/*
* 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
}
}
+#ifdef CONFIG_ENCODERS
int mjpeg_init(MpegEncContext *s)
{
MJpegContext *m;
{
av_free(s->mjpeg_ctx);
}
+#endif //CONFIG_ENCODERS
#define PREDICT(ret, topleft, top, left, predictor)\
switch(predictor){\
/* JFIF header */
put_marker(p, APP0);
put_bits(p, 16, 16);
- put_string(p, "JFIF"); /* this puts the trailing zero-byte too */
+ put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
put_bits(p, 16, 0x0201); /* v 1.02 */
put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
- switch(s->aspect_ratio_info)
- {
- case FF_ASPECT_4_3_625:
- case FF_ASPECT_4_3_525:
- put_bits(p, 16, 4);
- put_bits(p, 16, 3);
- break;
- case FF_ASPECT_16_9_625:
- case FF_ASPECT_16_9_525:
- put_bits(p, 16, 16);
- put_bits(p, 16, 9);
- break;
- case FF_ASPECT_EXTENDED:
- put_bits(p, 16, s->aspected_width);
- put_bits(p, 16, s->aspected_height);
- break;
- case FF_ASPECT_SQUARE:
- default:
- put_bits(p, 16, 1); /* aspect: 1:1 */
- put_bits(p, 16, 1);
- break;
- }
+ put_bits(p, 16, s->avctx->sample_aspect_ratio.num);
+ put_bits(p, 16, s->avctx->sample_aspect_ratio.den);
put_bits(p, 8, 0); /* thumbnail width */
put_bits(p, 8, 0); /* thumbnail height */
}
flush_put_bits(p);
ptr = pbBufPtr(p);
put_bits(p, 16, 0); /* patched later */
- put_string(p, LIBAVCODEC_IDENT);
+ put_string(p, LIBAVCODEC_IDENT, 1);
size = strlen(LIBAVCODEC_IDENT)+3;
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)
static void escape_FF(MpegEncContext *s, int start)
{
- int size= get_bit_count(&s->pb) - start*8;
+ int size= put_bits_count(&s->pb) - start*8;
int i, ff_count;
uint8_t *buf= s->pb.buf + start;
int align= (-(size_t)(buf))&3;
}
}
+void ff_mjpeg_stuffing(PutBitContext * pbc)
+{
+ int length;
+ length= (-put_bits_count(pbc))&7;
+ if(length) put_bits(pbc, length, (1<<length)-1);
+}
+
void mjpeg_picture_trailer(MpegEncContext *s)
{
- int pad= (-get_bit_count(&s->pb))&7;
-
- put_bits(&s->pb, pad,0xFF>>(8-pad));
+ ff_mjpeg_stuffing(&s->pb);
flush_put_bits(&s->pb);
assert((s->header_bits&7)==0);
AVFrame * const p= (AVFrame*)&s->current_picture;
const int predictor= avctx->prediction_method+1;
- init_put_bits(&s->pb, buf, buf_size, NULL, NULL);
+ init_put_bits(&s->pb, buf, buf_size);
*p = *pict;
p->pict_type= FF_I_TYPE;
mjpeg_picture_header(s);
- s->header_bits= get_bit_count(&s->pb);
-
+ 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++){
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];
}
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++) {
flush_put_bits(&s->pb);
return pbBufPtr(&s->pb) - s->pb.buf;
-// return (get_bit_count(&f->pb)+7)/8;
+// return (put_bits_count(&f->pb)+7)/8;
}
#endif //CONFIG_ENCODERS
VLC vlcs[2][4];
int qscale[4]; ///< quantizer scale calculated from quant_matrixes
- int org_width, org_height; /* size given at codec init */
+ int org_height; /* size given at codec init */
int first_picture; /* true if decoding first picture */
int interlaced; /* true if interlaced */
int bottom_field; /* true if bottom field */
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*/);
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];
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)
/* ugly way to get the idct & scantable FIXME */
memset(&s2, 0, sizeof(MpegEncContext));
- s2.flags= avctx->flags;
s2.avctx= avctx;
// s2->out_format = FMT_MJPEG;
- s2.width = 8;
- s2.height = 8;
- if (MPV_common_init(&s2) < 0)
- return -1;
+ dsputil_init(&s2.dsp, avctx);
+ DCT_common_init(&s2);
+
s->scantable= s2.intra_scantable;
s->idct_put= s2.dsp.idct_put;
- MPV_common_end(&s2);
s->mpeg_enc_ctx_allocated = 0;
s->buffer_size = 102400; /* smaller buffer should be enough,
return -1;
s->start_code = -1;
s->first_picture = 1;
- s->org_width = avctx->width;
- 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)
{
- printf("mjpeg: using external huffman table\n");
+ av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
mjpeg_decode_dht(s);
/* should check for error - but dunno */
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)
{
s->qscale[index]= FFMAX(
