ffmpeg/libavcodec/dpxenc.c

   1 /*
   2  * DPX (.dpx) image encoder
   3  * Copyright (c) 2011 Peter Ross <pross@xvid.org>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "libavutil/common.h"
  23 #include "libavutil/intreadwrite.h"
  24 #include "libavutil/imgutils.h"
  25 #include "avcodec.h"
  26 #include "internal.h"
  27
  28 typedef struct DPXContext {
  29     int big_endian;
  30     int bits_per_component;
  31     int num_components;
  32     int descriptor;
  33     int planar;
  34 } DPXContext;
  35
  36 static av_cold int encode_init(AVCodecContext *avctx)
  37 {
  38     DPXContext *s = avctx->priv_data;
  39     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
  40
  41     s->big_endian         = !!(desc->flags & AV_PIX_FMT_FLAG_BE);
  42     s->bits_per_component = desc->comp[0].depth_minus1 + 1;
  43     s->num_components     = desc->nb_components;
  44     s->descriptor         = (desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? 51 : 50;
  45     s->planar             = !!(desc->flags & AV_PIX_FMT_FLAG_PLANAR);
  46
  47     switch (avctx->pix_fmt) {
  48     case AV_PIX_FMT_ABGR:
  49         s->descriptor = 52;
  50         break;
  51     case AV_PIX_FMT_GRAY16BE:
  52     case AV_PIX_FMT_GRAY16LE:
  53     case AV_PIX_FMT_GRAY8:
  54         s->descriptor = 6;
  55         break;
  56     case AV_PIX_FMT_GBRP10BE:
  57     case AV_PIX_FMT_GBRP10LE:
  58     case AV_PIX_FMT_GBRP12BE:
  59     case AV_PIX_FMT_GBRP12LE:
  60     case AV_PIX_FMT_RGB24:
  61     case AV_PIX_FMT_RGBA64BE:
  62     case AV_PIX_FMT_RGBA64LE:
  63     case AV_PIX_FMT_RGBA:
  64         break;
  65     case AV_PIX_FMT_RGB48LE:
  66     case AV_PIX_FMT_RGB48BE:
  67         if (avctx->bits_per_raw_sample)
  68             s->bits_per_component = avctx->bits_per_raw_sample;
  69         break;
  70     default:
  71         av_log(avctx, AV_LOG_INFO, "unsupported pixel format\n");
  72         return -1;
  73     }
  74
  75     return 0;
  76 }
  77
  78 #define write16(p, value) \
  79 do { \
  80     if (s->big_endian) AV_WB16(p, value); \
  81     else               AV_WL16(p, value); \
  82 } while(0)
  83
  84 #define write32(p, value) \
  85 do { \
  86     if (s->big_endian) AV_WB32(p, value); \
  87     else               AV_WL32(p, value); \
  88 } while(0)
  89
  90 static void encode_rgb48_10bit(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
  91 {
  92     DPXContext *s = avctx->priv_data;
  93     const uint8_t *src = pic->data[0];
  94     int x, y;
  95
  96     for (y = 0; y < avctx->height; y++) {
  97         for (x = 0; x < avctx->width; x++) {
  98             int value;
  99             if (s->big_endian) {
 100                 value = ((AV_RB16(src + 6*x + 4) & 0xFFC0U) >> 4)
 101                       | ((AV_RB16(src + 6*x + 2) & 0xFFC0U) << 6)
 102                       | ((AV_RB16(src + 6*x + 0) & 0xFFC0U) << 16);
 103             } else {
 104                 value = ((AV_RL16(src + 6*x + 4) & 0xFFC0U) >> 4)
 105                       | ((AV_RL16(src + 6*x + 2) & 0xFFC0U) << 6)
 106                       | ((AV_RL16(src + 6*x + 0) & 0xFFC0U) << 16);
 107             }
 108             write32(dst, value);
 109             dst += 4;
 110         }
 111         src += pic->linesize[0];
 112     }
 113 }
 114
 115 static void encode_gbrp10(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
 116 {
 117     DPXContext *s = avctx->priv_data;
 118     const uint8_t *src[3] = {pic->data[0], pic->data[1], pic->data[2]};
 119     int x, y, i;
 120
 121     for (y = 0; y < avctx->height; y++) {
 122         for (x = 0; x < avctx->width; x++) {
 123             int value;
 124             if (s->big_endian) {
 125                 value = (AV_RB16(src[0] + 2*x) << 12)
 126                       | (AV_RB16(src[1] + 2*x) << 2)
