/*
* MJPEG decoder
- * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2000, 2001 Fabrice Bellard
* Copyright (c) 2003 Alex Beregszaszi
* Copyright (c) 2003-2004 Michael Niedermayer
*
*/
/**
- * @file mjpegdec.c
+ * @file libavcodec/mjpegdec.c
* MJPEG decoder.
*/
static void build_basic_mjpeg_vlc(MJpegDecodeContext * s) {
build_vlc(&s->vlcs[0][0], ff_mjpeg_bits_dc_luminance,
- ff_mjpeg_val_dc_luminance, 12, 0, 0);
+ ff_mjpeg_val_dc, 12, 0, 0);
build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
- ff_mjpeg_val_dc_chrominance, 12, 0, 0);
+ ff_mjpeg_val_dc, 12, 0, 0);
build_vlc(&s->vlcs[1][0], ff_mjpeg_bits_ac_luminance,
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);
}
-int ff_mjpeg_decode_init(AVCodecContext *avctx)
+av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
{
MJpegDecodeContext *s = avctx->priv_data;
s->start_code = -1;
s->first_picture = 1;
s->org_height = avctx->coded_height;
+ avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
build_basic_mjpeg_vlc(s);
return 0;
/* XXX: not complete test ! */
- pix_fmt_id = (s->h_count[0] << 20) | (s->v_count[0] << 16) |
- (s->h_count[1] << 12) | (s->v_count[1] << 8) |
- (s->h_count[2] << 4) | s->v_count[2];
+ pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
+ (s->h_count[1] << 20) | (s->v_count[1] << 16) |
+ (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))
+ pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
+ if(!(pix_fmt_id & 0x01010101))
+ pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
+
switch(pix_fmt_id){
- case 0x222222:
- case 0x111111:
+ case 0x11111100:
if(s->rgb){
s->avctx->pix_fmt = PIX_FMT_RGB32;
- }else if(s->nb_components==3)
+ }else
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
- else
- s->avctx->pix_fmt = PIX_FMT_GRAY8;
+ assert(s->nb_components==3);
break;
- case 0x121111:
+ case 0x11000000:
+ s->avctx->pix_fmt = PIX_FMT_GRAY8;
+ break;
+ case 0x12111100:
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV440P : PIX_FMT_YUVJ440P;
break;
- case 0x211111:
- case 0x221212:
+ case 0x21111100:
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
break;
- default:
- case 0x221111:
+ case 0x22111100:
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
break;
+ default:
+ av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
+ return -1;
}
if(s->ls){
if(s->nb_components > 1)
av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
- s->picture.pict_type= I_TYPE;
+ s->picture.pict_type= FF_I_TYPE;
s->picture.key_frame= 1;
for(i=0; i<3; i++){
/* totally blank picture as progressive JPEG will only add details to it */
if(s->progressive){
- memset(s->picture.data[0], 0, s->picture.linesize[0] * s->height);
- memset(s->picture.data[1], 0, s->picture.linesize[1] * s->height >> (s->v_max - s->v_count[1]));
- memset(s->picture.data[2], 0, s->picture.linesize[2] * s->height >> (s->v_max - s->v_count[2]));
+ int bw = (width + s->h_max*8-1) / (s->h_max*8);
+ int bh = (height + s->v_max*8-1) / (s->v_max*8);
+ for(i=0; i<s->nb_components; i++) {
+ int size = bw * bh * s->h_count[i] * s->v_count[i];
+ av_freep(&s->blocks[i]);
+ av_freep(&s->last_nnz[i]);
+ s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
+ s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
+ s->block_stride[i] = bw * s->h_count[i];
+ }
+ memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
}
return 0;
}
return 0;
}
+static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block, int component,
