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Diffstat (limited to 'src/libffmpeg/libavcodec/mjpeg.c')
-rw-r--r--src/libffmpeg/libavcodec/mjpeg.c439
1 files changed, 409 insertions, 30 deletions
diff --git a/src/libffmpeg/libavcodec/mjpeg.c b/src/libffmpeg/libavcodec/mjpeg.c
index 22530c9e4..ec8046446 100644
--- a/src/libffmpeg/libavcodec/mjpeg.c
+++ b/src/libffmpeg/libavcodec/mjpeg.c
@@ -27,6 +27,8 @@
*/
//#define DEBUG
+#include <assert.h>
+
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
@@ -36,7 +38,7 @@
#undef TWOMATRIXES
typedef struct MJpegContext {
- uint8_t huff_size_dc_luminance[12];
+ uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
uint16_t huff_code_dc_luminance[12];
uint8_t huff_size_dc_chrominance[12];
uint16_t huff_code_dc_chrominance[12];
@@ -279,6 +281,17 @@ void mjpeg_close(MpegEncContext *s)
av_free(s->mjpeg_ctx);
}
+#define PREDICT(ret, topleft, top, left, predictor)\
+ switch(predictor){\
+ case 1: ret= left; break;\
+ case 2: ret= top; break;\
+ case 3: ret= topleft; break;\
+ case 4: ret= left + top - topleft; break;\
+ case 5: ret= left + ((top - topleft)>>1); break;\
+ case 6: ret= top + ((left - topleft)>>1); break;\
+ case 7: ret= (left + top)>>1; break;\
+ }
+
static inline void put_marker(PutBitContext *p, int code)
{
put_bits(p, 8, 0xff);
@@ -356,7 +369,7 @@ static void jpeg_put_comments(MpegEncContext *s)
int size;
uint8_t *ptr;
- if (s->aspect_ratio_info)
+ if (s->aspect_ratio_info /* && !lossless */)
{
/* JFIF header */
put_marker(p, APP0);
@@ -405,6 +418,8 @@ static void jpeg_put_comments(MpegEncContext *s)
void mjpeg_picture_header(MpegEncContext *s)
{
+ const int lossless= s->avctx->codec_id == CODEC_ID_LJPEG;
+
put_marker(&s->pb, SOI);
if (!s->mjpeg_data_only_frames)
@@ -413,10 +428,13 @@ void mjpeg_picture_header(MpegEncContext *s)
if (s->mjpeg_write_tables) jpeg_table_header(s);
- put_marker(&s->pb, SOF0);
+ put_marker(&s->pb, lossless ? SOF3 : SOF0);
put_bits(&s->pb, 16, 17);
- put_bits(&s->pb, 8, 8); /* 8 bits/component */
+ if(lossless && s->avctx->pix_fmt == PIX_FMT_RGBA32)
+ put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */
+ else
+ put_bits(&s->pb, 8, 8); /* 8 bits/component */
put_bits(&s->pb, 16, s->height);
put_bits(&s->pb, 16, s->width);
put_bits(&s->pb, 8, 3); /* 3 components */
@@ -432,7 +450,7 @@ void mjpeg_picture_header(MpegEncContext *s)
put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */
put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */
#ifdef TWOMATRIXES
- put_bits(&s->pb, 8, 1); /* select matrix */
+ put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
#else
put_bits(&s->pb, 8, 0); /* select matrix */
#endif
@@ -442,7 +460,7 @@ void mjpeg_picture_header(MpegEncContext *s)
put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */
put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */
#ifdef TWOMATRIXES
- put_bits(&s->pb, 8, 1); /* select matrix */
+ put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
#else
put_bits(&s->pb, 8, 0); /* select matrix */
#endif
@@ -461,15 +479,15 @@ void mjpeg_picture_header(MpegEncContext *s)
/* Cb component */
put_bits(&s->pb, 8, 2); /* index */
put_bits(&s->pb, 4, 1); /* DC huffman table index */
- put_bits(&s->pb, 4, 1); /* AC huffman table index */
+ put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
/* Cr component */
put_bits(&s->pb, 8, 3); /* index */
put_bits(&s->pb, 4, 1); /* DC huffman table index */
- put_bits(&s->pb, 4, 1); /* AC huffman table index */
+ put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
- put_bits(&s->pb, 8, 0); /* Ss (not used) */
- put_bits(&s->pb, 8, 63); /* Se (not used) */