 127                       | ((unsigned)AV_RB16(src[2] + 2*x) << 22);
 128             } else {
 129                 value = (AV_RL16(src[0] + 2*x) << 12)
 130                       | (AV_RL16(src[1] + 2*x) << 2)
 131                       | ((unsigned)AV_RL16(src[2] + 2*x) << 22);
 132             }
 133             write32(dst, value);
 134             dst += 4;
 135         }
 136         for (i = 0; i < 3; i++)
 137             src[i] += pic->linesize[i];
 138     }
 139 }
 140
 141 static void encode_gbrp12(AVCodecContext *avctx, const AVPicture *pic, uint16_t *dst)
 142 {
 143     DPXContext *s = avctx->priv_data;
 144     const uint16_t *src[3] = {(uint16_t*)pic->data[0],
 145                               (uint16_t*)pic->data[1],
 146                               (uint16_t*)pic->data[2]};
 147     int x, y, i, pad;
 148     pad = avctx->width*6;
 149     pad = (FFALIGN(pad, 4) - pad) >> 1;
 150     for (y = 0; y < avctx->height; y++) {
 151         for (x = 0; x < avctx->width; x++) {
 152             uint16_t value[3];
 153             if (s->big_endian) {
 154                 value[1] = AV_RB16(src[0] + x) << 4;
 155                 value[2] = AV_RB16(src[1] + x) << 4;
 156                 value[0] = AV_RB16(src[2] + x) << 4;
 157             } else {
 158                 value[1] = AV_RL16(src[0] + x) << 4;
 159                 value[2] = AV_RL16(src[1] + x) << 4;
 160                 value[0] = AV_RL16(src[2] + x) << 4;
 161             }
 162             for (i = 0; i < 3; i++)
 163                 write16(dst++, value[i]);
 164         }
 165         for (i = 0; i < pad; i++)
 166             *dst++ = 0;
 167         for (i = 0; i < 3; i++)
 168             src[i] += pic->linesize[i]/2;
 169     }
 170 }
 171
 172 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
 173                         const AVFrame *frame, int *got_packet)
 174 {
 175     DPXContext *s = avctx->priv_data;
 176     int size, ret, need_align, len;
 177     uint8_t *buf;
 178
 179 #define HEADER_SIZE 1664  /* DPX Generic header */
 180     if (s->bits_per_component == 10)
 181         size = avctx->height * avctx->width * 4;
 182     else if (s->bits_per_component == 12) {
 183         // 3 components, 12 bits put on 16 bits
 184         len  = avctx->width*6;
 185         size = FFALIGN(len, 4);
 186         need_align = size - len;
 187         size *= avctx->height;
 188     } else {
 189         // N components, M bits
 190         len = avctx->width * s->num_components * s->bits_per_component >> 3;
 191         size = FFALIGN(len, 4);
 192         need_align = size - len;
 193         size *= avctx->height;
 194     }
 195     if ((ret = ff_alloc_packet2(avctx, pkt, size + HEADER_SIZE)) < 0)
 196         return ret;
 197     buf = pkt->data;
 198
 199     memset(buf, 0, HEADER_SIZE);
 200
 201     /* File information header */
 202     write32(buf,       MKBETAG('S','D','P','X'));
 203     write32(buf +   4, HEADER_SIZE);
 204     memcpy (buf +   8, "V1.0", 4);
 205     write32(buf +  20, 1); /* new image */
 206     write32(buf +  24, HEADER_SIZE);
 207     if (!(avctx->flags & CODEC_FLAG_BITEXACT))
 208         memcpy (buf + 160, LIBAVCODEC_IDENT, FFMIN(sizeof(LIBAVCODEC_IDENT), 100));
 209     write32(buf + 660, 0xFFFFFFFF); /* unencrypted */
 210
 211     /* Image information header */
 212     write16(buf + 768, 0); /* orientation; left to right, top to bottom */
 213     write16(buf + 770, 1); /* number of elements */
 214     write32(buf + 772, avctx->width);
 215     write32(buf + 776, avctx->height);
 216     buf[800] = s->descriptor;
 217     buf[801] = 2; /* linear transfer */
 218     buf[802] = 2; /* linear colorimetric */
 219     buf[803] = s->bits_per_component;
 220     write16(buf + 804, (s->bits_per_component == 10 || s->bits_per_component == 12) ?
