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Diffstat (limited to 'src/libffmpeg/libavcodec/mjpeg.c')
-rw-r--r--src/libffmpeg/libavcodec/mjpeg.c201
1 files changed, 151 insertions, 50 deletions
diff --git a/src/libffmpeg/libavcodec/mjpeg.c b/src/libffmpeg/libavcodec/mjpeg.c
index 4e2305aef..4c2b4793b 100644
--- a/src/libffmpeg/libavcodec/mjpeg.c
+++ b/src/libffmpeg/libavcodec/mjpeg.c
@@ -1,6 +1,8 @@
/*
* MJPEG encoder and decoder
* Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2003 Alex Beregszaszi
+ * Copyright (c) 2003-2004 Michael Niedermayer
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@@ -398,6 +400,19 @@ static void jpeg_put_comments(MpegEncContext *s)
ptr[0] = size >> 8;
ptr[1] = size;
}
+
+ if( s->avctx->pix_fmt == PIX_FMT_YUV420P
+ ||s->avctx->pix_fmt == PIX_FMT_YUV422P
+ ||s->avctx->pix_fmt == PIX_FMT_YUV444P){
+ put_marker(p, COM);
+ flush_put_bits(p);
+ ptr = pbBufPtr(p);
+ put_bits(p, 16, 0); /* patched later */
+ put_string(p, "CS=ITU601", 1);
+ size = strlen("CS=ITU601")+3;
+ ptr[0] = size >> 8;
+ ptr[1] = size;
+ }
}
void mjpeg_picture_header(MpegEncContext *s)
@@ -657,11 +672,11 @@ static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, in
mjpeg_picture_header(s);
s->header_bits= put_bits_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];
+ uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
int left[3], top[3], topleft[3];
for(i=0; i<3; i++){
@@ -672,6 +687,11 @@ static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, in
const int modified_predictor= y ? predictor : 1;
uint8_t *ptr = p->data[0] + (linesize * y);
+ if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < width*3*4){
+ av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+ return -1;
+ }
+
for(i=0; i<3; i++){
top[i]= left[i]= topleft[i]= buffer[0][i];
}
@@ -705,6 +725,10 @@ static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, in
const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
for(mb_y = 0; mb_y < mb_height; mb_y++) {
+ if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
+ av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+ return -1;
+ }
for(mb_x = 0; mb_x < mb_width; mb_x++) {
if(mb_x==0 || mb_y==0){
for(i=0;i<3;i++) {
@@ -825,7 +849,7 @@ typedef struct MJpegDecodeContext {
int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */
AVFrame picture; /* picture structure */
int linesize[MAX_COMPONENTS]; ///< linesize << interlaced
- uint8_t *qscale_table;
+ int8_t *qscale_table;
DCTELEM block[64] __align8;
ScanTable scantable;
void (*idct_put)(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/);
@@ -834,13 +858,16 @@ typedef struct MJpegDecodeContext {
int restart_count;
int buggy_avid;
+ int cs_itu601;
int interlace_polarity;
+
+ int mjpb_skiptosod;
} MJpegDecodeContext;
static int mjpeg_decode_dht(MJpegDecodeContext *s);
static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
- int nb_codes)
+ int nb_codes, int use_static)
{
uint8_t huff_size[256];
uint16_t huff_code[256];
@@ -848,7 +875,7 @@ static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_tab
memset(huff_size, 0, sizeof(huff_size));
build_huffman_codes(huff_size, huff_code, bits_table, val_table);
- return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2);
+ return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, use_static);
}
static int mjpeg_decode_init(AVCodecContext *avctx)
@@ -876,12 +903,12 @@ static int mjpeg_decode_init(AVCodecContext *avctx)
return -1;
s->start_code = -1;
s->first_picture = 1;
- s->org_height = avctx->height;
+ s->org_height = avctx->coded_height;
- build_vlc(&s->vlcs[0][0], bits_dc_luminance, val_dc_luminance, 12);
- build_vlc(&s->vlcs[0][1], bits_dc_chrominance, val_dc_chrominance, 12);
- build_vlc(&s->vlcs[1][0], bits_ac_luminance, val_ac_luminance, 251);
- build_vlc(&s->vlcs[1][1], bits_ac_chrominance, val_ac_chrominance, 251);
+ build_vlc(&s->vlcs[0][0], bits_dc_luminance, val_dc_luminance, 12, 0);
+ build_vlc(&s->vlcs[0][1], bits_dc_chrominance, val_dc_chrominance, 12, 0);
+ build_vlc(&s->vlcs[1][0], bits_ac_luminance, val_ac_luminance, 251, 0);
+ build_vlc(&s->vlcs[1][1], bits_ac_chrominance, val_ac_chrominance, 251, 0);
if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
{
@@ -894,6 +921,69 @@ static int mjpeg_decode_init(AVCodecContext *avctx)
return 0;
}
+
+/**
+ * finds the end of the current frame in the bitstream.
