* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Support for external huffman table, various fixes (AVID workaround),
- * aspecting and new decode_frame mechanism
+ * aspecting, new decode_frame mechanism and apple mjpeg-b support
* by Alex Beregszaszi <alex@naxine.org>
*/
+
+/**
+ * @file mjpeg.c
+ * MJPEG encoder and decoder.
+ */
+
//#define DEBUG
+#include <assert.h>
+
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#undef TWOMATRIXES
typedef struct MJpegContext {
- UINT8 huff_size_dc_luminance[12];
- UINT16 huff_code_dc_luminance[12];
- UINT8 huff_size_dc_chrominance[12];
- UINT16 huff_code_dc_chrominance[12];
-
- UINT8 huff_size_ac_luminance[256];
- UINT16 huff_code_ac_luminance[256];
- UINT8 huff_size_ac_chrominance[256];
- UINT16 huff_code_ac_chrominance[256];
+ 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];
+
+ uint8_t huff_size_ac_luminance[256];
+ uint16_t huff_code_ac_luminance[256];
+ uint8_t huff_size_ac_chrominance[256];
+ uint16_t huff_code_ac_chrominance[256];
} MJpegContext;
/* JPEG marker codes */
/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
/* IMPORTANT: these are only valid for 8-bit data precision! */
-static const UINT8 bits_dc_luminance[17] =
+static const uint8_t bits_dc_luminance[17] =
{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
-static const UINT8 val_dc_luminance[] =
+static const uint8_t val_dc_luminance[] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
-static const UINT8 bits_dc_chrominance[17] =
+static const uint8_t bits_dc_chrominance[17] =
{ /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
-static const UINT8 val_dc_chrominance[] =
+static const uint8_t val_dc_chrominance[] =
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
-static const UINT8 bits_ac_luminance[17] =
+static const uint8_t bits_ac_luminance[17] =
{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
-static const UINT8 val_ac_luminance[] =
+static const uint8_t val_ac_luminance[] =
{ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
0xf9, 0xfa
};
-static const UINT8 bits_ac_chrominance[17] =
+static const uint8_t bits_ac_chrominance[17] =
{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
-static const UINT8 val_ac_chrominance[] =
+static const uint8_t val_ac_chrominance[] =
{ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
};
/* isn't this function nicer than the one in the libjpeg ? */
-static void build_huffman_codes(UINT8 *huff_size, UINT16 *huff_code,
- const UINT8 *bits_table, const UINT8 *val_table)
+static void build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
+ const uint8_t *bits_table, const uint8_t *val_table)
{
int i, j, k,nb, code, sym;
s->min_qcoeff=-1023;
s->max_qcoeff= 1023;
- s->intra_quant_bias= 1<<(QUANT_BIAS_SHIFT-1); //(a + x/2)/x
/* build all the huffman tables */
build_huffman_codes(m->huff_size_dc_luminance,
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;\
+ }
+
+#ifdef CONFIG_ENCODERS
static inline void put_marker(PutBitContext *p, int code)
{
put_bits(p, 8, 0xff);
/* table_class: 0 = DC coef, 1 = AC coefs */
static int put_huffman_table(MpegEncContext *s, int table_class, int table_id,
- const UINT8 *bits_table, const UINT8 *value_table)
+ const uint8_t *bits_table, const uint8_t *value_table)
{
PutBitContext *p = &s->pb;
int n, i;
{
PutBitContext *p = &s->pb;
int i, j, size;
- UINT8 *ptr;
+ uint8_t *ptr;
/* quant matrixes */
put_marker(p, DQT);
{
PutBitContext *p = &s->pb;