+ int dc_index, int16_t *quant_matrix, int Al)
+{
+ int val;
+ s->dsp.clear_block(block);
+ val = mjpeg_decode_dc(s, dc_index);
+ if (val == 0xffff) {
+ av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
+ return -1;
+ }
+ val = (val * quant_matrix[0] << Al) + s->last_dc[component];
+ s->last_dc[component] = val;
+ block[0] = val;
+ return 0;
+}
+
/* decode block and dequantize - progressive JPEG version */
-static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
- int component, int dc_index, int ac_index, int16_t *quant_matrix,
- int ss, int se, int Ah, int Al, int *EOBRUN)
+static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
+ int ac_index, int16_t *quant_matrix,
+ int ss, int se, int Al, int *EOBRUN)
{
int code, i, j, level, val, run;
- /* DC coef */
- if(!ss){
- val = mjpeg_decode_dc(s, dc_index);
- if (val == 0xffff) {
- av_log(s->avctx, AV_LOG_ERROR, "error dc\n");
- return -1;
- }
- val = (val * quant_matrix[0] << Al) + s->last_dc[component];
- }else
- val = 0;
- s->last_dc[component] = val;
- block[0] = val;
- if(!se) return 0;
- /* AC coefs */
if(*EOBRUN){
(*EOBRUN)--;
return 0;
}
}
CLOSE_READER(re, &s->gb)}
+ if(i > *last_nnz)
+ *last_nnz = i;
+ return 0;
+}
+
+#define REFINE_BIT(j) {\
+ UPDATE_CACHE(re, &s->gb);\
+ sign = block[j]>>15;\
+ block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\
+ LAST_SKIP_BITS(re, &s->gb, 1);\
+}
+
+#define ZERO_RUN \
+for(;;i++) {\
+ if(i > last) {\
+ i += run;\
+ if(i > se) {\
+ av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\
+ return -1;\
+ }\
+ break;\
+ }\
+ j = s->scantable.permutated[i];\
+ if(block[j])\
+ REFINE_BIT(j)\
+ else if(run-- == 0)\
+ break;\
+}
+
+/* decode block and dequantize - progressive JPEG refinement pass */
+static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
+ int ac_index, int16_t *quant_matrix,
+ int ss, int se, int Al, int *EOBRUN)
+{
+ int code, i=ss, j, sign, val, run;
+ int last = FFMIN(se, *last_nnz);
+
+ OPEN_READER(re, &s->gb);
+ if(*EOBRUN)
+ (*EOBRUN)--;
+ 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;
+ if(code & 0xF) {
+ run = ((unsigned) code) >> 4;
+ UPDATE_CACHE(re, &s->gb);
+ val = SHOW_UBITS(re, &s->gb, 1);
+ LAST_SKIP_BITS(re, &s->gb, 1);
+ ZERO_RUN;
+ j = s->scantable.permutated[i];
+ val--;
+ block[j] = ((quant_matrix[j]^val)-val) << Al;
+ if(i == se) {
+ if(i > *last_nnz)
+ *last_nnz = i;
+ CLOSE_READER(re, &s->gb)
+ return 0;
+ }
+ }else{
+ run = ((unsigned) code) >> 4;
+ if(run == 0xF){
+ ZERO_RUN;
+ }else{
+ val = run;
+ run = (1 << run);
+ if(val) {
+ UPDATE_CACHE(re, &s->gb);
+ run += SHOW_UBITS(re, &s->gb, val);
+ LAST_SKIP_BITS(re, &s->gb, val);
+ }
+ *EOBRUN = run - 1;
+ break;
+ }
+ }
+ }
+
+ if(i > *last_nnz)
+ *last_nnz = i;
+ }
+
+ for(;i<=last;i++) {
+ j = s->scantable.permutated[i];
+ if(block[j])
+ REFINE_BIT(j)
+ }
+ CLOSE_READER(re, &s->gb);
return 0;
}
+#undef REFINE_BIT
+#undef ZERO_RUN
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
int i, mb_x, mb_y;
return 0;
}
-static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int ss, int se, int Ah, int Al){
+static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, int Al){
int i, mb_x, mb_y;
- int EOBRUN = 0;
+ uint8_t* data[MAX_COMPONENTS];
+ int linesize[MAX_COMPONENTS];
+
+ 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) {
+ //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;
+ }
+ }
- if(Ah) return 0; /* TODO decode refinement planes too */
for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