+ put_bits(&s->pb, 8, lossless ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */
+ put_bits(&s->pb, 8, lossless ? 0 : 63); /* Se (not used) */
put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */
}
@@ -632,6 +650,146 @@ void mjpeg_encode_mb(MpegEncContext *s,
}
}
+static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
+ MpegEncContext * const s = avctx->priv_data;
+ MJpegContext * const m = s->mjpeg_ctx;
+ AVFrame *pict = data;
+ const int width= s->width;
+ const int height= s->height;
+ AVFrame * const p= (AVFrame*)&s->current_picture;
+ const int predictor= avctx->prediction_method+1;
+
+ init_put_bits(&s->pb, buf, buf_size, NULL, NULL);
+
+ *p = *pict;
+ p->pict_type= FF_I_TYPE;
+ p->key_frame= 1;
+
+ mjpeg_picture_header(s);
+
+ s->header_bits= get_bit_count(&s->pb);
+
+ if(avctx->pix_fmt == PIX_FMT_RGBA32){
+ int x, y, i;
+ const int linesize= p->linesize[0];
+ uint16_t buffer[2048][4];
+ int left[3], top[3], topleft[3];
+
+ for(i=0; i<3; i++){
+ buffer[0][i]= 1 << (9 - 1);
+ }
+
+ for(y = 0; y < height; y++) {
+ const int modified_predictor= y ? 1 : predictor;
+ uint8_t *ptr = p->data[0] + (linesize * y);
+
+ for(i=0; i<3; i++){
+ top[i]= left[i]= topleft[i]= buffer[0][i];
+ }
+ for(x = 0; x < width; x++) {
+ buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
+ buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
+ buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
+
+ for(i=0;i<3;i++) {
+ int pred, diff;
+
+ PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
+
+ topleft[i]= top[i];
+ top[i]= buffer[x+1][i];
+
+ left[i]= buffer[x][i];
+
+ diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
+
+ if(i==0)
+ mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+ else
+ mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+ }
+ }
+ }
+ }else{
+ int mb_x, mb_y, i;
+ const int mb_width = (width + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
+ const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
+
+ for(mb_y = 0; mb_y < mb_height; mb_y++) {
+ for(mb_x = 0; mb_x < mb_width; mb_x++) {
+ if(mb_x==0 || mb_y==0){
+ for(i=0;i<3;i++) {
+ uint8_t *ptr;
+ int x, y, h, v, linesize;
+ h = s->mjpeg_hsample[i];
+ v = s->mjpeg_vsample[i];
+ linesize= p->linesize[i];
+
+ for(y=0; y<v; y++){
+ for(x=0; x<h; x++){
+ int pred;
+
+ ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
+ if(y==0 && mb_y==0){
+ if(x==0 && mb_x==0){
+ pred= 128;
+ }else{
+ pred= ptr[-1];
+ }
+ }else{
+ if(x==0 && mb_x==0){
+ pred= ptr[-linesize];
+ }else{
+ PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
+ }
+ }
+
+ if(i==0)
+ mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+ else
+ mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+ }
+ }
+ }
+ }else{
+ for(i=0;i<3;i++) {
+ uint8_t *ptr;
+ int x, y, h, v, linesize;
+ h = s->mjpeg_hsample[i];
+ v = s->mjpeg_vsample[i];
+ linesize= p->linesize[i];
+
+ for(y=0; y<v; y++){
+ for(x=0; x<h; x++){
+ int pred;
+
+ ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
+//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
+ PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
+
+ if(i==0)
+ mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+ else
+ mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+
+ emms_c();
+
+ mjpeg_picture_trailer(s);
+ s->picture_number++;
+
+ flush_put_bits(&s->pb);
+ return pbBufPtr(&s->pb) - s->pb.buf;
+// return (get_bit_count(&f->pb)+7)/8;
+}
+
+
/******************************************/
/* decoding */
@@ -653,6 +811,11 @@ typedef struct MJpegDecodeContext {
int first_picture; /* true if decoding first picture */
int interlaced; /* true if interlaced */
int bottom_field; /* true if bottom field */