int size;
- UINT8 *ptr;
+ uint8_t *ptr;
- if (s->aspect_ratio_info)
+ if (s->aspect_ratio_info /* && !lossless */)
{
/* JFIF header */
put_marker(p, APP0);
}
/* comment */
- if(!ff_bit_exact){
+ if(!(s->flags & CODEC_FLAG_BITEXACT)){
put_marker(p, COM);
flush_put_bits(p);
ptr = pbBufPtr(p);
put_bits(p, 16, 0); /* patched later */
-#define MJPEG_VERSION "FFmpeg" LIBAVCODEC_VERSION "b" LIBAVCODEC_BUILD_STR
- put_string(p, MJPEG_VERSION);
- size = strlen(MJPEG_VERSION)+3;
-#undef MJPEG_VERSION
+ put_string(p, LIBAVCODEC_IDENT);
+ size = strlen(LIBAVCODEC_IDENT)+3;
ptr[0] = size >> 8;
ptr[1] = size;
}
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)
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 */
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
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
/* 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) */
}
+static void escape_FF(MpegEncContext *s, int start)
+{
+ int size= get_bit_count(&s->pb) - start*8;
+ int i, ff_count;
+ uint8_t *buf= s->pb.buf + start;
+ int align= (-(size_t)(buf))&3;
+
+ assert((size&7) == 0);
+ size >>= 3;
+
+ ff_count=0;
+ for(i=0; i<size && i<align; i++){
+ if(buf[i]==0xFF) ff_count++;
+ }
+ for(; i<size-15; i+=16){
+ int acc, v;
+
+ v= *(uint32_t*)(&buf[i]);
+ acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
+ v= *(uint32_t*)(&buf[i+4]);
+ acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
+ v= *(uint32_t*)(&buf[i+8]);
+ acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
+ v= *(uint32_t*)(&buf[i+12]);
+ acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
+
+ acc>>=4;
+ acc+= (acc>>16);
+ acc+= (acc>>8);
+ ff_count+= acc&0xFF;
+ }
+ for(; i<size; i++){
+ if(buf[i]==0xFF) ff_count++;
+ }
+
+ if(ff_count==0) return;
+
+ /* skip put bits */
+ for(i=0; i<ff_count-3; i+=4)
+ put_bits(&s->pb, 32, 0);
+ put_bits(&s->pb, (ff_count-i)*8, 0);
+ flush_put_bits(&s->pb);
+
+ for(i=size-1; ff_count; i--){
+ int v= buf[i];
+
+ if(v==0xFF){
+//printf("%d %d\n", i, ff_count);
+ buf[i+ff_count]= 0;
+ ff_count--;
+ }
+
+ buf[i+ff_count]= v;
+ }
+}
+
void mjpeg_picture_trailer(MpegEncContext *s)
{
- jflush_put_bits(&s->pb);
+ int pad= (-get_bit_count(&s->pb))&7;
+
+ put_bits(&s->pb, pad,0xFF>>(8-pad));
+ flush_put_bits(&s->pb);
+
+ assert((s->header_bits&7)==0);
+
+ escape_FF(s, s->header_bits>>3);
+
put_marker(&s->pb, EOI);
}
static inline void mjpeg_encode_dc(MpegEncContext *s, int val,
- UINT8 *huff_size, UINT16 *huff_code)
+ uint8_t *huff_size, uint16_t *huff_code)
{
int mant, nbits;
if (val == 0) {
- jput_bits(&s->pb, huff_size[0], huff_code[0]);
+ put_bits(&s->pb, huff_size[0], huff_code[0]);
} else {
mant = val;
if (val < 0) {
mant--;
}
- /* compute the log (XXX: optimize) */
- nbits = 0;
- while (val != 0) {
- val = val >> 1;
- nbits++;
- }
+ nbits= av_log2_16bit(val) + 1;
- jput_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
+ put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
- jput_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
+ put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
}
}
int mant, nbits, code, i, j;
int component, dc, run, last_index, val;
MJpegContext *m = s->mjpeg_ctx;
- UINT8 *huff_size_ac;
- UINT16 *huff_code_ac;
+ uint8_t *huff_size_ac;
+ uint16_t *huff_code_ac;
/* DC coef */
component = (n <= 3 ? 0 : n - 4 + 1);
run++;
} else {
while (run >= 16) {
- jput_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
+ put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
