static int h261_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
const uint8_t *buf, int buf_size)
{
H261Context *h= avctx->priv_data;
MpegEncContext *s = &h->s;
int ret;
AVFrame *pict = data;
#ifdef DEBUG
av_log(avctx, AV_LOG_DEBUG, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
av_log(avctx, AV_LOG_DEBUG, "bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
#endif
s->flags= avctx->flags;
s->flags2= avctx->flags2;
h->gob_start_code_skipped=0;
retry:
init_get_bits(&s->gb, buf, buf_size*8);
if(!s->context_initialized){
if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
return -1;
}
//we need to set current_picture_ptr before reading the header, otherwise we cannot store anyting im there
if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){
int i= ff_find_unused_picture(s, 0);
s->current_picture_ptr= &s->picture[i];
}
ret = h261_decode_picture_header(h);
/* skip if the header was thrashed */
if (ret < 0){
av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
return -1;
}
if (s->width != avctx->coded_width || s->height != avctx->coded_height){
ParseContext pc= s->parse_context; //FIXME move this demuxing hack to libavformat
s->parse_context.buffer=0;
MPV_common_end(s);
s->parse_context= pc;
}
if (!s->context_initialized) {
avcodec_set_dimensions(avctx, s->width, s->height);
goto retry;
}
// for hurry_up==5
s->current_picture.pict_type= s->pict_type;
s->current_picture.key_frame= s->pict_type == FF_I_TYPE;
/* skip everything if we are in a hurry>=5 */
if(avctx->hurry_up>=5) return get_consumed_bytes(s, buf_size);
if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==FF_B_TYPE)
||(avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=FF_I_TYPE)
|| avctx->skip_frame >= AVDISCARD_ALL)
return get_consumed_bytes(s, buf_size);
if(MPV_frame_start(s, avctx) < 0)
return -1;
ff_er_frame_start(s);
/* decode each macroblock */
s->mb_x=0;
s->mb_y=0;
while(h->gob_number < (s->mb_height==18 ? 12 : 5)){
if(ff_h261_resync(h)<0)
break;
h261_decode_gob(h);
}
MPV_frame_end(s);
assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
assert(s->current_picture.pict_type == s->pict_type);
*pict= *(AVFrame*)s->current_picture_ptr;
ff_print_debug_info(s, pict);
*data_size = sizeof(AVFrame);
return get_consumed_bytes(s, buf_size);
}
static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
{
SgiState *s = avctx->priv_data;
AVFrame *picture = data;
AVFrame *p = &s->picture;
unsigned int dimension, rle;
int ret = 0;
uint8_t *out_buf, *out_end;
bytestream2_init(&s->g, avpkt->data, avpkt->size);
if (bytestream2_get_bytes_left(&s->g) < SGI_HEADER_SIZE) {
av_log(avctx, AV_LOG_ERROR, "buf_size too small (%d)\n", avpkt->size);
return AVERROR_INVALIDDATA;
}
/* Test for SGI magic. */
if (bytestream2_get_be16(&s->g) != SGI_MAGIC) {
av_log(avctx, AV_LOG_ERROR, "bad magic number\n");
return AVERROR_INVALIDDATA;
}
rle = bytestream2_get_byte(&s->g);
s->bytes_per_channel = bytestream2_get_byte(&s->g);
dimension = bytestream2_get_be16(&s->g);
s->width = bytestream2_get_be16(&s->g);
s->height = bytestream2_get_be16(&s->g);
s->depth = bytestream2_get_be16(&s->g);
if (s->bytes_per_channel != 1 && (s->bytes_per_channel != 2 || rle)) {
av_log(avctx, AV_LOG_ERROR, "wrong channel number\n");
return -1;
}
/* Check for supported image dimensions. */
if (dimension != 2 && dimension != 3) {
av_log(avctx, AV_LOG_ERROR, "wrong dimension number\n");