 221                        1 : 0); /* packing method */
 222     write32(buf + 808, HEADER_SIZE); /* data offset */
 223
 224     /* Image source information header */
 225     write32(buf + 1628, avctx->sample_aspect_ratio.num);
 226     write32(buf + 1632, avctx->sample_aspect_ratio.den);
 227
 228     switch(s->bits_per_component) {
 229     case 8:
 230     case 16:
 231         if (need_align) {
 232             int j;
 233             const uint8_t *src = frame->data[0];
 234             uint8_t *dst = pkt->data + HEADER_SIZE;
 235             size = (len + need_align) * avctx->height;
 236             for (j=0; j<avctx->height; j++) {
 237                 memcpy(dst, src, len);
 238                 memset(dst + len, 0, need_align);
 239                 dst += len + need_align;
 240                 src += frame->linesize[0];
 241             }
 242         } else {
 243             size = avpicture_layout((const AVPicture*)frame, avctx->pix_fmt,
 244                                     avctx->width, avctx->height,
 245                                     buf + HEADER_SIZE, pkt->size - HEADER_SIZE);
 246         }
 247         if (size < 0)
 248             return size;
 249         break;
 250     case 10:
 251         if (s->planar)
 252             encode_gbrp10(avctx, (const AVPicture*)frame, buf + HEADER_SIZE);
 253         else
 254             encode_rgb48_10bit(avctx, (const AVPicture*)frame, buf + HEADER_SIZE);
 255         break;
 256     case 12:
 257         encode_gbrp12(avctx, (const AVPicture*)frame, (uint16_t*)(buf + HEADER_SIZE));
 258         break;
 259     default:
 260         av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", s->bits_per_component);
 261         return -1;
 262     }
 263
 264     size += HEADER_SIZE;
 265
 266     write32(buf + 16, size); /* file size */
 267
 268     pkt->flags |= AV_PKT_FLAG_KEY;
 269     *got_packet = 1;
 270
 271     return 0;
 272 }
 273
 274 AVCodec ff_dpx_encoder = {
 275     .name           = "dpx",
 276     .long_name      = NULL_IF_CONFIG_SMALL("DPX (Digital Picture Exchange) image"),
 277     .type           = AVMEDIA_TYPE_VIDEO,
 278     .id             = AV_CODEC_ID_DPX,
 279     .priv_data_size = sizeof(DPXContext),
 280     .init           = encode_init,
 281     .encode2        = encode_frame,
 282     .pix_fmts       = (const enum AVPixelFormat[]){
 283         AV_PIX_FMT_GRAY8,
 284         AV_PIX_FMT_RGB24,    AV_PIX_FMT_RGBA, AV_PIX_FMT_ABGR,
 285         AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE,
 286         AV_PIX_FMT_RGB48LE,  AV_PIX_FMT_RGB48BE,
 287         AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_RGBA64BE,
 288         AV_PIX_FMT_GBRP10LE, AV_PIX_FMT_GBRP10BE,
 289         AV_PIX_FMT_GBRP12LE, AV_PIX_FMT_GBRP12BE,
 290         AV_PIX_FMT_NONE},
 291 };