run -= 16;
}
mant = val;
mant--;
}
- /* compute the log (XXX: optimize) */
- nbits = 0;
- while (val != 0) {
- val = val >> 1;
- nbits++;
- }
+ nbits= av_log2(val) + 1;
code = (run << 4) | nbits;
- jput_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
+ put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
- jput_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
+ put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
run = 0;
}
}
/* output EOB only if not already 64 values */
if (last_index < 63 || run != 0)
- jput_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
+ put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
}
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;
+}
+
+#endif //CONFIG_ENCODERS
+
/******************************************/
/* decoding */
-/* compressed picture size */
-#define PICTURE_BUFFER_SIZE 100000
-
#define MAX_COMPONENTS 4
typedef struct MJpegDecodeContext {
int start_code; /* current start code */
int buffer_size;
- UINT8 *buffer;
+ uint8_t *buffer;
- INT16 quant_matrixes[4][64];
+ int16_t quant_matrixes[4][64];
VLC vlcs[2][4];
+ int qscale[4]; ///< quantizer scale calculated from quant_matrixes
int org_width, 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 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;
int h_max, v_max; /* maximum h and v counts */
int quant_index[4]; /* quant table index for each component */
int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */
- UINT8 *current_picture[MAX_COMPONENTS]; /* picture structure */
+ uint8_t *current_picture[MAX_COMPONENTS]; /* picture structure */
int linesize[MAX_COMPONENTS];
+ uint8_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 buggy_avid;
int restart_interval;
int restart_count;
- int interleaved_rows;
- ScanTable scantable;
- void (*idct_put)(UINT8 *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/);
+
+ int buggy_avid;
+ int interlace_polarity;
} MJpegDecodeContext;
static int mjpeg_decode_dht(MJpegDecodeContext *s);
-static void build_vlc(VLC *vlc, const UINT8 *bits_table, const UINT8 *val_table,
+static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
int nb_codes)
{
- UINT8 huff_size[256];
- UINT16 huff_code[256];
+ 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);
- 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);
}
static int mjpeg_decode_init(AVCodecContext *avctx)
s->avctx = avctx;
- /* ugly way to get the idct & scantable */
+ /* ugly way to get the idct & scantable FIXME */
memset(&s2, 0, sizeof(MpegEncContext));
s2.flags= avctx->flags;
s2.avctx= avctx;
if (MPV_common_init(&s2) < 0)
return -1;
s->scantable= s2.intra_scantable;
- s->idct_put= s2.idct_put;
+ s->idct_put= s2.dsp.idct_put;
MPV_common_end(&s2);
s->mpeg_enc_ctx_allocated = 0;
- s->buffer_size = PICTURE_BUFFER_SIZE - 1; /* minus 1 to take into
- account FF 00 case */
+ s->buffer_size = 102400; /* smaller buffer should be enough,
+ but photojpg files could ahive bigger sizes */
s->buffer = av_malloc(s->buffer_size);
+ if (!s->buffer)
+ return -1;
s->start_code = -1;
s->first_picture = 1;
s->org_width = avctx->width;
if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
{
printf("mjpeg: using external huffman table\n");
- init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size);
+ init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
mjpeg_decode_dht(s);
/* should check for error - but dunno */
}
j = s->scantable.permutated[i];
