*/
/**
- * @file libavcodec/mjpegdec.c
+ * @file
* MJPEG decoder.
*/
//#define DEBUG
#include <assert.h>
+#include "libavcore/imgutils.h"
#include "avcodec.h"
#include "dsputil.h"
#include "mjpeg.h"
static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
int nb_codes, int use_static, int is_ac)
{
- uint8_t huff_size[256+16];
- uint16_t huff_code[256+16];
+ uint8_t huff_size[256];
+ uint16_t huff_code[256];
+ uint16_t huff_sym[256];
+ int i;
assert(nb_codes <= 256);
memset(huff_size, 0, sizeof(huff_size));
ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
- if(is_ac){
- memmove(huff_size+16, huff_size, sizeof(uint8_t)*nb_codes);
- memmove(huff_code+16, huff_code, sizeof(uint16_t)*nb_codes);
- memset(huff_size, 0, sizeof(uint8_t)*16);
- memset(huff_code, 0, sizeof(uint16_t)*16);
- nb_codes += 16;
- }
+ for(i=0; i<256; i++)
+ huff_sym[i]= i + 16*is_ac;
+
+ if(is_ac) huff_sym[0]= 16*256;
- return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, use_static);
+ return init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, huff_sym, 2, 2, use_static);
}
static void build_basic_mjpeg_vlc(MJpegDecodeContext * s) {
ff_mjpeg_val_ac_luminance, 251, 0, 1);
build_vlc(&s->vlcs[1][1], ff_mjpeg_bits_ac_chrominance,
ff_mjpeg_val_ac_chrominance, 251, 0, 1);
+ build_vlc(&s->vlcs[2][0], ff_mjpeg_bits_ac_luminance,
+ ff_mjpeg_val_ac_luminance, 251, 0, 0);
+ build_vlc(&s->vlcs[2][1], ff_mjpeg_bits_ac_chrominance,
+ ff_mjpeg_val_ac_chrominance, 251, 0, 0);
}
av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
}
}
+ if (avctx->codec->id == CODEC_ID_AMV)
+ s->flipped = 1;
return 0;
}
if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
return -1;
}
+
+ if(class>0){
+ free_vlc(&s->vlcs[2][index]);
+ if(build_vlc(&s->vlcs[2][index], bits_table, val_table, code_max + 1, 0, 0) < 0){
+ return -1;
+ }
+ }
}
return 0;
}
height= s->height;
av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
- if(avcodec_check_dimensions(s->avctx, width, height))
+ if(av_image_check_size(width, height, 0, s->avctx))
return -1;
nb_components = get_bits(&s->gb, 8);
(s->h_count[2] << 12) | (s->v_count[2] << 8) |
(s->h_count[3] << 4) | s->v_count[3];
av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
- if(!(pix_fmt_id & 0x10101010))
+ //NOTE we do not allocate pictures large enough for the possible padding of h/v_count being 4
+ if(!(pix_fmt_id & 0xD0D0D0D0))
pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
- if(!(pix_fmt_id & 0x01010101))
+ if(!(pix_fmt_id & 0x0D0D0D0D))
pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
switch(pix_fmt_id){
case 0x11111100:
if(s->rgb){
- s->avctx->pix_fmt = PIX_FMT_RGB32;
+ s->avctx->pix_fmt = PIX_FMT_BGRA;
}else
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
assert(s->nb_components==3);
/* AC coefs */
i = 0;
{OPEN_READER(re, &s->gb)
- for(;;) {
+ do {
UPDATE_CACHE(re, &s->gb);
GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
- /* EOB */
- if (code == 0x10)
- break;
i += ((unsigned)code) >> 4;
- if(code != 0x100){
code &= 0xf;
+ if(code){
if(code > MIN_CACHE_BITS - 16){
UPDATE_CACHE(re, &s->gb)
}
LAST_SKIP_BITS(re, &s->gb, code)
- if (i >= 63) {
- if(i == 63){
- j = s->scantable.permutated[63];
- block[j] = level * quant_matrix[j];
- break;
- }
+ if (i > 63) {
av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
return -1;
}
j = s->scantable.permutated[i];
block[j] = level * quant_matrix[j];
}
- }
+ }while(i<63);
CLOSE_READER(re, &s->gb)}
return 0;
{OPEN_READER(re, &s->gb)
for(i=ss;;i++) {
UPDATE_CACHE(re, &s->gb);
- GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
- /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
- code -= 16;
- if(code & 0xF) {
- i += ((unsigned) code) >> 4;
- code &= 0xf;
+ GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2)
+
+ run = ((unsigned) code) >> 4;
+ code &= 0xF;
+ if(code) {
+ i += run;
if(code > MIN_CACHE_BITS - 16){
UPDATE_CACHE(re, &s->gb)
}
j = s->scantable.permutated[i];
block[j] = level * quant_matrix[j] << Al;
}else{
- run = ((unsigned) code) >> 4;
if(run == 0xF){// ZRL - skip 15 coefficients
i += 15;
+ if (i >= se) {
+ av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
+ return -1;
+ }
}else{