+ * @return the position of the first byte of the next frame, or -1
+ */
+static int find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){
+ int vop_found, i;
+ uint16_t state;
+
+ vop_found= pc->frame_start_found;
+ state= pc->state;
+
+ i=0;
+ if(!vop_found){
+ for(i=0; i<buf_size; i++){
+ state= (state<<8) | buf[i];
+ if(state == 0xFFD8){
+ i++;
+ vop_found=1;
+ break;
+ }
+ }
+ }
+
+ if(vop_found){
+ /* EOF considered as end of frame */
+ if (buf_size == 0)
+ return 0;
+ for(; i<buf_size; i++){
+ state= (state<<8) | buf[i];
+ if(state == 0xFFD8){
+ pc->frame_start_found=0;
+ pc->state=0;
+ return i-1;
+ }
+ }
+ }
+ pc->frame_start_found= vop_found;
+ pc->state= state;
+ return END_NOT_FOUND;
+}
+
+static int jpeg_parse(AVCodecParserContext *s,
+ AVCodecContext *avctx,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size)
+{
+ ParseContext *pc = s->priv_data;
+ int next;
+
+ next= find_frame_end(pc, buf, buf_size);
+
+ if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
+ *poutbuf = NULL;
+ *poutbuf_size = 0;
+ return buf_size;
+ }
+
+ *poutbuf = (uint8_t *)buf;
+ *poutbuf_size = buf_size;
+ return next;
+}
+
/* quantize tables */
static int mjpeg_decode_dqt(MJpegDecodeContext *s)
{
@@ -969,7 +1059,7 @@ static int mjpeg_decode_dht(MJpegDecodeContext *s)
free_vlc(&s->vlcs[class][index]);
dprintf("class=%d index=%d nb_codes=%d\n",
class, index, code_max + 1);
- if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1) < 0){
+ if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0) < 0){
return -1;
}
}
@@ -993,7 +1083,10 @@ static int mjpeg_decode_sof(MJpegDecodeContext *s)
}
height = get_bits(&s->gb, 16);
width = get_bits(&s->gb, 16);
+
dprintf("sof0: picture: %dx%d\n", width, height);
+ if(avcodec_check_dimensions(s->avctx, width, height))
+ return -1;
nb_components = get_bits(&s->gb, 8);
if (nb_components <= 0 ||
@@ -1028,8 +1121,7 @@ static int mjpeg_decode_sof(MJpegDecodeContext *s)
s->width = width;
s->height = height;
- s->avctx->width = s->width;
- s->avctx->height = s->height;
+ avcodec_set_dimensions(s->avctx, width, height);
/* test interlaced mode */
if (s->first_picture &&
@@ -1055,16 +1147,16 @@ static int mjpeg_decode_sof(MJpegDecodeContext *s)
if(s->rgb){
s->avctx->pix_fmt = PIX_FMT_RGBA32;
}else if(s->nb_components==3)
- s->avctx->pix_fmt = PIX_FMT_YUV444P;
+ s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
else
s->avctx->pix_fmt = PIX_FMT_GRAY8;
break;
case 0x21:
- s->avctx->pix_fmt = PIX_FMT_YUV422P;
+ s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
break;
default:
case 0x22:
- s->avctx->pix_fmt = PIX_FMT_YUV420P;
+ s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
break;
}
@@ -1162,11 +1254,14 @@ static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
int i, mb_x, mb_y;
- uint16_t buffer[2048][4];
+ uint16_t buffer[32768][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;
+