s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
}
+
+ //XXX FIXME finetune, and perhaps add dc too
+ s->qscale[index]= FFMAX(
+ s->quant_matrixes[index][s->scantable.permutated[1]],
+ s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
len -= 65;
}
static int mjpeg_decode_dht(MJpegDecodeContext *s)
{
int len, index, i, class, n, v, code_max;
- UINT8 bits_table[17];
- UINT8 val_table[256];
+ uint8_t bits_table[17];
+ uint8_t val_table[256];
len = get_bits(&s->gb, 16) - 2;
free_vlc(&s->vlcs[class][index]);
dprintf("class=%d index=%d nb_codes=%d\n",
class, index, code_max + 1);
- build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1);
+ if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1) < 0){
+ return -1;
+ }
}
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);
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 */
if (width != s->width || height != s->height) {
for(i=0;i<MAX_COMPONENTS;i++)
av_freep(&s->current_picture[i]);
+
+ av_freep(&s->qscale_table);
+
s->width = width;
s->height = height;
/* test interlaced mode */
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;
}
- 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);
if (s->interlaced)
w *= 2;
s->linesize[i] = w;
- /* memory test is done in mjpeg_decode_sos() */
s->current_picture[i] = av_mallocz(w * h);
+ if (!s->current_picture[i])
+ {
+ dprintf("error: no picture buffers allocated\n");
+ return -1;
+ }
+ }
}
+ s->qscale_table= av_mallocz((s->width+15)/16);
+
s->first_picture = 0;
}
static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
{
- int code, diff;
-#if 0
- code = get_vlc2(&s->gb, s->vlc[0][dc_index].table,
- s->vlc[0][dc_index].bits, 1);
-#else
- code = get_vlc(&s->gb, &s->vlcs[0][dc_index]);
-#endif
+ int code;
+ code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
if (code < 0)
{
dprintf("mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
&s->vlcs[0][dc_index]);
return 0xffff;
}
- if (code == 0) {
- diff = 0;
- } else {
- diff = get_bits(&s->gb, code);
- if ((diff & (1 << (code - 1))) == 0)
- diff = (-1 << code) | (diff + 1);
- }
- return diff;
+
+ if(code)
+ return get_xbits(&s->gb, code);
+ else
+ return 0;
}
/* decode block and dequantize */
static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
int component, int dc_index, int ac_index, int quant_index)
{
- int nbits, code, i, j, level;
- int run, val;
+ int code, i, j, level, val;
VLC *ac_vlc;
- INT16 *quant_matrix;
+ int16_t *quant_matrix;
/* DC coef */
val = mjpeg_decode_dc(s, dc_index);
ac_vlc = &s->vlcs[1][ac_index];
i = 1;
for(;;) {
-#if 0
- code = get_vlc2(&s->gb, s->vlcs[1][ac_index].table,
- s->vlcs[1][ac_index].bits, 2);
-#else
- code = get_vlc(&s->gb, ac_vlc);
-#endif
+ code = get_vlc2(&s->gb, s->vlcs[1][ac_index].table, 9, 2);
+
if (code < 0) {
dprintf("error ac\n");
return -1;
if (code == 0xf0) {
i += 16;
} else {
- run = code >> 4;
- nbits = code & 0xf;
- level = get_bits(&s->gb, nbits);
- if ((level & (1 << (nbits - 1))) == 0)
- level = (-1 << nbits) | (level + 1);
- i += run;
+ level = get_xbits(&s->gb, code & 0xf);
+ i += code >> 4;
if (i >= 64) {
dprintf("error count: %d\n", i);
return -1;
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];
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);
}
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];
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;
}
- for(mb_y = 0; mb_y < mb_height; mb_y++) {
