rename pnm.c to pnmenc.c and pnm_common.c to pnm.c

Originally committed as revision 8996 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 426 insertions, 0 deletions

diff --git a/libavcodec/pnmenc.c b/libavcodec/pnmenc.c
new file mode 100644
index 0000000000..46f7e6e98a
--- /dev/null
+++ b/libavcodec/pnmenc.c
@@ -0,0 +1,426 @@
+/*
+ * 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 "pnm.h"
+
+
+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_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(ff_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_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