return -1;
}
if (s->depth == SGI_GRAYSCALE) {
avctx->pix_fmt = s->bytes_per_channel == 2 ? PIX_FMT_GRAY16BE : PIX_FMT_GRAY8;
} else if (s->depth == SGI_RGB) {
avctx->pix_fmt = s->bytes_per_channel == 2 ? PIX_FMT_RGB48BE : PIX_FMT_RGB24;
} else if (s->depth == SGI_RGBA) {
avctx->pix_fmt = s->bytes_per_channel == 2 ? PIX_FMT_RGBA64BE : PIX_FMT_RGBA;
} else {
av_log(avctx, AV_LOG_ERROR, "wrong picture format\n");
return -1;
}
if (av_image_check_size(s->width, s->height, 0, avctx))
return -1;
avcodec_set_dimensions(avctx, s->width, s->height);
if (p->data[0])
avctx->release_buffer(avctx, p);
p->reference = 0;
if (avctx->get_buffer(avctx, p) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed.\n");
return -1;
}
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
out_buf = p->data[0];
out_end = out_buf + p->linesize[0] * s->height;
s->linesize = p->linesize[0];
/* Skip header. */
bytestream2_seek(&s->g, SGI_HEADER_SIZE, SEEK_SET);
if (rle) {
ret = read_rle_sgi(out_end, s);
} else {
ret = read_uncompressed_sgi(out_buf, out_end, s);
}
if (ret == 0) {
*picture = s->picture;
*data_size = sizeof(AVPicture);
return avpkt->size;
} else {
return ret;
}
}
/**
* Execute ANSI escape code
* @return 0 on success, negative on error
*/
static int execute_code(AVCodecContext * avctx, int c)
{
AnsiContext *s = avctx->priv_data;
int ret, i, width, height;
switch(c) {
case 'A': //Cursor Up
s->y = FFMAX(s->y - (s->nb_args > 0 ? s->args[0]*s->font_height : s->font_height), 0);
break;
case 'B': //Cursor Down
s->y = FFMIN(s->y + (s->nb_args > 0 ? s->args[0]*s->font_height : s->font_height), avctx->height - s->font_height);
break;
case 'C': //Cursor Right
s->x = FFMIN(s->x + (s->nb_args > 0 ? s->args[0]*FONT_WIDTH : FONT_WIDTH), avctx->width - FONT_WIDTH);
break;
case 'D': //Cursor Left
s->x = FFMAX(s->x - (s->nb_args > 0 ? s->args[0]*FONT_WIDTH : FONT_WIDTH), 0);
break;
case 'H': //Cursor Position
case 'f': //Horizontal and Vertical Position
s->y = s->nb_args > 0 ? av_clip((s->args[0] - 1)*s->font_height, 0, avctx->height - s->font_height) : 0;
s->x = s->nb_args > 1 ? av_clip((s->args[1] - 1)*FONT_WIDTH, 0, avctx->width - FONT_WIDTH) : 0;
break;
case 'h': //set creen mode
case 'l': //reset screen mode
if (s->nb_args < 2)
s->args[0] = DEFAULT_SCREEN_MODE;
width = avctx->width;
height = avctx->height;
switch(s->args[0]) {
case 0: case 1: case 4: case 5: case 13: case 19: //320x200 (25 rows)
s->font = avpriv_cga_font;
s->font_height = 8;
width = 40<<3;
height = 25<<3;
break;
case 2: case 3: //640x400 (25 rows)
s->font = avpriv_vga16_font;
s->font_height = 16;
width = 80<<3;
height = 25<<4;
break;
case 6: case 14: //640x200 (25 rows)
s->font = avpriv_cga_font;
s->font_height = 8;
width = 80<<3;
height = 25<<3;
break;
case 7: //set line wrapping
break;
case 15: case 16: //640x350 (43 rows)
s->font = avpriv_cga_font;
s->font_height = 8;
width = 80<<3;
height = 43<<3;
break;
case 17: case 18: //640x480 (60 rows)
s->font = avpriv_cga_font;
s->font_height = 8;
width = 80<<3;
height = 60<<4;
break;
default:
avpriv_request_sample(avctx, "Unsupported screen mode");
}
s->x = av_clip(s->x, 0, width - FONT_WIDTH);
s->y = av_clip(s->y, 0, height - s->font_height);
if (width != avctx->width || height != avctx->height) {
av_frame_unref(s->frame);
avcodec_set_dimensions(avctx, width, height);
if ((ret = ff_get_buffer(avctx, s->frame,
AV_GET_BUFFER_FLAG_REF)) < 0)