+ 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);
+
+ 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 *ptr;
+ uint8_t *ptr;
int x, y, c;
n = nb_blocks[i];
c = comp_index[i];
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,
}
}
}
- if (s->restart_interval && !--s->restart_count) {
+ /* (< 1350) buggy workaround for Spectralfan.mov, should be fixed */
+ if (s->restart_interval && (s->restart_interval < 1350) &&
+ !--s->restart_count) {
align_get_bits(&s->gb);
skip_bits(&s->gb, 16); /* skip RSTn */
for (j=0; j<nb_components; j++) /* reset dc */
}
}
}
+ }
ret = 0;
the_end:
emms_c();
return 0;
}
-#define FOURCC(a,b,c,d) ((a << 24) | (b << 16) | (c << 8) | d)
-static int mjpeg_decode_app(MJpegDecodeContext *s, int start_code)
+static int mjpeg_decode_app(MJpegDecodeContext *s)
{
int len, id;
return -1;
id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
+ 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 means
- interleaving, but it's always present in AVID files */
- if (id == FOURCC('A','V','I','1'))
+ /* also this fourcc is used by non-avid files too, it holds some
+ informations, but it's always present in AVID creates files */
+ if (id == ff_get_fourcc("AVI1"))
{
/* structure:
4bytes AVI1
4bytes field_size_less_padding
*/
s->buggy_avid = 1;
- if (s->first_picture)
- printf("mjpeg: workarounding buggy AVID\n");
- s->interleaved_rows = get_bits(&s->gb, 8);
+// if (s->first_picture)
+// printf("mjpeg: workarounding buggy AVID\n");
+ s->interlace_polarity = get_bits(&s->gb, 8);
#if 0
skip_bits(&s->gb, 8);
skip_bits(&s->gb, 32);
skip_bits(&s->gb, 32);
len -= 10;
#endif
- if (s->interleaved_rows)
- printf("mjpeg: interleaved rows: %d\n", s->interleaved_rows);
+// if (s->interlace_polarity)
+// printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
goto out;
}
- len -= 2;
+// len -= 2;
- if (id == FOURCC('J','F','I','F'))
+ if (id == ff_get_fourcc("JFIF"))
{
+ int t_w, t_h;
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)
{
- s->avctx->aspect_ratio_info = FF_ASPECT_EXTENDED;
- s->avctx->aspected_width = get_bits(&s->gb, 16);
- s->avctx->aspected_height = get_bits(&s->gb, 16);
+ int x_density, y_density;
+ x_density = get_bits(&s->gb, 16);
+ y_density = get_bits(&s->gb, 16);
+
+ 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);
}
- skip_bits(&s->gb, 8);
- skip_bits(&s->gb, 8);
+
+ t_w = get_bits(&s->gb, 8);
+ t_h = get_bits(&s->gb, 8);
+ if (t_w && t_h)
+ {
+ /* skip thumbnail */
+ if (len-10-(t_w*t_h*3) > 0)
+ len -= t_w*t_h*3;
+ }
+ len -= 10;
+ goto out;
+ }
+
+ if (id == ff_get_fourcc("Adob") && (get_bits(&s->gb, 8) == 'e'))
+ {
+ printf("mjpeg: Adobe header found\n");
+ skip_bits(&s->gb, 16); /* version */
+ skip_bits(&s->gb, 16); /* flags0 */
+ skip_bits(&s->gb, 16); /* flags1 */
+ skip_bits(&s->gb, 8); /* transform */
+ 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 ((start_code == APP1) && (len > (0x28 - 8)))
+ if ((s->start_code == APP1) && (len > (0x28 - 8)))
{
id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
+ id = be2me_32(id);
len -= 4;
- if (id == FOURCC('m','j','p','g')) /* Apple MJPEG-A */
+ if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */
{
#if 0
skip_bits(&s->gb, 32); /* field size */
}
out:
- /* should check for further values.. */
+ /* slow but needed for extreme adobe jpegs */
+ if (len < 0)
+ printf("mjpeg: error, decode_app parser read over the end\n");
+ while(--len > 0)
+ skip_bits(&s->gb, 8);
return 0;
}
-#undef FOURCC