- val = run;
- run = (1 << run);
- UPDATE_CACHE(re, &s->gb);
- run += (GET_CACHE(re, &s->gb) >> (32 - val)) & (run - 1);
- if(val)
- LAST_SKIP_BITS(re, &s->gb, val);
- *EOBRUN = run - 1;
+ val = (1 << run);
+ if(run){
+ UPDATE_CACHE(re, &s->gb);
+ val += NEG_USR32(GET_CACHE(re, &s->gb), run);
+ LAST_SKIP_BITS(re, &s->gb, run);
+ }
+ *EOBRUN = val - 1;
break;
}
}
else {
for(;;i++) {
UPDATE_CACHE(re, &s->gb);
- GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
- /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */
- code -= 16;
+ GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2)
+
if(code & 0xF) {
run = ((unsigned) code) >> 4;
UPDATE_CACHE(re, &s->gb);
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
int i, mb_x, mb_y;
- uint16_t buffer[32768][4];
+ uint16_t (*buffer)[4];
int left[3], top[3], topleft[3];
const int linesize= s->linesize[0];
const int mask= (1<<s->bits)-1;
- if((unsigned)s->mb_width > 32768) //dynamic alloc
- return -1;
+ av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
+ buffer= s->ljpeg_buffer;
for(i=0; i<3; i++){
buffer[0][i]= 1 << (s->bits + point_transform - 1);
}
}else{
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
- ptr[4*mb_x+0] = buffer[mb_x][0];
+ ptr[4*mb_x+0] = buffer[mb_x][2];
ptr[4*mb_x+1] = buffer[mb_x][1];
- ptr[4*mb_x+2] = buffer[mb_x][2];
+ ptr[4*mb_x+2] = buffer[mb_x][0];
}
}
}
uint8_t* data[MAX_COMPONENTS];
int linesize[MAX_COMPONENTS];
+ if(s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
+ av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
+ s->flipped = 0;
+ }
for(i=0; i < nb_components; i++) {
int c = s->comp_index[i];
data[c] = s->picture.data[c];
linesize[c]=s->linesize[c];
s->coefs_finished[c] |= 1;
- if(s->avctx->codec->id==CODEC_ID_AMV) {
+ if(s->flipped) {
//picture should be flipped upside-down for this codec
- assert(!(s->avctx->flags & CODEC_FLAG_EMU_EDGE));
data[c] += (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
linesize[c] *= -1;
}
/* XXX: verify len field validity */
len = get_bits(&s->gb, 16);
nb_components = get_bits(&s->gb, 8);
+ if (nb_components == 0 || nb_components > MAX_COMPONENTS){
+ av_log(s->avctx, AV_LOG_ERROR, "decode_sos: nb_components (%d) unsupported\n", nb_components);
+ return -1;
+ }
if (len != 6+2*nb_components)
{
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
return -1;
}
+ /* Metasoft MJPEG codec has Cb and Cr swapped */
+ if (s->avctx->codec_tag == MKTAG('M', 'T', 'S', 'J')
+ && nb_components == 3 && s->nb_components == 3 && i)
+ index = 3 - i;
s->comp_index[i] = index;
}
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "",
+ av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
predictor, point_transform, ilv, s->bits,
s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
return -1;
- id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
- id = be2me_32(id);
+ id = get_bits_long(&s->gb, 32);
+ id = av_be2ne32(id);
len -= 6;
if(s->avctx->debug & FF_DEBUG_STARTCODE){
/* Apple MJPEG-A */
if ((s->start_code == APP1) && (len > (0x28 - 8)))
{
- id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
- id = be2me_32(id);
+ id = get_bits_long(&s->gb, 32);
+ id = av_be2ne32(id);
len -= 4;
if (id == AV_RL32("mjpg")) /* Apple MJPEG-A */
{
else if(!strcmp(cbuf, "CS=ITU601")){
s->cs_itu601= 1;
}
+ else if((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
+ (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20))){
+ s->flipped = 1;
+ }
av_free(cbuf);
}
av_free(s->buffer);
av_free(s->qscale_table);
+ av_freep(&s->ljpeg_buffer);
+ s->ljpeg_buffer_size=0;
- for(i=0;i<2;i++) {
+ for(i=0;i<3;i++) {
for(j=0;j<4;j++)
free_vlc(&s->vlcs[i][j]);
}
AVCodec mjpeg_decoder = {
"mjpeg",
- CODEC_TYPE_VIDEO,
+ AVMEDIA_TYPE_VIDEO,
CODEC_ID_MJPEG,
sizeof(MJpegDecodeContext),
ff_mjpeg_decode_init,
ff_mjpeg_decode_frame,
CODEC_CAP_DR1,
NULL,
+ .max_lowres = 8,
.long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
};
AVCodec thp_decoder = {
"thp",
- CODEC_TYPE_VIDEO,
+ AVMEDIA_TYPE_VIDEO,
CODEC_ID_THP,
sizeof(MJpegDecodeContext),
ff_mjpeg_decode_init,
ff_mjpeg_decode_frame,
CODEC_CAP_DR1,
NULL,
+ .max_lowres = 3,
.long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
};