return ret;
s->frame->pict_type = AV_PICTURE_TYPE_I;
s->frame->palette_has_changed = 1;
set_palette((uint32_t *)s->frame->data[1]);
erase_screen(avctx);
} else if (c == 'l') {
erase_screen(avctx);
}
break;
case 'J': //Erase in Page
switch (s->args[0]) {
case 0:
erase_line(avctx, s->x, avctx->width - s->x);
if (s->y < avctx->height - s->font_height)
memset(s->frame->data[0] + (s->y + s->font_height)*s->frame->linesize[0],
DEFAULT_BG_COLOR, (avctx->height - s->y - s->font_height)*s->frame->linesize[0]);
break;
case 1:
erase_line(avctx, 0, s->x);
if (s->y > 0)
memset(s->frame->data[0], DEFAULT_BG_COLOR, s->y * s->frame->linesize[0]);
break;
case 2:
erase_screen(avctx);
}
break;
case 'K': //Erase in Line
switch(s->args[0]) {
case 0:
erase_line(avctx, s->x, avctx->width - s->x);
break;
case 1:
erase_line(avctx, 0, s->x);
break;
case 2:
erase_line(avctx, 0, avctx->width);
}
break;
case 'm': //Select Graphics Rendition
if (s->nb_args == 0) {
s->nb_args = 1;
s->args[0] = 0;
}
for (i = 0; i < FFMIN(s->nb_args, MAX_NB_ARGS); i++) {
int m = s->args[i];
if (m == 0) {
s->attributes = 0;
s->fg = DEFAULT_FG_COLOR;
s->bg = DEFAULT_BG_COLOR;
} else if (m == 1 || m == 2 || m == 4 || m == 5 || m == 7 || m == 8) {
s->attributes |= 1 << (m - 1);
} else if (m >= 30 && m <= 37) {
s->fg = ansi_to_cga[m - 30];
} else if (m == 38 && i + 2 < FFMIN(s->nb_args, MAX_NB_ARGS) && s->args[i + 1] == 5 && s->args[i + 2] < 256) {
int index = s->args[i + 2];
s->fg = index < 16 ? ansi_to_cga[index] : index;
i += 2;
} else if (m == 39) {
s->fg = ansi_to_cga[DEFAULT_FG_COLOR];
} else if (m >= 40 && m <= 47) {
s->bg = ansi_to_cga[m - 40];
} else if (m == 48 && i + 2 < FFMIN(s->nb_args, MAX_NB_ARGS) && s->args[i + 1] == 5 && s->args[i + 2] < 256) {
int index = s->args[i + 2];
s->bg = index < 16 ? ansi_to_cga[index] : index;
i += 2;
} else if (m == 49) {
s->fg = ansi_to_cga[DEFAULT_BG_COLOR];
} else {
avpriv_request_sample(avctx, "Unsupported rendition parameter");
}
}
break;
case 'n': //Device Status Report
case 'R': //report current line and column
/* ignore */
break;
case 's': //Save Cursor Position
s->sx = s->x;
s->sy = s->y;
break;
case 'u': //Restore Cursor Position
s->x = av_clip(s->sx, 0, avctx->width - FONT_WIDTH);
s->y = av_clip(s->sy, 0, avctx->height - s->font_height);
break;
default:
avpriv_request_sample(avctx, "Unknown escape code");
break;
}
s->x = av_clip(s->x, 0, avctx->width - FONT_WIDTH);
s->y = av_clip(s->y, 0, avctx->height - s->font_height);
return 0;
}
static int rv20_decode_picture_header(MpegEncContext *s)
{
int seq, mb_pos, i;
#if 0
GetBitContext gb= s->gb;
for(i=0; i<64; i++){
av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&gb));
if(i%4==3) av_log(s->avctx, AV_LOG_DEBUG, " ");
}
av_log(s->avctx, AV_LOG_DEBUG, "\n");
#endif
#if 0
av_log(s->avctx, AV_LOG_DEBUG, "%3dx%03d/%02Xx%02X ", s->width, s->height, s->width/4, s->height/4);
for(i=0; i<s->avctx->extradata_size; i++){
av_log(s->avctx, AV_LOG_DEBUG, "%02X ", ((uint8_t*)s->avctx->extradata)[i]);
if(i%4==3) av_log(s->avctx, AV_LOG_DEBUG, " ");
}
av_log(s->avctx, AV_LOG_DEBUG, "\n");
#endif
if(s->avctx->sub_id == 0x30202002 || s->avctx->sub_id == 0x30203002){
if (get_bits(&s->gb, 3)){
av_log(s->avctx, AV_LOG_ERROR, "unknown triplet set\n");
return -1;
}
}
i= get_bits(&s->gb, 2);
switch(i){
case 0: s->pict_type= FF_I_TYPE; break;
case 1: s->pict_type= FF_I_TYPE; break; //hmm ...