for(i=0; i<3; i++){
buffer[0][i]= 1 << (s->bits + point_transform - 1);
}
@@ -1336,8 +1431,8 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s){
}
// dprintf("mb: %d %d processed\n", mb_y, mb_x);
ptr = s->picture.data[c] +
- (s->linesize[c] * (v * mb_y + y) * 8) +
- (h * mb_x + x) * 8;
+ (((s->linesize[c] * (v * mb_y + y) * 8) +
+ (h * mb_x + x) * 8) >> s->avctx->lowres);
if (s->interlaced && s->bottom_field)
ptr += s->linesize[c] >> 1;
//av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n", mb_x, mb_y, x, y, c, s->bottom_field, (v * mb_y + y) * 8, (h * mb_x + x) * 8);
@@ -1453,6 +1548,10 @@ static int mjpeg_decode_sos(MJpegDecodeContext *s)
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "", predictor, point_transform);
+ /* mjpeg-b can have padding bytes between sos and image data, skip them */
+ for (i = s->mjpb_skiptosod; i > 0; i--)
+ skip_bits(&s->gb, 8);
+
if(s->lossless){
if(s->rgb){
if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
@@ -1652,6 +1751,9 @@ static int mjpeg_decode_com(MJpegDecodeContext *s)
// if (s->first_picture)
// printf("mjpeg: workarounding buggy AVID\n");
}
+ else if(!strcmp(cbuf, "CS=ITU601")){
+ s->cs_itu601= 1;
+ }
av_free(cbuf);
}
@@ -1724,10 +1826,6 @@ static int mjpeg_decode_frame(AVCodecContext *avctx,
int start_code;
AVFrame *picture = data;
- /* no supplementary picture */
- if (buf_size == 0)
- return 0;
-
buf_ptr = buf;
buf_end = buf + buf_size;
while (buf_ptr < buf_end) {
@@ -1762,9 +1860,9 @@ static int mjpeg_decode_frame(AVCodecContext *avctx,
*(dst++) = x;
if (x == 0xff)
{
- while(*src == 0xff) src++;
+ while(src<buf_end && x == 0xff)
+ x = *(src++);
- x = *(src++);
if (x >= 0xd0 && x <= 0xd7)
*(dst++) = x;
else if (x)
@@ -1898,11 +1996,7 @@ static int mjpegb_decode_frame(AVCodecContext *avctx,
AVFrame *picture = data;
GetBitContext hgb; /* for the header */
uint32_t dqt_offs, dht_offs, sof_offs, sos_offs, second_field_offs;
- uint32_t field_size;
-
- /* no supplementary picture */
- if (buf_size == 0)
- return 0;
+ uint32_t field_size, sod_offs;
buf_ptr = buf;
buf_end = buf + buf_size;
@@ -1910,26 +2004,27 @@ static int mjpegb_decode_frame(AVCodecContext *avctx,
read_header:
/* reset on every SOI */
s->restart_interval = 0;
+ s->mjpb_skiptosod = 0;
init_get_bits(&hgb, buf_ptr, /*buf_size*/(buf_end - buf_ptr)*8);
skip_bits(&hgb, 32); /* reserved zeros */
- if (get_bits(&hgb, 32) != be2me_32(ff_get_fourcc("mjpg")))
+ if (get_bits_long(&hgb, 32) != be2me_32(ff_get_fourcc("mjpg")))
{
dprintf("not mjpeg-b (bad fourcc)\n");
return 0;
}
- field_size = get_bits(&hgb, 32); /* field size */
+ field_size = get_bits_long(&hgb, 32); /* field size */
dprintf("field size: 0x%x\n", field_size);
skip_bits(&hgb, 32); /* padded field size */
- second_field_offs = get_bits(&hgb, 32);
+ second_field_offs = get_bits_long(&hgb, 32);
dprintf("second field offs: 0x%x\n", second_field_offs);
