mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
move pnm parser in its own file
Originally committed as revision 8988 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs
parent
b16560a389
commit
426a189b77
@ -35,7 +35,7 @@ OBJS= bitstream.o \
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vp3dsp.o \
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h264idct.o \
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rangecoder.o \
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pnm.o \
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pnm.o pnm_common.o \
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h263.o \
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opt.o \
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bitstream_filter.o \
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@ -295,7 +295,7 @@ OBJS-$(CONFIG_MJPEG_PARSER) += mjpeg_parser.o
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OBJS-$(CONFIG_MPEG4VIDEO_PARSER) += mpeg4video_parser.o
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OBJS-$(CONFIG_MPEGAUDIO_PARSER) += mpegaudio_parser.o
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OBJS-$(CONFIG_MPEGVIDEO_PARSER) += mpegvideo_parser.o
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OBJS-$(CONFIG_PNM_PARSER) += pnm.o
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OBJS-$(CONFIG_PNM_PARSER) += pnm_parser.o pnm_common.o
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OBJS-$(CONFIG_VC1_PARSER) += vc1_parser.o
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OBJS-$(HAVE_PTHREADS) += pthread.o
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206
libavcodec/pnm.c
206
libavcodec/pnm.c
@ -19,46 +19,8 @@
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "parser.h" //for ParseContext
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#include "pnm.h"
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typedef struct PNMContext {
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uint8_t *bytestream;
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uint8_t *bytestream_start;
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uint8_t *bytestream_end;
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AVFrame picture;
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int maxval; ///< maximum value of a pixel
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} PNMContext;
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static inline int pnm_space(int c)
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{
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return (c == ' ' || c == '\n' || c == '\r' || c == '\t');
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}
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static void pnm_get(PNMContext *sc, char *str, int buf_size)
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{
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char *s;
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int c;
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/* skip spaces and comments */
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for(;;) {
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c = *sc->bytestream++;
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if (c == '#') {
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do {
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c = *sc->bytestream++;
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} while (c != '\n' && sc->bytestream < sc->bytestream_end);
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} else if (!pnm_space(c)) {
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break;
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}
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}
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s = str;
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while (sc->bytestream < sc->bytestream_end && !pnm_space(c)) {
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if ((s - str) < buf_size - 1)
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*s++ = c;
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c = *sc->bytestream++;
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}
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*s = '\0';
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}
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static int common_init(AVCodecContext *avctx){
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PNMContext *s = avctx->priv_data;
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@ -69,100 +31,6 @@ static int common_init(AVCodecContext *avctx){
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return 0;
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}
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static int pnm_decode_header(AVCodecContext *avctx, PNMContext * const s){
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char buf1[32], tuple_type[32];
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int h, w, depth, maxval;
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pnm_get(s, buf1, sizeof(buf1));
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if (!strcmp(buf1, "P4")) {
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avctx->pix_fmt = PIX_FMT_MONOWHITE;
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} else if (!strcmp(buf1, "P5")) {
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if (avctx->codec_id == CODEC_ID_PGMYUV)
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avctx->pix_fmt = PIX_FMT_YUV420P;
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else
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avctx->pix_fmt = PIX_FMT_GRAY8;
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} else if (!strcmp(buf1, "P6")) {
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avctx->pix_fmt = PIX_FMT_RGB24;
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} else if (!strcmp(buf1, "P7")) {
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w = -1;
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h = -1;
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maxval = -1;
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depth = -1;
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tuple_type[0] = '\0';
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for(;;) {
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pnm_get(s, buf1, sizeof(buf1));
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if (!strcmp(buf1, "WIDTH")) {
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pnm_get(s, buf1, sizeof(buf1));
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w = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "HEIGHT")) {
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pnm_get(s, buf1, sizeof(buf1));
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h = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "DEPTH")) {
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pnm_get(s, buf1, sizeof(buf1));
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depth = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "MAXVAL")) {
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pnm_get(s, buf1, sizeof(buf1));
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maxval = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "TUPLETYPE")) {
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pnm_get(s, tuple_type, sizeof(tuple_type));
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} else if (!strcmp(buf1, "ENDHDR")) {
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break;
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} else {
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return -1;
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}
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}
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/* check that all tags are present */
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if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0' || avcodec_check_dimensions(avctx, w, h))
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return -1;
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avctx->width = w;
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avctx->height = h;
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if (depth == 1) {
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if (maxval == 1)
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avctx->pix_fmt = PIX_FMT_MONOWHITE;
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else
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avctx->pix_fmt = PIX_FMT_GRAY8;
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} else if (depth == 3) {
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avctx->pix_fmt = PIX_FMT_RGB24;
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} else if (depth == 4) {
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avctx->pix_fmt = PIX_FMT_RGB32;
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} else {
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return -1;
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}
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return 0;
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} else {
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return -1;
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}
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pnm_get(s, buf1, sizeof(buf1));
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avctx->width = atoi(buf1);
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if (avctx->width <= 0)
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return -1;
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pnm_get(s, buf1, sizeof(buf1));