case 2: s->pict_type= FF_P_TYPE; break;
case 3: s->pict_type= FF_B_TYPE; break;
default:
av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
return -1;
}
if(s->last_picture_ptr==NULL && s->pict_type==FF_B_TYPE){
av_log(s->avctx, AV_LOG_ERROR, "early B pix\n");
return -1;
}
if (get_bits1(&s->gb)){
av_log(s->avctx, AV_LOG_ERROR, "unknown bit set\n");
return -1;
}
s->qscale = get_bits(&s->gb, 5);
if(s->qscale==0){
av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
return -1;
}
if(s->avctx->sub_id == 0x30203002){
if (get_bits1(&s->gb)){
av_log(s->avctx, AV_LOG_ERROR, "unknown bit2 set\n");
return -1;
}
}
if(s->avctx->has_b_frames){
int f, new_w, new_h;
int v= s->avctx->extradata_size >= 4 ? 7&((uint8_t*)s->avctx->extradata)[1] : 0;
if (get_bits1(&s->gb)){
av_log(s->avctx, AV_LOG_ERROR, "unknown bit3 set\n");
}
seq= get_bits(&s->gb, 13)<<2;
f= get_bits(&s->gb, av_log2(v)+1);
if(f){
new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
}else{
new_w= s->orig_width ;
new_h= s->orig_height;
}
if(new_w != s->width || new_h != s->height){
av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
if (avcodec_check_dimensions(s->avctx, new_w, new_h) < 0)
return -1;
MPV_common_end(s);
avcodec_set_dimensions(s->avctx, new_w, new_h);
s->width = new_w;
s->height = new_h;
if (MPV_common_init(s) < 0)
return -1;
}
if(s->avctx->debug & FF_DEBUG_PICT_INFO){
av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, v);
}
}else{
seq= get_bits(&s->gb, 8)*128;
}
// if(s->avctx->sub_id <= 0x20201002){ //0x20201002 definitely needs this
mb_pos= ff_h263_decode_mba(s);
/* }else{
mb_pos= get_bits(&s->gb, av_log2(s->mb_num-1)+1);
s->mb_x= mb_pos % s->mb_width;
s->mb_y= mb_pos / s->mb_width;
}*/
//av_log(s->avctx, AV_LOG_DEBUG, "%d\n", seq);
seq |= s->time &~0x7FFF;
if(seq - s->time > 0x4000) seq -= 0x8000;
if(seq - s->time < -0x4000) seq += 0x8000;
if(seq != s->time){
if(s->pict_type!=FF_B_TYPE){
s->time= seq;
s->pp_time= s->time - s->last_non_b_time;
s->last_non_b_time= s->time;
}else{
s->time= seq;
s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
return FRAME_SKIPPED;
}
ff_mpeg4_init_direct_mv(s);
}
}
// printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);
/*for(i=0; i<32; i++){
av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
}
av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
s->no_rounding= get_bits1(&s->gb);
s->f_code = 1;
s->unrestricted_mv = 1;
s->h263_aic= s->pict_type == FF_I_TYPE;
// s->alt_inter_vlc=1;
// s->obmc=1;
// s->umvplus=1;
s->modified_quant=1;
if(!s->avctx->lowres)
s->loop_filter=1;
if(s->avctx->debug & FF_DEBUG_PICT_INFO){
av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
}
assert(s->pict_type != FF_B_TYPE || !s->low_delay);
return s->mb_width*s->mb_height - mb_pos;
}
/* Returns the number of bytes consumed from the bytestream. Returns -1 if
* there was an error while decoding the header */
static int truemotion1_decode_header(TrueMotion1Context *s)
{
int i;
int width_shift = 0;
int new_pix_fmt;
struct frame_header header;
uint8_t header_buffer[128] = { 0 }; /* logical maximum size of the header */
const uint8_t *sel_vector_table;
header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
if (s->buf[0] < 0x10 || header.header_size >= s->size)
{
av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]);
return -1;
}
/* unscramble the header bytes with a XOR operation */
for (i = 1; i < header.header_size; i++)
header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
header.compression = header_buffer[0];
header.deltaset = header_buffer[1];
header.vectable = header_buffer[2];
