp]--;
} else { /* regular mode */
int context;
- context = ff_jpegls_quantize(state, D0) * 81 + ff_jpegls_quantize(state, D1) * 9 + ff_jpegls_quantize(state, D2);
- pred = mid_pred(Ra, Ra + Rb - Rc, Rb);
+ context = ff_jpegls_quantize(state, D0) * 81 +
+ ff_jpegls_quantize(state, D1) * 9 +
+ ff_jpegls_quantize(state, D2);
+ pred = mid_pred(Ra, Ra + Rb - Rc, Rb);
- if(context < 0){
+ if (context < 0) {
context = -context;
- sign = 1;
- pred = av_clip(pred - state->C[context], 0, state->maxval);
- err = pred - R(cur, x);
- }else{
+ sign = 1;
+ pred = av_clip(pred - state->C[context], 0, state->maxval);
+ err = pred - R(cur, x);
+ } else {
sign = 0;
pred = av_clip(pred + state->C[context], 0, state->maxval);
- err = R(cur, x) - pred;
+ err = R(cur, x) - pred;
}
- if(state->near){
- if(err > 0)
- err = (state->near + err) / state->twonear;
+ if (state->near) {
+ if (err > 0)
+ err = (state->near + err) / state->twonear;
else
err = -(state->near - err) / state->twonear;
- if(!sign)
+ if (!sign)
Ra = av_clip(pred + err * state->twonear, 0, state->maxval);
else
Ra = av_clip(pred - err * state->twonear, 0, state->maxval);
}
}
-static void ls_store_lse(JLSState *state, PutBitContext *pb){
+static void ls_store_lse(JLSState *state, PutBitContext *pb)
+{
/* Test if we have default params and don't need to store LSE */
- JLSState state2;
- memset(&state2, 0, sizeof(JLSState));
- state2.bpp = state->bpp;
+ JLSState state2 = { 0 };
+ state2.bpp = state->bpp;
state2.near = state->near;
ff_jpegls_reset_coding_parameters(&state2, 1);
- if(state->T1 == state2.T1 && state->T2 == state2.T2 && state->T3 == state2.T3 && state->reset == state2.reset)
+ if (state->T1 == state2.T1 &&
+ state->T2 == state2.T2 &&
+ state->T3 == state2.T3 &&
+ 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, 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->reset);
}
-static int encode_picture_ls(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
- JpeglsContext * const s = avctx->priv_data;
- AVFrame *pict = data;
- AVFrame * const p= (AVFrame*)&s->picture;
- const int near = avctx->prediction_method;
+static int encode_picture_ls(AVCodecContext *avctx, AVPacket *pkt,
+ const AVFrame *pict, int *got_packet)
+{
+ const AVFrame *const p = pict;
+ const int near = avctx->prediction_method;
PutBitContext pb, pb2;
GetBitContext gb;
uint8_t *buf2, *zero, *cur, *last;
JLSState *state;
- int i, size;
+ int i, size, ret;
int comps;
- buf2 = av_malloc(buf_size);
-
- init_put_bits(&pb, buf, buf_size);
- init_put_bits(&pb2, buf2, buf_size);
-
- *p = *pict;
- p->pict_type= FF_I_TYPE;
- p->key_frame= 1;
-
- if(avctx->pix_fmt == PIX_FMT_GRAY8 || avctx->pix_fmt == PIX_FMT_GRAY16)
+ if (avctx->pix_fmt == AV_PIX_FMT_GRAY8 ||
+ avctx->pix_fmt == AV_PIX_FMT_GRAY16)
comps = 1;
else
comps = 3;
+ if ((ret = ff_alloc_packet(pkt, avctx->width * avctx->height * comps * 4 +
+ FF_MIN_BUFFER_SIZE)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
+ return ret;
+ }
+
+ buf2 = av_malloc(pkt->size);
+
+ init_put_bits(&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 == PIX_FMT_GRAY16) ? 16 : 8); // bpp
+ 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
- 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