+ int lossless;
+ int rgb;
+ int rct; /* standard rct */
+ int pegasus_rct; /* pegasus reversible colorspace transform */
+ int bits; /* bits per component */
int width, height;
int nb_components;
@@ -810,15 +973,21 @@ static int mjpeg_decode_dht(MJpegDecodeContext *s)
return 0;
}
-static int mjpeg_decode_sof0(MJpegDecodeContext *s)
+static int mjpeg_decode_sof(MJpegDecodeContext *s)
{
int len, nb_components, i, width, height;
/* XXX: verify len field validity */
len = get_bits(&s->gb, 16);
- /* only 8 bits/component accepted */
- if (get_bits(&s->gb, 8) != 8)
+ s->bits= get_bits(&s->gb, 8);
+
+ if(s->pegasus_rct) s->bits=9;
+ if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
+
+ if (s->bits != 8 && !s->lossless){
+ printf("only 8 bits/component accepted\n");
return -1;
+ }
height = get_bits(&s->gb, 16);
width = get_bits(&s->gb, 16);
dprintf("sof0: picture: %dx%d\n", width, height);
@@ -846,6 +1015,8 @@ static int mjpeg_decode_sof0(MJpegDecodeContext *s)
dprintf("component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
s->v_count[i], s->component_id[i], s->quant_index[i]);
}
+
+ if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
/* if different size, realloc/alloc picture */
/* XXX: also check h_count and v_count */
@@ -863,7 +1034,17 @@ static int mjpeg_decode_sof0(MJpegDecodeContext *s)
s->bottom_field = 0;
}
- for(i=0;i<nb_components;i++) {
+ if(s->rgb){
+ int w, h;
+ w = s->width;
+ h = s->height;
+ if (s->interlaced)
+ w *= 2;
+ s->linesize[0] = 4*w;
+ s->current_picture[0] = av_mallocz(4*w * h);
+ s->current_picture[1] = s->current_picture[2] = NULL;
+ }else{
+ for(i=0;i<nb_components;i++) {
int w, h;
w = (s->width + 8 * s->h_max - 1) / (8 * s->h_max);
h = (s->height + 8 * s->v_max - 1) / (8 * s->v_max);
@@ -878,6 +1059,7 @@ static int mjpeg_decode_sof0(MJpegDecodeContext *s)
dprintf("error: no picture buffers allocated\n");
return -1;
}
+ }
}
s->first_picture = 0;
}
@@ -959,7 +1141,7 @@ static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
static int mjpeg_decode_sos(MJpegDecodeContext *s)
{
- int len, nb_components, i, j, n, h, v, ret;
+ int len, nb_components, i, j, n, h, v, ret, point_transform, predictor;
int mb_width, mb_height, mb_x, mb_y, vmax, hmax, index, id;
int comp_index[4];
int dc_index[4];
@@ -967,7 +1149,8 @@ static int mjpeg_decode_sos(MJpegDecodeContext *s)
int nb_blocks[4];
int h_count[4];
int v_count[4];
-
+ const int block_size= s->lossless ? 1 : 8;
+
/* XXX: verify len field validity */
len = get_bits(&s->gb, 16);
nb_components = get_bits(&s->gb, 8);
@@ -998,6 +1181,7 @@ static int mjpeg_decode_sos(MJpegDecodeContext *s)
}
comp_index[i] = index;
+
nb_blocks[i] = s->h_count[index] * s->v_count[index];
h_count[i] = s->h_count[index];
v_count[i] = s->v_count[index];
@@ -1025,29 +1209,178 @@ static int mjpeg_decode_sos(MJpegDecodeContext *s)
break;
}
}
- skip_bits(&s->gb, 8); /* Ss */
+
+ predictor= get_bits(&s->gb, 8); /* lossless predictor or start of spectral (Ss) */
skip_bits(&s->gb, 8); /* Se */
- skip_bits(&s->gb, 8); /* Ah and Al (each are 4 bits) */
+ skip_bits(&s->gb, 4); /* Ah */
+ point_transform= get_bits(&s->gb, 4); /* Al */
for(i=0;i<nb_components;i++)
s->last_dc[i] = 1024;
if (nb_components > 1) {
/* interleaved stream */
- mb_width = (s->width + s->h_max * 8 - 1) / (s->h_max * 8);
- mb_height = (s->height + s->v_max * 8 - 1) / (s->v_max * 8);
+ mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
+ mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
} else {
h = s->h_max / s->h_count[comp_index[0]];
v = s->v_max / s->v_count[comp_index[0]];
- mb_width = (s->width + h * 8 - 1) / (h * 8);
