/*
* PNM image format
- * Copyright (c) 2002, 2003 Fabrice Bellard.
+ * Copyright (c) 2002, 2003 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
-#include "parser.h" //for ParseContext
-
-typedef struct PNMContext {
- uint8_t *bytestream;
- uint8_t *bytestream_start;
- uint8_t *bytestream_end;
- AVFrame picture;
- int maxval; ///< maximum value of a pixel
-} PNMContext;
+#include "pnm.h"
static inline int pnm_space(int c)
{
- return (c == ' ' || c == '\n' || c == '\r' || c == '\t');
+ return c == ' ' || c == '\n' || c == '\r' || c == '\t';
}
static void pnm_get(PNMContext *sc, char *str, int buf_size)
*s = '\0';
}
-static int common_init(AVCodecContext *avctx){
- PNMContext *s = avctx->priv_data;
-
- avcodec_get_frame_defaults((AVFrame*)&s->picture);
- avctx->coded_frame= (AVFrame*)&s->picture;
-
- return 0;
-}
-
-static int pnm_decode_header(AVCodecContext *avctx, PNMContext * const s){
+int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s){
char buf1[32], tuple_type[32];
int h, w, depth, maxval;
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 {
if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
pnm_get(s, buf1, sizeof(buf1));
s->maxval = atoi(buf1);
- if(s->maxval >= 256 && avctx->pix_fmt == PIX_FMT_GRAY8) {
- avctx->pix_fmt = PIX_FMT_GRAY16BE;
- if (s->maxval != 65535)
- avctx->pix_fmt = PIX_FMT_GRAY16;
+ 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;
+ } else 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 */
}
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, upgrade = 0;
- 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->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;
- if (s->maxval < 255)
- upgrade = 1;
- goto do_read;
- case PIX_FMT_GRAY16BE:
- case PIX_FMT_GRAY16LE:
- n = avctx->width * 2;
- if (s->maxval < 65535)
- upgrade = 2;
- 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++) {
- if (!upgrade)
- memcpy(ptr, s->bytestream, n);
- else if (upgrade == 1) {
- unsigned int j, f = (255*128 + s->maxval/2) / s->maxval;
- for (j=0; j<n; j++)
- ptr[j] = (s->bytestream[j] * f + 64) >> 7;
- } else if (upgrade == 2) {
- unsigned int j, v, f = (65535*32768 + s->maxval/2) / s->maxval;
- for (j=0; j<n/2; j++) {
- v = be2me_16(((uint16_t *)s->bytestream)[j]);
- ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
- }
- }
- s->bytestream += n;
- ptr += linesize;
- }
- break;
- case PIX_FMT_YUV420P:
- {
- unsigned char *ptr1, *ptr2;
-
- 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;
- ptr += linesize;
- }
- ptr1 = p->data[1];
- ptr2 = p->data[2];
- n >>= 1;
- h = avctx->height >> 1;
- for(i = 0; i < h; i++) {
- memcpy(ptr1, s->bytestream, n);
- s->bytestream += n;
- memcpy(ptr2, s->bytestream, n);
- s->bytestream += n;
- ptr1 += p->linesize[1];
- ptr2 += p->linesize[2];
- }
- }
- break;
- case PIX_FMT_RGB32:
- 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);
-
- return s->bytestream - s->bytestream_start;
-}
-
-static int pnm_encode_frame(AVCodecContext *avctx, unsigned char *outbuf, int buf_size, void *data){
- PNMContext *s = avctx->priv_data;
- AVFrame *pict = data;
- AVFrame * const p= (AVFrame*)&s->picture;
- 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;
-
- h = avctx->height;
- h1 = h;
- switch(avctx->pix_fmt) {
- case PIX_FMT_MONOWHITE:
- c = '4';
- n = (avctx->width + 7) >> 3;
- break;
- case PIX_FMT_GRAY8:
- c = '5';
- n = avctx->width;
- break;
- case PIX_FMT_GRAY16BE:
- c = '5';
- n = avctx->width * 2;
- break;
- case PIX_FMT_RGB24:
- c = '6';
- n = avctx->width * 3;
- break;
- case PIX_FMT_YUV420P:
- c = '5';
- n = avctx->width;
- h1 = (h * 3) / 2;
- break;
- default:
- return -1;
- }
- 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,
- "%d\n", (avctx->pix_fmt != PIX_FMT_GRAY16BE) ? 255 : 65535);