s->quant_matrixes[index][s->scantable.permutated[1]],
s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
+ dprintf("qscale[%d]: %d\n", index, s->qscale[index]);
len -= 65;
}
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;
}
}
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");
+ av_log(s->avctx, AV_LOG_ERROR, "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);
+ if(avcodec_check_dimensions(s->avctx, width, height))
+ return -1;
nb_components = get_bits(&s->gb, 8);
if (nb_components <= 0 ||
s->width = width;
s->height = height;
+ avcodec_set_dimensions(s->avctx, width, height);
+
/* test interlaced mode */
if (s->first_picture &&
s->org_height != 0 &&
s->height < ((s->org_height * 3) / 4)) {
s->interlaced = 1;
// s->bottom_field = (s->interlace_polarity) ? 1 : 0;
- s->bottom_field = 0;
+ s->bottom_field = 0;
+ s->avctx->height *= 2;
}
s->qscale_table= av_mallocz((s->width+15)/16);
case 0x11:
if(s->rgb){
s->avctx->pix_fmt = PIX_FMT_RGBA32;
- }else
- s->avctx->pix_fmt = PIX_FMT_YUV444P;
+ }else if(s->nb_components==3)
+ 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;
}
s->picture.reference= 0;
if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
- fprintf(stderr, "get_buffer() failed\n");
+ av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
s->picture.pict_type= I_TYPE;
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);
}
}
// 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;
-//printf("%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);
+//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);
s->idct_put(ptr, s->linesize[c], s->block);
if (++x == h) {
x = 0;
return -1;
}
/* XXX: only interleaved scan accepted */
- if (nb_components != 3)
+ if (nb_components != s->nb_components)
{
dprintf("decode_sos: components(%d) mismatch\n", nb_components);
return -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);
+ 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)
len -= 6;
if(s->avctx->debug & FF_DEBUG_STARTCODE){
- printf("APPx %8X\n", id);
+ av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
}
/* buggy AVID, it puts EOI only at every 10th frame */
if (id == ff_get_fourcc("JFIF"))
{
- int t_w, t_h;
+ int t_w, t_h, v1, v2;
skip_bits(&s->gb, 8); /* the trailing zero-byte */
- printf("mjpeg: JFIF header found (version: %x.%x)\n",
- get_bits(&s->gb, 8), get_bits(&s->gb, 8));
- if (get_bits(&s->gb, 8) == 0)
- {
- int x_density, y_density;
- x_density = get_bits(&s->gb, 16);
- y_density = get_bits(&s->gb, 16);
+ v1= get_bits(&s->gb, 8);
+ v2= get_bits(&s->gb, 8);
+ skip_bits(&s->gb, 8);
- dprintf("x/y density: %d (%f), %d (%f)\n", x_density,
- (float)x_density, y_density, (float)y_density);
-#if 0
- //MN: needs to be checked
- if(x_density)
-// s->avctx->aspect_ratio= s->width*y_density/((float)s->height*x_density);
- s->avctx->aspect_ratio = (float)x_density/y_density;
- /* it's better, but every JFIF I have seen stores 1:1 */
- else
- s->avctx->aspect_ratio= 0.0;
-#endif
- }
- else
- {
- skip_bits(&s->gb, 16);
- skip_bits(&s->gb, 16);
- }
+ s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
+ s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
+
+ if (s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
+ v1, v2,
+ s->avctx->sample_aspect_ratio.num,
+ s->avctx->sample_aspect_ratio.den
+ );
t_w = get_bits(&s->gb, 8);
t_h = get_bits(&s->gb, 8);
if (id == ff_get_fourcc("Adob") && (get_bits(&s->gb, 8) == 'e'))
{
- printf("mjpeg: Adobe header found\n");
+ if (s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
skip_bits(&s->gb, 16); /* version */
skip_bits(&s->gb, 16); /* flags0 */
skip_bits(&s->gb, 16); /* flags1 */
}
if (id == ff_get_fourcc("LJIF")){
- printf("Pegasus lossless jpeg header found\n");
+ if (s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_INFO, "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? */
s->pegasus_rct=1;
break;
default:
- printf("unknown colorspace\n");
+ av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
}
len -= 9;
goto out;
skip_bits(&s->gb, 32); /* scan off */
skip_bits(&s->gb, 32); /* data off */