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avctx->height = atoi(buf1);
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if(avcodec_check_dimensions(avctx, avctx->width, avctx->height))
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return -1;
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if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
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pnm_get(s, buf1, sizeof(buf1));
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s->maxval = atoi(buf1);
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if(s->maxval >= 256 && avctx->pix_fmt == PIX_FMT_GRAY8) {
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avctx->pix_fmt = PIX_FMT_GRAY16BE;
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if (s->maxval != 65535)
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avctx->pix_fmt = PIX_FMT_GRAY16;
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}
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}
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/* more check if YUV420 */
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if (avctx->pix_fmt == PIX_FMT_YUV420P) {
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if ((avctx->width & 1) != 0)
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return -1;
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h = (avctx->height * 2);
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if ((h % 3) != 0)
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return -1;
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h /= 3;
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avctx->height = h;
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}
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return 0;
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}
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static int pnm_decode_frame(AVCodecContext *avctx,
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void *data, int *data_size,
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uint8_t *buf, int buf_size)
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@ -177,7 +45,7 @@ static int pnm_decode_frame(AVCodecContext *avctx,
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s->bytestream= buf;
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s->bytestream_end= buf + buf_size;
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if(pnm_decode_header(avctx, s) < 0)
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if(ff_pnm_decode_header(avctx, s) < 0)
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return -1;
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if(p->data[0])
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@ -486,76 +354,6 @@ static int pam_probe(AVProbeData *pd)
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}
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#endif
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#ifdef CONFIG_PNM_PARSER
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static int pnm_parse(AVCodecParserContext *s,
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AVCodecContext *avctx,
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const uint8_t **poutbuf, int *poutbuf_size,
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const uint8_t *buf, int buf_size)
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{
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ParseContext *pc = s->priv_data;
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PNMContext pnmctx;
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int next;
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for(; pc->overread>0; pc->overread--){
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pc->buffer[pc->index++]= pc->buffer[pc->overread_index++];
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}
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retry:
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if(pc->index){
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pnmctx.bytestream_start=
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pnmctx.bytestream= pc->buffer;
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pnmctx.bytestream_end= pc->buffer + pc->index;
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}else{
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pnmctx.bytestream_start=
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pnmctx.bytestream= (uint8_t *) buf; /* casts avoid warnings */
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pnmctx.bytestream_end= (uint8_t *) buf + buf_size;
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}
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if(pnm_decode_header(avctx, &pnmctx) < 0){
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if(pnmctx.bytestream < pnmctx.bytestream_end){
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if(pc->index){
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pc->index=0;
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}else{
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buf++;
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buf_size--;
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}
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goto retry;
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}
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#if 0
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if(pc->index && pc->index*2 + FF_INPUT_BUFFER_PADDING_SIZE < pc->buffer_size && buf_size > pc->index){
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memcpy(pc->buffer + pc->index, buf, pc->index);
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pc->index += pc->index;
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buf += pc->index;
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buf_size -= pc->index;
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goto retry;
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}
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#endif
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next= END_NOT_FOUND;
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}else{
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next= pnmctx.bytestream - pnmctx.bytestream_start
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+ avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
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if(pnmctx.bytestream_start!=buf)
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next-= pc->index;
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if(next > buf_size)
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next= END_NOT_FOUND;
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}
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if(ff_combine_frame(pc, next, &buf, &buf_size)<0){
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*poutbuf = NULL;
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*poutbuf_size = 0;
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return buf_size;
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}
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*poutbuf = buf;
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*poutbuf_size = buf_size;
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return next;
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}
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AVCodecParser pnm_parser = {
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{ CODEC_ID_PGM, CODEC_ID_PGMYUV, CODEC_ID_PPM, CODEC_ID_PBM, CODEC_ID_PAM},
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sizeof(ParseContext),
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NULL,
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pnm_parse,
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ff_parse_close,
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};
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#endif /* CONFIG_PNM_PARSER */
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#ifdef CONFIG_PGM_ENCODER
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AVCodec pgm_encoder = {
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37
libavcodec/pnm.h
Normal file
37
libavcodec/pnm.h
Normal file
@ -0,0 +1,37 @@
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/*
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* PNM image format
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* Copyright (c) 2002, 2003 Fabrice Bellard.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef PNM_H
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#define PNM_H
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#include "avcodec.h"
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typedef struct PNMContext {
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uint8_t *bytestream;
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uint8_t *bytestream_start;
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uint8_t *bytestream_end;
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AVFrame picture;
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int maxval; ///< maximum value of a pixel
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} PNMContext;
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int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s);
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#endif /* PNM_H */
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147
libavcodec/pnm_common.c
Normal file
147
libavcodec/pnm_common.c
Normal file
@ -0,0 +1,147 @@
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/*
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* PNM image format
