* PNM image format
* Copyright (c) 2002, 2003 Fabrice Bellard.
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
+#include "mpegvideo.h" //only for ParseContext
typedef struct PNMContext {
uint8_t *bytestream;
AVFrame picture;
} PNMContext;
-static inline int pnm_space(int c)
+static inline int pnm_space(int c)
{
return (c == ' ' || c == '\n' || c == '\r' || c == '\t');
}
-static void pnm_get(PNMContext *sc, char *str, int buf_size)
+static void pnm_get(PNMContext *sc, char *str, int buf_size)
{
char *s;
int c;
-
+
/* skip spaces and comments */
for(;;) {
c = *sc->bytestream++;
break;
}
}
-
+
s = str;
while (sc->bytestream < sc->bytestream_end && !pnm_space(c)) {
if ((s - str) < buf_size - 1)
return 0;
}
-static int pnm_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
-{
- PNMContext * const s = avctx->priv_data;
- AVFrame *picture = data;
- AVFrame * const p= (AVFrame*)&s->picture;
- int i, n, linesize, h;
- char buf1[32];
- unsigned char *ptr;
-
- /* special case for last picture */
- if (buf_size == 0) {
- return 0;
- }
-
- s->bytestream_start=
- s->bytestream= buf;
- s->bytestream_end= buf + buf_size;
+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)
+ 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_RGBA32;
+ } else {
+ return -1;
+ }
+ return 0;
} else {
return -1;
}
return -1;
pnm_get(s, buf1, sizeof(buf1));
avctx->height = atoi(buf1);
- if (avctx->height <= 0)
+ if(avcodec_check_dimensions(avctx, avctx->width, avctx->height))
return -1;
if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
pnm_get(s, buf1, sizeof(buf1));
h /= 3;
avctx->height = h;
}
-
+ return 0;
+}
+
+static int pnm_decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ uint8_t *buf, int buf_size)
+{
+ PNMContext * const s = avctx->priv_data;
+ AVFrame *picture = data;
+ AVFrame * const p= (AVFrame*)&s->picture;
+ int i, n, linesize, h;
+ unsigned char *ptr;
+
+ s->bytestream_start=
+ s->bytestream= buf;
+ s->bytestream_end= buf + buf_size;
+
+ if(pnm_decode_header(avctx, s) < 0)
+ return -1;
+
if(p->data[0])
avctx->release_buffer(avctx, p);
}
p->pict_type= FF_I_TYPE;
p->key_frame= 1;
-
+
switch(avctx->pix_fmt) {
default:
return -1;
n = avctx->width;
goto do_read;
case PIX_FMT_MONOWHITE:
+ case PIX_FMT_MONOBLACK:
n = (avctx->width + 7) >> 3;
do_read:
ptr = p->data[0];
linesize = p->linesize[0];
+ if(s->bytestream + n*avctx->height > s->bytestream_end)
+ return -1;
for(i = 0; i < avctx->height; i++) {
memcpy(ptr, s->bytestream, n);
s->bytestream += n;
n = avctx->width;
ptr = p->data[0];
linesize = p->linesize[0];
+ if(s->bytestream + n*avctx->height*3/2 > s->bytestream_end)
+ return -1;
for(i = 0; i < avctx->height; i++) {
memcpy(ptr, s->bytestream, n);
s->bytestream += n;
}
}
break;
+ case PIX_FMT_RGBA32:
+ ptr = p->data[0];
+ linesize = p->linesize[0];
+ if(s->bytestream + avctx->width*avctx->height*4 > s->bytestream_end)
+ return -1;
+ for(i = 0; i < avctx->height; i++) {
+ int j, r, g, b, a;
+
+ for(j = 0;j < avctx->width; j++) {
+ r = *s->bytestream++;
+ g = *s->bytestream++;
+ b = *s->bytestream++;
+ a = *s->bytestream++;
+ ((uint32_t *)ptr)[j] = (a << 24) | (r << 16) | (g << 8) | b;
+ }
+ ptr += linesize;
+ }
+ break;
}
*picture= *(AVFrame*)&s->picture;
