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Diffstat (limited to 'contrib/ffmpeg/libavcodec/pnm.c')
-rw-r--r--contrib/ffmpeg/libavcodec/pnm.c606
1 files changed, 606 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/pnm.c b/contrib/ffmpeg/libavcodec/pnm.c
new file mode 100644
index 000000000..610bb28be
--- /dev/null
+++ b/contrib/ffmpeg/libavcodec/pnm.c
@@ -0,0 +1,606 @@
+/*
+ * PNM image format
+ * 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 "avcodec.h"
+#include "parser.h" //for ParseContext
+
+typedef struct PNMContext {
+ uint8_t *bytestream;
+ uint8_t *bytestream_start;
+ uint8_t *bytestream_end;
+ AVFrame picture;
+} PNMContext;
+
+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)
+{
+ char *s;
+ int c;
+
+ /* skip spaces and comments */
+ for(;;) {
+ c = *sc->bytestream++;
+ if (c == '#') {
+ do {
+ c = *sc->bytestream++;
+ } while (c != '\n' && sc->bytestream < sc->bytestream_end);
+ } else if (!pnm_space(c)) {
+ break;
+ }
+ }
+
+ s = str;
+ while (sc->bytestream < sc->bytestream_end && !pnm_space(c)) {
+ if ((s - str) < buf_size - 1)
+ *s++ = c;
+ c = *sc->bytestream++;
+ }
+ *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){
+ 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_RGBA32;
+ } 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_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->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_GRAY16BE:
+ n = avctx->width * 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++) {
+ memcpy(ptr, s->bytestream, n);
+ 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_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);
+
+ 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_RGBA32:
+ 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_RGBA32) {
+ 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_RGBA32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, -1},
+};
+#endif // CONFIG_PAM_ENCODER
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-26 02:59:19 +0000