static int mjpeg_decode_com(MJpegDecodeContext *s)
{
- int len, i;
- UINT8 *cbuf;
-
/* XXX: verify len field validity */
- len = get_bits(&s->gb, 16)-2;
- cbuf = av_malloc(len+1);
-
- for (i = 0; i < len; i++)
- cbuf[i] = get_bits(&s->gb, 8);
- if (cbuf[i-1] == '\n')
- cbuf[i-1] = 0;
- else
- cbuf[i] = 0;
-
- printf("mjpeg comment: '%s'\n", cbuf);
-
- /* buggy avid, it puts EOI only at every 10th frame */
- if (!strcmp(cbuf, "AVID"))
- {
- s->buggy_avid = 1;
-// if (s->first_picture)
-// printf("mjpeg: workarounding buggy AVID\n");
+ int len = get_bits(&s->gb, 16);
+ if (len >= 2 && len < 32768) {
+ /* XXX: any better upper bound */
+ uint8_t *cbuf = av_malloc(len - 1);
+ if (cbuf) {
+ int i;
+ for (i = 0; i < len - 2; i++)
+ cbuf[i] = get_bits(&s->gb, 8);
+ if (i > 0 && cbuf[i-1] == '\n')
+ cbuf[i-1] = 0;
+ else
+ cbuf[i] = 0;
+
+ printf("mjpeg comment: '%s'\n", cbuf);
+
+ /* buggy avid, it puts EOI only at every 10th frame */
+ if (!strcmp(cbuf, "AVID"))
+ {
+ s->buggy_avid = 1;
+ // if (s->first_picture)
+ // printf("mjpeg: workarounding buggy AVID\n");
+ }
+
+ av_free(cbuf);
+ }
}
-
- av_free(cbuf);
return 0;
}
/* return the 8 bit start code value and update the search
state. Return -1 if no start code found */
-static int find_marker(UINT8 **pbuf_ptr, UINT8 *buf_end)
+static int find_marker(uint8_t **pbuf_ptr, uint8_t *buf_end)
{
- UINT8 *buf_ptr;
+ uint8_t *buf_ptr;
unsigned int v, v2;
int val;
#ifdef DEBUG
static int mjpeg_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- UINT8 *buf, int buf_size)
+ uint8_t *buf, int buf_size)
{
MJpegDecodeContext *s = avctx->priv_data;
- UINT8 *buf_end, *buf_ptr;
+ uint8_t *buf_end, *buf_ptr;
int i, start_code;
- AVPicture *picture = data;
+ AVFrame *picture = data;
*data_size = 0;
av_free(s->buffer);
s->buffer_size = buf_end-buf_ptr;
s->buffer = av_malloc(s->buffer_size);
+ dprintf("buffer too small, expanding to %d bytes\n",
+ s->buffer_size);
}
/* unescape buffer of SOS */
if (start_code == SOS)
{
- UINT8 *src = buf_ptr;
- UINT8 *dst = s->buffer;
+ uint8_t *src = buf_ptr;
+ uint8_t *dst = s->buffer;
while (src<buf_end)
{
- UINT8 x = *(src++);
-
+ uint8_t x = *(src++);
+
*(dst++) = x;
if (x == 0xff)
{
+ while(*src == 0xff) src++;
+
x = *(src++);
if (x >= 0xd0 && x <= 0xd7)
*(dst++) = x;
break;
}
}
- init_get_bits(&s->gb, s->buffer, dst - s->buffer);
+ init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
+
+ dprintf("escaping removed %d bytes\n",
+ (buf_end - buf_ptr) - (dst - s->buffer));
}
else
- init_get_bits(&s->gb, buf_ptr, buf_end - buf_ptr);
+ 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) {
} else if (s->first_picture) {
/* APP fields */
if (start_code >= 0xe0 && start_code <= 0xef)
- mjpeg_decode_app(s, start_code);
+ mjpeg_decode_app(s);
/* Comment */
else if (start_code == COM)
mjpeg_decode_com(s);
mjpeg_decode_dqt(s);
break;
case DHT:
- mjpeg_decode_dht(s);
+ if(mjpeg_decode_dht(s) < 0){
+ fprintf(stderr, "huffman table decode error\n");
+ return -1;
+ }
break;
case SOF0:
- mjpeg_decode_sof0(s);
+ 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:
+ if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
+ break;
eoi_parser:
{
- int l;
if (s->interlaced) {
s->bottom_field ^= 1;
/* if not bottom field, do not output image yet */
}
for(i=0;i<3;i++) {
picture->data[i] = s->current_picture[i];
-#if 1
- l = s->linesize[i];
- if (s->interlaced)
- l >>= 1;
- picture->linesize[i] = l;
-#else
picture->linesize[i] = (s->interlaced) ?