if (s->restart_interval && !s->restart_count)
x = 0;
y = 0;
for(j=0;j<n;j++) {
- memset(s->block, 0, sizeof(s->block));
- if (!s->progressive && decode_block(s, s->block, i,
+ ptr = data[c] +
+ (((linesize[c] * (v * mb_y + y) * 8) +
+ (h * mb_x + x) * 8) >> s->avctx->lowres);
+ if(s->interlaced && s->bottom_field)
+ ptr += linesize[c] >> 1;
+ if(!s->progressive) {
+ s->dsp.clear_block(s->block);
+ if(decode_block(s, s->block, i,
s->dc_index[i], s->ac_index[i],
s->quant_matrixes[ s->quant_index[c] ]) < 0) {
- av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
- return -1;
- }
- if (s->progressive && decode_block_progressive(s, s->block, i,
- s->dc_index[i], s->ac_index[i],
- s->quant_matrixes[ s->quant_index[c] ], ss, se, Ah, Al, &EOBRUN) < 0) {
- av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
- return -1;
+ av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
+ return -1;
+ }
+ s->dsp.idct_put(ptr, linesize[c], s->block);
+ } else {
+ int block_idx = s->block_stride[c] * (v * mb_y + y) + (h * mb_x + x);
+ DCTELEM *block = s->blocks[c][block_idx];
+ if(Ah)
+ block[0] += get_bits1(&s->gb) * s->quant_matrixes[ s->quant_index[c] ][0] << Al;
+ else if(decode_dc_progressive(s, block, i, s->dc_index[i], s->quant_matrixes[ s->quant_index[c] ], Al) < 0) {
+ av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
+ return -1;
+ }
}
// av_log(s->avctx, AV_LOG_DEBUG, "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->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);
- if(!s->progressive)
- s->dsp.idct_put(ptr, s->linesize[c], s->block);
- else
- s->dsp.idct_add(ptr, s->linesize[c], s->block);
if (++x == h) {
x = 0;
y++;
return 0;
}
+static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int se, int Ah, int Al){
+ int mb_x, mb_y;
+ int EOBRUN = 0;
+ int c = s->comp_index[0];
+ uint8_t* data = s->picture.data[c];
+ int linesize = s->linesize[c];
+ int last_scan = 0;
+ int16_t *quant_matrix = s->quant_matrixes[ s->quant_index[c] ];
+
+ if(!Al) {
+ s->coefs_finished[c] |= (1LL<<(se+1))-(1LL<<ss);
+ last_scan = !~s->coefs_finished[c];
+ }
+
+ if(s->interlaced && s->bottom_field)
+ data += linesize >> 1;
+
+ for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
+ uint8_t *ptr = data + (mb_y*linesize*8 >> s->avctx->lowres);
+ int block_idx = mb_y * s->block_stride[c];
+ DCTELEM (*block)[64] = &s->blocks[c][block_idx];
+ uint8_t *last_nnz = &s->last_nnz[c][block_idx];
+ for(mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
+ int ret;
+ if(Ah)
+ ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
+ quant_matrix, ss, se, Al, &EOBRUN);
+ else
+ ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
+ quant_matrix, ss, se, Al, &EOBRUN);
+ if(ret < 0) {
+ av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
+ return -1;
+ }
+ if(last_scan) {
+ s->dsp.idct_put(ptr, linesize, *block);
+ ptr += 8 >> s->avctx->lowres;
+ }
+ }
+ }
+ return 0;
+}
+
int ff_mjpeg_decode_sos(MJpegDecodeContext *s)
{
int len, nb_components, i, h, v, predictor, point_transform;
- int vmax, hmax, index, id;
+ int index, id;
const int block_size= s->lossless ? 1 : 8;
int ilv, prev_shift;
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
return -1;
}
- vmax = 0;
- hmax = 0;
for(i=0;i<nb_components;i++) {
id = get_bits(&s->gb, 8) - 1;
av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
skip_bits(&s->gb, 8);
if(s->lossless){
- if(ENABLE_JPEGLS_DECODER && s->ls){
+ if(CONFIG_JPEGLS_DECODER && s->ls){
// for(){