if (second_field_offs)
s->interlaced = 1;
- dqt_offs = get_bits(&hgb, 32);
+ dqt_offs = get_bits_long(&hgb, 32);
dprintf("dqt offs: 0x%x\n", dqt_offs);
if (dqt_offs)
{
@@ -1938,7 +2033,7 @@ read_header:
mjpeg_decode_dqt(s);
}
- dht_offs = get_bits(&hgb, 32);
+ dht_offs = get_bits_long(&hgb, 32);
dprintf("dht offs: 0x%x\n", dht_offs);
if (dht_offs)
{
@@ -1947,7 +2042,7 @@ read_header:
mjpeg_decode_dht(s);
}
- sof_offs = get_bits(&hgb, 32);
+ sof_offs = get_bits_long(&hgb, 32);
dprintf("sof offs: 0x%x\n", sof_offs);
if (sof_offs)
{
@@ -1957,18 +2052,19 @@ read_header:
return -1;
}
- sos_offs = get_bits(&hgb, 32);
+ sos_offs = get_bits_long(&hgb, 32);
dprintf("sos offs: 0x%x\n", sos_offs);
+ sod_offs = get_bits_long(&hgb, 32);
+ dprintf("sod offs: 0x%x\n", sod_offs);
if (sos_offs)
{
// init_get_bits(&s->gb, buf+sos_offs, (buf_end - (buf+sos_offs))*8);
init_get_bits(&s->gb, buf+sos_offs, field_size*8);
+ s->mjpb_skiptosod = (sod_offs - sos_offs - show_bits(&s->gb, 16));
s->start_code = SOS;
mjpeg_decode_sos(s);
}
- skip_bits(&hgb, 32); /* start of data offset */
-
if (s->interlaced) {
s->bottom_field ^= 1;
/* if not bottom field, do not output image yet */
@@ -2011,10 +2107,6 @@ static int sp5x_decode_frame(AVCodecContext *avctx,
uint8_t *buf_ptr, *buf_end, *recoded;
int i = 0, j = 0;
- /* no supplementary picture */
- if (buf_size == 0)
- return 0;
-
if (!avctx->width || !avctx->height)
return -1;
@@ -2039,10 +2131,10 @@ static int sp5x_decode_frame(AVCodecContext *avctx,
j += sizeof(sp5x_data_dht);
memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
- recoded[j+5] = (avctx->height >> 8) & 0xFF;
- recoded[j+6] = avctx->height & 0xFF;
- recoded[j+7] = (avctx->width >> 8) & 0xFF;
- recoded[j+8] = avctx->width & 0xFF;
+ recoded[j+5] = (avctx->coded_height >> 8) & 0xFF;
+ recoded[j+6] = avctx->coded_height & 0xFF;
+ recoded[j+7] = (avctx->coded_width >> 8) & 0xFF;
+ recoded[j+8] = avctx->coded_width & 0xFF;
j += sizeof(sp5x_data_sof);
memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
@@ -2066,8 +2158,8 @@ static int sp5x_decode_frame(AVCodecContext *avctx,
#else
/* SOF */
s->bits = 8;
- s->width = avctx->width;
- s->height = avctx->height;
+ s->width = avctx->coded_width;
+ s->height = avctx->coded_height;
s->nb_components = 3;
s->component_id[0] = 0;
s->h_count[0] = 2;
@@ -2085,7 +2177,7 @@ static int sp5x_decode_frame(AVCodecContext *avctx,
s->v_max = 2;
s->qscale_table = av_mallocz((s->width+15)/16);
- avctx->pix_fmt = PIX_FMT_YUV420P;
+ avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420;
s->interlaced = 0;
s->picture.reference = 0;
@@ -2223,3 +2315,12 @@ AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
MPV_encode_end,
};
#endif
+
+AVCodecParser mjpeg_parser = {
+ { CODEC_ID_MJPEG },
+ sizeof(ParseContext),
+ NULL,
+ jpeg_parse,
+ ff_parse_close,
+};
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-26 21:09:09 +0000