header.ysize = AV_RL16(&header_buffer[3]);
header.xsize = AV_RL16(&header_buffer[5]);
header.checksum = AV_RL16(&header_buffer[7]);
header.version = header_buffer[9];
header.header_type = header_buffer[10];
header.flags = header_buffer[11];
header.control = header_buffer[12];
/* Version 2 */
if (header.version >= 2)
{
if (header.header_type > 3)
{
av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type);
return -1;
} else if ((header.header_type == 2) || (header.header_type == 3)) {
s->flags = header.flags;
if (!(s->flags & FLAG_INTERFRAME))
s->flags |= FLAG_KEYFRAME;
} else
s->flags = FLAG_KEYFRAME;
} else /* Version 1 */
s->flags = FLAG_KEYFRAME;
if (s->flags & FLAG_SPRITE) {
av_log_ask_for_sample(s->avctx, "SPRITE frame found.\n");
/* FIXME header.width, height, xoffset and yoffset aren't initialized */
return AVERROR_PATCHWELCOME;
} else {
s->w = header.xsize;
s->h = header.ysize;
if (header.header_type < 2) {
if ((s->w < 213) && (s->h >= 176))
{
s->flags |= FLAG_INTERPOLATED;
av_log_ask_for_sample(s->avctx, "INTERPOLATION selected.\n");
}
}
}
if (header.compression >= 17) {
av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression);
return -1;
}
if ((header.deltaset != s->last_deltaset) ||
(header.vectable != s->last_vectable))
select_delta_tables(s, header.deltaset);
if ((header.compression & 1) && header.header_type)
sel_vector_table = pc_tbl2;
else {
if (header.vectable > 0 && header.vectable < 4)
sel_vector_table = tables[header.vectable - 1];
else {
av_log(s->avctx, AV_LOG_ERROR, "invalid vector table id (%d)\n", header.vectable);
return -1;
}
}
if (compression_types[header.compression].algorithm == ALGO_RGB24H) {
new_pix_fmt = AV_PIX_FMT_RGB32;
width_shift = 1;
} else
new_pix_fmt = AV_PIX_FMT_RGB555; // RGB565 is supported as well
s->w >>= width_shift;
if (av_image_check_size(s->w, s->h, 0, s->avctx) < 0)
return -1;
if (s->w != s->avctx->width || s->h != s->avctx->height ||
new_pix_fmt != s->avctx->pix_fmt) {
if (s->frame.data[0])
s->avctx->release_buffer(s->avctx, &s->frame);
s->avctx->sample_aspect_ratio = (AVRational){ 1 << width_shift, 1 };
s->avctx->pix_fmt = new_pix_fmt;
avcodec_set_dimensions(s->avctx, s->w, s->h);
av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
}
/* There is 1 change bit per 4 pixels, so each change byte represents
* 32 pixels; divide width by 4 to obtain the number of change bits and
* then round up to the nearest byte. */
s->mb_change_bits_row_size = ((s->avctx->width >> (2 - width_shift)) + 7) >> 3;
if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
{
if (compression_types[header.compression].algorithm == ALGO_RGB24H)
gen_vector_table24(s, sel_vector_table);
else
if (s->avctx->pix_fmt == AV_PIX_FMT_RGB555)
gen_vector_table15(s, sel_vector_table);
else
gen_vector_table16(s, sel_vector_table);
}
/* set up pointers to the other key data chunks */
s->mb_change_bits = s->buf + header.header_size;
if (s->flags & FLAG_KEYFRAME) {
/* no change bits specified for a keyframe; only index bytes */
s->index_stream = s->mb_change_bits;
} else {
/* one change bit per 4x4 block */
s->index_stream = s->mb_change_bits +
(s->mb_change_bits_row_size * (s->avctx->height >> 2));
}
s->index_stream_size = s->size - (s->index_stream - s->buf);
s->last_deltaset = header.deltaset;
s->last_vectable = header.vectable;
s->compression = header.compression;
s->block_width = compression_types[header.compression].block_width;
s->block_height = compression_types[header.compression].block_height;
s->block_type = compression_types[header.compression].block_type;