- mb_height = (s->height + v * 8 - 1) / (v * 8);
+ mb_width = (s->width + h * block_size - 1) / (h * block_size);
+ mb_height = (s->height + v * block_size - 1) / (v * block_size);
nb_blocks[0] = 1;
h_count[0] = 1;
v_count[0] = 1;
}
+
+ if(s->avctx->debug & FF_DEBUG_PICT_INFO)
+ printf("%s %s p:%d >>:%d\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "", predictor, point_transform);
- for(mb_y = 0; mb_y < mb_height; mb_y++) {
+ if(s->lossless){
+ if(s->rgb){
+ uint16_t buffer[2048][4];
+ int left[3], top[3], topleft[3];
+ const int linesize= s->linesize[0];
+ const int mask= (1<<s->bits)-1;
+
+ for(i=0; i<3; i++){
+ buffer[0][i]= 1 << (s->bits + point_transform - 1);
+ }
+ for(mb_y = 0; mb_y < mb_height; mb_y++) {
+ const int modified_predictor= mb_y ? 1 : predictor;
+ uint8_t *ptr = s->current_picture[0] + (linesize * mb_y);
+
+ if (s->interlaced && s->bottom_field)
+ ptr += linesize >> 1;
+
+ for(i=0; i<3; i++){
+ top[i]= left[i]= topleft[i]= buffer[0][i];
+ }
+ for(mb_x = 0; mb_x < mb_width; mb_x++) {
+ if (s->restart_interval && !s->restart_count)
+ s->restart_count = s->restart_interval;
+
+ for(i=0;i<3;i++) {
+ int pred;
+
+ topleft[i]= top[i];
+ top[i]= buffer[mb_x][i];
+
+ PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
+
+ left[i]=
+ buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, dc_index[i]) << point_transform));
+ }
+
+ if (s->restart_interval && !--s->restart_count) {
+ align_get_bits(&s->gb);
+ skip_bits(&s->gb, 16); /* skip RSTn */
+ }
+ }
+
+ if(s->rct){
+ for(mb_x = 0; mb_x < mb_width; mb_x++) {
+ ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
+ ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
+ ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
+ }
+ }else if(s->pegasus_rct){
+ for(mb_x = 0; mb_x < mb_width; mb_x++) {
+ ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
+ ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
+ ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
+ }
+ }else{
+ for(mb_x = 0; mb_x < mb_width; mb_x++) {
+ ptr[4*mb_x+0] = buffer[mb_x][0];
+ ptr[4*mb_x+1] = buffer[mb_x][1];
+ ptr[4*mb_x+2] = buffer[mb_x][2];
+ }
+ }
+ }
+ }else{
+ for(mb_y = 0; mb_y < mb_height; mb_y++) {
+ for(mb_x = 0; mb_x < mb_width; mb_x++) {
+ if (s->restart_interval && !s->restart_count)
+ s->restart_count = s->restart_interval;
+
+ if(mb_x==0 || mb_y==0 || s->interlaced){
+ for(i=0;i<nb_components;i++) {
+ uint8_t *ptr;
+ int x, y, c, linesize;
+ n = nb_blocks[i];
+ c = comp_index[i];
+ h = h_count[i];
+ v = v_count[i];
+ x = 0;
+ y = 0;
+ linesize= s->linesize[c];
+
+ for(j=0; j<n; j++) {
+ int pred;
+
+ ptr = s->current_picture[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
+ if(y==0 && mb_y==0){
+ if(x==0 && mb_x==0){
+ pred= 128 << point_transform;
+ }else{
+ pred= ptr[-1];
+ }
+ }else{
+ if(x==0 && mb_x==0){
+ pred= ptr[-linesize];
+ }else{
+ PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
+ }
+ }
+
+ if (s->interlaced && s->bottom_field)
+ ptr += linesize >> 1;
+ *ptr= pred + (mjpeg_decode_dc(s, dc_index[i]) << point_transform);
+
+ if (++x == h) {
+ x = 0;
+ y++;
+ }
+ }
+ }
+ }else{
+ for(i=0;i<nb_components;i++) {
+ uint8_t *ptr;
+ int x, y, c, linesize;
+ n = nb_blocks[i];
+ c = comp_index[i];
+ h = h_count[i];
+ v = v_count[i];
+ x = 0;
+ y = 0;
+ linesize= s->linesize[c];
+
+ for(j=0; j<n; j++) {
+ int pred;
+
+ ptr = s->current_picture[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
+ PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
+ *ptr= pred + (mjpeg_decode_dc(s, dc_index[i]) << point_transform);
+ if (++x == h) {
+ x = 0;
+ y++;
+ }
+ }
+ }
+ }
+ if (s->restart_interval && !--s->restart_count) {