// reset_ls_coding_parameters(s, 0);
- ff_jpegls_decode_picture(s, predictor, point_transform, ilv);
+ if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
+ return -1;
}else{
if(s->rgb){
if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
}
}
}else{
- if(mjpeg_decode_scan(s, nb_components, predictor, ilv, prev_shift, point_transform) < 0)
- return -1;
+ if(s->progressive && predictor) {
+ if(mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift, point_transform) < 0)
+ return -1;
+ } else {
+ if(mjpeg_decode_scan(s, nb_components, prev_shift, point_transform) < 0)
+ return -1;
+ }
}
emms_c();
return 0;
/* 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 */
- if (id == ff_get_fourcc("AVI1"))
+ if (id == AV_RL32("AVI1"))
{
/* structure:
4bytes AVI1
// len -= 2;
- if (id == ff_get_fourcc("JFIF"))
+ if (id == AV_RL32("JFIF"))
{
int t_w, t_h, v1, v2;
skip_bits(&s->gb, 8); /* the trailing zero-byte */
goto out;
}
- if (id == ff_get_fourcc("Adob") && (get_bits(&s->gb, 8) == 'e'))
+ if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e'))
{
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
goto out;
}
- if (id == ff_get_fourcc("LJIF")){
+ if (id == AV_RL32("LJIF")){
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 ? */
id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
id = be2me_32(id);
len -= 4;
- if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */
+ if (id == AV_RL32("mjpg")) /* Apple MJPEG-A */
{
#if 0
skip_bits(&s->gb, 32); /* field size */
/* return the 8 bit start code value and update the search
state. Return -1 if no start code found */
-static int find_marker(uint8_t **pbuf_ptr, uint8_t *buf_end)
+static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
{
- uint8_t *buf_ptr;
+ const uint8_t *buf_ptr;
unsigned int v, v2;
int val;
#ifdef DEBUG
int ff_mjpeg_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
MJpegDecodeContext *s = avctx->priv_data;
- uint8_t *buf_end, *buf_ptr;
+ const uint8_t *buf_end, *buf_ptr;
int start_code;
AVFrame *picture = data;
/* unescape buffer of SOS, use special treatment for JPEG-LS */
if (start_code == SOS && !s->ls)
{
- uint8_t *src = buf_ptr;
+ const uint8_t *src = buf_ptr;
uint8_t *dst = s->buffer;
while (src<buf_end)
(buf_end - buf_ptr) - (dst - s->buffer));
}
else if(start_code == SOS && s->ls){
- uint8_t *src = buf_ptr;
+ const uint8_t *src = buf_ptr;
uint8_t *dst = s->buffer;
int bit_count = 0;
int t = 0, b = 0;
return -1;
break;
case LSE:
- if (!ENABLE_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
+ if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
return -1;
break;
case EOI:
*data_size = sizeof(AVFrame);
if(!s->lossless){
- picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
+ picture->quality= FFMAX3(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);
return buf_ptr - buf;
}
-int ff_mjpeg_decode_end(AVCodecContext *avctx)
+av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
{
MJpegDecodeContext *s = avctx->priv_data;
int i, j;
for(j=0;j<4;j++)
free_vlc(&s->vlcs[i][j]);
}
+ for(i=0; i<MAX_COMPONENTS; i++) {
+ av_freep(&s->blocks[i]);
+ av_freep(&s->last_nnz[i]);
+ }
return 0;
}
ff_mjpeg_decode_end,
ff_mjpeg_decode_frame,
CODEC_CAP_DR1,
- NULL
+ NULL,
+ .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
};
AVCodec thp_decoder = {
ff_mjpeg_decode_end,
ff_mjpeg_decode_frame,
CODEC_CAP_DR1,
- NULL
+ NULL,
+ .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
};
projects / frescor / ffmpeg.git / blobdiff