s->linesize[i] >> 1 : s->linesize[i];
-#endif
}
- *data_size = sizeof(AVPicture);
+ *data_size = sizeof(AVFrame);
avctx->height = s->height;
if (s->interlaced)
avctx->height *= 2;
/* 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;
avctx->pix_fmt = PIX_FMT_YUV420P;
break;
}
- /* dummy quality */
- /* XXX: infer it with matrix */
- avctx->quality = 3;
+
+ if(!s->lossless){
+ picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
+ picture->qstride= 0;
+ 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", (int)picture->quality);
+ }
+
goto the_end;
}
break;
break;
case SOF1:
case SOF2:
- case SOF3:
case SOF5:
case SOF6:
case SOF7:
}
}
the_end:
-
dprintf("mjpeg decode frame unused %d bytes\n", buf_end - buf_ptr);
// return buf_end - buf_ptr;
return buf_ptr - buf;
}
+static int mjpegb_decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ uint8_t *buf, int buf_size)
+{
+ 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;
+
+ buf_ptr = buf;
+ buf_end = buf + buf_size;
+
+read_header:
+ /* reset on every SOI */
+ s->restart_interval = 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")))
+ {
+ dprintf("not mjpeg-b (bad fourcc)\n");
+ return 0;
+ }
+
+ field_size = get_bits(&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);
+ dprintf("second field offs: 0x%x\n", second_field_offs);
+ if (second_field_offs)
+ s->interlaced = 1;
+
+ dqt_offs = get_bits(&hgb, 32);
+ dprintf("dqt offs: 0x%x\n", dqt_offs);
+ if (dqt_offs)
+ {
+ init_get_bits(&s->gb, buf+dqt_offs, (buf_end - (buf+dqt_offs))*8);
+ s->start_code = DQT;
+ mjpeg_decode_dqt(s);
+ }
+
+ dht_offs = get_bits(&hgb, 32);
+ dprintf("dht offs: 0x%x\n", dht_offs);
+ if (dht_offs)
+ {
+ init_get_bits(&s->gb, buf+dht_offs, (buf_end - (buf+dht_offs))*8);
+ s->start_code = DHT;
+ mjpeg_decode_dht(s);
+ }
+
+ sof_offs = get_bits(&hgb, 32);
+ dprintf("sof offs: 0x%x\n", sof_offs);
+ if (sof_offs)
+ {
+ init_get_bits(&s->gb, buf+sof_offs, (buf_end - (buf+sof_offs))*8);
+ s->start_code = SOF0;
+ if (mjpeg_decode_sof(s) < 0)
+ return -1;
+ }
+
+ sos_offs = get_bits(&hgb, 32);
+ dprintf("sos offs: 0x%x\n", sos_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->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 */
+ if (s->bottom_field && second_field_offs)
+ {
+ buf_ptr = buf + second_field_offs;
+ second_field_offs = 0;
+ goto read_header;
+ }
+ }
+
+ //XXX FIXME factorize, this looks very similar to the EOI code
+
+ for(i=0;i<3;i++) {
+ picture->data[i] = s->current_picture[i];
+ picture->linesize[i] = (s->interlaced) ?
+ s->linesize[i] >> 1 : s->linesize[i];
+ }
+ *data_size = sizeof(AVFrame);
+ avctx->height = s->height;
+ if (s->interlaced)
+ avctx->height *= 2;
+ avctx->width = s->width;
+ /* XXX: not complete test ! */
+ switch((s->h_count[0] << 4) | s->v_count[0]) {
+ case 0x11:
+ avctx->pix_fmt = PIX_FMT_YUV444P;
+ break;
+ case 0x21:
+ avctx->pix_fmt = PIX_FMT_YUV422P;
+ break;
+ default:
+ case 0x22:
+ avctx->pix_fmt = PIX_FMT_YUV420P;
+ break;
+ }
+
+ if(!s->lossless){
+ picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
+ picture->qstride= 0;
+ 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);
+ }
+
+ return buf_ptr - buf;
+}
+
+
static int mjpeg_decode_end(AVCodecContext *avctx)
{
MJpegDecodeContext *s = avctx->priv_data;
int i, j;
av_free(s->buffer);
+ av_free(s->qscale_table);
for(i=0;i<MAX_COMPONENTS;i++)
av_free(s->current_picture[i]);
for(i=0;i<2;i++) {
0,
NULL
};
+
+AVCodec mjpegb_decoder = {
+ "mjpegb",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_MJPEGB,
+ sizeof(MJpegDecodeContext),
+ mjpeg_decode_init,
+ NULL,
+ mjpeg_decode_end,
+ mjpegb_decode_frame,
+ 0,
+ NULL
+};
+
+#ifdef CONFIG_ENCODERS
+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,
+};
+#endif
projects / ffmpeg / blobdiff