#endif
- if (s->first_picture)
- printf("mjpeg: Apple MJPEG-A header found\n");
+ if (s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
}
}
out:
/* slow but needed for extreme adobe jpegs */
if (len < 0)
- printf("mjpeg: error, decode_app parser read over the end\n");
+ av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
while(--len > 0)
skip_bits(&s->gb, 8);
else
cbuf[i] = 0;
- printf("mjpeg comment: '%s'\n", cbuf);
+ if(s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
/* buggy avid, it puts EOI only at every 10th frame */
if (!strcmp(cbuf, "AVID"))
// if (s->first_picture)
// printf("mjpeg: workarounding buggy AVID\n");
}
+ else if(!strcmp(cbuf, "CS=ITU601")){
+ s->cs_itu601= 1;
+ }
av_free(cbuf);
}
while (buf_ptr < buf_end) {
v = *buf_ptr++;
v2 = *buf_ptr;
- if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe)) {
+ if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
val = *buf_ptr++;
goto found;
}
{
MJpegDecodeContext *s = avctx->priv_data;
uint8_t *buf_end, *buf_ptr;
- int i, start_code;
+ int start_code;
AVFrame *picture = data;
- *data_size = 0;
-
- /* no supplementary picture */
- if (buf_size == 0)
- return 0;
-
buf_ptr = buf;
buf_end = buf + buf_size;
while (buf_ptr < buf_end) {
*(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)
s->start_code = start_code;
if(s->avctx->debug & FF_DEBUG_STARTCODE){
- printf("startcode: %X\n", start_code);
+ av_log(s->avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
}
/* process markers */
if (start_code >= 0xd0 && start_code <= 0xd7) {
dprintf("restart marker: %d\n", start_code&0x0f);
- } else if (s->first_picture) {
/* APP fields */
- if (start_code >= 0xe0 && start_code <= 0xef)
- mjpeg_decode_app(s);
+ } else if (start_code >= APP0 && start_code <= APP15) {
+ mjpeg_decode_app(s);
/* Comment */
- else if (start_code == COM)
- mjpeg_decode_com(s);
+ } else if (start_code == COM){
+ mjpeg_decode_com(s);
}
switch(start_code) {
break;
case DHT:
if(mjpeg_decode_dht(s) < 0){
- fprintf(stderr, "huffman table decode error\n");
+ av_log(s->avctx, AV_LOG_ERROR, "huffman table decode error\n");
return -1;
}
break;
}
*picture = s->picture;
*data_size = sizeof(AVFrame);
- avctx->height = s->height;
- if (s->interlaced)
- avctx->height *= 2;
- avctx->width = s->width;
if(!s->lossless){
picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
picture->qscale_table= s->qscale_table;
memset(picture->qscale_table, picture->quality, (s->width+15)/16);
if(avctx->debug & FF_DEBUG_QP)
- printf("QP: %d\n", picture->quality);
+ av_log(s->avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
picture->quality*= FF_QP2LAMBDA;
}
case SOF14:
case SOF15:
case JPG:
- printf("mjpeg: unsupported coding type (%x)\n", start_code);
+ av_log(s->avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
break;
// default:
// printf("mjpeg: unsupported marker (%x)\n", start_code);
{
MJpegDecodeContext *s = avctx->priv_data;
uint8_t *buf_end, *buf_ptr;
- int i;
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;
-
- *data_size = 0;
-
- /* no supplementary picture */
- if (buf_size == 0)
- return 0;
+ uint32_t field_size, sod_offs;
buf_ptr = buf;
buf_end = buf + buf_size;
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)
{
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)
{
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)
{
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 */
*picture= s->picture;
*data_size = sizeof(AVFrame);
- avctx->height = s->height;
- if (s->interlaced)
- avctx->height *= 2;
- avctx->width = s->width;
if(!s->lossless){
picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
picture->qscale_table= s->qscale_table;
memset(picture->qscale_table, picture->quality, (s->width+15)/16);
if(avctx->debug & FF_DEBUG_QP)
- printf("QP: %d\n", picture->quality);
+ av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
picture->quality*= FF_QP2LAMBDA;
}
return buf_ptr - buf;
}
+#include "sp5x.h"
+
+static int sp5x_decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ uint8_t *buf, int buf_size)
+{
+#if 0