- s->bytestream += strlen(s->bytestream);
- }
-
- ptr = p->data[0];
- linesize = p->linesize[0];
- for(i=0;i<h;i++) {
- memcpy(s->bytestream, ptr, n);
- s->bytestream += n;
- ptr += linesize;
- }
-
- if (avctx->pix_fmt == PIX_FMT_YUV420P) {
- h >>= 1;
- n >>= 1;
- ptr1 = p->data[1];
- ptr2 = p->data[2];
- for(i=0;i<h;i++) {
- memcpy(s->bytestream, ptr1, n);
- s->bytestream += n;
- memcpy(s->bytestream, ptr2, n);
- s->bytestream += n;
- ptr1 += p->linesize[1];
- ptr2 += p->linesize[2];
- }
- }
- 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;
- AVFrame * const p= (AVFrame*)&s->picture;
- int i, h, w, n, linesize, depth, maxval;
- 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;
-
- h = avctx->height;
- w = avctx->width;
- switch(avctx->pix_fmt) {
- case PIX_FMT_MONOWHITE:
- n = (w + 7) >> 3;
- depth = 1;
- maxval = 1;
- tuple_type = "BLACKANDWHITE";
- break;
- case PIX_FMT_GRAY8:
- n = w;
- depth = 1;
- maxval = 255;
- tuple_type = "GRAYSCALE";
- break;
- case PIX_FMT_RGB24:
- n = w * 3;
- depth = 3;
- maxval = 255;
- tuple_type = "RGB";
- break;
- case PIX_FMT_RGB32:
- n = w * 4;
- depth = 4;
- maxval = 255;
- tuple_type = "RGB_ALPHA";
- break;
- default:
- return -1;
- }
- 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_RGB32) {
- int j;
- unsigned int v;
-
- for(i=0;i<h;i++) {
- for(j=0;j<w;j++) {
- v = ((uint32_t *)ptr)[j];
- *s->bytestream++ = v >> 16;
- *s->bytestream++ = v >> 8;
- *s->bytestream++ = v;
- *s->bytestream++ = v >> 24;
- }
- ptr += linesize;
- }
- } else {
- for(i=0;i<h;i++) {
- memcpy(s->bytestream, ptr, n);
- s->bytestream += n;
- ptr += linesize;
- }
- }
- return s->bytestream - s->bytestream_start;
-}
-
-#if 0
-static int pnm_probe(AVProbeData *pd)
-{
- const char *p = pd->buf;
- if (pd->buf_size >= 8 &&
- p[0] == 'P' &&
- p[1] >= '4' && p[1] <= '6' &&
- pnm_space(p[2]) )
- return AVPROBE_SCORE_MAX - 1; /* to permit pgmyuv probe */
- else
- return 0;
-}
-
-static int pgmyuv_probe(AVProbeData *pd)
-{
- if (match_ext(pd->filename, "pgmyuv"))
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-
-static int pam_probe(AVProbeData *pd)
-{
- const char *p = pd->buf;
- if (pd->buf_size >= 8 &&
- p[0] == 'P' &&
- p[1] == '7' &&
- p[2] == '\n')
- return AVPROBE_SCORE_MAX;
- else
- return 0;
-}
-#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,
- CODEC_ID_PGM,
- sizeof(PNMContext),
- common_init,
- pnm_encode_frame,
- NULL, //encode_end,
- pnm_decode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_GRAY8, PIX_FMT_GRAY16BE, -1},
-};
-#endif // CONFIG_PGM_ENCODER
-
-#ifdef CONFIG_PGMYUV_ENCODER
-AVCodec pgmyuv_encoder = {
- "pgmyuv",
- CODEC_TYPE_VIDEO,
- CODEC_ID_PGMYUV,
- sizeof(PNMContext),
- common_init,
- pnm_encode_frame,
- NULL, //encode_end,
- pnm_decode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
-};
-#endif // CONFIG_PGMYUV_ENCODER
-
-#ifdef CONFIG_PPM_ENCODER
-AVCodec ppm_encoder = {
- "ppm",
- CODEC_TYPE_VIDEO,
- CODEC_ID_PPM,
- sizeof(PNMContext),
- common_init,
- pnm_encode_frame,
- NULL, //encode_end,
- pnm_decode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, -1},
-};
-#endif // CONFIG_PPM_ENCODER
-
-#ifdef CONFIG_PBM_ENCODER
-AVCodec pbm_encoder = {
- "pbm",
- CODEC_TYPE_VIDEO,
- CODEC_ID_PBM,
- sizeof(PNMContext),
- common_init,
- pnm_encode_frame,
- NULL, //encode_end,
- pnm_decode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_MONOWHITE, -1},
-};
-#endif // CONFIG_PBM_ENCODER
-
-#ifdef CONFIG_PAM_ENCODER
-AVCodec pam_encoder = {
- "pam",
- CODEC_TYPE_VIDEO,
- CODEC_ID_PAM,
- sizeof(PNMContext),
- common_init,
- pam_encode_frame,
- NULL, //encode_end,
- pnm_decode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, -1},
-};
-#endif // CONFIG_PAM_ENCODER
projects / frescor / ffmpeg.git / blobdiff