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* Copyright (c) 2002, 2003 Fabrice Bellard.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "pnm.h"
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static inline int pnm_space(int c)
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{
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return (c == ' ' || c == '\n' || c == '\r' || c == '\t');
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}
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static void pnm_get(PNMContext *sc, char *str, int buf_size)
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{
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char *s;
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int c;
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/* skip spaces and comments */
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for(;;) {
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c = *sc->bytestream++;
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if (c == '#') {
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do {
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c = *sc->bytestream++;
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} while (c != '\n' && sc->bytestream < sc->bytestream_end);
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} else if (!pnm_space(c)) {
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break;
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}
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}
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s = str;
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while (sc->bytestream < sc->bytestream_end && !pnm_space(c)) {
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if ((s - str) < buf_size - 1)
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*s++ = c;
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c = *sc->bytestream++;
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}
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*s = '\0';
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}
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int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s){
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char buf1[32], tuple_type[32];
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int h, w, depth, maxval;
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pnm_get(s, buf1, sizeof(buf1));
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if (!strcmp(buf1, "P4")) {
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avctx->pix_fmt = PIX_FMT_MONOWHITE;
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} else if (!strcmp(buf1, "P5")) {
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if (avctx->codec_id == CODEC_ID_PGMYUV)
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avctx->pix_fmt = PIX_FMT_YUV420P;
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else
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avctx->pix_fmt = PIX_FMT_GRAY8;
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} else if (!strcmp(buf1, "P6")) {
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avctx->pix_fmt = PIX_FMT_RGB24;
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} else if (!strcmp(buf1, "P7")) {
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w = -1;
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h = -1;
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maxval = -1;
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depth = -1;
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tuple_type[0] = '\0';
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for(;;) {
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pnm_get(s, buf1, sizeof(buf1));
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if (!strcmp(buf1, "WIDTH")) {
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pnm_get(s, buf1, sizeof(buf1));
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w = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "HEIGHT")) {
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pnm_get(s, buf1, sizeof(buf1));
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h = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "DEPTH")) {
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pnm_get(s, buf1, sizeof(buf1));
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depth = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "MAXVAL")) {
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pnm_get(s, buf1, sizeof(buf1));
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maxval = strtol(buf1, NULL, 10);
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} else if (!strcmp(buf1, "TUPLETYPE")) {
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pnm_get(s, tuple_type, sizeof(tuple_type));
|
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} else if (!strcmp(buf1, "ENDHDR")) {
|
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break;
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} else {
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return -1;
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}
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}
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/* check that all tags are present */
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if (w <= 0 || h <= 0 || maxval <= 0 || depth <= 0 || tuple_type[0] == '\0' || avcodec_check_dimensions(avctx, w, h))
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return -1;
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avctx->width = w;
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avctx->height = h;
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if (depth == 1) {
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if (maxval == 1)
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avctx->pix_fmt = PIX_FMT_MONOWHITE;
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else
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avctx->pix_fmt = PIX_FMT_GRAY8;
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} else if (depth == 3) {
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avctx->pix_fmt = PIX_FMT_RGB24;
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} else if (depth == 4) {
|
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avctx->pix_fmt = PIX_FMT_RGB32;
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} else {
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return -1;
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}
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return 0;
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} else {
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return -1;
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}
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pnm_get(s, buf1, sizeof(buf1));
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avctx->width = atoi(buf1);
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if (avctx->width <= 0)
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return -1;
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pnm_get(s, buf1, sizeof(buf1));
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avctx->height = atoi(buf1);
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if(avcodec_check_dimensions(avctx, avctx->width, avctx->height))
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return -1;
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if (avctx->pix_fmt != PIX_FMT_MONOWHITE) {
|
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pnm_get(s, buf1, sizeof(buf1));
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s->maxval = atoi(buf1);
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if(s->maxval >= 256 && avctx->pix_fmt == PIX_FMT_GRAY8) {
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avctx->pix_fmt = PIX_FMT_GRAY16BE;
|
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if (s->maxval != 65535)
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avctx->pix_fmt = PIX_FMT_GRAY16;
|
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}
|
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}
|
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/* more check if YUV420 */
|
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if (avctx->pix_fmt == PIX_FMT_YUV420P) {
|
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if ((avctx->width & 1) != 0)
|
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return -1;
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h = (avctx->height * 2);
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if ((h % 3) != 0)
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return -1;
|
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h /= 3;
|
||||
avctx->height = h;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
93
libavcodec/pnm_parser.c
Normal file
93
libavcodec/pnm_parser.c
Normal file
@ -0,0 +1,93 @@
|
||||
/*
|
||||
* PNM image parser
|
||||
* Copyright (c) 2002, 2003 Fabrice Bellard.
|
||||
*
|
||||
* 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 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* 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 FFmpeg; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include "parser.h" //for ParseContext
|
||||
#include "pnm.h"
|
||||
|
||||
|
||||
static int pnm_parse(AVCodecParserContext *s,
|
||||
AVCodecContext *avctx,
|
||||
const 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(ff_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, &buf, &buf_size)<0){
|
||||
*poutbuf = NULL;
|
||||
*poutbuf_size = 0;
|
||||
return buf_size;
|
||||
}
|
||||
*poutbuf = 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,
|
||||
};
|
||||
Loading…
Reference in New Issue
Block a user