+ put_bits(&pb, 8, 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
}
put_marker(&pb, SOS);
put_bits(&pb, 16, 6 + comps * 2);
- put_bits(&pb, 8, comps);
- for(i = 1; i <= comps; i++) {
- put_bits(&pb, 8, i); // component ID
- put_bits(&pb, 8, 0); // mapping index: none
+ put_bits(&pb, 8, comps);
+ for (i = 1; i <= comps; i++) {
+ put_bits(&pb, 8, i); // component ID
+ put_bits(&pb, 8, 0); // mapping index: none
}
- put_bits(&pb, 8, near);
- put_bits(&pb, 8, (comps > 1) ? 1 : 0); // interleaving: 0 - plane, 1 - line
- put_bits(&pb, 8, 0); // point transform: none
+ put_bits(&pb, 8, near);
+ put_bits(&pb, 8, (comps > 1) ? 1 : 0); // interleaving: 0 - plane, 1 - line
+ put_bits(&pb, 8, 0); // point transform: none
state = av_mallocz(sizeof(JLSState));
/* initialize JPEG-LS state from JPEG parameters */
state->near = near;
- state->bpp = (avctx->pix_fmt == PIX_FMT_GRAY16) ? 16 : 8;
+ state->bpp = (avctx->pix_fmt == AV_PIX_FMT_GRAY16) ? 16 : 8;
ff_jpegls_reset_coding_parameters(state, 0);
ff_jpegls_init_state(state);
zero = av_mallocz(p->linesize[0]);
last = zero;
- cur = p->data[0];
- if(avctx->pix_fmt == PIX_FMT_GRAY8){
+ cur = p->data[0];
+ if (avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
int t = 0;
- for(i = 0; i < avctx->height; i++) {
- ls_encode_line(state, &pb2, last, cur, t, avctx->width, 1, 0, 8);
- t = last[0];
+ for (i = 0; i < avctx->height; i++) {
+ ls_encode_line(state, &pb2, last, cur, t, avctx->width, 1, 0, 8);
+ t = last[0];
last = cur;
cur += p->linesize[0];
}
- }else if(avctx->pix_fmt == PIX_FMT_GRAY16){
+ } else if (avctx->pix_fmt == AV_PIX_FMT_GRAY16) {
int t = 0;
- for(i = 0; i < avctx->height; i++) {
+ for (i = 0; i < avctx->height; i++) {
ls_encode_line(state, &pb2, last, cur, t, avctx->width, 1, 0, 16);
- t = *((uint16_t*)last);
+ t = *((uint16_t *)last);
last = cur;
cur += p->linesize[0];
}
- }else if(avctx->pix_fmt == PIX_FMT_RGB24){
+ } else if (avctx->pix_fmt == AV_PIX_FMT_RGB24) {
int j, width;
- int Rc[3] = {0, 0, 0};
+ int Rc[3] = { 0, 0, 0 };
width = avctx->width * 3;
- for(i = 0; i < avctx->height; i++) {
- for(j = 0; j < 3; j++) {
- ls_encode_line(state, &pb2, last + j, cur + j, Rc[j], width, 3, j, 8);
+ for (i = 0; i < avctx->height; i++) {
+ for (j = 0; j < 3; j++) {
+ ls_encode_line(state, &pb2, last + j, cur + j, Rc[j],
+ width, 3, j, 8);
Rc[j] = last[j];
}
last = cur;
- cur += s->picture.linesize[0];
+ cur += p->linesize[0];
}
- }else if(avctx->pix_fmt == PIX_FMT_BGR24){
+ } else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
int j, width;
- int Rc[3] = {0, 0, 0};
+ int Rc[3] = { 0, 0, 0 };
width = avctx->width * 3;
- for(i = 0; i < avctx->height; i++) {
- for(j = 2; j >= 0; j--) {
- ls_encode_line(state, &pb2, last + j, cur + j, Rc[j], width, 3, j, 8);
+ for (i = 0; i < avctx->height; i++) {
+ for (j = 2; j >= 0; j--) {
+ ls_encode_line(state, &pb2, last + j, cur + j, Rc[j],
+ width, 3, j, 8);
Rc[j] = last[j];
}
last = cur;
- cur += s->picture.linesize[0];
+ cur += p->linesize[0];
}
}
av_free(zero);
av_free(state);
- // the specification says that after doing 0xff escaping unused bits in the
- // last byte must be set to 0, so just append 7 "optional" zero-bits to
- // avoid special-casing.