*data_size = sizeof(AVPicture);
int i, h, h1, c, n, linesize;
uint8_t *ptr, *ptr1, *ptr2;
+ if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200){
+ av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
+ return -1;
+ }
+
*p = *pict;
p->pict_type= FF_I_TYPE;
p->key_frame= 1;
-
+
s->bytestream_start=
s->bytestream= outbuf;
s->bytestream_end= outbuf+buf_size;
default:
return -1;
}
- snprintf(s->bytestream, s->bytestream_end - s->bytestream,
+ snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"P%c\n%d %d\n",
c, avctx->width, h1);
s->bytestream += strlen(s->bytestream);
if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
- snprintf(s->bytestream, s->bytestream_end - s->bytestream,
+ snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"%d\n", 255);
s->bytestream += strlen(s->bytestream);
}
s->bytestream += n;
ptr += linesize;
}
-
+
if (avctx->pix_fmt == PIX_FMT_YUV420P) {
h >>= 1;
n >>= 1;
return s->bytestream - s->bytestream_start;
}
-static int pam_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
-{
- PNMContext * const s = avctx->priv_data;
- AVFrame *picture = data;
- AVFrame * const p= (AVFrame*)&s->picture;
- int i, n, linesize, h, w, depth, maxval;
- char buf1[32], tuple_type[32];
- unsigned char *ptr;
-
- /* special case for last picture */
- if (buf_size == 0) {
- return 0;
- }
-
- s->bytestream_start=
- s->bytestream= buf;
- s->bytestream_end= buf + buf_size;
-
- pnm_get(s, buf1, sizeof(buf1));
- if (strcmp(buf1, "P7") != 0)
- return -1;
- 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')
- 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_RGBA32;
- } else {
- return -1;
- }
-
- 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= FF_I_TYPE;
- p->key_frame= 1;
-
- switch(avctx->pix_fmt) {
- default:
- return -1;
- case PIX_FMT_RGB24:
- n = avctx->width * 3;
- goto do_read;
- case PIX_FMT_GRAY8:
- n = avctx->width;
- goto do_read;
- case PIX_FMT_MONOWHITE:
- n = (avctx->width + 7) >> 3;
- do_read:
- ptr = p->data[0];
- linesize = p->linesize[0];
- for(i = 0; i < avctx->height; i++) {
- memcpy(ptr, s->bytestream, n);
- s->bytestream += n;
- ptr += linesize;
- }
- break;
- case PIX_FMT_RGBA32:
- ptr = p->data[0];
- linesize = p->linesize[0];
- for(i = 0; i < avctx->height; i++) {
- int j, r, g, b, a;
-
- for(j = 0;j < w; j++) {
- r = *s->bytestream++;
- g = *s->bytestream++;
- b = *s->bytestream++;
- a = *s->bytestream++;
- ((uint32_t *)ptr)[j] = (a << 24) | (r << 16) | (g << 8) | b;
- }
- ptr += linesize;
- }
- break;
- }
- *picture= *(AVFrame*)&s->picture;
- *data_size = sizeof(AVPicture);
-
- return s->bytestream - s->bytestream_start;
-}
-
static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){
PNMContext *s = avctx->priv_data;
AVFrame *pict = data;
const char *tuple_type;
uint8_t *ptr;
+ if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200){
+ av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
+ return -1;
+ }
+
*p = *pict;
p->pict_type= FF_I_TYPE;
p->key_frame= 1;
-
+
s->bytestream_start=
s->bytestream= outbuf;
s->bytestream_end= outbuf+buf_size;
default:
return -1;
}
- snprintf(s->bytestream, s->bytestream_end - s->bytestream,
+ snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n",