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_INFO, "tables: %d / %d c:%d %dx%d t:%d %s%s%s%s\n",
s->last_deltaset, s->last_vectable, s->compression, s->block_width,
s->block_height, s->block_type,
s->flags & FLAG_KEYFRAME ? " KEY" : "",
s->flags & FLAG_INTERFRAME ? " INTER" : "",
s->flags & FLAG_SPRITE ? " SPRITE" : "",
s->flags & FLAG_INTERPOLATED ? " INTERPOL" : "");
return header.header_size;
}
static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
{
PicContext *s = avctx->priv_data;
int buf_size = avpkt->size;
const uint8_t *buf = avpkt->data;
const uint8_t *buf_end = avpkt->data + buf_size;
uint32_t *palette;
int bits_per_plane, bpp, etype, esize, npal;
int i, x, y, plane;
if (buf_size < 11)
return AVERROR_INVALIDDATA;
if (bytestream_get_le16(&buf) != 0x1234)
return AVERROR_INVALIDDATA;
s->width = bytestream_get_le16(&buf);
s->height = bytestream_get_le16(&buf);
buf += 4;
bits_per_plane = *buf & 0xF;
s->nb_planes = (*buf++ >> 4) + 1;
bpp = s->nb_planes ? bits_per_plane*s->nb_planes : bits_per_plane;
if (bits_per_plane > 8 || bpp < 1 || bpp > 32) {
av_log_ask_for_sample(s, "unsupported bit depth\n");
return AVERROR_INVALIDDATA;
}
if (*buf == 0xFF) {
buf += 2;
etype = bytestream_get_le16(&buf);
esize = bytestream_get_le16(&buf);
if (buf_end - buf < esize)
return AVERROR_INVALIDDATA;
} else {
etype = -1;
esize = 0;
}
avctx->pix_fmt = PIX_FMT_PAL8;
if (s->width != avctx->width && s->height != avctx->height) {
if (av_image_check_size(s->width, s->height, 0, avctx) < 0)
return -1;
avcodec_set_dimensions(avctx, s->width, s->height);
if (s->frame.data[0])
avctx->release_buffer(avctx, &s->frame);
}
if (avctx->get_buffer(avctx, &s->frame) < 0){
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
memset(s->frame.data[0], 0, s->height * s->frame.linesize[0]);
s->frame.pict_type = AV_PICTURE_TYPE_I;
s->frame.palette_has_changed = 1;
palette = (uint32_t*)s->frame.data[1];
if (etype == 1 && esize > 1 && *buf < 6) {
int idx = *buf;
npal = 4;
for (i = 0; i < npal; i++)
palette[i] = ff_cga_palette[ cga_mode45_index[idx][i] ];
} else if (etype == 2) {
npal = FFMIN(esize, 16);
for (i = 0; i < npal; i++)
palette[i] = ff_cga_palette[ FFMIN(buf[i], 16)];
} else if (etype == 3) {
npal = FFMIN(esize, 16);
for (i = 0; i < npal; i++)
palette[i] = ff_ega_palette[ FFMIN(buf[i], 63)];
} else if (etype == 4 || etype == 5) {
npal = FFMIN(esize / 3, 256);
for (i = 0; i < npal; i++)
palette[i] = AV_RB24(buf + i*3) << 2;
} else {
if (bpp == 1) {
npal = 2;
palette[0] = 0x000000;
palette[1] = 0xFFFFFF;
} else if (bpp == 2) {
npal = 4;
for (i = 0; i < npal; i++)
palette[i] = ff_cga_palette[ cga_mode45_index[0][i] ];
} else {
npal = 16;
memcpy(palette, ff_cga_palette, npal * 4);
}
}
// fill remaining palette entries
memset(palette + npal, 0, AVPALETTE_SIZE - npal * 4);
buf += esize;
x = 0;
y = s->height - 1;
plane = 0;
if (bytestream_get_le16(&buf)) {
while (buf_end - buf >= 6) {
const uint8_t *buf_pend = buf + FFMIN(AV_RL16(buf), buf_end - buf);
//ignore uncompressed block size reported at buf[2]
int marker = buf[4];
buf += 5;
while (plane < s->nb_planes && buf_pend - buf >= 1) {
int run = 1;
int val = *buf++;
if (val == marker) {
run = *buf++;
if (run == 0)
run = bytestream_get_le16(&buf);
val = *buf++;
}
if (buf > buf_end)
break;
if (bits_per_plane == 8) {
picmemset_8bpp(s, val, run, &x, &y);
if (y < 0)
break;
} else {
picmemset(s, val, run, &x, &y, &plane, bits_per_plane);
}
}
}
} else {
av_log_ask_for_sample(s, "uncompressed image\n");
return buf_size;
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
return buf_size;
}