+ MJpegDecodeContext *s = avctx->priv_data;
+#endif
+ const int qscale = 5;
+ uint8_t *buf_ptr, *buf_end, *recoded;
+ int i = 0, j = 0;
+
+ if (!avctx->width || !avctx->height)
+ return -1;
+
+ buf_ptr = buf;
+ buf_end = buf + buf_size;
+
+#if 1
+ recoded = av_mallocz(buf_size + 1024);
+ if (!recoded)
+ return -1;
+
+ /* SOI */
+ recoded[j++] = 0xFF;
+ recoded[j++] = 0xD8;
+
+ memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
+ memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);
+ memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);
+ j += sizeof(sp5x_data_dqt);
+
+ memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
+ j += sizeof(sp5x_data_dht);
+
+ memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
+ 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));
+ j += sizeof(sp5x_data_sos);
+
+ for (i = 14; i < buf_size && j < buf_size+1024-2; i++)
+ {
+ recoded[j++] = buf[i];
+ if (buf[i] == 0xff)
+ recoded[j++] = 0;
+ }
+
+ /* EOI */
+ recoded[j++] = 0xFF;
+ recoded[j++] = 0xD9;
+
+ i = mjpeg_decode_frame(avctx, data, data_size, recoded, j);
+
+ av_free(recoded);
+
+#else
+ /* SOF */
+ s->bits = 8;
+ s->width = avctx->coded_width;
+ s->height = avctx->coded_height;
+ s->nb_components = 3;
+ s->component_id[0] = 0;
+ s->h_count[0] = 2;
+ s->v_count[0] = 2;
+ s->quant_index[0] = 0;
+ s->component_id[1] = 1;
+ s->h_count[1] = 1;
+ s->v_count[1] = 1;
+ s->quant_index[1] = 1;
+ s->component_id[2] = 2;
+ s->h_count[2] = 1;
+ s->v_count[2] = 1;
+ s->quant_index[2] = 1;
+ s->h_max = 2;
+ s->v_max = 2;
+
+ s->qscale_table = av_mallocz((s->width+15)/16);
+ avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420;
+ s->interlaced = 0;
+
+ s->picture.reference = 0;
+ if (avctx->get_buffer(avctx, &s->picture) < 0)
+ {
+ fprintf(stderr, "get_buffer() failed\n");
+ return -1;
+ }
+
+ s->picture.pict_type = I_TYPE;
+ s->picture.key_frame = 1;
+
+ for (i = 0; i < 3; i++)
+ s->linesize[i] = s->picture.linesize[i] << s->interlaced;
+
+ /* DQT */
+ for (i = 0; i < 64; i++)
+ {
+ j = s->scantable.permutated[i];
+ s->quant_matrixes[0][j] = sp5x_quant_table[(qscale * 2) + i];
+ }
+ s->qscale[0] = FFMAX(
+ s->quant_matrixes[0][s->scantable.permutated[1]],
+ s->quant_matrixes[0][s->scantable.permutated[8]]) >> 1;
+
+ for (i = 0; i < 64; i++)
+ {
+ j = s->scantable.permutated[i];
+ s->quant_matrixes[1][j] = sp5x_quant_table[(qscale * 2) + 1 + i];
+ }
+ s->qscale[1] = FFMAX(
+ s->quant_matrixes[1][s->scantable.permutated[1]],
+ s->quant_matrixes[1][s->scantable.permutated[8]]) >> 1;
+
+ /* DHT */
+
+ /* SOS */
+ s->comp_index[0] = 0;
+ s->nb_blocks[0] = s->h_count[0] * s->v_count[0];
+ s->h_scount[0] = s->h_count[0];
+ s->v_scount[0] = s->v_count[0];
+ s->dc_index[0] = 0;
+ s->ac_index[0] = 0;
+
+ s->comp_index[1] = 1;
+ s->nb_blocks[1] = s->h_count[1] * s->v_count[1];
+ s->h_scount[1] = s->h_count[1];
+ s->v_scount[1] = s->v_count[1];
+ s->dc_index[1] = 1;
+ s->ac_index[1] = 1;
+
+ s->comp_index[2] = 2;
+ s->nb_blocks[2] = s->h_count[2] * s->v_count[2];
+ s->h_scount[2] = s->h_count[2];
+ s->v_scount[2] = s->v_count[2];
+ s->dc_index[2] = 1;
+ s->ac_index[2] = 1;
+
+ for (i = 0; i < 3; i++)
+ s->last_dc[i] = 1024;
+
+ s->mb_width = (s->width * s->h_max * 8 -1) / (s->h_max * 8);
+ s->mb_height = (s->height * s->v_max * 8 -1) / (s->v_max * 8);
+
+ init_get_bits(&s->gb, buf+14, (buf_size-14)*8);
+
+ return mjpeg_decode_scan(s);
+#endif
+
+ return i;
+}
static int mjpeg_decode_end(AVCodecContext *avctx)
{
av_free(s->buffer);
av_free(s->qscale_table);
- avcodec_default_free_buffers(avctx);
for(i=0;i<2;i++) {
for(j=0;j<4;j++)
NULL
};
+AVCodec sp5x_decoder = {
+ "sp5x",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_SP5X,
+ sizeof(MJpegDecodeContext),
+ mjpeg_decode_init,
+ NULL,
+ mjpeg_decode_end,
+ sp5x_decode_frame,
+ CODEC_CAP_DR1,
+ NULL
+};
+
#ifdef CONFIG_ENCODERS
AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
"ljpeg",
MPV_encode_end,
};
#endif
+
+AVCodecParser mjpeg_parser = {
+ { CODEC_ID_MJPEG },
+ sizeof(ParseContext),
+ NULL,
+ jpeg_parse,
+ ff_parse_close,
+};
+
projects / ffmpeg / blobdiff