w, h, depth, maxval, tuple_type);
s->bytestream += strlen(s->bytestream);
-
+
ptr = p->data[0];
linesize = p->linesize[0];
-
+
if (avctx->pix_fmt == PIX_FMT_RGBA32) {
int j;
unsigned int v;
}
#endif
+#ifdef CONFIG_PNM_PARSER
+static int pnm_parse(AVCodecParserContext *s,
+ AVCodecContext *avctx,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size)
+{
+ ParseContext *pc = s->priv_data;
+ PNMContext pnmctx;
+ int next;
+
+ for(; pc->overread>0; pc->overread--){
+ pc->buffer[pc->index++]= pc->buffer[pc->overread_index++];
+ }
+retry:
+ if(pc->index){
+ pnmctx.bytestream_start=
+ pnmctx.bytestream= pc->buffer;
+ pnmctx.bytestream_end= pc->buffer + pc->index;
+ }else{
+ pnmctx.bytestream_start=
+ pnmctx.bytestream= (uint8_t *) buf; /* casts avoid warnings */
+ pnmctx.bytestream_end= (uint8_t *) buf + buf_size;
+ }
+ if(pnm_decode_header(avctx, &pnmctx) < 0){
+ if(pnmctx.bytestream < pnmctx.bytestream_end){
+ if(pc->index){
+ pc->index=0;
+ }else{
+ buf++;
+ buf_size--;
+ }
+ goto retry;
+ }
+#if 0
+ if(pc->index && pc->index*2 + FF_INPUT_BUFFER_PADDING_SIZE < pc->buffer_size && buf_size > pc->index){
+ memcpy(pc->buffer + pc->index, buf, pc->index);
+ pc->index += pc->index;
+ buf += pc->index;
+ buf_size -= pc->index;
+ goto retry;
+ }
+#endif
+ next= END_NOT_FOUND;
+ }else{
+ next= pnmctx.bytestream - pnmctx.bytestream_start
+ + avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
+ if(pnmctx.bytestream_start!=buf)
+ next-= pc->index;
+ if(next > buf_size)
+ next= END_NOT_FOUND;
+ }
+
+ 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;
+}
+
+AVCodecParser pnm_parser = {
+ { CODEC_ID_PGM, CODEC_ID_PGMYUV, CODEC_ID_PPM, CODEC_ID_PBM, CODEC_ID_PAM},
+ sizeof(ParseContext),
+ NULL,
+ pnm_parse,
+ ff_parse_close,
+};
+#endif /* CONFIG_PNM_PARSER */
+
+#ifdef CONFIG_PGM_ENCODER
AVCodec pgm_encoder = {
"pgm",
CODEC_TYPE_VIDEO,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_GRAY8, -1},
+ .pix_fmts= (enum PixelFormat[]){PIX_FMT_GRAY8, -1},
};
+#endif // CONFIG_PGM_ENCODER
+#ifdef CONFIG_PGMYUV_ENCODER
AVCodec pgmyuv_encoder = {
"pgmyuv",
CODEC_TYPE_VIDEO,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
+ .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
};
+#endif // CONFIG_PGMYUV_ENCODER
+#ifdef CONFIG_PPM_ENCODER
AVCodec ppm_encoder = {
"ppm",
CODEC_TYPE_VIDEO,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, -1},
+ .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, -1},
};
+#endif // CONFIG_PPM_ENCODER
+#ifdef CONFIG_PBM_ENCODER
AVCodec pbm_encoder = {
"pbm",
CODEC_TYPE_VIDEO,
pnm_encode_frame,
NULL, //encode_end,
pnm_decode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_MONOWHITE, -1},
+ .pix_fmts= (enum PixelFormat[]){PIX_FMT_MONOWHITE, -1},
};
+#endif // CONFIG_PBM_ENCODER
+#ifdef CONFIG_PAM_ENCODER
AVCodec pam_encoder = {
"pam",
CODEC_TYPE_VIDEO,
common_init,
pam_encode_frame,
NULL, //encode_end,
- pam_decode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGBA32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, -1},
+ pnm_decode_frame,
+ .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGBA32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, -1},
};
+#endif // CONFIG_PAM_ENCODER
projects / ffmpeg / blobdiff