+ align_get_bits(&s->gb);
+ skip_bits(&s->gb, 16); /* skip RSTn */
+ }
+ }
+ }
+ }
+ }else{
+ for(mb_y = 0; mb_y < mb_height; mb_y++) {
for(mb_x = 0; mb_x < mb_width; mb_x++) {
+ if (s->restart_interval && !s->restart_count)
+ s->restart_count = s->restart_interval;
+
for(i=0;i<nb_components;i++) {
uint8_t *ptr;
int x, y, c;
@@ -1057,8 +1390,6 @@ static int mjpeg_decode_sos(MJpegDecodeContext *s)
v = v_count[i];
x = 0;
y = 0;
- if (s->restart_interval && !s->restart_count)
- s->restart_count = s->restart_interval;
for(j=0;j<n;j++) {
memset(s->block, 0, sizeof(s->block));
if (decode_block(s, s->block, i,
@@ -1091,6 +1422,7 @@ static int mjpeg_decode_sos(MJpegDecodeContext *s)
}
}
}
+ }
ret = 0;
the_end:
emms_c();
@@ -1123,6 +1455,10 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
id = be2me_32(id);
len -= 6;
+ if(s->avctx->debug & FF_DEBUG_STARTCODE){
+ printf("APPx %8X\n", id);
+ }
+
/* buggy AVID, it puts EOI only at every 10th frame */
/* also this fourcc is used by non-avid files too, it holds some
informations, but it's always present in AVID creates files */
@@ -1135,7 +1471,7 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
4bytes field_size
4bytes field_size_less_padding
*/
-// s->buggy_avid = 1;
+ s->buggy_avid = 1;
// if (s->first_picture)
// printf("mjpeg: workarounding buggy AVID\n");
s->interlace_polarity = get_bits(&s->gb, 8);
@@ -1204,6 +1540,28 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
len -= 7;
goto out;
}
+
+ if (id == ff_get_fourcc("LJIF")){
+ printf("Pegasus lossless jpeg header found\n");
+ skip_bits(&s->gb, 16); /* version ? */
+ skip_bits(&s->gb, 16); /* unknwon always 0? */
+ skip_bits(&s->gb, 16); /* unknwon always 0? */
+ skip_bits(&s->gb, 16); /* unknwon always 0? */
+ switch( get_bits(&s->gb, 8)){
+ case 1:
+ s->rgb= 1;
+ s->pegasus_rct=0;
+ break;
+ case 2:
+ s->rgb= 1;
+ s->pegasus_rct=1;
+ break;
+ default:
+ printf("unknown colorspace\n");
+ }
+ len -= 9;
+ goto out;
+ }
/* Apple MJPEG-A */
if ((s->start_code == APP1) && (len > (0x28 - 8)))
@@ -1393,6 +1751,9 @@ static int mjpeg_decode_frame(AVCodecContext *avctx,
init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
s->start_code = start_code;
+ if(s->avctx->debug & FF_DEBUG_STARTCODE){
+ printf("startcode: %X\n", start_code);
+ }
/* process markers */
if (start_code >= 0xd0 && start_code <= 0xd7) {
@@ -1418,7 +1779,13 @@ static int mjpeg_decode_frame(AVCodecContext *avctx,
mjpeg_decode_dht(s);
break;
case SOF0:
- if (mjpeg_decode_sof0(s) < 0)
+ s->lossless=0;
+ if (mjpeg_decode_sof(s) < 0)
+ return -1;
+ break;
+ case SOF3:
+ s->lossless=1;
+ if (mjpeg_decode_sof(s) < 0)
return -1;
break;
case EOI:
@@ -1443,7 +1810,10 @@ eoi_parser:
/* XXX: not complete test ! */
switch((s->h_count[0] << 4) | s->v_count[0]) {
case 0x11:
- avctx->pix_fmt = PIX_FMT_YUV444P;
+ if(s->rgb){
+ avctx->pix_fmt = PIX_FMT_RGBA32;
+ }else
+ avctx->pix_fmt = PIX_FMT_YUV444P;
break;
case 0x21:
avctx->pix_fmt = PIX_FMT_YUV422P;
@@ -1471,7 +1841,6 @@ eoi_parser:
break;
case SOF1:
case SOF2:
- case SOF3:
case SOF5:
case SOF6:
case SOF7:
@@ -1570,7 +1939,7 @@ read_header:
{
init_get_bits(&s->gb, buf+sof_offs, (buf_end - (buf+sof_offs))*8);
s->start_code = SOF0;
- if (mjpeg_decode_sof0(s) < 0)
+ if (mjpeg_decode_sof(s) < 0)
return -1;
}
@@ -1668,3 +2037,13 @@ AVCodec mjpegb_decoder = {
0,
NULL
};
+
+AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
+ "ljpeg",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_LJPEG,
+ sizeof(MpegEncContext),
+ MPV_encode_init,
+ encode_picture_lossless,
+ MPV_encode_end,
+};
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-28 11:26:00 +0000