+ /* the specification says that after doing 0xff escaping unused bits in
+ * the last byte must be set to 0, so just append 7 "optional" zero-bits
+ * to avoid special-casing. */
put_bits(&pb2, 7, 0);
size = put_bits_count(&pb2);
flush_put_bits(&pb2);
/* do escape coding */
init_get_bits(&gb, buf2, size);
size -= 7;
- while(get_bits_count(&gb) < size){
+ while (get_bits_count(&gb) < size) {
int v;
v = get_bits(&gb, 8);
put_bits(&pb, 8, v);
- if(v == 0xFF){
+ if (v == 0xFF) {
v = get_bits(&gb, 7);
put_bits(&pb, 8, v);
}
}
- align_put_bits(&pb);
+ avpriv_align_put_bits(&pb);
av_free(buf2);
/* End of image */
emms_c();
- return put_bits_count(&pb) >> 3;
+ pkt->size = put_bits_count(&pb) >> 3;
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ *got_packet = 1;
+ return 0;
}
-static av_cold int encode_init_ls(AVCodecContext *ctx) {
- JpeglsContext *c = (JpeglsContext*)ctx->priv_data;
-
- c->avctx = ctx;
- ctx->coded_frame = &c->picture;
+static av_cold int encode_close(AVCodecContext *avctx)
+{
+ av_frame_free(&avctx->coded_frame);
+ return 0;
+}
- if(ctx->pix_fmt != PIX_FMT_GRAY8 && ctx->pix_fmt != PIX_FMT_GRAY16 && ctx->pix_fmt != PIX_FMT_RGB24 && ctx->pix_fmt != PIX_FMT_BGR24){
- av_log(ctx, AV_LOG_ERROR, "Only grayscale and RGB24/BGR24 images are supported\n");
+static av_cold int encode_init_ls(AVCodecContext *ctx)
+{
+ ctx->coded_frame = av_frame_alloc();
+ if (!ctx->coded_frame)
+ return AVERROR(ENOMEM);
+
+ ctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+ ctx->coded_frame->key_frame = 1;
+
+ if (ctx->pix_fmt != AV_PIX_FMT_GRAY8 &&
+ ctx->pix_fmt != AV_PIX_FMT_GRAY16 &&
+ ctx->pix_fmt != AV_PIX_FMT_RGB24 &&
+ ctx->pix_fmt != AV_PIX_FMT_BGR24) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Only grayscale and RGB24/BGR24 images are supported\n");
return -1;
}
return 0;
}
-AVCodec jpegls_encoder = { //FIXME avoid MPV_* lossless JPEG should not need them
- "jpegls",
- CODEC_TYPE_VIDEO,
- CODEC_ID_JPEGLS,
- sizeof(JpeglsContext),
- encode_init_ls,
- encode_picture_ls,
- NULL,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_RGB24, PIX_FMT_GRAY8, PIX_FMT_GRAY16, PIX_FMT_NONE},
- .long_name= "JPEG-LS",
+AVCodec ff_jpegls_encoder = {
+ .name = "jpegls",
+ .long_name = NULL_IF_CONFIG_SMALL("JPEG-LS"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_JPEGLS,
+ .init = encode_init_ls,
+ .close = encode_close,
+ .encode2 = encode_picture_ls,
+ .pix_fmts = (const enum AVPixelFormat[]) {
+ AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB24,
+ AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
+ AV_PIX_FMT_NONE
+ },
};
projects / ffmpeg / blobdiff