int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s){
char buf1[32], tuple_type[32];
int h, w, depth, maxval;
pnm_get(s, buf1, sizeof(buf1));
if (!strcmp(buf1, "P4")) {
avctx->pix_fmt = PIX_FMT_MONOWHITE;
} else if (!strcmp(buf1, "P5")) {
if (avctx->codec_id == CODEC_ID_PGMYUV)
avctx->pix_fmt = PIX_FMT_YUV420P;
else
avctx->pix_fmt = PIX_FMT_GRAY8;
} else if (!strcmp(buf1, "P6")) {
avctx->pix_fmt = PIX_FMT_RGB24;
} else if (!strcmp(buf1, "P7")) {
w = -1;
h = -1;
maxval = -1;
depth = -1;
tuple_type[0] = '\0';
for(;;) {
pnm_get(s, buf1, sizeof(buf1));
if (!strcmp(buf1, "WIDTH")) {
pnm_get(s, buf1, sizeof(buf1));
w = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "HEIGHT")) {
pnm_get(s, buf1, sizeof(buf1));
h = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "DEPTH")) {
pnm_get(s, buf1, sizeof(buf1));
depth = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "MAXVAL")) {
pnm_get(s, buf1, sizeof(buf1));
maxval = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "TUPLETYPE")) {
pnm_get(s, tuple_type, sizeof(tuple_type));
} else if (!strcmp(buf1, "ENDHDR")) {
break;
} else {
return -1;
}
}
/* check that all tags are present */
if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0' || avcodec_check_dimensions(avctx, w, h))
return -1;
avctx->width = w;
avctx->height = h;
if (depth == 1) {
if (maxval == 1)
avctx->pix_fmt = PIX_FMT_MONOWHITE;
else
avctx->pix_fmt = PIX_FMT_GRAY8;
} else if (depth == 3) {
if (maxval < 256) {
avctx->pix_fmt = PIX_FMT_RGB24;
} else {
av_log(avctx, AV_LOG_ERROR, "16-bit components are only supported for grayscale\n");
avctx->pix_fmt = PIX_FMT_NONE;
return -1;
}
} else if (depth == 4) {
avctx->pix_fmt = PIX_FMT_RGB32;
} else {
return -1;
}
return 0;
} else {
return -1;
}
pnm_get(s, buf1, sizeof(buf1));
avctx->width = atoi(buf1);
if (avctx->width <= 0)
return -1;
pnm_get(s, buf1, sizeof(buf1));
avctx->height = atoi(buf1);
if(avcodec_check_dimensions(avctx, avctx->width, avctx->height))
return -1;
if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
pnm_get(s, buf1, sizeof(buf1));
s->maxval = atoi(buf1);
if (s->maxval >= 256) {
if (avctx->pix_fmt == PIX_FMT_GRAY8) {
avctx->pix_fmt = PIX_FMT_GRAY16BE;
if (s->maxval != 65535)
avctx->pix_fmt = PIX_FMT_GRAY16;
} if (avctx->pix_fmt == PIX_FMT_RGB24) {
if (s->maxval > 255)
avctx->pix_fmt = PIX_FMT_RGB48BE;
} else {
av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format\n");
avctx->pix_fmt = PIX_FMT_NONE;
return -1;
}
}
}
/* more check if YUV420 */
if (avctx->pix_fmt == PIX_FMT_YUV420P) {
if ((avctx->width & 1) != 0)
return -1;
h = (avctx->height * 2);
if ((h % 3) != 0)
return -1;
h /= 3;
avctx->height = h;
}
return 0;
}
int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
{
char buf1[32], tuple_type[32];
int h, w, depth, maxval;
pnm_get(s, buf1, sizeof(buf1));
s->type= buf1[1]-'0';
if(buf1[0] != 'P')
return AVERROR_INVALIDDATA;
if (s->type==1 || s->type==4) {
avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
} else if (s->type==2 || s->type==5) {
if (avctx->codec_id == AV_CODEC_ID_PGMYUV)
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
else
avctx->pix_fmt = AV_PIX_FMT_GRAY8;
} else if (s->type==3 || s->type==6) {
avctx->pix_fmt = AV_PIX_FMT_RGB24;
} else if (s->type==7) {
w = -1;
h = -1;
maxval = -1;
depth = -1;
tuple_type[0] = '\0';
for (;;) {
pnm_get(s, buf1, sizeof(buf1));
if (!strcmp(buf1, "WIDTH")) {
pnm_get(s, buf1, sizeof(buf1));
w = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "HEIGHT")) {
pnm_get(s, buf1, sizeof(buf1));
h = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "DEPTH")) {
pnm_get(s, buf1, sizeof(buf1));
depth = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "MAXVAL")) {
pnm_get(s, buf1, sizeof(buf1));
maxval = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "TUPLTYPE") ||
/* libavcodec used to write invalid files */
!strcmp(buf1, "TUPLETYPE")) {
pnm_get(s, tuple_type, sizeof(tuple_type));
} else if (!strcmp(buf1, "ENDHDR")) {
break;
} else {
return AVERROR_INVALIDDATA;
}
}
/* check that all tags are present */
if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0' || av_image_check_size(w, h, 0, avctx) || s->bytestream >= s->bytestream_end)
return AVERROR_INVALIDDATA;
avctx->width = w;
avctx->height = h;
s->maxval = maxval;
if (depth == 1) {
if (maxval == 1) {
avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
} else if (maxval == 255) {
avctx->pix_fmt = AV_PIX_FMT_GRAY8;
} else {
avctx->pix_fmt = AV_PIX_FMT_GRAY16BE;
}
} else if (depth == 2) {
if (maxval == 255)
avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
} else if (depth == 3) {
if (maxval < 256) {
avctx->pix_fmt = AV_PIX_FMT_RGB24;
} else {
avctx->pix_fmt = AV_PIX_FMT_RGB48BE;
}
} else if (depth == 4) {
if (maxval < 256) {
avctx->pix_fmt = AV_PIX_FMT_RGBA;
} else {
avctx->pix_fmt = AV_PIX_FMT_RGBA64BE;
}
} else {
return AVERROR_INVALIDDATA;
}
return 0;
} else {
return AVERROR_INVALIDDATA;
}
pnm_get(s, buf1, sizeof(buf1));
w = atoi(buf1);
pnm_get(s, buf1, sizeof(buf1));
h = atoi(buf1);
if(w <= 0 || h <= 0 || av_image_check_size(w, h, 0, avctx) || s->bytestream >= s->bytestream_end)
return AVERROR_INVALIDDATA;
avctx->width = w;
avctx->height = h;
if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE && avctx->pix_fmt != AV_PIX_FMT_MONOBLACK) {
pnm_get(s, buf1, sizeof(buf1));
s->maxval = atoi(buf1);
if (s->maxval <= 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid maxval: %d\n", s->maxval);
s->maxval = 255;
}
if (s->maxval >= 256) {
if (avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
avctx->pix_fmt = AV_PIX_FMT_GRAY16BE;
} else if (avctx->pix_fmt == AV_PIX_FMT_RGB24) {
avctx->pix_fmt = AV_PIX_FMT_RGB48BE;
} else if (avctx->pix_fmt == AV_PIX_FMT_YUV420P && s->maxval < 65536) {
if (s->maxval < 512)
avctx->pix_fmt = AV_PIX_FMT_YUV420P9BE;
else if (s->maxval < 1024)
avctx->pix_fmt = AV_PIX_FMT_YUV420P10BE;
else
avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
} else {
av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format\n");
avctx->pix_fmt = AV_PIX_FMT_NONE;
return AVERROR_INVALIDDATA;
}
}
} else
s->maxval=1;
/* more check if YUV420 */
if (av_pix_fmt_desc_get(avctx->pix_fmt)->flags & PIX_FMT_PLANAR) {
if ((avctx->width & 1) != 0)
return AVERROR_INVALIDDATA;
h = (avctx->height * 2);
if ((h % 3) != 0)
return AVERROR_INVALIDDATA;
h /= 3;
avctx->height = h;
}
return 0;
}
static int pnm_decode_header(AVCodecContext *avctx, PNMContext * const s){
char buf1[32], tuple_type[32];
int h, w, depth, maxval;
pnm_get(s, buf1, sizeof(buf1));
if (!strcmp(buf1, "P4")) {
avctx->pix_fmt = PIX_FMT_MONOWHITE;
} else if (!strcmp(buf1, "P5")) {
if (avctx->codec_id == CODEC_ID_PGMYUV)
avctx->pix_fmt = PIX_FMT_YUV420P;
else
avctx->pix_fmt = PIX_FMT_GRAY8;
} else if (!strcmp(buf1, "P6")) {
avctx->pix_fmt = PIX_FMT_RGB24;
} else if (!strcmp(buf1, "P7")) {
w = -1;
h = -1;
maxval = -1;
depth = -1;
tuple_type[0] = '\0';
for(;;) {
pnm_get(s, buf1, sizeof(buf1));
if (!strcmp(buf1, "WIDTH")) {
pnm_get(s, buf1, sizeof(buf1));
w = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "HEIGHT")) {
pnm_get(s, buf1, sizeof(buf1));
h = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "DEPTH")) {
pnm_get(s, buf1, sizeof(buf1));
depth = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "MAXVAL")) {
pnm_get(s, buf1, sizeof(buf1));
maxval = strtol(buf1, NULL, 10);
} else if (!strcmp(buf1, "TUPLETYPE")) {
pnm_get(s, tuple_type, sizeof(tuple_type));
} else if (!strcmp(buf1, "ENDHDR")) {
break;
} else {
return -1;
}
}
/* check that all tags are present */
if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0' || avcodec_check_dimensions(avctx, w, h))
return -1;
avctx->width = w;
avctx->height = h;
if (depth == 1) {
if (maxval == 1)
avctx->pix_fmt = PIX_FMT_MONOWHITE;
else
avctx->pix_fmt = PIX_FMT_GRAY8;
} else if (depth == 3) {
avctx->pix_fmt = PIX_FMT_RGB24;
} else if (depth == 4) {
avctx->pix_fmt = PIX_FMT_RGB32;
} else {
return -1;
}
return 0;
} else {
return -1;
}
pnm_get(s, buf1, sizeof(buf1));
avctx->width = atoi(buf1);
if (avctx->width <= 0)
return -1;
pnm_get(s, buf1, sizeof(buf1));
avctx->height = atoi(buf1);
if(avcodec_check_dimensions(avctx, avctx->width, avctx->height))
return -1;
if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
pnm_get(s, buf1, sizeof(buf1));
if(atoi(buf1) == 65535 && avctx->pix_fmt == PIX_FMT_GRAY8)
avctx->pix_fmt = PIX_FMT_GRAY16BE;
}
/* more check if YUV420 */
if (avctx->pix_fmt == PIX_FMT_YUV420P) {
if ((avctx->width & 1) != 0)
return -1;
h = (avctx->height * 2);
if ((h % 3) != 0)
return -1;
h /= 3;
avctx->height = h;
}
return 0;
}
static int pnm_read1(ByteIOContext *f,
int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque,
int allow_yuv)
{
int i, n, linesize, h;
char buf1[32];
unsigned char *ptr;
AVImageInfo info1, *info = &info1;
int ret;
pnm_get(f, buf1, sizeof(buf1));
if (!strcmp(buf1, "P4")) {
info->pix_fmt = PIX_FMT_MONOWHITE;
} else if (!strcmp(buf1, "P5")) {
if (allow_yuv)
info->pix_fmt = PIX_FMT_YUV420P;
else
info->pix_fmt = PIX_FMT_GRAY8;
} else if (!strcmp(buf1, "P6")) {
info->pix_fmt = PIX_FMT_RGB24;
} else {
return AVERROR_INVALIDDATA;
}
pnm_get(f, buf1, sizeof(buf1));
info->width = atoi(buf1);
if (info->width <= 0)
return AVERROR_INVALIDDATA;
pnm_get(f, buf1, sizeof(buf1));
info->height = atoi(buf1);
if (info->height <= 0)
return AVERROR_INVALIDDATA;
if (info->pix_fmt != PIX_FMT_MONOWHITE) {
pnm_get(f, buf1, sizeof(buf1));
}
/* more check if YUV420 */
if (info->pix_fmt == PIX_FMT_YUV420P) {
if ((info->width & 1) != 0)
return AVERROR_INVALIDDATA;
h = (info->height * 2);
if ((h % 3) != 0)
return AVERROR_INVALIDDATA;
h /= 3;
info->height = h;
}
ret = alloc_cb(opaque, info);
if (ret)
return ret;
switch(info->pix_fmt) {
default:
return AVERROR_INVALIDDATA;
case PIX_FMT_RGB24:
n = info->width * 3;
goto do_read;
case PIX_FMT_GRAY8:
n = info->width;
goto do_read;
case PIX_FMT_MONOWHITE:
n = (info->width + 7) >> 3;
do_read:
ptr = info->pict.data[0];
linesize = info->pict.linesize[0];
for(i = 0; i < info->height; i++) {
get_buffer(f, ptr, n);
ptr += linesize;
}
break;
case PIX_FMT_YUV420P:
{
unsigned char *ptr1, *ptr2;
n = info->width;
ptr = info->pict.data[0];
linesize = info->pict.linesize[0];
for(i = 0; i < info->height; i++) {
get_buffer(f, ptr, n);
ptr += linesize;
}
ptr1 = info->pict.data[1];
ptr2 = info->pict.data[2];
n >>= 1;
h = info->height >> 1;
for(i = 0; i < h; i++) {
get_buffer(f, ptr1, n);
get_buffer(f, ptr2, n);
ptr1 += info->pict.linesize[1];
ptr2 += info->pict.linesize[2];
}
}
break;
}
return 0;
}
